CN207064806U - A kind of fluid flow auto-control valve - Google Patents
A kind of fluid flow auto-control valve Download PDFInfo
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- CN207064806U CN207064806U CN201720430926.3U CN201720430926U CN207064806U CN 207064806 U CN207064806 U CN 207064806U CN 201720430926 U CN201720430926 U CN 201720430926U CN 207064806 U CN207064806 U CN 207064806U
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Abstract
The utility model discloses a kind of fluid flow auto-control valve, including valve body, flow information collecting mechanism, flow control device, fluid passage is offered in valve body, flow information collecting mechanism includes pole wheel, impeller, hall sensor component, impeller is arranged in fluid passage, pole wheel is rotatably arranged on impeller rear, hall sensor component is corresponding with pole wheel, liquid enters in front of impeller, rotated after impeller and drive pole wheel rotation to produce alternating magnetic field, hall sensor component is able to detect that changes of magnetic field frequency；Flow control device includes electronic Flow-rate adjustment valve module and governor valve control device, governor valve control device can adjust the aperture of Flow-rate adjustment valve module according to the frequency signal of hall sensor component, Flow-rate adjustment control is simple, it is and compact-sized, compact, it is simple to adjust circuit design, there is excellent degree of regulation and job stability, is suitable for fluid flow collection and controls to adjust equipment.
Description
Technical field
A kind of flow control valve is the utility model is related to, particularly a kind of fluid flow auto-control valve.
Background technology
Present gas heater consumption market, mainly based on fully-automatic intelligent digital thermostat fast gas heater,
Such water heater be equipped with gas circuit end can realize gas flow precision control and pressure stability effect gas ratio valve and by
To pursuing for market, the appearance of gas ratio valve, the Dynamic Matching control of gas medium is realized, can be according to different burners
Condition, different type of machines configuration real-time monitoring gas flow size, shower temperature is realized in certain temperature operation interval well
Accurate control, but for water heater water route end but be not carried out automation accurate control, be also in and lead directly in originally
The opening water route pattern of water lines, only adjust the regulating valve of current size manually equipped with one in water inlet end.
Due to the design of water heater thermic load, when water inlet end temperature is relatively low, water heater temperature is unable to reach needed for people
Shower temperature, it is necessary to manual de-regulation inflow to meet the requirement of shower temperature, this and nominal fully-automatic intelligent constant temperature
Water heater mutually deviates from, and full-automatic function is not realized at least in terms of the current regulation at water route end.
At present, also there is the control valve for being used to control fluid in the presence of some, for example mostly on gas heater is using stepping electricity
Machine controls water-carrying capacity size, but higher using the cost of step motor control, and drive circuit and related software code are relatively multiple
Miscellaneous, connecting line is more（8）, come inconvenience, while traditional stepping electricity to the design of control panel and the connect band of controlling valve
Machine control program failure is more, Flow-rate adjustment is relatively slow, is difficult to accurately obtain regulation progress（Typically rely on the big stream of the low hysteresis of precision
Harvester structure feeds back flow information）, noise it is larger（Continuously adjust and take, user is readily appreciated that mechanical sounds）, therefore use
Effect is not ideal enough, it is more difficult to promotes.
The content of the invention
For overcome the deficiencies in the prior art, the utility model offer is a kind of simple in construction, reasonable in design, compact-sized,
Flow-rate adjustment control is simple, realizes the auto-control valve of the electrodeless linear regulation of fluid flow.
Technical scheme is used by the utility model solves its technical problem：
A kind of fluid flow auto-control valve, including regulation and control valve body, the regulation and control valve body include valve body, flow information
Collecting mechanism, flow control device, fluid passage, the flow information collecting mechanism and Flow-rate adjustment are offered in the valve body
Mechanism is arranged in fluid passage；
The flow control device includes an electronic Flow-rate adjustment valve module and governor valve control device, the regulating valve control
Device processed is connected with flow information collecting mechanism and can be according to the Signal Regulation Flow-rate adjustment valve module of flow information collecting mechanism
Aperture.
The flow information collecting mechanism includes pole wheel, impeller, hall sensor component, and the impeller is arranged on stream
In body passage, the pole wheel is rotatably arranged on impeller rear, and is provided with and can pass through for liquid on the pole wheel
Passage, the hall sensor component is arranged on valve body and corresponding with pole wheel, and liquid enters in front of the impeller, through leaf
Rotated after wheel and drive pole wheel rotation to produce alternating magnetic field, the hall sensor component is able to detect that magnetic field becomes
Change frequency.
The Flow-rate adjustment valve module includes valve element, rotary drive mechanism, and the valve core rotation is arranged in fluid passage,
And valve element outer wall coordinates with fluid passage sealing, the valve element is laterally disposed a limbers, and the rotary drive mechanism can
The fit angle of valve core rotation regulation limbers and fluid passage is driven to realize aperture regulation.
The rotary drive mechanism is a steering wheel, and the cavity for installing steering wheel is offered in the valve body, and in the sky
The upper lid for positioning fixed steering wheel is provided with chamber, the output of the steering wheel is pivotally connected to valve element.
The angle range of the steering wheel is 0 ° to 90 ° or 0 ° to 180 °.
The torsion of the steering wheel is 2 Kgf.cm (at 4.8V) to 32Kgf.cm (at 4.8V).
The operating voltage range of the steering wheel is 3.0V to 7.4V.
The steering wheel is simulation steering wheel.
The valve element top is rotatably arranged on a collar, and the collar is arranged on valve body.
Valve core seal ring is provided between valve element and the collar inwall.
Collar sealing ring is provided between the collar outer wall and valve body.
An impeller sleeve is configured with the fluid passage, the impeller is fixed and is located in the impeller sleeve.
A rotor sleeve is configured with the fluid passage, the rotor sleeve rear end is provided with a swivel base, the magnetic pole
Two ends of rotor is respectively arranged with rotating shaft, and the swivel base is with being respectively arranged with the axle coordinated with the rotating shaft of pole wheel both ends on impeller
Hole.
A steel ball is configured with the axis hole of the swivel base.
It is a hall circuitboard that the hall sensor component, which includes, and the hall circuitboard is fixed on valve body, and institute
State the top that hall circuitboard is located at pole wheel center.
The pole wheel is in crosswise.
Preferably, the governor valve control device internal memory contains the linear of changes of magnetic field frequency and the proportionate relationship of uninterrupted
Data, the governor valve control device can receive the setting data on flows of outside input, and the governor valve control device is according to Hall
The frequency signal of sensor cluster contrasts to obtain current traffic data with linear data, and passes through current traffic data and setting
Data on flows contrast control Flow-rate adjustment valve module, adjusts Flow-rate adjustment valve module aperture, so as to realize Flow-rate adjustment.
The impeller sleeve is positioned in fluid passage by buckle structure.
The rotor sleeve is positioned in fluid passage by buckle structure.
The beneficial effects of the utility model are：A kind of fluid flow auto-control valve, including regulation and control valve body, the regulation and control
Valve body includes valve body, flow information collecting mechanism, flow control device, and fluid passage, the stream are offered in the valve body
Amount information gathering mechanism and flow control device are arranged in fluid passage；The flow information collecting mechanism turns including magnetic pole
Son, impeller, hall sensor component, the impeller are arranged in fluid passage, after the pole wheel is rotatably arranged on impeller
Side and the axial direction of pole wheel and fluid flow direction are in the same direction, and the passage that can be passed through for liquid is provided with the pole wheel,
The hall sensor component is arranged on valve body and corresponding with pole wheel.
Liquid enters in front of impeller, is rotated after impeller and drives pole wheel rotation to produce alternating magnetic field, institute
State hall sensor component and be able to detect that changes of magnetic field frequency；The flow control device includes an electronic flow control valve
Component and governor valve control device, the governor valve control device are connected with hall sensor component and can be according to Hall sensor groups
The aperture of the frequency signal regulation Flow-rate adjustment valve module of part, Flow-rate adjustment control is simple, and compact-sized, compact, adjusts
It is simple to save circuit design, there is excellent degree of regulation and job stability, is suitable for fluid flow collection and control and regulation is set
It is standby.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is structural representation of the present utility model；
Fig. 2 is diagrammatic cross-section of the present utility model.
Embodiment
Reference picture 1, Fig. 2, Fig. 1, Fig. 2 are the structural representations of one specific embodiment of the utility model, as illustrated, one
Kind fluid flow auto-control valve, including regulation and control valve body, the regulation and control valve body include valve body 101, flow information harvester
Structure, flow control device, fluid passage, the flow information collecting mechanism and Flow-rate adjustment machine are offered in the valve body 101
Structure is arranged in fluid passage.
As shown in Fig. 2 in the present embodiment, the fluid passage is through to the left side of valve body 101, stream by the right side of valve body 101
Body enters from the right side of valve body 101, is exported after flow information collecting mechanism, flow control device from the left side of valve body 101.
In the present embodiment, the flow information collecting mechanism preferably uses Hall sensor detection flows, certainly, is having
In body implementation process, can also the flowmeter of finished product be used to be connected on fluid hose, and the data detected are sent into regulating valve
Controller, Flow-rate adjustment valve module is controlled by governor valve control device.
As illustrated, the flow information collecting mechanism includes pole wheel 305, impeller 306, hall sensor component,
The impeller 306 is arranged in fluid passage, and the pole wheel 305 is rotatably arranged on the rear of impeller 306 and pole wheel 305
Axial direction and fluid flow direction it is in the same direction, and the passage that can be passed through for liquid is provided with the pole wheel 305, the Hall passes
Sensor component is arranged on valve body 101 and corresponding with pole wheel 305, liquid entrance in front of impeller 306, after impeller 306
Rotate and drive the rotation of pole wheel 305 to produce alternating magnetic field, the hall sensor component is able to detect that magnetic field becomes
Change frequency, and produce the pulse signal of a rule.
In the utility model, Hall sensor is a kind of magnetic field sensor made according to Hall effect, being capable of basis
The change in magnetic field produces induced-current, in the utility model, produces alternating magnetic field because pole wheel 305 rotates so that suddenly
Your sensor produces the induced-current of certain frequency, produces pulse signal.
Preferably, the pole wheel 305 is in crosswise, to form the passage that can be passed through for liquid.
Certainly, in specific implementation process, the pole wheel 305 can be arranged to it is three forked, five starlike etc., this
Outside, prismatic blade or helical blade can be also set on pole wheel 305, so that pole wheel 305 is with water flow rotary.
Further, the flow control device includes an electronic Flow-rate adjustment valve module and governor valve control device, described
Governor valve control device, which is connected with the hall sensor component and can adjusted according to the frequency signal of hall sensor component, to flow
The aperture of adjustable valve component, realizes Flow-rate adjustment.
Preferably, the Flow-rate adjustment valve module includes a valve element 204, rotary drive mechanism, and the valve element 204 is rotated and set
Put in fluid passage, and the outer wall of valve element 204 coordinates with fluid passage sealing, prevents to leak, the valve element 204 is laterally set
It is equipped with a limbers, what the rotary drive mechanism can rotate regulation limbers and fluid passage with movable valve plug 204 matches somebody with somebody close angle
Degree realizes aperture regulation.
Certainly, in specific implementation process, described Flow-rate adjustment valve module can also use ball valve, the angle valve of other structures
Deng can rotate the aperture of control valve, above-mentioned valve group is the upper common valve group of fluid control, is not described in detail here.
In addition, the Flow-rate adjustment valve module can also be plunger valve, pass through linear drive apparatus such as screw body, straight-line electric
Machine etc., aperture control can be carried out to plunger valve, while reach the function of Electronic control.
Preferably, the rotary drive mechanism is a steering wheel 201, is offered in the valve body 101 and is same as installing steering wheel 201
Cavity, and be provided with the cavity the upper lid 105 for positioning fixed steering wheel 201, the output axis connection of the steering wheel 201
To valve element 204.
Preferably, the steering wheel 201 can coordinate decelerator to be exported, to improve the precision of regulation.
Preferably, the upper lid 105 is fixed by screws on valve body 101, and being offered on upper lid 105 can be for steering wheel
The hole position that 201 wire or control line passes, to drive penetrating for wire rod.
In actual use, the governor valve control device internal memory contains the linear of changes of magnetic field frequency and uninterrupted relation
Data, the governor valve control device can receive the water temperature setting value of outside input and the fluctuation situation of hydraulic pressure and be set according to water temperature
Definite value and the fluctuation situation of hydraulic pressure formulate Flow modulation, and the governor valve control device is according to the pulse of hall sensor component
Frequency signal contrasts to obtain current traffic data with linear data, and by current traffic data with formulating Flow modulation pair
Than controlling Flow-rate adjustment valve module, when steering wheel 201 receives the Regulate signal of governor valve control device, meeting drive according to regulating command
Valve element 204 rotates, and so as to which the area between the limbers of adjusting spool 204 and valve body 101 has the function that current are adjusted, in theory can
Realize the runoff investigation of non-polarized.
In the present embodiment, above-mentioned control method is not described in detail here in electric control field more common.
In addition, the governor valve control device can realize regulation in real time according to the immediate feedback of hall sensor component.
Certainly, during specific implementation is described, the linear data of changes of magnetic field frequency and uninterrupted relation can pass through
System is learnt by oneself record or coordinated in other traffic monitoring equipment and records, and can also pass through manually rule of thumb data input.
In the present embodiment, it is preferred to use steering wheel 201, be different from traditional stepper motor, steering wheel internal independence is provided with
Angle position identification circuit plate, ensure that steering wheel walks accurate during work, to realize high-precision control, and in each work
When work starts, can all there is the action of auto zero position, to realize the calibration to motor zero-bit；Can be accurate by input pulse signal
Steering wheel is adjusted, control valve element 204 produces trickle rotation, realized to water-carrying capacity size adjustment control, the size and rudder of water-carrying capacity
Machine rotational angle is in simple linear relationship, realizes that water-carrying capacity linear regulation controls.
Rotating drive mechanism described in the utility model can be also conventional DC servo motor or AC servo motor, its turn
Angle control is conventional technology, is not described in detail here.
Described governor valve control device can be the combination of conventional PLC with servomotor/steering engine controller, or logical
A microprocessor while integrated flow computer servomotor/servos control function are crossed, is not described in detail here.
In the present embodiment, it is preferred to use operating angle is 90 ° or 180 ° of steering wheel, i.e. the angle range of steering wheel 201 is
0 ° to 90 ° or 0 ° to 180 °, you can realize control of the maximum flow of water amount to minimum water-carrying capacity, steering wheel turns to 90 degree, water valve from
Standard-sized sheet goes to minimum water-carrying capacity, certainly, in specifically implementation process, also from such as 85 °, 95 °, 175 ° etc. of other operating angles
Steering wheel, be not described in detail here.
In the present embodiment, the torsion of the steering wheel 201 is preferably 13 Kgf.cm (at 4.8V), under the torsion i.e.
Drive valve core rotation that can be smooth, torsion is too small to be occurred and rotates not smooth situation, and torsion is excessive, can increase the volume of steering wheel
And cost.Certainly, in specific implementation process, also from other torsion such as 5.7Kgf.cm (at 4.8V), 16 Kgf.cm (at
Steering wheel 4.8V) etc., is not described in detail here.
In the present embodiment, the operating voltage of the steering wheel 201 is preferably 5V, and steering wheel can be easy to and be adjusted using 5V power supplies
Electronic circuit on valve control shares same power supply, without additionally increasing new supply voltage, simplifies governor valve control device and supplies
The design of electric system.Certainly, in specific implementation process, other operating voltages such as 4.8V, 6.0V also can be selected, do not make herein in detail
State.
In the utility model, described steering wheel 201 can use digital rudder controller or simulated machine, in actual applications, mould
It is lower to intend steering wheel cost, and in the utility model, simulated machine can meet the needs of control, therefore it is preferred that using simulation electricity
Machine.
And traditional stepper motor water adjusting valve needs to be attached by 8 lines（5 line traffic control rotational angles, 3 line receiving poles
Extreme position signal）, adding 3 lines of flow information collecting mechanism, 11 lines of totally two rows, structure is complex, and cabling is also inconvenient,
And in the utility model, it is preferred to use 3 plus 3 liang of row's 6 lines connections, or the connection of single 4 line（Flow control device is adopted with flow information
Collecting mechanism utility power is just with power supply）, compared with 8 traditional line stepper motors, not only control accuracy is high, and structure is more simple
List, cabling are more convenient, meanwhile, the utility model is by using servos control, relative to traditional step motor control, cost
It is lower, failure is few, reaction is fast, noise is lower, control accuracy is higher.
Preferably, the top of valve element 204 is rotatably arranged on a collar 205, and the collar 205 is arranged on valve body 101
On, the bottom of steering wheel 201 is compacted on the collar 205 by upper lid 105.
Preferably, the output shaft end of the steering wheel 201 is in gear-like, the concave cylindrical cavity shape in the top of valve element 204, interior
Portion is in internal tooth colyliform, and the output shaft of steering wheel 201 and the spill position of valve element 204 are socketed tooth and be fitted together vertically, and formation is tightly sleeved
Connection, it is fricton-tight when ensureing to rotate to walk.
Preferably, the output shaft end of steering wheel 201 leaves gap with concave shaped cavity bottom, can not in order to avoid axially killing valve element 204
Rotate.
Preferably, valve core seal ring 206 is provided between valve element 204 and the collar 205 inwall, specifically, in valve element
Seal groove position is opened up on 204 perisporiums, valve core seal ring 206 is located on seal groove position, to ensure in the rotation process of valve element 204,
With good dynamic sealing performance, while have the effect for reducing rotary resistance concurrently.
Certainly, in specific implementation process, the seal groove position can be opened in ring set inwall, or in ring set inwall and valve element
Seal groove position is opened up on 204 perisporiums, multiple valve core seal rings 206 is installed, the effect of sealing can be strengthened.
Preferably, collar sealing ring 207 is provided between the outer wall of the collar 205 and valve body 101, specifically, valve body 101
Seal groove position is set with the joining part of the collar 205, the collar sealing ring 207 is arranged in seal groove position, realize the collar 205 with
Static water shutoff effect between valve body 101.
Certainly, in specific implementation process, described seal groove position can be opened on the collar 205, or in valve body 101 and set
Seal groove position is respectively provided with ring 205, the collar sealing ring 207 may be configured with multiple, to be sealed with enhancing effects.
Preferably, an impeller sleeve 303 is configured with the fluid passage, the impeller 306 is fixed and is located at the impeller set
In cylinder 303, specifically, the impeller sleeve 303 is positioned by buckle structure, prevent it from being relatively rotated with valve body 101.
In addition, the impeller sleeve 303 can be also fixed in fluid passage by modes such as screens, screw threads.
Preferably, a rotor sleeve 304 is configured with the fluid passage, the rear end of rotor sleeve 304 is provided with one
Swivel base 307, the passage passed through for liquid is opened up on swivel base 307, the both ends of pole wheel 305 are respectively arranged with rotating shaft, swivel base
There is interval corresponding with pole wheel 305, the swivel base 307 on impeller 306 with being respectively arranged between 307 and impeller 306
The axis hole coordinated with the both ends rotating shaft of pole wheel 305 so that pole wheel 305 is rotatably arranged on therebetween.
Preferably, the rotor sleeve 304 is positioned in fluid passage by buckle structure, prevents it from rotating, and is protected
Demonstrate,prove the reliability of mechanism.
Further, a steel ball 308, shaft end and the steel ball 308 of pole wheel 305 are configured with the axis hole of the swivel base 307
Contact, the shaft end of pole wheel 305 is avoided directly to contradict in the axis hole bottom of swivel base 307, to reduce the frictional resistance rotated.
In addition, the rotor sleeve 304 can be also fixed in fluid passage by modes such as screens, screw threads.
Preferably, it is a hall circuitboard 31 that the hall sensor component, which includes, and the hall circuitboard 31 is fixed on
On valve body 101, and the hall circuitboard 31 is located at the top of the center of pole wheel 305, valve body 101 be provided with suddenly
Wire hole corresponding to your circuit board 31, to connect data wire output.
In specific implementation process, impeller 306 directly can be fixed in fluid passage, and the swivel base 307 also can be with valve
Body 101 sets and is structure as a whole, and impeller 306 individually rotates also may be used in swivel base 307.
Preferably, the output shaft of steering wheel 201, the collar 205, valve element 204 keep the alignment of height, are turned with reducing in regulation
During dynamic, because not producing the rotary resistance of radial direction coaxially, ensure the precision of regulation.
Preferably, the pivot center of pole wheel 305 is arranged at the axial location of fluid passage, further reduces and turn
Dynamic resistance.
Above to it is of the present utility model preferably implement illustrated, certainly, the utility model can also use with
The different form of above-mentioned embodiment, what those skilled in the art were made on the premise of without prejudice to spirit of the invention etc.
Same conversion or corresponding change, should all belong in the scope of protection of the utility model.
Claims (10)
1. a kind of fluid flow auto-control valve, including regulation and control valve body, it is characterised in that：The regulation and control valve body includes valve body
(101), flow information collecting mechanism, flow control device, the valve body (101) is interior to offer fluid passage, the flow letter
Breath collecting mechanism and flow control device are arranged in fluid passage；
The flow control device includes an electronic Flow-rate adjustment valve module and governor valve control device, the governor valve control device
It is connected with flow information collecting mechanism and being capable of opening according to the Signal Regulation Flow-rate adjustment valve module of flow information collecting mechanism
Degree.
A kind of 2. fluid flow auto-control valve according to claim 1, it is characterised in that：The flow information harvester
Structure includes pole wheel (305), impeller (306), hall sensor component, and the impeller (306) is arranged in fluid passage, institute
State pole wheel (305) and be rotatably arranged on impeller (306) rear, and be provided with the pole wheel (305) can be for liquid
The passage passed through, the hall sensor component are arranged on valve body (101) and corresponding with pole wheel (305), and liquid is from leaf
Take turns and enter in front of (306), rotated after impeller (306) and drive pole wheel (305) rotation to produce alternating magnetic field, it is described
Hall sensor component is able to detect that changes of magnetic field frequency.
A kind of 3. fluid flow auto-control valve according to claim 1, it is characterised in that：The Flow-rate adjustment valve module
Including valve element (204), rotary drive mechanism, the valve element (204) is rotatably arranged in fluid passage, and valve element (204) outer wall
Seal and coordinate with fluid passage, the valve element (204) is laterally disposed a limbers, and the rotary drive mechanism can drive valve
Core (204) rotates regulation limbers and the fit angle of fluid passage realizes aperture regulation.
A kind of 4. fluid flow auto-control valve according to claim 3, it is characterised in that：The rotary drive mechanism is
One steering wheel (201), the valve body (101) is interior to be offered for installing the cavity of steering wheel (201), and is provided with use on the cavity
In the upper lid (105) of the fixed steering wheel (201) of positioning, the output of the steering wheel (201) is pivotally connected to valve element (204).
A kind of 5. fluid flow auto-control valve according to claim 4, it is characterised in that：The steering wheel (201) turns
Angular region is 0 ° to 180 °.
A kind of 6. fluid flow auto-control valve according to claim 4, it is characterised in that：The torsion of the steering wheel (201)
Power is 2Kgf.cm to 32Kgf.cm.
A kind of 7. fluid flow auto-control valve according to claim 4, it is characterised in that：The work of the steering wheel (201)
It is 3.0V to 7.4V to make voltage range.
A kind of 8. fluid flow auto-control valve according to claim 3, it is characterised in that：Valve element (204) top
It is rotatably arranged on a collar (205), the collar (205) is arranged on valve body (101).
A kind of 9. fluid flow auto-control valve according to claim 8, it is characterised in that：The valve element (204) and set
Valve core seal ring (206) is provided between ring (205) inwall.
A kind of 10. fluid flow auto-control valve according to claim 8, it is characterised in that：The collar (205) outer wall
Collar sealing ring (207) is provided between valve body (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720430926.3U CN207064806U (en) | 2017-04-21 | 2017-04-21 | A kind of fluid flow auto-control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720430926.3U CN207064806U (en) | 2017-04-21 | 2017-04-21 | A kind of fluid flow auto-control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207064806U true CN207064806U (en) | 2018-03-02 |
Family
ID=61501501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720430926.3U Active CN207064806U (en) | 2017-04-21 | 2017-04-21 | A kind of fluid flow auto-control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207064806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091364A (en) * | 2017-04-21 | 2017-08-25 | 佛山市顺德区锜科电子科技有限公司 | A kind of fluid flow auto-control valve |
-
2017
- 2017-04-21 CN CN201720430926.3U patent/CN207064806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091364A (en) * | 2017-04-21 | 2017-08-25 | 佛山市顺德区锜科电子科技有限公司 | A kind of fluid flow auto-control valve |
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