Flow regulating structure of large-diameter water meter movement

Abstract

This utility model provides a flow regulation structure for a large-diameter water meter movement, belonging to the field of water meter technology. It solves the problem of improving the detection accuracy of water meters. In this flow regulation structure for a large-diameter water meter movement, the large-diameter water meter includes an impeller box and an impeller rotatably connected within the impeller box. The flow regulation structure of the movement includes a fixed regulating plate and a movable regulating plate, both located on one side of the impeller. The fixed regulating plate is fixed within the impeller box, and the movable regulating plate is connected to the impeller box and can swing and be positioned relative to the axial direction of the impeller. The fixed regulating plate and the movable regulating plate are spaced apart circumferentially along the impeller box. This flow regulation structure for a large-diameter water meter movement can improve the detection accuracy of the water meter.

Description

Technical Field

[0001] This utility model belongs to the field of water meter technology and relates to a flow regulation structure for a large-diameter water meter movement. Background Technology

[0002] Water meters, especially speed-type water meters, are very common water metering devices in modern life. They often use the flow of water to drive the impeller connected inside the impeller box to rotate. The rotating impeller, the mechanism and the metering mechanism work together to achieve accurate measurement of water consumption.

[0003] In existing technologies, the flow rate levels during water meter testing are generally divided into four levels: minimum flow rate, boundary flow rate, normal flow rate (nominal flow rate), and overload flow rate. Among these, the boundary flow rate, as the critical point for error partitioning when transitioning from the low to the high flow rate range, exhibits the most significant error fluctuations. Specifically, due to factors such as mechanical friction of parts, tilted installation of the water meter, or sudden pressure changes in the pipeline, the meter's movement may measure water usage too quickly or too slowly, leading to inaccurate water consumption detection by the metering agency. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a flow regulation structure for a large-diameter water meter movement. The technical problem this utility model aims to solve is: how to improve the detection accuracy of water meters.

[0005] The objective of this utility model can be achieved through the following technical solution: a flow regulation structure for a large-diameter water meter mechanism, the large-diameter water meter including an impeller box and an impeller rotatably connected inside the impeller box, characterized in that the flow regulation structure of the mechanism includes a fixed regulating plate and a movable regulating plate, the fixed regulating plate and the movable regulating plate are both located on one side of the impeller, the fixed regulating plate is fixed inside the impeller box, the movable regulating plate is connected to the impeller box and can swing and be positioned relative to the axial direction of the impeller, and the fixed regulating plate and the movable regulating plate are spaced apart along the circumference of the impeller box.

[0006] This application utilizes an impeller box as a carrier, and assembles a fixed adjustment plate and a movable adjustment plate inside the impeller box. Specifically, both the fixed and movable adjustment plates are located on the side where the water flow enters the impeller, and are spaced apart along the circumference of the impeller box. It should be noted that the fixed adjustment plate disclosed in this application remains in a fixed position on one side of the impeller after installation, serving as a reference for correcting the water flow passing through the impeller. When the water meter's detection error is small, the fixed adjustment plate can adaptively adjust the measurement error. Furthermore, the movable adjustment plate installed in this application can be manually adjusted after installation, allowing it to swing clockwise or counterclockwise relative to the impeller's axis within the impeller box. After the swing adjustment is completed and the position is maintained, when the water meter's detection error is small, the operator can adjust the moving adjustment plate to the same posture as the fixed adjustment plate. The moving and fixed adjustment plates work together to guide the input water flow, thereby achieving adaptive adjustment to the measurement error. When the measurement error is biased towards a positive value and the error amount is large, the moving adjustment plate can be rotated counterclockwise so that the tilt of the moving adjustment plate is greater than that of the fixed adjustment plate. The moving and fixed adjustment plates are used to guide the input water flow, thereby correcting the positive deviation. Conversely, when the measurement error is biased towards a negative value and the error is large, the moving adjustment plate can be rotated clockwise so that the tilt of the moving adjustment plate is less than that of the fixed adjustment plate, thereby correcting the negative deviation. This ensures that the water meter's measurement deviation can be kept within the specified range, effectively improving the water meter's detection accuracy.

[0007] In the flow regulation structure of the large-diameter water meter mechanism described above, a connecting shaft is provided radially along one side of the impeller inside the impeller box. The inner end of the connecting shaft is rotatably connected to the impeller box, and the outer end of the connecting shaft extends out of the impeller box. The movable adjustment plate is connected to the inner end of the connecting shaft and is circumferentially positioned with the connecting shaft. As a specific solution, this application provides a connecting shaft in the impeller box and connects and fixes the movable adjustment plate to the inner end of the connecting shaft. When adjustment is required, the outer end of the connecting shaft is rotated, causing the inner end of the connecting shaft to drive the movable adjustment plate to swing clockwise or counterclockwise, thereby adjusting the tilt angle of the movable adjustment plate to guide the water flow.

[0008] In the flow regulation structure of the large-diameter water meter mechanism described above, the inner end of the connecting shaft has a planar limiting surface on its side wall, and the limiting surface is arranged along the axial direction of the connecting shaft. The moving adjustment plate has a locking hole radially formed along the impeller. The inner end of the connecting shaft passes through the locking hole, and its outer peripheral wall is in contact with the inner peripheral wall of the locking hole. By utilizing the fitting between the limiting surface at the inner end of the connecting shaft and the inner wall of the locking hole on the moving adjustment plate, circumferential positioning of the moving adjustment plate on the connecting shaft is achieved, preventing the moving adjustment plate from being pushed and rotating relative to the connecting shaft when impacted by water flow.

[0009] In the flow regulation structure of the large-diameter water meter mechanism described above, a cover plate is fixed to the top of the impeller box. A stepped hole is provided on the cover plate, and the outer end of the connecting shaft passes through the stepped hole, with its end abutting against the stepped surface of the hole. Through the cooperation of the cover plate and the impeller box, the stepped hole accommodates the outer end of the connecting shaft, maintaining its radial positioning at both ends. Furthermore, the stepped surface of the hole supports and lifts the outer end of the connecting shaft, thereby limiting its axial movement.

[0010] In the flow regulation structure of the large-diameter water meter mechanism described above, a connecting shaft II is fixed inside the impeller box on one side of the impeller, arranged radially along the impeller. The outer wall of the connecting shaft II has a planar limiting surface II, which is arranged axially along the connecting shaft II. A locking hole II is provided on the fixed adjustment plate radially along the impeller. The connecting shaft II passes through the locking hole II, and its outer peripheral wall is in contact with the inner peripheral wall of the locking hole II. Specifically, the fixed adjustment plate is connected and positioned in the impeller box via the connecting shaft II, allowing it to be positioned on one side of the impeller. Furthermore, the inner wall of the locking hole II in the fixed adjustment plate cooperates with the limiting surface II on the outer wall of the connecting shaft II, thereby achieving circumferential positioning of the fixed adjustment plate on the connecting shaft II and preventing the fixed adjustment plate from rotating relative to the connecting shaft II when subjected to the impact of water flow.

[0011] Compared with existing technologies, the flow regulation structure of this large-diameter water meter mechanism has the following advantages: By assembling a fixed adjustment plate and a moving adjustment plate located on one side of the impeller inside the impeller box, the moving adjustment plate can be rotated to adjust its own posture according to different measurement error conditions, and cooperate with the fixed adjustment plate to adaptively guide the input water flow, thereby correcting the deviation in water meter measurement and effectively improving the detection accuracy of the water meter. Attached Figure Description

[0012] Figure 1 This is a side view of the flow regulation structure of this large-diameter water meter movement.

[0013] Figure 2 yes Figure 1 A sectional view taken along the AA direction.

[0014] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0015] Figure 4 This is a structural schematic diagram of connecting shaft one.

[0016] Figure 5 This is a schematic diagram of the moving adjustment plate.

[0017] Figure 6 This is a structural schematic diagram of connecting shaft two.

[0018] Figure 7 This is a schematic diagram of the fixed adjustment plate.

[0019] In the figure, 1 is the impeller box; 11 is the impeller; 12 is the connecting shaft 1; 121 is the limiting surface 1; 13 is the cover plate; 131 is the step hole; 14 is the connecting shaft 2; 141 is the limiting surface 2; 2 is the fixed adjusting plate; 21 is the snap-fit ​​hole 2; 3 is the moving adjusting plate; 31 is the snap-fit ​​hole 1. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 1 and Figure 2 As shown, in the flow regulation structure of this large-diameter water meter mechanism, the large-diameter water meter includes an impeller box 1 and an impeller 11 rotatably connected in the impeller box 1. A cover plate 13 is fixed to the top of the impeller box 1, as shown. Figure 2 As shown, the flow regulation structure of the mechanism includes a fixed regulating plate 2 and a moving regulating plate 3, both of which are set inside the impeller box 1. The moving regulating plate 3 and the fixed regulating plate 2 are both located on one side of the impeller 11, and the moving regulating plate 3 and the fixed regulating plate 2 are arranged at intervals along the circumference of the impeller box 1.

[0022] Combination Figure 6 and Figure 7A connecting shaft 14 is provided inside the impeller box 1 and on one side of the impeller 11. Notably, an impeller cover for installing a ejector pin is formed in the impeller box 1. An inner mating hole 2 is formed on the outer wall of the impeller cover, and an outer mating hole 2 is formed on the inner wall of the impeller box 1. One end of the connecting shaft 14 is embedded in the inner mating hole 2, and the other end is embedded in the outer mating hole 2. The outer wall of the connecting shaft 14 has a planar limiting surface 141. There are two limiting surfaces 141, which are arranged at intervals along the circumference of the connecting shaft 14, and each limiting surface 141 is arranged along the axial direction of the connecting shaft 14. The fixed adjustment plate 2 has a snap-fit ​​hole 21 radially opened on the impeller 11. The connecting shaft 14 passes through the snap-fit ​​hole 21 and its outer peripheral wall abuts against the inner peripheral wall of the snap-fit ​​hole 21. By utilizing the abutting fit between the limiting surface 241 and the inner wall of the snap-fit ​​hole 21, the fixed adjustment plate 2 is circumferentially positioned on the connecting shaft 14, and one end face of the fixed adjustment plate 2 is set close to the impeller 11. It is worth mentioning that the outer mating hole 2 is an irregular hole. One end of the connecting shaft 14 is mated with the inner wall of the outer mating hole 2 through the limiting surface 241, thereby achieving circumferential positioning of the connecting shaft 14.

[0023] Combination Figure 3-5Inside the impeller box 1 and on one side of the impeller 11, there is a connecting shaft 12. Connecting shaft 12 and connecting shaft 14 are spaced apart along the circumference of the impeller box 1. An inner mating hole 1 is provided on the outer wall of the impeller cover, and an outer mating hole 1 is provided on the inner wall of the impeller box 1. The inner end of connecting shaft 12 has a column protruding from its end face. Connecting shaft 12 is inserted into the inner mating hole 1 through the column and allows connecting shaft 12 to rotate circumferentially. The outer end of connecting shaft 12 extends out of the impeller box 1 through the outer mating hole 1. A stepped hole 131 is provided on the cover plate 13. The outer end of connecting shaft 12 passes through the stepped hole 131 and the end and the step are aligned. When installing the connecting shaft 12, the stepped surface of the hole 131 abuts against the connecting shaft 12, specifically inserting it from the outside in. This allows the inner end of the connecting shaft 12 to pass through the stepped hole 131 and the outer mating hole in sequence and be inserted into the inner mating hole. The outer end of the connecting shaft 12 abuts against the stepped surface of the stepped hole 131. In addition, a flange protrusion is formed on the end face of the outer end of the connecting shaft 12 for use with a flathead screwdriver. A ring-shaped pressure cap is installed in the stepped hole 131 by snap-fit ​​or screw-fit. After the pressure cap is screwed in place, it is fitted over the flange protrusion at the outer end of the connecting shaft 12, thereby keeping the connecting shaft 12 in a radial position along the impeller 11. The inner end of the connecting shaft 12 has a planar limiting surface 121 on its outer wall. There are two limiting surfaces 121, which are arranged circumferentially along the connecting shaft 12. Each limiting surface 121 is arranged axially along the connecting shaft 12. The moving adjusting plate 3 has a snap-fit ​​hole 31 radially along the impeller 11. The connecting shaft 12 passes through the snap-fit ​​hole 31 and its outer peripheral wall abuts against the inner peripheral wall of the snap-fit ​​hole 31. By using the abutting fit between each limiting surface 121 and the inner wall of the snap-fit ​​hole 31, the moving adjusting plate 3 is circumferentially positioned on the connecting shaft 12, and one end face of the moving adjusting plate 3 is set close to the impeller 11.

[0024] Operating principle: After assembling the water meter, the fixed adjustment plate 2 and the moving adjustment plate 3 are aligned, with one end of each facing the impeller 11. This is primarily to address small-range errors in water meter readings. The fixed and moving adjustment plates 2 and 3 pre-guide the input water flow to reduce the impact of the water flow on the impeller 11, thus adaptively adjusting for measurement errors. When the measurement error is positive and large, a screwdriver can be inserted into the stepped hole 131 and the outer end of the connecting shaft 12 can be turned counterclockwise. This causes the moving adjustment plate 3 to rotate counterclockwise, tilting it. When the angle of inclination of the moving adjustment plate 3 is greater than that of the fixed adjustment plate 2, the moving adjustment plate 3 is the primary guide for the input water flow, with the fixed adjustment plate 2 as the secondary guide, thereby correcting the positive deviation. Conversely, when the measurement error is negative and large, a screwdriver can be inserted into the stepped hole 131 and the outer end of the connecting shaft 12 can be turned clockwise. This causes the moving adjustment plate 3 to rotate clockwise, making its inclination less than that of the fixed adjustment plate 2. The moving adjustment plate 3 is the primary guide for the input water flow, with the fixed adjustment plate 2 as the secondary guide, thereby correcting the negative deviation. This ensures that the measurement deviation of the water meter can be kept within the specified range, effectively improving the accuracy of the water meter.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as impeller box 1, impeller 11, connecting shaft 12, limiting surface 121, cover plate 13, stepped hole 131, connecting shaft 14, limiting surface 141, fixed adjusting plate 2, snap-fit ​​hole 21, moving adjusting plate 3, and snap-fit ​​hole 31, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A flow regulation structure for a large-diameter water meter movement, the large-diameter water meter comprising an impeller box (1) and an impeller (11) rotatably connected within the impeller box (1), characterized in that, The flow regulation structure of the mechanism includes a fixed regulating plate (2) and a moving regulating plate (3). The fixed regulating plate (2) and the moving regulating plate (3) are both located on one side of the impeller (11). The fixed regulating plate (2) is fixed inside the impeller box (1). The moving regulating plate (3) is connected to the impeller box (1) and can swing and be positioned relative to the axial direction of the impeller (11). The fixed regulating plate (2) and the moving regulating plate (3) are spaced apart along the circumference of the impeller box (1).

2. The flow regulation structure of the large-diameter water meter movement according to claim 1, characterized in that, Inside the impeller box (1), a connecting shaft (12) is provided radially along one side of the impeller (11). The inner end of the connecting shaft (12) is rotatably connected to the impeller box (1), and the outer end of the connecting shaft (12) extends out of the impeller box (1). The movable adjusting plate (3) is connected to the inner end of the connecting shaft (12) and is circumferentially positioned with respect to the connecting shaft (12).

3. The flow regulation structure of the large-diameter water meter movement according to claim 2, characterized in that, The inner end of the connecting shaft (12) has a planar limiting surface (121) on its side wall, and the limiting surface (121) is arranged along the axial direction of the connecting shaft (12). The moving adjustment plate (3) has a snap-fit ​​hole (31) radially along the impeller (11). The inner end of the connecting shaft (12) passes through the snap-fit ​​hole (31) and its outer peripheral wall is in contact with the inner peripheral wall of the snap-fit ​​hole (31).

4. The flow regulation structure of the large-diameter water meter movement according to claim 2 or 3, characterized in that, The impeller box (1) is fixed with a cover plate (13) on top. The cover plate (13) has a stepped hole (131). The outer end of the connecting shaft (12) passes through the stepped hole (131) and its end abuts against the stepped surface of the stepped hole (131).

5. The flow regulation structure of the large-diameter water meter movement according to claim 4, characterized in that, Inside the impeller box (1), a connecting shaft two (14) is fixed on one side of the impeller (11) and arranged radially along the impeller (11). The outer wall of the connecting shaft two (14) has a planar limiting surface two (141) and the limiting surface two (141) is arranged axially along the connecting shaft two (14). The fixed adjustment plate (2) has a snap-fit ​​hole two (21) radially along the impeller (11). The connecting shaft two (14) passes through the snap-fit ​​hole two (21) and its outer peripheral wall is in contact with the inner peripheral wall of the snap-fit ​​hole two (21).

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