CN218724438U - Water filtering net for water meter - Google Patents

Abstract

The utility model discloses a water filter screen for a water meter, which comprises a filter screen main body; the filter screen main body is provided with a plurality of water through holes, and the inside of the filter screen main body is communicated with the outside through the water through holes; the aperture of each water through hole is gradually reduced from one end of the water through hole facing the outside to the other end of the water through hole. The utility model discloses a to cross the aperture in water hole and become from its one end to its other end towards the external world and diminish gradually, like this, when outside flowing water strikes in the filter screen main part after through this water hole entering filter screen main part in, the water passing hole plays fine rectification effect to rivers, avoids producing the vortex and avoids arousing rivers turbulent motion, ensures then that the water gauge of the water filter screen that uses this water gauge to have stable measurement performance.

Description

Water filtering net for water meter

Technical Field

The utility model relates to a water gauge field especially relates to a water strainer that water gauge was used.

Background

The water meter is a meter for measuring water flow, and is mostly used for measuring the accumulated flow of water; a water meter for recording the water consumption of running water is installed on a water pipe, when a user discharges water, the water flows through the water meter, and the water meter indicates the passing water quantity through the rotation of a pointer or a character wheel of the water meter.

The water meter generally comprises a water meter shell, a water filter screen arranged in the water meter shell, and an impeller box arranged in the water filter screen; running water passes through the water filter screen and enters the impeller box to impact the impeller to rotate, so that the pointer or character wheel rotates; however, the existing tap water flow is turbulent, so that the metering performance of the water meter is unstable.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a water strainer for a water meter, which can rectify well to stabilize water flow and ensure that the water meter using the water strainer for the water meter has stable metering performance.

The purpose of the utility model is realized by adopting the following technical scheme:

a water strainer for a water meter includes a strainer body; the filter screen main body is provided with a plurality of water passing holes, and the inside of the filter screen main body is communicated with the outside through the water passing holes; the aperture of each water through hole is gradually reduced from one end of the water through hole facing the outside to the other end of the water through hole.

Further, the axial cross section of the water through hole is trapezoidal.

Furthermore, be provided with the mark structure that can supply discernment on the filter screen main part.

Further, the filter screen main body comprises a horizontal bottom plate and an annular side plate formed by extending the horizontal bottom plate upwards in the circumferential direction; and each water through hole is formed in the annular side plate.

Further, the expansion block is arranged outside the filter screen main body and can be compressed when being compressed and restored when the pressure is released.

Further, the expansion block closes the outer bottom surface of the filter screen main body; the expansion block can prevent water flow from flowing to the outer bottom surface of the filter screen main body through the expansion block.

Further, the top surface of inflation piece with the outer bottom surface of filter screen main part offsets to can follow vertical elastic contraction.

Further, the bottom surface of the filter screen main body extends downwards in the circumferential direction to form an annular enclosing plate; the expansion block is arranged in the annular enclosing plate and is tightly matched with the annular enclosing plate; the bottom surface of the expansion block protrudes out of the bottom surface of the annular enclosing plate and is used for compression and abutting of the outer water meter shell.

Further, the expansion block is an EVA block.

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

the utility model discloses a to cross the aperture in water hole and diminish gradually from its one end towards the external world to its other end, like this, externally flow water impact on the filter screen main part after through this water hole get into in the filter screen main part in time, the water hole plays fine rectification effect to rivers, avoids producing the vortex and avoids arousing the turbulent motion of rivers, ensures then that the water gauge of the water strainer that uses this water gauge to have stable measurement performance.

Drawings

Fig. 1 is a schematic structural view of a water filter net for a water meter according to the present invention;

fig. 2 is a sectional view of a water strainer for a water meter according to the present invention;

fig. 3 is a using state diagram of the water filter net for the water meter of the present invention.

In the figure: 10. a filter screen main body; 11. a horizontal floor; 12. an annular side plate; 20. water passing holes; 30. marking the structure; 40. mounting holes; 50. an expansion block; 60. an annular coaming; 71. an external water meter case; 72. an external water meter impeller box.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 3, the present invention discloses a water filter screen for a water meter, which includes a filter screen main body 10; the filter screen main body 10 is provided with a plurality of water through holes 20, and the inside of the filter screen main body 10 is communicated with the outside through the water through holes 20; the aperture of each water through hole 20 gradually becomes smaller from one end thereof facing the outside to the other end thereof; like this, when in the water gauge watchcase with the water strainer that this water gauge was used to the entering of outside rivers, outside flowing water strikes and gets into in filter screen main part 10 through this water hole 20 of crossing after filter screen main part 10, at this moment, it plays fine rectification effect to rivers to cross water hole 20, and is concrete, the pore wall that crosses water hole 20 guides rivers and concentrates a direction with rivers, so, realize the stationary flow, avoid producing the vortex and avoid arousing the turbulent motion of rivers, ensure then that the water gauge of the water strainer that uses this water gauge has stable measurement performance.

It should be noted that the water holes 20 can reduce the kinetic energy loss of the water flow, and can bring a larger driving force, thereby improving the metering accuracy of the water meter using the water filter net for the water meter.

Specifically, the water passing hole 20 of the present embodiment has a trapezoidal axial cross section.

The plurality of water through holes 20 of the present embodiment are uniformly and respectively formed on the strainer body 10, so as to achieve uniform water inlet of the strainer body 10, and further play a role in stabilizing the flow.

Specifically, the plurality of water passing holes 20 are divided into a plurality of groups of filter units; the multiple groups of filtering units are sequentially arranged at equal intervals along the axial direction of the filter screen main body 10; each filtering unit comprises a plurality of water passing holes 20 which are sequentially arranged along the circumferential direction of the filter screen main body 10 at equal intervals; thus, the water holes 20 are formed in the entire surface of the filter screen body 10, and the water is uniformly supplied.

Be provided with the mark structure 30 that can supply discernment on the filter screen main part 10 of this embodiment, like this, for example when adopting the water strainer that external detection device used to this water gauge to carry out the performance detection, can mark the position through discerning this mark structure 30, avoid the filter screen main part 10 to install the inconsistent performance error that brings of mounted position on external detection device, improve the primary qualification rate of production.

The above-mentioned indication structure 30 can be a notch or a dent formed on the filter screen body 10, wherein the dent can be in the shape of triangle, arrow, etc.

The existing impeller box 72 of the external water meter is mostly provided with holes at the side for water flow to enter and impact the impeller, therefore, the filter screen body 10 of the embodiment comprises a horizontal bottom plate 11 and a ring-shaped side plate 12 formed by extending upwards from the circumference of the horizontal bottom plate 11; each water through hole 20 is arranged on the annular side plate 12; thus, water flow uniformly enters from the side of the filter screen body 10 to ensure that the water flow can accurately impact the external water meter impeller through the hole on the side of the external water meter impeller box 72, thereby improving the measurement accuracy of the water meter using the water filter screen for the water meter.

The filter screen further comprises an expansion block 50 arranged outside the filter screen main body 10, wherein the expansion block 50 can be compressed under the expansion pressure of frozen water and can automatically recover after the expansion pressure is relieved; when the expansion block 50 is used, the expansion block 50 is arranged in the outer water meter shell 71 together with the filter screen main body 10, the expansion block 50 occupies the space in the outer water meter shell 71, the volume of water reserved in the outer water meter shell 71 is reduced, when the water is frozen and expands in volume, the expansion block 50 is compressed and contracted to reduce the occupation of the volume in the outer water meter shell 71, the space is then vacated for water supply expansion, the extrusion of an external water meter and the like during water expansion is reduced, and therefore the water meter of the water filter screen for the water meter is prevented from being burst.

When the external water meter impeller box 72 is arranged in the filter screen main body 10, the bottom surface of the filter screen main body 10 is provided with a plurality of mounting holes 40 for the external water meter impeller box 72 to be pivoted, at the moment, the mounting holes 40 enable external water flow to enter the filter screen main body 10 through the mounting holes to impact the bottom surface of the external water meter impeller box 72, disturbance brought to the bottom of the external water meter impeller box 72 by water flow impact can cause the impeller to rotate, and then the metering precision is influenced, and the expansion block 50 of the embodiment seals the outer bottom surface of the filter screen main body 10; the expansion block 50 prevents the flow of water therethrough toward the outer bottom surface of the screen main body 10; in this manner, the impact of the external water flow against the bottom surface of the external water meter impeller case 72 is avoided.

The bottom surface of the filter screen main body 10 of the embodiment extends downwards in the circumferential direction to form an annular enclosing plate 60; the expansion block 50 is arranged in the annular enclosing plate 60 and is tightly matched with the annular enclosing plate 60; thus, the installation of the expansion block 50 is completed; specifically, the bottom surface of the expansion block 50 protrudes from the bottom surface of the annular shroud 60, ensuring that the expansion block 50 can contract under the expansion pressure of freezing water in contact with the outside water.

The expansion block 50 of the present embodiment is disposed on the bottom surface of the screen main body 10 and can be elastically deformed in the vertical direction; the expansion block 50 also serves to compress against the outer water meter housing 71 to urge the screen body 10 against the inside of the outer water meter housing 71, and thus the expansion block 50 also serves to mount the screen body 10, simplifying construction.

Specifically, the expansion block 50 is an EVA block, which can be directly purchased from the market, so that the research and development cost is saved; the EVA block has good resilience and toughness, so that the filter screen main body 10 is well pressed against the outer water meter shell 71; meanwhile, the EVA pad also has good shock absorption characteristics, can play a good role in buffering and resisting shock on the filter screen main body 10, reduces the possibility that the filter screen main body 10 vibrates due to unstable water pressure in the external pipeline and water flow oscillation generated when air exists in the external pipeline, and avoids the self-walking phenomenon of the water meter caused by the self-rotation of an impeller arranged in the filter screen main body 10; moreover, the EVA block is waterproof, and can well prevent water from flowing into the filter screen main body 10 through the EVA block.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (9)

1. A water strainer for a water meter, comprising a strainer body; the filter screen main body is provided with a plurality of water passing holes, and the inside of the filter screen main body is communicated with the outside through the water passing holes; the aperture of each water through hole is gradually reduced from one end of the water through hole facing the outside to the other end of the water through hole.

2. A water filtering net for a water meter as recited in claim 1, wherein said water through holes have a trapezoidal axial cross section.

3. A water filter screen for a water meter as recited in claim 1, wherein said screen body is provided with an identifying indicia structure.

4. A water filtering screen for a water meter as claimed in claim 1, wherein said screen body includes a horizontal bottom plate and an annular side plate formed by said horizontal bottom plate extending circumferentially upward; and each water through hole is formed in the annular side plate.

5. A strainer for a water meter as recited in claim 4, further comprising an expansion block disposed outside said strainer body, said expansion block being compressible under expansion pressures of freezing water and automatically recoverable upon release of said expansion pressures.

6. A water filtering screen for a water meter as recited in claim 5, wherein said expansion block closes an outer bottom surface of said screen body; the expansion block can prevent water flow from flowing to the outer bottom surface of the filter screen main body through the expansion block.

7. A strainer for a water meter as set forth in claim 6, wherein said bottom surface of said strainer body extends circumferentially downwardly to form an annular skirt; the expansion block is arranged in the annular enclosing plate and is tightly matched with the annular enclosing plate; the bottom surface of the expansion block protrudes out of the bottom surface of the annular enclosing plate.

8. A water filtering screen for a water meter as claimed in claim 5, wherein the top surface of said expansion block abuts against the outer bottom surface of said screen body and is elastically deformable in a vertical direction; the expansion block is also used for compressing and abutting with the shell of the external water meter so as to enable the filter screen main body to abut against the shell of the external water meter.

9. A water filter screen for a water meter as claimed in any one of claims 5 to 8, wherein said expansion block is an EVA block.

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