CN112651114A - Guide cover with guide vanes and hydraulic design method thereof - Google Patents
Guide cover with guide vanes and hydraulic design method thereof Download PDFInfo
- Publication number
- CN112651114A CN112651114A CN202011514679.8A CN202011514679A CN112651114A CN 112651114 A CN112651114 A CN 112651114A CN 202011514679 A CN202011514679 A CN 202011514679A CN 112651114 A CN112651114 A CN 112651114A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- guide
- inlet
- impeller
- determining
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004323 axial length Effects 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 17
- 238000003756 stirring Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Computer Hardware Design (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides a guide cover with guide vanes and a hydraulic design method thereof, which comprises the following steps of arranging guide vanes in a guide cover shell of the guide cover; the main geometric parameters of the air guide sleeve and the guide vane thereof can be determined, including the inlet placing angle alpha of the guide vane3Angle of exit of guide vane4The guide vane height h, the guide vane axial length L, the guide vane diameter d, the guide vane axial length L and the guide vane number z enable original spiral motion to be better converted into required axial motion, meanwhile, through fluid after the guide vane, kinetic energy is reduced, pressure energy is increased, and better system provision is achievedThe power is circulated, and the overall working efficiency of the stirrer is improved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a guide cover with guide vanes and a hydraulic design method thereof.
Background
In the field of sewage treatment, submersible mixers are commonly used to power the mixing, agitation and circulation of sewage. After the fluid is ejected from the impeller, the fluid moves forward in axial direction and in spiral motion, so that the fluid flow after being stirred by the stirrer moves spirally forward. And for cases where only axial movement is required to drive the cycle, the addition of a pod is required.
The kuppe is installed and is used for strengthening the important accessory of water conservancy diversion effect on the mixer, and conventional kuppe is mostly funnel cylindrical. After passing through the cylindrical flow guide sleeve, the fluid can flow along the axial direction. And that part of the energy of the winding movement is consumed.
Disclosure of Invention
Aiming at the technical problem, the invention provides a guide cover with guide vanes and a hydraulic design method thereof, wherein the guide vanes are arranged in an inlet of a guide cover shell of the guide cover; the main geometric parameters of the air guide sleeve and the guide vane thereof can be determined, including the inlet placing angle alpha of the guide vane3Angle of exit of guide vane4The utility model discloses a fluid mixing machine, including stator, guide vane height h, guide vane axial length L, kuppe diameter d, kuppe axial length L, stator quantity z, make original helical motion can be better with the transition of the convoluteing motion conversion of fluid to axial motion, be used for eliminating the velocity ring volume of fluid after the stirring, turn into the kinetic energy of fluid medium's circumferential speed into pressure energy, simultaneously, fluid after the guide vane, kinetic energy reduces, the pressure energy increases, can be better for the system provides circulation power, improve the holistic work efficiency of mixer.
The technical scheme of the invention is as follows: a method for designing a guide vane-carrying flow guide sleeve hydraulically comprises the following steps:
a guide vane is arranged in a guide cover shell of the guide cover;
determining an inlet placement angle of the guide vane:
in the formula:
α3-the guide vane inlet lay angle is in degrees;
α3' -inlet flow angle, in degrees;
Δ α — angle of attack, in degrees;
vm3-guide vane inlet axial plane velocity in m/s;
vu3-the guide vane inlet circumferential speed in m/s;
vm2-the exit circumference of the impeller blades has a component velocity in m/s;
ψ3-impeller blade inlet crowd factor;
D3-calculating the inlet diameter of the flow surface in m;
dh-hub diameter in m;
h-head, unit m;
u-impeller speed, unit m/s;
ηh-efficiency, in units;
n is the rotation speed, unit r/min;
t3-impeller blade intercept, in m;
su3-the guide vane inlet circumferential thickness in m;
s3-flow surface thickness in m at the inlet calculation point of the guide vane;
determining an outlet setting angle alpha of the guide vane (6)4：
α4＝80°～90°。
In the above solution, the method further comprises the step of determining the axial length l of the guide vane:
l＝(0.5～0.7)D2，
in the formula: d2-impeller rim diameter.
In the above solution, the method further includes the step of determining the blade height h of the guide vane:
in the above solution, the method further includes the step of determining the diameter d of the pod:
the diameter D of the air guide sleeve is larger than the diameter D of the edge of the impeller2：d＝(1.2～1.5)D2。
In the above solution, the method further comprises the step of determining the number of blades of the guide vane:
let the number of the guide vanes be Z, the number of the impeller vanes be Z, and the Z and the Z are required to be relatively prime, and
in the above solution, the method further includes the step of determining a distance S between the inlet end of the guide vane and the outlet end of the impeller blade:
S＝(0.1-0.15)D2。
in the above scheme, the method further comprises determining a distance l between the inlet of the air guide sleeve and the impeller1The steps of (1):
l1＝(1.2-1.6)D2。
in the above solution, the method further includes the step of determining the axial length L of the nacelle:
L＝l+S+m+l1
in the formula:
m is the axial width of the impeller blade.
l1-the distance of the pod inlet from the impeller.
A guide cover with guide vanes is designed according to a guide cover hydraulic design method with guide vanes.
Compared with the prior art, the invention has the beneficial effects that: the guide vanes are additionally arranged in the guide cover, so that the motion rule of fluid from the impeller of the stirring machine is better met, the original spiral motion can be better converted into the required axial motion, meanwhile, the kinetic energy of the fluid passing through the guide vanes is reduced, the pressure energy is increased, the circulating power can be better provided for the system, and the integral working efficiency of the stirring machine is improved. By the calculation method of the invention, stirring can be carried outThe parameters of the machine determine the main geometric parameters of the guide cover and the guide vane thereof, including the inlet setting angle alpha of the guide vane3Angle of exit of guide vane4The guide vane height h, the guide vane axial length L, the guide vane diameter d, the guide vane axial length L and the guide vane number z can be designed according to actual working conditions, and the overall working efficiency of the stirring machine is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a bottom view of an embodiment of the present invention.
Fig. 3 is a velocity flow field profile of an embodiment of the present invention.
In the figure: 1-submersible mixer, 2-guide cover fixing support, 3-pump shaft, 4-impeller, 5-guide cover shell and 6-guide vane.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A method for designing a guide vane-carrying flow guide sleeve hydraulically comprises the following steps:
fig. 1 and 2 show a preferred embodiment of the vaned pod comprising a submersible mixer 1, pod mounting bracket 2, pump shaft 3, impeller 4 and pod housing 5; a guide vane 6 is arranged in a guide cover shell 5 of the guide cover;
preferably, the design working condition flow Q is 350L/s, the head H is 6.72m, the rotating speed is 1450r/min, the number of blades of the impeller is 7, and the diameter d of the hub ish134mm, 292mm inlet diameter-hThe axial width m of the blade is 54mm, which is 0.88.
Preferably, the guide vane inlet placement angle α is determined by specifying the following relations3Angle of exit of guide vane4The height h of the guide vane, the axial length L of the guide vane, the diameter d of the guide cover, the axial length L of the guide cover, the number z of the guide vanes:
determining the inlet placement angle of the guide vane 6:
in the formula:
α3-the guide vane inlet lay angle is in degrees;
α3′——inlet flow angle, in degrees;
Δ α — angle of attack, in degrees;
vm3-guide vane inlet axial plane velocity in m/s;
vu3-the guide vane inlet circumferential speed in m/s;
vm2-the exit circumference of the impeller blades has a component velocity in m/s;
ψ3-impeller blade inlet crowd factor;
D3-calculating the inlet diameter of the flow surface in m;
dh-hub diameter in m;
h-head, unit m;
u-impeller speed, unit m/s;
ηh-efficiency, in units;
n is the rotation speed, unit r/min;
t3-impeller blade intercept, in m;
su3-the guide vane inlet circumferential thickness in m;
s3-flow surface thickness in m at the inlet calculation point of the guide vane;
determining the outlet setting angle alpha of the guide vane 64：
α4＝80°～90°。
Determining the axial length l of the guide vane 6:
l＝(0.5～0.7)D2，
in the formula: d2-impeller rim diameter.
Determining the blade height h of the guide vane 6:
determining the diameter d of the air guide sleeve:
the diameter D of the air guide sleeve is larger than the diameter D of the edge of the impeller2：d＝(1.2～1.5)D2。
In the above solution, the method further comprises the step of determining the number of blades of the guide vane 6:
let the number of the guide vanes 6 be Z, the number of the impeller vanes be Z, and the Z and Z are required to be relatively prime, and
determining the distance S between the inlet end of the guide vane 6 and the outlet end of the impeller blade:
S＝(0.1-0.15)D2。
determining a distance l of the nacelle inlet from the impeller1The steps of (1):
l1＝(1.2-1.6)D2。
determining the axial length L of the air guide sleeve:
L＝l+S+m+l1
in the formula: m is the axial width of the impeller blade.
Calculating to obtain:
α3＝64.63
α4＝90°
h＝125mm
l＝128.15mm
d＝380mm
L＝532.15mm
z＝8。
the invention provides a guide cover structure with guide vanes, and hydraulic design is carried out on the guide vanes of the guide cover by adopting an accurate formula design method. The effective propelling distance of a submersible mixer with a common guide vane is 12 meters, and the effective radial diffusion distance is 2 meters, after the guide vane is transformed and installed on the guide vane-provided guide vane, the effective propelling distance is 15 meters, and the effective radial diffusion distance is 2 meters. Therefore, the guide vanes can effectively increase the axial propelling distance of the submersible mixer. The utilization rate and the utilization efficiency of the water flow at the outlet of the impeller of the stirrer are improved, and the economic benefit is good.
As shown in fig. 3, the left side is the velocity flow field distribution diagram of the fluid at the outlet of the impeller of the submersible mixer with the conventional air guide sleeve, and the right side is the velocity flow field distribution diagram of the fluid at the outlet of the impeller after the air guide sleeve with the guide vanes designed according to the invention is installed. Through comparison, the axial speed of the fluid is obviously increased and the axial propelling distance is obviously improved after the guide sleeve with the guide vanes is installed.
The invention also provides the guide cover with the guide vane, and the guide cover is designed according to the guide cover with the guide vane hydraulic design method.
The guide vanes are additionally arranged in the guide cover, so that the motion rule of fluid from the impeller of the stirring machine is better met, the original spiral motion can be better converted into the required axial motion, meanwhile, the kinetic energy of the fluid passing through the guide vanes is reduced, the pressure energy is increased, the circulating power can be better provided for the system, and the integral working efficiency of the stirring machine is improved. By the calculation method, the main geometric parameters of the air guide sleeve and the guide vane thereof can be determined according to the parameters of the stirrer, including the arrangement angle alpha of the inlet of the guide vane3Angle of exit of guide vane4The guide vane height h, the guide vane axial length L, the guide vane diameter d, the guide vane axial length L and the guide vane number z can be designed according to actual working conditions, and the overall working efficiency of the stirring machine is improved.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for designing a guide vane-carrying flow guide sleeve by water power is characterized by comprising the following steps:
a guide vane (6) is arranged in the air guide sleeve shell (5) of the air guide sleeve;
determining an inlet placement angle of the guide vane (6):
in the formula:
α3-the guide vane inlet lay angle is in degrees;
α3' -inlet flow angle, in degrees;
Δ α — angle of attack, in degrees;
vm3-guide vane inlet axial plane velocity in m/s;
vu3-the guide vane inlet circumferential speed in m/s;
vm2-the exit circumference of the impeller blades has a component velocity in m/s;
ψ3-impeller blade inlet crowd factor;
D3-calculating the inlet diameter of the flow surface in m;
dh-hub diameter in m;
h-head, unit m;
u-impeller speed, unit m/s;
ηh-efficiency, in units;
n is the rotation speed, unit r/min;
t3-impeller blade intercept, in m;
su3-the guide vane inlet circumferential thickness in m;
s3-flow surface thickness in m at the inlet calculation point of the guide vane;
determining an outlet setting angle alpha of the guide vane (6)4：
α4＝80°～90°。
2. The method of hydraulic design of a vaned dome according to claim 1, further comprising the step of determining the axial length/of the vane (6):
l＝(0.5～0.7)D2，
in the formula: d2-impeller rim diameter.
3. The method of hydraulic design of a vaned dome according to claim 2, further comprising the step of determining the blade height h of the vane (6):
4. the method of hydraulic design of a vaned nacelle according to claim 2, further comprising the step of determining a nacelle diameter d:
the diameter D of the air guide sleeve is larger than the diameter D of the edge of the impeller2：d＝(1.2～1.5)D2。
5. The method of hydraulic design of a vaned dome according to claim 1, further comprising the step of determining the number of blades of the vane (6):
let the number of the guide vanes (6) be Z, the number of the impeller vanes be Z, and the Z and the Z are required to be coprime, and
6. the method of hydraulic design of a vaned dome according to claim 2, further comprising the step of determining the distance S between the inlet end of the vane (6) and the outlet end of the impeller blade:
S＝(0.1-0.15)D2。
7. the method of hydraulic design for a vaned nacelle of claim 2, further comprising determining a distance/, from the nacelle inlet to the impeller, of the nacelle inlet1The steps of (1):
l1＝(1.2-1.6)D2。
8. the method of hydraulic design of a vaned nacelle according to claim 7, further comprising the step of determining the nacelle axial length L:
L＝l+S+m+l1
in the formula: m is the axial width of the impeller blade.
9. A vaned pod, characterized in that it is designed according to the method of hydraulic design of a vaned pod according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011514679.8A CN112651114B (en) | 2020-12-18 | 2020-12-18 | Guide hood with guide vanes and hydraulic design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011514679.8A CN112651114B (en) | 2020-12-18 | 2020-12-18 | Guide hood with guide vanes and hydraulic design method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112651114A true CN112651114A (en) | 2021-04-13 |
| CN112651114B CN112651114B (en) | 2024-05-14 |
Family
ID=75358650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011514679.8A Active CN112651114B (en) | 2020-12-18 | 2020-12-18 | Guide hood with guide vanes and hydraulic design method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112651114B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049770A (en) * | 2021-06-02 | 2021-06-29 | 碧兴物联科技(深圳)股份有限公司 | Computing method, device, equipment and storage medium for water quality on-line monitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205895688U (en) * | 2016-08-16 | 2017-01-18 | 台州锦霸工贸有限公司 | Impeller subassembly for well in immersible pump |
| CN208565074U (en) * | 2017-12-29 | 2019-03-01 | 广州市洛森通风设备制造有限公司 | A kind of centrifugal blower with guide vane and radome fairing |
| CN210461092U (en) * | 2019-07-18 | 2020-05-05 | 汉能（天津）工业泵有限公司 | Ultra-light large-flow submersible axial-flow pump |
-
2020
- 2020-12-18 CN CN202011514679.8A patent/CN112651114B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205895688U (en) * | 2016-08-16 | 2017-01-18 | 台州锦霸工贸有限公司 | Impeller subassembly for well in immersible pump |
| CN208565074U (en) * | 2017-12-29 | 2019-03-01 | 广州市洛森通风设备制造有限公司 | A kind of centrifugal blower with guide vane and radome fairing |
| CN210461092U (en) * | 2019-07-18 | 2020-05-05 | 汉能（天津）工业泵有限公司 | Ultra-light large-flow submersible axial-flow pump |
Non-Patent Citations (1)
| Title |
|---|
| 肖钢等: "水泵及水泵站习题实验课程设计指导书", 武汉大学出版社, pages: 168 - 170 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049770A (en) * | 2021-06-02 | 2021-06-29 | 碧兴物联科技(深圳)股份有限公司 | Computing method, device, equipment and storage medium for water quality on-line monitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112651114B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5009816A (en) | Broad liquid level gas-liquid mixing operations | |
| CN104776050B (en) | A kind of impeller for double suction centrifugal pump and volute chamber guiding device | |
| JP4050324B2 (en) | Low head pump equipment for fish farms | |
| CN112651114A (en) | Guide cover with guide vanes and hydraulic design method thereof | |
| CN206681996U (en) | One kind filtering stirred type Sand pump | |
| US9022732B2 (en) | Concrete volute pump | |
| CN101918121B (en) | Mixer assembly and method for flow control in a mixer assembly | |
| CN108547794A (en) | A kind of fire-fighting high-speed centrifugal pump | |
| CN103743257B (en) | Efficient hydrodynamic cooling tower | |
| CN105805044B (en) | Log spiral guide vane and its design method of the one seed nucleus main pump with deviated splitter vane | |
| WO2010009629A1 (en) | A hydrodynamic cooling fan for a cooling tower with high efficiency and saving-energy | |
| EP3642475B1 (en) | Vortex generator | |
| CN207809743U (en) | propeller duct and propeller | |
| CN102359454A (en) | Design method for cutting performance of inclined flow pump impeller | |
| CN206221284U (en) | Double feed inlet guide-vane horizontal space multi-stage centrifugal pump | |
| CN103982460A (en) | Hydraulic design method for gas-fluid two-phase mixture pump | |
| CN103244440B (en) | Hydrodynamic(al) wind power thruster and cooling tower wind power system | |
| CN213160466U (en) | Stirred tank of antifreeze production usefulness | |
| CN102351332A (en) | Submersible aerator | |
| CN110081017B (en) | Impeller of submersible sewage pump | |
| CN210564866U (en) | Water turbine and cooling tower and cooling system with same | |
| CN213669277U (en) | Ternary catalysis cleaner production facility | |
| CN206478011U (en) | A kind of electronic work water pump is with ultralow specific revolution hydraulic model | |
| CN218530486U (en) | Stirring rake and extraction equipment | |
| CN2828028Y (en) | Integral impeller |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |