CN110608780A - Buffer flow divider for mass flowmeter, mass flowmeter and measuring system - Google Patents
Buffer flow divider for mass flowmeter, mass flowmeter and measuring system Download PDFInfo
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- CN110608780A CN110608780A CN201911035051.7A CN201911035051A CN110608780A CN 110608780 A CN110608780 A CN 110608780A CN 201911035051 A CN201911035051 A CN 201911035051A CN 110608780 A CN110608780 A CN 110608780A
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- 239000012530 fluid Substances 0.000 claims abstract description 47
- 238000013016 damping Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 27
- 238000005259 measurement Methods 0.000 abstract description 22
- 230000006355 external stress Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 230000002411 adverse Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G01F1/76—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
- 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
- G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure
- G01F15/105—Preventing damage by hydraulic shocks
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a buffer diverter for a mass flow meter, a mass flow meter and a measuring system. The damping flow divider is arranged at a fluid inlet and/or a fluid outlet of the mass flow meter and is provided with a linear pipeline section for passing through fluid, and a damping part for reducing impact vibration of the fluid is arranged on the outer wall and/or the inner wall of at least one part of the linear pipeline section. By adopting the invention, the interference factors from external stress, vibration or impact and the like can be obviously reduced or even eliminated, so that the measurement precision and reliability can be effectively improved, and the problems of zero drift, poor measurement stability and reliability and the like in the conventional flow measurement equipment are solved.
Description
Technical Field
The invention relates to the technical field of flow measurement, in particular to a buffer flow divider for a mass flowmeter, the mass flowmeter and a measurement system comprising the mass flowmeter.
Background
In the field of flow measurement, there are many types of mass flow meters, but these existing products have some drawbacks and deficiencies in aspects such as structural configuration, ease of use, measurement accuracy and reliability. For example, coriolis mass flowmeter is a flowmeter capable of directly measuring the mass of a medium, and is often used for trade settlement and industrial flow detection, however, in the field use process, due to the influence of a fluid line, stress, vibration, impact and the like are transmitted to a measuring elbow of the coriolis mass flowmeter, so that the inherent vibration frequency and amplitude are changed to influence the equipment performance, and therefore, instrument manufacturers and users not only often encounter the problems of zero drift, stability and the like of such a mass flowmeter, but also the problems are difficult to solve, which is a main factor that causes the limited development of the mass flowmeter.
Disclosure of Invention
In view of the above, the present invention provides a buffer diverter for a mass flow meter, a mass flow meter and a measurement system comprising the mass flow meter, which may solve or at least alleviate one or more of the above problems or other problems in the prior art.
First, according to a first aspect of the present invention, there is provided a damping flow divider for a mass flow meter, the damping flow divider being arranged at a fluid inlet and/or a fluid outlet of the mass flow meter and being provided with a linear pipe section through which a fluid passes, at least a portion of the linear pipe section being provided with a damping portion on an outer wall and/or an inner wall thereof for reducing fluid impact vibrations.
In the damping flow divider according to the present invention, optionally, the damping flow divider is further provided with a curved section communicating with the linear duct section.
In the damping flow divider according to the present invention, optionally, the damping portion comprises one or more annular grooves arranged around the circumference of the linear duct section.
Further according to the second aspect of the invention, there is provided a mass flow meter comprising at least one damping shunt for a mass flow meter as described in any of the above.
In the mass flow meter according to the present invention, optionally, the mass flow meter includes a first buffer flow divider and a second buffer flow divider, and the mass flow meter further includes:
a first connection and a second connection disposed at a fluid inlet and a fluid outlet of the mass flow meter, respectively, and connected to one end of the first buffer splitter and one end of the second buffer splitter, respectively, for connecting the mass flow meter to an external fluid source for introducing a fluid to flow through the mass flow meter;
the two ends of the middle tube are respectively communicated with the other end of the first buffer shunt and the other end of the second buffer shunt, and a first detection coil, a second detection coil and a driving coil positioned between the first detection coil and the second detection coil are arranged on the outer wall of the middle tube; and
and a transducer connected to the first detection coil, the second detection coil, and the drive coil via signal lines, and configured to calculate fluid flow data based on signals detected by the first detection coil and the second detection coil.
In the mass flow meter according to the present invention, optionally, the mass flow meter further includes:
a damping fixture mounted on an outer wall of the intermediate tube and disposed at a location of the intermediate tube adjacent to the first cushioning diverter and/or the second cushioning diverter; and/or
A housing coupled to the first connection, the second connection, the first buffer diverter, and/or the second buffer diverter and provided with a cavity for receiving at least a portion of each of the first buffer diverter, the second buffer diverter, and the intermediate tube therein with a gap maintained between the intermediate tube and an inner wall of the housing. Therefore, the intermediate pipe is not in direct contact with the inner wall of the shell, so that the transmission paths of fluid stress, vibration, impact and the like are further blocked, the original working vibration mode of the intermediate pipe is prevented from being interfered by adverse effects, the excellent working performance of the mass flowmeter can be better ensured, and the problems of zero drift, unstable measuring performance and the like commonly existing in the existing mass flowmeter are solved.
In the mass flow meter according to the invention, optionally, the casing is welded to the linear pipe sections of the first and second damping diverters.
In the mass flow meter according to the present invention, optionally, the intermediate tube is configured in a U-shape, and the first connection portion and the second connection portion are symmetrically arranged with respect to the intermediate tube, the first buffer shunt and the second buffer shunt are symmetrically arranged with respect to the intermediate tube, the driving coil is arranged in the middle of the intermediate tube, and the first detection coil and the second detection coil are symmetrically arranged on outer walls of both side tube segments of the intermediate tube.
In the mass flow meter according to the present invention, optionally, the first connection portion and the second connection portion are each configured in a flange shape for connecting the mass flow meter to the external fluid source through a connection member.
According further to the third aspect of the invention, there is also provided a measurement system in which one or more mass flowmeters as defined in any one of the preceding claims are provided.
The principles, features, characteristics, advantages and the like of various technical solutions according to the present invention will be clearly understood in the following detailed description in conjunction with the accompanying drawings. By adopting the technical scheme of the invention, the interference factors from external stress, vibration or impact and the like can be effectively reduced or prevented, the measurement precision and reliability of the mass flowmeter are obviously improved, and the problems of zero drift, poor measurement stability and reliability and the like of the conventional mass flowmeter in the using process are successfully solved. The invention adopts an integrated design, has very compact structure, can be directly installed and used without additionally adding a buffer device, and is very time-saving and labor-saving.
Drawings
The present invention will be described in further detail below with reference to the drawings and examples, but it should be understood that the drawings are designed solely for purposes of illustration and are not necessarily drawn to scale, but rather are intended to conceptually illustrate the structural configurations described herein.
Fig. 1 is a schematic cross-sectional view of an embodiment of a mass flow meter according to the present invention.
Fig. 2 is a cross-sectional structural schematic diagram of an example buffer diverter in the mass flow meter embodiment shown in fig. 1.
Detailed Description
First, it should be noted that the structures, compositions, features, advantages, and the like of the buffer flow divider for a mass flow meter, the mass flow meter, and the measurement system including the mass flow meter of the present invention will be specifically described below by way of examples, however, all the descriptions are for illustrative purposes only, and they should not be construed as forming any limitation to the present invention. In this document, the technical terms "first" and "second" are used for distinguishing expression purposes only and are not intended to indicate their order or relative importance, and the technical term "connected" and its derivatives mean that a specific component is directly and/or indirectly connected to another component. In addition, general matters already known to those skilled in the art are not described herein in detail for the sake of clarity.
Furthermore, to any single feature described or implicit in an embodiment or any single feature shown or implicit in each figure or shown or implicit in each figure, the invention still allows any combination or permutation to be continued between the features (or their equivalents) without any technical barriers, so that further embodiments according to the invention should also be considered within the scope of this description.
Referring to fig. 1 and 2 in combination, a general construction of an example of a mass flow meter according to the present invention and an example of a damping flow divider incorporated therein is schematically shown in the respective figures, and the present invention will be exemplarily described by the above embodiments.
As shown in fig. 1, two buffer shunts 1 each having a buffer portion 13 are provided in this mass flow meter 100, and they are respectively arranged at a fluid inlet 9 and a fluid outlet 10 of the mass flow meter 100, and may be connected to a connection portion 3 and an intermediate pipe 6 in the mass flow meter 100, respectively, using a connection means such as welding. In the present embodiment, the two buffer shunts 1 are constructed to have the identical structure, and they are arranged symmetrically in the mass flow meter 100. According to the design concept of the present invention, by providing the above-mentioned buffer flow divider 1, a good effect of significantly reducing adverse effects of the fluid introduced from the external fluid source (such as a working pipe in an environment to be measured) on the stress, the impact, the vibration and the like of the mass flow meter can be achieved, and even a mass flow meter without the influence of the external fluid stress can be realized.
Specifically, referring to fig. 1 and 2, the damping flow divider 1 may be configured to have a straight pipe section 11 and a curved section 12 communicating with each other for fluid to flow therethrough. In a particular application, the linear duct section 11 may be configured to have a cross-sectional shape that is circular, elliptical, square, or other suitable shape, and the curved section 12 may be configured to have exactly the same cross-sectional shape as the linear duct section 11, or may have cross-sectional shapes that are different from each other.
By way of illustration, one or more annular grooves may be constructed in the linear duct section 11 to achieve the effect of damping, accelerating the elimination of disturbing influences from external fluids. For example, the annular groove or grooves may be arranged on a part of or all of the outer wall and/or the inner wall of the linear duct section 11 around the circumference of the linear duct section 11 to serve as the above-described buffer 13. In the case of a plurality of annular grooves arranged side by side, the plurality of annular grooves of the straight pipe section 11 exhibit a zigzag structure in longitudinal section. The tooth shape and the tooth pitch of the sawtooth structure can be adjusted as required, so that the effect of optimally slowing down or even completely preventing the transmitted stress, vibration or impact is realized by combining the specific structural form and the component parts of the mass flowmeter. As shown in fig. 1, when the mass flowmeter 100 is installed for use, a fluid will flow in the flow direction indicated by arrows a and B, and stress, vibration, shock, or the like in the fluid line will be transmitted to the damping flow divider 1 through the connection portion 3 at the fluid inlet 9 on the left side, since the damping flow divider 1 is provided with the linear pipe section 11, and in the linear pipe section 11, the damping portion 13, such as an annular groove structure, is further provided, and the above structural arrangements will effectively increase the transmission space and accelerate the discharge speed of the above stress, vibration, shock, or the like, or even cause it to disappear completely. Therefore, the transmission of the stress, the vibration or the impact in the mass flow meter 100 can be remarkably slowed down or even thoroughly prevented, so that the measurement work of the mass flow meter cannot be influenced or basically cannot be influenced by the external interference factors, the performance of the measuring device can be remarkably improved, and the accuracy and the reliability of the measured data are powerfully guaranteed.
In the mass flow meter 100 shown in fig. 1, it is possible to configure the intermediate pipe 6 in a U-shape with both ends thereof connected to the respective bent sections 12 of the two buffer shunts 1, respectively, and to arrange two detection coils 5 and a driving coil 7 therebetween on the outer wall of the intermediate pipe 6, both of the detection coils 5 and the driving coil 7 being connected to the transmitter 8 through signal lines. For the sake of convenience of manufacture and installation, the drive coil 7 may optionally be arranged in the middle of the intermediate tube 6, while the two connecting portions 3, the two buffer shunts 1 and the two detection coils 5 described above are also optionally arranged symmetrically with respect to the intermediate tube 6.
When the driving coil 7 is applied with an excitation voltage, the intermediate tube 6 will vibrate in a reciprocating cycle, so that a coriolis force effect will be generated when the fluid flows through the intermediate tube 6. When the two side tube portions of the middle tube 6 generate torsional vibration, the detection coils 5 respectively installed at the outer walls of the two side tube portions will generate two sets of detection signals with different phases, and the phase difference between the two sets of detection signals is proportional to the mass flow rate of the fluid flowing through, so that the transmitter 8 can calculate the flow rate data of the fluid accordingly. As described above, since the damping shunt 1 having the damping portion 13 is innovatively disposed in the mass flow meter 100, adverse effects caused by fluid stress, vibration or shock can be significantly reduced or even eliminated, which can be released, buffered or completely eliminated in advance before being transmitted to the intermediate pipe, so as to reduce or prevent adverse effects on the above-mentioned working vibration mode of the intermediate pipe 6, thereby ensuring stability of vibration measurement, avoiding the natural vibration frequency and amplitude from being changed, successfully solving the problems of zero drift, poor measurement stability and the like commonly existing in the existing mass flow meter, and ensuring accuracy and reliability of flow measurement data.
Referring again to fig. 1, an optional housing 2 and damping fixture 4 are also provided in the mass flow meter 100. The outer shell 2 can be fixedly mounted on the linear pipe sections 11 of the two buffer flow splitters 1 by adopting a connection mode such as welding, riveting or screwing, and the like, and a cavity of the outer shell 2 can be utilized to accommodate a part or all of the buffer flow splitter 1, the middle pipe 6, the detection coil 5, the driving coil 7 and the damping fixing piece 4 so as to not only play a role in protection, but also be beneficial to forming an integrated integral compact structure. In addition, the intermediate pipe 6 is arranged to keep a gap with the inner wall of the shell 2 without direct contact, so that the transmission path of fluid stress, vibration, impact and the like is further blocked, the original working vibration mode of the intermediate pipe 6 is prevented from being interfered by adverse effects, the excellent working performance of the mass flowmeter can be better ensured, and the problems of zero drift, unstable measuring performance and the like commonly existing in the existing mass flowmeter are solved. In addition, by optionally providing one or more damping fixtures 4 on the outer wall of the intermediate pipe 6, for example, at the position where the intermediate pipe 6 is adjacent to the two damping shunts 1, the above-mentioned negative effects of fluid stress, vibration or shock on the measurement work can be further reduced or even eliminated.
It should be noted that the above is only an exemplary illustration of the present invention based on the embodiments illustrated in fig. 1 and 2, but it should be understood that the present invention can be flexibly designed, modified or adjusted according to the actual application requirements without departing from the gist of the present invention.
For example, the connection portion 3 is configured in the flange shape in the illustrated embodiment, so that the mass flow meter 100 can be connected to an external fluid source using a connector such as a bolt, a nut, or the like. However, in practice, the invention allows the connection portion 3 to take any other possible form of construction, and it is also conceivable to connect the housing 2 to the connection portion 3 instead. Further, for the two connection portions 3 in the mass flow meter 100, in order to facilitate operations such as manufacturing, assembling, and maintenance, they may be configured to be identical to each other, but in some applications, they may be configured to be different, and they may also be arranged asymmetrically in the mass flow meter.
By way of further example, the damping shunt according to the present invention may be designed, manufactured and sold separately, and in a specific application, only one damping shunt may be disposed in the mass flow meter, for example, only disposed at the fluid inlet or the fluid outlet of the mass flow meter, and when the damping shunt is disposed at the fluid outlet, the damping shunt may also effectively increase the transmission space and reduce the interference effect of fluid stress, vibration or impact. Furthermore, in some embodiments, the curved section 12 in the damping flow divider 1 shown in fig. 2 can be omitted, and only the straight line pipe section 11 can be provided for a direct connection to the intermediate pipe 6, i.e. the transitional connection between the damping flow divider 1 and the intermediate pipe 6 can be provided on the intermediate pipe 6.
In addition, according to the design concept of the invention, a measurement system is also provided, one or more mass flowmeters designed according to the invention can be configured and used on the measurement system, and due to the innovative structural improvement design inside the mass flowmeters, additional equipment and additional measures are not required to be added during installation and use, so that the field measurement can be performed very conveniently, efficiently, accurately and reliably, and the problems of zero drift, poor measurement stability and reliability and the like commonly existing in the existing mass flowmeters can be overcome, so that the outstanding advantages of the invention over the prior art are realized.
The buffer divider for a mass flow meter, the mass flow meter and the measurement system including the mass flow meter according to the present invention have been explained in detail above by way of examples only, which are provided only for illustrating the principle of the present invention and the implementation thereof, and not for limiting the present invention, and those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to be included within the scope of this invention and defined in the claims which follow.
Claims (10)
1. A damping flow divider (1) for a mass flow meter (100), characterized in that the damping flow divider (1) is arranged at a fluid inlet (9) and/or a fluid outlet (10) of the mass flow meter (100) and is provided with a linear pipe section (11) through which a fluid passes, a damping portion (13) for reducing fluid impact vibrations being provided on an outer wall and/or an inner wall of at least a part of the linear pipe section (11).
2. The damping diverter (1) according to claim 1, wherein the damping diverter (1) is further provided with a curved section (12) communicating with the linear duct section (11).
3. The damping diverter (1) according to claim 1 or 2, wherein the damping portion (13) comprises one or more annular grooves arranged around the circumference of the rectilinear pipe section (11).
4. A mass flow meter (100) characterized in that it comprises at least one damping flow divider (1) for a mass flow meter (100) according to any of claims 1-3.
5. A mass flow meter (100) according to claim 4, wherein the mass flow meter (100) comprises a first and a second buffer shunt, and the mass flow meter (100) further comprises:
-a first and a second connection, provided at a fluid inlet (9) and a fluid outlet (10) of the mass flow meter (100), respectively, and connected to one end of the first and the second buffer splitter, respectively, for connecting the mass flow meter (100) to an external fluid source for introducing a fluid flowing through the mass flow meter (100);
the two ends of the middle tube (6) are respectively communicated with the other end of the first buffer shunt and the other end of the second buffer shunt, and a first detection coil, a second detection coil and a driving coil (7) positioned between the first detection coil and the second detection coil are arranged on the outer wall of the middle tube (6); and
and a transmitter (8) connected to the first detection coil, the second detection coil, and the drive coil (7) via signal lines, and configured to calculate fluid flow data from signals detected by the first detection coil and the second detection coil.
6. A mass flow meter (100) according to claim 5, wherein the mass flow meter (100) further comprises:
a damping fixture (7) mounted on the outer wall of the intermediate pipe (6) and arranged at a position of the intermediate pipe (6) adjacent to the first and/or second damping shunt; and/or
-a housing (2) connected to the first connection, the second connection, the first buffer diverter and/or the second buffer diverter and provided with a cavity for receiving therein at least a portion of each of the first buffer diverter, the second buffer diverter and the intermediate pipe (6) with a gap maintained between the intermediate pipe (6) and an inner wall of the housing (2).
7. A mass flow meter (100) according to claim 6, wherein the casing (2) is welded to the linear conduit section (11) of the first damping flow divider and the linear conduit section (11) of the second damping flow divider.
8. A mass flow meter (100) according to claim 5, wherein the intermediate tube (6) is configured in a U-shape, and the first and second connection portions are symmetrically arranged with respect to the intermediate tube (6), the first and second buffer flow dividers are symmetrically arranged with respect to the intermediate tube (6), the drive coil (7) is arranged in the middle of the intermediate tube (6), and the first and second detection coils are symmetrically arranged on the outer walls of both side tube segments of the intermediate tube (6).
9. A mass flow meter (100) according to any of claims 5-8, wherein the first and second connections are each configured in the shape of a flange for connecting the mass flow meter (100) to the external fluid source via a connection.
10. A measuring system, characterized in that one or more mass flow meters (100) according to any of claims 4-9 are arranged in the measuring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035051.7A CN110608780A (en) | 2019-10-29 | 2019-10-29 | Buffer flow divider for mass flowmeter, mass flowmeter and measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911035051.7A CN110608780A (en) | 2019-10-29 | 2019-10-29 | Buffer flow divider for mass flowmeter, mass flowmeter and measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN110608780A true CN110608780A (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911035051.7A Pending CN110608780A (en) | 2019-10-29 | 2019-10-29 | Buffer flow divider for mass flowmeter, mass flowmeter and measuring system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04343026A (en) * | 1991-05-20 | 1992-11-30 | Tokico Ltd | Mass flowmeter or density sensor |
| CN101943592A (en) * | 2010-09-17 | 2011-01-12 | 四川中测流量科技有限公司 | High-pressure gas flow meter of U-shaped measuring pipe |
| CN102494726A (en) * | 2011-11-18 | 2012-06-13 | 青岛澳波泰克安全设备有限责任公司 | Coriolis mass flow meter, vibrating pipe density meter and vibrating sheet used in vibrating pipe density meter |
| CN108679330A (en) * | 2018-08-03 | 2018-10-19 | 平湖市飞天人图文设计有限公司 | A kind of water pipeline structure |
| CN208043152U (en) * | 2018-02-05 | 2018-11-02 | 苏州化工仪表有限公司 | A kind of mass flowmenter for chemicals production |
| CN211576268U (en) * | 2019-10-29 | 2020-09-25 | 上海洛丁森工业自动化设备有限公司 | Buffer flow divider for mass flowmeter, mass flowmeter and measuring system |
-
2019
- 2019-10-29 CN CN201911035051.7A patent/CN110608780A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04343026A (en) * | 1991-05-20 | 1992-11-30 | Tokico Ltd | Mass flowmeter or density sensor |
| CN101943592A (en) * | 2010-09-17 | 2011-01-12 | 四川中测流量科技有限公司 | High-pressure gas flow meter of U-shaped measuring pipe |
| CN102494726A (en) * | 2011-11-18 | 2012-06-13 | 青岛澳波泰克安全设备有限责任公司 | Coriolis mass flow meter, vibrating pipe density meter and vibrating sheet used in vibrating pipe density meter |
| CN208043152U (en) * | 2018-02-05 | 2018-11-02 | 苏州化工仪表有限公司 | A kind of mass flowmenter for chemicals production |
| CN108679330A (en) * | 2018-08-03 | 2018-10-19 | 平湖市飞天人图文设计有限公司 | A kind of water pipeline structure |
| CN211576268U (en) * | 2019-10-29 | 2020-09-25 | 上海洛丁森工业自动化设备有限公司 | Buffer flow divider for mass flowmeter, mass flowmeter and measuring system |
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