CN113108855A - Mass flow meter based on Coriolis principle - Google Patents
Mass flow meter based on Coriolis principle Download PDFInfo
- Publication number
- CN113108855A CN113108855A CN202110393427.2A CN202110393427A CN113108855A CN 113108855 A CN113108855 A CN 113108855A CN 202110393427 A CN202110393427 A CN 202110393427A CN 113108855 A CN113108855 A CN 113108855A
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- Prior art keywords
- connecting pipe
- gear
- detection
- tube
- mass flowmeter
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- 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.)
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Classifications
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- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
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- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
-
- 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
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
Abstract
The invention relates to the technical field of mass flowmeters and discloses a mass flowmeter based on a Coriolis principle, which comprises a connecting pipe, wherein a detection assembly is arranged on one side of the connecting pipe, a conversion instrument is arranged on one side of the connecting pipe, which is far away from the detection assembly, flange plates are fixedly connected to two ends of the connecting pipe, a plurality of threaded holes are uniformly and equidistantly formed in the two flange plates, linkage mechanisms are connected to two ends of the connecting pipe, the detection assembly comprises a shell, a vibration exciter, a detection pipe, a displacement sensor and a temperature sensor, the shell is connected to the connecting pipe, two ends of the detection pipe are fixedly communicated with the connecting pipe, and the vibration exciter is arranged on. This mass flow meter based on coriolis principle, many threaded rods of rotation that can be quick, easy to assemble has improved the installation effectiveness, has guaranteed that the atress of many threaded rods is unanimous and even, can not produce moment of torsion deviation and stress, and fixed effectual, the leakproofness is good, is difficult for revealing.
Description
Technical Field
The invention relates to the technical field of mass flowmeters, in particular to a mass flowmeter based on a Coriolis principle.
Background
The Coriolis mass flowmeter is a device for directly measuring mass flow by utilizing the Coriolis force principle that fluid is in direct proportion to mass flow when flowing in a vibrating pipeline, and comprises a flow detection element and a converter. The Coriolis mass flowmeter has the advantages that the electric signals of the Coriolis mass flowmeter are detected through the displacement sensors on the two sides of the bent pipe, the electric signals are processed again, the mass flow is directly obtained, the Coriolis mass flowmeter needs to be installed on a pipeline through flanges, fixing bolts need to be used for fixing, a plurality of bolts are easy to force unevenly when the fixing bolts are screwed, torque and stress can be generated, the flanges are caused to leak, a plurality of bolts need to be rotated, and the installation efficiency is low.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the mass flow meter based on the Coriolis principle, which has the advantages of being capable of rapidly rotating a plurality of threaded rods, convenient to install, capable of improving the installation efficiency, capable of ensuring that the plurality of threaded rods are stressed uniformly and uniformly, free of torque deviation and stress, good in fixing effect, good in sealing performance, not prone to leakage and the like, and solves the problems that fixing bolts are needed to be used for fixing, when the fixing bolts are screwed, the plurality of bolts are prone to being stressed unevenly, torque and stress can be generated, flanges are prone to leakage, the plurality of bolts need to be rotated, and the installation efficiency is low.
(II) technical scheme
In order to achieve the purposes of improving the installation efficiency, having good fixing effect and good sealing performance and being difficult to leak, the invention provides the following technical scheme: a mass flow meter based on a Coriolis principle comprises a connecting pipe, wherein a detection assembly is arranged on one side of the connecting pipe, a conversion instrument is arranged on one side, away from the detection assembly, of the connecting pipe, flanges are fixedly connected to two ends of the connecting pipe, a plurality of threaded holes are uniformly formed in the two flanges at equal intervals, and linkage mechanisms are connected to two ends of the connecting pipe;
the detection assembly comprises a shell, a vibration exciter, a detection tube, a displacement sensor and a temperature sensor, wherein the shell is connected to the connecting tube, two ends of the detection tube are fixedly communicated with the connecting tube, the vibration exciter is arranged on the outer tube wall at one end, close to the vibration exciter, of the detection tube, the displacement sensor is arranged on the outer tube wall at one end, far away from the vibration exciter, of the detection tube, and the temperature sensor is arranged on the detection tube;
the link gear includes retainer plate, rotation circle, ring gear, a plurality of threaded rod and a plurality of gear, retainer plate fixed connection is on the connecting pipe, it passes through the bearing rotation and connects on the retainer plate to rotate the circle, ring gear fixed connection is on the inner wall of retainer plate, a plurality of the threaded rod set up respectively in the threaded hole that corresponds and with screw hole threaded connection, a plurality of the gear is fixed connection respectively on the threaded rod that corresponds, the ring gear meshes with a plurality of gear mutually, a plurality of the gear all is connected with stabilizing mean.
Preferably, the stabilizing mechanism comprises a plurality of slide holes and a plurality of slide bars, the slide holes are arranged at the positions of the fixing rings corresponding to the threaded rods, the slide bars are respectively fixedly connected at one ends of the corresponding gears far away from the threaded rods, and the slide bars respectively penetrate the corresponding slide holes and are in sliding connection with the slide holes.
Preferably, one side of the rotating ring close to the flange plate is fixedly connected with a plurality of sliding blocks, the flange plate is provided with a sliding groove corresponding to the sliding blocks, the sliding groove is arranged in an annular shape, and the sliding blocks are all connected in the sliding groove in a sliding mode.
Preferably, a ball groove is formed in one end, close to the bottom of the sliding groove, of the sliding block, a ball is connected in the ball groove in a rolling mode, and one end, far away from the bottom of the ball groove, of the ball penetrates through a groove opening of the ball groove and is connected to the bottom of the sliding groove in a rolling mode.
Preferably, the groove opening of the ball groove is closed, and the diameter of the ball is larger than that of the groove opening of the ball groove.
Preferably, one side of the flange plate, which is far away from the connecting pipe, is fixedly connected with a sealing ring.
Preferably, the material of the sealing ring is rubber.
(III) advantageous effects
Compared with the prior art, the invention provides a mass flowmeter based on the Coriolis principle, which has the following beneficial effects:
this mass flow meter based on coriolis principle, many threaded rods of rotation that can be quick, easy to assemble has improved the installation effectiveness, has guaranteed that the atress of many threaded rods is unanimous and even, can not produce moment of torsion deviation and stress, and fixed effectual, the leakproofness is good, is difficult for revealing.
Drawings
Fig. 1 is a schematic structural diagram of a mass flowmeter based on the coriolis principle according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 2;
fig. 4 is an enlarged view of a portion C in fig. 2.
In the figure: the device comprises a connecting pipe 1, a detection assembly 2, a shell 21, a vibration exciter 22, a detection pipe 23, a displacement sensor 24, a temperature sensor 25, a conversion instrument 3, a flange plate 4, a threaded hole 5, a linkage mechanism 6, a fixing ring 61, a rotating ring 62, a gear ring 63, a threaded rod 64, a gear 65, a stabilizing mechanism 7, a sliding hole 71, a sliding rod 72, a sliding block 8, a sliding groove 9, a ball groove 10, balls 11 and a sealing ring 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a mass flowmeter based on the coriolis principle includes a connecting pipe 1, a detection component 2 is disposed on one side of the connecting pipe 1, a conversion instrument 3 is disposed on one side of the connecting pipe 1 away from the detection component 2, flange plates 4 are fixedly connected to both ends of the connecting pipe 1, a plurality of threaded holes 5 are uniformly and equidistantly formed in the two flange plates 4, and a linkage mechanism 6 is connected to both ends of the connecting pipe 1;
the detection assembly 2 comprises a shell 21, a vibration exciter 22, a detection tube 23, a displacement sensor 24 and a temperature sensor 25, wherein the shell 21 is connected to the connecting tube 1, two ends of the detection tube 23 are fixedly communicated with the connecting tube 1, the vibration exciter 22 is arranged on the outer tube wall of one end, close to one end, of the detection tube 23, the displacement sensor 24 is arranged on the outer tube wall of one end, far away from the vibration exciter 22, of the detection tube 23, the temperature sensor 25 is arranged on the detection tube 23, fluid passes through the detection tube 23, the vibration exciter 22 vibrates the detection tube 23, the vibration frequency and the vibration intensity of the detection tube 23 can be influenced when the flow rate, the density and the quality are different, the vibration data of the detection tube 23 are obtained through the displacement sensor 24, and therefore the quality, the flow;
the linkage mechanism 6 comprises a fixed ring 61, a rotating ring 62, a gear ring 63, a plurality of threaded rods 64 and a plurality of gears 65, the fixed ring 61 is fixedly connected on the connecting pipe 1, the rotating ring 62 is rotatably connected on the fixed ring 61 through a bearing, the gear ring 63 is fixedly connected on the inner wall of the fixed ring 61, the threaded rods 64 are respectively arranged in corresponding threaded holes 5 and are in threaded connection with the threaded holes 5, the gears 65 are respectively and fixedly connected on the corresponding threaded rods 64, the gear ring 63 is meshed with the gears 65, the gears 65 are all connected with a stabilizing mechanism 7, when the connecting pipe 1 is required to be connected on a pipeline, the flange plate 4 corresponds to a flange on the pipeline, the rotating ring 62 is rotated, the rotating ring 62 drives the gear ring 63 to rotate, the gear ring 63 drives the gear 65 to rotate, the gear 65 drives the threaded rods 64 to rotate, the threaded rods 64 are screwed into the, threaded rod 64 is fixed flange 4 and pipeline upper flange, and threaded rod 64's the other end passes through the nut to be strengthened fixedly, many threaded rods 64 of rotation that can be quick, and easy to assemble has improved the installation effectiveness, has guaranteed that the atress of many threaded rods is unanimous and even, can not produce moment of torsion deviation and stress, and fixed effectual, the leakproofness is good, is difficult for revealing.
The stabilizing mechanism 7 comprises a plurality of sliding holes 71 and a plurality of sliding rods 72, the plurality of sliding holes 71 are formed in the positions, corresponding to the threaded rods 64, of the fixing ring 61, the plurality of sliding rods 72 are fixedly connected to one ends, far away from the threaded rods 64, of the corresponding gears 65 respectively, and the plurality of sliding rods 72 penetrate through the corresponding sliding holes 71 and are in sliding connection with the sliding holes 71 respectively, so that the threaded rods 64 are more stable and are not prone to deviation and deformation.
One side fixedly connected with a plurality of blocks of sliders 8 that rotate circle 62 and be close to ring flange 4, and spout 9 has been seted up to ring flange 4 corresponding slider 8's position, and spout 9 is the annular setting, and the equal sliding connection of a plurality of blocks of sliders 8 makes rotate circle 62 more firm in spout 9, is difficult for rocking.
The ball groove 10 has been seted up to the one end that slider 8 is close to the spout 9 tank bottom, and ball 11 is connected with in the ball groove 10 roll, and the one end that ball 11 kept away from the ball groove 10 tank bottom passes the notch of ball groove 10 and roll connection at the tank bottom of spout 9, makes slider 8 remove more smoothly, is difficult for blocking.
The notch of the ball groove 10 is closed, and the diameter of the ball 11 is larger than that of the notch of the ball groove 10, so that the ball 11 cannot be separated from the ball groove 10.
One side of the flange plate 4 far away from the connecting pipe 1 is fixedly connected with a sealing ring 12, so that the sealing performance of the flange plate 4 is better.
The sealing ring 12 is made of rubber, so that the sealing ring is more ageing-resistant and has a long service life.
In summary, when the mass flowmeter based on the coriolis principle needs to connect the connecting tube 1 to a pipeline, the flange plate 4 is made to correspond to a flange on the pipeline, the rotating ring 62 is rotated, the rotating ring 62 drives the gear ring 63 to rotate, the gear ring 63 drives the gear 65 to rotate, the gear 65 rotates to drive the threaded rod 64 to rotate, the threaded rod 64 is screwed into the threaded hole 5 and moves, the threaded rod 64 fixes the flange plate 4 and the flange on the pipeline, the other end of the threaded rod 64 is fixed by the nut, the fluid passes through the detecting tube 23, the vibration exciter 22 vibrates the detecting tube 23, the vibration frequency and the strength of the detecting tube 23 are affected when the fluid in the detecting tube 23 vibrates and the flow rate, the density and the mass are different, the vibration data of the detecting tube 23 is obtained by the displacement sensor 24, thereby calculating the mass, the flow rate and the like of the fluid, the installation efficiency is improved, the stress of the threaded rods is guaranteed to be consistent and even, torque deviation and stress cannot be generated, the fixing effect is good, the sealing performance is good, and leakage is not prone to occurring.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A mass flowmeter based on the coriolis principle, comprising a connecting tube (1), characterized in that: a detection assembly (2) is arranged on one side of the connecting pipe (1), a conversion instrument (3) is arranged on one side, away from the detection assembly (2), of the connecting pipe (1), flange plates (4) are fixedly connected to two ends of the connecting pipe (1), a plurality of threaded holes (5) are uniformly formed in the two flange plates (4) at equal intervals, and linkage mechanisms (6) are connected to two ends of the connecting pipe (1);
the detection assembly (2) comprises a shell (21), a vibration exciter (22), a detection tube (23), a displacement sensor (24) and a temperature sensor (25), the shell (21) is connected to the connection tube (1), two ends of the detection tube (23) are fixedly communicated with the connection tube (1), the vibration exciter (22) is arranged on the outer tube wall of the detection tube (23) close to one end, the displacement sensor (24) is arranged on the outer tube wall of the detection tube (23) far away from one end of the vibration exciter (22), and the temperature sensor (25) is arranged on the detection tube (23);
link gear (6) include retainer plate (61), rotate circle (62), ring gear (63), a plurality of threaded rod (64) and a plurality of gear (65), retainer plate (61) fixed connection is on connecting pipe (1), it rotates through the bearing and connects on retainer plate (61) to rotate circle (62), ring gear (63) fixed connection is on the inner wall of retainer plate (61), a plurality of threaded rod (64) set up respectively in corresponding screw hole (5) and with screw hole (5) threaded connection, a plurality of gear (65) fixed connection respectively is on threaded rod (64) that corresponds, ring gear (63) mesh with a plurality of gear (65) mutually, a plurality of gear (65) all are connected with firm mechanism (7).
2. A coriolis based mass flowmeter as set forth in claim 1 wherein: firm mechanism (7) include a plurality of slide opening (71) and a plurality of slide bar (72), a plurality of slide opening (71) are seted up in the position that retainer plate (61) corresponds threaded rod (64), a plurality of slide bar (72) fixed connection respectively is kept away from the one end of threaded rod (64) in gear (65) that correspond, a plurality of slide bar (72) pass corresponding slide opening (71) respectively and with slide opening (71) sliding connection.
3. A coriolis based mass flowmeter as set forth in claim 1 wherein: rotate circle (62) and be close to one side fixedly connected with a plurality of blocks slider (8) of ring flange (4), spout (9) have been seted up to the position that ring flange (4) correspond slider (8), spout (9) are the annular setting, a plurality of equal sliding connection of slider (8) is in spout (9).
4. A coriolis based mass flowmeter as set forth in claim 3 wherein: the ball groove (10) has been seted up to slider (8) one end that is close to spout (9) tank bottom, roll in ball groove (10) and be connected with ball (11), ball (11) are kept away from the one end of ball groove (10) tank bottom and are passed the notch of ball groove (10) and roll connection at the tank bottom of spout (9).
5. A coriolis based mass flowmeter as set forth in claim 4 wherein: the notch of the ball groove (10) is closed, and the diameter of the ball (11) is larger than that of the notch of the ball groove (10).
6. A coriolis based mass flowmeter as set forth in claim 1 wherein: and a sealing ring (12) is fixedly connected to one side, far away from the connecting pipe (1), of the flange plate (4).
7. A coriolis based mass flowmeter as set forth in claim 6 wherein: the sealing ring (12) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110393427.2A CN113108855A (en) | 2021-04-13 | 2021-04-13 | Mass flow meter based on Coriolis principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110393427.2A CN113108855A (en) | 2021-04-13 | 2021-04-13 | Mass flow meter based on Coriolis principle |
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| Publication Number | Publication Date |
|---|---|
| CN113108855A true CN113108855A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110393427.2A Pending CN113108855A (en) | 2021-04-13 | 2021-04-13 | Mass flow meter based on Coriolis principle |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88102107A (en) * | 1987-04-20 | 1988-11-02 | 东机工株式会社 | Mass flowmeter |
| CN1371470A (en) * | 1999-06-30 | 2002-09-25 | 微动公司 | Straight tube Coriolis flowmeter |
| CN1544891A (en) * | 2003-11-18 | 2004-11-10 | 华中科技大学 | Detection equipment of Coriolis mass flow meter |
| CN101858764A (en) * | 2009-04-07 | 2010-10-13 | 西门子（中国）有限公司 | Coriolis mass flowmeter |
| CN101858765A (en) * | 2010-05-24 | 2010-10-13 | 北京航空航天大学 | Quasi-linear tube Coriolis mass flowmeter |
| CN102652253A (en) * | 2009-12-14 | 2012-08-29 | 西门子公司 | Method for operating a coriolis mass flow rate meter and coriolis mass flow rate meter |
| CN103076053A (en) * | 2012-12-31 | 2013-05-01 | 孙晓君 | Mass flowmeter |
| CN202938862U (en) * | 2012-10-31 | 2013-05-15 | 厦门均溪自控有限公司 | Coriolis mass flowmeter |
| CN104296811A (en) * | 2014-10-24 | 2015-01-21 | 成都安迪生测量有限公司 | Mass-flow liquid flowmeter |
| CN104406645A (en) * | 2014-11-07 | 2015-03-11 | 孙晓君 | Mass flow sensor |
| CN108871481A (en) * | 2018-09-06 | 2018-11-23 | 成都赫泰智能科技有限公司 | A kind of plus hydrogen super-pressure coriolis mass flowmeters |
| CN208653554U (en) * | 2018-07-26 | 2019-03-26 | 合肥精大仪表股份有限公司 | A kind of extra small bore vortex-shedding meter |
| CN208765776U (en) * | 2018-06-04 | 2019-04-19 | 高准有限公司 | Coriolis mass flowmeters |
| CN111670343A (en) * | 2018-02-02 | 2020-09-15 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis measuring transducer and coriolis measuring device |
| CN112208196A (en) * | 2020-09-16 | 2021-01-12 | 马鞍山虹润彩印有限责任公司 | Green's food packaging film printing special printing mechanism |
| CN112229453A (en) * | 2020-10-04 | 2021-01-15 | 西安德厚电子科技有限公司 | Vortex flowmeter convenient to adjust |
-
2021
- 2021-04-13 CN CN202110393427.2A patent/CN113108855A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88102107A (en) * | 1987-04-20 | 1988-11-02 | 东机工株式会社 | Mass flowmeter |
| CN1371470A (en) * | 1999-06-30 | 2002-09-25 | 微动公司 | Straight tube Coriolis flowmeter |
| CN1544891A (en) * | 2003-11-18 | 2004-11-10 | 华中科技大学 | Detection equipment of Coriolis mass flow meter |
| CN101858764A (en) * | 2009-04-07 | 2010-10-13 | 西门子（中国）有限公司 | Coriolis mass flowmeter |
| CN102652253A (en) * | 2009-12-14 | 2012-08-29 | 西门子公司 | Method for operating a coriolis mass flow rate meter and coriolis mass flow rate meter |
| CN101858765A (en) * | 2010-05-24 | 2010-10-13 | 北京航空航天大学 | Quasi-linear tube Coriolis mass flowmeter |
| CN202938862U (en) * | 2012-10-31 | 2013-05-15 | 厦门均溪自控有限公司 | Coriolis mass flowmeter |
| CN103076053A (en) * | 2012-12-31 | 2013-05-01 | 孙晓君 | Mass flowmeter |
| CN104296811A (en) * | 2014-10-24 | 2015-01-21 | 成都安迪生测量有限公司 | Mass-flow liquid flowmeter |
| CN104406645A (en) * | 2014-11-07 | 2015-03-11 | 孙晓君 | Mass flow sensor |
| CN111670343A (en) * | 2018-02-02 | 2020-09-15 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis measuring transducer and coriolis measuring device |
| CN208765776U (en) * | 2018-06-04 | 2019-04-19 | 高准有限公司 | Coriolis mass flowmeters |
| CN208653554U (en) * | 2018-07-26 | 2019-03-26 | 合肥精大仪表股份有限公司 | A kind of extra small bore vortex-shedding meter |
| CN108871481A (en) * | 2018-09-06 | 2018-11-23 | 成都赫泰智能科技有限公司 | A kind of plus hydrogen super-pressure coriolis mass flowmeters |
| CN112208196A (en) * | 2020-09-16 | 2021-01-12 | 马鞍山虹润彩印有限责任公司 | Green's food packaging film printing special printing mechanism |
| CN112229453A (en) * | 2020-10-04 | 2021-01-15 | 西安德厚电子科技有限公司 | Vortex flowmeter convenient to adjust |
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Application publication date: 20210713 |
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