High-precision rotary wing type water meter

Abstract

The utility model relates to the technical field of measuring instruments, in particular to a high-precision rotary wing type water meter which comprises a shell and an impeller rotationally arranged in the shell, the shell comprises a hollow mounting cavity and a water inlet pipe and a water outlet pipe which are located at the two ends of the mounting cavity respectively, and an impeller box provided with a plurality of through holes in the circumferential direction is arranged in the mounting cavity; the impeller is installed in the impeller box, a gear set is connected to the installation cavity, the gear set is in transmission connection with a counter used for counting, a check block capable of sealing the water inlet pipe is arranged at the position, close to the water inlet pipe, in the installation cavity in a sliding mode, the check block is connected with a compression spring, and the impeller comprises a middle shaft and a plurality of rotating blades arranged on the side wall of the middle shaft at intervals in the circumferential direction. The middle shaft is slidably sleeved with a locking assembly capable of locking rotation of the impeller, the locking assembly is in transmission connection with the check block, when no water flow exists in the water inlet pipe, the check block seals the water inlet pipe, and the locking assembly limits rotation of the impeller. The water meter impeller can be locked when no water flow exists, and the situation that the impeller rotates under the inertia effect, and counting errors are generated is avoided.

Description

Technical Field

[0001] This application relates to the field of measuring instrument technology, and in particular to a high-precision rotary vane water meter. Background Technology

[0002] A rotary vane water meter is a product used for measuring the total unidirectional water flow in small-diameter pipes, suitable for household water consumption measurement, such as pipes with diameters of 15mm and 20mm. The rotary vane water meter mainly consists of a casing, an impeller measuring mechanism, a reduction gear mechanism, and an indicator, and is characterized by its simple structure. During measurement, water flows through an opening into the impeller housing and impacts the impeller, causing it to rotate. The impeller then drives the metering gear set to rotate, causing the water meter counter to start counting.

[0003] However, in reality, when the valve is closed, after the water flows through the impeller, the impeller of the water meter will still rotate an additional number of times due to inertia, thereby driving the counting gear set to rotate, causing errors in the counter count and affecting the final counting result of the water meter. Utility Model Content

[0004] To overcome the shortcomings of existing rotary water meters where the impeller's inertial rotation causes counting errors, this application provides a high-precision rotary water meter.

[0005] The high-precision rotary vane water meter provided in this application adopts the following technical solution:

[0006] A high-precision rotary vane water meter includes a housing and an impeller rotatably disposed inside the housing. The housing includes a hollow mounting cavity and an inlet pipe and an outlet pipe located at opposite ends of the mounting cavity. An impeller box with several through holes circumferentially arranged is disposed within the mounting cavity. The impeller is mounted within the impeller box. A gear set is connected to the mounting cavity, and the gear set is driven by a counter for counting. The meter is characterized in that a stop block is slidably disposed within the mounting cavity near the inlet pipe to close the inlet pipe. The stop block is connected to a compression spring. The impeller includes a central shaft and several rotating blades spaced circumferentially on the side wall of the central shaft. A locking assembly is slidably sleeved on the central shaft to lock the rotation of the impeller. The locking assembly is driven by the stop block. When there is no water flow in the inlet pipe, the stop block closes the inlet pipe, and the locking assembly restricts the rotation of the impeller.

[0007] Optionally, the locking assembly includes a locking disc slidably sleeved on the central shaft, and a plurality of locking pins spaced apart and connected to the side of the locking disc near the rotating blade. There is at least one locking pin between two adjacent rotating blades. A crossbar is connected to the side of the locking disc away from the locking pins. The other end of the crossbar is fixedly connected to the stop block. When the stop block rises, there is a gap between the plurality of locking pins along the axial direction and the ends of the plurality of rotating blades near the locking disc.

[0008] Optionally, a positioning ring is provided in the mounting cavity, with its bottom side and the end of the rotating blade along the axial direction of the central axis located on the same plane. A tension spring is installed on the positioning ring, and the other end of the tension spring is connected to the locking disc.

[0009] Optionally, the baffle has a ramp on the side near the water inlet pipe, and the ramp is located at the lower end of the baffle. The material density of the baffle is less than the density of the water.

[0010] Optionally, a baffle is integrally connected to the impeller box on the same side of each of the through holes. The extension direction of the baffle is the same as that of the water flow and completely covers the through holes. There is a radial gap between the other end of the baffle away from the impeller box and the impeller box.

[0011] Optionally, a pressure regulating valve for adjusting the air pressure balance in the mounting cavity is embedded in the water inlet pipe or water outlet pipe.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. This application achieves the rotation lock of the impeller inside the water meter when no water flows through, thereby preventing the impeller from rotating under inertia after water flows through, reducing the probability of errors in the final counting result displayed by the water meter, and improving the counting accuracy.

[0014] 2. This application improves the impeller box structure on the water meter, thereby ensuring that the water meter reading does not change when the water flows back or against the current, and eliminating the impact of unexpected situations on the water meter counting. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-precision rotary vane water meter according to this application.

[0016] Figure 2 This is a schematic diagram of the gear counting structure of a high-precision rotary vane water meter according to this application.

[0017] Figure 3 yes Figure 1 Cross-sectional view at point AA.

[0018] Figure 4 yes Figure 3 A magnified view of point A in the middle.

[0019] Figure 5 This is a partial view of the internal structure of a high-precision rotary vane water meter according to this application.

[0020] Figure 6 This is a structural view of the impeller box of a high-precision rotary water meter according to this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Outer casing; 11. Mounting cavity; 111. Positioning ring; 12. Inlet pipe; 13. Outlet pipe; 2. Impeller; 21. Central shaft; 22. Rotating blade; 3. Impeller box; 31. Baffle; 4. Gear set; 5. Counter; 6. Stop block; 61. Compression spring; 62. Inclined ramp; 7. Locking assembly; 71. Locking disc; 72. Locking pin; 73. Crossbar; 74. Tension spring; 8. Pressure regulating valve. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0023] This application discloses a high-precision rotary vane water meter.

[0024] Reference Figure 1 and Figure 2 A high-precision rotary vane water meter includes a housing 1 and an impeller 2 rotatably disposed inside the housing 1. The housing 1 includes a hollow mounting cavity 11 and an inlet pipe 12 and an outlet pipe 13 located at opposite ends of the mounting cavity 11, both of which communicate with the mounting cavity 11. An impeller box 3 with several through holes evenly spaced along its circumferential direction is disposed within the mounting cavity 11, and the impeller 2 is rotatably disposed within the impeller box 3. A gear set 4 is connected to the upper end of the mounting cavity 11, and the gear set 4 is driven by a counter 5 used to count the water flow rate.

[0025] When water enters the water meter through the inlet pipe 12, a portion of it passes through the through hole and enters the impeller box 3 under the influence of water flow. At this time, driven by the water flow, the impeller 2 rotates, driving the gear set 4 to work. Finally, the gear set 4, through transmission, replaces the rotation effect of the impeller 2 with a value that can be displayed by the counter 5 to help the user read the value.

[0026] It should be noted that the gear set 4 converts the rotation of the impeller 2 into the reading of the counter 5 through the transmission ratio between the gears. This is clear and achievable from the perspective of those skilled in the art. Therefore, this application will not describe the structure of the gear set 4 in more detail here.

[0027] Reference Figure 1 andFigure 3 Preferably, a regulating valve is embedded in the inlet pipe 12 or the outlet pipe 13 to regulate the air pressure in the mounting cavity 11, so as to ensure that the speed of the water does not decrease during the flow process, thereby affecting the water meter counting result.

[0028] Reference Figure 3 and Figure 4 Furthermore, a stop 6 is slidably disposed within the mounting cavity 11 near the water inlet pipe 12 to seal the water inlet pipe 12. The stop 6 is connected to a compression spring 61 to ensure that the water inlet pipe 12 is in a closed state under normal conditions, thus isolating foreign objects and keeping the internal structure of the water meter clean. The impeller 2 includes a central shaft 21 and several rotating blades 22 integrally connected circumferentially to the side wall of the central shaft 21, and a locking assembly 7 is fitted on the central shaft 21 to restrict the rotation of the impeller 2.

[0029] Reference Figure 4 The locking component 7 is used to lock the rotation of the impeller 2 immediately after the water flows through the water meter, preventing it from rotating under inertia and causing the counter 5 to change its reading, which would ultimately lead to counting errors.

[0030] Specifically, the locking assembly 7 includes a locking disc 71 movably sleeved on the central shaft 21 and several locking pins 72 equally spaced and connected to the side of the locking disc 71 near the rotating blade 22. At least one locking pin 72 should be between any two adjacent rotating blades 22 to ensure that the locking pins 72 can smoothly restrict the rotation of the impeller 2. A crossbar 73 is connected to the side of the locking disc 71 away from the locking pins 72, and the other end of the crossbar 73 is fixedly connected to the stop block 6. When the stop block 6 is lifted by the water flow, it will cause the crossbar 73 and the locking disc 71 to rise together.

[0031] Under these conditions, a gap will be created between the tip of the rotating blade 22 and the locking disc 71 along the axial direction. At this time, water can flow normally into the water meter, and the water flow can also drive the impeller 2 to rotate, realizing flow counting under normal conditions.

[0032] To make the present application clearer, when the stop block 6 closes the water inlet pipe 12, several locking pins 72 are located below the top of the impeller 2 along the axial direction, so as to restrict the rotation of the impeller 2.

[0033] Reference Figure 4 and Figure 5Preferably, to make the locking assembly 7 react more quickly and produce a locking effect immediately, a positioning ring 111 is designed inside the mounting cavity 11, with its bottom side and the top of the rotating blade 22 on the same horizontal plane. A tension spring 74 connected to the locking disc 71 on the other side is installed on the positioning ring 111. The function of this structure is to add a reset structure to the locking disc 71, so that the parts on the locking assembly 7 are subjected to more even force, and at the same time, the locking pin 72 reacts more quickly to the action of restricting the rotating blade 22.

[0034] Reference Figure 3 and Figure 5 Furthermore, the bottom of the stop block 6 near the water inlet pipe 12 is provided with a ramp 62, and the material density of the stop block 6 is less than that of water. This structure allows water to impact the stop block 6 more smoothly, and the buoyancy generated by the stop block 6 when there is water flow inside the water meter can counteract the elastic effect of the compression spring 61. This allows the water meter to still count the flow rate even when the water flow is small, thereby improving the accuracy and precision of the water meter's counting.

[0035] Reference Figure 6 Each impeller box 3 has a baffle 31 integrally connected to the same side of several through holes for blocking the through holes, and the extension direction of the baffle 31 is the same as the water flow direction. There is a radial gap between the far end of the baffle 31 and the impeller box 3.

[0036] During the flow of water from the inlet pipe 12 to the outlet pipe 13, this structure allows a portion of the water to smoothly enter the impeller box 3. When the water flows in the opposite direction, it first impacts the baffle 31 and then slowly flows into the impeller box 3, thus preventing the impeller 2 from rotating and effectively avoiding incorrect counting results during reverse flow.

[0037] The implementation principle of a high-precision rotary vane water meter according to an embodiment of this application is as follows:

[0038] The basic principle of this application is to use the stop block 6 set at the inlet of the water meter inlet pipe 12 to drive the locking component 7, thereby limiting the rotation of the impeller 2 and eliminating the error caused by the inertial rotation of the impeller 2 to the counting result.

[0039] In normal operation, water flows into the water meter from the inlet pipe 12 and pushes open the baffle 6. At this time, the baffle 6 moves upward and drives the locking disc 71 and the locking pin 72 located on the locking disc 71. The locking pin 72 moves above the rotating blade 22, and the rotating blade 22 can rotate normally and is driven by the water flow entering the impeller box 3, so that the water meter starts counting.

[0040] When the water flow stops, the stop block 6, under the action of the compression spring 61, closes the water inlet pipe 12, thus isolating foreign objects. Furthermore, under the combined action of the compression spring 61 and the tension spring 74, several locking pins 72 will immediately insert between two adjacent rotating blades 22, effectively preventing the inertial rotation of the rotating blades 22 and eliminating counting errors.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision rotary vane water meter, comprising a housing (1) and an impeller (2) rotatably disposed inside the housing (1), the housing (1) comprising a hollow mounting cavity (11) and an inlet pipe (12) and an outlet pipe (13) respectively located at both ends of the mounting cavity (11), an impeller box (3) with several through holes circumferentially provided inside the mounting cavity (11), the impeller (2) being installed inside the impeller box (3), a gear set (4) being connected to the mounting cavity (11), the gear set (4) being driven by a counter (5) for counting, characterized in that: A stop (6) that can close the water inlet pipe (12) is slidably disposed in the mounting cavity (11) near the water inlet pipe (12). The stop (6) is connected to a compression spring (61). The impeller (2) includes a central shaft (21) and a plurality of rotating blades (22) that are circumferentially spaced on the side wall of the central shaft (21). A locking assembly (7) that can lock the rotation of the impeller (2) is slidably sleeved on the central shaft (21). The locking assembly (7) is convexly connected to the stop (6). When there is no water flow in the water inlet pipe (12), the stop (6) closes the water inlet pipe (12), and the locking assembly (7) restricts the rotation of the impeller (2).

2. The high-precision rotary vane water meter according to claim 1, characterized in that: The locking assembly (7) includes a locking disc (71) slidably sleeved on the central shaft (21) and a plurality of locking pins (72) spaced apart and connected to the side of the locking disc (71) near the rotating blade (22). There is at least one locking pin (72) between two adjacent rotating blades (22). A crossbar (73) is connected to the side of the locking disc (71) away from the locking pins (72). The other end of the crossbar (73) is connected and fixed to the stop block (6). When the stop block (6) rises, there is a gap between the plurality of locking pins (72) along the axial direction and the end of the plurality of rotating blades (22) near the locking disc (71).

3. A high-precision rotary vane water meter according to claim 2, characterized in that: The mounting cavity (11) is provided with a positioning ring (111) whose bottom side is located on the same plane as the end of the rotating blade (22) along the axis of the central shaft (21). A tension spring (74) is installed on the positioning ring (111), and the other end of the tension spring (74) is connected to the locking disc (71).

4. A high-precision rotary vane water meter according to claim 3, characterized in that: The baffle (6) has a ramp (62) on the side close to the water inlet pipe (12), and the ramp (62) is located at the lower end of the baffle (6). The material density of the baffle (6) is less than the density of the water liquid.

5. A high-precision rotary vane water meter according to claim 1, characterized in that: A baffle (31) is integrally connected to the impeller box (3) on the same side of the several through holes. The several baffles (31) extend in the same direction as the water flow and completely cover the through holes. There is a radial gap between the other end of the several baffles (31) away from the impeller box (3) and the impeller box (3).

6. A high-precision rotary vane water meter according to claim 1, characterized in that: A pressure regulating valve (8) for adjusting the air pressure balance in the mounting cavity (11) is embedded in the water inlet pipe (12) or the water outlet pipe (13).

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