CN221882658U - Vortex street flowmeter - Google Patents

Abstract

The utility model relates to the technical field of flow measuring instruments, in particular to a vortex street flowmeter, which comprises a vortex generating pipe, a vortex street generator and a flow sensor which are respectively arranged on the vortex generating pipe, and first flanges which are respectively arranged at two ends of the vortex generating pipe, wherein buffer grooves and sealing grooves are respectively formed in the inner walls of two sides of the vortex generating pipe, the outer sides of the sealing grooves are communicated with the inner sides of the buffer grooves, the diameter of the sealing grooves is not larger than that of the buffer grooves, one end of each buffer groove is positioned in the same plane with the end part of the vortex generating pipe, a first sealing ring is sleeved in one end of each sealing groove far away from the buffer groove, a buffer ring is sleeved in each buffer groove, one end of each buffer ring penetrates out of each buffer groove, a buffer ring and each buffer ring are in an integrated structure, and one side of each buffer ring is contacted with the first flanges. The vortex shedding flowmeter provided by the utility model has excellent sealing performance, strong damping protection capability and fluid flow measurement standard trust.

Description

A vortex flowmeter

Technical Field

The utility model relates to the technical field of flow measurement instruments, in particular to a vortex flowmeter.

Background Art

A flow meter is an instrument used to measure the measured flow rate of a fluid and/or the flow rate within a selected time interval. In other words, the flow meter is used to measure the flow rate of a fluid in a pipeline or open channel. A vortex flowmeter is a velocity flowmeter developed based on the Karman vortex principle and is used to measure the volume flow rate, standard volume flow rate or mass flow rate of gas, steam or liquid. This flowmeter is mainly used for flow measurement of industrial pipeline medium fluids, including gas, liquid, steam and other media. It is characterized by small pressure loss, large range and high accuracy. When measuring the working volume flow rate, it is almost unaffected by parameters such as fluid density, pressure, temperature and viscosity. Since it has no moving mechanical parts, it has high reliability, low maintenance and long-term stability of instrument parameters. The vortex flowmeter uses a piezoelectric stress sensor with high reliability and can operate in an operating temperature range of -20℃ to +250℃. Because of its simple structure, no moving parts, small pressure loss and wide range ratio, it is widely used in the field of flow measurement of media such as liquids, gases and steam.

The vortex flowmeter is equipped with a vortex type generator, a frequency identification sensor and a signal conversion device. In the working principle of the vortex flowmeter, the flowing medium gradually moves in a direction perpendicular to the generator. After the vortex generator blocks the flow, the flow will appear vortex flow within a specific range. During this period, the media on both sides of the vortex generator are alternately separated and release two series of frequencies. These frequencies are proportional to the average flow velocity, regularity and asymmetry in the pipeline, while the side vortices show opposite rotation directions. With the help of frequency identification sensors and signal conversion devices, field measurements are achieved to obtain the frequency of the vortex, thereby calculating the corresponding fluid flow.

During the use of the vortex flowmeter, the medium conveying pipeline is prone to vibration due to mechanical vibration in the pipeline or vibration of the surrounding environment. As a result, the vortex flowmeter is easily disturbed by external vibration during use, which affects the accuracy of the measurement results. In order to reduce the vibration of the pipeline conveying the medium, it is usually chosen to install a fixture on the pipeline to achieve shock absorption by fixing. However, for pipelines with complex arrangements and pipelines at higher positions, it becomes very difficult to install fixtures, and vibrations can still be transmitted to the vortex flowmeter through rigid connections, which will still have a greater impact on the measurement results of the vortex flowmeter. In addition, the gap between the vortex flowmeter and the pipeline will cause pressure fluctuations in the medium fluid, which may cause turbulence in the medium flow, which is detrimental to the detection effect of the vortex flowmeter.

Summary of the invention

In view of the deficiencies in the prior art, the utility model provides a vortex flowmeter with excellent sealing performance, strong shock absorption and protection capability, and accurate fluid flow measurement, so as to overcome the defects in the prior art.

The technical scheme adopted by the utility model is: a vortex flowmeter, comprising a vortex generating tube, a vortex generator embedded in the vortex generating tube, a flow sensor arranged on the vortex generating tube and first flanges respectively installed at both ends of the vortex generating tube, a buffer groove and a sealing groove are respectively opened on the inner walls of both sides of the vortex generating tube, the outer side of the sealing groove is connected with the inner side of the buffer groove, the diameter of the sealing groove is not greater than the diameter of the buffer groove, one end of the buffer groove and the end of the vortex generating tube are located in the same plane, a first sealing ring is sleeved in the end of the sealing groove away from the buffer groove, a buffer ring is sleeved in the buffer groove, one end of the buffer ring passes through the buffer groove, a buffer ring is sleeved on the passing end of the buffer ring, the buffer ring and the buffer ring are an integrated structure, one side of the buffer ring is in contact with the first flange, a measuring hole is opened on one side of the vortex generating tube, a second sealing ring is interference-fitted on the flow sensor, the flow sensor is sleeved on the measuring hole through the second sealing ring, and the vortex generator is located between the middle part of the vortex generating tube and the flow sensor.

Preferably, a shell is installed on the outer wall of the vortex generating tube, the shell and the vortex generating tube are an integrated structure, a shell cover is arranged on the top of the shell, the shell cover is fixed to the shell by screws, a fixed tube is mounted on the shell cover, the bottom of the fixed tube is fixed to the shell cover, a flow meter is arranged on the top of the fixed tube, the flow meter and the fixed tube are threadedly connected, and the top of the flow sensor is arranged in the fixed tube.

Preferably, a fixing plate is provided at the bottom of the fixing tube, the fixing plate is fixed in the fixing tube, a threaded hole is provided in the middle and lower part of the fixing plate, the top of the flow sensor is threadedly inserted in the threaded hole, a first set of holes is provided in the middle and upper part of the fixing plate, and the first set of holes is connected to the threaded hole.

Preferably, a first packing sheet and a second packing sheet are sequentially arranged between the fixed plate and the second sealing ring in a direction away from the second sealing ring, a second set of holes are respectively opened on the first packing sheet and the second packing sheet, a packing groove is respectively opened on the top surface of the first packing sheet and the bottom surface of the second packing sheet, the packing groove is connected with the second set of holes, and a sealing packing ring is respectively installed in the packing groove, the diameter of the sealing packing ring is not less than the diameter of the second set of holes, and the first packing sheet, the sealing packing ring and the second packing sheet are pressed and fixed in the shell through the fixed plate.

Preferably, a reinforcement shell is arranged above the shell cover, the bottom end of the reinforcement shell is fixed on the shell cover, and the reinforcement shell is fixedly sleeved on the fixing tube.

Preferably, a plurality of third sets of holes are respectively formed on the first flange and the buffer ring, and the plurality of third sets of holes are evenly distributed on the first flange or the buffer ring.

A third sealing ring is arranged at one end of the buffer ring away from the buffer ring. The third sealing ring is sleeved in the buffer groove. Two ends of the third sealing ring are respectively in contact with the groove wall of the buffer groove and one end of the buffer ring.

The beneficial effects of the utility model are as follows: firstly, the utility model provides a sealing groove on the vortex generating tube, and arranges a first sealing ring in the sealing groove, and inserts one side of the pipeline for conveying the medium into the sealing groove so that the end of the pipeline for conveying the medium contacts the first sealing ring, thereby avoiding the end of the pipeline for conveying the medium from contacting the vortex generating tube, and seals the connection between the pipeline and the vortex generating tube, thereby avoiding leakage in the gap between the pipeline and the vortex generating tube; and through the buffer groove provided on the vortex generating tube, and the buffer ring and buffer ring provided on the vortex generating tube, the pipeline for conveying the medium is interference fit in the buffer ring, and the pipeline for conveying the medium is The installed flange is in contact with the buffer ring to prevent the outer wall of the pipeline conveying the medium from contacting the inner cavity of the vortex generating tube, and to prevent the first flange from contacting the flange installed on the pipeline conveying the medium, so as to isolate the transmission of vibration, thereby improving the accuracy of the fluid flow measurement results; the measuring hole and the vortex generator are arranged on one side of the vortex generating tube, so that the vortex generator and the flow sensor are eccentrically arranged on the vortex generating tube, that is, the straight pipe section of the vortex generating tube between the end of the vortex generating tube away from the vortex generator and the vortex generator is used to reduce the turbulence of the medium caused by the gap between the pipeline conveying the medium and the vortex generating tube, thereby further improving the measurement accuracy.

Secondly, the utility model can install the fixed tube and the flow meter on the vortex generating tube through the shell cover, which is convenient for using the flow meter to measure the fluid flow rate, and by providing a fixing plate at the bottom of the fixed tube, the top thread of the flow sensor is sleeved in the threaded hole to facilitate the loading and unloading of the flow sensor; and the first filler plate, the sealing filler ring and the second filler plate are pressed and fixed in the shell through the fixing plate, so that the flow sensor is sealed in the shell; in addition, by providing a reinforcement shell above the shell cover, the connection between the fixed tube and the shell cover is reinforced to ensure stable and reliable use of the utility model.

Thirdly, the utility model respectively opens a plurality of third sets of holes on the first flange and the buffer ring, and uses bolts to pass through the third sets of holes, and then puts the flange installed on the pipeline for conveying the medium on the bolts, and then tightens the nuts on the bolts, so as to facilitate the clamping and fixing of the flange, the buffer ring and the first flange installed on the pipeline for conveying the medium; and the third sealing ring is arranged in the buffer groove, and the third sealing ring is interference fit on the pipeline for conveying the medium to improve the effect of isolating vibration, thereby improving the stability of medium conveying, and performing secondary sealing on the pipeline for conveying the medium, so as to further improve the sealing effect of the connection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective schematic diagram of the utility model.

FIG. 2 is an assembly diagram of the utility model and a medium conveying pipeline.

FIG. 3 is an enlarged schematic diagram of point A in FIG. 2 .

FIG. 4 is an enlarged schematic diagram of point B in FIG. 2 .

FIG. 5 is an exploded view of the assembly of the utility model and the medium conveying pipeline.

FIG. 6 is an enlarged schematic diagram of point C in FIG. 5 .

DETAILED DESCRIPTION

As shown in Figures 1 to 6, a vortex flowmeter includes a vortex generating tube 1, a vortex generator 2 embedded in the vortex generating tube 1, a flow sensor 3 arranged on the vortex generating tube 1, and first flanges 4 respectively installed at both ends of the vortex generating tube 1. The inner walls of both sides of the vortex generating tube 1 are respectively provided with a buffer groove 5 and a sealing groove 6. The outer side of the sealing groove 6 is connected to the inner side of the buffer groove 5. The diameter of the sealing groove 6 is not greater than the diameter of the buffer groove 5. One end of the buffer groove 5 is located in the same plane as the end of the vortex generating tube 1. The end of the sealing groove 6 away from the buffer groove 5 is provided with a first sealing ring 7. The conveying medium One side of the pipeline is inserted into the sealing groove 6, so that the end of the pipeline conveying the medium contacts the first sealing ring 7, thereby avoiding the end of the pipeline from contacting the vortex generating tube 1, and at the same time sealing the connection between the pipeline and the vortex generating tube 1; a buffer ring 8 is sleeved in the buffer groove 5, one end of the buffer ring 8 passes through the buffer groove 5, and a buffer ring 9 is sleeved on the passing end of the buffer ring 8, and the buffer ring 9 and the buffer ring 8 are an integral structure, one side of the buffer ring 9 contacts the first flange 4, and the pipeline conveying the medium is interference-fitted in the buffer ring 8, and the flange installed on the pipeline conveying the medium contacts the other side of the buffer ring 9, avoiding The outer wall of the pipeline for conveying the medium is prevented from contacting with the inner cavity of the vortex generating tube, and the first flange is prevented from contacting with the flange installed on the pipeline for conveying the medium, so as to cut off the transmission of vibration, thereby improving the accuracy of the fluid flow measurement result; a measuring hole 10 is opened on one side of the vortex generating tube 1, and a second sealing ring 11 is interference fit on the flow sensor 3, and the flow sensor 3 is sleeved in the measuring hole 10 through the second sealing ring 11. Specifically, the measuring hole 10 is a stepped hole, and the top aperture of the measuring hole 10 is not less than the bottom aperture of the measuring hole 10, and the second sealing ring 11 is located at the top of the measuring hole 10. The bottom of the second sealing ring 11 contacts the stepped hole wall formed at the bottom of the measuring hole 10. The vortex generator 2 is located between the middle of the vortex generating tube 1 and the flow sensor 3. The measuring hole 10 and the vortex generator 2 are arranged on one side of the vortex generating tube 1, so that the vortex generator 2 and the flow sensor 3 are eccentrically arranged on the vortex generating tube 1. By utilizing the straight tube section of the vortex generating tube 1 from the end of the vortex generating tube 1 away from the vortex generator 2 to the vortex generator 2, the turbulence of the medium caused by the gap between the pipeline conveying the medium and the vortex generating tube 1 is reduced, thereby further improving the accuracy of the measurement.

In this embodiment, a shell 12 is installed on the outer wall of the vortex generating tube 1, and the shell 12 and the vortex generating tube 1 are an integral structure. A shell cover 13 is arranged above the shell 12, and the shell cover 13 is fixed to the shell 12 by screws. Further, a sealing gasket is arranged between the shell cover 13 and the shell 12 to seal the gap between the shell cover 13 and the shell 12. A fixed tube 14 is mounted on the shell cover 13, and the bottom of the fixed tube 14 is fixed on the shell cover 13. A flow meter 15 is arranged on the top of the fixed tube 14, and the flow meter 15 and the fixed tube 14 are threadedly connected. The top of the flow sensor 3 is arranged in the fixed tube 14. Further, the flow meter 15 includes a signal conversion element that converts the detection signal of the flow sensor 3 into an electrical signal, a chip for calculating the fluid flow rate, and a display screen for displaying the fluid flow rate. A wire connecting the flow sensor 3 and the flow meter 15 is arranged in the fixed tube 14, so that the flow sensor 3 can feed back the detection signal to the flow meter 15.

Specifically, a fixing plate 16 is provided at the bottom of the fixing tube 14, and the fixing plate 16 is fixed in the fixing tube 14. A threaded hole 17 is provided in the middle and lower part of the fixing plate 16. The top thread of the flow sensor 3 is sleeved in the threaded hole 17. A first set of holes 18 is provided in the middle and upper part of the fixing plate 16. The first set of holes 18 is connected to the threaded hole 17. The diameter of the first set of holes 18 is not larger than the diameter of the threaded hole 17, so as to facilitate the loading and unloading of the flow sensor 3. The wire connecting the flow sensor 3 and the flow meter 15 is installed through the first set 18 to meet the flow sensor 3 Feedback detection signal to the flow meter.

Please refer to Figures 3 and 6 again. The first packing sheet 16 and the second packing sheet 20 are sequentially arranged between the fixing plate 16 and the second sealing ring 11 in the direction away from the second sealing ring 11. The first packing sheet 19 and the second packing sheet 20 are respectively provided with second sets of holes 21. The top surface of the first packing sheet 19 and the bottom surface of the second packing sheet 20 are respectively provided with packing grooves 22. The packing grooves 22 are connected with the second sets of holes 21. Sealing packing rings 23 are respectively installed in the packing grooves 22. The diameter of the sealing packing ring 23 is not less than the diameter of the second sets of holes 21. The first packing sheet 19, the sealing packing ring 23 and the second packing sheet 20 are pressed and fixed in the housing 12 through the fixing plate 16. By causing the sealing packing ring 23 to deform, the flow sensor 3 is sealed in the housing 12.

Specifically, a reinforcement shell 24 is disposed above the shell cover 13 , the bottom end of the reinforcement shell 24 is fixed on the shell cover 13 , and the reinforcement shell 24 is fixedly sleeved on the fixing tube 14 , thereby reinforcing the connection between the fixing tube 14 and the shell cover 13 .

In this embodiment, a plurality of third sets of holes 25 are respectively provided on the first flange 4 and the buffer ring 9. The third sets of holes 25 are evenly distributed on the first flange 4 or the buffer ring 9. Bolts are passed through the third sets of holes 25 and nuts are screwed on the bolts, thereby facilitating the clamping and fixing of the flange, buffer ring 9 and first flange 4 installed on the pipeline conveying the medium.

Please refer to Figures 4 and 5 again. A third sealing ring 26 is provided at one end of the buffer ring 8 away from the buffer ring 9. The third sealing ring 26 is sleeved in the buffer groove 5. Both ends of the third sealing ring 26 are respectively in contact with the groove wall of the buffer groove 5 and one end of the buffer ring 8. The third sealing ring 26 is interference fit on the pipeline for conveying the medium, thereby improving the effect of isolating vibration, thereby improving the stability of medium conveying, and performing secondary sealing on the pipeline for conveying the medium, thereby further improving the sealing effect of the connection.

The installation method of this product is as follows: as shown in Figures 1 to 6, first, install the vortex generator 2, the flow sensor 3 and the flow meter 15 on the fixed tube 14 respectively; specifically, tighten the top of the flow sensor 3 to install it in the threaded hole 17, so that the wire installed on the flow sensor 3 passes through the first set of holes 8 into the fixed tube 14, and the wire installed on the flow sensor 3 is installed on the flow meter 15, and then the flow meter 15 is installed on the fixed tube 14, thereby completing the installation of the flow sensor 3 and the flow meter 15.

Then, install the fixed tube 14 on the vortex generating tube 1; specifically, place the fixed tube 14 on its side, and sequentially mount the second stuffing sheet 20, the sealing stuffing ring 23 and the first stuffing sheet 19 on the flow sensor 3, so that the second stuffing sheet 20 contacts the fixed plate 16, take out the second sealing ring 11, and mount the second sealing ring 11 on the flow sensor 3; then insert the flow sensor 3 into the measuring hole 10, so that the second sealing ring 11 squeezes the top of the measuring hole 10, and the first stuffing sheet 19, the sealing stuffing ring 23 and the second stuffing sheet 20 are pressed into the shell 12 through the fixed plate 16, and the shell cover 13 is fixed to the shell 12 with screws.

Finally, install this product on the pipeline for conveying medium. In order to avoid the pressure fluctuation of the medium fluid affecting the measurement of the medium, the installation position of this product should be selected on a long straight pipe for conveying medium. The length of the straight pipe should not be less than ten times the diameter of the vortex generating tube 1, and the installation position should be on a horizontal pipe; specifically, place the first sealing ring 7 in the sealing groove 6, and sequentially put the buffer ring 8 and the third sealing ring 26 on the straight pipe along the end of the straight pipe for conveying medium; slowly insert the vortex generating tube 1 into the straight pipe for conveying medium, so that the two sides of the buffer ring 9 are respectively in contact with the first flange 4 and the flange installed on the straight pipe for conveying medium, and the bolts are passed through the third set of holes 25 and the flange installed on the straight pipe for conveying medium, and the nuts are tightened on the bolts, so as to reinforce the flange, buffer ring 9 and first flange 4 installed on the straight pipe for conveying medium.

It should be noted that in order to ensure that the first sealing ring 7 is squeezed by the straight pipe of the conveying medium and the vortex generating tube 1, before installation, the installation position of this product should be selected according to the groove depth of the buffer groove 5, the groove depth of the sealing groove 6, the width of the first sealing ring 7 and the position of the flange on the straight pipe of the conveying medium, and the pipe should be cut with a cutting tool to create an installation position for this product.

The utility model provides a vortex flowmeter with excellent sealing performance, strong shock absorption and protection capability, and accurate fluid flow measurement, thereby enabling the utility model to have broad market prospects.

The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims (7)

1. A vortex flowmeter, comprising a vortex generating tube (1), a vortex generator (2) embedded in the vortex generating tube (1), a flow sensor (3) arranged on the vortex generating tube (1), and first flanges (4) respectively installed at both ends of the vortex generating tube (1), characterized in that: a buffer groove (5) and a sealing groove (6) are respectively opened on the inner wall of both sides of the vortex generating tube (1), the outer side of the sealing groove (6) is connected to the inner side of the buffer groove (5), the diameter of the sealing groove (6) is not greater than the diameter of the buffer groove (5), one end of the buffer groove (5) and the end of the vortex generating tube (1) are located in the same plane, and the end of the sealing groove (6) away from the buffer groove (5) is located in the same plane. A first sealing ring (7) is mounted on the buffer groove (5), a buffer ring (8) is mounted in the buffer groove (5), one end of the buffer ring (8) protrudes from the buffer groove (5), a buffer ring (9) is mounted on the protruding end of the buffer ring (8), the buffer ring (9) and the buffer ring (8) are an integral structure, one side of the buffer ring (9) is in contact with the first flange (4), a measuring hole (10) is provided on one side of the vortex generating tube (1), a second sealing ring (11) is interference-mounted on the flow sensor (3), the flow sensor (3) is mounted on the measuring hole (10) through the second sealing ring (11), and the vortex generator (2) is located between the middle of the vortex generating tube (1) and the flow sensor (3). 2. The vortex flowmeter according to claim 1 is characterized in that: a shell (12) is installed on the outer wall of the vortex generating tube (1), the shell (12) and the vortex generating tube (1) are an integral structure, a shell cover (13) is arranged above the shell (12), the shell cover (13) is fixed to the shell (12) by screws, a fixed tube (14) is sleeved on the shell cover (13), the bottom of the fixed tube (14) is fixed to the shell cover (13), a flow meter (15) is arranged on the top of the fixed tube (14), the flow meter (15) and the fixed tube (14) are threadedly connected, and the top of the flow sensor (3) is arranged in the fixed tube (14). 3. The vortex flowmeter according to claim 2 is characterized in that: a fixing plate (16) is provided at the bottom of the fixing tube (14), the fixing plate (16) is fixed in the fixing tube (14), a threaded hole (17) is provided in the middle and lower part of the fixing plate (16), the top of the flow sensor (3) is respectively threadedly sleeved in the threaded hole (17), a first set of holes (18) is provided in the middle and upper part of the fixing plate (16), and the first set of holes (18) is connected to the threaded hole (17). 4. The vortex flowmeter according to claim 3 is characterized in that: a first packing sheet (19) and a second packing sheet (20) are sequentially arranged between the fixing plate (16) and the second sealing ring (11) in a direction away from the second sealing ring (11), a second set of holes (21) are respectively opened on the first packing sheet (19) and the second packing sheet (20), a packing groove (22) is respectively opened on the top surface of the first packing sheet (19) and the bottom surface of the second packing sheet (20), the packing groove (22) is connected with the second set of holes (21), a sealing packing ring (23) is respectively installed in the packing groove (22), the diameter of the sealing packing ring (23) is not less than the diameter of the second set of holes (21), and the first packing sheet (19), the sealing packing ring (23) and the second packing sheet (20) are pressed and fixed in the housing (12) through the fixing plate (16). 5. The vortex flowmeter according to claim 2, characterized in that a reinforcement shell (24) is arranged above the shell cover (13), the bottom end of the reinforcement shell (24) is fixed on the shell cover (13), and the reinforcement shell (24) is fixedly sleeved on the fixed pipe (14). 6. The vortex flowmeter according to claim 1, characterized in that: a plurality of third sets of holes (25) are respectively opened on the first flange (4) and the buffer ring (9), and the plurality of third sets of holes (25) are evenly distributed on the first flange (4) or the buffer ring (9). 7. The vortex flowmeter according to claim 1 is characterized in that a third sealing ring (26) is provided at one end of the buffer ring (8) away from the buffer ring (9), the third sealing ring (26) is sleeved in the buffer groove (5), and two ends of the third sealing ring (26) are respectively in contact with the groove wall of the buffer groove (5) and one end of the buffer ring (8).