CN117444551B - Manufacturing process and measuring method of high-precision venturi flowmeter - Google Patents
Manufacturing process and measuring method of high-precision venturi flowmeter Download PDFInfo
- Publication number
- CN117444551B CN117444551B CN202311792092.7A CN202311792092A CN117444551B CN 117444551 B CN117444551 B CN 117444551B CN 202311792092 A CN202311792092 A CN 202311792092A CN 117444551 B CN117444551 B CN 117444551B
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- China
- Prior art keywords
- metal ring
- pressure
- venturi
- holes
- pressure equalizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 abstract description 3
- 230000010349 pulsation Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- G01F1/34—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 by measuring pressure or differential pressure
- G01F1/36—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 by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- 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
- G01F1/34—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 by measuring pressure or differential pressure
- G01F1/36—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 by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- 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
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a manufacturing process and a measuring method of a high-precision venturi flowmeter, wherein the manufacturing process of the high-precision venturi flowmeter comprises the following steps: a ring groove is processed in the venturi tube; processing a metal ring and equally punching four pressure equalizing holes on the surface of the metal ring; embedding a metal ring with a pressure equalizing hole into a groove opening of the ring groove through hydraulic expansion to form a cavity; the communication between each chamber and the external space is not limited to four holes if necessary. The invention has the advantages that: the annular groove is formed in the venturi tube and is combined with hydraulic expansion to press the metal ring at the notch of the annular groove, the metal ring is extruded outwards in real time by utilizing the notch in the venturi tube, so that the metal ring and the main body can be firmly combined, the cavity is internally and externally communicated through four uniform holes, the influence of pulsation on pressure measurement when a measuring medium flows is avoided, the stability of measurement is improved, the measured pressure is converted into a flow signal to be displayed, and the accuracy and the stability of measurement are further improved.
Description
Technical Field
The invention relates to a manufacturing process and a measuring method of a high-precision venturi flowmeter, and belongs to the technical field of venturi flowmeters.
Background
The venturi flowmeter is a common device for measuring the flow of a pressurized pipeline, belongs to a differential pressure flowmeter and is commonly used for measuring the flow of fluids such as air, natural gas, coal gas, water and the like.
The general venturi needs to add a ring room to improve measurement accuracy, and at present this kind of ring room sets up in the venturi outside, and the pressure-bearing effect is poor, causes the unstable problem of flow state, is unfavorable for improving measuring accuracy, and general measurement mode can't measure more stably more accurately. Therefore, a manufacturing process and a measuring method of a high-precision venturi flowmeter are proposed to solve the above problems.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a process for manufacturing a high-precision venturi flowmeter and a measurement method.
The invention realizes the aim through the following technical proposal, and the manufacturing process of the high-precision venturi flowmeter comprises the following specific process steps:
step one, machining a ring groove in the venturi tube, and machining the angle on the ring groove according to the relation between the taper and the taper angle;
step two, processing a metal ring, and equally punching four pressure equalizing holes on the surface of the metal ring, wherein the thickness range of the section of the metal ring is 1cm to 2cm;
step three, embedding a metal ring with a pressure equalizing hole into the groove opening of the annular groove through hydraulic expansion to form a cavity;
step four, the communication between the inner space and the outer space of each cavity is not limited to four holes according to the requirement, and the four holes are used for installing and measuring the pressure sensor;
the relation between the taper C and the taper angle alpha is C=2×tan (alpha/2);
the ring groove section is of a horn cone-shaped structure, and the contact strength between the horn cone-shaped structure and the metal ring is controlled by hydraulic expansion, so that the metal ring is firmly contacted with the main body.
Preferably, the pore diameter of the pressure equalizing pore ranges from 8mm to 10mm.
Preferably, the venturi tube is not limited to two chambers formed in the processing, and each chamber is located at a different pipe diameter of the venturi tube.
The measuring method of the high-precision venturi flowmeter comprises the following specific measuring steps:
s1, under the condition that the pressure in the cavity is in a balanced and stable state through pressure equalizing holes on the metal ring, measuring medium enters the cavity through four pressure equalizing holes on the metal ring, and simultaneously, the pressure of the measuring medium is balanced to be compressed;
s2, during measurement, the measured pressure is measured through a differential pressure variable at the pressure equalizing hole and converted into a flow signal to be displayed.
The beneficial effects of the invention are as follows:
1. the annular groove is arranged in the Venturi tube, the metal ring is pressed at the notch of the annular groove in combination with hydraulic expansion, so that a chamber for measurement is formed, and the metal ring is provided with pressure equalizing holes, so that the stability of the measurement state in the chamber can be ensured;
2. the inner wall of the annular groove is used for processing the angle on the annular groove in the relation of taper and taper angle, so that the metal ring can be extruded outwards in real time by utilizing the notch in the venturi tube, and the metal ring and the main body can be firmly combined;
3. the pressure in the cavity is balanced and stable through the pressure equalizing holes on the metal ring, the measuring medium is in the cavity through the four holes on the ring groove, and the pressure of the measuring medium is balanced and pressed, so that the influence of pulsation on pressure measurement when the measuring medium flows through is avoided, and the measuring stability is improved;
4. the measured pressure is measured and converted into a flow signal through a differential pressure variable at the pressure equalizing hole to be displayed, and the accuracy and the stability of measurement are further improved through pressure equalizing conversion under the condition of unstable flow state.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a venturi flow meter according to the present invention;
fig. 2 is an enlarged view of a partial structure of the venturi meter of the present invention.
In the figure: 1. a venturi tube; 11. a ring groove; 12. a hole; 2. a chamber; 3. a metal ring; 31. equalizing holes.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-2, a manufacturing process of a high-precision venturi flowmeter, which specifically comprises the following steps:
step one, machining a ring groove 11 in the venturi tube 1, and machining the angle on the ring groove according to the relation between the taper C and the taper angle alpha;
step two, processing a metal ring 3, and equally punching four pressure equalizing holes 31 on the surface of the metal ring 3, wherein the thickness range of the section of the metal ring 3 is 1cm to 2cm;
step three, embedding the metal ring 3 with the pressure equalizing hole 31 into the notch of the annular groove 11 through hydraulic expansion to form a cavity 2;
step four, the communication between the inside and the outside space of each chamber 2 is not limited to the arrangement of four holes 12 according to the requirement, and is used for installing and measuring the pressure sensor;
the relation between the taper C and the taper angle alpha is C=2×tan (alpha/2);
the ring groove 11 has a horn cone-shaped cross section, and the contact strength between the horn cone-shaped structure and the metal ring 3 is controlled by hydraulic expansion, so that the metal ring 3 and the main body are firmly contacted.
Further, the diameter of the equalizing hole 31 is in the range of 8mm to 10mm.
Further, the venturi tube 1 is not limited to two chambers 2 formed therein, and each chamber 2 is located at a different pipe diameter of the venturi tube 1.
The measuring method of the high-precision venturi flowmeter comprises the following specific measuring steps:
s1, under the condition that the pressure in the chamber 2 is in a balanced and stable state through the pressure equalizing holes 31 on the metal ring 3, a measuring medium enters the chamber 2 through the four pressure equalizing holes 31 on the metal ring 3, and meanwhile, the pressure of the measuring medium is balanced and pressed, so that the influence of pulsation on pressure measurement when the measuring medium flows through is avoided, and the measuring stability is improved;
s2, during measurement, the measured pressure is measured and converted into a flow signal through a differential pressure variable at the pressure equalizing hole 31 to be displayed, and the accuracy and stability of measurement are further improved through pressure equalizing conversion under the condition of unstable flow state.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A manufacturing process of a high-precision venturi flowmeter is characterized in that: the specific process steps are as follows:
step one, machining a ring groove (11) in the venturi tube (1), and machining the angle on the ring groove according to the relation of taper and taper angle;
step two, processing a metal ring (3) and equally punching four pressure equalizing holes (31) on the surface of the metal ring, wherein the thickness range of the section of the metal ring (3) is 1cm to 2cm;
step three, embedding a metal ring (3) with a pressure equalizing hole into a notch of the annular groove (11) through hydraulic expansion to form a cavity (2);
step four, the communication between the inside and the outside space of each chamber (2) is not limited to the arrangement of four holes (12) according to the requirement, and the four holes are used for installing the measuring pressure sensor;
the relation between the taper C and the taper angle alpha is C=2×tan (alpha/2);
the cross section of the ring groove (11) is of a horn cone-shaped structure, and the contact strength between the horn cone-shaped structure and the metal ring (3) is controlled by hydraulic expansion, so that the metal ring (3) and the main body are firmly contacted.
2. A process for manufacturing a high accuracy venturi meter according to claim 1, wherein: the aperture of the pressure equalizing hole (31) ranges from 8mm to 10mm in diameter.
3. A process for manufacturing a high accuracy venturi meter according to claim 1, wherein: the venturi tube (1) is not limited to be provided with two chambers (2) in a machining mode, and each chamber (2) is located at a position of different tube diameters of the venturi tube (1).
4. A method of measuring a high accuracy venturi meter according to any of claims 1-3, wherein the method comprises: the specific measurement steps are as follows:
s1, pressure in a cavity is balanced and stable through pressure equalizing holes (31) on a metal ring (3), a measuring medium enters the cavity (2) through four pressure equalizing holes (31) on the metal ring (3), and the pressure of the measuring medium is balanced and pressed;
s2, during measurement, the measured pressure is measured through a differential pressure variable at the pressure equalizing hole (31) and converted into a flow signal to be displayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311792092.7A CN117444551B (en) | 2023-12-25 | 2023-12-25 | Manufacturing process and measuring method of high-precision venturi flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311792092.7A CN117444551B (en) | 2023-12-25 | 2023-12-25 | Manufacturing process and measuring method of high-precision venturi flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117444551A CN117444551A (en) | 2024-01-26 |
| CN117444551B true CN117444551B (en) | 2024-03-12 |
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| CN202311792092.7A Active CN117444551B (en) | 2023-12-25 | 2023-12-25 | Manufacturing process and measuring method of high-precision venturi flowmeter |
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| CN (1) | CN117444551B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325762Y (en) * | 1998-06-29 | 1999-06-23 | 中国核动力研究设计院 | Micro Flow Measuring Device |
| CN103791953A (en) * | 2013-05-28 | 2014-05-14 | 苍南自动化仪表厂 | High-precision integrated nuclear Venturi tube |
| CN205861133U (en) * | 2016-07-25 | 2017-01-04 | 湖北省计量测试技术研究院 | Venturi double difference pressure ultrasonic flow rate measurement apparatus |
| CN206311150U (en) * | 2016-12-15 | 2017-07-07 | 淮南庆达机械有限责任公司 | Self-correcting Fast Installation formula Venturi tube |
| CN107144312A (en) * | 2017-05-26 | 2017-09-08 | 苏州天大泰和自控仪表技术有限公司 | Flow measuring apparatus and flow meter assembly |
| CN108444555A (en) * | 2018-04-11 | 2018-08-24 | 哈尔滨理工大学 | A kind of novel Venturi tube-type spreader flowmeter |
| CN108548574A (en) * | 2018-04-08 | 2018-09-18 | 江阴市节流装置厂有限公司 | A kind of built-in Venturi meter that achievable bidirectional traffics measure |
| CN208547386U (en) * | 2018-08-08 | 2019-02-26 | 杭州成套节流装置有限公司 | A kind of Venturi nozzle |
| CN209027599U (en) * | 2018-12-07 | 2019-06-25 | 四川勤华科技有限公司 | A kind of redundant flow measuring device |
| CN209589141U (en) * | 2019-03-04 | 2019-11-05 | 上海科洋科技股份有限公司 | A kind of measuring device |
| CN213455639U (en) * | 2020-11-30 | 2021-06-15 | 深圳市量宇科技有限公司 | Gas flowmeter suitable for severe working conditions |
| CN217716509U (en) * | 2022-05-09 | 2022-11-01 | 江阴市节流装置厂有限公司 | Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction |
-
2023
- 2023-12-25 CN CN202311792092.7A patent/CN117444551B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2325762Y (en) * | 1998-06-29 | 1999-06-23 | 中国核动力研究设计院 | Micro Flow Measuring Device |
| CN103791953A (en) * | 2013-05-28 | 2014-05-14 | 苍南自动化仪表厂 | High-precision integrated nuclear Venturi tube |
| CN205861133U (en) * | 2016-07-25 | 2017-01-04 | 湖北省计量测试技术研究院 | Venturi double difference pressure ultrasonic flow rate measurement apparatus |
| CN206311150U (en) * | 2016-12-15 | 2017-07-07 | 淮南庆达机械有限责任公司 | Self-correcting Fast Installation formula Venturi tube |
| CN107144312A (en) * | 2017-05-26 | 2017-09-08 | 苏州天大泰和自控仪表技术有限公司 | Flow measuring apparatus and flow meter assembly |
| CN108548574A (en) * | 2018-04-08 | 2018-09-18 | 江阴市节流装置厂有限公司 | A kind of built-in Venturi meter that achievable bidirectional traffics measure |
| CN108444555A (en) * | 2018-04-11 | 2018-08-24 | 哈尔滨理工大学 | A kind of novel Venturi tube-type spreader flowmeter |
| CN208547386U (en) * | 2018-08-08 | 2019-02-26 | 杭州成套节流装置有限公司 | A kind of Venturi nozzle |
| CN209027599U (en) * | 2018-12-07 | 2019-06-25 | 四川勤华科技有限公司 | A kind of redundant flow measuring device |
| CN209589141U (en) * | 2019-03-04 | 2019-11-05 | 上海科洋科技股份有限公司 | A kind of measuring device |
| CN213455639U (en) * | 2020-11-30 | 2021-06-15 | 深圳市量宇科技有限公司 | Gas flowmeter suitable for severe working conditions |
| CN217716509U (en) * | 2022-05-09 | 2022-11-01 | 江阴市节流装置厂有限公司 | Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction |
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| Publication number | Publication date |
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| CN117444551A (en) | 2024-01-26 |
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Denomination of invention: Manufacturing process and measurement method of a high-precision Venturi flowmeter Granted publication date: 20240312 Pledgee: Bank of Nanjing Co.,Ltd. Changzhou Branch Pledgor: Changzhou Kewei Instrument Manufacturing Co.,Ltd. Registration number: Y2024980012877 |