CN210952964U - Large-caliber anti-seismic vortex shedding flowmeter - Google Patents

Abstract

The utility model 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 utility model discloses simple structure, convenient operation has improved the utility model discloses an external environment influence has been avoided to the shock resistance the utility model discloses the accuracy of detected data, but wide application in flowmeter equipment technical field.

Description

Large-caliber anti-seismic vortex shedding flowmeter

Technical Field

The utility model relates to a flowmeter equipment technical field, in particular to heavy-calibre antidetonation vortex street 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 utility model aims at solving the technical deficiencies, provide a big-bore antidetonation vortex shedding flowmeter that anti-seismic performance is good, the detection data is accurate.

Therefore, the utility model 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 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 utility model provides a heavy-calibre antidetonation vortex street flowmeter has following beneficial effect:

the utility model discloses be equipped with outer probe rod and interior probe rod, the setting up of outer probe rod makes in the probe rod also can be stable be fixed in the fluid pipeline under elongated state, makes the detection position that the probe was located more be close to the central point of fluid pipeline, has improved the utility model discloses the linearity and the degree of accuracy of detection data make the data that detect more accurate reliable. In order to guarantee the accuracy of data detection, current heavy-calibre vortex flowmeter, the fluid pipeline internal diameter can only reach 400mm, the utility model discloses can be in the fluid pipeline when reaching 2000mm, still guarantee the accuracy of data detection, enlarged the utility model discloses an application scope.

And because the setting of outer probe pole for when no flow in fluid pipeline, the signal that fluid pipeline vibrations arouses is received by outer probe pole and consequently can not transmit the probe, and only fluid pipeline has the signal that the triangular prism produced under the prerequisite of flow could be received by the probe, thereby has improved greatly the utility model discloses an anti-seismic has improved the utility model discloses a measuring range of lower limit and the accuracy of detected data.

The utility model discloses a lock nut will be probed the pole and is in the same place with table body fixed connection, and regard as sealed copper ring as sealed, has replaced original screw fixed connection, has improved holistic leakproofness and shock resistance, has indirectly improved the accuracy of detection data.

The utility model discloses simple structure, convenient operation has improved the utility model discloses an anti-seismic and the accuracy of detecting data have enlarged the utility model discloses an application scope.

Drawings

Fig. 1 is a schematic structural view of a cross-sectional view of the present invention;

fig. 2 is a schematic diagram of the explosion 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 will be further described with reference to the accompanying drawings and specific embodiments to assist understanding of the invention. The method used in the utility model is a conventional method if no special regulation is provided; the raw materials and the apparatus used are, unless otherwise specified, conventional commercially available products.

By shown in fig. 1-3, the utility model provides a heavy-calibre antidetonation vortex flowmeter, it is equipped with the table body 1, and table body 1 is equipped with fluid pipeline 2, is equipped with triangular prism 3 in the fluid pipeline 2, and triangular prism 3 is the swirl emergence body with fluid pipeline 2's inner wall fixed connection, triangular prism 3 to can produce strong swirl, improve the SNR. The lateral wall intercommunication of fluid 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 setting up of outer probe rod 17 makes in probe rod 18 also can be stable be fixed in fluid pipeline 2 under the elongated state, makes the detection position that probe 14 was located more be close to fluid pipeline 2's central point, has improved the utility model discloses the linearity and the degree of accuracy that detect make the data that detect more accurate reliable. When the 2 internal diameters of fluid pipeline enlarge to 2000mm, still can guarantee the accuracy of testing data, make the utility model discloses the scope of application is wider. And because the setting of outer probe pole 17 for when no flow in fluid pipeline 2, the signal that fluid pipeline 2 vibrations arouse is received by outer probe pole 17 and consequently can not be transmitted probe 14, and only fluid pipeline 2 has the signal that triangular prism 3 produced under the prerequisite of flow can only be received by probe 14, thereby has improved greatly the utility model discloses an anti-seismic property has improved the utility model discloses a measuring range of lower limit.

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 should be understood that the terms "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of 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 therefore, 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 an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that 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.

Images