Disc type water meter movement structure

Abstract

The invention provides a disc type water meter movement structure which comprises a shell, a main shaft, a disc and a flashboard, a working cavity is formed in the shell and provided with an upper inner wall, a side inner wall and a lower inner wall, and a water inlet and a water outlet which are adjacent to each other are formed in the side inner wall; the main shaft is rotationally mounted on the shell and is coaxial with the working cavity, a shifting fork is arranged at the lower end of the main shaft, and a magnet is arranged at the upper end of the main shaft; the disc is rotationally mounted between the two mounting grooves through a spherical hinge and divides the working cavity into an upper cavity and a lower cavity, the axis of the disc is inclined to the axis of the working cavity, and a shifting rod is arranged at the upper end of the spherical hinge; a flashboard hole is formed in the disc; the flashboard is vertically arranged in the working cavity and penetrates through the flashboard hole, and the flashboard enables the upper cavity and the lower cavity to form a water passing channel. The disc type water meter movement structure is compact in structure, small in size, low in manufacturing cost, high in flow adaptability, good in metering stability, high in adaptability to fluctuation of the water flow speed, capable of reducing metering deviation caused by unstable water flow to a certain degree and high in metering precision.

Description

TECHNICAL FIELD

[0001] The present application relates to a water meter, in particular to a disc type water meter movement structure. BACKGROUND

[0002] With the development of social economy and the improvement of people's living standards, the measurement and management of water resources become increasingly important. As the core equipment of water resource measurement, water meter plays an indispensable role in daily life. According to its working principle and structural form, the traditional water meter can be divided into many types, among which the disc type water meter still occupies a place in some application scenarios due to its relatively simple structure, convenient manufacturing and stable measurement.

[0003] The classic disc type water meter usually contains a disc rotating under the action of water flow, which transmits the movement of the disc to the counting mechanism through mechanical transmission or magnetic coupling, thereby realizing the cumulative measurement of water flow. However, the existing disc type water meter movement structure still has some technical problems to be improved in practical application. For example, under the impact of water flow, the stability of disc rotation may be affected, resulting in decreased measurement accuracy; in the long-term operation process, the friction and wear inside the movement may be aggravated, affecting the service life and maintenance cost of the water meter; in addition, the adaptability to different water quality environments and the performance of anti-blocking and anti-corrosion have always been the problems that need to be continuously concerned in the development of disc type water meter technology.

[0004] In particular, some disc type water meters are prone to jamming of the internal precision mechanism when facing water flow containing impurities, thereby affecting the normal measurement function of the water meter. At the same time, in order to improve the sensitivity of measurement and reduce the starting flow, fine optimization of the structural design is often needed to reduce the water flow resistance, but this may conflict with the stability and durability of the mechanism. Therefore, how to design a disc type water meter movement structure that can effectively improve the stability and reliability of operation, reduce wear and enhance the adaptability to different water quality environments while ensuring the measurement accuracy has become a key problem to be solved in the current water meter technology field. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a disc type water meter movement structure with compact structure, small volume, low cost, strong flow adaptability, good measurement stability, strong adaptability to water flow speed fluctuations and reduced measurement deviation caused by unstable water flow to a certain extent. The present application provides a disc type water meter movement structure, which comprises: a housing, a working cavity is arranged in the housing, the working cavity has an upper inner wall, a side inner wall and a lower inner wall, the center of the upper inner wall and the lower inner wall is provided with a mounting groove, the two mounting grooves and the side inner wall are arc surfaces with the same spherical center; a water inlet and a water outlet are arranged adjacent to each other on the side inner wall; a main shaft rotatably mounted on the housing and coaxial with the working cavity, a lower end of the main shaft being provided with a shift fork, the shift fork being located above the mounting groove of the upper inner wall, an upper end of the main shaft being provided with a magnet; a disc rotatably mounted between the two mounting grooves by a spherical hinge and separating the working cavity into an upper cavity and a lower cavity, an axis of the disc being inclined to an axis of the working cavity, an upper end of the spherical hinge being provided with a shift lever for shifting the shift fork; a strip-shaped gate hole being formed in the disc; a gate vertically arranged in the working cavity and passing through the gate hole, the gate being located between the water inlet and the water outlet and forming water passing channels for the upper cavity and the lower cavity respectively; when water flows into the water inlet, water pressure in the upper cavity and the lower cavity can alternately push the upper surface and the lower surface of the disc and make the disc swing around the axis of the working cavity and shift the shift fork to rotate, thereby driving the magnet to rotate.

[0006] Further, a communication hole is formed in the upper inner wall and / or the lower inner wall, the communication hole being arranged near the water inlet.

[0007] Further, the communication hole is strip-shaped and its width gradually increases from inside to outside along the radial direction of the working cavity.

[0008] Further, the cross-sectional area of the communication hole is smaller than that of the water inlet.

[0009] Further, the communication hole is water-drop-shaped.

[0010] Further, the width of the water inlet gradually increases in the direction close to the water outlet.

[0011] Further, a plurality of grooves are circumferentially distributed on the edge of the disc, the grooves communicating the upper surface and the lower surface of the disc.

[0012] Further, the grooves are arc-shaped.

[0013] Further, the width of the grooves is smaller than or equal to the thickness of the disc.

[0014] Further, the depth of the grooves is smaller than or equal to 1mm.

[0015] Further, the grooves are 60-80.

[0016] Further, a guide wheel mounting portion is arranged in the gate hole, an end of the guide wheel mounting portion being rotatably mounted with a guide wheel capable of contacting the side wall of the gate, a rotation axis of the guide wheel being perpendicular to the axis of the disc; the guide wheel being arranged at the water inlet end and / or the water outlet end of the gate.

[0017] Furthermore, the upper inner wall and the lower inner wall are provided with recessed holes for accommodating the guide wheel.

[0018] Furthermore, the side wall of the gate hole 30 is provided with a first through hole connecting the upper and lower surfaces of the disc. The first through hole is located on the water inlet side and corresponds to the connecting holes on the upper and lower inner walls.

[0019] Furthermore, the sidewall of the guide wheel is axially evenly distributed with multiple strip grooves, which connect the two ends of the guide wheel.

[0020] Furthermore, the sidewall of the gate is provided with a first arc-shaped protrusion and a second arc-shaped protrusion concentric with the ball joint of the disc. The first arc-shaped protrusion is used to contact the circular surface of the guide wheel. The second arc-shaped protrusion is located outside the first arc-shaped protrusion and its protrusion height is greater than that of the first arc-shaped protrusion. The second arc-shaped protrusion has a limiting surface that can contact the ball-shaped protrusion at the end of the guide wheel and prevent its axial movement.

[0021] Furthermore, the guide wheel is made of a wear-resistant, self-lubricating material.

[0022] Furthermore, the guide wheel is made of molybdenum disulfide with PA1010 and solid lubricant.

[0023] Furthermore, the side of the second arc-shaped protrusion facing away from the guide wheel is a slope.

[0024] Furthermore, the axis of the working cavity is located on the plane where the gate is located. The gate is fan-shaped and has a first end that contacts the upper inner wall, a second end that contacts the lower inner wall, a third end that contacts the side inner wall, and a fourth end that contacts the ball joint of the disc.

[0025] Furthermore, the disk includes a sphere and a disk body disposed on the side wall of the sphere, the outer diameter of which is the same as the inner diameter of the inner side wall. The center of the disk body is concentric with the center of the sphere. A strip-shaped hole is formed on the disk body to form a gate hole. The first end of the gate hole extends out of the disk body, and the second end of the gate hole extends out of the side wall of the sphere.

[0026] Furthermore, the upper and / or lower surfaces of the disk are evenly distributed with strip-shaped protrusions in the circumferential direction, and the length direction of the strip-shaped protrusions is parallel to the radial direction of the disk.

[0027] Furthermore, the disc body divides the sphere into an upper hemisphere and a lower hemisphere. The top of the upper hemisphere is provided with a mounting plane. The lever is disposed on the mounting plane and is coaxial with the disc body. A second through hole passes through the upper hemisphere and the lower hemisphere.

[0028] Furthermore, the housing is composed of an upper housing and a lower housing. The upper inner wall is an arc-shaped surface and is disposed on the upper housing. The center of the upper inner wall is concave upward to form a first mounting groove concentric with the inner sidewall. The upper end of the first mounting groove is concave upward to form a receiving groove for accommodating the shift fork. The sidewall of the upper housing is provided with an adjacent first water inlet and a first water outlet. The lower inner wall is an arc-shaped surface and is disposed on the lower housing. The center of the lower inner wall is concave upward to form a second mounting groove concentric with the inner sidewall. The sidewall of the lower housing is provided with an adjacent second water inlet and a second water outlet. The second water outlet and the first water outlet are joined together to form a complete water outlet.

[0029] The disc-type water meter mechanism of this invention has a compact structure, small size, low cost, strong flow adaptability, good metering stability, strong adaptability to fluctuations in water flow velocity, and reduces metering deviation caused by unstable water flow to a certain extent, resulting in high metering accuracy. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the disc-type water meter mechanism of the present invention; Figure 2 This is a schematic diagram of the disc-type water meter mechanism structure from another angle. Figure 3 This is a cross-sectional view of the disc-type water meter mechanism structure of the present invention; Figure 4 This is an exploded structural diagram of the disc-type water meter mechanism of the present invention; Figure 5 This is a schematic diagram of the installation of the disc in the disc-type water meter movement structure of the present invention; Figure 6 This is a schematic diagram of the housing of the disc-type water meter movement structure of the present invention; Figure 7 This is a schematic diagram of the installation of the gate plate in the disc-type water meter mechanism structure of the present invention; Figure 8 This is a schematic diagram of the lower housing of the disc-type water meter movement structure of the present invention; Figure 9 This is a schematic diagram of the gate plate of the disc-type water meter mechanism structure of the present invention; Figure 10 This is a schematic diagram of the gate plate of the disc-type water meter mechanism structure of the present invention from another angle; Figure 11 This is a schematic diagram of the upper housing of the disc-type water meter movement structure of the present invention; Figure 12 This is a schematic diagram of the disc structure of the disc-type water meter movement of the present invention; Figure 13 This is a schematic diagram showing the installation of the guide wheel of the disc in the disc-type water meter movement structure of the present invention; Figure 14 This is a cross-sectional view of the disc of the disc-type water meter movement structure of the present invention; Figure 15 for Figure 14 Enlarged view of section A in the middle; Figure 16 This is a simulation diagram of pressure loss without connecting holes; Figure 17 This is a simulation diagram of pressure loss when there are connecting holes; Figure 18 The flow velocity simulation diagram is shown when there are no connecting holes. Figure 19 The flow velocity simulation diagram is shown when there are connecting holes; Figure 20 This is a simulation diagram of the lateral flow velocity.

[0031] In the diagram: 1. Shell, 1a. Upper shell, 1b. Lower shell, 10a. Upper inner wall, 10b. Side inner wall, 10c. Lower inner wall, 100. Working chamber, 101. First water inlet, 102. Second water inlet, 103. Water outlet, 104. Upper connecting hole, 105. Lower connecting hole, 106. First mounting groove, 107. Receiving groove, 108. Second mounting groove, 109. Recessed hole, 111. Third mounting groove, 112. Fourth mounting groove, 2 1. Gate plate; 21. Second arc-shaped protrusion; 22. First arc-shaped protrusion; 231. First end; 232. Second end; 24. Third end; 25. Fourth end; 3. Disc; 30. Gate plate hole; 301. First through hole; 302. Guide wheel mounting part; 31. Ball; 310. Second through hole; 32. Disc body; 320. Groove; 33. Lever; 34. Strip protrusion; 4. Guide wheel; 51. Main shaft; 511. Lever fork; 52. Magnet; 6. Sealing ring. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] See Figures 1-20 The present invention provides a disc-type water meter mechanism structure, which includes a housing 1, a main shaft 51, a disc 3 and a gate 2.

[0034] The housing 1 serves as the mounting carrier, and the main shaft 51, the disc 3, and the gate 2 are all mounted on the housing 1. Specifically, a working cavity 100 is provided inside the housing 1. The working cavity 100 has an upper inner wall 10a, a side inner wall 10b, and a lower inner wall 10c. The upper inner wall 10a is located at the upper end, the lower inner wall 10c is located at the lower end, and the side inner wall 10b is located between the upper inner wall 10a and the lower inner wall 10c. A mounting groove is provided at the center of both the upper inner wall 10a and the lower inner wall 10c. The two mounting grooves and the side inner wall 10b are concentric arc surfaces (spherical surfaces). Adjacent water inlets and outlets 103 are provided on the side inner wall 10b. The outlet 103 extends outward to form a protruding structure, and a sealing ring 6 is provided at the end of the outlet 103.

[0035] The main shaft 51 is rotatably mounted on the housing 1. The main shaft 51 is coaxial with the working cavity 100. A shift fork 511 is provided at the lower end of the main shaft 51. In this embodiment, there are two shift forks 511, which are evenly distributed circumferentially on the side wall of the main shaft 51. The shift fork 511 is located above the mounting groove of the upper inner wall 10a. A magnet 52 is provided at the upper end of the main shaft 51. The magnet 52 is located outside the housing 1 and has a ring structure. It is used to couple with the counter to realize counting.

[0036] The disc 3 is disposed in the working cavity 100 and is rotatably mounted between two mounting grooves via a ball joint (i.e., a ball). The disc 3 divides the working cavity 100 into an upper cavity and a lower cavity. The axis of the disc 3 is inclined to the axis of the working cavity 100. In this embodiment, the angle between the axis of the disc 3 and the axis of the working cavity 100 is 15-35 degrees. A lever 33 is provided at the upper end of the ball joint. The lever 33 is coaxial with the disc and is used to rotate the lever fork 511. A strip-shaped gate hole 30 is provided on the disc 3 for mounting the gate 2.

[0037] The gate 2 is vertically installed in the working chamber 100, passing through the gate hole 30. The gate 2 is located between the inlet and outlet 103, which respectively form water passages in the upper and lower chambers. That is, by setting the gate 2, a circular water passage is formed between the inlet and outlet of the upper and lower chambers.

[0038] When water flows in from the inlet, the water pressure in the upper and lower chambers alternately pushes the upper and lower surfaces of the disc 3, causing the disc 3 to swing in a circle around the axis of the working chamber 100. The lever above moves the fork 511 to rotate, which in turn drives the magnet 52 to rotate, thus realizing counting.

[0039] The axis of the disc and the axis of the working chamber are at an angle. When water flows and impacts the surface of the disc, the water pressure acting on the inclined surface generates a tangential component force, forming a torque that propels the disc to oscillate. This design efficiently converts the linear kinetic energy of the fluid into the rotational oscillation kinetic energy of the disc. The disc divides the working chamber, allowing water to flow alternately through the upper and lower chambers, applying alternating pressures to the upper and lower surfaces of the disc, thus forming a continuous and stable driving torque. This allows the flow meter to start and operate smoothly even at very low flow rates, improving the sensitivity of the measurement range. This application utilizes fluid dynamics and mechanical principles to convert the linear kinetic energy of water flow into the rotational oscillation kinetic energy of a disk, which is then transferred to the outside for counting without contact via magnetic coupling. The entire system has core advantages such as compact structure, low wear, long lifespan, and accurate and reliable measurement.

[0040] In this application, a connecting hole is provided on the upper inner wall 10a and the lower inner wall 10c. The connecting hole is located on the side near the water inlet, that is, the working chamber (water inlet end) located there is connected to the outside of the shell through the connecting hole. The design of the connecting hole can ensure the stability of the flow field, balance the pressure, reduce energy consumption, and ensure that the metering mechanism can be reliably started and operated in any position, thereby improving the overall performance. The inlet, also known as the main inlet, serves as the primary water intake point. Two connecting holes also allow water to enter. Specifically, without connecting holes, when the disc swings to a certain angle, its edge may completely block the main inlet, instantly cutting off the water flow to one side. This would not only cause water flow interruption but may also form a closed air or water mass in the blocked chamber, creating an airlock or waterlock. The connecting holes, as a normally open backup channel, allow fluid to continuously enter the blocked chamber even if the disc temporarily blocks the main inlet. This ensures that the pressure difference necessary to drive the disc's swing can be continuously and smoothly established, avoiding disc jamming, metering interruption, or accuracy distortion caused by water flow interruption. During installation, the water inlet of the water meter's movement is located on the side furthest from the meter casing. This means that the water flow needs to make a sharp turn after entering the casing before flowing into the main inlet of the working chamber. This layout easily generates eddies and dead zones in the inlet area, resulting in significant local pressure loss, wasted energy, and potentially affecting sensitivity at low flow rates. The connecting hole essentially establishes a direct and smooth pressure relief and flow guiding channel between the high-pressure area at the inlet and the inlet area of ​​the working chamber. This helps the water flow fill the inlet area of ​​the working chamber more smoothly, balancing the pressure in that area and reducing turbulence and energy loss caused by sudden changes and restrictions in the flow path, thereby reducing the overall pressure of the unit. This reduces force loss and improves energy efficiency. However, the disc blocking the inlet not only causes flow interruption but also creates instantaneous pressure imbalance between the upper and lower inlet areas. This imbalance applies an irregular, abrupt torque to the disc, causing unstable oscillation and resulting in shaking or jumping, severely affecting the accuracy and repeatability of measurement. This application uses a connecting hole to ensure the working chamber's inlet area is always connected to an external high-pressure water source, providing a constant pressure source for this area. This ensures that regardless of the disc's position, the pressure difference driving its oscillation changes continuously and smoothly, resulting in very stable and uniform disc oscillation, thus leading to higher and more reliable measurement accuracy.

[0041] In this embodiment, the connecting hole is strip-shaped, and its width gradually increases from the inside to the outside along the radius of the working chamber. At the water inlet of the working chamber, water flows in from the inlet on the side wall. The water flow velocity is higher and the flow rate is greater near the outside, while the water flow near the center is relatively gentle. Designing the connecting hole to gradually widen from the inside to the outside perfectly matches this uneven distribution of water flow velocity and flow rate. This shape ensures that, per unit time, the outer area with a large water flow demand has a larger channel area for pressure compensation and fluid exchange, while the inner area requires a smaller channel area. This makes pressure balance more efficient and accurate, avoiding local eddies or new pressure losses caused by unreasonable distribution of the connecting hole area. As a result, the disk's oscillation is more evenly stressed and its movement is more stable.

[0042] In this application, the connecting hole is teardrop-shaped, a streamlined design that reduces flow resistance and minimizes turbulence and flow separation. This reduces the local resistance of water flowing through the hole to an extremely low level, thereby improving the flow meter's efficiency. In this embodiment, the cross-sectional area of ​​the connecting hole is smaller than that of the inlet. The connecting hole serves to balance pressure and ensure flow, rather than acting as the main inlet channel. If the area of ​​the connecting hole were equal to or larger than the inlet, the water flow would tend to choose the path of least resistance, with a large amount of water directly short-circuiting through the connecting hole instead of impacting the disc surface to provide driving force. By making the connecting hole area smaller, its flow resistance is much greater than that of the main inlet. This forces most of the water flow and kinetic energy to enter through the main inlet and act on the upper or lower surface of the disc, thereby generating an effective driving torque to propel the disc to oscillate, ensuring the accuracy, sensitivity, and reliability of the measurement.

[0043] The width of the inlet gradually increases along the direction close to the outlet 103. That is, the closer to the outlet, the larger the axial width of the inlet, and the farther away from the outlet, the smaller the axial width. The oscillation of the disc requires the torque generated by the water flow impacting its surface to drive it. The inlet design with this structure enables the water flow to drive the disc to oscillate better, improving the oscillation stability and metering accuracy.

[0044] In this embodiment, multiple grooves 320 are evenly distributed circumferentially along the edge of the disk 3. These grooves 320 connect the upper and lower surfaces of the disk 3, i.e., connect the upper and lower cavities. This increases the flow velocity at the gap between the disk edge and the inner wall 10b, providing lubrication. The gap between the disk edge and the inner wall 10b is very small; without the grooves, the fluid in the gap is almost still, and the disk faces boundary friction during oscillation, resulting in significant resistance. The presence of the grooves provides a direct flow path for the high-pressure water in the upper and lower cavities. When water flows through these grooves, it... A flowing water film is formed in the narrow gap, which serves as a lubricant, reduces losses, and makes the conical oscillation of the disc more stable and smooth. This directly translates into higher metering accuracy and repeatability, stable reading pulses, and more accurate counting. Furthermore, the water flow at this point can flush the gaps between the disc edge and the inner side wall, effectively removing any tiny particles that may have deposited there. This provides continuous self-cleaning, preventing impurities from accumulating and causing gap blockage, increased resistance, or even jamming. This greatly improves the long-term reliability and durability of the flow meter under complex water quality conditions.

[0045] In this application, the groove 320 is arc-shaped, and its width is less than or equal to the thickness of the disk. In this embodiment, the depth of the groove 320 is less than or equal to 1 mm, and the number of grooves is 60-80. This makes the water flow through the groove smoother and the energy loss smaller, which optimizes the quality of the lubricating water film.

[0046] A guide wheel mounting part 302 is provided inside the gate hole 30. A guide wheel 4 is rotatably mounted at the end of the guide wheel mounting part 302. The guide wheel 4 can contact the side wall of the gate 2. The rotation axis of the guide wheel 4 is perpendicular to the axis of the disc 3. The guide wheel 4 is located on the inlet or outlet side of the gate 2, preferably on the outlet side, and plays a supporting role for the disc. Without the guide wheel, the disc would directly slide against the fixed gate through the gate hole. This frictional resistance is large, which not only consumes water flow energy, but also leads to wear of the gate hole and the gate, increasing the fit clearance and gradually losing accuracy. With the addition of the guide wheel, the interaction between the disc and the gate becomes rolling friction between the guide wheel and the side wall of the gate. This reduces the water flow energy required to drive the disc to swing, reduces the starting flow of the flow meter, and reduces the overall pressure loss. At the same time, This design virtually eliminates wear on gate-related components, ensuring long-term stability of the fit and allowing the flowmeter to maintain its initial high accuracy throughout its lifespan, significantly extending its lifespan. The disc is supported by a ball joint (sphere), and while its axial position is fixed, its radial direction lacks constraint. Under water flow impact, especially asymmetrical impacts or pressure fluctuations, the disc may experience slight radial movement or vibration, directly affecting the stability of its oscillation trajectory. By setting a guide wheel structure, with the guide wheel closely attached to the gate's sidewall, a reliable radial support point is provided for the disc. This constrains the disc's degrees of freedom in the horizontal plane, strictly limiting its oscillation trajectory to a stable conical oscillation around the center of the sphere. This significantly improves the smoothness and repeatability of the disc's movement, reduces unpredictable vibrations, and further enhances the accuracy and reliability of the metering signal. Since the guide wheel has a certain diameter, in order to ensure that the disk swings in place, in this embodiment, a recessed hole 109 is provided on the upper inner wall 10a and the lower inner wall 10c. The recessed hole 109 is used to accommodate the guide wheel 4, avoid the guide wheel 4 from contacting the upper inner wall or the lower inner wall, and ensure that the disk swings smoothly.

[0047] In this application, multiple strip grooves are evenly distributed axially on the side wall of the guide wheel 4. These strip grooves connect the two ends of the guide wheel 4. When the guide wheel rotates, the strip grooves on its surface will carry a small amount of fluid in, which plays a lubricating role, making the disc swing more smoothly, responding more sensitively to small flow rates, eliminating guide wheel wear, and extending service life.

[0048] In this embodiment, the guide wheel is made of wear-resistant self-lubricating material, preferably molybdenum disulfide composed of PA1010 (polydecylated diamine) and solid lubricant, which improves the overall lubricity and wear resistance, ensures the smooth operation of the disc, and extends its service life.

[0049] Meanwhile, a first arc-shaped protrusion 22 and a second arc-shaped protrusion 21, concentric with the ball joint (sphere) of the disc 3, are provided on the side wall of the gate plate 2. The second arc-shaped protrusion 21 is located outside the first arc-shaped protrusion 22. The first arc-shaped protrusion 22 is used to contact the circular surface of the guide wheel 4, that is, the contact surface between the guide wheel 4 and the gate plate 2. The protrusion height of the second arc-shaped protrusion 21 is greater than the protrusion height of the first arc-shaped protrusion 22. The second arc-shaped protrusion 21 has a first surface facing the guide wheel 4 and a second surface facing away from the guide wheel 4. The first surface serves as a limiting surface and can interact with... The end of the guide wheel 4 contacts the guide wheel 4, thus axially limiting its movement and preventing it from moving outwards. The width of this first surface is greater than or equal to the diameter of the guide wheel 4. The second surface, the side facing away from the guide wheel 4, is an inclined surface facing the outlet. The first arc-shaped protrusion 22 serves as the contact surface with the guide wheel 4, ensuring smooth contact and rotation of the guide wheel 4. As the first reinforcing structure, it ensures the structural strength of the gate 2, prevents deformation, and improves the overall reliability and stability of operation. The first surface (limiting surface) of the second arc-shaped protrusion 21... As a mechanical stop, it directly contacts the end of the guide wheel 4, effectively preventing the guide wheel 4 from axially dislodging outward or from axially moving, providing reliable axial positioning for the entire guide wheel system; the second surface of the second arc-shaped protrusion 21 is designed as an inclined surface facing the outlet; the second surface of the second arc-shaped protrusion 21 is an inclined surface, forming a built-in fluid guiding structure. When the water flows through the gate, this inclined surface can smoothly guide the water flow towards the outlet, avoiding the generation of a large flow separation zone and energy dissipation eddies behind the gate (outlet side), thereby reducing the local resistance when the water flows through the gate area, effectively reducing the pressure loss of the whole machine and improving energy efficiency; finally, the second arc-shaped protrusion 21 has the function of reinforcing ribs, improving the overall structural strength and rigidity of the gate 2.

[0050] Meanwhile, a first through hole 301 is provided on the side wall of the gate hole 30, connecting the upper and lower surfaces of the disc 3. This first through hole is located on the inlet side and corresponds to the connecting holes on the upper and lower inner walls. The first through hole and the connecting holes on the upper and lower inner walls are basically on the same vertical line. This area after the shell and disc are combined is through. The water flow in this area will not drive the disc to move, but it can reduce pressure loss. At the same time, it will also prevent positive and negative pressure from being generated inside due to pressure or temperature changes, thereby affecting the metering accuracy.

[0051] In this embodiment, the axis of the working cavity 100 is located on the plane where the gate plate 2 is located. The gate plate 2 is a fan-shaped ring with a first end 231 that contacts (connects) the upper inner wall 10a, a second end 232 that contacts (connects) the lower inner wall 10c, a third end 24 that contacts (connects) the side inner wall 10b, and a fourth end 25 that contacts the ball joint of the disk 3. Specifically, the first end, the second end, and the third end are all provided with protrusions for engaging with the housing 1. There will be a certain gap between the fourth end 25 and the outer wall of the ball joint (sphere) to form a water film and reduce friction.

[0052] The structure of disk 3 in this application is described below: The disk 3 includes a sphere 31 and a disk body 32 disposed on the side wall of the sphere 31. The disk body 32 is a circular plate-like structure, and its outer diameter is the same as the inner diameter of the inner side wall 10b. In actual production, the outer diameter of the disk body 32 is slightly smaller than the inner diameter of the inner side wall 10b to facilitate assembly and stable operation. The center of the disk body 32 is concentric with the sphere 31. A strip-shaped hole is formed on the disk body 32, which forms a gate hole 30. The length direction of the gate hole 30 is parallel to the radial direction of the disk body 32, and the first end of the gate hole 30 extends to the outer edge of the disk body 32. The second end of the gate hole 30 extends to the side wall of the sphere 31. An outward-facing stepped surface is provided on the first side of the gate hole 30, forming a guide wheel mounting portion 302. A shaft hole is provided on the guide wheel mounting portion 302 for mounting the guide wheel 4. The guide wheel 4 includes a shaft and a guide wheel body connected to each other. The shaft is rotatably mounted in the shaft hole. The diameter of the guide wheel body is larger than the diameter of the shaft, for contacting the gate 2. A recessed hole is provided at the center of the end of the guide wheel 4, and a spherical protrusion is provided in the recessed hole. This spherical protrusion can contact the second arc-shaped protrusion on the gate 2, serving as an axial limiting device. The first through hole 301 is provided on the second side of the gate hole 30. In this embodiment, it is a recessed structure provided on the second side of the gate hole 30. After installation, the first through hole 301 and the guide wheel 4 are located on both sides of the gate 2, i.e., the first through hole 301 is located on the inlet side, and the guide wheel 4 is located on the outlet side.

[0053] The aforementioned disc body 32 divides the sphere 31 into an upper hemisphere and a lower hemisphere, which limit the overall tilt angle of the disc body. A mounting plane is provided at the top of the upper hemisphere, and a lever 33 is mounted on this plane. This reduces the space occupied in terms of height (thickness), improving structural compactness. The lever 33 is coaxial with the disc body 32, and a second through hole 310 passes through between the upper and lower hemispheres. The second through hole 310 connects the mounting grooves of the lower inner wall 10c and the upper inner wall 10a. Multiple second through holes 310 are evenly distributed circumferentially around the axis of the disc body 32. The mounting plane provides a stable mounting base for the lever 33. Compared to direct connection on the curved spherical surface, this provides a larger contact area and higher connection strength, ensuring that the lever 33 can accurately and without deformation transmit the disc's oscillation to the main shaft's fork, reducing errors and elastic deformation during motion transmission, and improving the accuracy and reliability of measurement. The second through hole 310 directly connects to the mounting grooves on the upper and lower inner walls, i.e., the support area of ​​the ball joint. It allows a small amount of water to continuously flow through the ball joint area, forming a lubricating film, reducing wear between the ball and the mounting groove, and achieving the purpose of lubrication. At the same time, the flowing water can carry away tiny particles that may enter the gap between the ball joints, preventing impurities from accumulating and getting stuck, thus achieving the purpose of cleaning. In addition, it helps to dissipate the small amount of heat generated by friction, ensuring smooth movement. Furthermore, through the second through hole, the fluid pressure on the upper and lower sides of the ball (i.e., the upper and lower contact areas of the ball joint support) is balanced, ensuring the balance and flexibility of the swing, and avoiding the formation of a pressure difference in the ball joint area. Such a pressure difference would generate an additional axial force on the ball, affecting the flexibility and sensitivity of the disc swing. Pressure balance ensures that the disc can still respond flexibly at low flow rates, improving metering accuracy.

[0054] Strip-shaped protrusions 34 are provided on the upper and lower surfaces of the disc 3. Their length direction is parallel to the radial direction of the disc 3. Multiple strip-shaped protrusions 34 are provided on both the upper and lower surfaces, evenly distributed circumferentially, preferably 4-8, and symmetrically arranged on both surfaces. These strip-shaped protrusions 34 optimize water flow propulsion efficiency. Specifically, when water flows over the disc surface, these radial protrusions act as guide vanes, better guiding the water flow radially towards the edge of the disc, thus more effectively converting it into torque to propel the disc's oscillation, further improving driving efficiency and metering stability. The symmetrical arrangement of the strip-shaped protrusions 34 on both the upper and lower surfaces ensures good balance and stable disc operation. Furthermore, these strip-shaped protrusions 34 also serve as reinforcing ribs, improving the overall structural strength of the disc 3.

[0055] In this application, the housing 1 is composed of an upper housing 1a and a lower housing 1b. An upper inner wall 10a is provided on the upper housing 1a. The upper inner wall 10a is an arc-shaped surface and forms a conical structure with a lower center and a higher outer side. The center of the upper inner wall 10a is concave upward to form a first mounting groove 106 concentric with the inner side wall 10b. The first mounting groove 106 is a spherical surface with the same radius as the sphere on the disk, used to accommodate the upper hemisphere. The upper end of the first mounting groove 106 is concave upward to form a receiving groove 107 for accommodating the shift fork 511. An adjacent first water inlet 101 and a... are provided on the side wall of the upper housing 1a. The first water outlet has a first water inlet 101 that is fan-shaped or triangular, with the end closest to the first water outlet being the larger diameter end. A first mounting groove for mounting a gate is provided on the upper inner wall 10a. The first mounting groove extends to the side wall of the upper housing 1a to form a second mounting groove. An upper connecting hole 104 is provided through the upper inner wall 10a. The upper connecting hole 104 is teardrop-shaped and corresponds to the first through hole 301 on the disc, that is, it is located directly above the first through hole 301. At the same time, a concave hole corresponding to the guide wheel 4 is provided on the upper inner wall 10a to accommodate the guide wheel 4 and prevent the guide wheel 4 from colliding with the upper inner wall.

[0056] A lower inner wall 10c is provided on the lower shell 1b. The lower inner wall 10c is an arc-shaped surface, forming a conical structure with a higher center and a lower outer side. The center of the lower inner wall 10c is concave downwards, forming a second mounting groove 108 concentric with the inner side wall 10b. The second mounting groove 108 is a spherical surface with the same radius as the sphere on the disk, used to accommodate the lower hemisphere. Adjacent second water inlets 102 and second water outlets are provided on the side wall of the lower shell 1b. The second water inlet 102 is fan-shaped or triangular, with the end near the second water outlet being the larger diameter end, symmetrical to the first water inlet 101. The second water outlet and... The first outlet is spliced ​​to form a complete outlet 103, which is a rounded rectangular structure. A third mounting groove 111 for installing the gate is provided on the lower inner wall 10c. The third mounting groove 111 extends to the side wall of the lower housing 1b to form a fourth mounting groove 112. A lower connecting hole 105 is provided through the lower inner wall 10c. The lower connecting hole 105 is teardrop-shaped and corresponds to the first through hole 301 on the disc, that is, it is located directly below the first through hole 301. At the same time, a concave hole 109 corresponding to the guide wheel 4 is provided on the lower inner wall 10b to accommodate the guide wheel 4 and prevent the guide wheel 4 from colliding with the lower inner wall.

[0057] In this application, movements with and without connecting holes are simulated, see reference. Figures 16-19 ,from Figure 16 and Figure 17 As can be seen, the absence of connecting holes significantly increases pressure loss; and the absence of connecting holes creates a noticeable vortex region at the inlet end. (See reference...) Figure 18 and Figure 19This leads to turbulent water flow and reduces the stability of the flow field inside the valve body; while the mechanism with connecting holes can effectively guide the water flow smoothly, significantly reducing local pressure loss and improving overall flow efficiency. Figure 20 As can be seen, the flow rate increases at the edge of the disk, which has a lubricating effect, reduces resistance, lowers pressure loss, and improves detection accuracy.

[0058] The disc-type water meter mechanism of this invention has a compact structure, small size, low cost, strong flow adaptability, good metering stability, strong adaptability to fluctuations in water flow velocity, and reduces metering deviation caused by unstable water flow to a certain extent, resulting in high metering accuracy.

[0059] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A disc-type water meter movement structure, characterized in that, include: The housing has a working cavity inside, which has an upper inner wall, a side inner wall, and a lower inner wall. The upper inner wall and the lower inner wall each have a mounting groove at their center. The two mounting grooves and the side inner wall are concentric arc surfaces. The side inner wall has adjacent water inlets and outlets. The main shaft is rotatably mounted on the housing and coaxial with the working cavity. The lower end of the main shaft is provided with a shift fork, which is located above the mounting groove on the upper inner wall. The upper end of the main shaft is provided with a magnet. A disc is rotatably mounted between two mounting grooves via a ball joint, dividing the working chamber into an upper chamber and a lower chamber. The axis of the disc is inclined to the axis of the working chamber. The upper end of the ball joint is provided with a lever for moving the fork. A strip-shaped gate hole is opened on the disc. Multiple grooves are evenly distributed around the edge of the disc, and the grooves connect the upper surface and the lower surface of the disc. A gate is vertically disposed in the working chamber and passes through the gate hole. The gate is located between the water inlet and the water outlet and respectively forms water passages in the upper and lower chambers. When water flows in from the inlet, the water pressure in the upper and lower chambers alternately pushes the upper and lower surfaces of the disc, causing the disc to swing around the axis of the working chamber and rotate the fork, thereby driving the magnet to rotate.

2. The disc-type water meter movement structure as described in claim 1, characterized in that: A connecting hole is provided on the upper inner wall and / or the lower inner wall, and the connecting hole is located on the side near the water inlet.

3. The disc-type water meter movement structure as described in claim 2, characterized in that: The connecting hole is strip-shaped and its width gradually increases from the inside to the outside along the radial direction of the working cavity.

4. The disc-type water meter movement structure as described in claim 1, characterized in that: The width of the inlet gradually increases towards the outlet.

5. The disc-type water meter movement structure as described in claim 1, characterized in that: A guide wheel mounting part is provided inside the gate hole. A guide wheel that can contact the side wall of the gate is rotatably mounted at the end of the guide wheel mounting part. The rotation axis of the guide wheel is perpendicular to the axis of the disc. The guide wheel is located on one side of the gate's inlet end and / or outlet end.

6. The disc-type water meter movement structure as described in claim 5, characterized in that: The upper inner wall and the lower inner wall are provided with recessed holes for accommodating the guide wheel.

7. The disc-type water meter movement structure as described in claim 2, characterized in that: The side wall of the gate hole is provided with a first through hole connecting the upper and lower surfaces of the disc. The first through hole is located on the water inlet side and corresponds to the connecting holes on the upper and lower inner walls.

8. The disc-type water meter movement structure as described in claim 1, characterized in that: The sidewall of the gate is provided with a first arc-shaped protrusion and a second arc-shaped protrusion concentric with the ball joint of the disc. The first arc-shaped protrusion is used to contact the circular surface of the guide wheel. The second arc-shaped protrusion is located outside the first arc-shaped protrusion and its protrusion height is greater than that of the first arc-shaped protrusion. The second arc-shaped protrusion has a limiting surface that can contact the ball-shaped protrusion at the end of the guide wheel and prevent its axial movement.

9. The disc-type water meter movement structure as described in claim 1, characterized in that: The disk includes a sphere and a disk body disposed on the side wall of the sphere, the outer diameter of which is the same as the inner diameter of the inner side wall. The center of the disk body is concentric with the center of the sphere. A strip-shaped hole is formed on the disk body to form a gate hole. The first end of the gate hole extends out of the disk body, and the second end of the gate hole extends to the side wall of the sphere. The disk body divides the sphere into an upper hemisphere and a lower hemisphere. The top of the upper hemisphere is provided with a mounting plane. The lever is disposed on the mounting plane and coaxial with the disk body. A second through hole passes through the upper hemisphere and the lower hemisphere.

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