CN211904541U - Pressure calibrating device - Google Patents
Pressure calibrating device Download PDFInfo
- Publication number
- CN211904541U CN211904541U CN202020837660.6U CN202020837660U CN211904541U CN 211904541 U CN211904541 U CN 211904541U CN 202020837660 U CN202020837660 U CN 202020837660U CN 211904541 U CN211904541 U CN 211904541U
- Authority
- CN
- China
- Prior art keywords
- pressure
- verification
- pipeline
- booster pump
- connection platform
- 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.)
- Active
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000012795 verification Methods 0.000 claims description 49
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000003709 image segmentation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011410 subtraction method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011426 transformation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a pressure calibrating device, which belongs to the technical field of pressure gauge calibration, and comprises an air source communicated with a pressure storage tank, wherein a pressure adjusting system comprises a pressure reducer and a booster pump, the pressure storage tank is connected with the pressure reducer through a pipeline, the pressure reducer is connected with the booster pump through a pipeline, the booster pump is connected with a calibrating instrument connecting platform through a pipeline, an air inlet valve is arranged between the booster pump and the calibrating instrument connecting platform, the calibrating instrument connecting platform is also provided with a vacuum pump interface and a pressure sensor, the calibrating instrument connecting platform is provided with four interfaces used for connecting different models of pressure gauges to be tested, a knocking device is arranged beside each interface, the calibrating instrument connecting platform is also connected with a standard pressure gauge, the calibrating instrument connecting platform is also connected with an exhaust valve through a pipeline, an image acquisition system comprises image acquisition elements corresponding to each pressure gauge, the utility model discloses automatically regulated pressure, automatic recording and storage examination data.
Description
Technical Field
The utility model belongs to the technical field of the manometer examination and specifically relates to a pressure calibrating installation, manometer examination and verification.
Background
The routine verification work of the common pressure gauge comprises the installation of a spare pressure gauge, the verification according to regulations, the issuing of original records, reports and the like, and the verification work of the pressure gauge is huge, so that a large amount of labor and time are needed. The calibration of a general pressure gauge is to install a pressure gauge to be tested and a standard pressure gauge (a precision pressure gauge or a precision vacuum pressure gauge) on a pressure gauge calibrator, use air as a medium at low pressure, use liquid (water or transformer oil or mixed oil) as a medium at high pressure, pressurize the pressure gauge to be tested and the precision pressure gauge at the same time, and complete the calibration of the pressure gauge according to the requirements of national calibration regulations. Because the verification media are different, the gas calibrator for verifying the low-pressure gauge and the liquid calibrator for verifying the high-pressure gauge cannot be used together. When the oil is used as a medium for calibrating the pressure gauge, the transformer oil or the mixed oil has certain volatility and has certain harm to the environment of a calibration chamber, and in the process of calibrating the pressure gauge, a calibration medium can be more or less remained in one part of the spring tube or overflows from a corresponding pressure pipeline interface, so that the calibration medium is not as convenient and clean as an air medium.
Disclosure of Invention
The utility model aims to solve the technical problem that a pressure calibrating installation of automatic pressurization, automatic record numerical value is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the pressure calibrating device comprises an air source, wherein the air source is communicated with a pressure storage tank, the pressure storage tank is connected with a pressure regulating system, the control system controls the pressure regulating system to regulate the gas pressure in a pipeline, the control system controls an air inlet valve, a fine adjustment valve and a pressure relief valve to regulate the gas pressure in a calibrating pipeline in a calibrating instrument connecting table, the pressure regulating system comprises a pressure reducer, a pressure reducing valve and a booster pump, the pressure storage tank is connected with the pressure reducer through a pipeline, the pressure reducer is connected with the pipeline of the booster pump, the booster pump is connected with the calibrating instrument connecting table through a pipeline, an air inlet valve is arranged between the booster pump and the calibrating instrument connecting table, the calibrating instrument connecting table is also provided with a vacuum pump interface and a pressure sensor, the calibrating instrument connecting table is provided with four interfaces for connecting different pressure gauges to be tested, the other knocking device that is provided with of every interface, examination instrument connection platform still is connected with the standard pressure gauge, examination instrument connection platform still has discharge valve through the tube coupling, and image acquisition system includes the image acquisition component that corresponds the setting with every manometer, and control system handles the data that image acquisition component gathered and calculates, stores, pressure sensor converts pressure signal into the data that control system can read.
The utility model discloses technical scheme's further improvement lies in: the image acquisition element comprises a light source, a light source fastener and a CCD camera arranged right in front of the pressure gauge.
The utility model discloses technical scheme's further improvement lies in: the knocking device comprises a telescopic rod, a permanent magnet is arranged at one end, far away from the calibrating instrument connecting table, of the telescopic rod, a knocking hammer is arranged on the telescopic rod, a knocking hammer handle is hinged to the telescopic rod, a knocking head is arranged on one side, close to the pressure gauge to be detected, of the knocking hammer, and an electromagnet is arranged on the other side of the knocking hammer.
Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:
the pressure regulating system is controlled to regulate the gas pressure of the pipeline through the control system, the control system controls the gas pressure of the verification pipeline of the verification instrument connecting table according to the pressure value given by the pressure sensor, automatic pressure rise and fall are realized, the instrument tapping displacement verification is realized automatically through the control knocking device, the automatic recording verification data is realized through the recording of the control system on the data, the verification instrument connecting table is provided with four pressure gauge interfaces of different models, the actual verification work is convenient to perform, the verification instrument connecting table is provided with a vacuum pump interface, the vacuum pump is convenient to be connected to detect a negative pressure type instrument, the image data of the collected pressure gauge is detected through an image collecting element, the control system stores the data, and the manual verification is convenient. Clear images can be obtained through the CCD camera and the light source, and the CCD camera and the pressure gauge are fixed in position through the light source fastener. The knocking device controls the knocking hammer to tap the instrument through the matching of the electromagnet and the permanent magnet.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic view of the knocking device of the present invention;
the device comprises an air source 1, an air source 2, a verification instrument connecting table 3, a control system 4, a pressure storage tank 5, a booster pump 6, a pressure reducer 7, a pressure reducing valve 8, an air inlet valve 9, a fine adjustment valve 10, a standard pressure gauge 11, a knocking device 12, an image acquisition element 13, a pressure reducing valve 14, a knocking hammer 15, a permanent magnet 16, a knocking head 17, an electromagnet 18, a telescopic rod 19, a pressure gauge to be detected 20 and a pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Embodiment 1 is as shown in fig. 1, a pressure calibrating apparatus includes a gas source 1, the gas source 1 is compressed air provided by a 2.5Mpa air compressor, the gas source 1 is communicated with a pressure storage tank 4, the pressure storage tank 4 is connected with a pressure regulating system to regulate gas pressure, the pressure regulating system includes a pressure reducer 6, a pressure reducing valve 7 and a booster pump 5, the pressure storage tank 4 is connected with the pressure reducer 6 through a pipeline, the pipeline is a high-pressure gas steel pipe, the pressure reducer 6 is connected with the booster pump 5 through a pipeline, the pressure reducing valve 7 is arranged on the pipeline between the pressure reducer 6 and the booster pump 5, the pressure reducer 6 reduces the pressure of the high-pressure gas, the booster pump 5 promotes the pressure of the high-pressure gas, the booster pump 5 is connected with a calibrating instrument connecting table 2, an air inlet valve 8 is arranged between the booster pump 5 and the, high pressure gasThe pressure sensor 20 is arranged on the pipeline in the verification instrument connection platform 2, the pressure sensor 20 is used for detecting the pressure of the verification pipeline in the verification instrument connection platform 2 and converting a pressure signal into data to be transmitted to the control system 3, the verification pipeline in the verification instrument connection platform 2 is provided with a fine adjustment valve 9 for finely adjusting the air pressure in the verification pipeline, the verification instrument connection platform 2 is provided with a detected pressure gauge 19 interface, and four different interfaces are preset on the installation interface of the detected pressure gauge 19, such as M20 1.5, M14 1.5, M10 1, M14,
The requirement of the pressure gauge 19 to be tested on the interfaces of different models is met, the number of each interface is not less than two, and a knocking device 11 is arranged beside each interface and used for executing the detection step of the tapping instrument. The verification instrument connecting table 2 is also connected with a standard pressure gauge 10 for comparison with a pressure gauge 19 to be detected, and the tail end of the pipeline of the verification instrument connecting table 2 is connected with an exhaust valve for exhausting high-pressure gas. The verification instrument connecting table 2 is also provided with a vacuum pump interface for connecting a vacuum pump, and the connection of the vacuum pump to the verification pipeline for vacuumizing and manufacturing negative pressure can meet the requirement of carrying out negative pressure verification on the detected pressure gauge 19. The image acquisition system comprises an image acquisition element 12 and a data transmission line, the image acquisition element 12 is electrically connected with the control system 3 through the data transmission line, and the image acquisition element 12 comprises a CCD camera and a light source which are arranged on the front surface of the pressure gauge 19 to be detected. The light source is a dome light source with diffuse reflection of the LEDs. The control system 3 is a computer which controls the pressure regulating system to regulate the pressure of the pipeline and controls the lifting of the pressure calibrating pipeline of the calibrating instrument connecting table 2 and the operation of the knocking device 11.
In a preferred embodiment, the knocking device 11 comprises an expansion link 18 and a knocking hammer 14 hinged on the expansion link 18, a permanent magnet 15 is fixed at one end of the expansion link 18, which is far away from the calibration instrument connecting table 2, a hammer handle of the knocking hammer 14 is hinged on the expansion link 18, an electromagnet 17 is arranged at one end, which is close to the permanent magnet 15 on the expansion link 18, of the hammer head of the knocking hammer 14, a knocking head 16 is arranged at the other end of the hammer head of the knocking hammer 14, and the knocking head 16 is made of rubber. The electromagnet 17 is started, the electromagnet 17 is attracted and attached to the permanent magnet 15 at the end part of the telescopic rod 18, the electromagnet 17 loses magnetism when power is off, the hammer head 14 of the knocking hammer 14 is released, the knocking head 16 of the hammer head 14 of the knocking hammer knocks the pressure gauge 19 to be detected, the electromagnet 17 is started, and the knocking hammer 14 is reset.
In the preferred embodiment, the image capturing device 12 includes a light source, an industrial lens, and a light source fastener, and the CCD camera is used as a photosensitive device to convert the optical signal into an analog current signal. The industrial lens keeps the image collected by the camera consistent. The light source fastener is used for guaranteeing that camera central point puts and dial plate central point puts and aligns, prevents that the camera shooting angle difference from arousing the deviation to the pointer reading.
The working method comprises the following steps: open air supply 1, air compressor work, high-pressure gas gets into and stores up pressure gas jar 4, and pressure reducer 6 and reducing valve 7 step down gas pressure, start booster pump 5 to gas pressure boost, increase gas pressure to the measurement upper limit of being examined manometer 19 through the cooperation of reducing valve 7 and booster pump 5 to the whole measuring range of manometer 19 is examined in the cover. The inlet valve 8 is opened and the pressure sensor 20 transmits the pressure in the test line at that time to the control system 3. And closing the air inlet valve 8, reducing the gas pressure in the verification pipeline through the fine adjustment valve 9, adjusting the gas pressure in the verification pipeline to a first verification point, starting the image acquisition element 12 to acquire dial images of the detected pressure gauge 19 and the standard pressure gauge 10, and transmitting the images to the control system 3 for data processing and storage. And starting the tapping device 11, tapping the pressure gauge 19 to be detected, collecting and processing the dial plate image of the pressure gauge 19 to be detected after tapping, and performing tapping displacement verification. And repeatedly adjusting the gas pressure in the verification pipeline to verify other verification points. And when the upper measurement limit of the pressure gauge 19 to be detected is verified, carrying out pressure resistance for 3 minutes, and after the pressure resistance is finished, carrying out pressure reduction verification on the value indicated by the pressure gauge 19 to be detected according to the steps. And after the verification is finished, closing the air inlet valve 8, opening the pressure relief valve 13, and resetting the pressure in the verification pipeline.
And starting a CCD camera at each verification point to photograph the dial plates of the detected pressure gauge 19 and the standard pressure gauge 10, and transmitting image information to the control system 3 for data processing. The computer of the control system 3 firstly carries out image preprocessing on the image, the image preprocessing firstly carries out image processing by using a subtraction method, then the image is segmented based on a threshold value which is a histogram threshold value, the boundary of a background, a pointer and a scale mark is segmented by an edge detection part, the image is binarized to obtain an image with smaller data volume, the image is subjected to thinning algorithm processing, and a pointer framework is extracted. For dial scale mark calibration, the number indicating part of dial scale is regarded as 270-degree arc, the radian range is from-45 degrees to 225 degrees, all the detection points and the scale are uniformly distributed on the arc, and a central projection method is selected for image segmentation and binaryzation. And fitting a straight line to the pointer and the dial scale, wherein the straight line fitting is calculated by adopting the conventional Hough transformation method. The dial reading is calculated through an angle proportion method, the scale marks are calibrated, when the pointer is located between the two scale marks, the pointer reading is calculated through relative comparison between the angle of the straight line of the pointer and the angles of the two scale marks, and the deviation caused by uneven scales is reduced. The computer of the control system 3 stores the images of the pressure gauge 19 to be detected and the images of the standard pressure gauge 10 obtained in the verification process, so that the workers can conveniently perform manual verification and proofreading, and the computer processes the data obtained by calculation to form a verification report and archives the verification report.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. A pressure verification device, includes air supply (1), its characterized in that: air supply (1) intercommunication pressure storage gas jar (4), pressure regulating system is connected to pressure storage gas jar (4), and gas pressure in the verification pipeline in control system (3) control pressure regulating system governing pipeline, control system (3) control admission valve (8), micro-actuator valve (9) and relief valve (13) regulation verification instrument connection platform (2), pressure regulating system includes pressure reducer (6), relief valve (7) and booster pump (5), pressure storage gas jar (4) are through tube coupling pressure reducer (6), be provided with relief valve (7) on the pipeline that pressure reducer (6) are connected booster pump (5), booster pump (5) are through tube coupling verification instrument connection platform (2), be provided with admission valve (8) between booster pump (5) and verification instrument connection platform (2), verification instrument connection platform (2) still is provided with vacuum pump interface and pressure sensor (20), be provided with on the inspection pipeline in examination instrument connection platform (2) fine setting valve (9), examination instrument connection platform (2) are provided with four kinds of interfaces that are used for connecting different models and are examined manometer (19), and every interface quantity is no less than two, and every interface is other to be provided with knocking device (11), examination instrument connection platform (2) still are connected with standard pressure table (10), examination instrument connection platform (2) still have relief valve (13) through the tube coupling, and image acquisition system includes image acquisition component (12) that correspond the setting with every manometer, and control system (3) are handled the data of image acquisition component (12) collection and are calculated, are stored, pressure sensor (20) convert pressure signal into the data that control system (3) can read.
2. A pressure verification device as claimed in claim 1, wherein: the image acquisition element (12) comprises a light source and a CCD camera arranged right in front of the pressure gauge (19) to be detected.
3. A pressure verification device as claimed in claim 1, wherein: the knocking device (11) comprises a telescopic rod (18), a permanent magnet (15) is arranged at one end, away from the verification instrument connecting table (2), of the telescopic rod (18), a knocking hammer (14) is arranged on the telescopic rod (18), the handle of the knocking hammer (14) is hinged to the telescopic rod (18), one side, close to a detected pressure gauge (19), of the knocking hammer (14) is a knocking head (16), and the other side of the knocking hammer (14) is an electromagnet (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020837660.6U CN211904541U (en) | 2020-05-19 | 2020-05-19 | Pressure calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020837660.6U CN211904541U (en) | 2020-05-19 | 2020-05-19 | Pressure calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211904541U true CN211904541U (en) | 2020-11-10 |
Family
ID=73271565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020837660.6U Active CN211904541U (en) | 2020-05-19 | 2020-05-19 | Pressure calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211904541U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063543A (en) * | 2021-03-15 | 2021-07-02 | 金仪计量科技(苏州)有限公司 | Pressure gauge calibration method and calibration system |
| CN114235277A (en) * | 2021-12-31 | 2022-03-25 | 山东爱特机电技术有限责任公司 | Double-path batch intelligent calibrating device for barometer and oil pressure meter |
| CN114383774A (en) * | 2021-12-31 | 2022-04-22 | 北京斯贝克科技有限责任公司 | Full-automatic instrument inspection bench and full-automatic instrument inspection method |
| CN114812928A (en) * | 2022-03-10 | 2022-07-29 | 江苏省特种设备安全监督检验研究院 | Quick-opening pressure vessel safety interlocking device monitoring system |
| CN115112294A (en) * | 2022-06-28 | 2022-09-27 | 合肥安胜智能电子有限公司 | Pressure gauge production calibration system and method based on IO-Link |
-
2020
- 2020-05-19 CN CN202020837660.6U patent/CN211904541U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063543A (en) * | 2021-03-15 | 2021-07-02 | 金仪计量科技(苏州)有限公司 | Pressure gauge calibration method and calibration system |
| CN113063543B (en) * | 2021-03-15 | 2022-12-20 | 金仪计量科技(苏州)有限公司 | Calibration method and calibration system for pressure gauge |
| CN114235277A (en) * | 2021-12-31 | 2022-03-25 | 山东爱特机电技术有限责任公司 | Double-path batch intelligent calibrating device for barometer and oil pressure meter |
| CN114383774A (en) * | 2021-12-31 | 2022-04-22 | 北京斯贝克科技有限责任公司 | Full-automatic instrument inspection bench and full-automatic instrument inspection method |
| CN114812928A (en) * | 2022-03-10 | 2022-07-29 | 江苏省特种设备安全监督检验研究院 | Quick-opening pressure vessel safety interlocking device monitoring system |
| CN114812928B (en) * | 2022-03-10 | 2023-06-02 | 江苏省特种设备安全监督检验研究院 | Monitoring system for safety interlocking device of quick-opening pressure vessel |
| CN115112294A (en) * | 2022-06-28 | 2022-09-27 | 合肥安胜智能电子有限公司 | Pressure gauge production calibration system and method based on IO-Link |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211904541U (en) | Pressure calibrating device | |
| CN111521321A (en) | Intelligent verification system and method for pointer type pressure gauge | |
| CN201476938U (en) | Full-automatic pressure checking equipment of piston type pressure gauge | |
| CN212206470U (en) | Pointer type pressure gauge intelligent verification system | |
| CN205317495U (en) | Full -automatic calibrating installation of fuel tanker aircraft | |
| CN211317615U (en) | Full-automatic pressure verification instrument | |
| CN117351006B (en) | Deep learning-based method and system for detecting surface defects of automobile sheet metal part | |
| CN117330156A (en) | Automatic fault detection and analysis device for gas flowmeter | |
| CN111882569A (en) | Machine vision-based pointer type pressure gauge automatic calibrator indication value reading method | |
| CN115112366A (en) | Breathing valve all-condition simulation and high-precision intelligent detection system and method | |
| CN110715711A (en) | Automatic calibration system of graduated flask | |
| CN203037477U (en) | Static characteristic detection system of gas pressure regulator | |
| CN113158558B (en) | High-speed railway roadbed continuous compaction analysis method, device and analyzer | |
| CN213932966U (en) | Full-automatic pressure gauge calibrator | |
| CN115540978A (en) | Water meter verification system based on digital image | |
| CN107764479A (en) | A kind of precision pressure gauge batch measurements verification system and method | |
| CN111289064A (en) | Online calibrating device and method for metering performance of hydrogenation machine | |
| CN116612180A (en) | Commodity quantity detecting system capable of being maintained in real time | |
| CN108120550A (en) | A kind of high-pressure gas pressure field calibration method | |
| CN203949753U (en) | A kind of vacuum pressure valve automatic Verification proving installation | |
| CN212513464U (en) | Automatic detection device for mechanical pointer instrument | |
| CN2807234Y (en) | Tightness detector for pipe and pressure container | |
| CN212030697U (en) | Online calibrating device of hydrogenation machine measurement performance | |
| CN213842325U (en) | Natural gas testing and verification integrated system | |
| CN112179459B (en) | Water meter load detection device for simulating water meter use environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.16, Xuelian Road, Dongli District, Tianjin Patentee after: Tihe group measurement and testing (Tianjin) Co.,Ltd. Address before: No.16, Xuelian Road, Dongli District, Tianjin Patentee before: CIC metrology inspection (Tianjin) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240814 Address after: Room 601, 6th Floor, 767 Changshou Road, Putuo District, Shanghai 200060 Patentee after: Tihe Testing and Certification Group Co.,Ltd. Country or region after: China Address before: No.16, Xuelian Road, Dongli District, Tianjin Patentee before: Tihe group measurement and testing (Tianjin) Co.,Ltd. Country or region before: China |