Flow self-adapting adjusting mechanism, flow calibration method and water meter

Abstract

The application provides a flow self-adaptive adjusting mechanism, a flow calibration method and a water meter, and relates to the technical field of water meters.The flow self-adaptive adjusting mechanism is characterized in that: a vane wheel transmission member is rotationally connected in a vane wheel box, and the vane wheel transmission member is used for being rotationally connected with a flow metering meter head; the vane wheel box is provided with a through-flow port; the vane wheel transmission member is driven to rotate by liquid flow passing through the through-flow port and impacting the vane wheel transmission member; a diaphragm spring is connected to the vane wheel box, and the diaphragm spring is deformed to increase with the increase of flow passing through the through-flow port; an adjusting member is installed between the diaphragm spring and the vane wheel transmission member, and is used for driving the vane wheel transmission member to axially move with the change of flow passing through the through-flow port; the axial movement of the vane wheel transmission member is realized with the increase and decrease of flow, and then the action position of water flow impacting the vane wheel transmission member can be adaptively changed; thus, the flow performance self-adaptive adjusting changing with the increase and decrease of flow is formed, and the accuracy of flow metering can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water meters, and in particular to a flow self-adaptive adjusting mechanism, a flow calibration method and a water meter. BACKGROUND

[0002] A water meter usually needs to be calibrated and flow performance improved before leaving the factory, and the flow performance is usually adjusted by adjusting the flux of the medium. However, since the water meter needs to be applicable to a wide flow range, the flow performance in a small flow state is quite different from that in a large flow state, which leads to difficulty in balancing the metering accuracy of large and small flows. SUMMARY

[0003] The present application aims to provide a flow self-adaptive adjusting mechanism, a flow calibration method and a water meter to realize self-adaptive adjustment of flow performance with the increase and decrease of flow.

[0004] In a first aspect, the present application provides a flow self-adaptive adjusting mechanism, comprising: an impeller box, an impeller transmission member, a diaphragm spring and an adjusting member.

[0005] The impeller transmission member is rotationally connected in the impeller box, and the impeller transmission member is used to be rotationally connected with a flow metering meter head.

[0006] The impeller box is provided with a through-flow port, and the impeller transmission member is driven to rotate by a liquid flow passing through the through-flow port and impacting the impeller transmission member.

[0007] The diaphragm spring is connected to the impeller box, and the diaphragm spring is deformed to increase with the increase of flow passing through the through-flow port.

[0008] The adjusting member is installed between the diaphragm spring and the impeller transmission member, and is used to drive the impeller transmission member to move axially with the change of flow passing through the through-flow port.

[0009] In combination with the first aspect, the present application provides a first possible implementation manner of the first aspect, wherein the through-flow port comprises a plurality of lower flow passages and a plurality of upper flow passages.

[0010] The plurality of lower flow passages are arranged at intervals around the impeller transmission member.

[0011] The position of the upper flow passage is higher than that of the lower flow passage, and the plurality of upper flow passages are arranged at intervals around the impeller transmission member.

[0012] In combination with the first possible implementation manner of the first aspect, the present application provides a second possible implementation manner of the first aspect, wherein in the natural rebound state of the diaphragm spring, the upper edge of the lower flow passage is higher than the lower edge of the blade of the impeller transmission member, and the lower edge of the upper flow passage is lower than the upper edge of the blade of the impeller transmission member.

[0013] In combination with the first possible implementation manner of the first aspect, the present application provides a third possible implementation manner of the first aspect, wherein the plurality of lower flow passages and the plurality of upper flow passages are inclined along the circumference of the impeller transmission member from inside to outside, the plurality of lower flow passages have the same inclination direction, the plurality of upper flow passages have the same inclination direction, and the inclination direction of the lower flow passages is opposite to the inclination direction of the upper flow passages.

[0014] In combination with the first aspect, the present application provides a fourth possible implementation manner of the first aspect, wherein the diaphragm spring has a body portion and a plurality of spring leaf portions connected to the body portion.

[0015] The plurality of spring leaf portions are integrally formed with the body portion, and the plurality of spring leaf portions are arranged along the circumference of the body portion and respectively extend towards the vicinity of the axis of the body portion.

[0016] The diaphragm spring is mounted at the bottom of the impeller box, and the plurality of spring leaf portions respectively abut against the adjusting member.

[0017] In the natural rebound state, the plurality of spring leaf portions are inclined along the radial line pointing to the axis of the body portion and away from the impeller transmission member.

[0018] In combination with the fourth possible implementation manner of the first aspect, the present application provides a fifth possible implementation manner of the first aspect, wherein the adjusting member is provided with a snap ring groove, and the plurality of spring leaf portions respectively abut against the snap ring groove.

[0019] In combination with the first aspect, the present application provides a sixth possible implementation manner of the first aspect, wherein the diaphragm spring is connected with the impeller box through a fastener, and the fastener is used to adjust the initial deformation amount of the diaphragm spring.

[0020] The second aspect of the present application provides a flow calibration method using the flow self-adaptive adjusting mechanism of the first aspect, and the method comprises the following steps:

[0021] A plurality of flow test points are set, and the actual rotating speed of the impeller transmission member under the condition of each flow test point is simulated and tested respectively;

[0022] The error between the actual rotating speed of the impeller transmission member and the theoretical rotating speed of the impeller transmission member is compared;

[0023] Adjusting the diaphragm spring and / or the adjusting member until the error meets a preset error range.

[0024] In combination with the second aspect, the flow calibration method further comprises:

[0025] Adjusting the diaphragm spring and / or the adjusting member to change the initial position of the impeller transmission member;

[0026] Drawing an error curve according to the test errors of the respective flow test points.

[0027] In a third aspect, the water meter is equipped with the flow adaptive adjustment mechanism according to the first aspect.

[0028] The embodiment of the present application has the following beneficial effects: the impeller transmission member is rotationally connected in the impeller box, and the impeller transmission member is used for transmission connection with the flow metering meter head, the impeller box is provided with a through-flow port, the impeller transmission member is driven to rotate by the liquid flow passing through the through-flow port and impacting the impeller transmission member, the diaphragm spring is connected to the impeller box, and the diaphragm spring is deformed to increase with the increase of the flow passing through the through-flow port, the adjusting member is installed between the diaphragm spring and the impeller transmission member, and is used to drive the impeller transmission member to move axially with the change of the flow passing through the through-flow port, the axial movement of the impeller transmission member is realized with the increase and decrease of the flow, and then the acting position of the water flow impacting the impeller transmission member can be adaptively changed, thereby forming the flow performance adaptive adjustment changing with the increase and decrease of the flow, and the accuracy of flow metering can be improved.

[0029] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, a preferred embodiment is described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art, the drawings needed to be used in the specific embodiments or the related art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0031] Figure 1 A cross-sectional view of the flow adaptive adjustment mechanism provided by the embodiment of the present application;

[0032] Figure 2 A schematic view of the flow adaptive adjustment mechanism provided by the embodiment of the present application;

[0033] Figure 3 A schematic view of the impeller box of the flow adaptive adjustment mechanism provided by the embodiment of the present application;

[0034] Figure 4A schematic view of a diaphragm spring of the flow self-adaptive adjusting mechanism provided by the embodiment of the present application;

[0035] Figure 5 A partial enlarged view of the cooperation between the adjusting member and the spring sheet part of the flow self-adaptive adjusting mechanism provided by the embodiment of the present application;

[0036] Figure 6 An error curve diagram drawn according to the test errors of each flow test point in the flow calibration method provided by the embodiment of the present application.

[0037] Icon: 100 - impeller box; 110 - through-flow port; 111 - lower flow passage port; 112 - upper flow passage port; 200 - impeller transmission member; 300 - diaphragm spring; 310 - body part; 320 - spring sheet part; 400 - adjusting member; 401 - snap ring groove; 410 - column sleeve; 420 - rod member; 430 - pointed head; 500 - fastener. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, such as without separate marking, should be understood as basic quantities of International System of Units, or derived quantities derived from basic quantities by mathematical operations such as multiplication, division, differentiation or integration.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] AsFigure 1 、 Figure 2 and Figure 3 As shown in FIGS. 1 to 4, the flow self-adaptive adjusting mechanism provided by the embodiment of the present application comprises a vane box 100, a vane transmission member 200, a diaphragm spring 300 and an adjusting member 400. The vane transmission member 200 is rotationally connected in the vane box 100 and is used to be rotationally connected with a flow meter head. The vane box 100 is provided with a through-flow port 110, and the vane transmission member 200 is driven to rotate by the liquid flow through the through-flow port 110 and impacting the vane transmission member 200. The diaphragm spring 300 is connected with the vane box 100, and the diaphragm spring 300 is deformed to increase with the increase of the flow through the through-flow port 110. The adjusting member 400 is installed between the diaphragm spring 300 and the vane transmission member 200, and is used to drive the vane transmission member 200 to move axially with the change of the flow through the through-flow port 110.

[0042] Specifically, the diaphragm spring 300 is installed at the bottom of the vane box 100, and in the natural rebound state, the diaphragm spring 300 protrudes or inclines downward, so as to make the adjusting member 400 move downward along the axial direction of the vane transmission member 200, and at this time, the vane transmission member 200 is located at the lowest position in the axial stroke. With the increase of the flow rate, the fluid impact can force the diaphragm spring 300 to elastically deform, and the greater the flow rate, the greater the deformation of the diaphragm spring 300, and the adjusting member 400 rises accordingly and lifts the vane transmission member 200, so as to realize the self-adaptive adjustment of the axial position of the vane transmission member 200 with the increase and decrease of the flow, and by changing the position of the vane transmission member 200 relative to the through-flow port 110, the position and intensity of the water flow impact are changed, and thus the adjustment of the flow performance is realized.

[0043] In the embodiment of the present application, the through-flow port 110 comprises a plurality of lower flow channel ports 111 and a plurality of upper flow channel ports 112. The plurality of lower flow channel ports 111 are arranged at intervals around the vane transmission member 200. The position of the upper flow channel port 112 is higher than that of the lower flow channel port 111, and the plurality of upper flow channel ports 112 are arranged at intervals around the vane transmission member 200.

[0044] In the natural rebound state of the diaphragm spring 300, the upper edge of the lower flow channel port 111 is higher than the lower edge of the blade of the vane transmission member 200, and the lower edge of the upper flow channel port 112 is lower than the upper edge of the blade of the vane transmission member 200. With the increase and decrease of the flow, the vane transmission member 200 moves up and down along the axial direction, and the liquid flow acting on the vane transmission member 200 through the lower flow channel port 111 and the upper flow channel port 112 changes accordingly, so as to better reflect the position control ability of the vane transmission member 200 on the flow performance.

[0045] The plurality of lower flow passage openings 111 and the plurality of upper flow passage openings 112 are inclined along the circumferential direction of the impeller driving member 200 from the inside to the outside, the plurality of lower flow passage openings 111 have the same inclination direction, the plurality of upper flow passage openings 112 have the same inclination direction, and the inclination direction of the lower flow passage openings 111 is opposite to the inclination direction of the upper flow passage openings 112. As the impeller driving member 200 moves up and down along the axial direction, the flow of the liquid acting on the impeller driving member 200 through the lower flow passage openings 111 and the upper flow passage openings 112 changes accordingly, and the circumferential force acting on the impeller driving member 200 under the same flow condition is different, thereby reflecting the flow performance difference under different flow conditions.

[0046] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the diaphragm spring 300 has a body portion 310 and a plurality of spring leaf portions 320 connected to the body portion 310; the plurality of spring leaf portions 320 are integrally formed with the body portion 310, and the plurality of spring leaf portions 320 are arranged in the circumferential direction of the body portion 310 and extend towards the axis of the body portion 310; the diaphragm spring 300 is installed at the bottom of the impeller box 100, and the plurality of spring leaf portions 320 abut against the adjusting member 400; in the natural rebound state, the plurality of spring leaf portions 320 are inclined in the radial direction towards the axis of the body portion 310 and away from the impeller driving member 200.

[0047] In this embodiment, the adjusting member 400 is provided with a snap ring groove 401, and the plurality of spring leaf portions 320 abut against the snap ring groove 401.

[0048] In addition, the adjusting member 400 can include a column sleeve 410, a rod member 420 and a sharp head 430, the column sleeve 410 passes through the bottom of the impeller box 100, and the snap ring groove 401 extending in the circumferential direction is arranged outside the column sleeve 410; the rod member 420 is connected between the column sleeve 410 and the sharp head 430, and the sharp head 430 lifts the impeller driving member 200. The column sleeve 410 and the rod member 420 can be threadedly connected to adjust the axial size of the adjusting member 400, so as to adjust the height position of the impeller driving member 200 in the initial state.

[0049] As shown in Figure 1 and Figure 2 , the diaphragm spring 300 and the impeller box 100 are connected by a fastener 500, and the initial deformation amount of the diaphragm spring 300 can be adjusted by the fastener 500, in other words, the compression force of the fastener 500 on the diaphragm spring 300 can be increased by locking the fastener 500, and the diaphragm spring 300 is forced to be deformed in the initial state, and the position of the impeller driving member 200 is lifted accordingly.

[0050] As shown in Figure 1 and Figure 2As shown, the flow calibration method provided by the embodiment of the present application adopts the flow self-adaptive adjusting mechanism described in the above embodiments, and comprises the following steps: setting a plurality of flow test points, and respectively simulating the actual rotating speed of the impeller transmission member 200 under the condition of each flow test point; comparing the error between the actual rotating speed of the impeller transmission member 200 and the theoretical rotating speed of the impeller transmission member 200; adjusting the diaphragm spring 300 and / or the adjusting member 400 until the error meets the preset error range.

[0051] The following data record table can be obtained through experimental test:

[0052] Q1 (15.625 L / h) Q2 (25 L / h) Q3 (2500 L / h) Theoretical speed (rpm) 7.72 12.36 1235.83 Impeller original position speed (rpm) 6.90 11.28 998.92 Impeller 0.5 mm down speed (rpm) 7.01 11.33 1018.57 Impeller 0.5 mm up speed (rpm) 6.78 10.98 951.58 Impeller original position error (%) -10.67 -8.73 -19.17 Impeller 0.5 mm down error (%) -9.24 -8.33 -17.58 Impeller 0.5 mm up error (%) -12.22 -11.19 -23.00

[0053] In the embodiment of the present application, the flow calibration method further comprises: adjusting the diaphragm spring 300 and / or the adjusting member 400 to change the initial position of the impeller transmission member 200; referring to Figure 6 , drawing an error curve according to the test error of each flow test point.

[0054] Wherein, adjusting the diaphragm spring 300 refers to adjusting the initial installation form of the diaphragm spring 300, or replacing the diaphragm spring 300 of different sizes; the adjusting member 400 can be adjusted in length, or replaced by an adjusting member 400 of different length. Whether one of the diaphragm spring 300 and the adjusting member 400 is adjusted, or the diaphragm spring 300 and the adjusting member 400 are respectively adjusted, the initial position of the impeller transmission member 200 can be adjusted.

[0055] In addition, simulation software can also be used to simulate and analyze the flow performance corresponding to the position of the impeller transmission member 200. By comparing the flow velocity nephogram of the impeller transmission member 200 after lifting or lowering, the influence degree of the lifting or lowering of the impeller transmission member 200 by a certain distance on the flow performance can be obtained.

[0056] The water meter provided by the embodiment of the present application is equipped with the flow self-adaptive adjusting mechanism described in the above embodiments, and can be adjusted in flow performance by using the above flow calibration method. The water meter has the technical effects of the flow self-adaptive adjusting mechanism, which will not be described here.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flow self-adapting regulation mechanism, characterized in that, The utility model relates to a flow meter, comprising: A vane box (100), a vane transmission (200), a diaphragm spring (300) and an adjusting member (400); The vane transmission (200) is rotationally connected in the vane box (100), and the vane transmission (200) is used for transmission connection with a flow meter head; The vane box (100) is provided with a through-flow port (110), and the vane transmission (200) is driven to rotate by the liquid flow through the through-flow port (110) and impacting the vane transmission (200); The diaphragm spring (300) is connected to the vane box (100), and the diaphragm spring (300) is deformed to increase with the increase of the flow through the through-flow port (110); The adjusting member (400) is installed between the diaphragm spring (300) and the vane transmission (200), and drives the vane transmission (200) to move axially with the change of the flow through the through-flow port (110).

2. The flow self-adapting regulation mechanism of claim 1, wherein, The through-flow port (110) comprises a plurality of lower flow channel ports (111) and a plurality of upper flow channel ports (112); A plurality of the lower flow channel ports (111) are arranged at intervals around the vane transmission (200); The upper flow channel ports (112) are higher than the lower flow channel ports (111), and a plurality of the upper flow channel ports (112) are arranged at intervals around the vane transmission (200).

3. The flow self-adapting regulation mechanism of claim 2, wherein, In the natural rebound state of the diaphragm spring (300), the upper edge of the lower flow channel port (111) is higher than the lower edge of the vane of the vane transmission (200), and the lower edge of the upper flow channel port (112) is lower than the upper edge of the vane of the vane transmission (200).

4. The flow self-adapting regulation mechanism according to claim 2 or 3, characterized in that, A plurality of the lower flow channel ports (111) and a plurality of the upper flow channel ports (112) are inclined from inside to outside along the circumference of the vane transmission (200), the inclination directions of a plurality of the lower flow channel ports (111) are the same, the inclination directions of a plurality of the upper flow channel ports (112) are the same, and the inclination direction of the lower flow channel port (111) is opposite to the inclination direction of the upper flow channel port (112).

5. The flow self-adapting regulation mechanism of claim 1, wherein, The diaphragm spring (300) has a body portion (310) and a plurality of spring leaf portions (320) connected to the body portion (310); A plurality of the spring leaf portions (320) are integrally formed with the body portion (310), and a plurality of the spring leaf portions (320) are arranged at intervals along the circumference of the body portion (310) and respectively extend towards the axis of the body portion (310); The diaphragm spring (300) is installed at the bottom of the vane box (100), and a plurality of the spring leaf portions (320) respectively abut against the adjusting member (400); In the natural rebound state, a plurality of the spring leaf portions (320) are inclined along the radial line pointing to the axis of the body portion (310) and away from the vane transmission (200).

6. The flow self-adapting regulation mechanism of claim 5, wherein, The adjusting member (400) is provided with a snap ring groove (401), and a plurality of the spring leaf portions (320) respectively abut in the snap ring groove (401).

7. The flow self-adapting regulation mechanism of claim 1, wherein, The diaphragm spring (300) is connected with the impeller box (100) through a fastener (500) used to adjust the initial deformation of the diaphragm spring (300).

8. A method of flow calibration, characterized by, The flow calibration method adopts the flow self-adaptive adjusting mechanism according to any one of claims 1-7, and comprises the following steps: A plurality of flow test points are set, and the actual rotating speed of the impeller transmission member (200) under each flow test point is simulated respectively; The error between the actual rotating speed of the impeller transmission member (200) and the theoretical rotating speed of the impeller transmission member (200) is compared; The diaphragm spring (300) and / or the adjusting member (400) are adjusted until the error meets the preset error range.

9. The method of flow calibration of claim 8, wherein, The flow calibration method further comprises: The diaphragm spring (300) and / or the adjusting member (400) are adjusted to change the initial position of the impeller transmission member (200); An error curve is drawn according to the test error of each flow test point.

10. A water meter characterized by The water meter is equipped with the flow self-adaptive adjusting mechanism according to any one of claims 1-7.

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