CN110864749A - Large-caliber anti-seismic vortex shedding flowmeter - Google Patents
Large-caliber anti-seismic vortex shedding flowmeter Download PDFInfo
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- CN110864749A CN110864749A CN201911245886.5A CN201911245886A CN110864749A CN 110864749 A CN110864749 A CN 110864749A CN 201911245886 A CN201911245886 A CN 201911245886A CN 110864749 A CN110864749 A CN 110864749A
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- probe
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- vortex shedding
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- 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
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/3209—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices
- G01F1/3218—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices bluff body design
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- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a large-caliber anti-seismic vortex shedding flowmeter which is provided with a meter body, wherein the meter body is communicated with a lower base, the upper end of the lower base is communicated with a connecting part, the connecting part and the lower base are communicated together with a first through hole, a probe rod is arranged in the first through hole, a sealing ring is sleeved on the outer circumference of the probe rod, and the probe rod is fixedly connected with the connecting part through a locking nut; the periphery cover of probe pole is equipped with the shielding rod, and the one end of shielding rod is equipped with the upper base, and the other end of shielding rod is connected and is equipped with the display gauge outfit, and the tip of probe pole is equipped with the probe, and the probe is connected with the display gauge outfit electricity, and the upper base passes through housing screw fixed connection with lower base. The invention has simple structure and convenient operation, improves the shock resistance of the invention, avoids the influence of external environment on the accuracy of the detection data of the invention, and can be widely applied to the technical field of flowmeter equipment.
Description
Technical Field
The invention relates to the technical field of flowmeter equipment, in particular to a large-caliber anti-seismic vortex shedding flowmeter.
Background
The principle of the vortex shedding flowmeter is that a non-streamlined vortex generating body (a bluff body) is arranged in a fluid, two rows of regular vortices are alternately generated from two sides of the vortex generating body, and the vortices are called Karman vortices. The vortex shedding flowmeter is a volume flowmeter for measuring the volume flow, standard condition volume flow or mass flow of gas, steam or liquid according to the karman vortex shedding principle.
It is known that the flow velocity distribution in a flow channel is divided into two states of laminar flow and turbulent flow. The velocity change of the laminar flow state flow velocity from the center to the side wall is large, and the laminar flow velocity is distributed in a parabolic shape; the turbulent flow has a large velocity gradient (called laminar boundary transition layer) near the side wall, and the velocity gradient changes little in most middle areas, and the distribution is in a flow velocity shape. With the higher Reynolds number, the thickness of the laminar boundary layer with large velocity gradient change becomes thinner and thinner, and higher requirements are put forward on the accurate detection position of the probe.
The detection probe in the prior art is fixedly connected with a meter body by screws by taking a graphite gasket as a seal, so that the detection probe is poor in sealing performance and cannot play a good role in anti-vibration performance. In practical application, due to external influence, a conveying pipeline of fluid to be measured and a meter body of the vortex shedding flowmeter often generate vibration, and the vibration is conducted to a detection probe through the fluid to be measured, so that detection data are inaccurate.
Disclosure of Invention
The invention aims to solve the technical defects and provide the large-caliber anti-seismic vortex shedding flowmeter with good anti-seismic performance and accurate detection data.
Therefore, the invention provides a large-caliber anti-seismic vortex shedding flowmeter which is provided with a meter body, wherein the meter body is provided with a fluid pipeline, a triangular column is arranged in the fluid pipeline, the side wall of the fluid pipeline is communicated with a lower base, the upper end of the lower base is communicated with a connecting part, the connecting part and the lower base are communicated together and provided with a first through hole, and the first through hole is communicated with the fluid pipeline; the outer circumference of the connecting part is provided with external threads, a probe rod is arranged in the first through hole, a sealing ring is sleeved on the outer circumference of the probe rod and clamped between the probe rod and the first through hole, and the probe rod is fixedly connected with the connecting part through a locking nut; the periphery cover of probe pole is equipped with the shielding rod, and the one end of shielding rod is equipped with the upper base, and the other end of shielding rod is connected and is equipped with the display gauge outfit, and the tip of probe pole is equipped with the probe, and the probe is connected with the display gauge outfit electricity, and the upper base passes through housing screw fixed connection with lower base.
Preferably, the probe rod comprises an outer probe rod and an inner probe rod, and the outer probe rod is fixedly connected to the periphery of the inner probe rod.
Preferably, the probe is located within one third of the internal diameter of the fluid conduit.
Preferably, the outer circumference of the upper end of the shielding rod is provided with an external thread, the lower end of the display gauge outfit is provided with an internal thread, and the shielding rod is fixedly connected with the display gauge outfit through a shielding cap.
Preferably, the sealing ring is a sealing copper ring.
The invention provides a large-caliber anti-seismic vortex shedding flowmeter, which has the following beneficial effects:
the invention is provided with the outer probe rod and the inner probe rod, the arrangement of the outer probe rod ensures that the inner probe rod can also be stably fixed in the fluid pipeline in a lengthened state, and the detection position of the probe is closer to the central point of the fluid pipeline, thereby improving the linearity and accuracy of the detection data of the invention and ensuring that the detection data is more accurate and reliable. In order to ensure the accuracy of detection data, the inner diameter of a fluid pipeline of the conventional large-caliber vortex shedding flowmeter can only reach 400mm, and the invention can still ensure the accuracy of the detection data when the inner diameter of the fluid pipeline reaches 2000mm, thereby expanding the application range of the invention.
And due to the arrangement of the outer probe rod, when no flow exists in the fluid pipeline, signals caused by vibration of the fluid pipeline are received by the outer probe rod and cannot be transmitted to the probe, and only the signals generated by the triangular column can be received by the probe on the premise that the fluid pipeline has the flow, so that the shock resistance of the invention is greatly improved, and the lower limit measurement range of the invention and the accuracy of detection data are improved.
According to the invention, the probe rod and the meter body are fixedly connected together through the locking nut, and the sealing copper ring is used as sealing, so that the original screw fixed connection is replaced, the integral sealing property and shock resistance are improved, and the accuracy of detection data is indirectly improved.
The invention has simple structure and convenient operation, improves the shock resistance and the accuracy of detection data, and enlarges the application range of the invention.
Drawings
FIG. 1 is a schematic structural view in cross-section of the present invention;
FIG. 2 is a schematic illustration of an explosive structure of the present invention;
fig. 3 is a partially enlarged view of a portion a shown in fig. 1.
The labels in the figure are: 1. the meter comprises a meter body, 2. a fluid pipeline, 3. a triangular column, 4. a lower base, 5. a connecting part, 6. a first through hole, 7. a probe rod, 8. a sealing ring, 9. a locking nut, 10. a shielding rod, 11. a second through hole, 12. an upper base, 13. a display meter head, 14. a probe, 15. a compression screw, 16. a shielding cap, 17. an outer probe rod, 18. an inner probe rod and 19. a rubber ring.
Detailed Description
The invention is further described below in conjunction with the drawings and the specific embodiments to assist in understanding the contents of the invention. The method used in the invention is a conventional method if no special provisions are made; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.
As shown in fig. 1-3, the present invention provides a large-diameter anti-seismic vortex street flowmeter, which comprises a meter body 1, wherein the meter body 1 is provided with a fluid pipeline 2, a triangular column 3 is arranged in the fluid pipeline 2, the triangular column 3 is fixedly connected with the inner wall of the fluid pipeline 2, and the triangular column 3 is a vortex generator, so as to generate strong vortex and improve the signal-to-noise ratio. The lateral wall intercommunication of circulation pipeline 2 is equipped with lower base 4, and the upper end intercommunication of lower base 4 is equipped with connecting portion 5, and connecting portion 5, lower base 4 communicate jointly and are equipped with first through-hole 6, and first through-hole 6 is linked together with fluid pipeline 2. The outer circumference of the connecting portion 5 is provided with external threads, a probe rod 7 is arranged in the first through hole 6, the probe rod 7 comprises an outer probe rod 17 and an inner probe rod 18, the outer probe rod 17 is fixedly connected to the periphery of the inner probe rod 18, a probe 14 is arranged at the end portion of the inner probe rod 18, and the probe 14 is arranged at one third of the inner diameter of the fluid pipeline 2. The outer circumference cover of outer probe rod 17 is equipped with sealing washer 8, and the sealing washer 8 card is located between outer probe rod 17 and first through-hole 6, and outer probe rod 17 passes through lock nut 9 and connecting portion 5 fixed connection. The sealing ring 8 is a sealing copper ring, and the sealing copper ring plays a role in sealing and fastening so as to prevent fluid in the fluid pipeline 2 from entering the probe rod 7. The periphery cover of outer probe pole 17 is equipped with shielding rod 10, and shielding rod 10 link up and is equipped with second through-hole 11, and outer probe pole 17 is located in the second through-hole 11. An upper base 12 is communicated with one end of the shielding rod 10, a display meter 13 is communicated with the other end of the shielding rod 10, the probe 14 penetrates through the first through hole 6 and the second through hole 11 through a control circuit to be electrically connected with the display meter 13, the upper base 12 is sleeved on the periphery of the connecting portion 5 and the periphery of the locking nut 9 and is fixedly connected with the lower base 4 through a compression screw 15, and the probe rod 7 is fixed in the shielding rod 10.
The arrangement of the outer probe rod 17 ensures that the inner probe rod 18 can also be stably fixed in the fluid pipeline 2 in a lengthened state, so that the detection position of the probe 14 is closer to the central point of the fluid pipeline 2, the linearity and the accuracy of the detection of the invention are improved, and the detected data are more accurate and reliable. When the inner diameter of the fluid pipeline 2 is enlarged to 2000mm, the accuracy of detection data can still be ensured, so that the application range of the invention is wider. And because of the arrangement of the outer probe rod 17, when there is no flow in the fluid pipeline 2, the signal caused by the vibration of the fluid pipeline 2 is received by the outer probe rod 17 and can not be transmitted to the probe 14, and the signal generated by the triangular column 3 can be received by the probe 14 only on the premise that the fluid pipeline 2 has flow, thereby greatly improving the shock resistance of the invention and improving the measurement range of the lower limit of the invention.
The outer circumference of the upper end of the shielding rod 10 is provided with an external thread, the lower end of the display meter head 13 is provided with an internal thread, the shielding rod 10 is fixedly connected with the display meter head 13 through a shielding cap 16, and the display meter head 13 is not inverted due to the arrangement of the shielding cap 16.
When the probe is used, the sealing ring 8 is sleeved on the outer circumference of the outer probe rod 17, the outer probe rod 17 is inserted into the first through hole 6, the probe 14 is positioned at one third of the inner diameter of the fluid pipeline 2, the locking nut 9 is sleeved on the periphery of the connecting part 5 to be fixed, and the probe rod 7 is fixed accordingly. The shielding rod 10 is sleeved on the periphery of the probe rod 7, and the shielding rod 10 and the watch body 1 are fixedly connected together by a compression screw 15. The shielding cap 16 is connected to the upper end of the shielding rod 10 in a threaded manner, a rubber ring 19 is sleeved on the shielding cap, a control circuit of the probe 14 is connected with the display meter head 13, the display meter head 13 is connected to the upper end of the shielding rod 10 in a threaded manner, the shielding cap 16 rotates back, and the rubber ring 19 is extruded between the shielding cap 16 and the display meter head 13 so that the display meter head 13 does not rotate. After the display meter head 13 is fixed, the meter body 1 is connected with a conveying pipeline of the fluid to be measured, and then flow detection can be carried out.
In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "in communication" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (5)
1. A large-caliber anti-seismic vortex shedding flowmeter is provided with a meter body, wherein the meter body is provided with a fluid pipeline, and a triangular prism is arranged in the fluid pipeline; the outer circumference of the connecting part is provided with external threads, a probe rod is arranged in the first through hole, a sealing ring is sleeved on the outer circumference of the probe rod and clamped between the probe rod and the first through hole, and the probe rod is fixedly connected with the connecting part through a locking nut; the periphery cover of probe pole is equipped with the shielding rod, the one end of shielding rod is equipped with the base, the other end connection of shielding rod is equipped with the display gauge outfit, the tip of probe pole is equipped with the probe, the probe with the display gauge outfit electricity is connected, the upper base with the base passes through housing screw fixed connection down.
2. The large-caliber anti-seismic vortex shedding flowmeter according to claim 1, wherein the probe rod comprises an outer probe rod and an inner probe rod, and the outer probe rod is fixedly connected to the periphery of the inner probe rod.
3. A large bore anti-seismic vortex shedding flowmeter according to claim 1, wherein said probe is disposed within one third of the inner diameter of said fluid conduit.
4. The large-caliber anti-seismic vortex shedding flowmeter according to claim 1, wherein an outer circumference of an upper end of the shielding rod is provided with an external thread, a lower end of the display meter head is provided with an internal thread, and the shielding rod is fixedly connected with the display meter head through a shielding cap.
5. The large-caliber anti-seismic vortex shedding flowmeter according to claim 1, wherein the sealing ring is a copper sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245886.5A CN110864749A (en) | 2019-12-07 | 2019-12-07 | Large-caliber anti-seismic vortex shedding flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245886.5A CN110864749A (en) | 2019-12-07 | 2019-12-07 | Large-caliber anti-seismic vortex shedding flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN110864749A true CN110864749A (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911245886.5A Pending CN110864749A (en) | 2019-12-07 | 2019-12-07 | Large-caliber anti-seismic vortex shedding flowmeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649790A (en) * | 2020-06-13 | 2020-09-11 | 江苏华海测控技术有限公司 | Antidetonation type digit vortex flowmeter |
-
2019
- 2019-12-07 CN CN201911245886.5A patent/CN110864749A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649790A (en) * | 2020-06-13 | 2020-09-11 | 江苏华海测控技术有限公司 | Antidetonation type digit vortex flowmeter |
| CN111649790B (en) * | 2020-06-13 | 2022-01-21 | 江苏华海测控技术有限公司 | Antidetonation type digit vortex flowmeter |
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