CN112484790A - Flow measuring device - Google Patents
Flow measuring device Download PDFInfo
- Publication number
- CN112484790A CN112484790A CN202011237432.6A CN202011237432A CN112484790A CN 112484790 A CN112484790 A CN 112484790A CN 202011237432 A CN202011237432 A CN 202011237432A CN 112484790 A CN112484790 A CN 112484790A
- Authority
- CN
- China
- Prior art keywords
- circulation
- pipe
- pipeline
- flow
- fluid
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 64
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000006247 magnetic powder Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000006249 magnetic particle Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000149 penetrating effect Effects 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Multimedia (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a flow measuring device, which comprises a fluid pipeline, wherein at least two radial through holes are formed in the pipe wall of the fluid pipeline, a circulating outer pipe connected to the outside of the fluid pipeline and a circulating inner pipe connected to the inside of the fluid pipeline are respectively arranged on the two radial through holes, the circulating inner pipe is a net pipe with meshes formed in the pipe wall, the circulating outer pipe is a closed pipeline, the two radial through holes, the circulating outer pipe and the circulating inner pipe form a communicated circulating pipeline, a plurality of hollow spheres are arranged in the circulating pipeline, the hollow spheres circularly flow in the circulating pipeline in the flowing state of inner fluid in the fluid pipeline, and a flow velocity sensor for detecting the flowing speed of the hollow spheres is arranged near the circulating outer pipe. The flow measuring device does not need to measure the pressure difference inside the fluid, does not need to adopt a Venturi tube structure, and has the characteristics of simple structure, convenience and fastness in use, easiness in processing and manufacturing, rapidness and accuracy in measuring the flow velocity of the fluid and the like.
Description
Technical Field
The invention relates to the technical field of fluid flow velocity measurement, in particular to a flow measuring device.
Background
In the prior art, a venturi type differential pressure flowmeter, which is an instrument for measuring a flow rate, is mostly used for measuring the flow rate of a fluid. The flow rate is measured by measuring the pressure difference based on the principle that a certain relation exists between the pressure difference and the flow rate generated when the fluid flows through the throttling device.
When current differential pressure flowmeter is measuring the fluid flow, throttling arrangement installs in being surveyed the pipeline with fixed form mostly, and it is comparatively inconvenient to dismantle, uses the back for a long time at throttling arrangement, the easy debris that a large amount of fluids of adhesion carried in its throttle passage, and these debris can lead to the metering error increase, can have part ageing phenomenon after using for a long time of throttling arrangement in addition, consequently need regularly dismantle clearance and change throttling arrangement.
Chinese patent CN202010296448.8 discloses a flow measurement mechanism and a measurement device, which belongs to the technical field of medical equipment, and comprises a housing, a metering component and a movable throttling component arranged above the housing, wherein the metering component and the movable throttling component are arranged inside the housing, an air inlet cavity is arranged on one side inside the housing, an air outlet cavity is arranged on the other side, and the sectional area of the air outlet cavity is larger than that of the air inlet cavity. The embodiment of the invention has the advantages of simple structure and convenient assembly and disassembly, and through introducing the airflow from the air inlet cavity and discharging the airflow from the air outlet cavity after passing through the throttling component, a certain pressure difference is formed between the air inlet cavity and the air outlet cavity under the action of the throttling component, and the flow data is obtained by utilizing the metering component; after the throttling assembly is used for a period of time, the throttling assembly is taken out from the air outlet cavity port by removing the fixing of the supporting mechanism on the throttling assembly, so that the throttling assembly is cleaned and maintained, the parts of the throttling assembly are prevented from aging, and attachments are prevented from adhering to the parts, and the metering precision is reduced. However, the flow measuring mechanism and the measuring device still adopt a mode of measuring differential pressure to measure the flow of the fluid, and the device still has a complex structure and is inconvenient to use.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a flow measuring device which does not need to measure the pressure difference in fluid, does not need to adopt a Venturi tube structure, has a simple structure, is convenient and fast to use, is easy to process and manufacture, and can quickly and accurately measure the flow velocity of the fluid.
In order to achieve the above object, the technical solution of the present invention is to provide a flow measuring device, which includes a fluid pipeline, at least two radial through holes are formed in a pipe wall of the fluid pipeline, an outer circulation pipe connected to an outside of the fluid pipeline and an inner circulation pipe connected to an inside of the fluid pipeline are respectively formed in the two radial through holes, the inner circulation pipe is a mesh pipe with meshes formed in a pipe wall, the outer circulation pipe is a closed pipeline, the two radial through holes form a circulation pipeline communicated with the outer circulation pipe and the inner circulation pipe, a plurality of hollow spheres are arranged in the circulation pipeline, the hollow spheres circularly flow in the circulation pipeline in a state of fluid flow in the fluid pipeline, and a flow rate sensor for detecting a flow rate of the hollow spheres is arranged near the outer circulation pipe.
In order to enable the hollow ball bodies to have a moving interval between the ball bodies in the process of flowing in the circulating outer pipe and the circulating inner pipe, the flow velocity sensor can count the number of hollow balls passing through the flow velocity sensor in unit time conveniently, the preferable technical scheme is that a plurality of ejector pins are arranged on the surface of the hollow ball bodies. In order to avoid the thimble from being inserted into other spheres, the end part of the thimble can be made into a spherical top.
In order to facilitate detection by electromagnetic signals, the number of hollow spheres passing through the flow rate sensor per unit time is preferably determined by filling magnetic powder in the hollow spheres.
In order to facilitate the detection through the electromagnetic signals and the quantity of the hollow spheres passing through the flow velocity sensor in unit time, the preferred technical scheme is that the hollow spheres are magnetic plastic hollow spheres made of plastic containing magnetic powder.
In order to simplify the overall structure of the device and facilitate the processing and manufacturing of the circulating pipeline, the further preferred technical scheme is that the circulating outer pipe and the circulating inner pipe are both U-shaped pipes.
In order to facilitate the visual detection and observation of the flow velocity of the fluid and prevent the fluid from corroding the circulating pipe, the preferable technical proposal is that the circulating outer pipe is a glass pipe or a transparent plastic pipe, and the circulating inner pipe is a plastic net pipe or a stainless steel net pipe.
In order to facilitate the detection of the pressure and the temperature inside the fluid, a further preferred technical solution is that a pressure sensor and/or a temperature sensor is arranged on the inner wall of the fluid pipeline.
In order to simplify the structure of the sensor, reduce the cost of the sensor and prolong the service life of the sensor, the flow velocity sensor is a photoelectric sensor or an electromagnetic induction sensor.
In order to convert the flow information, the pressure information and the temperature information monitored by the sensor in the three-dimensional pipeline into identifiable, outputable and storable information and measure and control the flowing state of the fluid in the fluid pipeline according to the information, the flow rate sensor, the pressure sensor and/or the temperature sensor are connected with the controller.
In order to facilitate the connection of the outer circulation pipe and the inner circulation pipe to the fluid pipeline and avoid the fluid leakage in the fluid pipe, a connection pipe is inserted in the radial through hole, the two ends of the outer circulation pipe and the inner circulation pipe are respectively connected with the two ends of the connection pipe, and a sealing element is filled between the connection pipe and the radial through hole.
The flow measuring device has the advantages that the flow measuring device does not need to measure the pressure difference in the fluid, does not need to adopt a Venturi tube structure, and has the characteristics of simple structure, convenience and quickness in use, easiness in processing and manufacturing, quickness and accuracy in measuring the flow velocity of the fluid and the like. Because the circulation inner pipe is a net-shaped structure pipe, the hollow ball arranged in the circulation inner pipe flows along with the fluid under the driving of the fluid flow force in the fluid pipeline. The hollow ball in the circulating inner tube passes through the tube hole and flows into the circulating outer tube, so that a circulation formed by the hollow ball in the circulating inner tube → the tube hole → the circulating outer tube → the tube hole → the circulating inner tube is formed, then the number of the hollow ball passing through the flow sensor hollow device in unit time is detected by the flow sensor arranged outside the fluid pipeline, and the number is converted into the flow rate of the fluid by the controller. Adopt the device to detect the fluidic flow in the pipeline, changed the traditional detection mode that adopts venturi to detect fluid flow through the pressure differential mode, its structure compares with the detection structure of venturi formula, has obtained very big simplification, when the fluid velocity of flow in the fluid pipeline need not examine time measuring moreover, can demolish circulation outer tube and flow sensor, with the shutoff with the pipe wall hole shutoff on can, can not cause the hindrance to the fluidic flow in the pipeline simultaneously.
Drawings
FIG. 1 is a schematic view of the structure of a flow measuring device of the present invention.
In the figure: 1. a fluid conduit; 2. a radial through hole; 3. circulating the outer tube; 4. circulating the inner pipe; 5. mesh openings; 6. a hollow sphere; 7. a flow rate sensor; 8. a thimble; 9. a pressure sensor and/or a temperature sensor.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the present invention is a flow measuring device, the device includes a fluid pipeline 1, at least two radial through holes 2 are provided on a pipe wall of the fluid pipeline 1, a circulation outer pipe 3 connected to an outside of the fluid pipeline 1 and a circulation inner pipe 4 connected to an inside of the fluid pipeline 1 are respectively provided on the two radial through holes 2, the circulation inner pipe 4 is a net pipe with meshes 5 on the pipe wall, the circulation outer pipe 3 is a closed pipeline, the two radial through holes 2, the circulation outer pipe 3 and the circulation inner pipe 4 form a communicated circulation pipeline, a plurality of hollow spheres 6 are provided in the circulation pipeline, the plurality of hollow spheres 6 circularly flow in the circulation pipeline in a state of fluid flowing in the fluid pipeline, and a flow rate sensor 7 for detecting a flow rate of the hollow spheres 6 is provided near the circulation outer pipe 3.
In order to enable the hollow sphere 1 to have a moving interval between spheres in the process of flowing in the circulating outer tube 3 and the circulating inner tube 4, so that the flow velocity sensor can count conveniently, and the number of hollow spheres passing through the flow velocity sensor in unit time is determined, in a preferred embodiment of the invention, a plurality of ejector pins 8 are arranged on the surface of the hollow sphere 6. In order to prevent the thimble 8 from penetrating into other spheres, the end of the thimble 8 may be made as a spherical top.
In order to facilitate the detection by electromagnetic signals, the number of hollow spheres 6 passing through the flow rate sensor 7 per unit time, a preferred embodiment of the present invention is further that magnetic particles are filled in the hollow spheres 6.
In order to facilitate the detection by means of electromagnetic signals, the number of hollow spheres passing through the flow rate sensor per unit time, a preferred embodiment of the invention also provides that the hollow spheres 6 are magnetic plastic hollow spheres 6 made of plastic containing magnetic powder.
In order to simplify the overall structure of the device and facilitate the processing and manufacturing of the circulating pipeline, the further preferred embodiment of the invention is that the circulating outer pipe 3 and the circulating inner pipe 4 are both U-shaped pipes.
In order to facilitate the visual detection and observation of the flow rate of the fluid and prevent the fluid from corroding the circulating pipe, the further preferable embodiment of the invention is that the circulating outer pipe 3 is a glass pipe or a transparent plastic pipe, and the circulating inner pipe 4 is a plastic net pipe or a stainless steel net pipe.
In order to facilitate the detection of the pressure and/or temperature inside the fluid, a further preferred embodiment of the present invention further comprises a pressure sensor and/or a temperature sensor 9 disposed on the inner wall of the fluid conduit 1.
In order to simplify the structure of the sensor, reduce the cost of the sensor and prolong the service life of the sensor, the flow sensor 7 is a photoelectric sensor or an electromagnetic induction sensor.
In order to convert the flow information, the pressure information and the temperature information monitored by the sensor in the three-dimensional pipeline into identifiable, outputable and storable information and measure and control the flowing state of the fluid in the fluid pipeline according to the information, the invention further preferably adopts the technical scheme that the flow rate sensor 9, the pressure sensor and/or the temperature sensor 9 are connected with a controller (not shown in the figure).
In order to facilitate the connection of the outer circulation pipe 3 and the inner circulation pipe 4 to the fluid pipeline 1 and to avoid fluid leakage in the fluid pipe height, a further preferred embodiment of the present invention is that a connection pipe (not shown) is inserted into the radial through hole 2, both ends of the outer circulation pipe 3 and the inner circulation pipe 4 are respectively connected to both ends of the connection pipe, and a sealing member is filled between the connection pipe and the radial through hole.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a flow measuring device, a serial communication port, the device includes the fluid pipeline, at least two are equipped with radial through-hole on the pipe wall of fluid pipeline, be equipped with the circulation outer tube of connection outside the fluid pipeline and connect the circulation inner tube inside the fluid pipeline on two radial through-holes respectively, the circulation inner tube is the network management that is equipped with the mesh on the pipe wall, the circulation outer tube is airtight pipeline, two radial through-holes constitute the circulation pipeline of UNICOM with circulation outer tube and circulation inner tube, be equipped with a plurality of hollow spheroid in the circulation pipeline, a plurality of clean spheroid is at the internal fluid flow state of fluid pipeline, at circulation pipeline internal circulation flow, near circulation outer tube is equipped with the velocity of flow sensor who is used for detecting hollow spheroid flow.
2. The flow measuring device of claim 1, wherein a plurality of pins are disposed on a surface of the hollow sphere.
3. The flow measuring device of claim 2, wherein the hollow sphere is filled with magnetic particles.
4. The flow measuring device of claim 2, wherein the hollow sphere is a magnetic plastic hollow sphere made of plastic containing magnetic powder.
5. The flow measuring device of claim 3 or 4, wherein the outer circulation pipe and the inner circulation pipe are both U-shaped pipes.
6. The flow measuring device of claim 5, wherein the outer circulating tube is a glass tube or a transparent plastic tube, and the inner circulating tube is a plastic mesh tube or a stainless steel mesh tube.
7. The flow measuring device of claim 6, wherein a pressure sensor and/or a temperature sensor is provided on the inner wall of the fluid conduit.
8. The flow rate measurement device of claim 7, wherein the flow sensor is a photoelectric sensor or an electromagnetic induction sensor.
9. The flow measuring device of claim 8, wherein the flow rate sensor, pressure sensor and/or temperature sensor is connected to a controller.
10. The flow rate measuring device according to claim 8, wherein a connecting pipe is inserted into the radial through hole, both ends of the outer circulation pipe and the inner circulation pipe are connected to both ends of the connecting pipe, respectively, and a sealing member is filled between the connecting pipe and the radial through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237432.6A CN112484790B (en) | 2020-11-09 | 2020-11-09 | Flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237432.6A CN112484790B (en) | 2020-11-09 | 2020-11-09 | Flow measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112484790A true CN112484790A (en) | 2021-03-12 |
| CN112484790B CN112484790B (en) | 2024-03-08 |
Family
ID=74929230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011237432.6A Active CN112484790B (en) | 2020-11-09 | 2020-11-09 | Flow measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112484790B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034280U (en) * | 1988-02-01 | 1989-03-15 | 浙江大学 | Strain tube flow velocity sensor |
| US20130228020A1 (en) * | 2012-03-05 | 2013-09-05 | Spirax-Sarco Limited | Flow meter |
| CN103389389A (en) * | 2013-08-28 | 2013-11-13 | 魏巍 | Gravity flow velocity sensor and open channel flow velocity and flow rate monitoring device |
| CN203594977U (en) * | 2013-12-17 | 2014-05-14 | 北京沃仕隆工业测控技术有限公司 | Coal gas flow meter |
| CN104316117A (en) * | 2014-11-20 | 2015-01-28 | 东南大学 | Flow measuring device |
| DE102017006456A1 (en) * | 2017-07-07 | 2018-08-02 | Baumer Hhs Gmbh | Device for detecting a volume flow of a process fluid |
| CN208672667U (en) * | 2018-08-21 | 2019-03-29 | 北京华宇天威科技有限公司 | A kind of distribution acoustics doppler flow amount monitoring device |
-
2020
- 2020-11-09 CN CN202011237432.6A patent/CN112484790B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034280U (en) * | 1988-02-01 | 1989-03-15 | 浙江大学 | Strain tube flow velocity sensor |
| US20130228020A1 (en) * | 2012-03-05 | 2013-09-05 | Spirax-Sarco Limited | Flow meter |
| CN103389389A (en) * | 2013-08-28 | 2013-11-13 | 魏巍 | Gravity flow velocity sensor and open channel flow velocity and flow rate monitoring device |
| CN203594977U (en) * | 2013-12-17 | 2014-05-14 | 北京沃仕隆工业测控技术有限公司 | Coal gas flow meter |
| CN104316117A (en) * | 2014-11-20 | 2015-01-28 | 东南大学 | Flow measuring device |
| DE102017006456A1 (en) * | 2017-07-07 | 2018-08-02 | Baumer Hhs Gmbh | Device for detecting a volume flow of a process fluid |
| CN208672667U (en) * | 2018-08-21 | 2019-03-29 | 北京华宇天威科技有限公司 | A kind of distribution acoustics doppler flow amount monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 李云华 等: "浅谈威力巴流量计的应用", 《中国仪器仪表 》, pages 17 - 19 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112484790B (en) | 2024-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100538307C (en) | A kind of wind tunnel calibration method for large flow gas pipeline averaging velocity tube flowmeter | |
| CN201945336U (en) | Anti-clogging probe type pitot tube flowmeter | |
| CN202483554U (en) | Oil well produced-fluid optical fiber measuring system | |
| CN102620776B (en) | Built-in middle through hole dynamic throttling element flowmeter | |
| CN207395815U (en) | Wide-range plug-in type intellectual water meter | |
| CN103900937B (en) | A kind of experimental provision for measuring droplet profile and size in ring spray field | |
| CN112484790A (en) | Flow measuring device | |
| CN102620775B (en) | Middle through hole movable throttling element flow meter capable of preventing blockage | |
| CN108760232A (en) | A kind of experimental rig and test method for probing into surface drag reduction mechanism | |
| CN201181224Y (en) | Bypass type pipeline flowmeter | |
| CN218973542U (en) | Turbine flowmeter with calibration function | |
| CN207147558U (en) | A kind of binary channels wide-range than flowmeter | |
| CN116337167A (en) | Double-bent-tube flow pressure measuring structure and method thereof | |
| CN101251397A (en) | By-pass type pipeline flowmeter | |
| CN115307693A (en) | Multi-range adjustable MEMS differential pressure flowmeter | |
| CN114252119A (en) | High-precision ultralow-flow bubble flow instrument and flow calibration method | |
| CN208780273U (en) | A kind of integration all risk insurance temperature jacket type metal pipe float flow apparatus | |
| CN201662567U (en) | Tubular differential pressure flow control system used for gas chromatograph | |
| CN203011438U (en) | Gas-liquid two-phase flow pitotbar flow meter | |
| CN207423280U (en) | Gas flowmeter | |
| CN201662566U (en) | Tubular differential pressure flow air resistor device | |
| CN206670745U (en) | A kind of vane type borne bacteria sampler flow calibrating device | |
| CN2391174Y (en) | Integral ultrasound flow meter | |
| CN201507434U (en) | Laboratory water purifier water purification pump testing device | |
| CN104280076A (en) | High-precision large-diameter vortex 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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240202 Address after: 214400 No.98, Qiaoqi Renmin Road, XuXiake Town, Jiangyin City, Wuxi City, Jiangsu Province Applicant after: Jiangsu Weiersheng Electronic Technology Co.,Ltd. Country or region after: China Address before: 214400 No.12 Fuyuan Road, Jiangyin City, Wuxi City, Jiangsu Province Applicant before: Jiangyin Weisheng Instrument Manufacturing Co.,Ltd. Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |