CN217032610U - Vortex shedding flowmeter with small flow measurement - Google Patents
Vortex shedding flowmeter with small flow measurement Download PDFInfo
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- CN217032610U CN217032610U CN202220745100.7U CN202220745100U CN217032610U CN 217032610 U CN217032610 U CN 217032610U CN 202220745100 U CN202220745100 U CN 202220745100U CN 217032610 U CN217032610 U CN 217032610U
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Abstract
The utility model discloses a vortex shedding flowmeter with small flow measurement, which comprises a flowmeter body and a waist-shaped pipe arranged on the flowmeter body, wherein two ends of the waist-shaped pipe are communicated with a conveying pipeline, a vortex street body fixing hole is formed in the waist-shaped pipe, a vortex generating body is fixed in the vortex street body fixing hole, a flow measuring hole is formed in the wall of the waist-shaped pipe on the back flow side of the vortex generating body, a probe is fixed in the flow measuring hole, the probe is connected with a flow sensor, a pressure detecting hole is formed in the side wall of the waist-shaped pipe, a pressure guide pipe communicated with the waist-shaped pipe is connected to the pressure detecting hole, and a pressure sensor is arranged at the other end of the pressure guide pipe; the vortex shedding flowmeter with small flow measurement reduces the cross section area of the passing fluid, improves the flow velocity of the pipeline fluid and reduces the flow velocity through the structural design of the waist-shaped pipe; the lower measurement limit of the flowmeter improves the measurement precision and is suitable for small-flow measurement.
Description
Technical Field
The utility model relates to flow measurement in the field of industrial metering, in particular to a vortex shedding flowmeter with small flow measurement.
Background
The vortex street flow meter is widely applied to industrial flow measurement by virtue of wide application range and strong stability, but for small-caliber vortex streets, the lower measurement limit is generally higher, and the requirement of small flow measurement cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a vortex shedding flowmeter with small flow measurement, which reduces the cross section area of passing fluid, improves the flow velocity of pipeline fluid and reduces the flow velocity through the structural design of a waist-shaped pipe; the lower measurement limit of the flowmeter improves the measurement precision and is suitable for small-flow measurement.
The utility model provides a vortex shedding flowmeter with small flow measurement, which comprises a flowmeter body and a waist-shaped pipe arranged on the flowmeter body, wherein two ends of the waist-shaped pipe are communicated with a conveying pipeline, a vortex generating body is fixed in the waist-shaped pipe, a flow measuring hole is formed in the wall of the waist-shaped pipe on the back flow side of the vortex generating body, a probe is fixed in the flow measuring hole, the probe is connected with a flow sensor, a pressure detecting hole is formed in the wall of the waist-shaped pipe, the pressure detecting hole is connected with a pressure guide pipe, and the other end of the pressure guide pipe is provided with a pressure sensor.
Preferably, the connecting end of the conduit and the pressure detection hole is lower than the other end, the conduit sequentially comprises a first connecting section, a second vertical section, a third bending section, a fourth vertical section and a fifth connecting section from the connecting end of the conduit and the pressure detection hole to the other end, the length of the fourth vertical section is larger than that of the second vertical section, and the third bending section is in a semi-arc shape.
Preferably, the first connecting section and the fifth connecting section both comprise a horizontal section and an arc section, and the arc section realizes smooth connection between the horizontal section and the vertical section.
Preferably, the pressure detection hole is arranged on the wall of a waist-shaped pipe on the side surface of the vortex generator, and the vortex generator is a triangular prism and is arranged in the middle of the waist-shaped pipe in the length direction.
Preferably, the flowmeter body is connected with a supporting rod, a gauge outfit is installed at the top of the supporting rod, the pressure sensor is fixed on the supporting rod, a signal converter is arranged in the gauge outfit, a display screen is arranged on the gauge outfit, and the signal converter is in signal connection with the flow sensor and the pressure sensor.
Preferably, both ends of the waist-shaped pipe are respectively connected with reducing pipes, and the reducing pipes are connected with the conveying pipeline.
The vortex shedding flowmeter with small flow measurement in the technical scheme of the utility model has the beneficial effects that:
1. through the structural design of the waist-shaped pipe, the cross section area of the passing reduced fluid is reduced, the flow velocity of the pipeline fluid is improved, and the flow velocity is reduced; the lower measurement limit of the flowmeter improves the measurement precision and is suitable for small-flow measurement.
2. The arrangement of the conduit structure equalizes the generated flow pressure, so that the measured pressure is stable.
Drawings
FIG. 1 is a schematic structural diagram of a vortex shedding flowmeter with small flow measurement according to the technical solution of the present invention,
FIG. 2 is a schematic view of the structure along the line A-A in FIG. 1,
fig. 3 is a longitudinal sectional view of fig. 1.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
As shown in fig. 1 to 3, the vortex shedding flowmeter with small flow measurement according to the technical solution of the present invention includes a flowmeter body 1 and a waist pipe 11 disposed on the flowmeter body 1, wherein two ends of the waist pipe 11 are communicated with a conveying pipeline. The vortex generating body 9 is fixed in the waist-shaped pipe 11, and two ends of the vortex generating body 9 are welded and fixed in the waist-shaped pipe. The waist-shaped pipe wall on the back flow surface side of the vortex generating body 9 is provided with a flow measuring hole, and a probe 13 is fixed in the flow measuring hole. The probe 13 is connected with a flow sensor. The waist-shaped pipe wall is provided with a pressure detection hole 20, and the pressure detection hole 20 is connected with a pressure conduit 2. The other end of the pressure conduit 2 is provided with a pressure sensor 8.
Based on above-mentioned technical scheme, through setting up flow sensor, realize detecting the flow of the intraductal fluid of waist shape. Meanwhile, the pressure sensor 8 is arranged to test the pressure in the kidney-shaped pipe, and meanwhile, the pressure compensation can be performed on the flow measured by the flow sensor in combination with the flow measured by the flow sensor, so that the accuracy of flow measurement is improved.
Based on the technical scheme, the cross section area of the passing fluid is reduced by the arrangement of the waist-shaped pipe, the flow velocity of the pipeline fluid is improved, and the flow velocity is reduced; the lower measurement limit of the flowmeter improves the measurement precision and is suitable for small-flow measurement.
In the technical scheme, the connecting end of the conduit 2 and the pressure detection hole is lower than the other end. The conduit 2 comprises a first connecting section 21, a second vertical section 22, a third bending section 23, a fourth vertical section 24 and a fifth connecting section 25 from the end connected with the pressure detection hole to the other end in sequence. The length of the fourth vertical section 24 is greater than that of the second vertical section 22, and the third bending section 23 is in a semi-circular arc shape. By means of the technical scheme, the stabilization of the fluid is effectively realized, the problem of local high pressure is avoided, and the accuracy of pressure detection is ensured. The guide pipe 2 is fixedly arranged, so that the guide pipe is prevented from shaking or swinging during working, the stability of fluid pressure is ensured, and the problem of instantaneous high pressure is avoided.
In this technical scheme, first linkage segment 21 and fifth linkage segment 25 all include horizontal segment and circular arc section, the circular arc section realizes the smooth connection of horizontal segment and vertical section. The whole inner wall of the conduit 2 is ensured to be smooth, so that the fluid entering the conduit flows stably, and local high pressure or instantaneous high pressure cannot occur.
In this technical solution, the pressure detecting hole 20 is disposed on the wall of the waist-shaped pipe on the side of the vortex generating body, and the vortex generating body is a triangular prism and disposed at the middle position of the waist-shaped pipe in the length direction. The triangular prism vortex generating body is adopted, strong vortex can be obtained, and the boundary layer separation point is fixed, so that the flow detection is more accurate.
In the technical scheme, a supporting rod 4 is connected to the flowmeter body 1, and a gauge outfit 5 is installed at the top of the supporting rod 4. The pressure sensor 8 is fixed on the support rod 4. A signal converter 7 is arranged in the gauge head 5. The gauge outfit 5 is provided with a display screen 6, and the signal converter 7 is in signal connection with the flow sensor and the pressure sensor 8. The signal converter converts the signal transmitted by the flow sensor and the pressure sensor 8 into a signal, and finally displays the signal on the display board 6, and meanwhile, a signal transmitter 12 can be arranged in the gauge outfit, and the flow value and the pressure value are transmitted to an upper computer through the signal transmitter 12, so that the upper computer can monitor, manage and dispatch conveniently. The support rod 4 is a hollow rod, and the signal wires 10 of the flow sensor, the pressure sensor 8 and the like pass through the support rod, so that wiring is facilitated, the installation and arrangement of the flowmeter are facilitated, and the service life of the flowmeter is prolonged.
In the technical scheme, two ends of the waist-shaped pipe 11 are respectively connected with reducing pipes 3, and the reducing pipes 3 are connected with a conveying pipeline. Due to the arrangement of the reducing pipes, the flowmeter main body can be conveniently installed and fixed in one year, and a transition area is increased for the fluid to enter and exit the kidney-shaped pipe, so that the problems of high local flow speed, large flow and high pressure of the fluid are avoided, and the flow detection and the pressure detection are more accurate.
Technical solution of the utility model the present invention is described above with reference to the accompanying drawings by way of example, and it is to be understood that the specific implementation of the present invention is not limited to the above-described embodiments, and it is within the scope of the present invention to employ various insubstantial modifications of the method concept and technical solution of the present invention, or to directly apply the concept and technical solution of the present invention to other applications without modification.
Claims (6)
1. The utility model provides a vortex flowmeter of low flow measurement, its characterized in that is in including flowmeter body and setting waist venturi tube on the flowmeter body, waist venturi tube both ends intercommunication pipeline, waist venturi tube internal fixation has vortex generator, is provided with the flow measurement hole on the waist shape pipe wall of vortex generator dorsal current face side, the flow measurement downthehole probe that is fixed with, be connected with flow sensor on the probe, be provided with pressure detection hole on the waist shape pipe wall, be connected with pressure conduit on the pressure detection hole, pressure sensor is installed to the pressure conduit other end.
2. The vortex flowmeter with small flow measurement according to claim 1, wherein the connecting end of the conduit pipe to the pressure detecting hole is lower than the other end, the conduit pipe comprises a first connecting section, a second vertical section, a third bending section, a fourth vertical section and a fifth connecting section in sequence from the connecting end to the other end of the pressure detecting hole, the fourth vertical section has a larger length than the second vertical section, and the third bending section has a semi-circular arc shape.
3. The small flow measurement vortex shedding flowmeter according to claim 2, wherein the first connecting section and the fifth connecting section each comprise a horizontal section and an arc section, and the arc section realizes smooth connection of the horizontal section and the vertical section.
4. The vortex shedding flowmeter according to claim 1, wherein the pressure detecting hole is provided in a wall of a kidney-shaped pipe on a side surface of the vortex generating body, and the vortex generating body is a triangular prism and is provided at a middle position in a longitudinal direction of the kidney-shaped pipe.
5. The vortex shedding flowmeter with small flow measurement according to claim 1, wherein a support rod is connected to the flowmeter body, a meter head is mounted on the top of the support rod, the pressure sensor is fixed on the support rod, a signal converter is arranged in the meter head, a display screen is arranged on the meter head, and the signal converter is in signal connection with the flow sensor and the pressure sensor.
6. The vortex shedding flowmeter with small flow measurement according to claim 1, wherein the waist tube is connected with reducing tubes at both ends, and the reducing tubes are connected with the conveying pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745100.7U CN217032610U (en) | 2022-04-01 | 2022-04-01 | Vortex shedding flowmeter with small flow measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220745100.7U CN217032610U (en) | 2022-04-01 | 2022-04-01 | Vortex shedding flowmeter with small flow measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217032610U true CN217032610U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220745100.7U Active CN217032610U (en) | 2022-04-01 | 2022-04-01 | Vortex shedding flowmeter with small flow measurement |
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| Country | Link |
|---|---|
| CN (1) | CN217032610U (en) |
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2022
- 2022-04-01 CN CN202220745100.7U patent/CN217032610U/en active Active
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