Volumetric water meter metering mechanism

Abstract

The invention relates to the technical field of water meters, and discloses a volumetric water meter metering mechanism which comprises a metering shell, a piston and a flashboard. A first water inlet and a water outlet are formed in the side portion of the metering shell, and a second water inlet and a third water inlet are formed in the two opposite ends of the metering shell respectively. The flashboard is arranged in the metering shell, and the flashboard is matched with the piston to separate the first water inlet, the second water inlet and the third water inlet from the water outlet, so that water flows into the water outlet from the first water inlet, the second water inlet and the third water inlet, and then flows into the water outlet; and the piston is pushed to perform circular motion around the axis of the metering shell so as to reach the water outlet. According to the invention, metering precision can be improved.

Description

Technical Field

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

[0002] In the existing volumetric water meter measuring mechanism, the housing end face of the measuring mechanism is provided with a water inlet and the side face is provided with a water outlet. When the water meter is working, the water flow drives the piston to rotate in the housing of the measuring mechanism, guiding the water flow from the water inlet to the water outlet.

[0003] However, during the rotation process, the piston will be affected by the friction resistance of the contact surface with the metering mechanism housing. In the case of low-speed water flow, the water flow will not overcome the resistance and cannot push the piston to rotate. At the same time, the water flow will escape to the water outlet, causing the water meter to fail to measure low-speed and small-flow water flow, affecting the metering accuracy of the water meter. Summary of the Invention

[0004] In order to improve the measurement accuracy, the present application provides a volumetric water meter measurement mechanism.

[0005] This application provides a volumetric water meter measuring mechanism, which adopts the following technical solutions: A volumetric water meter measuring mechanism comprises: a measuring housing, a piston and a gate plate; a first water inlet and a water outlet are provided on the side of the measuring housing, and a second water inlet and a third water inlet are provided at opposite ends of the measuring housing; the gate plate is arranged in the measuring housing, and the gate plate separates the first water inlet, the second water inlet and the third water inlet from the water outlet by cooperating with the piston, so that after water flows into the first water inlet, the second water inlet and the third water inlet, it pushes the piston to perform a circular motion around the axis of the measuring housing to reach the water outlet.

[0006] By adopting the above technical solution, water is introduced through the combination of the first water inlet to impact and push the side of the piston, thereby increasing the initial starting torque of the rotating piston and improving the ability to overcome the static friction resistance of the piston, so as to reduce the starting flow threshold of the metering mechanism and improve the sensitivity of the metering mechanism in responding to the starting small flow.

[0007] Optionally, the water flow entering the first water inlet is in the direction of the circular motion of the piston.

[0008] Optionally, the first water inlet is a porous array structure.

[0009] By adopting the above technical solution, the multi-hole water inlet can reduce the impact intensity of single-point water flow through flow channel diversion and increase the service life of the metering mechanism.

[0010] Optionally, the second water inlet is opposite to the third water inlet.

[0011] By adopting the above technical solution, the impact force of the water flow relative to the water inlet can be offset, making it difficult for the piston to tilt its axis.

[0012] Optionally, the water flow entering direction of the first water inlet intersects with the water flow entering direction of the second water inlet and the water flow entering direction of the third water inlet.

[0013] By adopting the above technical solution, the intersecting water flows are conducive to the formation of vortices, enhancing the fluid energy coupling effect and assisting the piston movement.

[0014] Optionally, the metering mechanism further includes a metering rotor component rotatably connected to the metering housing, and the metering rotor component is in driving cooperation with the piston.

[0015] By adopting the above technical solution, the piston movement is converted into the rotation of the metering rotor through mechanical transmission, which is convenient for the external sensor to read.

[0016] Optionally, the metering shell includes a bottom shell and a cover shell that are spliced ​​together, the first water inlet, the water outlet, the third water inlet and the gate are arranged on the bottom shell, and the second water inlet is arranged on the cover shell.

[0017] By adopting the above technical solution, the processing difficulty can be reduced through split installation.

[0018] Optionally, the piston includes a spacer ring and a partition plate; the spacer ring is fitted with the metering housing and the gate plate, and a connecting port is provided on the periphery of the spacer ring, and the connecting port is connected to the water outlet; the partition plate is arranged in the spacer ring, and a water hole is opened on the partition plate.

[0019] By adopting the above technical solution, the connecting port can guide the water flow in the piston to the water outlet, and the water hole balances the pressure on both sides of the partition, reducing the resistance of the piston movement.

[0020] Optionally, the piston also includes a first central axis coaxial with the partition ring, the first central axis is arranged on the partition, and a second central axis close to the first central axis is coaxially provided in the metering shell, and the first central axis performs circular motion around the second central axis when driven by the piston.

[0021] By adopting the above technical solution, the double central shafts cooperate to constrain the radial deviation of the piston, thereby improving the stability of the piston movement.

[0022] In summary, this application has at least one of the following beneficial effects: 1. The first water inlet causes the water flow to form an impact thrust along the direction of the piston's circular motion, which can effectively increase the initial starting torque of the rotating piston. Especially under low flow conditions, it can quickly overcome static friction resistance, improve the water meter's response sensitivity to small flows, and lower the starting flow threshold.

[0023] 2. The first water inlet realizes diversion through multi-hole water inlet to reduce the impact intensity of single-point water flow and improve the operation stability and service life of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an embodiment of the present application; Figure 2 yes Figure 1 Cross-section of the middle AA; Figure 3 yes Figure 1 A top view of Figure 4 yes Figure 3 Cross-section of the middle BB; Figure 5 It is a schematic diagram of the explosion structure of an embodiment of the present application; Figure 6 It is a schematic structural diagram of the metering rotor component in an embodiment of the present application.

[0025] Explanation of the accompanying drawings: 1. Metering shell; 101. Bottom shell; 1011. Outer shell; 1012. First inner ring; 102. Cover shell; 1021. Top cover; 1022. Second inner ring; 2. Piston; 21. Spacer ring; 22. Partition; 23. First central axis; 3. Gate; 4. First water inlet; 5. Water outlet; 6. Second water inlet; 7. Third water inlet; 8. Metering rotor; 81. Rotating shaft; 82. Magnetic steel assembly; 83. Toggle seat; 9. Connecting port; 10. Water hole; 11. Second central axis; 12. Socket slot; 13. Give way slot; 14. Notch; 15. Section; 16. Sliding cavity. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 This application is described in further detail.

[0027] The embodiment of the present application discloses a volumetric water meter measuring mechanism. Figure 1 and Figure 2 The volumetric water meter measuring mechanism includes a measuring shell 1, a piston 2 and a gate 3. The measuring shell 1 has a water inlet and a water outlet 5 connected to the inner cavity. The gate 3 and the piston 2 are both installed in the measuring shell 1 and cooperate with each other. The piston 2 is pushed by the water flow to perform a circular motion around the axis of the measuring shell 1 in the measuring shell 1, so that the water flows from the water inlet to the water outlet 5 during the movement of the piston 2. At the same time, the metering mechanism measures once to count the water flow rate.

[0028] Reference Figure 1 、 Figure 2 and Figure 3 , wherein the water inlet on the metering shell 1 includes a first water inlet 4, a second water inlet 6 and a third water inlet 7. The first water inlet 4 and the water outlet 5 are both opened on the outer wall of the metering shell 1, and the first water inlet 4 and the water outlet 5 are distributed in sequence along the circumference of the metering shell 1. The second water inlet 6 is opened at the top end of the metering shell 1 along its own axis, and the third water inlet 7 is opened at the bottom end of the metering shell 1 along its own axis, and the second water inlet 6 and the third water inlet 7 are opposite and symmetrical along the axial direction of the metering shell 1. At the same time, the gate 3 is located between the first water inlet 4 and the water outlet 5, and the second water inlet 6 and the third water inlet 7 are both in the space on the side of the gate 3 away from the water outlet 5, so as to separate the first water inlet 4, the second water inlet 6 and the third water inlet 7 from the water outlet 5. It should be noted that when the water flows to the metering mechanism, the water flows into the metering shell 1 from the first water inlet 4, the second water inlet 6 and the third water inlet 7 respectively and impacts the piston 2. The axial extension direction of the second water inlet 6 and the third water inlet 7, that is, the water flow entry direction, is parallel to the axial direction of the metering shell 1, so that the water flow from the second water inlet 6 and the water flow from the third water inlet 7 flow into the metering shell 1 in parallel with the axial direction, thereby balancing the force on the piston 2 in the axial direction and making it difficult for the axis of the piston 2 to tilt relative to the axis of the metering shell 1.

[0029] As for the first water inlet 4, a radial line of the metering housing 1 formed by connecting the first water inlet 4 with the central axis of the metering housing 1 is positioned as a first radial line. The first radial line intersects the axis of the first water inlet 4 and forms an acute angle θ. The angle θ is between 0° and 60°, preferably 7° in this embodiment. The axis of the first water inlet 4 is oriented in the direction of the circumferential motion of the piston 2. Thus, when the water flowing into the first water inlet 4 acts on the outer wall of the piston 2, the water flow forms a tangential component and a radial component relative to the direction of the circumferential motion of the piston 2, causing the water flow to form an impact thrust along the direction of the circumferential motion of the piston 2, thereby increasing the initial starting torque of the piston 2. This allows the static friction between the piston 2 and the metering housing 1 to be quickly overcome under low flow conditions, improving the water meter's response sensitivity to small flow rates and lowering the starting flow threshold. At the same time, the additional thrust generated by the water flow flowing into the first water inlet 4 can dynamically compensate for the increase in frictional resistance caused by mechanical wear of the piston 2 and the metering housing 1 over time, maintaining metering accuracy.

[0030] It should be noted that the first water inlet 4 can be configured as a single hole or a multi-hole array. In this embodiment, the first water inlet 4 is preferably a multi-hole array with two symmetrical first water inlets 4. The multi-hole water inlet design reduces the impact strength of the single-point water flow through the flow channel diversion. The opening size of the first water inlet 4 is smaller than the size of any one of the second water inlet 6 and the third water inlet 7, so that the water flows mainly from the second water inlet 6 and the third water inlet 7, and secondarily from the first water inlet 4. The opening size of the second water inlet 6 and the third water inlet 7 gradually decreases along the circumference of the metering housing 1 in the direction away from the gate 3, and the first water inlet 4 is closer to the gate 3 than the second water inlet 6 and the third water inlet 7, so that the water flows from the first water inlet 4, the second water inlet 6, and the third water inlet 7 intersect, thereby generating a synergistic vortex effect between the water flows from the first water inlet 4, the second water inlet 6, and the third water inlet 7, thereby strengthening the continuous driving force on the piston 2.

[0031] Reference Figure 4 and Figure 5 Furthermore, the metering housing 1 includes a bottom shell 101 and a cover that cover each other. The bottom shell 101 includes a coaxially fixed outer shell 1011 and a first inner ring 1012. The first water inlet 4 and the third water inlet 7 are both provided on the outer shell 1011. The first inner ring 1012 is annular and fixed in the outer shell 1011. The inner wall of the outer shell 1011 and the outer wall of the first inner ring 1012 are provided with opposing slots. The two sides of the gate 3 that are away from each other are respectively inserted into the slots of the outer shell 1011 and the first inner ring 1012 to limit the position of the gate 3. The cover shell 102 includes a top cover 1021 and a second inner ring 1022. The second water inlet 6 is provided on the top cover 1021. The second inner ring 1022 is annular and fixed to the bottom of the top cover 1021. The outer circumferential wall of the second inner ring 1022 also has a slot for fitting the end of the gate 3.

[0032] The piston 2 comprises a spacer ring 21, a spacer plate 22, and a first central axis 23. The spacer ring 21 is annular, with a sleeve slot 12 extending axially along its annular wall. This slot 12 extends through both ends of the ring 21 in the axial direction, as well as through both its inner and outer sides, interrupting the circumferential continuity of the ring 21 and providing a sleeve for the gate plate 3. The spacer plate 22 is fixed to the center of the inner cavity of the spacer ring 21, dividing the inner cavity into two sections. The spacer plate 22 is provided with a clearance slot 13 for accommodating the gate plate 3. Furthermore, the spacer plate 22 is provided with a plurality of water holes 10 arranged in an array, connecting the upper and lower cavities of the spacer ring 21. Furthermore, the spacer ring 21 has two communication ports 9 on one side of the sleeve slot 12, which face and connect to the upper and lower cavities of the ring 21, respectively. The first central shaft 23 is in the shape of a circular shaft and is fixed on the partition plate 22 . The first central shaft 23 is coaxial with the partition ring 21 , and has portions extending into the upper and lower cavities of the partition ring 21 .

[0033] When the metering housing 1 and the piston 2 are mated, the axis of the piston 2 is parallel to the axis of the metering housing 1. The bottom housing 101 and the top cover 1021 jointly clamp the piston 2. The piston 2 is slidably mounted on the partition 22 through the sleeve. The partition ring 21 is coaxially arranged with the outer shell 1011, and the outer wall of the partition ring 21 is inscribed in the inner wall of the outer shell 1011. The outer wall of the first inner ring 1012 and the outer wall of the second inner ring 1022 are both inscribed in the inner wall of the partition ring 21. The top surface of the first inner ring 1012 abuts against the bottom surface of the partition 22, and the bottom surface of the second inner ring 1022 abuts against the top surface of the partition 22. At the same time, the connecting port 9 on the piston 2 is located on the side of the gate 3 close to the water outlet 5, so that the connecting port 9 is opposite to and connected to the water outlet, so that the water entering the piston 2 can flow from the connecting port 9 to the water outlet 5.

[0034] Reference Figure 4 Furthermore, a second central axis 11 with an outer wall provided with an outer sleeve is coaxially fixed in the outer shell 1011, and the outer peripheral surface of the first central axis 23 is close to the outer peripheral surface of the second central axis 11. When the piston 2 rotates in the metering shell 1, it drives the first central axis 23 to rotate around the second central axis 11, and if the piston 2 is slightly offset, it can abut against the outer peripheral surface of the second central axis 11 to support the piston 2 and improve the stability of the piston 2.

[0035] Reference Figure 5 Furthermore, in some embodiments, to facilitate assembly of the piston 2, a notch 14 is obliquely cut into the spacer ring 21 on the side of the sleeve notch 12 away from the communication port 9. The notch 14 extends from the bottom of the spacer ring 21 to a position near the bottom surface of the partition plate 22. The cut surface 15 formed by the notch 14 is inclined from the outer wall of the spacer ring 21 to the inner wall of the spacer ring 21. This reduces the thickness of the spacer ring 21 at the notch 14, making it easier to fit the spacer ring 21 downward onto the gate plate 3. In addition, when water flows into the notch 14, the water flow can generate thrust on the cut surface 15, further assisting the rotation of the piston 2.

[0036] Reference Figure 4 and Figure 6 In addition, in this embodiment, the metering mechanism also includes a metering rotor component 8. The metering rotor component 8 is in transmission cooperation with the piston 2. Specifically, the metering rotor component 8 includes a rotating shaft 81, a magnetic steel assembly 82, and a toggle seat 83. The rotating shaft 81 is coaxially connected to the top cover 1021 for rotation. The magnetic steel assembly 82 is coaxially sleeved on the top of the rotating shaft 81. The toggle seat 83 is coaxially fixed to the bottom of the rotating shaft 81 and has a sliding cavity 16 for the first central shaft 23 to slide. When the piston 2 rotates in the metering housing 1, the first central shaft 23 moves in the sliding cavity 16 to drive the rotating shaft 81 and the magnetic steel assembly 82 to rotate synchronously.

[0037] The implementation principle of the volumetric water meter measuring mechanism of the embodiment of the present application is: water flows into the metering shell 1 and the piston 2 from the first water inlet 4, the second water inlet 6 and the third water inlet 7, and the pressure of the water flow pushes the piston 2 to perform circular motion around the axis of the metering shell 1 in the metering shell 1, so that the water flows from the water inlet to the water outlet 5, and at the same time, the first central axis 23 drives the magnetic steel assembly 82 to rotate for metering.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A volumetric water meter measuring mechanism, characterized in that: include: A metering housing (1), a piston (2) and a gate plate (3); a first water inlet (4) and a water outlet (5) are provided on the side of the metering housing (1), and a second water inlet (6) and a third water inlet (7) are provided at opposite ends of the metering housing (1); the gate plate (3) is arranged in the metering housing (1), and the gate plate (3) separates the first water inlet (4), the second water inlet (6) and the third water inlet (7) from the water outlet (5) by cooperating with the piston (2), so that water flows in from the first water inlet (4), the second water inlet (6) and the third water inlet (7), and then reaches the water outlet (5) by pushing the piston (2) to perform a circular motion around the axis of the metering housing (1).

2. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The water flow entering the first water inlet (4) is directed toward the circumferential motion direction of the piston (2).

3. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The first water inlet (4) is in a multi-hole array structure.

4. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The second water inlet (6) is opposite to the third water inlet (7).

5. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The water flow entering direction of the first water inlet (4) intersects with the water flow entering direction of the second water inlet (6) and the water flow entering direction of the third water inlet (7).

6. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The metering mechanism further comprises a metering rotor component (8) rotatably connected to the metering housing (1), wherein the metering rotor component (8) is in transmission cooperation with the piston (2).

7. A volumetric water meter measuring mechanism according to claim 1, characterized in that: The metering housing (1) comprises a bottom shell (101) and a cover shell (102) that are connected to each other; the first water inlet (4), the water outlet (5), the third water inlet (7) and the gate (3) are arranged on the bottom shell (101); and the second water inlet (6) is arranged on the cover shell (102).

8. The volumetric water meter measuring mechanism according to claim 1, characterized in that: The piston (2) includes a spacer ring (21) and a partition plate (22); the spacer ring (21) is matched with the metering housing (1) and the gate plate (3), and a communication port (9) is provided on the periphery of the spacer ring (21), and the communication port (9) is connected to the water outlet (5); the spacer plate (22) is arranged in the spacer ring (21), and a water hole (10) is opened on the spacer plate (22).

9. A volumetric water meter measuring mechanism according to claim 8, characterized in that: The piston (2) further comprises a first central axis (23) coaxial with the partition ring (21), the first central axis (23) being arranged on the partition plate (22), and a second central axis (11) coaxially arranged in the metering housing (1) and close to the first central axis (23), the first central axis (23) performing a circular motion around the second central axis (11) driven by the piston (2).

Images