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

Abstract

The invention provides a flow self-adaptive adjusting mechanism, a flow calibration method and a water meter, and relates to the technical field of watermeters.According to the flow self-adaptive adjusting mechanism, an impeller transmission part is rotationally connected into an impeller box, the impeller transmission part is used for being in transmission connection with a flow meter head, and the impeller box is provided with a through-flow opening; liquid flow which flows through the through-flow opening and impacts the impeller transmission part drives the impeller transmission part to rotate, the diaphragm spring is connected to the impeller box, deformation of the diaphragm spring is increased along with increase of flow flowing through the through-flow opening, and the adjusting part is installed between the diaphragm spring and the impeller transmission part. The impeller transmission part is used for driving the impeller transmission part to axially move along with the change of the flow flowing through the through-flow opening, so that the axial movement of the impeller transmission part along with the increase and decrease of the flow is realized, the acting position of the impeller transmission part impacted by the water flow can be adaptively changed, the flow performance self-adaptive adjustment along with the increase and decrease of the flow is formed, and the flow metering accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water meters, and in particular to a flow self-adapting regulating mechanism, a flow calibration method and a water meter. Background Art

[0002] Water meters usually need to be calibrated and adjusted to improve flow performance before leaving the factory, usually by adjusting the medium flux. However, since water meters need to be applicable to a wider flow range, the flow performance under a smaller flow state is quite different from that under a larger flow state, which makes it difficult for water meters to take into account the measurement accuracy of both large and small flows. Summary of the invention

[0003] The object of the present invention is to provide a flow adaptive regulation mechanism, a flow calibration method and a water meter, so as to realize adaptive regulation of flow performance as the flow increases or decreases.

[0004] In a first aspect, the present invention provides a flow adaptive adjustment mechanism, comprising: an impeller box, an impeller transmission member, a diaphragm spring and an adjustment member;

[0005] The impeller transmission member is rotatably connected in the impeller box, and the impeller transmission member is used for transmission connection with the flow meter head;

[0006] The impeller box is provided with a flow opening, and the impeller transmission member is driven to rotate by the liquid flow flowing through the flow opening and impacting the impeller transmission member;

[0007] The diaphragm spring is connected to the impeller box, and the deformation of the diaphragm spring increases as the flow rate flowing through the flow port increases;

[0008] The regulating member is installed between the diaphragm spring and the impeller transmission member, and is used to drive the impeller transmission member to move axially as the flow rate flowing through the flow port changes.

[0009] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the flow opening includes a plurality of downflow openings and a plurality of upflow openings;

[0010] A plurality of the downflow openings are arranged at intervals around the impeller transmission member;

[0011] The position of the upper flow channel opening is higher than the lower flow channel opening, and a plurality of the upper flow channel openings are arranged at intervals around the impeller transmission member.

[0012] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein, when the diaphragm spring naturally rebounds, the upper edge of the downflow port is higher than the lower edge of the blade of the impeller transmission component, and the lower edge of the upflow port is lower than the upper edge of the blade of the impeller transmission component.

[0013] In combination with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the multiple downflow openings and the multiple upflow openings are all inclined from the inside to the outside along the circumference of the impeller transmission component, the multiple downflow openings have the same inclination direction, the multiple upflow openings have the same inclination direction, and the inclination direction of the downflow openings is opposite to the inclination direction of the upflow openings.

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

[0015] The plurality of spring pieces are integrally formed with the main body, and the plurality of spring pieces are spaced apart along the circumference of the main body and extend toward the axis of the main body respectively;

[0016] The diaphragm spring is installed at the bottom of the impeller box, and the plurality of spring pieces abut against the adjusting member respectively;

[0017] In a state of natural rebound, the plurality of elastic sheet portions are inclined along a radial line pointing to the axis of the main body portion in a direction away from the impeller transmission member.

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

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

[0020] In a second aspect, the flow calibration method provided by the present invention adopts the flow adaptive adjustment mechanism described in the first aspect, and comprises the following steps:

[0021] Setting a plurality of flow test points, and simulating the actual rotation speed of the impeller transmission member under the conditions of each flow test point;

[0022] comparing the error between the actual rotation speed of the impeller transmission component and the theoretical rotation speed of the impeller transmission component;

[0023] The diaphragm spring and / or the adjusting member are adjusted until the error satisfies a preset error range.

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

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

[0026] The error curve is drawn according to the experimental error of each flow test point.

[0027] In a third aspect, the water meter provided by the present invention is equipped with the flow adaptive regulation mechanism recorded in the first aspect.

[0028] The embodiments of the present invention bring the following beneficial effects: an impeller transmission member is rotatably connected to the impeller box, and the impeller transmission member is used for transmission connection with the flow meter head, the impeller box is provided with a flow port, and the impeller transmission member is driven to rotate by the liquid flow flowing through the flow port and impacting the impeller transmission member, the diaphragm spring is connected to the impeller box, and the diaphragm spring deforms more as the flow through the flow port increases, and the adjusting member is installed between the diaphragm spring and the impeller transmission member to drive the axial movement of the impeller transmission member as the flow through the flow port changes, thereby realizing the axial movement of the impeller transmission member as the flow rate increases or decreases, and then the position of the water flow impacting the impeller transmission member can be adaptively changed, thereby forming an adaptive adjustment of the flow performance that changes with the increase or decrease of the flow rate, and can improve the accuracy of flow measurement.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A cross-sectional view of a flow adaptive regulation mechanism provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of a flow rate adaptive regulation mechanism provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of an impeller box of a flow adaptive regulation mechanism provided in an embodiment of the present invention;

[0034] Figure 4A schematic diagram of a diaphragm spring of a flow adaptive regulation mechanism provided by an embodiment of the present invention;

[0035] Figure 5 A partial enlarged schematic diagram of the cooperation between the regulating member and the spring piece portion of the flow adaptive regulating mechanism provided in an embodiment of the present invention;

[0036] Figure 6 The error curve diagram is drawn according to the test error of each flow test point in the flow calibration method provided in the embodiment of the present invention.

[0037] Icons: 100 - impeller box; 110 - flow port; 111 - downflow port; 112 - upflow port; 200 - impeller transmission part; 300 - diaphragm spring; 310 - main body; 320 - spring part; 400 - adjustment part; 401 - retaining ring groove; 410 - column sleeve; 420 - rod; 430 - pointed head; 500 - fastener. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the flow adaptive adjustment mechanism provided by the embodiment of the present invention includes: an impeller box 100, an impeller transmission member 200, a diaphragm spring 300 and an adjusting member 400; the impeller transmission member 200 is rotatably connected in the impeller box 100, and the impeller transmission member 200 is used for transmission connection with the flow meter head; the impeller box 100 is provided with a flow port 110, and the impeller transmission member 200 is driven to rotate by the liquid flow flowing through the flow port 110 and impacting the impeller transmission member 200; the diaphragm spring 300 is connected to the impeller box 100, and the diaphragm spring 300 increases in deformation as the flow rate flowing through the flow port 110 increases; the adjusting member 400 is installed between the diaphragm spring 300 and the impeller transmission member 200, and is used to drive the impeller transmission member 200 to move axially as the flow rate flowing through the flow port 110 changes.

[0042] Specifically, the diaphragm spring 300 is installed at the bottom of the impeller box 100. In the natural rebound state, the diaphragm spring 300 bulges or tilts downward to make the adjustment member 400 move downward along the axial direction of the impeller transmission member 200. At this time, the impeller transmission member 200 is located at the lowest position within the axial stroke. As the flow rate increases, the fluid impact can force the diaphragm spring 300 to deform elastically. The greater the flow rate, the greater the deformation of the diaphragm spring 300, and the adjustment member 400 rises accordingly, and lifts the impeller transmission member 200, thereby realizing the adaptive adjustment of the axial position of the impeller transmission member 200 with the increase or decrease of the flow rate. By changing the position of the impeller transmission member 200 relative to the flow port 110, the position and strength of the water flow impact are changed, thereby realizing the adjustment of the flow performance.

[0043] In an embodiment of the present invention, the flow port 110 includes a plurality of downflow ports 111 and a plurality of upflow ports 112; the plurality of downflow ports 111 are arranged at intervals around the impeller transmission component 200; the position of the upflow port 112 is higher than the downflow port 111, and the plurality of upflow ports 112 are arranged at intervals around the impeller transmission component 200.

[0044] When the diaphragm spring 300 naturally rebounds, the upper edge of the downstream channel opening 111 is higher than the lower edge of the blade of the impeller transmission component 200, and the lower edge of the upstream channel opening 112 is lower than the upper edge of the blade of the impeller transmission component 200. As the flow rate increases or decreases, the impeller transmission component 200 moves up and down axially, and the liquid flow acting on the impeller transmission component 200 through the downstream channel opening 111 and the upstream channel opening 112 increases or decreases accordingly, which can better reflect the ability of the position of the impeller transmission component 200 to regulate the flow performance.

[0045] The multiple downflow openings 111 and the multiple upflow openings 112 are all inclined from the inside to the outside along the circumference of the impeller transmission member 200, and the inclination direction of the multiple downflow openings 111 is the same, and the inclination direction of the multiple upflow openings 112 is the same, and the inclination direction of the downflow openings 111 is opposite to the inclination direction of the upflow openings 112. As the impeller transmission member 200 moves up and down along the axial direction, the liquid flow acting on the impeller transmission member 200 through the downflow openings 111 and the upflow openings 112 increases and decreases accordingly, and the circumferential force acting on the impeller transmission member 200 under the same flow state forms a difference, which can be reflected as a difference in flow performance for different flow rate conditions.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the diaphragm spring 300 has a main body 310 and a plurality of spring pieces 320 connected to the main body 310; the plurality of spring pieces 320 are integrally formed with the main body 310, and the plurality of spring pieces 320 are arranged at intervals along the circumference of the main body 310 and respectively extend toward the axis of the main body 310; the diaphragm spring 300 is installed at the bottom of the impeller box 100, and the plurality of spring pieces 320 respectively abut against the adjusting member 400; in the state of natural rebound, the plurality of spring pieces 320 are inclined along the radial line pointing to the axis of the main body 310 in a direction away from the impeller transmission member 200.

[0047] In this embodiment, the adjusting member 400 is provided with a snap ring groove 401 , and the plurality of spring pieces 320 are respectively abutted against the snap ring grooves 401 .

[0048] In addition, the adjusting member 400 may include: a column sleeve 410, a rod 420 and a pointed head 430. The column sleeve 410 passes through the bottom of the impeller box 100, and a circumferentially extending snap ring groove 401 is provided on the outer side of the column sleeve 410; the rod 420 is connected between the column sleeve 410 and the pointed head 430, and the impeller transmission member 200 is lifted by the pointed head 430. The column sleeve 410 and the rod 420 can be threadedly matched to adjust the axial size of the adjusting member 400, so that the height position of the impeller transmission member 200 in the initial state can be adjusted.

[0049] like Figure 1 and Figure 2 As shown, the diaphragm spring 300 is connected to the impeller box 100 via a fastener 500, and the initial deformation of the diaphragm spring 300 can be adjusted via the fastener 500. In other words, the clamping force of the fastener 500 on the diaphragm spring 300 can be increased by locking the fastener 500, thereby forcing the diaphragm spring 300 to be squeezed and deformed in the initial state and the position of the impeller transmission component 200 to rise accordingly.

[0050] like Figure 1 and Figure 2As shown, the flow calibration method provided in an embodiment of the present invention adopts the flow adaptive adjustment mechanism recorded in the above-mentioned implementation mode, and includes the following steps: setting multiple flow test points, and simulating the actual rotation speed of the impeller transmission member 200 under the conditions of each flow test point; comparing the error between the actual rotation speed of the impeller transmission member 200 and the theoretical rotation speed of the impeller transmission member 200; adjusting the diaphragm spring 300 and / or the adjustment member 400 until the error meets the preset error range.

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

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

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

[0054] Among them, adjusting the diaphragm spring 300 refers to adjusting the initial installation form of the diaphragm spring 300, or replacing the diaphragm spring 300 with a different size and model; the adjusting member 400 can be adjusted in length, or replaced with a different length and size of the adjusting member 400. Regardless of adjusting one of the diaphragm spring 300 and the adjusting member 400, or adjusting the diaphragm spring 300 and the adjusting member 400 separately, the initial position of the impeller transmission member 200 can be adjusted.

[0055] In addition, simulation software can be used to simulate and analyze the flow performance corresponding to the position of the impeller transmission component 200. By comparing the flow velocity cloud diagram after the impeller transmission component 200 is raised or lowered, the degree of influence of the impeller transmission component 200 rising or falling a certain distance on the flow performance can be known.

[0056] The water meter provided in the embodiment of the present invention is equipped with the flow adaptive regulation mechanism described in the above implementation mode, and can use the above flow calibration method to adjust the flow performance. The water meter has the technical effect of the flow adaptive regulation mechanism, which will not be repeated here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow adaptive regulation mechanism, It is characterized in that include: An impeller box (100), an impeller transmission member (200), a diaphragm spring (300) and an adjusting member (400); The impeller transmission member (200) is rotatably connected in the impeller box (100), and the impeller transmission member (200) is used for transmission connection with a flow meter head; The impeller box (100) is provided with a flow port (110), and the impeller transmission component (200) is driven to rotate by a liquid flow that flows through the flow port (110) and impacts the impeller transmission component (200); The diaphragm spring (300) is connected to the impeller box (100), and the deformation of the diaphragm spring (300) increases as the flow rate flowing through the flow port (110) increases; The adjusting member (400) is installed between the diaphragm spring (300) and the impeller transmission member (200) to drive the impeller transmission member (200) to move axially as the flow rate flowing through the flow port (110) changes.

2. The flow rate adaptive adjustment mechanism according to claim 1, It is characterized in that The flow opening (110) comprises a plurality of downflow openings (111) and a plurality of upflow openings (112); A plurality of the downflow openings (111) are arranged at intervals around the impeller transmission member (200); The position of the upper flow channel opening (112) is higher than that of the lower flow channel opening (111), and a plurality of the upper flow channel openings (112) are arranged at intervals around the impeller transmission component (200).

3. The flow rate adaptive adjustment mechanism according to claim 2, It is characterized in that When the diaphragm spring (300) is in a state of natural rebound, the upper edge of the lower flow channel opening (111) is higher than the lower edge of the blade of the impeller transmission component (200), and the lower edge of the upper flow channel opening (112) is lower than the upper edge of the blade of the impeller transmission component (200).

4. The flow adaptive regulation mechanism according to claim 2 or 3, It is characterized in that The plurality of downflow openings (111) and the plurality of upflow openings (112) are all inclined from the inside to the outside along the circumference of the impeller transmission component (200), the plurality of downflow openings (111) have the same inclination direction, the plurality of upflow openings (112) have the same inclination direction, and the inclination direction of the downflow openings (111) is opposite to the inclination direction of the upflow openings (112).

5. The flow rate adaptive adjustment mechanism according to claim 1, It is characterized in that The diaphragm spring (300) comprises a main body portion (310) and a plurality of spring leaf portions (320) connected to the main body portion (310); The plurality of spring pieces (320) are integrally formed with the main body (310), and the plurality of spring pieces (320) are arranged at intervals along the circumference of the main body (310) and extend toward a position close to the axis of the main body (310); The diaphragm spring (300) is installed at the bottom of the impeller box (100), and the plurality of spring pieces (320) respectively abut against the adjusting member (400); In a state of natural rebound, the plurality of elastic sheet portions (320) are inclined in a direction away from the impeller transmission component (200) along a radial line pointing to the axis of the main body portion (310).

6. The flow rate adaptive adjustment mechanism according to claim 5, It is characterized in that The adjusting member (400) is provided with a snap ring groove (401), and the plurality of spring sheet portions (320) are respectively abutted against the snap ring groove (401).

7. The flow rate adaptive adjustment mechanism according to claim 1, It is characterized in that The diaphragm spring (300) is connected to the impeller box (100) via a fastener (500), and the fastener (500) is used to adjust the initial deformation amount of the diaphragm spring (300).

8. A flow calibration method, It is characterized in that The flow calibration method adopts the flow adaptive adjustment mechanism according to any one of claims 1 to 7, and comprises the following steps: Setting a plurality of flow rate test points, and simulating the actual rotation speed of the impeller transmission member (200) under the conditions of each flow rate test point; comparing an error between an actual rotation speed of the impeller transmission component (200) and a theoretical rotation speed of the impeller transmission component (200); The diaphragm spring (300) and / or the adjusting member (400) are adjusted until the error satisfies a preset error range.

9. The flow calibration method according to claim 8, It is characterized in that 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); The error curve is drawn according to the experimental error of each flow test point.

10. A water meter, It is characterized in that The water meter is equipped with the flow adaptive regulation mechanism according to any one of claims 1 to 7.

Images