CN110686733A - Stainless steel water meter shell and water meter - Google Patents

Stainless steel water meter shell and water meter Download PDF

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Publication number
CN110686733A
CN110686733A CN201910977775.7A CN201910977775A CN110686733A CN 110686733 A CN110686733 A CN 110686733A CN 201910977775 A CN201910977775 A CN 201910977775A CN 110686733 A CN110686733 A CN 110686733A
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core
water
meter
water meter
watch core
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CN110686733B (en
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严军荣
卢玉龙
江雅芬
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Yingtan Daopu Intelligent Technology Co ltd
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Hangzhou Qian Bo Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a stainless steel water meter shell and a water meter, wherein a meter core accommodating cavity is arranged on a water meter shell body, one end of the meter core accommodating cavity is provided with a water inlet end, and the other end of the meter core accommodating cavity is provided with a water outlet end; the watch core accommodating cavity is divided into a watch core lower accommodating cavity and a watch core upper accommodating cavity; the lower containing cavity of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity of the watch core is used for containing the water outlet part of the impeller box of the watch core, the pointer and the dial; the water inlet end is positioned in the meter core lower accommodating cavity at the opening of the meter core accommodating cavity, and the water outlet end and the opening of the meter core accommodating cavity are positioned in the meter core upper accommodating cavity; the method is characterized in that: the internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core, the difference that holds the chamber internal diameter under the watch core and hold the chamber internal diameter on the watch core is D1, D1 value sets up according to the pressure that water gauge type, water gauge bore and impeller box screens structure width. The invention solves the problems of complex manufacturing process, high cost, water retention and the like of the existing water meter shell.

Description

Stainless steel water meter shell and water meter
Technical Field
The invention belongs to the technical field of water meters, and particularly relates to a stainless steel water meter shell and a water meter.
Background
The water meter is applied to flow measurement in the fields of tap water, industrial water and the like. The common water meter comprises a shell, a sleeve and an inner core, wherein the shell is mainly divided into a water inlet end, a meter core accommodating cavity and a water outlet end, and a fixing structure for fixing the meter core is arranged in the meter core accommodating cavity. For example, in a water meter case disclosed in chinese patent publication No. CN102138062B and a process for manufacturing the same (as shown in fig. 1), a support ring 6 is provided in an inner cavity for receiving a meter core, or the middle of the case is in a ring-shaped concave shape, so that a boss for receiving the meter core is formed in the middle of the inner cavity. In a stainless steel water meter case fitting, a method of manufacturing the same, a stainless steel water meter case, and a water meter (as shown in fig. 2) disclosed in chinese patent publication No. CN108917872A, an inner ring 2 is provided in a meter core accommodating chamber for accommodating a meter core, and the inner ring 2 is a separately cast component and is welded to a middle portion of the meter core accommodating chamber.
The water meter realizes the function of placing or fixing the meter core by welding a separate fixing structure (a support ring or an inner ring) or arranging an annular convex structure in the water meter, but the manufacturing and welding of the fixing structure or the arrangement of the annular convex structure can cause high process complexity and high manufacturing cost of the water meter.
In addition, the water meter has the following four problems: (1) because the water flow firstly enters the lower space of the shell and then enters the water inlet part of the impeller box, the lower space of the shell has a dead angle which can retain water, the metering precision of the water meter can be influenced, and the water retained for a long time even can influence the water quality; (2) in the prior art, a slope diversion structure is adopted during diversion, and the front impact of water flow on an impeller can interfere the water flow, so that the impact of the water flow on the impeller is dispersed, and the metering sensitivity and accuracy of the water meter are reduced; (3) in the prior art, a watch core is placed through a fixed structure (a support ring or an inner ring) or an annular convex structure, so that the watch core cannot be prevented from rotating in a watch core accommodating cavity under the influence of water flow impact or external force; (4) in the prior art, factors such as the type of the water meter, the bearing pressure of the water meter, the metering precision of the water meter, the water flow and the like are not considered in the sizes and relative relations of all parts.
Disclosure of Invention
In order to solve the problems of the existing water meter, the invention provides a stainless steel water meter shell and a water meter.
The invention provides a stainless steel water meter shell which comprises a water meter shell body, wherein the water meter shell body is provided with a meter core accommodating cavity, one end of the meter core accommodating cavity is provided with a water inlet end, and the other end of the meter core accommodating cavity is provided with a water outlet end; the watch core accommodating cavity is divided into a watch core lower accommodating cavity and a watch core upper accommodating cavity; the lower containing cavity of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity of the watch core is used for containing the water outlet part of the impeller box of the watch core, the pointer and the dial; the water inlet end is positioned in the meter core lower accommodating cavity at the opening of the meter core accommodating cavity, and the water outlet end and the opening of the meter core accommodating cavity are positioned in the meter core upper accommodating cavity; the method is characterized in that: the internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core, the difference that holds the chamber internal diameter under the watch core and hold the chamber internal diameter on the watch core is D1, D1 value sets up according to the pressure that water gauge type, water gauge bore and impeller box screens structure width.
Optionally, the junction that holds the chamber under the watch core and hold the chamber on the watch core sets up sawtooth structure or screw thread structure or dull polish structure arbitrary for increase the watch core and hold the chamber under and hold the laminating degree of chamber junction and watch core on the watch core, prevent that the watch core from receiving the rivers impact and taking place to rotate.
Optionally, the difference between the accommodating inner diameter of the lower accommodating cavity of the watch core and the outer diameter of the water inlet part of the impeller box of the watch core is D2; the difference between the inner diameter of the accommodating cavity on the watch core and the outer diameters of the impeller box water outlet part, the pointer and the dial of the watch core is D3; and the D2 value and the D3 value are set according to the type of the water meter and the precision of the water meter. The higher the metering accuracy of the water meter is, the smaller the D2 value and/or the D3 value are.
Optionally, a transverse flow deflector and/or a longitudinal flow deflector are arranged at an opening between the water inlet end and the watch core lower accommodating cavity, the transverse flow deflector is used for guiding water flow to the lower side of the watch core lower accommodating cavity and then to enter the watch core, and the longitudinal flow deflector is used for guiding water flow to the left side or the right side of the watch core lower accommodating cavity and then to enter the watch core; the included angle between the transverse flow deflector and the horizontal plane is alpha 1, the included angle between the longitudinal flow deflector and the vertical plane is alpha 2, and the alpha 1 value and the alpha 2 value are set according to the type of the water meter, the average water flow and the accuracy of the water meter.
Optionally, an anti-backflow baffle is arranged at an opening between the water outlet end and the accommodating cavity on the watch core; the transverse included angle between the backflow prevention baffle and the water meter is beta, and the beta value is set according to the type of the water meter, the average water flow and the accuracy of the water meter.
Optionally, the junction of the water inlet end and the watch core lower accommodating cavity is in arc transition, and is used for relieving the interference of water flow when the water flow is guided into the watch core.
A water meter having a stainless steel water meter case comprising a water meter case and a meter core disposed inside the water meter case, wherein the water meter case and the meter core are mounted in the positions as described above.
The installation state of the water meter comprises an installation state that the dial of the meter core is upward, an installation state that the dial of the meter core is downward, an installation state that the dial of the meter core is vertical or an installation state that the dial of the meter core is inclined. Wherein the impeller of the watch core is connected with the water inlet part of the impeller box through a movable connecting device, and the movable connecting device is used for preventing the impeller from sliding up and down.
The method and the system have the advantages that:
(1) compared with the existing water meter shell manufacturing process, the structure for placing the meter core, such as a supporting ring or an inner ring or an annular convex structure, is eliminated, so that the manufacturing process is simplified, and the manufacturing cost is reduced.
(2) The watch core holds the chamber and divide into under the watch core and hold the chamber on the watch core and the watch core internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core from bottom to top, is convenient for lay and fixed watch core, avoids the watch core slippage.
(3) The joint of the containing cavity under the watch core and the containing cavity on the watch core is provided with a sawtooth structure, a thread structure, a frosted structure and the like, so that the displacement caused by external force after the watch core is installed or the rotation caused by water flow impact can be effectively prevented.
(4) The impeller box water inlet part and the water outlet part of the watch core are tightly arranged in the watch core accommodating cavity, so that dead angles of retained water are reduced, and the influence of water retention on metering precision can be reduced.
(5) Through setting up the left side or the right side water conservancy diversion piece of leading rivers to impeller box portion below of intaking, can increase the impact force of rivers to the impeller, improve the sensitivity and the degree of accuracy of rivers measurement.
(6) The junction that holds the chamber under water inlet end and the core is the arc transition, can effectively alleviate the interference to rivers when rivers leading-in core.
(7) The parameters of the water meter are set according to factors such as the type of the water meter, the pressure born by the water meter, the metering precision of the water meter, the water flow and the like, so that the method can adapt to different water meter application environments.
Drawings
Fig. 1 is a schematic view of a water meter case structure of chinese patent publication No. CN102138062B in the background of the invention;
fig. 2 is a schematic view of a water meter case structure of chinese patent publication No. CN108917872A in the background of the invention;
FIG. 3 is a schematic longitudinal sectional view of a stainless steel water gauge case according to a first embodiment of the present invention;
FIG. 4 is a schematic view of a cross-sectional flow path of a water meter in accordance with an embodiment of the present invention;
fig. 5 is a schematic longitudinal sectional view of a water meter case having a screw thread at a junction of a core receiving cavity according to a second embodiment of the present invention;
FIG. 6 is a schematic longitudinal sectional view of a stainless steel water meter case with a longitudinal flow deflector according to a third embodiment of the present invention;
fig. 7 is a horizontal cross-sectional view of a stainless steel water meter case with a longitudinal flow deflector according to a third embodiment of the present invention.
Detailed Description
The following describes in detail preferred embodiments of the present invention.
Example one, a stainless steel water meter case.
The stainless steel water meter shell of the embodiment has the advantages that the longitudinal cross-sectional structure schematic diagram of the shell is shown in fig. 3, the flow path schematic diagram of water flow is shown in fig. 4, wherein the dotted line with an arrow indicates the flow direction of the water flow, the stainless steel water meter shell comprises a water meter shell body, the water meter shell body is provided with a meter core accommodating cavity (1), one end of the meter core accommodating cavity is provided with a water inlet end (2), and the other end of the meter core accommodating cavity is provided with a water outlet end (; the watch core accommodating cavity (1) is divided into a watch core lower accommodating cavity (11) and a watch core upper accommodating cavity (12); the lower containing cavity (11) of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity (12) of the watch core is used for containing the water outlet part of the impeller box of the watch core, a pointer and a dial; the method is characterized in that: the inner diameter of the lower containing cavity of the watch core is smaller than that of the watchThe difference between the inner diameter of the containing cavity below the meter core and the inner diameter of the containing cavity on the meter core is D1, and the D1 value is set according to the type of the water meter, the pressure born by the water meter and the width of the clamping structure of the impeller box. In this embodiment, the types of the water meters are distinguished according to the pipe diameters of the water meters, the pipe diameters are represented by a (in square centimeters), the pressure borne by the water meters is represented by f (in MPa), the width of the impeller box clamping structure is represented by b (in centimeters), and the difference D1 between the inner diameter of the containing cavity under the watch core and the inner diameter of the containing cavity on the watch core is calculated according to the pipe diameters a, the borne pressure f and the width b of the impeller box clamping structure1·a·f+k2B, wherein k is1And k2Is a weighting coefficient set in advance, k in the present embodiment1＝0.01，k 21, 50, 1.5, 2, D1 k is calculated1·a·f+k2B is 0.01 · 50 · 1.5+1 · 2 is 2.75 cm.
The opening between the water inlet end and the containing cavity below the meter core is provided with a transverse flow deflector, the transverse flow deflector is used for guiding water flow to the lower side of the containing cavity below the meter core and then enters the meter core, the included angle between the transverse flow deflector and the horizontal plane is alpha 1, and the alpha 1 value is set according to the type of the water meter, the average water flow and the precision of the water meter. In the embodiment, a transverse flow deflector (4) is arranged at an opening between the water inlet end and the lower accommodating cavity of the meter core and is used for guiding water flow to the lower side of the lower accommodating cavity of the meter core and then entering the meter core, and an included angle between the transverse flow deflector and the horizontal plane is calculated according to the type (pipe diameter a) of the water meter, the average water flow (recorded as s, and the unit is cubic meter per second) and the accuracy c (the unit is millimeter) of the water meter
Figure BDA0002234215570000051
Wherein r is1The coefficient is a coefficient for calculating the depression angle of the transverse guide vane, which is set in advance, in this embodiment r10.45, 50 for a, 1 for s, 2 for c, and the calculation
Figure BDA0002234215570000052
The angle α 1 of the transverse guide vanes to the horizontal plane is shown in fig. 3.
An anti-backflow baffle is arranged at an opening between the water outlet end and the accommodating cavity on the watch core; backflow prevention baffle and water meterThe transverse included angle is beta, and the beta value is set according to the type of the water meter, the average water flow and the precision of the water meter. In the embodiment, the opening between the water outlet end and the accommodating cavity on the meter core is provided with the anti-backflow baffle (5), and the transverse included angle between the anti-backflow baffle and the water meter is calculated according to the type (pipe diameter a) of the water meter, the average water flow (marked as s) and the precision c of the water meter
Figure BDA0002234215570000061
Where w is a calculation coefficient of the elevation angle of the anti-backflow flap, which is set in advance, in this embodiment, w is 1.2, a is 50, s is 1, and c is 2, and the calculation is performed
Figure BDA0002234215570000062
The transverse included angle between the backflow-preventing baffle and the water meter is shown in fig. 3.
Embodiment two, a stainless steel water meter case with screw thread at the junction of the core receiving cavity.
A stainless steel water meter case with a screw thread at the junction of a core accommodating cavity of the second embodiment has a longitudinal cross-sectional structure schematic diagram of the case as shown in fig. 5, wherein a dotted line with an arrow indicates the flowing direction of water flow, and the stainless steel water meter case comprises a water meter case body, wherein the water meter case body is provided with a core accommodating cavity (1), one end of the core accommodating cavity is provided with a water inlet end (2), and the other end of the core accommodating cavity is provided with a water outlet end (3); the watch core accommodating cavity (1) is divided into a watch core lower accommodating cavity (11) and a watch core upper accommodating cavity (12); the lower containing cavity (11) of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity (12) of the watch core is used for containing the water outlet part of the impeller box of the watch core, a pointer and a dial; the method is characterized in that: the internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core, the difference that holds the chamber internal diameter under the watch core and hold the chamber internal diameter on the watch core is D1, D1 value sets up according to the pressure that water gauge type, water gauge bore and impeller box screens structure width. In this embodiment, the types of the water meters are distinguished according to the pipe diameters of the water meters, the pipe diameters are represented by a (in square centimeters), the pressure borne by the water meters is represented by f (in MPa), the width of the impeller box clamping structure is represented by b (in centimeters), and the difference between the inner diameter of the containing cavity below the watch core and the inner diameter of the containing cavity above the watch core is calculated according to the pipe diameters a, the borne pressure f and the width b of the impeller box clamping structureD1＝k1·a·f+k2B, wherein k is1And k2Is a weighting coefficient set in advance, k in the present embodiment1＝0.01，k 21, 50, 1.5, 2, D1 k is calculated1·a·f+k2B is 0.01 · 50 · 1.5+1 · 2 is 2.75 cm.
The junction that holds the chamber under the watch core and hold the chamber on the watch core sets up sawtooth structure or screw thread structure or dull polish structure arbitrary for increase the watch core and hold chamber junction and the laminating degree of watch core on chamber and the watch core under and, prevent that the watch core from receiving the rivers impact and taking place the rotation. The junction that holds the chamber under the core and hold the chamber on the core sets up sawtooth structure (7) for increase the core and hold the chamber under the core and hold the joint that holds the chamber on the core and the core with the laminating degree of core, prevent that the core from receiving the rivers impact to take place to rotate.
The difference between the accommodating inner diameter of the lower accommodating cavity of the watch core and the outer diameter of the impeller box water inlet part of the watch core is D2; the difference between the inner diameter of the accommodating cavity on the watch core and the outer diameters of the impeller box water outlet part, the pointer and the dial of the watch core is D3; and the D2 value and the D3 value are set according to the type of the water meter and the precision of the water meter. In this embodiment, the measurement accuracy of the water meter is represented by c (millimeter), and the difference between the inner diameter of the lower receiving cavity of the watch core and the outer diameter of the impeller box water inlet part of the watch core is calculated according to the diameter a of the water meter and the measurement accuracy c
Figure BDA0002234215570000071
Difference between inner diameter of accommodating cavity on watch core and outer diameter of impeller box water outlet part of watch core and between pointer and dialWherein g is1And g2Is a calculation coefficient set in advance, and in the present embodiment, a calculation coefficient g is set1＝0.04，g20.04, a 50, c 2, and calculate
Figure BDA0002234215570000073
A transverse flow deflector is arranged at the opening between the water inlet end and the lower containing cavity of the watch core and used for the transverse flow deflectorThe water flow is guided to the lower side of the containing cavity under the meter core and then enters the meter core, the included angle between the transverse flow deflector and the horizontal plane is alpha 1, and the alpha 1 value is set according to the type of the water meter, the average water flow and the precision of the water meter. In the embodiment, a transverse flow deflector (4) is arranged at an opening between the water inlet end and the lower accommodating cavity of the meter core and is used for guiding water flow to the lower side of the lower accommodating cavity of the meter core and then entering the meter core, and an included angle between the transverse flow deflector and the horizontal plane is calculated according to the type (pipe diameter a) of the water meter, the average water flow (recorded as s, and the unit is cubic meter per second) and the accuracy c of the water meter
Figure BDA0002234215570000074
Wherein r is1The coefficient is a coefficient for calculating the depression angle of the transverse guide vane, which is set in advance, in this embodiment r10.45, 50 for a, 1 for s, 2 for c, and the calculation
Figure BDA0002234215570000075
The angle α 1 of the transverse guide vanes to the horizontal plane is shown in fig. 5.
An anti-backflow baffle is arranged at an opening between the water outlet end and the accommodating cavity on the watch core; the transverse included angle between the backflow prevention baffle and the water meter is beta, and the beta value is set according to the type of the water meter, the average water flow and the accuracy of the water meter. In the embodiment, the opening between the water outlet end and the accommodating cavity on the meter core is provided with the anti-backflow baffle (5), and the transverse included angle between the anti-backflow baffle and the water meter is calculated according to the type (pipe diameter a) of the water meter, the average water flow (marked as s) and the precision c of the water meter
Figure BDA0002234215570000076
Where w is a calculation coefficient of the elevation angle of the anti-backflow flap, which is set in advance, in this embodiment, w is 1.2, a is 50, s is 1, and c is 2, and the calculation is performed
Figure BDA0002234215570000081
The transverse included angle between the backflow-preventing baffle and the water meter is shown in fig. 5.
Example three, a stainless steel water meter case with longitudinal baffles.
The stainless steel water meter shell with the longitudinal flow deflectors of the embodiment comprisesThe longitudinal cross-sectional structure schematic diagram of the meter shell is shown in fig. 6, and the meter shell comprises a meter shell body, wherein the meter shell body is provided with a meter core accommodating cavity (1), one end of the meter core accommodating cavity is provided with a water inlet end (2), and the other end of the meter core accommodating cavity is provided with a water outlet end (3); the watch core accommodating cavity (1) is divided into a watch core lower accommodating cavity (11) and a watch core upper accommodating cavity (12); the lower containing cavity (11) of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity (12) of the watch core is used for containing the water outlet part of the impeller box of the watch core, a pointer and a dial; the method is characterized in that: the internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core, the difference that holds the chamber internal diameter under the watch core and hold the chamber internal diameter on the watch core is D1, D1 value sets up according to the pressure that water gauge type, water gauge bore and impeller box screens structure width. In this embodiment, the types of the water meters are distinguished according to the pipe diameters of the water meters, the pipe diameters are represented by a (in square centimeters), the pressure borne by the water meters is represented by f (in MPa), the width of the impeller box clamping structure is represented by b (in centimeters), and the difference D1 between the inner diameter of the containing cavity under the watch core and the inner diameter of the containing cavity on the watch core is calculated according to the pipe diameters a, the borne pressure f and the width b of the impeller box clamping structure1·a·f+k2B, wherein k is1And k2Is a weighting coefficient set in advance, k in the present embodiment1＝0.01，k 21, 50, 1.5, 2, D1 k is calculated1·a·f+k2B is 0.01 · 50 · 1.5+1 · 2 is 2.75 cm.
The junction that holds the chamber under the watch core and hold the chamber on the watch core sets up sawtooth structure or screw thread structure or dull polish structure arbitrary for increase the watch core and hold chamber junction and the laminating degree of watch core on chamber and the watch core under and, prevent that the watch core from receiving the rivers impact and taking place the rotation. The junction that holds the chamber under the core and hold the chamber on the core sets up sawtooth structure (7) for increase the core and hold the chamber under the core and hold the joint that holds the chamber on the core and the core with the laminating degree of core, prevent that the core from receiving the rivers impact to take place to rotate.
The difference between the accommodating inner diameter of the lower accommodating cavity of the watch core and the outer diameter of the impeller box water inlet part of the watch core is D2; the difference between the inner diameter of the accommodating cavity on the watch core and the outer diameters of the impeller box water outlet part, the pointer and the dial of the watch core is D3; the D2 value and the D3 value are according to the water metersThe type and water meter accuracy are set. In this embodiment, the measurement accuracy of the water meter is represented by c (millimeter), and the difference between the inner diameter of the lower receiving cavity of the watch core and the outer diameter of the impeller box water inlet part of the watch core is calculated according to the diameter a of the water meter and the measurement accuracy c
Figure BDA0002234215570000091
Difference between inner diameter of accommodating cavity on watch core and outer diameter of impeller box water outlet part of watch core and between pointer and dial
Figure BDA0002234215570000092
Wherein g is1And g2Is a calculation coefficient set in advance, and in the present embodiment, a calculation coefficient g is set1＝0.04，g20.04, a 50, c 2, and calculate
Figure BDA0002234215570000093
A transverse flow deflector and a longitudinal flow deflector are arranged at an opening between the water inlet end and the lower accommodating cavity of the watch core, the transverse flow deflector is used for guiding water flow to the lower side of the lower accommodating cavity of the watch core and then enters the watch core, and the longitudinal flow deflector is used for guiding water flow to the left side or the right side of the lower accommodating cavity of the watch core and then enters the watch core; the included angle between the transverse flow deflector and the horizontal plane is alpha 1, the included angle between the longitudinal flow deflector and the vertical plane is alpha 2, and the alpha 1 value and the alpha 2 value are set according to the type of the water meter, the average water flow and the accuracy of the water meter. In the embodiment, a transverse flow deflector (4) and a longitudinal flow deflector (5) are arranged at an opening between a water inlet end and a containing cavity below the meter core, the transverse flow deflector is used for guiding water flow to the lower side of the containing cavity below the meter core and then to enter the meter core, the longitudinal flow deflector is used for guiding water flow to the left side or the right side of the containing cavity below the meter core and then to enter the meter core, and an included angle between the transverse flow deflector and the horizontal plane is calculated according to the type (pipe diameter a) of the water meter, the average water flow (recorded as s, the unit is cubic meter/second) and the precision c of the
Figure BDA0002234215570000094
Wherein r is1The coefficient is a coefficient for calculating the depression angle of the transverse guide vane, which is set in advance, in this embodiment r1＝0.45，a＝50，s＝1，c＝2，Computing
Figure BDA0002234215570000095
Calculating the included angle between the longitudinal flow deflector and the longitudinal direction of the water meter according to the type (pipe diameter a) of the water meter, the average water flow (recorded as s, the unit is cubic meter per second) and the precision c of the water meter
Figure BDA0002234215570000096
Wherein r is2The coefficient of the offset angle of the longitudinal baffle is set in advance, and r is set in this embodiment20.3, 50 a, 1 s, 2 c, and calculate
Figure BDA0002234215570000097
The included angle α 1 between the transverse baffle and the horizontal plane is shown in fig. 6, and the included angle α 2 between the longitudinal baffle and the longitudinal direction of the water meter is shown in the horizontal cross-sectional view of the meter case of the water meter in fig. 7.
An anti-backflow baffle is arranged at an opening between the water outlet end and the accommodating cavity on the watch core; the transverse included angle between the backflow prevention baffle and the water meter is beta, and the beta value is set according to the type of the water meter, the average water flow and the accuracy of the water meter. In the embodiment, the opening between the water outlet end and the accommodating cavity on the meter core is provided with the anti-backflow baffle (5), and the transverse included angle between the anti-backflow baffle and the water meter is calculated according to the type (pipe diameter a) of the water meter, the average water flow (marked as s) and the precision c of the water meter
Figure BDA0002234215570000101
Where w is a calculation coefficient of the elevation angle of the anti-backflow flap, which is set in advance, in this embodiment, w is 1.2, a is 50, s is 1, and c is 2, and the calculation is performed
Figure BDA0002234215570000102
The transverse included angle between the backflow-preventing baffle and the water meter is shown in fig. 6.
The junction of holding the chamber under water inlet end and the watch core is the arc transition for the interference to rivers when alleviating rivers leading-in watch core. In this embodiment, the junction between the water inlet end (2) and the watch case lower accommodating cavity (11) is an arc transition, and the arc transition between the water inlet end (2) and the watch case lower accommodating cavity (11) is represented by X in fig. 6.
A water meter with a stainless steel water meter shell comprises a water meter shell and a meter core positioned in the water meter shell, and is characterized in that the water meter shell and the meter core are arranged at the same position as in the first embodiment or the second embodiment or the third embodiment.
The installation state of the water meter comprises an installation state that the dial of the meter core is upward, an installation state that the dial of the meter core is downward, an installation state that the dial of the meter core is vertical or an installation state that the dial of the meter core is inclined. Wherein the impeller of the watch core is connected with the water inlet part of the impeller box through a movable connecting device, and the movable connecting device is used for preventing the impeller from sliding up and down. In this embodiment, the impeller of the movement is connected to the water inlet portion of the impeller case by a movable connection device, so as to ensure that the water meter can be installed in a manner of an upward installation state of the movement dial, a downward installation state of the movement dial, a vertical installation state of the movement dial, or an inclined installation state of the movement dial.
Of course, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention, and not as a limitation to the present invention, and that the changes and modifications of the above embodiments will fall within the protection scope of the present invention as long as they are within the scope of the present invention.

Claims (10)

1. A stainless steel water meter shell comprises a water meter shell body, wherein the water meter shell body is provided with a meter core accommodating cavity, one end of the meter core accommodating cavity is provided with a water inlet end, and the other end of the meter core accommodating cavity is provided with a water outlet end; the watch core accommodating cavity is divided into a watch core lower accommodating cavity and a watch core upper accommodating cavity; the lower containing cavity of the watch core is used for containing the water inlet part of the impeller box of the watch core, and the upper containing cavity of the watch core is used for containing the water outlet part of the impeller box of the watch core, the pointer and the dial; the water inlet end is positioned in the meter core lower accommodating cavity at the opening of the meter core accommodating cavity, and the water outlet end and the opening of the meter core accommodating cavity are positioned in the meter core upper accommodating cavity; the method is characterized in that: the internal diameter that holds the chamber under the watch core is less than the internal diameter that holds the chamber on the watch core, the difference that holds the chamber internal diameter under the watch core and hold the chamber internal diameter on the watch core is D1, D1 value sets up according to the pressure that water gauge type, water gauge bore and impeller box screens structure width.
2. The stainless steel water meter case as set forth in claim 1, wherein a joint of said lower core receiving chamber and said upper core receiving chamber is provided with either a saw tooth structure, a screw structure or a frosted structure for increasing the fit between the joint of the lower core receiving chamber and the upper core receiving chamber and the core and preventing the core from rotating due to water flow impact.
3. The stainless steel water meter case as set forth in claim 1, wherein said watch core lower receiving chamber has a difference D2 between an inside diameter and an outside diameter of an impeller case water inlet portion of the watch core; the difference between the inner diameter of the accommodating cavity on the watch core and the outer diameters of the impeller box water outlet part, the pointer and the dial of the watch core is D3; and the D2 value and the D3 value are set according to the type of the water meter and the precision of the water meter.
4. The stainless steel water meter case as claimed in claim 1, wherein a horizontal and/or vertical deflector is provided at an opening between the water inlet end and the lower receiving cavity of the watch core, the horizontal deflector is used for guiding water flow to the lower side of the lower receiving cavity of the watch core and then to the watch core, and the vertical deflector is used for guiding water flow to the left side or the right side of the lower receiving cavity of the watch core and then to the watch core; the included angle between the transverse flow deflector and the horizontal plane is alpha 1, the included angle between the longitudinal flow deflector and the vertical plane is alpha 2, and the alpha 1 value and the alpha 2 value are set according to the type of the water meter, the average water flow and the accuracy of the water meter.
5. The stainless steel water meter case as set forth in claim 1, wherein a backflow preventing stopper is provided at an opening between said water outlet end and said holding cavity of said watch case core; the transverse included angle between the backflow prevention baffle and the water meter is beta, and the beta value is set according to the type of the water meter, the average water flow and the accuracy of the water meter.
6. The stainless steel water meter case of claim 1, wherein the junction of said inlet end and said lower receiving cavity of said core is an arcuate transition for mitigating water flow disturbance when water is introduced into said core.
7. The stainless steel water meter case as set forth in claim 1, wherein the difference D1 ═ k between the inside diameter of said lower receiving chamber and the inside diameter of said upper receiving chamber of said core1·a·f+k2B, wherein k is1And k2The weighting coefficient is set in advance, a is the pipe diameter of the water meter, f is the pressure born by the water meter, and b is the width of the clamping structure of the impeller box.
8. A water meter having a stainless steel water meter case comprising a water meter case and a meter core inside the water meter case, wherein the water meter case and the meter core are mounted in the positions as set forth in any one of claims 1 to 7.
9. The water meter with a stainless steel watermeter housing as claimed in claim 8, wherein the installation state of the water meter includes an installation state in which the movement dial is directed upward, an installation state in which the movement dial is directed downward, an installation state in which the movement dial is vertical, or an installation state in which the movement dial is inclined.
10. The water meter with a stainless steel watermeter housing as claimed in claim 9, wherein the impeller of the meter core is connected to the water inlet portion of the impeller case by a movable connection means for preventing the impeller from sliding up and down.
CN201910977775.7A 2019-10-15 2019-10-15 Stainless steel water meter shell and water meter Active CN110686733B (en)

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