Flow metering mechanism and volumetric water meter

Abstract

The present invention provides a flow metering mechanism and a volumetric water meter, relating to the technical field of water meters. The flow metering mechanism provided by the present invention comprises: a metering chamber housing and a rotor rotatably connected to the interior of the metering chamber housing, wherein the outer contour of the rotor's cross section is configured as a Lurox triangle; the rotor fits against the inner wall of the chamber of the metering chamber housing, and the rotor divides the inner cavity of the metering chamber housing into a first partition chamber and a second partition chamber; the metering chamber housing is provided with a plurality of water inlets and a plurality of water outlets, wherein the plurality of water inlets and the plurality of water outlets are spaced apart around the rotation axis of the rotor; at least one water inlet is in fluid communication with the first partition chamber, and at least one water outlet is in fluid communication with the second partition chamber. The flow metering mechanism and volumetric water meter provided by the present invention have a more stable rotor operation, a more obvious driving effect of the water flow on the rotor, and can achieve a more accurate flow metering effect.

Description

Technical Field

[0001] The present invention relates to the technical field of water meters, in particular to a flow metering mechanism and a volumetric water meter. Background Art

[0002] Positive displacement water meters are primarily divided into disc-type and rotary piston-type meters. However, ensuring the rotor rotates flexibly with the flow of water presents a major challenge in their design and production. Furthermore, conventional disc-type and rotary piston-type meters experience significant loosening and wear as the water flows, leading to unstable rotor rotation and thus affecting the accuracy of the meter reading. Summary of the Invention

[0003] The object of the present invention is to provide a flow metering mechanism and a volumetric water meter to alleviate the technical problem that the rotor does not respond accurately to the water flow, thereby affecting the flow metering accuracy.

[0004] In a first aspect, the present invention provides a flow metering mechanism comprising: a metering chamber housing and a rotor rotatably connected to the interior of the metering chamber housing, wherein the outer contour of the cross section of the rotor is configured as a Lurox triangle;

[0005] The rotor is attached to the inner wall of the cavity shell of the metering chamber, and the rotor divides the inner cavity of the cavity shell of the metering chamber into a first separation cavity and a second separation cavity;

[0006] The metering chamber housing is provided with a plurality of water inlets and a plurality of water outlets, and the plurality of water inlets and the plurality of water outlets are respectively arranged at intervals around the rotation axis of the rotor;

[0007] At least one of the water inlets is in fluid communication with the first partition chamber, and at least one of the water outlets is in fluid communication with the second partition chamber.

[0008] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the rotor is provided with a plurality of flow guide chambers, and the plurality of flow guide chambers are spaced apart around the axis of the rotor;

[0009] The rotor is further provided with a plurality of hydraulic blades, each of which corresponds to each of the guide chambers, and each of the hydraulic blades is provided with a guide port;

[0010] At least one of the water inlets is in fluid communication with at least one of the diversion chambers, and the diversion port corresponding to the diversion chamber is in fluid communication with at least one of the water outlets.

[0011] In combination with the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the rotor is further provided with a cache cavity, the cache cavity being located on a side of the hydraulic blade facing away from the water inlet, the cache cavity being separated from the guide port, and the cache cavity being in fluid communication with the water outlet;

[0012] The rotor is provided with a side through hole, one end of the side through hole is communicated with the buffer cavity, and the other end of the side through hole is communicated with the first partition cavity or the second partition cavity fluid.

[0013] In combination with the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the metering chamber housing comprises: a metering chamber bottom shell and a metering chamber cover plate, wherein the metering chamber cover plate is covered on the metering chamber bottom shell;

[0014] The plurality of water inlets are arranged on the bottom of the bottom shell of the metering chamber, and the plurality of water outlets are arranged on the cover plate of the metering chamber.

[0015] In combination with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein a gear is connected to the bottom of the metering chamber cover, an inner gear ring is installed on the rotor, and the gear is meshed with the inner gear ring.

[0016] In combination with the third possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the flow metering mechanism further includes: an eccentric shaft and a magnetic steel assembly;

[0017] The eccentric shaft includes: a first shaft body, a second shaft body and a support member, wherein the support member is connected between the first shaft body and the second shaft body, and the axis of the first shaft body is parallel to the axis of the second shaft body and is spaced apart;

[0018] The first shaft is rotatably connected to the rotor, the second shaft is rotatably connected to the metering chamber cover, and the magnetic steel assembly is connected to the second shaft.

[0019] In combination with the third possible implementation manner of the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein a plurality of radial limit members are connected to the metering chamber cover plate, and the plurality of radial limit members are arranged at intervals around the rotation axis of the rotor;

[0020] The plurality of radial limiting members are used to jointly limit the pressing and limiting assembly.

[0021] In combination with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein a gear portion is provided on the outer side of the radial limiting member.

[0022] In a second aspect, the present invention provides a volumetric water meter comprising: a water meter housing, an indicating mechanism, and the flow metering mechanism described in the first aspect;

[0023] The water meter housing has a water inlet pipe joint and a water outlet pipe joint, the metering chamber cavity shell is installed inside the water meter housing, the water inlet pipe joint is in fluid communication with the water inlet, and the water outlet pipe joint is in fluid communication with the water outlet;

[0024] The indicating mechanism is installed on the water meter housing, and the indicating mechanism is transmission-connected to the rotor.

[0025] In combination with the second aspect, the present invention provides a first possible implementation manner of the second aspect, wherein the water meter housing is provided with a branch pipeline, and the water inlet and the water outlet are respectively in fluid communication with the branch pipeline;

[0026] An adjusting member is installed in the branch pipeline, and the adjusting member is used to adjust the opening of the branch pipeline to the water inlet and the water outlet.

[0027] The embodiments of the present invention bring the following beneficial effects: the outer contour of the cross section of the rotor is configured as a Lurox triangle, the rotor fits against the inner wall of the cavity of the metering chamber, and the rotor divides the inner cavity of the cavity of the metering chamber to form a first separation cavity and a second separation cavity. The cavity of the metering chamber is provided with a plurality of water inlets and a plurality of water outlets, and the plurality of water inlets and the plurality of water outlets are respectively arranged at intervals around the rotation axis of the rotor, at least one water inlet is in fluid communication with the first separation cavity, and at least one water outlet is in fluid communication with the second separation cavity. The rotor with the Lurox triangle structure can better fit inside the cavity of the metering chamber, the operation of the rotor is smoother, the driving effect of the water flow on the rotor is more obvious, and more accurate flow measurement can be obtained.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A cross-sectional view of a flow metering mechanism provided in an embodiment of the present invention;

[0031] Figure 2An exploded view of a flow metering mechanism provided in an embodiment of the present invention;

[0032] Figure 3 A top view of the bottom shell of the metering chamber of the flow metering mechanism provided in an embodiment of the present invention;

[0033] Figure 4 A top view of the metering chamber bottom shell and rotor of the flow metering mechanism provided in an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the rotor of the flow metering mechanism provided in an embodiment of the present invention Figure 1 ;

[0035] Figure 6 Schematic diagram of the rotor of the flow metering mechanism provided in an embodiment of the present invention Figure 2 ;

[0036] Figure 7 A schematic diagram of a metering chamber cover and a radial limiter of a flow metering mechanism provided in an embodiment of the present invention;

[0037] Figure 8 A cross-sectional view of a positive displacement water meter provided in an embodiment of the present invention.

[0038] Icons: 100- metering chamber housing; 101- water inlet; 102- water outlet; 010- first partition chamber; 020- second partition chamber; 110- metering chamber bottom shell; 120- metering chamber cover; 121- gear; 130- radial limiter; 131- gear section; 200- rotor; 201- flow guide chamber; 202- hydraulic blade; 203- flow guide port; 204- buffer chamber; 20 5-side through hole; 300-inner gear ring; 400-eccentric shaft; 410-first shaft; 420-second shaft; 430-support; 500-magnetic steel assembly; 510-magnetic steel shaft; 520-magnet; 600-water meter housing; 601-water inlet pipe joint; 602-water outlet pipe joint; 603-branch pipeline; 700-indicating mechanism; 800-compression limit assembly; 900-adjusting part. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the flow metering mechanism provided by the embodiment of the present invention includes: a metering chamber housing 100 and a rotor 200 rotatably connected to the inside of the metering chamber housing 100; the outer contour of the cross section of the rotor 200 is configured as a Lurox triangle; the rotor 200 is fitted to the inner wall of the chamber of the metering chamber housing 100, and the rotor 200 separates the inner cavity of the metering chamber housing 100 to form a first separation chamber 010 and a second separation chamber 020; the metering chamber housing 100 is provided with a plurality of water inlets 101 and a plurality of water outlets 102, and the plurality of water inlets 101 and the plurality of water outlets 102 are respectively arranged at intervals around the rotation axis of the rotor 200; at least one water inlet 101 is in fluid communication with the first separation chamber 010, and at least one water outlet 102 is in fluid communication with the second separation chamber 020.

[0043] Specifically, the rotor 200, with a Lurox triangle cross-section, can better fit and slide along the inner wall of the metering chamber housing 100, thereby enabling the rotor 200 to rotate. This results in smoother operation, a more pronounced driving effect of the water flow on the rotor 200, and a more precise response to flow rate, enabling more accurate flow measurement. Furthermore, compared to previous rotary piston water meters, the rotor 200 with a Lurox triangle cross-section provides smoother transmission and quieter flow metering.

[0044] In an embodiment of the present invention, the rotor 200 is provided with a plurality of guide chambers 201, which are spaced apart around the axis of the rotor 200. The rotor 200 is further provided with a plurality of hydraulic blades 202, which correspond one-to-one to the plurality of guide chambers 201, and each hydraulic blade 202 is provided with a guide port 203. At least one water inlet 101 is fluidically connected to at least one guide chamber 201, and the guide port 203 corresponding to the guide chamber 201 is fluidically connected to at least one water outlet 102.

[0045] Specifically, the number of the flow guide chamber 201, the water inlet 101 and the water outlet 102 can be increased or decreased according to the structural size of the flow metering mechanism, taking into account the manufacturing cost and process. In this embodiment, there are three flow guide chambers 201 and three hydraulic blades 202, and two water inlet 101 and two water outlet 102. When the rotor 200 is in Figure 4 At the angular position shown, one water inlet 101 is in fluid communication with one diversion chamber 201, and the other water inlet 101 is in fluid communication with the second partition chamber 020. When fluid flows from the water inlet 101 into the diversion chamber 201 and the second partition chamber 020, the fluid impacts the hydraulic blades 202 within the rotor 200, providing rotational driving force. The pressure difference between the fluid in the second partition chamber 020 and the first partition chamber 010 provides rotational driving force outside the rotor 200, thereby causing the rotor 200 to move along a circular trajectory within the metering chamber housing 100 and rotate about its axis of rotation. The three diversion chambers 201 within the rotor 200 serve as internal metering chambers, while the first and second partition chambers 010 and the third partition chamber formed between the rotor 200 and the inner wall of the metering chamber housing 100 serve as external metering chambers. This provides a greater number of metering chambers and enables more accurate metering.

[0046] Furthermore, the rotor 200 is also provided with a cache chamber 204, which is located on the side of the hydraulic blade 202 away from the water inlet 101, and the cache chamber 204 is separated from the guide port 203, and the cache chamber 204 is fluidically connected to the water outlet 102; the rotor 200 is provided with a side through hole 205, one end of the side through hole 205 is connected to the cache chamber 204, and the other end of the side through hole 205 is fluidically connected to the first partition chamber 010 or the second partition chamber 020.

[0047] Specifically, the first partition chamber 010 and the second partition chamber 020 (the external metering chamber of the rotor 200) are connected to the cache chamber 204 through the side through hole 205. As the rotor 200 cyclically moves and rotates, the pressure difference between the internal fluid of the second partition chamber 020 and the first partition chamber 010 can be reduced. During this process, the cache chamber 204 and the water outlet 102 cyclically switch between a connected state and a closed state.

[0048] like Figure 1 、 Figure 2 and Figure 7 As shown, the metering chamber cavity shell 100 includes: a metering chamber bottom shell 110 and a metering chamber cover 120, and the metering chamber cover 120 covers the metering chamber bottom shell 110; multiple water inlets 101 are arranged at the bottom of the metering chamber bottom shell 110, and multiple water outlets 102 are arranged on the metering chamber cover 120.

[0049] Specifically, the metering chamber bottom shell 110 is provided with a pin hole, and the metering chamber cover 120 is provided with a positioning pin. When the metering chamber cover 120 is covered on the metering chamber bottom shell 110, the positioning pin is inserted into the pin hole, thereby ensuring that the metering chamber cover 120 is firmly assembled and positioned relative to the metering chamber bottom shell 110.

[0050] Furthermore, a gear 121 is connected to the bottom of the metering chamber cover 120, and an inner ring gear 300 is mounted on the rotor 200. The gear 121 meshes with the inner ring gear 300. The inner ring gear 300 is embedded in a retaining groove of the rotor 200. When the rotor 200 moves and rotates along a circular trajectory, the gear 121 rotates along the inner ring gear 300. When the gear 121 and the inner ring gear 300 are stably engaged, the rotor 200 operates smoothly inside the metering chamber housing 100.

[0051] like Figure 1 and Figure 2 As shown, the flow metering mechanism also includes: an eccentric shaft 400 and a magnetic steel assembly 500; the eccentric shaft 400 includes: a first shaft body 410, a second shaft body 420 and a support member 430, the support member 430 is connected between the first shaft body 410 and the second shaft body 420, the axis of the first shaft body 410 is parallel to the axis of the second shaft body 420 and is arranged at intervals; the first shaft body 410 is rotatably connected to the rotor 200, the second shaft body 420 is rotatably connected to the metering chamber cover 120, and the magnetic steel assembly 500 is connected to the second shaft body 420.

[0052] The fluid flows from the water inlet 101 into the diversion chamber 201 and the second partition chamber 020, and flows through the diversion port 203 and the first partition chamber 010 to be discharged at the water outlet 102. During this process, the fluid drives the rotor 200 to operate, and the rotor 200 remains coaxial with the first shaft 410. The first shaft 410 rotates around the axis of the second shaft 420. Therefore, while the rotor 200 rotates around the first shaft 410, the rotor 200 also performs a circular motion around the second shaft 420.

[0053] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, a plurality of radial limit members 130 are connected to the metering chamber cover plate 120, and the plurality of radial limit members 130 are spaced apart around the rotation axis of the rotor 200; the plurality of radial limit members 130 are used to jointly limit the clamping limit assembly 800. The clamping limit assembly 800 includes: a tightening block, a gasket, an O-ring and a sealing plate, the O-ring is embedded in the annular groove on the outside of the sealing plate, and the tightening block, gasket and sealing plate are sequentially compressed between the indicating mechanism 700 and the metering chamber housing 100. The inner side of the radial limit member 130 has an arc surface, which is fitted with the side surface of the clamping limit assembly 800 package through the arc surface, thereby ensuring that the clamping limit assembly 800 is accurately assembled and positioned relative to the metering chamber housing 100.

[0054] Furthermore, a gear portion 131 is provided on the outer side of the radial limit member 130. From the axis of the second shaft body 420 to the axis direction away from the second shaft body 420, the gear portion 131 is inclined counterclockwise or clockwise. The fluid discharged from the water outlet 102 can flow out through the gap between the two adjacent radial limit members 130. The gear portion 131 can slow down the rotational flow of the fluid around the second shaft body 420 inside the water meter housing 600.

[0055] like Figure 1 and Figure 8 As shown, the volumetric water meter provided in an embodiment of the present invention includes: a water meter housing 600, an indicating mechanism 700, and the flow metering mechanism described in the above embodiments. The water meter housing 600 has an inlet pipe joint 601 and an outlet pipe joint 602. The metering chamber housing 100 is installed inside the water meter housing 600. The inlet pipe joint 601 is in fluid communication with the water inlet 101, and the outlet pipe joint 602 is in fluid communication with the water outlet 102. The indicating mechanism 700 is installed on the water meter housing 600 and is transmission-connected to the rotor 200. A filter is installed inside the inlet pipe joint 601. The magnetic steel assembly 500 includes a magnetic steel shaft 510 and a magnet 520 mounted on the magnetic steel shaft 510. The indicating mechanism 700 and the magnetic steel assembly 500 are linked by magnetic coupling.

[0056] In this embodiment of the present invention, a water meter housing 600 is provided with a branch conduit 603, with the water inlet 101 and the water outlet 102 respectively being in fluid communication with the branch conduit 603. An adjusting member 900 is installed within the branch conduit 603, and is used to adjust the opening of the branch conduit 603 to the water inlet 101 and the water outlet 102. The adjusting member 900 comprises a plug and a screw. The plug is inserted into the branch conduit 603, and the screw engages with the branch conduit 603 and abuts against the plug, thereby adjusting the insertion depth of the plug and, in turn, the opening of the branch conduit 603 to the water inlet 101 and the water outlet 102, thereby enabling external adjustment of the water meter performance.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow metering mechanism, comprising: A metering chamber housing (100) and a rotor (200) rotatably connected to the interior of the metering chamber housing (100), characterized in that: The outer contour of the cross section of the rotor (200) is configured as a Lurox triangle; The rotor (200) is fitted to the inner wall of the metering chamber housing (100), and the rotor (200) separates the inner cavity of the metering chamber housing (100) to form a first separation cavity (010) and a second separation cavity (020); The metering chamber housing (100) is provided with a plurality of water inlets (101) and a plurality of water outlets (102), and the plurality of water inlets (101) and the plurality of water outlets (102) are respectively arranged at intervals around the rotation axis of the rotor (200); At least one of the water inlets (101) is in fluid communication with the first partition chamber (010), and at least one of the water outlets (102) is in fluid communication with the second partition chamber (020); The rotor (200) is provided with a plurality of flow guide chambers (201), and the plurality of flow guide chambers (201) are arranged at intervals around the axis of the rotor (200); the rotor (200) is further provided with a plurality of hydraulic blades (202), and the plurality of hydraulic blades (202) correspond one-to-one to the plurality of flow guide chambers (201), and each of the hydraulic blades (202) is provided with a flow guide port (203); at least one of the water inlets (101) is in fluid communication with at least one of the flow guide chambers (201), and the flow guide port (203) corresponding to the flow guide chamber (201) is in fluid communication with at least one of the water outlets (102); The rotor (200) is further provided with a cache cavity (204), the cache cavity (204) being located on a side of the hydraulic blade (202) facing away from the water inlet (101), the cache cavity (204) being separated from the guide port (203), and the cache cavity (204) being in fluid communication with the water outlet (102); the rotor (200) is provided with a side through hole (205), one end of the side through hole (205) being in fluid communication with the cache cavity (204), and the other end of the side through hole (205) being in fluid communication with the first separation cavity (010) or the second separation cavity (020).

2. The flow metering mechanism according to claim 1, characterized in that: The metering chamber housing (100) comprises: a metering chamber bottom housing (110) and a metering chamber cover plate (120), wherein the metering chamber cover plate (120) covers the metering chamber bottom housing (110); The plurality of water inlets (101) are arranged on the bottom of the metering chamber bottom shell (110), and the plurality of water outlets (102) are arranged on the metering chamber cover plate (120).

3. The flow metering mechanism according to claim 2, characterized in that: A gear (121) is connected to the bottom of the metering chamber cover plate (120), an inner gear ring (300) is mounted on the rotor (200), and the gear (121) meshes with the inner gear ring (300).

4. The flow metering mechanism according to claim 2, characterized in that: The flow metering mechanism further comprises: an eccentric shaft (400) and a magnetic steel assembly (500); The eccentric shaft (400) comprises: a first shaft body (410), a second shaft body (420) and a support member (430), wherein the support member (430) is connected between the first shaft body (410) and the second shaft body (420), and the axis of the first shaft body (410) and the axis of the second shaft body (420) are parallel and spaced apart. The first shaft (410) is rotatably connected to the rotor (200), the second shaft (420) is rotatably connected to the metering chamber cover (120), and the magnetic steel assembly (500) is connected to the second shaft (420).

5. The flow metering mechanism according to claim 2, characterized in that: A plurality of radial limiting members (130) are connected to the metering chamber cover plate (120), and the plurality of radial limiting members (130) are arranged at intervals around the rotation axis of the rotor (200); The plurality of radial limiting members (130) are used to jointly limit the pressing limiting assembly (800).

6. The flow metering mechanism according to claim 5, characterized in that: A gear portion (131) is provided on the outer side of the radial limiting member (130).

7. A volumetric water meter, characterized in that: include: A water meter housing (600), an indicating mechanism (700), and a flow metering mechanism according to any one of claims 1 to 6; The water meter housing (600) has a water inlet pipe joint (601) and a water outlet pipe joint (602); the metering chamber housing (100) is installed inside the water meter housing (600); the water inlet pipe joint (601) is in fluid communication with the water inlet (101); and the water outlet pipe joint (602) is in fluid communication with the water outlet (102); The indicating mechanism (700) is mounted on the water meter housing (600), and the indicating mechanism (700) is in transmission connection with the rotor (200).

8. The volumetric water meter according to claim 7, characterized in that: The water meter housing (600) is provided with a branch pipeline (603), and the water inlet (101) and the water outlet (102) are respectively in fluid communication with the branch pipeline (603); An adjusting member (900) is installed in the branch pipeline (603), and the adjusting member (900) is used to adjust the opening of the branch pipeline (603) to the water inlet (101) and the water outlet (102).

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