CN115342869A - Wide-range Karman vortex street flow metering device system - Google Patents
Wide-range Karman vortex street flow metering device system Download PDFInfo
- Publication number
- CN115342869A CN115342869A CN202210704664.0A CN202210704664A CN115342869A CN 115342869 A CN115342869 A CN 115342869A CN 202210704664 A CN202210704664 A CN 202210704664A CN 115342869 A CN115342869 A CN 115342869A
- Authority
- CN
- China
- Prior art keywords
- karman vortex
- electric valve
- flow
- vortex street
- range
- 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.)
- Withdrawn
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005457 optimization Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- G01F1/20—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 by detection of dynamic effects of the flow
- G01F1/32—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 by detection of dynamic effects of the flow using swirl flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
Abstract
The invention discloses a wide-range Karman vortex street flow metering device system which structurally comprises 1 upstream joint, 1 lower joint, 1 main pipeline and N parallel branch pipelines consisting of a plurality of auxiliary pipelines, 1 data processing unit and N \ geq2; the main pipeline is provided with 1 electric valve and 1 Karman vortex shedding flowmeter; each auxiliary pipeline is provided with 1 electric valve, and each auxiliary pipeline is internally provided with 1 choking body; when all the electric valves are completely opened, the through-flow areas formed by the upstream joints, the lower joints and the N parallel branch pipelines are in rotational symmetry of N orders; and the data processing unit controls the opening and closing of each electric valve by adopting a preferred control method. Compared with the prior art, the equipment has the beneficial effects that: 1. the control conditions of the optimal control method are simple and clear, and the software complexity and the hardware cost are beneficially reduced; 2. the upper limit of the measuring range of the Karman vortex flowmeter of the main pipeline is multiplied, and the precision is not influenced.
Description
Technical Field
The invention belongs to the technical field of flow meters, and relates to a wide-range Karman vortex street flow metering device system.
Background
In the world, people have more and more extensive requirements on high-precision measurement, such as automatic control of a pipeline system and the precision measurement of a plurality of flow metering nodes; on the other hand, a small deviation in the measurement accuracy of the pipeline fluid will result in a large economic loss. Therefore, the development of a high-reliability, high-precision and wide-range flow detection method and device has important significance.
The Karman vortex street flowmeter is a new type of flowmeter developed in the last 70 th century, uses vortex frequency f as a sensing signal of flow field characteristic velocity v, and is increasingly wide in many fields due to the advantages of wide applicable fluid type, wide measuring range, high precision, small flow resistance and the like. The measuring principle of the Karman vortex street flowmeter is briefly described as follows, according to the Karman vortex street theory, the vortex frequency f at the downstream of a vortex street generator and the characteristic velocity v of a flow field have the following relations:
wherein d is the characteristic length of the vortex street generator, S t Strouhal number, S t Is a dimensionless number. From this, the instantaneous volume flow Q can be obtained V Comprises the following steps:
wherein D is the hydraulic diameter of the through-flow section at the detection position of the Karman vortex shedding flowmeter, and can be known from the above formula S t At constant, for a certain pipe, the flow rate Q V Linearly proportional to the vortex frequency f.
However, according to the Struhal number S t Not practically constant, only at Reynolds number R e Within a specific interval of (1), S t The approximation can be considered constant; the Reynolds number R e In relation to the geometrical characteristics of said vortex street generator, for a cylindrical vortex street generator, experiments have shown that in R e In the approximate range of 300-200000, S t Maintaining a constant value of about 0.20; when R is e =330000-350000, the supercritical range is reached, after which the cylindrical wake vortex is completely turbulent and regular vortex shedding no longer exists. Therefore, for using a circleThe Reynolds number Re corresponding to the high-precision range of the vortex street flowmeter of the cylindrical vortex street generator is in the approximate range of 300-200000, and the Reynolds number Re is along with S t The deviation gradually becomes 0.20, and the accuracy of the Karman vortex street flow is obviously reduced; this fundamentally has restricted karman vortex street flow meter's measuring range scope. Currently, some manufacturers have adopted S for different Reynolds number sections t The detection range of the Karman vortex street flowmeter is expanded to a certain extent by technical measures such as sectional compensation and the like.
The invention provides a wide-range Karman vortex street flow metering device system, wherein N parallel branch pipelines form a through-flow space with N-order rotational symmetry, each parallel branch pipeline has identical fluid mechanics characteristics, and the invention provides an electric valve optimal selection control method of the parallel branch pipelines.
The invention relates to a system for metering the flow of a karman vortex street, which mainly has the beneficial effects that: 1. the upper limit of the measuring range of the Karman vortex flowmeter on the main pipeline is multiplied by N times at most, and the flow metering precision is not influenced completely; 2. the optimal control method has simple and clear control conditions and is beneficial to reducing the realization cost of software and hardware of corresponding control equipment.
Disclosure of Invention
The invention discloses a wide-range karman vortex street flow metering device system, and aims to realize a karman vortex street flow metering technology with a large range and high precision.
The wide-range Karman vortex street flow metering device system is structurally characterized in that: the structure of the device comprises 1 upstream joint, 1 lower joint, N parallel branch pipelines between the upstream joint and the lower joint and 1 data processing unit, wherein N is more than or equal to 2; the upstream joint is connected with an upstream pipeline; the downstream joint is connected with a downstream pipeline; except 1 main pipeline for measuring flow, all the N parallel branch pipelines are auxiliary pipelines for adjusting flow; the main pipeline is provided with 1 electric valve and 1 Karman vortex shedding flowmeter; each auxiliary pipeline is provided with 1 electric valve, and each auxiliary pipeline is internally provided with 1 choking body; the Karman vortex street flowmeter of the main pipeline has a vortex street generator and the choke body which are the same parts; the data processing unit can exchange data with the Karman vortex shedding flowmeter and control the opening degree of each electric valve;
the central lines of the upstream joint and the lower joint are positioned on the same straight line; when all the electric valves are completely opened, the through-flow areas formed by the upstream joints, the lower joints and the N parallel branch pipelines are in rotational symmetry relative to a straight line where the center line is located, and the order of the rotational symmetry is N; the opening degree of M electric valves of the N electric valves is not zero, M is more than or equal to 0 and less than or equal to N, and the opening degrees of the M electric valves are the same under any condition.
Flow Q of the main pipeline 1 The displayed flow Q of the Karman vortex street flowmeter 2 Satisfy Q 2 ＝M×Q 1 ，Q 2 The upper limit of the high-precision range of the wide-range karman vortex street flow metering device system is M times of the upper limit of the range of the karman vortex street flow meter on the main pipeline, and the maximum value of M is N. The high-precision range is the Strouhal number S of the Karman vortex shedding flowmeter on the main pipeline t The invention defines that the value of the constant can be regarded as: the high-precision measuring range of the Karman vortex shedding flowmeter and the measuring range of the instantaneous flow measurement relative error delta less than 5 percent.
The data processing unit adopts a preferred control method that: the opening value of each electric valve can only be 0 or 1, the opening of the electric valve is 0 to represent complete closing, the opening of the electric valve is 1 to represent complete opening, the serial number of the main pipeline electric valve is 1, the serial number of the auxiliary pipeline electric valve is i, and i is more than or equal to 2 and is less than or equal to N; the data processing unit adopts a preferred control method to control the opening degree of each electric valve, and the preferred control method is characterized by comprising the following steps: the Karman vortex street flowmeter has a preset measuring range of (Q) 11 ，Q 12 ) (ii) a Any No. i electric valve with the opening degree from 0 to 1 as the main control conditionPipe flow Q 1 ＞Q 12 The opening degree of the valve with the serial number less than i is 1; any No. i electric valve has the control condition that the opening degree is from 1 to 0 as Q 1 ×i＜Q 12 (i-1) and the valve opening degree with the serial number larger than i is 0; the wide-range Karman vortex street flow metering device system has the range of (Q) 11 ，N×Q 12 ). The optimal control method adopted by the data processing unit has the characteristic of simple and clear algorithm, is beneficial to reducing the complexity of corresponding control software and the operation amount of software operation, further reduces the minimum performance requirement of hardware, and reduces the overall implementation and production cost.
The invention relates to a system for metering the flow of a karman vortex street, which mainly has the beneficial effects that: 1. the upper limit of the measuring range of the Karman vortex street flowmeter on the main pipeline is multiplied by N times at most, and the flow metering precision is not influenced completely; 2. the optimal control method has simple and clear control conditions and is beneficial to reducing the realization cost of software and hardware of corresponding control equipment.
Drawings
Fig. 1 is a schematic structural diagram of a karman vortex street flow metering device system according to embodiment 1 of the present invention.
FIG. 2 is a schematic diagram showing the relationship between St values and measuring ranges of a Karman vortex street flowmeter of a cylindrical vortex street generator.
Fig. 3 is an exemplary diagram illustrating the control effect of the preferred control method.
In fig. 1: 11 is the upstream connection, 12 is the downstream connection, 13 is the main pipeline, 14 and 15 are auxiliary pipes, 131 is the electrically operated valve of main pipeline 13, 141 is the electrically operated valve of auxiliary pipeline 14, 151 is the electrically operated valve of auxiliary pipeline 15, 132 is the karman vortex flowmeter of main pipeline 13, 1321 is the vortex generator of 13, 142 is the same bluff body as 13 installed in auxiliary pipeline 14, 152 is the same bluff body as 13 installed in auxiliary pipeline 15.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings:
the invention discloses a wide-range karman vortex street flow metering device system, and aims to realize a karman vortex street flow metering technology with a large range and high precision.
Fig. 1 is a schematic structural diagram of a karman vortex street flow metering device system according to embodiment 1 of the present invention, where in fig. 1: 11 is an upstream joint, 12 is a downstream joint, 13 is a main pipeline, 14 and 15 are auxiliary pipelines, 131 is an electric valve of the main pipeline 13, 141 is an electric valve of the auxiliary pipeline 14, 151 is an electric valve of the auxiliary pipeline 15, 132 is a karman vortex shedding flowmeter of the main pipeline 13, 1321 is a vortex shedding generator of 13, 142 is a fluid resistor which is the same as 13 and is installed on the auxiliary pipeline 14, and 152 is a fluid resistor which is the same as 13 and is installed on the auxiliary pipeline 15.
The wide-range Karman vortex street flow metering device system comprises an upstream joint, a lower joint, 3 parallel branch pipelines and 1 data processing unit, wherein the upstream joint is connected with the lower joint; of the 3 parallel branch pipelines, 1 branch pipeline is a main pipeline, and the rest 2 branch pipelines are auxiliary pipelines; the main pipeline is provided with 1 electric valve and 1 Karman vortex shedding flowmeter; the 2 auxiliary pipelines are respectively provided with 1 electric valve, and the 2 auxiliary pipelines are respectively provided with 1 choking body; the flow blocking body is the same as a vortex street generator of the Karman vortex street flowmeter; the data processing unit can exchange data with the Karman vortex shedding flowmeter and control the opening degree of each electric valve; the central lines of the upstream joint and the lower joint are collinear; when all the electric valves are completely opened, the flow-through area formed by the upstream joint, the lower joint and the 3 parallel branch pipelines is in 3-order rotational symmetry about a straight line where the center line is located.
In the karman vortex street flow metering device system in the embodiment 1 of the invention, the number of the electric valves with the opening not being zero of 3 electric valves is marked as M, M is more than or equal to 0 and less than or equal to 3, and the opening of the M electric valves is the same under any condition; flow Q of the main pipeline 1 The displayed flow Q of the Karman vortex street flowmeter 2 Satisfy Q 2 ＝M×Q 1 ，Q 2 The total through-flow of a wide-range karman vortex street flow metering device system, therefore, the upper limit of the high-precision range of the embodiment 1 of the invention is M times of the upper limit of the range of the karman vortex street flow meter on the main pipeline,the max value of M is 3.
FIG. 2 is a schematic diagram showing the relationship between the St value and the measuring range of the Karman vortex street flowmeter of the cylindrical vortex street generator. According to the karman vortex street theory, the vortex frequency f at the downstream of the vortex street generator and the characteristic velocity v of the flow field have the following relations:
thus, the instantaneous volume flow Q can be obtained V Comprises the following steps:
from the above formula, in S t At constant, for a certain pipe, the flow rate Q V Linearly proportional to the vortex frequency f, and therefore only at S t A karman vortex shedding flowmeter can only be applied to a specific reynolds number interval with an approximate constant. FIG. 2 is a schematic diagram showing the relationship between St values and measuring ranges of a Karman vortex-shedding flowmeter of a cylindrical vortex-shedding generator, wherein R corresponds to the high-precision measuring range of the Karman vortex-shedding flowmeter of the cylindrical vortex-shedding generator e In the approximate range of 300-200000, corresponding to S t 0.2. The Reynolds number intervals of the St constant values of the vortex street generators with different geometric characteristics are generally different; however, for a certain vortex street generator, the reynolds number interval of the value of the St constant is fixed, and the specific value can be determined by experiments.
The control effect of the preferred control method described in fig. 3 is an illustrative diagram to aid in understanding the preferred control method of the present invention. FIG. 3 illustrates the flow rate Q 2 Starting from 0, the control process under the working condition of constant-speed increase is as follows: under the control of the optimal control method, N =5 is adopted in the wide-range Karman vortex street flow metering device system, and electric valves of 4 auxiliary pipelines of the wide-range Karman vortex street flow metering device system are sequentially arranged at t 1 、t 2 、t 3 、t 4 At the time point, the main pipe flow Q is opened 1 Time-varying manner. In FIG. 3, Q 1 Is always not greater than the karman vortex street flowUpper limit of meter Q 12 Namely, the main pipeline Karman vortex flowmeter is always in the measuring range; meanwhile, the wide-range Karman vortex street flow metering device system provided by the invention can measure the total flow Q 2 Maximum value of (2) is 5 XQ 12 。
Further, according to the wide-range karman vortex street flow metering device system, N parallel branch pipelines are arranged between the upstream joint and the lower joint, and the preferable value of N is any one of values of 2,3,4,5 and 6.
Further, to avoid Q 1 At Q 12 Or
Nearby fluctuation, frequent opening and closing of the valve, and further optimization of the optimal control method is characterized by comprising the following steps: any No. i electric valve, the control condition of the opening degree from 0 to 1 is the main pipeline flow Q 1 ＞Q 12 +ΔQ a And the opening degrees of the valves with the serial numbers smaller than i are all 1; any No. i electric valve has the control condition that the opening degree is from 1 to 0 as Q 1 ×i＜Q 12 ×(i-1)-ΔQ b The opening degrees of the valves with the serial numbers larger than i are all 0; said Δ Q a And Δ Q b All are constants which are artificially set to be larger than 0.
The above description is only a limited number of embodiments, examples and preferred embodiments of the present invention, and is only intended to illustrate the inventive idea and should not be construed as limiting the scope or meaning of the claims.
The scope of the invention is defined by the appended claims and equivalents thereof. All equivalent changes, which are made on the basis of the content of the patent application, shall be unconditionally within the scope of protection of the invention.
Claims (4)
1. The utility model provides a wide range karman vortex street flow metering device system which characterized in that: the structure of the device comprises 1 upstream joint, 1 lower joint, N parallel branch pipelines between the upstream joint and the lower joint and 1 data processing unit, wherein N is more than or equal to 2; the upstream joint is used for connecting an upstream pipeline; said downstreamThe joint is used for connecting a downstream pipeline; except 1 main pipeline for measuring flow, all the N parallel branch pipelines are auxiliary pipelines for adjusting flow; the main pipeline is provided with 1 electric valve and 1 Karman vortex shedding flowmeter; each auxiliary pipeline is provided with 1 electric valve, and each auxiliary pipeline is internally provided with 1 choking body; the Karman vortex street flowmeter of the main pipeline has a vortex street generator and the choke body which are the same parts; the data processing unit can exchange data with the Karman vortex shedding flowmeter and control the opening degree of each electric valve; the central lines of the upstream joint and the lower joint are positioned on the same straight line; when all the electric valves are completely opened, the through-flow area formed by the upstream joint, the lower joint and the N parallel branch pipelines is rotationally symmetrical about a straight line where the center line is located, and the order of the rotational symmetry is N; the opening degree of M electric valves of the N electric valves is not zero, M is more than or equal to 0 and less than or equal to N, and the opening degrees of the M electric valves are the same under any condition; flow Q of the main pipeline 1 And the Karman vortex street flowmeter displays the flow Q 2 Satisfy Q 2 ＝M×Q 1 ，Q 2 The total through-flow rate of the wide-range Karman vortex street flow metering device system is obtained.
2. The wide-range karman vortex street flow metering device system of claim 1, wherein: the N parallel branch pipelines are N =3;1 electric valve and 1 Karman vortex shedding flowmeter are respectively arranged on 1 main pipeline; each of the 2 auxiliary pipelines is provided with 1 electric valve, and each auxiliary pipeline is internally provided with 1 choking body; and a through-flow area formed by the upstream joint, the lower joint and the N parallel branch pipelines is in 3-order rotational symmetry about the center line.
3. The wide-range karman vortex street flow metering device system of claim 1, wherein: the opening value of each electric valve can only be 0 or 1, the opening of the electric valve is 0 to represent complete closing, the opening of the electric valve is 1 to represent complete opening, the serial number of the main pipeline electric valve is 1, the serial number of the auxiliary pipeline electric valve is i, and i is more than or equal to 2 and is less than or equal to N; the data processing unit adopts a preferred control method to control the opening degree of each electric valve, and the preferred control method is characterized by comprising the following steps:
the Karman vortex street flowmeter has a preset measuring range of (Q) 11 ，Q 12 ) (ii) a Any No. i electric valve, the control condition of the opening degree from 0 to 1 is the main pipeline flow Q 1 ＞Q 12 And the opening degrees of the valves with the serial numbers smaller than i are all 1; any No. i electric valve has the control condition that the opening degree is from 1 to 0 as Q 1 ×i＜Q 12 The opening degrees of the valves with the X (i-1) and the serial numbers larger than i are all 0; the wide-range Karman vortex street flow metering device system has the range of (Q) 11 ，N×Q 12 )。
4. The wide-range karman vortex street flow metering device system of claim 3, wherein: to avoid Q 1 At Q 12 Or
Nearby fluctuation, frequent opening and closing of the valve, and further optimization of the optimal control method is characterized by comprising the following steps: any No. i electric valve, the control condition of the opening degree from 0 to 1 is the main pipeline flow Q 1 ＞Q 12 +ΔQ a And the opening degrees of the valves with the serial numbers smaller than i are all 1; any No. i electric valve has the control condition that the opening degree is from 1 to 0 as Q 1 ×i＜Q 12 ×(i-1)-ΔQ b The opening degrees of the valves with the serial numbers larger than i are all 0; said Δ Q a And Δ Q b All are constants which are artificially set to be larger than 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704664.0A CN115342869A (en) | 2022-06-21 | 2022-06-21 | Wide-range Karman vortex street flow metering device system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210704664.0A CN115342869A (en) | 2022-06-21 | 2022-06-21 | Wide-range Karman vortex street flow metering device system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115342869A true CN115342869A (en) | 2022-11-15 |
Family
ID=83947466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210704664.0A Withdrawn CN115342869A (en) | 2022-06-21 | 2022-06-21 | Wide-range Karman vortex street flow metering device system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115342869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129043A (en) * | 2023-10-27 | 2023-11-28 | 威海多特瑞自动化设备有限公司 | Centralized monitoring system and monitoring method for high Wen Xuanjin flowmeter |
-
2022
- 2022-06-21 CN CN202210704664.0A patent/CN115342869A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129043A (en) * | 2023-10-27 | 2023-11-28 | 威海多特瑞自动化设备有限公司 | Centralized monitoring system and monitoring method for high Wen Xuanjin flowmeter |
| CN117129043B (en) * | 2023-10-27 | 2024-02-13 | 威海多特瑞自动化设备有限公司 | Centralized monitoring system and monitoring method for high Wen Xuanjin flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102393224B (en) | Integrated intelligent flowmeter and measuring method | |
| CN101881640A (en) | Vortex mass flow meter | |
| Morrison et al. | Comparison of orifice and slotted plate flowmeters | |
| CN100425954C (en) | A differential pressure type flow measuring method and flow apparatus thereof | |
| CN115342869A (en) | Wide-range Karman vortex street flow metering device system | |
| CN106918369B (en) | A kind of device and measurement method for hydropower station pressure main conduit flow measurement | |
| CN201707087U (en) | Vortex street mass flow meter | |
| Morrison et al. | Beta ratio, axisymmetric flow distortion and swirl effects upon orifice flow meters | |
| CN104422498A (en) | Natural gas flow measuring ring detecting section device capable of reducing natural gas pulsating flow | |
| CN205352483U (en) | Gaseous ultrasonic wave flow measuring device of rectification type | |
| CN110185806A (en) | A kind of observing and controlling integral type valve flow meter | |
| CN210802568U (en) | Arnuba formula gas metering device | |
| CN211904248U (en) | V-shaped cone flowmeter | |
| CN209027599U (en) | A kind of redundant flow measuring device | |
| CN210689731U (en) | Wedge type gas metering device | |
| CN216246558U (en) | Reducing type porous balance flowmeter | |
| CN2482059Y (en) | Flow metering tube with reduced rectifier | |
| CN211926970U (en) | Plug-in type multi-throat-diameter Venturi tube flowmeter | |
| CN218847290U (en) | Ultrasonic flow metering device system | |
| Krishna et al. | Experimental analysis of multiport averaging device and effect of body shape on flow coefficient | |
| CN213985238U (en) | Asymmetric flow sensor | |
| CN218955825U (en) | Matrix flowmeter with automatic calibration function | |
| CN220120152U (en) | Multichannel high-precision vortex shedding flowmeter | |
| CN212482572U (en) | V-cone type gas metering device | |
| CN209308677U (en) | A kind of individual well production liquid metering device |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221115 |
|
| WW01 | Invention patent application withdrawn after publication |