CN220120152U - Multichannel high-precision vortex shedding flowmeter - Google Patents
Multichannel high-precision vortex shedding flowmeter Download PDFInfo
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- CN220120152U CN220120152U CN202320024722.5U CN202320024722U CN220120152U CN 220120152 U CN220120152 U CN 220120152U CN 202320024722 U CN202320024722 U CN 202320024722U CN 220120152 U CN220120152 U CN 220120152U
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Abstract
The utility model discloses a multichannel high-precision vortex shedding flowmeter, and relates to the technical field of flowmeters. Including survey pipe, vortex generating body, piezoelectric sensor, spliced pole and flow integrating instrument, survey pipe center installs the vortex generating body, and survey pipe surface is opened there are three through-holes, and three piezoelectric sensor stretches into survey intraductally through three through-hole on the survey pipe, and piezoelectric sensor installs the rear side at the vortex generating body, is fixed with the spliced pole in the survey pipe outside, and three piezoelectric sensor is wrapped to the spliced pole, and flow integrating instrument installs the top at the spliced pole, is connected with three piezoelectric sensor. The vortex shedding flowmeter is simple in structure and convenient to install, and can effectively improve the metering accuracy of the vortex shedding flowmeter.
Description
Technical Field
The utility model relates to the technical field of flowmeters, in particular to a multichannel high-precision vortex shedding flowmeter.
Background
A meter for measuring the flow of a fluid in a pipe or open channel. Flow meters are one of the components of metering science and technology. The method is widely applied to various fields of industrial and agricultural production, national defense construction, scientific research, external trade and people's life. In the petroleum industry production, from petroleum exploitation, transportation, smelting and processing to trade sales, the flow measurement runs through the whole process, and any link is not separated from the flow measurement, otherwise, normal production and trade interaction of the petroleum industry cannot be guaranteed. In the chemical industry, inaccurate flow metering can cause imbalance of chemical component distribution ratio, product quality can not be guaranteed, and serious production safety accidents can also occur. In the industrial production of electric power, measurement and regulation of medium flow rates of liquids, gases, vapors and the like are important. The accuracy of flow measurement not only has great economic significance for ensuring the power plant to operate under the optimal parameters, but also becomes an important link for ensuring the safe operation of the power plant along with the development of high-temperature high-pressure large-capacity units. Such as interruption or reduction of the instantaneous feed water flow to a large capacity boiler, can cause serious dry or pipe explosion accidents. This requires that the flow measuring device not only meter accurately, but also send an alarm signal in time. In the steel industry, the flow measurement of circulating water and oxygen (or air) during steelmaking is one of the important parameters to ensure product quality. In the industries of light industry, food, textile and the like, the flow metering is not separated.
The vortex street flowmeter is a new type flowmeter developed based on karman vortex street principle. Each vortex shedding flowmeter has a triangular column installed in the center of the pipeline, the triangular column is an obstacle for the flow field, and a piezoelectric sensor for recording the slightest pressure difference generated by flowing fluid is arranged at the downstream of the triangular column. If the fluid does not flow, it will not generate eddies, which will gradually form eddies downstream of the triangular posts once the fluid starts to flow and reaches a certain flow rate, these eddies are alternately separated on both sides of the triangular posts and carried away by the fluid, at which time high and low pressure areas are formed downstream of the triangular posts, so that a phenomenon called "karman vortex street" occurs. These pressure differences are exactly matched to the frequency of the passing vortices and are accurately measured by a piezoelectric sensor, the distance between two successive vortices corresponding to a specific volume of fluid. Thus, counting the eddies that pass can calculate the total flow.
The velocity distribution rule of the fluid on the section of the pipe is complex, and experiments show that the velocity of the fluid flowing through each point on any section in the pipeline changes along the pipe diameter, namely, the velocity of the fluid is maximum at the center of the section of the pipe, the velocity of the fluid is smaller when the velocity of the fluid is closer to the pipe wall, and the velocity of the fluid is zero at the pipe wall.
The prior vortex shedding flowmeter has only one triangular column installed in the center of the pipeline, once fluid starts to flow and reaches a certain flow velocity, vortex is gradually formed at the downstream of the triangular column, a phenomenon called Karman vortex street appears, the distance between two continuous vortices and the specific volume of the fluid are accurately measured through a piezoelectric sensor installed at the rear of the triangular column, and the total flow in the pipeline is obtained through calculation. This presents a problem in that the data measured by the vortex shedding flowmeter is the flow rate at the center of the pipe section, i.e. the flow rate at which the entire pipe section is the fastest, and there is an error in the measured flow rate and the flow rate in the actual pipe.
In view of the shortcomings of the prior art, the utility model designs a multichannel high-precision vortex shedding flowmeter for solving the problem that the vortex shedding flowmeter in the prior art is not accurate enough in metering.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide the multichannel high-precision vortex shedding flowmeter which is simple in structure and convenient to install, and can effectively improve the metering precision of the vortex shedding flowmeter.
In order to achieve the above object, the present utility model is realized by the following technical scheme: the utility model provides a multichannel high accuracy vortex shedding flowmeter, including survey pipe, vortex generator, piezoelectric sensor, spliced pole and flow totalizer, survey pipe center installs the vortex generator, survey pipe surface is opened there are three through-hole, three piezoelectric sensor stretches into survey intraductally through three through-hole on the survey pipe, piezoelectric sensor installs the rear side at the vortex generator, is fixed with the spliced pole in the survey pipe outside, the spliced pole wraps three piezoelectric sensor, the top at the spliced pole is installed to the flow totalizer, be connected with three piezoelectric sensor.
Preferably, the two ends of the measuring tube adopt flange structures, three through holes are formed in the surface of the measuring tube, the three through holes are uniformly distributed on the tube wall according to an angle of 120 degrees, and three flow sensors, connecting columns and a flow integrating instrument are installed on the measuring tube.
Preferably, the vortex generating body is a column body of a Y-shaped structure, three sides of the Y-shaped structure are triangular columns with the same shape, the three sides of the Y-shaped structure are connected into a whole in a welding mode, and the three sides of the Y-shaped structure are uniformly distributed at an angle of 120 degrees and are arranged in the middle of the measuring tube.
Preferably, the three piezoelectric sensors are the same in model number and are respectively arranged on the rear sides of the three Y-shaped sides of the vortex generating body, and the sensor probe extends to be abutted against the rear sides of the vortex generating body.
The working principle of the utility model is as follows: the three sides of the vortex generating body are triangular columns with the same shape and are arranged in the middle of the measuring tube, when fluid in the measuring tube flows through the vortex generating body, the vortex generating body can divide the fluid section into three independent channels, and when the fluid reaches a certain flow velocity, three independent vortices can be gradually formed at the downstream of the three channels.
The vortex generating body divides the section in the pipeline into three independent channels, so that the influence of the pipe wall on the flow velocity can be effectively reduced.
The distance between two continuous vortexes and the specific volume of fluid are accurately measured by piezoelectric sensors arranged behind the three sides, the data acquired by the three piezoelectric sensors are calculated, and the total flow in the pipeline can be accurately calculated by calculation.
The utility model has the beneficial effects that:
the triangular columns with special shapes divide medium fluid in the pipeline into three channels, and the piezoelectric sensor is arranged behind each channel, so that the influence of the pipe wall on the flow velocity can be effectively reduced, the measurement accuracy of the flowmeter is improved, and the flow meter has the functions of simple structure, convenience in installation and the like.
Drawings
The utility model is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic view of a vortex generating body of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic side view of the present utility model;
fig. 4 is a side partial schematic view of a measuring tube of the present utility model.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
Referring to fig. 1-4, the present embodiment adopts the following technical scheme: the utility model provides a multichannel high accuracy vortex shedding flowmeter, including measuring pipe 1, vortex takes place body 2, piezoelectric sensor 3, spliced pole 4 and flow totalizer 5, measuring pipe 1 installs vortex taking place body 2 in the center, it has three through-hole to open on measuring pipe 1 surface, three piezoelectric sensor 3 stretches into measuring pipe 1 through three through-hole on measuring pipe 1, piezoelectric sensor 3 installs the rear side at vortex taking place body 2, be fixed with spliced pole 4 in measuring pipe 1 outside, spliced pole 4 wraps three piezoelectric sensor 3, flow totalizer 5 is installed on the top of spliced pole 4, be connected with three piezoelectric sensor 3.
When the flow medium flows through the vortex generating body 2, the vortex generating body 2 divides the fluid section into three independent channels, when the fluid reaches a certain flow velocity, three independent vortices are gradually formed at the downstream of the three channels, the piezoelectric sensor 3 arranged at the rear side of the vortex generating body 2 senses the pulsating force of vortex street vortex fluid, and the pulsating force is converted into an alternating charge signal through the piezoelectric element packaged in the sensor and is transmitted to the flow integrating instrument 5.
The three piezoelectric sensors 3 are connected with a flow integrating instrument 5, collected data are transmitted to the flow integrating instrument 5, and the flow integrating instrument 5 calculates the flow of the current pipeline through a built-in algorithm.
The three piezoelectric sensors 3 are wrapped by the connecting column 4, and a flow integrating instrument 5 is arranged at the top end of the connecting column 4.
According to the special embodiment, the medium fluid in the pipeline is divided into three channels through the triangular columns with special shapes, the piezoelectric sensor is arranged behind each channel, the influence of the pipe wall on the flow velocity can be effectively reduced, the measuring precision of the flowmeter is improved, and the special triangular column type flow meter has the functions of being simple in structure, convenient to install and the like.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a multichannel high accuracy vortex flowmeter, a serial communication port, including measuring tube (1), vortex body (2) take place, piezoelectric sensor (3), spliced pole (4) and flow totalizer (5), measuring tube (1) center mount has vortex body (2) take place, three through-hole is opened on measuring tube (1) surface, three piezoelectric sensor (3) stretch into measuring tube (1) through three through-hole on measuring tube (1), piezoelectric sensor (3) are installed at the rear side of vortex body (2), be fixed with spliced pole (4) in measuring tube (1) outside, spliced pole (4) wrap up three piezoelectric sensor (3), the top at spliced pole (4) is installed to flow totalizer (5), be connected with three piezoelectric sensor (3).
2. The multichannel high-precision vortex shedding flowmeter according to claim 1, wherein the two ends of the measuring tube (1) adopt flange structures, three through holes are formed in the surface of the measuring tube, the three through holes are uniformly distributed on the tube wall according to an angle of 120 degrees, and three flow sensors, connecting columns and a flow integrating instrument are installed on the three through holes.
3. The multi-channel high-precision vortex shedding flowmeter according to claim 1, wherein the vortex generating body (2) is a column body with a Y-shaped structure, three sides of the Y-shaped structure are triangular columns with the same shape, the three sides are connected into a whole in a welding mode, the three sides of the Y-shaped structure are uniformly distributed at an angle of 120 degrees, and the three sides are arranged in the middle of the measuring tube.
4. The multi-channel high-precision vortex shedding flowmeter according to claim 1, wherein the three piezoelectric sensors (3) are the same in type and are respectively arranged on the rear sides of three Y-shaped sides of the vortex generating body, and the sensor probes extend out to be abutted against the rear sides of the vortex generating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024722.5U CN220120152U (en) | 2023-01-05 | 2023-01-05 | Multichannel high-precision vortex shedding flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320024722.5U CN220120152U (en) | 2023-01-05 | 2023-01-05 | Multichannel high-precision vortex shedding flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN220120152U true CN220120152U (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320024722.5U Active CN220120152U (en) | 2023-01-05 | 2023-01-05 | Multichannel high-precision vortex shedding flowmeter |
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| Country | Link |
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| CN (1) | CN220120152U (en) |
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2023
- 2023-01-05 CN CN202320024722.5U patent/CN220120152U/en active Active
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