Pressure non-return and filtering device of water meter and water meter with pressure non-return and filtering device

Abstract

The invention discloses a pressure non-return and filter device of a water meter and the water meter. The pressure non-return and filter device comprises a filter cartridge, a pressure non-return piece and a pressure non-return piece fixing ring, the filter cartridge is provided with an annular part and a grid part extending from one end of the annular part, a concave through hole is formed in the other end of the annular part and is communicated with the inside of the grid part, the pressure non-return piece is positioned in the filter cartridge and performs elastic movable displacement, and the pressure non-return piece fixing ring is provided with a water inlet hole and is fixedly arranged in the annular part; when tap water passes through the water inlet hole, the pressure non-return piece is pushed to move towards the through hole, so that the tap water passes through the filter cartridge; and when the tap water stops flowing, the pressure non-return piece is reset under the action of elastic force to abut against the pressure non-return piece fixing ring and seal the water inlet hole, so that the water leakage condition caused by tiny flow is avoided. Therefore, tap water cannot pass reversely, and the indication of the water meter is not influenced by reverse flow and can be kept stable.

Description

Technical Field

[0001] The invention relates to a water meter, in particular to a pressure check and filtering device applicable to a billing water meter and the water meter thereof. Background Art

[0002] The current billing water meter has always used the power of running water to drive the turbine or blades to rotate, and then the gear set is used to indicate the billing. However, since the running water is inevitably mixed with impurities or debris such as fibers or hair, the impurities or debris such as fibers or hair are easily entangled on the turbine or blade shaft after the water meter has been used for a period of time, thus slowing down the rotation speed and reducing the accuracy of measurement, causing the water company to suffer a loss of revenue.

[0003] In addition, the existing billing water meters do not have a mechanism or function to prevent reverse rotation in the transmission mechanism such as turbines or blades. Therefore, when the water supply on the upper floors is stopped, the remaining water in the water pipe will flow to the lower level, causing the water meter indication to reverse or produce unstable rotation, etc., resulting in inaccurate billing. For water users, there is a risk of being overcharged. Therefore, a protest was lodged with the water company that the water meter was inaccurate.

[0004] In view of this, the inventors have devoted themselves to research and applied theories to improve and solve the above-mentioned deficiencies, and have proposed an invention that is reasonably designed and effectively improves the above-mentioned deficiencies. Summary of the invention

[0005] The main purpose of the present invention is to provide a water meter pressure check and filtering device and a water meter thereof, which can meet the requirements of the water company. In addition to having a filter, it can further have a mechanism and function to prevent reversal to improve the accuracy of measurement and billing.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a pressure check and filter device for a water meter, including a filter cartridge, a pressure check piece, and a pressure check piece fixing ring; the filter cartridge has an annular portion, and a mesh portion extending from one end of the annular portion, and a recessed through hole is formed at the other end of the annular portion to connect to the mesh portion, the pressure check piece is located in the filter cartridge for elastic movement, and the pressure check piece fixing ring has a water inlet hole and is fixed in the annular portion; wherein the water inlet hole allows tap water to pass through and pushes the pressure check piece to move toward the through hole, so that the tap water passes through the filter cartridge; and when the tap water stops flowing, the pressure check piece is reset by elastic force to press against the pressure check piece fixing ring and close the water inlet hole to avoid water leakage caused by small flow. In this way, the tap water cannot pass in reverse, and the water meter indication is not affected by the reverse flow and can remain stable.

[0007] In one embodiment of the pressure check and filtering device for a water meter of the present invention, a guide portion is disposed in the mesh portion, and the pressure check member has a guide rod, and the guide rod is sleeved in the guide portion for axial movable displacement.

[0008] In one embodiment of the pressure check and filtration device for a water meter of the present invention, the guide portion is formed by an end of the mesh portion away from the annular portion to form an end portion, so that the guide portion is fixedly mounted on the end portion.

[0009] In one embodiment of the pressure check and filtering device for a water meter of the present invention, at least one rib is provided at the periphery of the guide portion and extends and is fixed to the mesh portion.

[0010] In one embodiment of the pressure check and filtering device for a water meter of the present invention, the pressure check member further has a stop portion for resisting against the fixing ring of the pressure check member, and the guide rod extends from the stop portion.

[0011] In one embodiment of the pressure check and filtering device for a water meter of the present invention, the pressure check piece is provided with an elastic component and the stop portion is pressed against the fixing ring of the pressure check piece.

[0012] In one embodiment of the pressure check and filter device of the water meter of the present invention, a sealing ring is provided on a surface of the stop portion relative to the pressure check fixing ring, and a sealing ring is sleeved on the sealing ring to abut against the water inlet.

[0013] In one embodiment of the pressure check and filtering device of the water meter described above of the present invention, a plurality of engaging portions are further provided on the pressure check member fixing ring, a plurality of engaging holes corresponding to the engaging portions are provided on the annular portion, and the pressure check member fixing ring is fixed in the annular portion by respectively engaging the engaging portions into the engaging holes.

[0014] In one embodiment of the pressure check and filtering device for a water meter of the present invention, the pressure check fixing ring is integrally formed with the annular portion.

[0015] In order to achieve the above-mentioned purpose, the present invention provides a water meter, including a pipe seat body, a water meter body and a transmission unit arranged on the pipe seat body; wherein the pipe seat body further has a water inlet and a water outlet, and the above-mentioned pressure check and filtering device is arranged in the water inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional exploded view of the pressure check and filtering device of the present invention.

[0017] Figure 2 A three-dimensional combined diagram of the pressure check and filtering device of the present invention.

[0018] Figure 3 A schematic cross-sectional view of a pressure check and filtering device according to the present invention.

[0019] Figure 4 A three-dimensional view of the filter cartridge of the present invention from another perspective.

[0020] Figure 5 A three-dimensional exploded view of the water meter of the present invention.

[0021] Figure 6 A three-dimensional composite diagram of the water meter of the present invention.

[0022] Figure 7 A schematic diagram of the use status of the water meter of the present invention; showing the water filling status.

[0023] Figure 8 Schematic diagram of the use state of the water meter of the present invention; showing the reverse water state.

[0024] Wherein, the reference numerals are:

[0025] 1: Pressure check and filter device

[0026] 10: Filter cartridge

[0027] 100: annular part

[0028] 100a: Card hole

[0029] 101: Grid Department

[0030] 101a: Guiding part

[0031] 101b: End

[0032] 101c: Ribs

[0033] 102:Through hole

[0034] 11: Pressure check piece

[0035] 110: Stopper

[0036] 111: Guide rod

[0037] 111a: Elastic component

[0038] 112: Sealing ring

[0039] 112a: Sealing ring

[0040] 12: Pressure check fixing ring

[0041] 120: Water entry hole

[0042] 121: snap-fit ​​part

[0043] 2: Water meter

[0044] 20:tube body

[0045] 200:Water inlet

[0046] 201: Water outlet

[0047] 21: Water meter body

[0048] 22: Transmission unit DETAILED DESCRIPTION

[0049] In order to enable you, the examiner, to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only provided for reference and explanation and are not intended to limit the present invention.

[0050] See also Figure 1 , Figure 2 and Figure 3 , are respectively a three-dimensional exploded view, a three-dimensional combined view and a cross-sectional schematic view of the pressure check and filter device of the present invention. The present invention provides a pressure check and filter device for a water meter and a water meter thereof. The pressure check and filter device 1 is used to be assembled on a water meter 2 (such as Figure 5 and Figure 6 As shown), it includes a filter cartridge 10, a pressure check member 11, and a pressure check member fixing ring 12; wherein:

[0051] The filter cartridge 10 has an annular portion 100 and a mesh portion 101 extending from one end of the annular portion 100, and a recessed through hole 102 is formed at the other end of the annular portion 100 and connected to the mesh portion 101; specifically, the filter cartridge 10 can be formed in one piece by injection molding of a material such as metal or plastic, or can be formed by stamping a metal plate and then bending it into a cylindrical shape and joining it (such as welding). Please refer to Figure 4 As shown, the filter cartridge 10 may be provided with a guide portion 101a in the mesh portion 101, and the guide portion 101a may be formed from an end of the mesh portion 101 away from the annular portion 100 to form an end portion 101b, so that the guide portion 101a is fixed to the end portion 101b by welding or screwing; or, the guide portion 101a may be provided with at least one rib 101c on the periphery thereof and extended to be fixed in the mesh portion 101, that is, Figure 4 shown.

[0052] Please see again Figures 1 to 3As shown, the pressure check member 11 is located in the filter cartridge 10 to be elastically movable in the filter cartridge 10; specifically, the pressure check member 11 has a stop portion 110 and a guide rod 111 extending from the stop portion 110, the guide rod 111 is sleeved in the guide portion 101a and can be axially movable, so that the stop portion 110 can be displaced in the grid portion 101 accordingly, and the pressure check member 11 is provided with an elastic component 111a to press the stop portion 110 against the pressure check member fixing ring 12, and can be used for pushing the pressure check member 11 when tap water passes through and applying force to the elastic component 111a, and when the tap water stops flowing, the elastic component 111a resets the pressure check member 11 with elastic force and presses it against the pressure check member fixing ring 12 again. The elastic component 111a can be a conical compression spring and can be sleeved on the guide rod 111 to generate elastic force changes along its compression direction, so that the opening of the pressure check member 11 can be adjusted. The conical compression spring also has the function of adjusting the rotating flow field.

[0053] The pressure check member fixing ring 12 may be in an annular shape and have a water inlet 120 and a plurality of engaging parts 121 disposed on the annular portion of the pressure check member fixing ring 12, wherein the water inlet 120 is hollow for tap water to pass through, so that the tap water passing through can push the stopper 110 of the pressure check member 11 and allow the stopper 110 to move toward the through hole 102. The annular portion 100 of the filter cartridge 10 is provided with a plurality of engaging holes 100a corresponding to the engaging parts 121, and the pressure check member fixing ring 12 can be respectively engaged in the engaging holes 100a through the engaging parts 121 to fix the pressure check member fixing ring 12 in the annular portion 100. In addition, the pressure check member fixing ring 12 can also be formed integrally with the annular portion 100, or fixed by a C-shaped buckle or the like (not shown), so as to be disposed on the filter cartridge 10.

[0054] Furthermore, a sealing ring 112 is provided on one surface of the stopper 110 of the pressure check member 11 relative to the pressure check member fixing ring 12, and a sealing ring 112a is sleeved on the sealing ring 112. The sealing ring 112a can be an O-ring made of a soft material such as rubber, so that the stopper 110 can be pressed against the pressure check member fixing ring 12 to perform a sealing function (i.e., Figure 3 As shown), the sealing ring 112a can completely block the water inlet to prevent problems such as the remaining water in the high-rise water pipe flowing downward and causing the water meter to indicate reverse.

[0055] Therefore, the present invention can design a reserved pressure check member 11 for assembly during the molding process of the filter cartridge 10, and can be integrally manufactured with a pressure check member fixing ring 12 and other structures required to stop the pressure check member 11. Alternatively, as in the above-mentioned embodiment, after the filter cartridge 10 is molded, the pressure check member 11 and the pressure check member fixing ring 12 can be made into separate independent components and assembled inside the filter cartridge 10 one by one.

[0056] Furthermore, if Figure 5 and Figure 6 As shown, the present invention further provides a water meter 2 having the above-mentioned pressure check and filter device 1, the water meter 2 comprises a pipe seat body 20, a water meter body 21 disposed in the pipe seat body 20, and a transmission unit 22, the water meter body 21 can be a mechanical water meter or an electronic water meter, and the transmission unit 22 is composed of a blade structure such as a turbine, so that when tap water flows, the transmission unit 22 is driven to accumulate the flow rate by the number of its rotations. The pipe seat body 20 has a water inlet 200 and a water outlet 201, and the pressure check and filter device 1 is disposed in the water inlet 200, so that the tap water flowing into the water inlet 200 can first pass through the filter device 1. When tap water flows through the water inlet 120, the power of the tap water flow is greater than the elastic component 111a, which can push the pressure check member 11 open, allowing the tap water to naturally flow into the filter cartridge 10 and be filtered; and when the tap water stops flowing, the elastic force of the elastic component 111a can automatically reset the pressure check member 11, and the reverse flow direction of the tap water will push the pressure check member 11 toward the pressure check member fixing ring 12 to automatically block the water inlet of the water inlet 120, so that the tap water at a high place will not be able to flow, and the transmission unit 22 can automatically stop rotating when there is no water flowing to avoid continuous calculation of the tap water flow rate.

[0057] Therefore, by means of the above-mentioned structural composition, the pressure check and filtering device of the water meter of the present invention and the water meter thereof can be obtained.

[0058] Therefore, the pressure check and filtration device of the water meter and the water meter of the present invention can be made of various metals or plastics, and the pressure check member 11 is assembled inside the filter cartridge 10 to achieve the dual functions of filtering and water return, and the structure is simpler, the cost is lower, and it is easier to assemble on the water meter 2. At the same time, the present invention can also be used to solve the problem of unstable indication such as jumping of water meter digital display due to backflow of tap water when the current water company charges for water use, so as to improve its measurement accuracy and stability, and can build users' trust in the water company and reduce disputes on measurement.

Claims

1. A pressure check and filtering device for a water meter, characterized in that: include: A filter cartridge having an annular portion and a mesh portion extending from one end of the annular portion, and a recessed through hole formed at the other end of the annular portion and connected to the mesh portion; A pressure check member, located in the filter cartridge and movable; and A pressure check fixing ring having a water inlet hole and fixedly disposed in the annular portion; The water inlet hole allows tap water to pass through, pushing the pressure check piece to move toward the through hole, allowing the tap water to pass through the filter cartridge; and when the tap water stops flowing, the pressure check piece is elastically reset to press against the pressure check piece fixing ring and close the water inlet hole.

2. The pressure check and filtering device for a water meter according to claim 1, characterized in that: A guiding part is arranged in the grid part, and the pressure check piece has a guiding rod, and the guiding rod is sleeved in the guiding part to move axially.

3. The pressure check and filtering device for a water meter as claimed in claim 2, characterized in that: The guiding part is formed by an end of the mesh part away from the annular part to form an end portion, so that the guiding part is fixed on the end portion.

4. The pressure check and filtering device for a water meter as claimed in claim 2, characterized in that: The periphery of the guiding portion is provided with at least one rib portion and extends and is fixed to the grid portion.

5. The pressure check and filtering device for a water meter as claimed in claim 2, characterized in that: The pressure check piece also has a stopper portion for resisting against the pressure check piece fixing ring, and the guide rod extends out from the stopper portion.

6. The pressure check and filtering device for a water meter as claimed in claim 5, characterized in that: The pressure check piece is provided with an elastic component which pushes the stop portion toward the pressure check piece fixing ring.

7. The pressure check and filtering device for a water meter as claimed in claim 5, characterized in that: A sealing ring is arranged on a surface of the stopper portion relative to the pressure stopper fixing ring, and a sealing ring is sleeved on the sealing ring so as to abut against the water inlet hole.

8. The pressure check and filtering device for a water meter as claimed in claim 1, characterized in that: The pressure check piece fixing ring is also provided with a plurality of clamping parts, and the annular part is provided with a plurality of clamping holes corresponding to the clamping parts. The pressure check piece fixing ring is fixed in the annular part by clamping each of the clamping parts into each of the clamping holes.

9. The pressure check and filtering device for a water meter according to claim 1, characterized in that: The pressure check member fixing ring is integrally formed with the annular portion.

10. A water meter, characterized in that: It includes a pipe seat body, a water meter body and a transmission unit arranged on the pipe seat body; The pipe seat body further has a water inlet and a water outlet, and a pressure check filter device of the water meter as claimed in any one of claims 1 to 9 is arranged in the water inlet.

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