CN211527499U

CN211527499U - Circular wedge flowmeter

Info

Publication number: CN211527499U
Application number: CN202020331775.8U
Authority: CN
Inventors: 卢超; 杨婷; 朱杰; 其他发明人请求不公开姓名
Original assignee: Edgar Fluid Control Shanghai Co ltd
Current assignee: Edgar Fluid Control Shanghai Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-09-18
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a round wedge flowmeter. The utility model discloses an upper reaches flanged straight tube, low reaches flanged straight tube and throttle, the throttle setting between upper reaches flanged straight tube and low reaches flanged straight tube, upper reaches flanged straight tube and low reaches flanged straight tube all insert the industrial field pipeline through respective flange, are equipped with the first pressure pipe of getting on the upper reaches flanged straight tube, are equipped with the second on the low reaches flanged straight tube and get the pressure pipe. The section of the throttling device perpendicular to the incoming flow direction is annular, and the section parallel to the incoming flow direction is an arc surface. The utility model discloses can reduce wearing and tearing and vortex's formation, reduce loss of pressure, application scope is wide, is favorable to promoting and popularizing.

Description

Circular wedge flowmeter

Technical Field

The utility model belongs to the technical field of the flowmeter, concretely relates to round wedge flowmeter.

Background

As the most traditional flowmeter, the differential pressure type flowmeter is most widely applied to the field of industrial flow measurement, the types of the flowmeter are various, but the performance of the flowmeter is generally single, the current working condition is complex, particularly in the occasions where dirt is thick and easy to wear, the working condition is severe, and few flowmeters can meet the use requirement.

Aiming at complex working conditions, the traditional orifice plate flowmeter and the wedge-type flowmeter are mainly adopted at present. The orifice plate flowmeter orifice fitting is extremely easy to be worn and torn, and dirty media accumulation is extremely easy to generate around the orifice fitting, bidirectional flow cannot be measured due to left-right asymmetry of the orifice plate flowmeter orifice fitting, and the front and rear straight pipe sections of the orifice plate flowmeter are high in demand. The wedge point of the wedge-type flowmeter is easy to wear, and the measurement precision is influenced after the wedge-type flowmeter is used for a period of time. The wedge-type flowmeter belongs to eccentric throttling, is extremely easy to wear a downstream pipeline, and often has the condition of pipeline abrasion in practical application. In application occasions such as chilled water and the like, a plurality of groups of redundant pressure tapping are needed, and three groups of pressure tapping differential pressure values of the wedge-type flowmeter are unequal, so that three groups of redundant pressure tapping cannot be realized.

Disclosure of Invention

An object of the utility model is to provide a circular wedge flowmeter, its structural design is simple reasonable, and convenient operation makes things convenient for the dismouting to change the throttling element.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model discloses an upper reaches flanged straight tube, low reaches flanged straight tube and throttle, the throttle setting between upper reaches flanged straight tube and low reaches flanged straight tube, upper reaches flanged straight tube and low reaches flanged straight tube all insert the industrial field pipeline through respective flange, are equipped with the first pressure pipe of getting on the upper reaches flanged straight tube, are equipped with the second on the low reaches flanged straight tube and get the pressure pipe.

The section of the throttling element perpendicular to the incoming flow direction is annular, and the section parallel to the incoming flow direction is an arc surface.

Furthermore, the corresponding angles of the cambered surfaces at the inlet and the outlet of the throttling element are both 90 degrees.

Furthermore, the first pressure sampling pipe and the second pressure sampling pipe are symmetrically arranged on two sides of the throttling element.

Furthermore, the first pressure sampling pipe and the second pressure sampling pipe are both provided with pressure sampling flanges.

Furthermore, a redundant pressure sampling pipe is arranged on the upstream straight pipe with the flange or the downstream straight pipe with the flange.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the section of the throttling element is circular, and the inlet and the outlet are provided with 90-degree arc surfaces, so that measurement distortion caused by accumulation of dirty media at upstream and downstream is prevented.

2. And a flange pressure tapping mode is adopted, so that the influence of the blockage of a dirty medium at the pressure tapping pipe position on the measurement precision and the repeatability can be prevented.

3. The inlet of the throttle part with a 90-degree arc surface is contracted, so that the flow resistance can be reduced, the outlet is expanded, the generation of vortex is reduced, and the measurement repeatability and accuracy are improved.

4. The throttle is symmetrical up and down stream, and the position of the pressure taking port on the up and down stream is symmetrical to the center of the throttle, so that the bidirectional flow can be measured.

5. The 90-degree cambered surface incident flow surface of the throttling element can reduce the shearing force generated by fluid flow, reduce abrasion and fluid scouring and prolong the service life, and particularly has outstanding effect on the occasion of measuring dirty granular fluid.

6. The throttling element belongs to central throttling and can adopt a redundant pressure taking mode of more than 3 groups.

Drawings

FIG. 1 is a schematic view of the partial cross-sectional structure of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a top half sectional view of the present invention;

FIG. 4 is a perspective view of a partial cross-section of the inventive belt;

FIG. 5 is a comparison graph of redundant pressure measurements for a circular wedge flow meter and a wedge flow meter;

in the figure: 1 flange, 2 upper reaches flanged straight tubes, 3 first pressure pipes, 4 pressure pipes, 5 throttle, 6 lower reaches flanged straight tubes, 7 second pressure pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an upper reaches flanged straight tube, low reaches flanged straight tube, throttling element. And the upstream straight pipe with the flange and the downstream straight pipe with the flange are welded with the throttling element. The upstream flanged straight pipe is provided with a first pressure sampling pipe, and the downstream flanged straight pipe is provided with a second pressure sampling pipe. The center of the throttling element is provided with a throttling hole, the section of the throttling element is in a circular ring shape, the inner circle of the circular ring shape is the throttling hole, and the upstream inlet angle and the outlet angle of the throttling element are the same.

Example (b): the circular wedge flowmeter shown in fig. 1, 2, 3 and 4 comprises an upstream flanged straight pipe 2, a downstream flanged straight pipe 6 and a throttling piece 5, wherein the upstream flanged straight pipe 2 and the downstream flanged straight pipe 6 are welded with a connecting flange 1, and the connecting flange 1 is conveniently connected with a field pipeline. The upstream flanged straight pipe 2 is provided with a first pressure sampling pipe 3, and the downstream flanged straight pipe 6 is provided with a second pressure sampling pipe 7. And the first pressure taking pipe 3 and the second pressure taking pipe 7 are welded with the pressure taking flange. And a flange pressure taking mode is adopted, so that the pressure taking is stable, and the pressure taking pipe can be prevented from being blocked by dirty media.

As shown in fig. 2 and 3, a circular hole is formed in the middle of the throttling element 5, and is a throttling hole; the section of the throttling element 5 perpendicular to the incoming flow direction is in a circular ring shape. The orifice is symmetrical so that bi-directional flow can be measured. Then, from the perspective of being parallel to the incoming flow direction, the inlet is a 90-degree arc surface, the outlet is also a 90-degree arc surface, and the inlet and the outlet form a semicircle, namely, the wedge block is a semicylinder (also can be a partial cylinder), called a circular wedge, and is arranged on the periphery of the pipeline; can prevent the accumulation of dirty impurities on the upstream and downstream of the throttling element and play a role in resisting dirt.

Additionally the utility model discloses can also arrange redundancy and get and press the pipe, because the symmetry of structure for the pressure differential pressure that the redundancy was got and is pressed the pipe and first pressure pipe or the second is got and is pressed the pipe and have the uniformity, and ordinary wedge flowmeter just can't accomplish this a bit, see figure 5.

The utility model discloses use the round wedge structure, when obtaining stable differential pressure value, greatly reduced the installation demand to the straight pipeline section, the symmetry can realize two-way measurement around the round wedge flowmeter structure, central symmetry can realize that multiunit redundancy is got the pressure mode, constructional device upper reaches circular arc entry angle can prevent that dirty impurity from piling up in the throttling element upper reaches, and the incident flow face is the circular arc curved surface, can adjust the flow field and can reduce impact and the corruption of fluid to the throttling element, increase the problem that proposes in its corrosion resistance and life in order to solve above-mentioned background art.

The utility model discloses a theory of operation: during the use, will the utility model discloses a flange 1 links to each other with the site pipeline, and convenient the dismouting of being convenient for of connection. And the upstream and downstream pressures of the throttling element 5 are obtained through the first pressure obtaining pipe 3 and the second pressure obtaining pipe 7, so that a differential pressure value is obtained. The cross section of the orifice 5 in the direction of flow is semicircular, and bidirectional flow can be measured. 90 degrees cambered surfaces in entry, export 90 degrees cambered surfaces can prevent that dirty impurity from piling up in throttle spare upper and lower streams, play resistant dirty effect. The 90-degree cambered surface incident flow surface can reduce the shearing force generated by fluid flow, reduce abrasion and fluid scouring and prolong the service life, and particularly has outstanding effect on dirty particle-carrying fluid measurement occasions. The device structural design is simple reasonable, convenient operation, the dismouting of being convenient for, when obtaining stable differential pressure value, greatly reduced the installation demand to the straight tube section, the safety and stability, application scope is wide, is favorable to promoting and popularizing.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a circular wedge flowmeter, includes upper reaches flanged straight tube (2), low reaches flanged straight tube (6) and throttle (5), throttle (5) set up in upper reaches between flanged straight tube (2) in low reaches flanged straight tube (6), its characterized in that:

the upstream flanged straight pipe (2) and the downstream flanged straight pipe (6) are connected to an industrial field pipeline through respective flanges (1), a first pressure sampling pipe (3) is arranged on the upstream flanged straight pipe (2), and a second pressure sampling pipe (7) is arranged on the downstream flanged straight pipe (6);

the section of the throttling element (5) perpendicular to the incoming flow direction is circular, and the section parallel to the incoming flow direction is a circular arc surface.

2. A circular wedge flow meter according to claim 1, wherein: the corresponding angles of the cambered surfaces at the inlet and the outlet of the throttling element are both 90 degrees.

3. A circular wedge flow meter according to claim 1, wherein: the first pressure sampling pipe (3) and the second pressure sampling pipe (7) are symmetrically arranged on two sides of the throttling piece (5).

4. A circular wedge flow meter according to any of claims 1 to 3, wherein: the first pressure sampling pipe (3) and the second pressure sampling pipe (7) are provided with pressure sampling flanges.

5. A circular wedge flow meter according to claim 1, wherein: and the upstream straight pipe (2) with the flange or the downstream straight pipe (6) with the flange is also provided with a redundant pressure sampling pipe.