CN113654611A

CN113654611A - Combined water meter water filtering net

Info

Publication number: CN113654611A
Application number: CN202110979014.2A
Authority: CN
Inventors: 朱海滢; 陈富光; 蒋彥华; 凌玲; 王天垚; 乌骏
Original assignee: Ningbo Water Meter Group Co Ltd
Current assignee: Ningbo Water Meter Group Co Ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2021-11-16
Anticipated expiration: 2041-08-24
Also published as: CN113654611B

Abstract

The invention discloses a combined water meter water filter screen, which belongs to the field of water filter screens and comprises a frame, a blade water filter screen and a pore plate water filter screen, wherein the blade water filter screen comprises a plurality of blade main bodies and a middle hole, the middle hole is positioned at the centroid of the blade water filter screen, each blade main body is positioned at one side of the pore plate water filter screen and is parallel to the pore plate water filter screen, and the tail end of each blade main body extends to the middle hole; the orifice plate water strainer includes the plate body and crosses the water hole, crosses the water hole and sets up in the plate body, and the quantity of crossing the water hole is a plurality of, and a plurality of diameters of crossing the water hole are different, from plate body edge to plate body center, cross the diameter crescent in water hole, and thick rectification, orifice plate water strainer are done to this application blade water strainer, are fine rectification, to the higher water gauge of rectification requirement, can be under keeping better flow characteristic, and effectual reduction water gauge's loss of pressure under the prerequisite that does not change water gauge inner structure.

Description

Combined water meter water filtering net

Technical Field

The invention relates to a water filter screen, in particular to a combined water meter water filter screen.

Background

In water meter application, the water filter screen is an important rectifying device in flow measurement, and the structure of the water filter screen is directly related to the development degree of a flow field in a flow meter measurement area in the water meter, so that the measurement accuracy is influenced. The flow characteristic of the existing water meter is unstable and the pressure loss is high.

Disclosure of Invention

In order to overcome the disadvantages of the prior art, an object of the present invention is to provide a water filtering net for a combined water meter, which effectively reduces the pressure loss of the water meter while maintaining the good flow characteristics.

One of the purposes of the invention is realized by adopting the following technical scheme:

a combined water meter water filter screen comprises a frame, a blade water filter screen and a pore plate water filter screen, wherein the blade water filter screen comprises a plurality of blade main bodies and middle holes, the middle holes are positioned at the centroid of the blade water filter screen, each blade main body is positioned on one side of the pore plate water filter screen and is parallel to the pore plate water filter screen, and the tail end of each blade main body extends to the middle holes; the orifice plate water strainer includes the plate body and crosses the water hole, cross the water hole set up in the plate body, the quantity of crossing the water hole is a plurality of, and is a plurality of the diameter of crossing the water hole is different, follows the plate body edge arrives the plate body center, the diameter of crossing the water hole increases gradually.

Further, the blade body is fixed to the plate body.

Further, the blade body end extends from the frame.

Further, a fan-shaped area is formed between two adjacent blade bodies.

Further, the middle hole coincides with one of the water through holes.

Further, the diameters of the water passing holes are three.

Further, the whole diameter of combination formula water gauge strainer is D, three kinds the diameter in water hole is respectively: D1-0.1924D, D2-0.1828D, and D3-0.1522D.

Furthermore, the circle centers of the water holes are located on the centroid and the two pitch circles of the plate body.

Further, the number distribution ratio of the three water passing holes is 1:6: 12.

Furthermore, the diameter of the whole water meter filter screen is D, and the length of the water meter filter screen is 0.124D.

Compared with the prior art, the combined water meter water filter screen comprises a blade water filter screen and a pore plate water filter screen, wherein the blade water filter screen is in a mode of coarse rectification and the pore plate water filter screen is in a mode of fine rectification, so that the pressure loss of the water meter can be effectively reduced under the premise of keeping better flow characteristic and not changing the internal structure of the water meter for the water meter with higher rectification requirement, and the combined water meter water filter screen conforms to the maximum pressure loss regulation under the rated working conditions of a drinking cold water meter and a hot water meter in the national standard.

Drawings

Fig. 1 is a perspective view of a water meter strainer of the present invention;

fig. 2 is a schematic structural view of the water filtering net of the combined water meter of fig. 1;

fig. 3 is a rear view of the water filtering net of the combined water meter of fig. 1;

fig. 4 is a flow chart of the combined water meter strainer of fig. 1 in use;

fig. 5 is a pressure cloud of the combined water meter strainer of fig. 1 in use.

In the figure: 10. a frame; 20. a leaf water filter screen; 21. a middle hole; 22. a blade main body; 30. a perforated plate water strainer; 31. a plate body; 32. and a water through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 to 3 show a combined water meter strainer of the present invention, which includes a frame 10, a blade strainer 20 and a hole plate strainer 30.

The frame 10 is hollow cylindrical. The diameter of the frame 10 is D, and the width of the frame 10 is L ═ 0.124D.

The leaf filter screen 20 is positioned at one side of the orifice filter screen 30. The leaf water filter net 20 includes a plurality of leaf bodies 22 and a central hole 21. Each vane body 22 is fixed to a plate body 31 of the orifice plate water filter net 30 and extends from the frame 10 to the middle orifice 21. The central aperture 21 is circular. The diameter of the central bore 21 is 0.1924D. The angle between two adjacent blade bodies 22 is 60 degrees and forms a sector area. Extension lines of the plurality of blade bodies 22 meet at a point located at the center of the center hole 21.

The orifice plate water screen 30 includes a plate body 31. The plate body 31 has a circular shape, the plate body 31 is installed in the frame 10, and the edge of the plate body 31 is fixedly connected with the frame 10. The plate body 31 is provided with a plurality of water through holes 32. The water passing holes 32 are classified into three types according to the difference in diameter. The diameters of the three water through holes 32 are: D1-0.1924D, D2-0.1828D, and D3-0.1522D. The number distribution ratio of the three water through holes 32 is 1:6: 12. The centers of the water holes 32 are located on the centroid and two pitch circles of the plate body 31. The position of each pitch circle is respectively as follows: d1 ═ 0.46158D, D2 ═ 0.8436D. The diameter of the water through holes 32 is gradually increased from the edge of the plate body 31 to the center of the plate body 31. The most central water passage hole 32 coincides with the central hole 21.

The combined water meter water filter screen comprises a blade water filter screen 20 and a pore plate water filter screen 30, wherein the blade water filter screen 20 is positioned in front of the combined water meter water filter screen, the pore plate water filter screen 30 is positioned behind the combined water meter water filter screen, the blade water filter screen 20 is used for coarse rectification, and the pore plate water filter screen 30 is used for fine rectification.

The flow field simulation calculation is carried out by taking a certain single-flow-beam water meter as a model, the inner diameter D of a pipeline pore plate is 17mm, the inner diameter D1 of a circular hole is 3.27mm, the inner diameter D2 of a circular hole is 3.11mm, the inner diameter D3 of a circular hole is 2.59mm, the inner diameter D1 of a pitch circle is 7.85mm, the inner diameter D2 of a pitch circle is 14.34mm, the length L of a water filter screen of the combined water meter is 2.11mm, and compared with the existing water filter screen, the flow characteristic is obviously better, and the pressure loss is relatively reduced. The velocity flow chart of the water filtering net of the combined water meter is shown in a 4. It can be seen from the velocity flow diagram that the flow velocity is relatively low and the flow line can be stabilized faster after the water flow passes through the combined water filtering net, which shows that the combined water filtering net of the invention can achieve better rectification effect and has smaller pressure loss. The pressure cloud is shown in fig. 5.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the invention, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the invention, which falls into the protection scope of the invention.

Claims

1. A combined water meter water filtering net comprises a frame, and is characterized in that: the combined water meter water filtering net further comprises a blade water filtering net and a pore plate water filtering net, the blade water filtering net comprises a plurality of blade main bodies and middle holes, the middle holes are located at the centroid of the blade water filtering net, each blade main body is located on one side of the pore plate water filtering net and is parallel to the pore plate water filtering net, and the tail end of each blade main body extends to the middle holes; the orifice plate water strainer includes the plate body and crosses the water hole, cross the water hole set up in the plate body, the quantity of crossing the water hole is a plurality of, and is a plurality of the diameter of crossing the water hole is different, follows the plate body edge arrives the plate body center, the diameter of crossing the water hole increases gradually.

2. A modular water meter strainer according to claim 1, wherein: the blade body is fixed on the plate body.

3. A modular water meter strainer according to claim 1, wherein: the blade body end extends from the frame.

4. A modular water meter strainer according to claim 1, wherein: a fan-shaped area is formed between two adjacent blade bodies.

5. A modular water meter strainer according to claim 1, wherein: the middle hole is superposed with one water through hole.

6. A modular water meter strainer according to claim 1, wherein: the diameters of the water through holes are three.

7. A modular water meter strainer according to claim 6, wherein: the integral diameter of the water filtering net of the combined water meter is D, and the diameters of the water passing holes are respectively: D1-0.1924D, D2-0.1828D, and D3-0.1522D.

8. A modular water meter strainer according to claim 6, wherein: the circle centers of the water holes are positioned on the centroid and the two pitch circles of the plate body.

9. A modular water meter strainer according to claim 6, wherein: the number distribution ratio of the three water passing holes is 1:6: 12.

10. A modular water meter strainer according to claim 1, wherein: the integral diameter of the combined water meter water filter screen is D, and the length of the combined water meter water filter screen is L-0.124D.