CN215524714U

CN215524714U - Plug-in vortex shedding flowmeter for responding vortex

Info

Publication number: CN215524714U
Application number: CN202121816279.2U
Authority: CN
Inventors: 唐贤昭; 李洋
Original assignee: Jiangsu Wini Electronic Co ltd
Current assignee: Jiangsu Wini Electronic Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-14
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses an insertion type vortex shedding flowmeter for responding to a vortex, which relates to the field of vortex shedding flowmeters and comprises a generator shell, wherein the generator shell is a tubular shell, the side surface of the front part of the generator shell is provided with an inlet, the side surface of the rear part of the generator shell is provided with an outlet, the generator shell consists of an inner shell and an outer shell covering the outer side of the inner shell, the inner shell is in a straight cylinder shape, the outer contour of the outer shell is an arc line similar to the outline of a water drop, the vertical section of the outer shell is wide in front and narrow in back along the arc line from the inlet end to the outlet end, and a generator is arranged in the inner cavity of the inner shell close to the inlet end; a supporting pipe which is vertically arranged is fixed above the generator shell, an inserted steel pipe is arranged in the supporting pipe, and the inserted steel pipe extends to the inner cavity of the inner shell. In the utility model, the outer shell is designed to be streamline, thus effectively reducing the vortex generated by the generator shell and improving the measurement precision.

Description

Plug-in vortex shedding flowmeter for responding vortex

Technical Field

The utility model relates to the field of vortex street flowmeters, in particular to an inserted vortex street flowmeter for responding to a vortex.

Background

The vortex street flowmeter is mainly applied to the measurement of industrial pipeline medium fluid, and is characterized by small pressure loss, wide range and high measurement precision, the vortex street refers to that fluid vibration is generated at the rear part of the blunt body in the flowing direction to form two rows of alternately generated vortices, and at present, all plug-in vortex street flowmeters shells can be regarded as blunt bodies in fluid mechanics for the convenience of manufacturing.

In the use process, the medium flows through the plug-in vortex street flowmeter shell to generate vortex street, the medium also generates vortex street when flowing through the internal generating body of the plug-in vortex street flowmeter shell, the two vortex streets can generate mutual interference, and vortex street signals received by the sensor are the result after the interference, so that the measurement precision is reduced.

Disclosure of Invention

The utility model aims to provide an insertion vortex shedding flowmeter for vortex.

The innovation point of the utility model is that the outer shell is designed to be streamline, thus effectively reducing the vortex generated by the generator shell and improving the measurement precision.

In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows: an insertion vortex shedding flowmeter for dealing with vortexes comprises a generator shell, wherein the generator shell is a tubular shell, an inlet is formed in the side face of the front portion of the generator shell, an outlet is formed in the side face of the rear portion of the generator shell, the generator shell is composed of an inner shell and an outer shell covering the outer side of the inner shell, the inner shell is in a straight tube shape, the outer outline of the outer shell is an arc line similar to the outline of a water drop, the vertical section of the outer shell is wide in the front and narrow in the back along the arc line from an inlet end to an outlet end, a generator is arranged in the inner cavity of the inner shell close to the inlet end, and the generator is a vertically arranged cylinder which is along the diameter direction of the circular section of the inner shell of the generator and is fixedly connected to the inner shell at two ends; the generator shell is fixed with a supporting pipe which is vertically arranged above the generator shell, an inserted steel pipe is arranged in the supporting pipe, the inserted steel pipe extends to the inner cavity of the inner shell, and the inserted steel pipe is positioned behind the generator body opposite to the inlet end of the generator shell. In the utility model, the outer shell is designed to be streamline, thus effectively reducing the vortex generated by the generator shell and improving the measurement precision.

Furthermore, the plug-in steel pipe consists of a lower connecting rod, a connecting pipe and an upper connecting rod which are concentric with the central shaft, the upper connecting rod is inserted into the top port of the connecting pipe, the upper connecting rod is hermetically connected with the connecting pipe, the lower connecting rod is inserted into the connecting pipe and extends to be close to the upper connecting rod, and the interface of the lower connecting rod and the connecting pipe is welded and sealed; the lower connecting rod and the upper connecting rod are communicated through the central through hole, the outer diameter of the lower connecting rod is smaller than the inner diameter of the connecting pipe, and rubber is filled in a gap between the connecting pipe and the lower connecting rod. According to the utility model, because the measurement precision is reduced or the insertion tube is broken due to the vibration of the insertion tube, the measurement precision is improved and the risk of breakage is reduced by adding rubber to absorb the vibration.

Furthermore, a circle of convex ring is arranged at the position, close to the upper end, of the outer wall of the lower connecting rod, a counter bore for accommodating the convex ring is formed in the inner wall of the upper end opening of the connecting pipe, and the diameter of the counter bore is larger than that of the convex ring. The lower connecting rod can be hung in the connecting pipe, and the lower connecting rod is prevented from falling.

Furthermore, the outlet end of the inner shell is provided with a flaring section. The flared section facilitates rectifying the vortex.

Further, the inner shell and the outer shell are welded and connected into a whole. The welding connection structure is firm, and the operation is simple.

Further, the horizontal section of the generator is in an inverted trapezoid shape. The generation body induces the medium to generate vortex street by using the inverted trapezoidal section.

The utility model has the beneficial effects that:

1. in the utility model, the outer shell is designed to be streamline, thus effectively reducing the vortex generated by the generator shell and improving the measurement precision.

2. According to the utility model, because the measurement precision is reduced or the insertion tube is broken due to the vibration of the insertion tube, the measurement precision is improved and the risk of breakage is reduced by adding rubber to absorb the vibration.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a cross-sectional view of the insertion tube.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1: as shown in fig. 1, 2 and 3, the plug-in vortex street flowmeter for vortex comprises a generator shell 1, the generator shell 1 is a tubular shell, an inlet is formed in the side face of the front part of the generator, an outlet is formed in the side face of the rear part of the generator, the generator shell 1 is composed of an inner shell 1.1 and an outer shell 1.2 coated on the outer side of the inner shell, the inner shell 1.1 and the outer shell 1.2 are welded into a whole, the inner shell 1.1 is in a straight cylinder shape, the outer contour of the outer shell 1.2 is an arc line similar to the outline of a water drop, the vertical section of the outer shell 1.2 is wide in front and narrow in back along the arc line from the inlet end to the outlet end, a generator 2 is arranged in the inner cavity of the inner shell 1.1 close to the inlet end, an flaring section 1.11 is arranged at the outlet end of the inner shell 1.1, the generator 2 is a vertically arranged cylinder body which is fixedly connected to the inner shell 1.1 along the diameter direction of the circular section of the generator inner shell 1.1, and two ends of the generator 2 are in an inverted trapezoid horizontal section; a vertically arranged supporting tube 3 is fixed above the generator shell 1, an inserted steel tube 4 is arranged in the supporting tube 3, the inserted steel tube 4 extends to an inner cavity 1.2 of the inner shell, the inserted steel tube 4 is positioned at the rear part of the generator body 2 opposite to the inlet end of the generator shell 1, the inserted steel tube 4 consists of a lower connecting rod 4.1, a connecting tube 4.2 and an upper connecting rod 4.3 which are concentric with the central axis, the upper connecting rod 4.1 is inserted into the top port of the connecting tube 4.2, the upper connecting rod 4.1 is hermetically connected with the connecting tube 4.2 by 4.3, the lower connecting rod 4.3 is inserted into the connecting tube 4.2 and extends to be close to the upper connecting rod 4.1, and the interface of the lower connecting rod 4.3 and the connecting tube 4.2 is welded and sealed; the central through hole of lower connecting rod 4.3 and upper connecting rod 4.1 is just to the intercommunication, and lower connecting rod 4.1 external diameter is less than connecting pipe 4.2 internal diameter, is filled with rubber 4.4 in the space between connecting pipe 4.2 and the lower connecting rod 4.3, and the nearly upper end department of lower connecting rod 4.3 outer wall is equipped with round bulge loop 4.31, is equipped with the counter bore 4.32 that holds bulge loop 4.31 on the connecting pipe 4.2 upper end mouth inner wall, and the counter bore 4.32 diameter is greater than the bulge loop 4.31 diameter.

When the vortex street generator works, a flowmeter is placed in a pipeline, a medium flows through the generator shell 1 and flows from an inlet to an outlet of the generator shell 1, the medium forms a vortex street under the action of the generator body 2, the inserting pipe 4 is vibrated by the vortex street, and the vibration generated by the inserting pipe can generate a signal to be provided for other elements in the flowmeter.

The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. An insertion vortex shedding flowmeter for dealing with vortexes comprises a generator shell, wherein the generator shell is a tubular shell, an inlet is formed in the side face of the front portion of the generator shell, an outlet is formed in the side face of the rear portion of the generator shell, the generator shell is characterized in that the generator shell is composed of an inner shell and an outer shell covering the outer side of the inner shell, the inner shell is in a straight cylinder shape, the outer contour of the outer shell is an arc line similar to the outline of a water drop, the vertical section of the outer shell is wide in front and narrow in back along the arc line from an inlet end to an outlet end, a generator is arranged in the inner cavity of the inner shell close to the inlet end, and the generator is a vertically arranged cylinder body which is along the diameter direction of the circular section of the inner shell of the generator and is fixedly connected to the inner shell at two ends; the generator shell is fixed with a supporting pipe which is vertically arranged above the generator shell, an inserted steel pipe is arranged in the supporting pipe, the inserted steel pipe extends to the inner cavity of the inner shell, and the inserted steel pipe is positioned behind the generator body opposite to the inlet end of the generator shell.

2. The plug-in vortex shedding flowmeter according to claim 1, wherein the plug-in steel pipe is composed of a lower connecting rod, a connecting pipe and an upper connecting rod which are concentric with each other, the upper connecting rod is inserted into a top port of the connecting pipe, the upper connecting rod is hermetically connected with the connecting pipe, the lower connecting rod is inserted into the connecting pipe and extends to be close to the upper connecting rod, and an interface of the lower connecting rod and the connecting pipe is welded and sealed; the lower connecting rod and the upper connecting rod are communicated through the central through hole, the outer diameter of the lower connecting rod is smaller than the inner diameter of the connecting pipe, and rubber is filled in a gap between the connecting pipe and the lower connecting rod.

3. The vortex shedding flowmeter according to claim 2, wherein a ring of protruding rings are provided on the outer wall of the lower connecting rod near the upper end, and a counter bore for receiving the protruding rings is provided on the inner wall of the upper end of the connecting rod, and the diameter of the counter bore is larger than that of the protruding rings.

4. The vortex shedding inserted vortex shedding flowmeter of claim 1, wherein the outlet end of the inner housing is provided with a flared section.

5. The vortex shedding flowmeter of claim 1, wherein the inner housing is welded to the outer housing.

6. The vortex shedding inserted vortex shedding flowmeter according to claim 1, wherein the shedder has an inverted trapezoidal horizontal cross section.