CN216954664U - Coriolis mass flowmeter with high measurement accuracy - Google Patents
Coriolis mass flowmeter with high measurement accuracy Download PDFInfo
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- CN216954664U CN216954664U CN202220596098.1U CN202220596098U CN216954664U CN 216954664 U CN216954664 U CN 216954664U CN 202220596098 U CN202220596098 U CN 202220596098U CN 216954664 U CN216954664 U CN 216954664U
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Abstract
The utility model belongs to the technical field of flow measurement. Based on the problem that the measurement precision is difficult to control due to uneven flow distribution of the existing mass flowmeter, the utility model discloses a Coriolis mass flowmeter with high measurement precision, which structurally comprises a cyclone assembly; the mass flow meter comprises a flow splitting assembly and a mass flow meter body; the flow dividing assembly comprises a liquid inlet section and a flow dividing section which are communicated with each other; the flow dividing section is provided with a main channel; the transition channel is linear; a flow guide ring; a through guide groove is arranged at the central position of the guide ring; the longitudinal section of the diversion trench is conical; a shunting cavity; the axis of the diversion cavity and the axis of the transition channel are on the same straight line; the shunt cone is of an axisymmetric structure and is arranged in the middle of the inner wall of the shunt cavity; the symmetrical axis of the splitter cone and the axis of the transition channel are on the same straight line; the reposition of redundant personnel passageway is a plurality of, along the bottom circumference equipartition setting of reposition of redundant personnel awl. The mass flowmeter has even flow distribution and high measurement precision.
Description
Technical Field
The utility model belongs to the technical field of flow measurement, and particularly relates to a Coriolis mass flowmeter with high measurement precision.
Background
Coriolis mass flowmeters are devices that measure the mass of a fluid flowing in a measuring tube based on the coriolis effect. Coriolis mass flowmeters have been increasingly used because of their advantages of accurate measurement, applicability to various media, and the like. Specifically, the measuring tube is vibrated synchronously, and simultaneously, fluid is introduced into the tube to flow forwards along the tube, the measuring tube forces the fluid to vibrate up and down together with the fluid, the fluid gives a reaction force perpendicular to the flowing direction of the measuring tube to resist the forced vibration, and under the action of the force called Coriolis effect, the phase difference occurs between the inlet section and the outlet section of the measuring tube in the vibration time sequence. The phase difference is proportional to the magnitude of the fluid mass flow through the measurement tube; the circuit detects the magnitude of the phase difference, and the magnitude of the mass flow can be determined.
In the prior art, the measuring tubes of coriolis mass flowmeters are mostly arranged as two parallel lines and are branched off by a flow divider. In order to ensure the measurement accuracy of a coriolis mass flowmeter, it is necessary to ensure that the flow in the two measuring tubes is exactly the same.
However, in practical use, it is difficult to ensure that the flow divider uniformly divides the flow into the two measuring tubes, so that the measuring accuracy of the coriolis mass flowmeter is difficult to control.
SUMMERY OF THE UTILITY MODEL
Based on the above-mentioned problem that it is difficult to ensure the consistency of the fluid in the two measuring tubes during the flow splitting of the conventional coriolis mass flowmeter, and thus the measurement accuracy of the coriolis mass flowmeter is difficult to control, it is an object of the present invention to provide a coriolis mass flowmeter with high measurement accuracy, which can uniformly split the flow to the measuring tubes, and thus is advantageous for improving the measurement accuracy of the coriolis mass flowmeter.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a Coriolis mass flowmeter with high measurement accuracy comprises a cyclone assembly for uniformly mixing fluid; the flow dividing assembly is communicated with the rotational flow assembly to divide the fluid; the mass flowmeter body is communicated with the flow dividing assembly.
The flow dividing assembly comprises a liquid inlet section and a flow dividing section which are communicated with each other; the liquid inlet section is communicated with the rotational flow component.
The flow dividing section is communicated with the liquid inlet section, is provided with a main channel and is communicated with the liquid inlet section; the transition channel is linear and is communicated with the main channel; the flow guide ring is arranged at the connecting position of the main channel and the transition channel; a through guide groove is formed in the center of the guide ring; the longitudinal section of the diversion trench is conical; the small opening end of the diversion trench is communicated with the transition channel; the flow dividing cavity is communicated with the transition channel; the axis of the diversion cavity and the axis of the transition channel are on the same straight line; the shunting cone is of an axisymmetric structure and is arranged in the middle of the inner wall of the shunting cavity; the symmetrical axis of the splitter cone and the axis of the transition channel are on the same straight line; the reposition of redundant personnel passageway, it is a plurality of, follow the bottom circumference equipartition setting of reposition of redundant personnel awl, one end with reposition of redundant personnel chamber intercommunication, the other end with the survey buret intercommunication of mass flow meter main part.
In one of the technical solutions disclosed in the present invention, the cyclone assembly includes:
a pipeline is arranged in the pipeline, and the pipeline is arranged in the pipeline,
a flow guide disposed in the pipe to swirl a fluid, having:
a mounting rod located within the duct;
the blades are spiral and are arranged on the mounting rod; and the two ends of the blade are fixedly connected with the inner wall of the pipeline.
In one of the technical solutions disclosed in the present invention, the swirl assembly further includes a rectifying plate disposed at an outlet of the conduit.
In one of the technical solutions disclosed in the present invention, the front end of the mounting rod is tapered.
In one of the technical solutions disclosed in the present invention, the liquid inlet section includes:
a linear section and a curved section communicating with each other;
the straight section is communicated with the cyclone assembly;
the curved section and the straight section are in smooth transition; the curved section is in communication with the main channel.
In one of the technical solutions disclosed in the present invention, a plurality of annular protrusions are provided on the outer peripheral wall of the linear section.
In one of the technical solutions disclosed in the present invention, a plurality of annular protrusions are disposed on an inner circumferential wall of the linear section.
In one of the technical solutions disclosed in the present invention, the inner wall of the diversion cavity is streamlined.
In one of the technical solutions disclosed in the present invention, the diameter of the transition passage is smaller than the diameter of the main passage.
As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are:
1. the rotational flow component is arranged to enable fluid to generate rotational flow, so that the fluid is uniformly mixed; furthermore, the flow dividing assembly is provided with a bending section, the flowing direction of the fluid is converted from horizontal to vertical, and the influence of the gravity of the fluid on the flow dividing can be avoided; furthermore, after being guided by the guide groove, the fluid gathers along the axis and is divided by a splitter cone with a cone end positioned on the axis; meanwhile, the flow dividing cavity is designed into a streamline shape, so that the fluid can be prevented from generating eddy, and uniform flow dividing is facilitated; the cooperation of the four parts can lead the fluid to be evenly divided, and is beneficial to improving the measurement precision of the mass flowmeter.
2. A rectifying plate is arranged at the outlet of the rotational flow component, so that disturbance generated by rotational flow can be eliminated; meanwhile, a plurality of annular bulges are arranged on the outer peripheral wall or the inner peripheral wall of the straight line section of the liquid inlet section side by side, so that the vibration or impact effect of the fluid can be relieved and prevented; the two are matched, so that the influence of the external force of the measuring pipe of the mass flow meter can be avoided, and the measurement precision can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a front view of the present invention.
FIG. 2 is a schematic cross-sectional view of a swirler assembly of the present invention.
Fig. 3 is a schematic cross-sectional view of a shunt assembly of the present invention.
Reference numerals: 1-a cyclone assembly; 11-a pipeline; 12-a flow guide; 121-a mounting bar; 122-a blade; 13-a rectifying plate; 2-a flow splitting assembly; 21-liquid inlet section; 211-straight line section; 212-a curved section; 213-an annular projection; 22-a flow splitting section; 221-a main pipeline; 222-a transition duct; 223-a shunting cavity; 224-a flow-splitting channel; 225-a flow guide ring; 226-a splitter cone; and 3-mass flow meter main body.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Based on the fact that the existing Coriolis mass flow meter mostly adopts two measuring tubes which are arranged in parallel, when the existing flow divider is used for flow dividing, the flow dividing is uneven, and therefore the measuring precision is influenced; meanwhile, vibration, impact and the like of the fluid line can be transmitted to the measuring pipe of the mass flow meter, and the measuring precision is also influenced; the embodiment of the utility model discloses a Coriolis mass flowmeter with high measurement precision, which is structurally shown in the accompanying drawings 1-3 and comprises a rotational flow component 1, a flow dividing component 2 and a mass flowmeter main body 3. The Coriolis mass flowmeter has uniform flow distribution and high measurement accuracy.
Specifically, the swirling assembly 1 is used for uniformly mixing a fluid, and includes a pipe 11, a flow guide 12, and a rectifying plate 13.
A deflector 12 is provided within the pipe 11 to impart a swirling flow to the fluid, and includes a mounting rod 121 and vanes 122. The blades 122 are helical and are mounted on the mounting rod 121, and two ends of the blades 122 are fixedly connected with the inner wall of the pipeline 11. In this embodiment, the forward end of the mounting rod 121 is tapered to facilitate fluid entry into the blade 122.
The rectifying plate 13 is provided near the outlet of the duct 11.
By adopting the structure, after entering the pipeline 11, the fluid generates rotational flow along with the flow guide piece 12 so as to uniformly mix the fluid; subsequently, the fluid flows through the rectifying plate 13, and disturbance caused by the fluid rotational flow is eliminated, so that the detection result is prevented from being influenced.
The flow dividing assembly 2 is communicated with the pipeline 11 and the mass flowmeter body 3 and comprises a liquid inlet section 21 and a flow dividing section 22 which are communicated with each other.
Wherein the inlet section 21 has a straight section 211 and a curved section 212. The inner or outer wall of the straight section 211 is provided with a plurality of annular protrusions 213 side by side, i.e. the annular protrusions 213 are zigzag-shaped in longitudinal section. By adopting the structure, the vibration or impact effect of the fluid on the pipe fitting can be slowed down and prevented, the influence on the mass flowmeter main body 3 is avoided, and the measurement precision of the mass flowmeter is favorably improved. The curved section 212 and the straight section 211 communicate and smoothly transition.
The flow splitting section 22 communicates with the curved section 212 and includes a main channel 221, a transition channel 222, a flow splitting cavity 223, a flow splitting channel 224, a flow guide ring 225 and a flow splitting cone 226.
Wherein the main channel 221 and the curved section 212 communicate.
The transition passage 222 is linear and communicates with the main passage 221, and the diameter of the transition passage 222 is smaller than that of the main passage 221.
The baffle ring 225 is disposed at the connection position of the main channel 221 and the transition channel 222, and a through baffle groove is disposed at the center position thereof. The longitudinal cross-section of the flow guide groove is conical, and the axis of the flow guide groove is in the same straight line with the axis of the transition passage 222. The small mouth end of the channel communicates with the transition passage 222. By adopting the structure, the axial flow of the fluid can be kept, and the uniform flow distribution is facilitated.
The branch chamber 223 communicates with the transition passage 222 with its axis on the same line as the axis of the transition passage 222. The inner wall of the distribution chamber 223 is streamlined. By adopting the structure, the backflow or vortex caused by the collision of the fluid can be avoided, and the uniform flow distribution is facilitated.
The diverging cone 226 is an axisymmetric structure, and is disposed at the middle position of the inner wall of the diverging chamber 223, and the vertex of the diverging cone is close to the transition passage 222, that is, the symmetry axis of the diverging cone and the axis of the transition passage 222 are on the same straight line. The flow dividing passage 224 communicates the flow dividing chamber 223 with the measurement pipe of the mass flow meter body 3.
By adopting the structure, the fluid gathers along the axis through the diversion trench and is shunted by the shunt cone 226, so that the shunt is more uniform, and the measurement precision of the mass flowmeter is improved.
The working principle of the embodiment of the utility model is as follows:
the fluid enters from the rotational flow component 1 firstly and flows along the blades 122 on the flow guide part 12 to generate rotational flow, so that the fluid is uniformly mixed; the rectifying plate 13 can eliminate disturbance generated by fluid rotational flow; then, the fluid enters the straight section 211 in the liquid inlet section 21 of the flow dividing assembly 2, so that the vibration or impact effect of the fluid on the pipe fitting is relieved and prevented, and the influence on the measurement accuracy of the mass flow meter main body 3 is avoided; the bend section 212 turns the fluid from horizontal flow to vertical flow into the flow splitting section 22; after the fluid is converged along the axis by the diversion of the diversion trench, the fluid is shunted by the shunting cone 226.
As can be seen from the above description, the embodiments of the present invention have the following beneficial effects:
the rotational flow component is arranged, so that the fluid is subjected to rotational flow, and the fluid is uniformly mixed; furthermore, the flow dividing assembly is provided with a bending section, the flowing direction of the fluid is converted from horizontal to vertical, and the influence of the gravity of the fluid on the flow dividing can be avoided; furthermore, after being guided by the guide groove, the fluid gathers along the axis and is divided by a splitter cone with a cone end positioned on the axis; meanwhile, the shunting cavity is designed into a streamline shape, so that the fluid can be prevented from generating vortex, and uniform shunting is facilitated; the cooperation of the four components can lead the fluid to be evenly divided, thus being beneficial to improving the measurement precision of the mass flowmeter; finally, a rectifying plate is arranged at the outlet of the rotational flow component, so that disturbance generated by rotational flow can be eliminated; meanwhile, a plurality of annular bulges are arranged on the outer peripheral wall or the inner peripheral wall of the straight line section of the liquid inlet section side by side, so that the vibration or impact effect of the fluid can be relieved and prevented; the two are matched, so that the influence of the external force of the measuring pipe of the mass flow meter can be avoided, and the measurement precision can be improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A coriolis mass flowmeter having high measurement accuracy, comprising:
the rotational flow component enables the fluid to be uniformly mixed;
the flow dividing assembly is communicated with the rotational flow assembly to divide the fluid;
the mass flow meter main body is communicated with the flow dividing assembly;
the flow dividing assembly comprises a liquid inlet section and a flow dividing section which are communicated with each other;
the liquid inlet section is communicated with the rotational flow component;
the reposition of redundant personnel section with the feed liquor section intercommunication has:
the main channel is communicated with the liquid inlet section;
the transition channel is linear and is communicated with the main channel;
the flow guide ring is arranged at the connecting position of the main channel and the transition channel; a through guide groove is formed in the center of the guide ring; the longitudinal section of the diversion trench is conical; the small opening end of the diversion trench is communicated with the transition channel;
the flow dividing cavity is communicated with the transition channel; the axis of the diversion cavity and the axis of the transition channel are on the same straight line;
the shunting cone is of an axisymmetric structure and is arranged in the middle of the inner wall of the shunting cavity; the symmetrical axis of the splitter cone and the axis of the transition channel are on the same straight line;
the reposition of redundant personnel passageway, it is a plurality of, follow the bottom circumference equipartition setting of reposition of redundant personnel awl, one end with reposition of redundant personnel chamber intercommunication, the other end with the survey buret intercommunication of mass flow meter main part.
2. The coriolis mass flowmeter of claim 1 having high measurement accuracy, wherein said vortex assembly comprises:
a pipeline is arranged in the pipeline, and the pipeline is arranged in the pipeline,
a flow guide disposed in the pipe to swirl a fluid, having:
a mounting rod located within the duct;
the blades are spiral and are arranged on the mounting rod; and the two ends of the blade are fixedly connected with the inner wall of the pipeline.
3. The coriolis mass flow meter of claim 2 having a high measurement accuracy wherein said swirl assembly further comprises a fairing plate disposed at an exit of said conduit.
4. The coriolis mass flow meter of claim 2 or claim 3 having a high measurement accuracy wherein the forward end of said mounting bar is tapered.
5. The coriolis mass flowmeter of claim 1 having a high measurement accuracy, wherein said inlet section comprises:
a linear section and a curved section communicating with each other;
the straight section is communicated with the cyclone assembly;
the curved section and the straight section are in smooth transition; the curved section is in communication with the main channel.
6. The coriolis mass flowmeter of claim 5, characterized in that said straight section has a plurality of annular projections on its outer peripheral wall.
7. The coriolis mass flowmeter of claim 5 having a high measurement accuracy wherein said linear section has a plurality of annular projections on its inner peripheral wall.
8. The coriolis mass flow meter of claim 1 having a high measurement accuracy wherein the interior walls of said flow splitting chamber are streamlined.
9. The coriolis mass flowmeter of claim 1 having a high measurement accuracy wherein said transition channel has a diameter less than a diameter of said primary channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220596098.1U CN216954664U (en) | 2022-03-18 | 2022-03-18 | Coriolis mass flowmeter with high measurement accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220596098.1U CN216954664U (en) | 2022-03-18 | 2022-03-18 | Coriolis mass flowmeter with high measurement accuracy |
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| CN216954664U true CN216954664U (en) | 2022-07-12 |
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| CN202220596098.1U Active CN216954664U (en) | 2022-03-18 | 2022-03-18 | Coriolis mass flowmeter with high measurement accuracy |
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