Positive displacement water meter with replaceable metering module

Abstract

The application relates to the technical field of water meters, in particular to a volumetric water meter with replaceable metering modules, which comprises a first filter, a second filter and a vibrating column, the first filter and the second filter are provided with a filter screen cavity, the first filter and the second filter are both provided with filter holes, the aperture of the filter holes of the first filter is larger than that of the second filter, the filter shell is further provided with an impurity storage cavity, the impurity storage cavity is communicated with the filter screen cavity, the second filter is rotatably and liftable arranged in the filter cavity, and the vibrating column is located on the side of the second filter away from the first filter; when the second filter moves up and down, the second filter collides with the first filter or the vibrating column; the second filter is rotated to use centrifugal force to throw the retained impurities to the outside of the impurity filter cavity; the second filter is moved up and down and selectively collides with the first filter or the vibrating column to shake down the impurities in a vibrating mode, and the advantages of self-cleaning double filter screens are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water meters, and more particularly to a volumetric water meter with replaceable metering module. BACKGROUND

[0002] A volumetric water meter is a kind of instrument that realizes flow accumulation by metering the fixed volume of water in a closed cavity.

[0003] Patent document (CN114777869B) discloses a water meter with interchangeable metering module, which comprises a meter shell assembly and a metering assembly. The meter shell assembly comprises a lower meter shell, an upper meter shell and a clamp. The middle section of the lower meter shell is connected with the upper meter shell through the clamp. The lower meter shell has a water inlet, a water outlet and an intermediate chamber. The intermediate chamber has a vertical cylinder part with an inner cylinder cavity. The chamber between the intermediate chamber and the vertical cylinder part is an outer cylinder cavity. The water inlet is in communication with the inner cylinder cavity, and the water outlet is in communication with the outer cylinder cavity. The upper meter shell has a metering cavity for accommodating the metering assembly. After the water flow enters the water inlet, it flows through the inner cylinder cavity, enters the metering cavity and is metered, and then is discharged from the water outlet along the outer cylinder cavity. Figure 1 As can be seen from the description and drawings of the patent document, the metering assembly comprises a filter screen, which is arranged at the cavity opening of the inner cylinder cavity. The filter screen filters the silt and rust in the water flow. However, after long-term use, the silt and rust are retained on the filter screen, causing partial or even complete blockage of the filter screen, resulting in a small or even zero water flow.

[0004] Therefore, there is a need to provide a volumetric water meter with replaceable metering module and self-cleaning double filter screen. SUMMARY

[0005] The application aims to provide a volumetric water meter with replaceable metering module, comprising a meter shell assembly and a metering assembly, the meter shell assembly comprises a lower meter shell and an upper meter shell, the lower meter shell has a middle chamber, the middle chamber has a vertical cylinder part, the vertical cylinder part has an inner cylinder cavity, the chamber between the middle chamber and the vertical cylinder part is an outer cylinder cavity, the upper meter shell has a metering cavity for accommodating the metering assembly, the metering assembly comprises a filter shell, a metering shell and a piston, the metering shell has a movable cavity, the bottom wall of the movable cavity has an inlet and an outlet, the piston is reciprocally arranged in the movable cavity between the inlet and the outlet, the filter shell has a filter cavity, the filter shell extends into the inner cylinder cavity, and the two ends of the filter cavity are communicated with the inner cylinder cavity and the inlet respectively, and the outlet is communicated with the outer cylinder cavity; the volumetric water meter with replaceable metering module further comprises a filter assembly arranged in the filter cavity, the filter assembly comprises a first filter, a second filter and a vibrating column, the first filter and the second filter have a filter screen cavity therebetween, the first filter and the second filter each have a plurality of filter holes, the aperture of the filter holes of the first filter is larger than that of the second filter, the filter shell further has a plurality of impurity storage cavities communicated with the filter screen cavity, the second filter is rotatably and liftable arranged in the filter cavity, and the vibrating column is located on the side of the second filter away from the first filter; when the second filter moves up and down, the second filter collides with the first filter or the vibrating column, the second filter is rotated to use centrifugal force to throw the impurities retained on the second filter to the outside closer to the impurity filter cavity, and the second filter is lifted and lowered to selectively collide with the first filter or the vibrating column to shake down the impurities retained on the second filter or the first filter in a vibrating manner, so as to achieve the purpose of self-cleaning double filter screens.

[0006] Another purpose of the application is to provide a volumetric water meter with replaceable metering module, wherein the filter assembly comprises a first shaft body, the first shaft body is rotatably mounted at one end of the metering shell close to the filter shell, the side wall of the first shaft body is provided with a first blade, the first shaft body penetrates the center of the second filter and is fixedly connected with the second filter, and the first blade is located in the filter screen cavity to realize the circumferential rotation of the second filter.

[0007] In order to achieve at least one of the above purposes, the application provides a volumetric water meter with replaceable metering module, comprising a meter shell assembly and a metering assembly, the meter shell assembly comprises a lower meter shell and an upper meter shell, the lower meter shell has a middle chamber, the middle chamber has a vertical cylinder part, the vertical cylinder part has an inner cylinder cavity, the chamber between the middle chamber and the vertical cylinder part is an outer cylinder cavity, the upper meter shell has a metering cavity for accommodating the metering assembly, wherein:

[0008] The metering assembly comprises a filter shell, a metering shell and a piston, the metering shell has a movable cavity, the bottom wall of the movable cavity has a flow inlet and a flow outlet, the piston is reciprocally movably arranged in the movable cavity between the flow inlet and the flow outlet, the filter shell has a filter cavity, the filter shell extends into the inner cylinder cavity, and the two ends of the filter cavity are respectively communicated with the inner cylinder cavity and the flow inlet, and the flow outlet is communicated with the outer cylinder cavity;

[0009] The volumetric water meter with replaceable metering module further comprises a filter assembly arranged in the filter cavity, the filter assembly comprises a first filter piece, a second filter piece and a vibrating column, the first filter piece and the second filter piece have a filter screen cavity therebetween, the first filter piece and the second filter piece each have a plurality of filter holes, the filter holes of the first filter piece have a larger aperture than the filter holes of the second filter piece, the filter shell further has a plurality of impurity storage cavities, the impurity storage cavities are communicated with the filter screen cavity, the second filter piece is rotatably and liftably arranged in the filter cavity, and the vibrating column is located on the side of the second filter piece away from the first filter piece, when the second filter piece moves up and down, the second filter piece collides with the first filter piece or the vibrating column.

[0010] In one or more embodiments of the present application, the filter assembly comprises a first shaft body, the first shaft body is rotatably mounted on one end of the metering shell close to the filter shell, a side wall of the first shaft body is provided with a first vane, the first shaft body penetrates the center of the second filter piece and is fixedly connected with the second filter piece, and the first vane is located in the filter screen cavity.

[0011] In one or more embodiments of the present application, the filter assembly further comprises a second shaft body, the second shaft body is rotatably arranged on the lower table shell, one end of the first shaft body away from the metering shell penetrates the second filter piece, the second shaft body is provided with a second vane and a cam portion, and a side wall of the cam portion abuts against the second shaft body.

[0012] In one or more embodiments of the present application, the vibrating column is arranged on one end of the metering shell close to the filter shell, the center of the first filter piece has a tapered hole, one end of the first shaft body away from the metering shell has a tapered surface and a contact portion, when the second filter piece moves upward by a predetermined distance, the vibrating column contacts the second filter piece, when the second filter piece moves downward by a predetermined distance, the tapered surface contacts the hole wall of the tapered hole, and the contact portion penetrates the tapered hole.

[0013] In one or more embodiments of the present application, the metering shell has a guide post near one end of the filtering shell, a magnetic disk is rotatably mounted on the guide post, the first shaft body has a recess hole at one end away from the second shaft body, the guide post extends into the recess hole, the side surface of the guide post is in contact with the hole wall of the recess hole, and a magnet is arranged on the bottom wall of the recess hole, the magnet is spaced apart from the magnetic disk by a predetermined distance, and the magnet has opposite magnetic properties to the magnetic disk.

[0014] In one or more embodiments of the present application, each impurity storage cavity includes a first chamber and a second chamber, one end of the first chamber is in communication with the filter screen cavity, and two ends of the second chamber are in communication with the first chamber and the filtering cavity near one end of the metering shell, respectively. The filtering assembly further includes an impurity collection assembly, the impurity collection assembly includes a sliding ring, a first baffle, an elastic member, a filter ring, and a filter screen, the filter screen is arranged in the second chamber, the sliding ring is slidingly arranged in the first chamber, the sliding ring has a first central hole, the first baffle is fixedly mounted in the first chamber, the elastic member is connected to the sliding ring and the filter ring at two ends, respectively, the filter ring has a second central hole, the hole wall of the second central hole has a plurality of bristles, and when the sliding ring slides by a predetermined distance, the first baffle closes or opens the first central hole away from the filter ring.

[0015] In one or more embodiments of the present application, the second filter member is in a cylindrical shape, the filtering shell has a first annular groove, the cylinder wall of the second filter member extends into the first annular groove, the cylinder wall of the second filter member has a second annular groove, and a lifting ring is slidingly arranged in the second annular groove.

[0016] In one or more embodiments of the present application, the second shaft body includes a long shaft section, a short shaft section, and a stabilizing section, the second blade is arranged on the short shaft section, the cam portion is arranged on the long shaft section, the short shaft section has a hidden hole, one end of the stabilizing section is arranged in the hidden hole and connected to the short shaft section, the short shaft section rotatably penetrates the vertical cylinder portion, the long shaft section is arranged in the inner cylinder cavity, one end of the long shaft section is connected to the short shaft section, the other end of the long shaft section is rotatably mounted on the cavity wall of the inner cylinder cavity, and the other end of the stabilizing section is connected to the cavity wall of the outer cylinder cavity.

[0017] In one or more embodiments of the present application, the metering assembly further comprises an upper cover, a rotating shaft and a second baffle, the second baffle is fixedly installed in the movable cavity, the movable cavity has a first cylinder, the first cylinder is provided with a convex column, the inlet and the outlet are respectively located on two sides of the second baffle, the piston is slidable along the second baffle, the upper cover closes the cavity opening of the movable cavity, the middle section of the piston has an extension column, two ends of the extension column are respectively abutted with the rotating shaft and the convex column, when the piston makes a circumferential movement around the convex column, the extension column drives the rotating shaft to rotate circumferentially.

[0018] In the present application, the volumetric water meter with replaceable metering module comprises a filter assembly, the filter assembly comprises a first filter piece, a second filter piece and a vibrating column, the first filter piece and the second filter piece have a filter screen cavity therebetween, the first filter piece and the second filter piece are both provided with a plurality of filter holes, the pore size of the filter holes of the first filter piece is larger than that of the second filter piece, the filter shell is further provided with a plurality of impurity storage cavities, the impurity storage cavities are communicated with the filter screen cavity, the second filter piece is rotatably and liftable installed in the filter cavity, the vibrating column is located on the side of the second filter piece away from the first filter piece, when the second filter piece moves up and down, the second filter piece collides with the first filter piece or the vibrating column, by rotating the second filter piece, the centrifugal force is used to throw the impurities retained on the second filter piece to the outside closer to the impurity filter cavity, by making the second filter piece move up and down and selectively collide with the first filter piece or the vibrating column, the impurities retained on the second filter piece or the first filter piece are shaken down in a vibrating manner, so as to achieve the purpose of self-cleaning double filter screens. BRIEF DESCRIPTION OF DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;

[0021] Figure 2 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;

[0022] Figure 3 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application; Figure 1 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;

[0023] Figure 4 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application; Figure 3 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;

[0024] Figure 5 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application; Figure 3 Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;

[0025] Fig. 1 shows a sectional view of a volumetric water meter with replaceable metering module according to the present application;Figure 6 FIG. 3 illustrates a configuration diagram of a second shaft body according to another embodiment. DETAILED DESCRIPTION

[0026] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used to enable a clear and consistent understanding of the application. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purpose only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

[0027] It is to be understood that the term "one", "a", or "another" shall not be construed to mean "at least one", or "one or more", unless expressly indicated otherwise. The term "another" is generally used to indicate "at least one" or "one or more".

[0028] Although ordinal numbers such as "first", "second", etc., will be used to describe various components, the components are not limited by the ordinal numbers. The ordinal numbers are used merely to distinguish a component from another. For example, a first component can be referred to as a second component, and likewise, a second component can also be referred to as a first component without departing from the teachings of the present inventive concept. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0029] The terms used herein are merely used to describe various embodiments and are not intended to limit the application. As used herein, the singular form is intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has", when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or combinations thereof.

[0030] A volumetric water meter with replaceable metering module,

[0031] Reference Figures 1 to 6 A volumetric water meter with replaceable metering module according to a preferred embodiment of the present application comprises a meter housing assembly 10 and a metering assembly 20.

[0032] In particular, as Figure 1As shown, the watch case assembly 10 comprises a lower watch case 101, an upper watch case 102 and a clamp 103, the middle section of the lower watch case 101 is connected with the upper watch case 102 through the clamp 103, the lower watch case 101 has a water inlet 1011, a water outlet 1012 and an intermediate chamber 1013, the intermediate chamber 1013 has a vertical cylinder part 1014, the vertical cylinder part 1014 has an inner cylinder cavity 1015, the chamber between the intermediate chamber 1013 and the vertical cylinder part 1014 is an outer cylinder cavity 1016, the water inlet 1011 communicates with the inner cylinder cavity 1015, the water outlet 1012 communicates with the outer cylinder cavity 1016, the upper watch case 102 has a metering cavity 1021 for accommodating the metering assembly 20.

[0033] In addition, as shown in the drawings, Figures 1 to 3 As shown, the metering assembly 20 comprises a filter case 201, a metering case 202 and a piston 203, the metering case 202 and the filter case 201 are preferably detachably connected, the metering case 202 has a movable cavity 2021, the bottom wall of the movable cavity 2021 has a flow inlet 2022 and a flow outlet 2023, the piston 203 is reciprocally movably arranged in the movable cavity 2021 between the flow inlet 2022 and the flow outlet 2023, the filter case 201 has a filter cavity 2011, the filter case 201 extends into the inner cylinder cavity 1015, and the two ends of the filter cavity 2011 respectively communicate with the inner cylinder cavity 1015 and the flow inlet 2022, the flow outlet 2023 communicates with the outer cylinder cavity 1016.

[0034] Specifically, in order to realize the reciprocating movement of the piston 203, as shown in the drawings, Figures 1 to 3As shown, the movable cavity 2021 has a vertically arranged first cylinder with a cylinder cavity in which a convex column 2024 is arranged at the center. The metering assembly 20 further comprises an upper cover 204, a rotating shaft 205 and a second baffle 206 which is fixedly arranged in the movable cavity 2021. The flow inlet 2022 and the flow outlet 2023 are respectively arranged on two sides of the second baffle 206. The piston 203 is slidable along the second baffle 206. The piston 203 has a metering concave cavity. The middle section of the piston 203 has an extension column 2031 which extends into the cylinder cavity and is in contact with the convex column 2024. When water flows into the metering concave cavity from the flow inlet 2022, the piston 203 makes a circumferential movement along the convex column 2024 through the extension column 2031 and a sliding movement along the second baffle 206, so that the piston 203 makes an adaptive rotation while making a circumferential movement around the convex column 2024. In the whole process, the cavity wall of the metering concave cavity is tangent to the first cylinder. In addition, the upper cover 204 closes the cavity opening of the movable cavity 2021. The upper cover 204 has a second cylinder which is vertically opposite to the first cylinder. The upper cover 204 abuts against the middle section of the piston 203. The rotating shaft 205 is provided with a magnet. The other end of the extension column 2031 abuts against the rotating shaft 205, so that when the piston 203 makes a circumferential movement around the convex column 2024, the rotating shaft 205 makes a circumferential rotation and outputs a magnetic signal to the counting module 30 above.

[0035] Further, as shown in Figure 3 The replaceable metering module volumetric water meter further comprises a filtering assembly 40 which is arranged in the filtering cavity 2011. The filtering assembly 40 comprises a first filtering piece 401, a second filtering piece 402 and a vibrating column 403. The first filtering piece 401 and the second filtering piece 402 have a filter screen cavity 4011 therebetween. The first filtering piece 401 and the second filtering piece 402 are both provided with a plurality of filtering holes. The aperture of the filtering holes of the first filtering piece 401 is larger than that of the second filtering piece 402. The filtering shell 201 further has a plurality of impurity storage cavities 2012 which are communicated with the filter screen cavity 4011. The second filtering piece 402 is rotatable and liftable arranged in the filtering cavity 2011. The vibrating column 403 is arranged on the side of the second filtering piece 402 which is away from the first filtering piece 401. When the second filtering piece 402 moves up and down, the second filtering piece 402 collides with the first filtering piece 401 or the vibrating column 403.

[0036] It should be noted that the first filter 401 filters the impurities with large particle size in the water flow, and the second filter 402 filters the impurities with small particle size in the water flow. Since the filter hole diameter of the second filter 402 is small, by arranging the first filter 401, the impurities with large particle size are effectively prevented from directly contacting the first filter 401 and being retained on the second filter 402. In addition, by rotatingly installing the second filter 402, when the second filter 402 rotates circumferentially, a centrifugal force is generated, and the impurities on the second filter 402 are thrown to the outer edge, so as to be close to the impurity storage cavity 2012, and the impurities are not easily adhered to the second filter 402. In addition, by allowing the second filter 402 to move up and down, when the second filter 402 moves upward, the impurities placed on the second filter 402 are easily shaken down by colliding with the vibration column 403, and when the second filter 402 moves downward, the impurities placed on the first filter 401 are shaken down by colliding with the first filter 401. Compared with the prior art, the present application has the advantages of self-cleaning double filter screens.

[0037] Further, in order to realize the circumferential rotation of the second filter 402, as shown in Figure 3 The filter assembly 40 comprises a first shaft body 404 rotatably installed at one end of the metering shell 202 close to the filter shell 201. The side wall of the first shaft body 404 is provided with a first blade 4041. The first shaft body 404 penetrates the center of the second filter 402 and is fixedly connected with the second filter 402. The first blade 4041 is located in the filter screen cavity 4011.

[0038] It should be noted that when the water flow passes through the first filter 401 and flows into the filter screen cavity 4011, the water flow impacts the first blade 4041, and the first blade 4041 is subjected to a lateral force and drives the first shaft body 404 to rotate circumferentially. The first blade 4041 is preferably a spiral wing blade. Since the first shaft body 404 is fixedly connected with the second filter 402, the second filter 402 rotates circumferentially.

[0039] Further, in order to move the second filter 402 upward, as shown in Figure 3 The filter assembly 40 further comprises a second shaft body 405 rotatably arranged on the lower table shell 101. The end of the first shaft body 404 away from the metering shell 202 penetrates the second filter 402. The second shaft body 405 is provided with a second blade 4051 and a cam portion 4052. The side wall of the cam portion 4052 abuts against the second shaft body 405.

[0040] It is to be noted that the second blade 4051 is preferably a rotary blade, and the cam portion 4052 is always in abutment with one end of the second shaft body 405, the minimum radial dimension of the cam portion 4052 allows one end of the first shaft body 404 to abut against the first filter 401, and the maximum radial dimension of the cam portion 4052 causes the second filter 402 to contact the vibration column 403 above it. When the water flow impacts the second blade 4051, the second shaft body 405 rotates circumferentially and drives the cam portion 4052 to rotate circumferentially, and the first shaft body 404 is driven to move up and down by the cam portion 4052.

[0041] Specifically, to enable the first shaft body 404 to rotate circumferentially easily relative to the first filter 401, reduce the friction between the cam portion 4052 and the first shaft body 404, and enable the first shaft body 404 to collide with the first filter 401 after moving downward, the vibration column 403 is arranged at one end of the metering shell 202 close to the filter shell 201, the center of the first filter 401 has a tapered hole 4012, one end of the first shaft body 404 away from the metering shell 202 has a tapered surface 4042 and a contact portion, the contact portion is preferably a ball head, the vibration column 403 contacts the second filter 402 after the second filter 402 moves upward by a predetermined distance, and the tapered surface 4042 contacts the hole wall of the tapered hole 4012 after the second filter 402 moves downward by a predetermined distance, and the contact portion passes through the tapered hole 4012. Figure 3

[0042] It is to be noted that, since the water flow flows from the inner cylinder cavity 1015 into the filter cavity 2011, to avoid the second filter 402 continuously contacting the vibration column 403 under the impact of the water flow, and to enable the second filter 402 to move downward and cause the tapered surface 4042 to collide with the hole wall of the tapered hole 4012 when the cam portion 4052 is at the lowest point, the metering shell 202 has a guide column 2025 at one end close to the filter shell 201, a magnetic disk 2026 is rotatably arranged on the guide column 2025, one end of the first shaft body 404 away from the second shaft body 405 has a recessed hole 4043, the guide column 2025 extends into the recessed hole 4043, the side surface of the guide column 2025 is in abutment with the hole wall of the recessed hole 4043, the bottom wall of the recessed hole 4043 is provided with a magnet 4044, the magnet 4044 is spaced apart from the magnetic disk 2026 by a predetermined distance, the magnet 4044 and the magnetic disk 2026 have opposite magnetic properties, and the magnetic disks 2026 and the magnet 4044 are magnetized in the up-down direction. Figure 3 Figure 4 ​​​

[0043] It is to be noted that, by setting the repelling magnet 4044 and the magnetic disc 2026, when the second filter 402 rotates circumferentially, the distance between the magnet 4044 and the magnetic disc 2026 is constant, the magnet 4044 only drives the magnetic disc 2026 to rotate circumferentially and does not interfere with the circumferential movement of the second filter 402. Because the magnet 4044 and the magnetic disc 2026 have opposite magnetic properties, the repulsion force makes the first shaft body 404 have a downward force, which offsets the upward impact force of the water flow on the second filter 402. In addition, preferably, the magnetic repulsion force is slightly greater than the upward impact force of the water flow on the second filter 402, so that when the cam is at the minimum radial size, the first shaft body 404 is affected by the magnetic repulsion force and moves downward and drives the conical surface 4042 to exert an impact force on the hole wall of the conical hole 4012, so as to shake down the trapped impurities on the first filter 401. At the same time, because the magnetic repulsion force is only slightly greater than the upward impact force of the water flow on the second filter 402, the first blade 4041 can still drive the first filter 401 to rotate circumferentially after being impacted by the water. In addition, the second blade 4051 can still drive the cam part 4052 to rotate circumferentially after being impacted by the water, and when the cam part 4052 is at the maximum radial size, the second filter 402 can move upward and collide with the vibration column 403.

[0044] Further, as shown in Figure 5 each of the impurity storage cavities 2012 includes a first chamber and a second chamber, one end of the first chamber is in communication with the filter screen cavity 4011, and two ends of the second chamber are in communication with the first chamber and the filter cavity 2011 respectively near one end of the metering shell 202. The filter assembly 40 further includes an impurity collection assembly 406, which includes a sliding ring 4061, a first baffle 4062, an elastic member, a filter ring 4063, and a filter screen. The filter screen is arranged in the second chamber, the sliding ring 4061 is slidingly arranged in the first chamber, the sliding ring 4061 has a first central hole 40511, the first baffle 4062 is fixedly installed in the first chamber, the two ends of the elastic member are connected with the sliding ring 4061 and the filter ring 4063 respectively, and the filter ring 4063 has a second central hole, the hole wall of the second central hole has a plurality of bristles. When the sliding ring 4061 slides by a predetermined distance, the first baffle 4062 closes or opens the first central hole 40511 away from the filter ring 4063.

[0045] It should be noted that by setting the first baffle 4062 and the sliding ring 4061, when the second filter 402 is not blocked or not seriously blocked, the sliding ring 4061 is normally closed to the first central hole 40511 by the elastic force of the elastic member, when the second filter 402 is partially blocked, the water pressure in the filter screen cavity 4011 increases, at this time, the sliding ring 4061 overcomes the resistance of the elastic member and makes the first baffle 4062 no longer close the first central hole 40511, then the water flow can flow into the impurity storage cavity 2012, at this time, the impurities shaken to the outside and shaken down can flow into the first chamber, and when passing through the filter ring 4063, the impurities retained on the bristles of the filter ring 4063, and the water flow passes through the filter screen on the second chamber and flows into the filter cavity 2011.

[0046] Further, in order to optimize the friction and sealing when the second filter 402 rotates circumferentially and moves up and down, as shown in Figure 3 and Figure 5 The second filter 402 is in a cylindrical shape, the filter shell 201 has a first annular groove 2013, the cylinder wall of the second filter 402 extends into the first annular groove 2013, in addition, the cylinder wall of the second filter 402 has a second annular groove 4022, and a lifting ring is slidably arranged in the second annular groove 4022.

[0047] It should be noted that when the second filter 402 rotates circumferentially, the cylinder wall of the second filter 402 rotates circumferentially in the first annular groove 2013, and when the second filter 402 moves upward, the lifting ring seals the gap generated when the second filter 402 moves upward.

[0048] Further, in an embodiment of the present application, as shown in Figure 3As shown, the second blade 4051 on the second shaft 405 is placed in the outer cylinder cavity 1016. Specifically, the second shaft 405 includes a long shaft section 4053, a short shaft section 4054, and a stabilizing section 4055. The second blade 4051 is disposed on the short shaft section 4054, and the cam portion 4052 is disposed on the long shaft section 4053. The short shaft section 4054 has an inner hole, and one end of the stabilizing section 4055 is disposed in the inner hole and connected to the short shaft section 4053. The short shaft section 4054 is rotatably inserted through the vertical cylinder section 1014. The long shaft section 4053 is provided with the cam section 4052. The long shaft section 4053 is located inside the inner cylinder cavity 1015, and one end of the long shaft section 4053 is connected to the short shaft section 4054. The other end of the long shaft section 4053 is rotatably mounted on the cavity wall of the inner cylinder cavity 1015. The other end of the stabilizing section 4055 is connected to the cavity wall of the outer cylinder cavity 1016.

[0049] It should be noted that during installation, one end of the long shaft section 4053 is first rotated and installed on the cavity wall of the inner cylinder cavity 1015, and the short shaft section 4054 is inserted into the vertical cylinder part 1014. The long shaft section 4053 and the short shaft section 4054 are then fixedly connected by means of snap-fit, bonding, etc. It should be pointed out that at this time, the stabilizing section 4055 is slidably concealed in the concealed hole. After the long shaft section 4053 and the short shaft section 4054 are connected, the stabilizing section 4055 is pulled out and connected to the cavity wall of the outer cylinder cavity 1016. Then, the stabilizing section 4055 and the short shaft section 4054 are fixedly connected by means of bonding, etc.

[0050] In another embodiment of this application, such as Figure 6 As shown, the second blade 4051 and the cam portion 4052 on the second shaft 405 are both placed in the inner cylinder cavity 1015. For ease of installation, the second shaft 405 is also designed in three sections as shown in the figure, and the three sections are connected in sequence after being installed in the designated position.

[0051] In summary, the volumetric water meter with replaceable metering module described in the embodiments of this application is explained, which provides the advantage of a self-cleaning dual filter for the volumetric water meter with replaceable metering module.

[0052] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from these principles.

Claims

1. A volumetric water meter with a replaceable metering module, comprising a housing assembly and a metering component, the housing assembly comprising a lower housing and an upper housing, the lower housing having a central chamber, the central chamber having a vertical cylindrical portion having an inner cylindrical cavity, the cavity between the central chamber and the vertical cylindrical portion being an outer cylindrical cavity, and the upper housing having a metering cavity for accommodating the metering component, characterized in that: The metering assembly includes a filter shell, a metering shell, and a piston. The metering shell has a movable cavity, and the bottom wall of the movable cavity has an inlet and an outlet. The piston is reciprocally disposed within the movable cavity between the inlet and the outlet. The filter shell has a filter cavity that extends into the inner cylinder cavity, and both ends of the filter cavity are connected to the inner cylinder cavity and the inlet, respectively. The outlet is connected to the outer cylinder cavity. The replaceable metering module volumetric water meter also includes a filter assembly, which is disposed in the filter chamber. The filter assembly includes a first filter element, a second filter element, and a vibrating column. A filter screen cavity is provided between the first filter element and the second filter element. Both the first filter element and the second filter element have a plurality of filter holes, and the aperture of the filter holes of the first filter element is larger than the aperture of the filter holes of the second filter element. The filter shell also has a plurality of impurity storage cavities, which are connected to the filter screen cavity. The second filter element is rotatably and vertically disposed in the filter chamber. The vibrating column is located on the side of the second filter element away from the first filter element. When the second filter element moves up and down, the second filter element collides with the first filter element or the vibrating column. The filter assembly includes a first shaft, which is rotatably mounted on one end of the metering shell near the filter shell. The sidewall of the first shaft is provided with a first blade. The first shaft passes through the center of the second filter element and is fixedly connected to the second filter element. The first blade is located inside the filter cavity. The filter assembly further includes a second shaft, which is rotatably mounted on the lower housing. One end of the first shaft away from the metering housing passes through the second filter element. The second shaft is provided with a second blade and a cam portion, and the sidewall of the cam portion abuts against the second shaft.

2. The volumetric water meter with replaceable metering module according to claim 1, characterized in that: The vibrating column is located at one end of the metering shell near the filter shell. The first filter element has a conical hole at its center. The first shaft has a conical surface and a contact portion at its end away from the metering shell. When the second filter element moves upward a predetermined distance, the vibrating column contacts the second filter element. When the second filter element moves downward a predetermined distance, the conical surface contacts the wall of the conical hole, and the contact portion passes through the conical hole.

3. The volumetric water meter with replaceable metering module according to claim 1, characterized in that: The metering shell has a guide post at one end near the filter shell, and a disk is rotatably mounted on the guide post. The first shaft has a recess at one end away from the second shaft. The guide post extends into the recess, and the side of the guide post fits against the wall of the recess. A magnet is provided on the bottom wall of the recess. The magnet is spaced a predetermined distance from the disk, and the magnet has the opposite magnetic properties to the disk.

4. The volumetric water meter with replaceable metering module according to claim 1, characterized in that: Each of the impurity storage chambers includes a first chamber and a second chamber. One end of the first chamber is connected to the filter chamber, and both ends of the second chamber are connected to the first chamber and the filter chamber near the metering shell, respectively. The filter assembly also includes an impurity collection assembly, which includes a sliding ring, a first baffle, an elastic element, a filter ring, and a filter screen. The filter screen is disposed in the second chamber, and the sliding ring is slidably disposed in the first chamber. The sliding ring has a first central hole, and the first baffle is fixedly installed in the first chamber. Both ends of the elastic element are connected to the sliding ring and the filter ring, respectively. The filter ring has a second central hole, and the wall of the second central hole has a plurality of bristles. When the sliding ring slides a predetermined distance, the end of the first baffle away from the filter ring closes or opens the first central hole.

5. The volumetric water meter with a replaceable metering module according to claim 1, characterized in that: The second filter element is cylindrical, and the filter shell has a first annular groove. The cylindrical wall of the second filter element extends into the first annular groove, and the cylindrical wall of the second filter element has a second annular groove. A lifting ring is slidably disposed in the second annular groove.

6. The volumetric water meter with replaceable metering module according to claim 1, characterized in that: The second shaft includes a long shaft section, a short shaft section, and a stabilizing section. The second blade is disposed on the short shaft section, and the cam portion is disposed on the long shaft section. The short shaft section has an internal hole. One end of the stabilizing section is disposed in the internal hole and connected to the short shaft section. The short shaft section rotatably passes through the vertical cylinder portion. The cam portion is disposed on the long shaft section. The long shaft section is disposed in the inner cylinder cavity, and one end of the long shaft section is connected to the short shaft section. The other end of the long shaft section is rotatably mounted on the cavity wall of the inner cylinder cavity. The other end of the stabilizing section is connected to the cavity wall of the outer cylinder cavity.

7. The volumetric water meter with replaceable metering module according to claim 2, characterized in that: The metering assembly further includes an upper cover, a rotating shaft, and a second baffle. The second baffle is fixedly installed inside the movable cavity. The movable cavity has a first cylinder with a protruding post inside. The inlet and outlet are located on opposite sides of the second baffle. The piston can slide along the second baffle. The upper cover closes the opening of the movable cavity. The piston has an extension post in its middle section. The two ends of the extension post abut against the rotating shaft and the protruding post, respectively. When the piston moves in a circular motion around the protruding post, the extension post drives the rotating shaft to rotate circumferentially.

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