CN219391003U - Vortex street flowmeter - Google Patents

Abstract

The utility model provides a vortex shedding flowmeter, which comprises: the device comprises a pipe body, a converter, a strain sensor, a vortex generator and a dynamic sealing piece, wherein the side surface of the pipe body is provided with a mounting hole, the dynamic sealing piece is embedded in the mounting hole, the strain sensor is detachably arranged on the outer surface of the pipe body, a part of an elastic sensing element of the strain sensor penetrates through the dynamic sealing piece to extend into the inner side of the pipe body, the converter is arranged on the outer side of the pipe body and is in signal connection with the strain sensor, and the vortex generator is fixedly arranged in the pipe body and is located at the upstream of the elastic sensing element. The vortex shedding flowmeter adopts the dynamic sealing piece to seal the fixed end of the elastic sensitive element of the strain sensor, thereby effectively improving the adaptability of the vortex shedding flowmeter in corrosive fluid and simultaneously not affecting the accuracy of flow detection.

Description

Vortex street flowmeter

Technical Field

The utility model relates to the field of metering equipment, in particular to a vortex shedding flowmeter.

Background

The vortex street flowmeter measures flow by using the principle that fluid oscillation generates karman vortex street, and the measuring range of the vortex street flowmeter widely covers various mediums such as gas, liquid, steam and the like, so the vortex street flowmeter is widely applied to flow measurement of various fluid mediums. Because the main measuring component is made of metal materials, the measuring device is not suitable for measuring corrosive media such as chlorine, corrosive liquid and the like.

At present, a common anti-corrosion vortex shedding flowmeter is generally provided with an anti-corrosion coating in a measuring channel, a corresponding sensor component is embedded at the bottom of the anti-corrosion coating to achieve the effect of adapting to corrosive media, and the shielding of the anti-corrosion coating also reduces the sensitivity of a corresponding sensor.

How to provide a strain sensor vortex shedding flowmeter for corrosive media is a technical problem to be solved.

Disclosure of Invention

In view of the above, the utility model provides a vortex shedding flowmeter, which aims to solve the problem of poor corrosion resistance of the vortex shedding flowmeter adopting a strain sensor.

The technical scheme of the utility model is realized as follows: the utility model provides a vortex shedding flowmeter, comprising: the device comprises a pipe body, a converter, a strain sensor, a vortex generator and a dynamic seal piece, wherein the side surface of the pipe body is provided with a mounting hole, the dynamic seal piece is embedded in the mounting hole, the strain sensor is detachably arranged on the outer surface of the pipe body, a part of an elastic sensitive element of the strain sensor penetrates through the dynamic seal piece to extend into the inner side of the pipe body, the elastic sensitive element is in sealing connection with the dynamic seal, the converter is arranged on the outer side of the pipe body and in signal connection with the strain sensor, and the vortex generator is fixedly arranged in the pipe body and is positioned at the upstream of the elastic sensitive element.

In some embodiments, the dynamic seal piece includes base and slide, and the one side that the body was kept away from to the base is equipped with the spout, has seted up the through-hole in the spout, and the through-hole communicates each other with the body inboard, and the elasticity sensing element link up the through-hole and with through-hole inner wall interval setting, and the surface mounting that the elasticity sensing element is close to the through-hole inner wall is provided with the slide, the slide slides and sets up in the spout, and slide and spout surface laminating set up.

In some embodiments, the length direction of the sliding groove is parallel to the length direction of the pipe body, and the cross section of the sliding groove is arc-shaped.

In some embodiments, the sensor comprises a sensor mounting seat, wherein the sensor mounting seat is detachably arranged on the surface of the pipe body, the base is detachably arranged on one surface, close to the pipe body, of the sensor mounting seat, and the strain sensor is fixedly arranged in the sensor mounting seat.

In some embodiments, the sensor further comprises a support rod detachably mounted on one surface of the sensor mounting base away from the tube body, and the converter is detachably mounted on one end of the support rod away from the sensor mounting base.

In some embodiments, the support rod is hollow, a communication cable is arranged in the support rod, and the strain sensor is in signal connection with the converter through the communication cable.

In some embodiments, the pipe further comprises an FEP corrosion-resistant layer, wherein the FEP corrosion-resistant layer is arranged on the inner wall of the pipe body and the surface of the vortex generator in a fitting way.

In some embodiments, the surface of the dynamic seal adjacent the inside of the tube is flush with the surface of the FEP corrosion barrier.

In some embodiments, the vortex generating body is a twin vortex generating body.

In some embodiments, the vortex generating body is a triangular prism, the length direction of the vortex generating body is parallel to the extending direction of the elastic sensing element, and the plane of the axis of the vortex generating body and the axis of the elastic sensing element is parallel to the axis of the pipe body.

Compared with the prior art, the vortex shedding flowmeter has the following beneficial effects:

(1) The vortex shedding flowmeter adopts an independent dynamic sealing device to conduct dynamic sealing treatment on the fixed end of the elastic sensitive element of the strain sensor, so that the corrosion resistance of the strain sensor in the working process is effectively improved, and corrosive fluid is prevented from directly contacting with the strain sensor and devices outside the pipe body through the fixed end of the elastic sensitive element;

(2) The strain sensor adopted in the vortex shedding flowmeter is detachably connected and detachably arranged on the outer side of the pipe body, so that the vortex shedding flowmeter is easier to detach and maintain, and can be better suitable for flow measurement of corrosive fluid.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a vortex shedding flowmeter of the present utility model;

FIG. 2 is a front cross-sectional view of the vortex shedding flowmeter of the present utility model;

FIG. 3 is an isometric view of a portion of a dynamic seal in a vortex shedding flowmeter of the present utility model;

FIG. 4 is an exploded view of FIG. 3;

fig. 5 is a front cross-sectional view of fig. 3.

In the figure: 1-pipe body, 2-converter, 3-strain transducer, 4-vortex generator, 5-dynamic seal piece, 31-elasticity sensitive element, 51-base, 52-slider, 511-spout, 512-through-hole, 6-sensor mount pad, 7-bracing piece, 8-FEP anticorrosive coating.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Unless defined otherwise, all technical terms and science used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present utility model belong. If the definitions set forth in this section are contrary to or otherwise inconsistent with the definitions set forth in the patents, patent applications, published patent applications and other publications incorporated herein by reference, the definitions set forth in this section are preferentially set forth in the definitions set forth herein.

As shown in fig. 1, in combination with fig. 2 to 5, one embodiment of the vortex shedding flowmeter of the present utility model comprises: the device comprises a pipe body 1, a converter 2, a strain sensor 3, a vortex generator 4 and a dynamic seal piece 5, wherein a mounting hole is formed in the side face of the pipe body 1, the dynamic seal piece 5 is embedded in the mounting hole, the strain sensor 3 is detachably arranged on the outer surface of the pipe body 1, the strain sensor 3 comprises an elastic sensitive element 31, the free end of the elastic sensitive element 31 penetrates through the seal piece 5 and stretches into the inner side of the pipe body 1, the converter 2 is arranged on the outer side of the pipe body 1, the converter 2 is in signal connection with the strain sensor 3, and the vortex generator 4 is fixedly arranged in the pipe body 1 and is located at the upstream of the elastic sensitive element 31.

In the above embodiment, the pipe body 1 provides a channel for fluid circulation, the side surface of the pipe body 1 is provided with a mounting hole for providing a space for mounting and moving the elastic sensing element 31 of the strain sensor 3, specifically, the elastic sensing element 31 penetrates through the mounting hole to extend into the inner side of the pipe body 1, the elastic sensing element 31 is used for directly contacting with a fluid to be measured, so that stress deformation occurs under the action of the fluid, it should be understood that the strain sensor 3 and the corresponding elastic sensing element 31 are all of the prior art, the working principle and the process of the strain sensor 3 are not repeated herein, in order to realize the protection of the strain sensor 3 and components located on the outer side of the pipe body 1, the dynamic sealing element 5 is embedded and mounted in the mounting hole, the dynamic sealing element 5 is in sealing connection with the mounting hole, the elastic sensing element 31 penetrates through the dynamic sealing element 5 and then enters the pipe body 1, and the dynamic sealing element 5 and the elastic sensing element 31 are in dynamic sealing.

In the above embodiment, the elastic sensor 31 may be a strain type elastic sensor 31 or a stress type elastic sensor 31.

In the above embodiment, the vortex generating body 4 needs to be installed at the upstream of the elastic sensing element 31, and the fluid forms a vortex after passing through the vortex generating body 4 and flows through the side surface of the elastic sensing element 31, so as to realize flow measurement, and in the flow measurement process, the elastic sensing element 31 is deformed under the action of the vortex, the dynamic seal 5 is deformed along with the deformation of the elastic sensing element 31, and the tightness of the elastic sensing element 31 at the installation hole is maintained.

In some embodiments, the dynamic seal 5 includes a base 51 and a sliding piece 52, one surface of the base 51 far away from the pipe body 1 is provided with a sliding groove 511, a through hole 512 is formed in the sliding groove 511, the through hole 512 is mutually communicated with the inner side of the pipe body 1, the elastic sensitive element 31 penetrates through the through hole 512 and is arranged at intervals with the inner wall of the through hole 512, the sliding piece 52 is fixedly arranged on the surface of the elastic sensitive element 31 close to the inner wall of the through hole 512, the sliding piece 52 is slidably arranged in the sliding groove 511, and the sliding piece 52 is in fit with the surface of the sliding groove 511.

In the above embodiment, the sliding piece 52 is slidably disposed in the sliding groove 511, and one surface of the sliding piece 52 close to the sliding groove 511 is in sealing engagement with the surface of the sliding groove 511, the elastic sensing element 31 penetrates the sliding piece 52 and is in full close engagement with the connection portion of the sliding piece 52, at this time, the sliding piece 52 is always in engagement with the surface of the sliding groove 511 in the swinging process of the elastic sensing element 31 in the through hole 512, and in this process, the sliding piece 52 completely covers the through hole 512, so that dynamic sealing can be achieved between the elastic sensing element 31 and the mounting hole in the swinging process of the elastic sensing element 31 due to deformation.

In some embodiments, the length direction of the sliding groove 511 is parallel to the length direction of the pipe body 1, and the cross section of the sliding groove 511 is circular arc.

In the above embodiment, when the elastic sensing element 31 is deformed by the swirling action in the fluid, the oscillation is generated perpendicular to the length direction of the tube body 1, and the fulcrum of the oscillation is located at the fixed end of the elastic sensing element 31, so that the oscillation of the free end of the elastic sensing element 31 is a fan-shaped oscillation, the motion track of any point on the sliding plate 52 mounted on the surface of the elastic sensing element 31 is actually approximate or circular arc, and at this time, the fixed sliding slot 511 and the oscillating sliding plate 52 can always keep good close connection effect by setting the sliding slot 511 to the circular arc, and it should be understood that the oscillation amplitude of the elastic sensing element 31 is actually small, and therefore, the circular arc shape of the sliding slot 511 and the sliding plate 52 can be a perfect circular arc, which is more convenient for processing; meanwhile, the sliding groove 511 and the sliding piece 52 adopt the same surface structure as the swing shape of the free end of the elastic sensitive element 31, so that the swing resistance of the free end of the elastic sensitive element 31 can be reduced, and the good detection accuracy of the vortex shedding flowmeter can be maintained.

In some embodiments, both the base 51 and the slide 52 are made of FEP.

The FEP material not only has good corrosion resistance, but also has certain sealing property.

In some embodiments, the strain sensor further comprises a sensor mounting seat 6, the sensor mounting seat 6 is detachably mounted on the surface of the pipe body 1, the base 51 is detachably mounted on one surface of the sensor mounting seat 6, which is close to the pipe body 1, and the strain sensor 3 is fixedly mounted in the sensor mounting seat 6.

In the above embodiment, the sensor mounting seat 6 is provided with the corresponding opening for docking with the mounting hole, and the strain sensor 3 is mounted in the sensor mounting seat 6, so that the local packaging of the strain sensor 3 can be realized, and the corrosive fluid in the pipe body 1 is further prevented from entering other devices, and as a specific exemplary example, the sensor mounting seat 6 is mounted on the surface of the pipe body 1 by fastening the bolts.

In some embodiments, the surface of the tube 1 is provided with a locating counterbore in which the sensor mount 6 is embedded.

In the above embodiment, the quick positioning and mounting of the sensor mounting seat 6 can be realized through the positioning counter bore, and meanwhile, the counter bore can increase the contact area between the sensor mounting seat 6 and the pipe body 1, so that the contact tightness is improved.

In some embodiments. A sealing structure is further arranged between the sensor mounting seat 6 and the pipe body 1, and the sealing structure comprises a sealing ring, a labyrinth sealing groove or other existing sealing structures.

In the above embodiment, the sealing property between the sensor mount 6 and the pipe body 1 can be further improved by providing a separate sealing structure, and leakage of corrosive fluid in the pipe body 1 is avoided.

In some embodiments, the sensor further comprises a support rod 7, wherein the support rod 7 is detachably mounted on one surface of the sensor mounting seat 6 away from the pipe body 1, and the converter 2 is detachably mounted on one end of the support rod 7 away from the sensor mounting seat 6.

In the above embodiment, the supporting rod 7 is mainly used for supporting the converter 2, so that the distance between the converter 2 and the pipe body 1 is prevented from being too short, on one hand, the use safety of the converter 2 is ensured, and on the other hand, the operation convenience of the converter 2 is improved.

In some embodiments, one end of the support rod 7 is fixedly mounted on the side of the sensor mounting seat 6 away from the pipe body 1 through bolts, and the transducer 2 is fixedly mounted on the end of the support rod 7 away from the sensor mounting seat 6 through a flange structure.

In some embodiments, the support rod 7 may be a support rod 7 with a fixed structure, or a support rod 7 with a bendable posture can be used.

In some embodiments, the support rod 7 is hollow, and a communication cable is disposed in the support rod 7, and the strain sensor 3 is in signal connection with the converter 2 through the communication cable.

In the above embodiments, the hollow support rod 7 can protect the communication cable.

In some embodiments, the pipe body further comprises an FEP corrosion-resistant layer 8, and the FEP corrosion-resistant layer 8 is arranged on the inner wall of the pipe body 1 and the surface of the vortex generator 4 in a fitting way.

In the above embodiment, the FEP anticorrosive layer 8 can protect the pipe body 1 and the vortex generator body 4, so as to avoid corrosion of corrosive fluid to the pipe body 1 and the vortex generator body, and the FEP material has good corrosion resistance and high-temperature and high-pressure stability, so that the applicable scene range of the vortex shedding flowmeter can be improved in the pipe body 1.

In some embodiments, the surface of the dynamic seal 5 adjacent the inside of the tubular body 1 is flush with the surface of the FEP corrosion barrier 8.

The FEP material described in the above embodiments is a fluorinated ethylene propylene copolymer material.

In the above embodiment, the flush arrangement can reduce turbulence of the fluid in the pipe body 1 as much as possible, thereby being beneficial to improving the measurement accuracy of the vortex shedding flowmeter.

In some embodiments, the vortex-generating body 4 is a double vortex-generating body.

In some embodiments, the vortex generating body 4 is a triangular prism, the length direction of the vortex generating body 4 is parallel to the extending direction of the elastic sensing element 31, and the plane of the axis of the vortex generating body 4 and the axis of the elastic sensing element 31 is parallel to the axis of the pipe body 1.

In the above embodiment, as a preferable structure, the vortex generating body 4 of the triangular prism regularly generates vortices on two sides, and the vortices on the two sides symmetrically pass through the two sides of the elastic sensing element 31, so that the accuracy of the detection result can be effectively improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A vortex shedding flowmeter, comprising: the device comprises a pipe body, a converter, a strain sensor, a vortex generator and a dynamic sealing piece, wherein the side surface of the pipe body is provided with a mounting hole, the dynamic sealing piece is embedded in the mounting hole, the strain sensor is detachably arranged on the outer surface of the pipe body, a part of an elastic sensitive element of the strain sensor penetrates through the dynamic sealing piece to extend into the inner side of the pipe body, the elastic sensitive element is in sealing connection with the dynamic seal, the converter is arranged on the outer side of the pipe body and is in signal connection with the strain sensor, and the vortex generator is fixedly arranged in the pipe body and is positioned at the upstream of the elastic sensitive element.

2. The vortex shedding flowmeter of claim 1, wherein the dynamic seal comprises a base and a sliding piece, a sliding groove is arranged on one surface of the base far away from the pipe body, a through hole is formed in the sliding groove, the through hole is communicated with the inner side of the pipe body, the elastic sensitive element penetrates through the through hole and is arranged at intervals with the inner wall of the through hole, the sliding piece is fixedly arranged on the surface of the elastic sensitive element close to the inner wall of the through hole, the sliding piece is arranged in the sliding groove in a sliding manner, and the sliding piece is attached to the surface of the sliding groove.

3. The vortex shedding flowmeter of claim 2, wherein the length direction of the chute is parallel to the length direction of the tube body, and the cross section of the chute is circular arc.

4. The vortex shedding flowmeter of claim 2, further comprising a sensor mount removably mounted to the body surface, the base removably mounted to a side of the sensor mount proximate the body, the strain sensor fixedly mounted within the sensor mount.

5. The vortex shedding flowmeter of claim 4, further comprising a support bar removably mounted to a side of the sensor mount remote from the tube, the transducer removably mounted to an end of the support bar remote from the sensor mount.

6. The vortex shedding flowmeter of claim 5, wherein the support rod is hollow, a communication cable is disposed in the support rod, and the strain sensor is in signal connection with the transducer through the communication cable.

7. The vortex shedding flowmeter of claim 1, further comprising an FEP corrosion resistant layer disposed in contact with the inner wall of the pipe body and the surface of the vortex generator.

8. The vortex shedding flowmeter of claim 7, wherein a surface of the dynamic seal adjacent the inside of the pipe body is flush with the FEP corrosion resistant layer surface.

9. The vortex flowmeter of claim 1 wherein said vortex generating body is a twin vortex generating body.

10. The vortex flowmeter of claim 9 wherein the vortex generating body is a triangular prism, the length direction of the vortex generating body is parallel to the extending direction of the elastic sensing element, and the plane of the axis of the vortex generating body and the axis of the elastic sensing element is parallel to the axis of the pipe body.