[go: up one dir, main page]

WO2018068764A1 - Débitmètre à ultrasons à grand diamètre - Google Patents

Débitmètre à ultrasons à grand diamètre Download PDF

Info

Publication number
WO2018068764A1
WO2018068764A1 PCT/CN2017/106100 CN2017106100W WO2018068764A1 WO 2018068764 A1 WO2018068764 A1 WO 2018068764A1 CN 2017106100 W CN2017106100 W CN 2017106100W WO 2018068764 A1 WO2018068764 A1 WO 2018068764A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning
housing
transducer
disposed
positioning hole
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.)
Ceased
Application number
PCT/CN2017/106100
Other languages
English (en)
Chinese (zh)
Inventor
方欣
李新兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2018068764A1 publication Critical patent/WO2018068764A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662—Constructional details

Definitions

  • the invention relates to the field of flow measurement, and particularly relates to a large-diameter ultrasonic pipe section structure.
  • Ultrasonic flowmeter has high measurement accuracy compared with traditional mechanical flowmeter and electromagnetic flowmeter, and is hardly affected by parameters such as temperature, pressure and density of the fluid to be measured. It has strong adaptability to pipe diameter, easy to use and easy to digitize. Management and other advantages. At present, ultrasonic flowmeters have been widely used in industrial flow measurement fields such as large-caliber heat meters and large-diameter water meters. In practical applications, there is a higher demand for the range and measurement accuracy of the ultrasonic flowmeter.
  • the transducer mounting position in the ultrasonic flowmeter disclosed in the authorization publications CN 201993129 U, CN 204855038 U and CN 204330187 U is limited by the machining process of the inclined aperture and the design of the structure itself, so that the transducer can only be mounted at a distance
  • the farther position of the flange greatly reduces the projection distance of the connection between the transducers on the axis of the pipe segment.
  • the transducer Position selection and transducer mounting structure optimization has become a difficult issue.
  • the transducer is installed in a relatively close position to the existing ultrasonic flowmeter, so that the projection distance between the two transducers on the axis of the pipe segment is short, which reduces the problem of the flowmeter's measuring range and measurement accuracy, and the present invention A large diameter ultrasonic flow meter is provided.
  • a large-aperture ultrasonic flowmeter comprising a pipe segment housing and a transducer assembly, the pipe segment housing being provided at both ends with a positioning hole, the positioning hole being perpendicular to an axis of the pipe segment housing, the transducer assembly Provided in the positioning hole, the transducer components are two in a group, and the two used transducer assemblies are used for transmitting and receiving ultrasonic waves, the ultrasonic wave propagation path and the pipe segment
  • the axis of the housing is at an angle.
  • Positioning hole vertical pipe section housing axis setting compared with the prior art inclined setting positioning hole, the positioning hole in the processing process is the vertical pipe section housing diameter, the path of the cutter does not interfere with the flange, The processing difficulty is reduced, the processing precision is easily ensured, the processing cost is reduced, and the scribing alignment is simpler.
  • the installation of the transducer assembly does not interfere with the flange and does not interfere with the installation of the bolts on the flange, so the positioning can be placed closer to the flange. Under the condition that the length of the pipe section is constant, the closer the position of the transducer assembly is to the flange, the greater the sound path of the ultrasonic wave.
  • Embodiment 1 is a schematic structural view of Embodiment 1;
  • Embodiment 2 is a schematic view showing the overall structure of Embodiment 2;
  • Figure 3 is a front elevational view of Embodiment 2;
  • Figure 4 is a cross-sectional view along line A-A of Figure 3;
  • Figure 5 is a partial enlarged view of a portion B of Figure 4.
  • Figure 8 is a schematic diagram of the calculation principle of the flow meter measurement principle.
  • Figure 9 is a comparison diagram of the present invention and the prior art.
  • the invention provides a large-caliber ultrasonic flowmeter comprising a pipe segment housing 1 and a transducer assembly 2. Both ends of the pipe casing 1 are provided with positioning holes 17 which are perpendicular to the axis of the pipe casing 1 for fixing the transducer assembly 2.
  • the transducer assemblies 2 are two in a group and used together. The two transducer assemblies 2 used in combination are used for transmitting and receiving ultrasonic waves, and the ultrasonic wave propagation path is at an angle with the axis of the pipe casing 1 , and the flanges 13 are respectively disposed at both ends of the pipe casing 1 .
  • the tilting manner of the positioning hole makes the positioning hole not too close to the flange 13 for two reasons: one is in the process of processing the inclined hole, The path of the cutter will interfere with the flange 13 and leave enough space for the cutter. Secondly, when the transducer assembly 2 is installed, it is easy to interfere with the flange 13 and hinder the installation of the bolt on the flange 13. Leave enough room for installation.
  • the positioning hole 17 of the present invention is perpendicular to the arrangement of the pipe segment housing 1 and overcomes the above two technical problems. Compared with the prior art (authorization bulletin number CN 204855038 U), the positioning hole is inclinedly arranged, so that the positioning hole 17 is in the process.
  • the middle pass route is the diameter of the vertical pipe section housing 1, and the path of the cutter does not interfere with the flange 13, which reduces the processing difficulty, is easy to ensure the processing precision, reduces the processing cost, and the scribing alignment is simpler;
  • the mounting of the assembly 2 does not interfere with the flange 13 and does not interfere with the mounting of the bolts on the flange, so the positioning 17 can be placed closer to the flange 13. Under the condition that the length of the pipe casing 1 is constant, the closer the position of the transducer assembly 2 is to the flange 13, the greater the sound path of the ultrasonic wave.
  • Ultrasonic waves carry information about the fluid flow rate as they propagate through the flowing fluid. Therefore, the flow rate of the fluid can be detected by the received ultrasonic wave, and converted into a flow rate.
  • the two transducer assemblies 2 used in conjunction with each other simultaneously emit ultrasonic waves and then receive the transmitted ultrasonic waves. As shown in Fig. 8, the liquid flow in the pipe casing 1 can be calculated based on the received time difference ⁇ t:
  • V average the smallest average flow rate of the liquid (gas) body that can be measured
  • ⁇ angle between the direct beam of the transducer and the axis of the pipe section
  • V ⁇ represents the velocity of the fluid in the direction of the direct beam of the transducer (for a horizontal pipe, it is a diagonal line, which is a component of the horizontal amount)
  • a and B are transducers used in pair with each other
  • Q3 is the common flow rate of a certain type of flow meter, which is a fixed value.
  • Q1 is the minimum flow that meets the national standard error requirement.
  • the sectional area S is determined, the flow rate Q1 proportional to the average flow velocity V per unit time, i.e., the average V, the smaller Q1, and the range / larger than Q3 Q1.
  • the flowmeter disclosed in the present invention is disposed through the vertical pipe section housing 1 of the positioning hole 17, so that the transducer assembly 2 is disposed as close as possible to the flange 13, and the maximum ultrasonic sound path L is obtained on the pipe casing 1 of a certain length. , thereby reducing the V average , the flow meter can measure the minimum flow is smaller, and the flowmeter's turndown ratio is improved.
  • the positioning hole 17 in the prior art is placed obliquely, ⁇ is 55°, the maximum sound path is 367 mm, and the sound path is in the pipe segment.
  • the projection distance on the axis of the housing 1 is 211 mm.
  • the obtained ⁇ is 45°
  • the maximum sound path is 389 mm
  • the projection distance of the sound path on the axis of the pipe casing 1 is 275 mm.
  • the sound path is The projection distance on the axis of the pipe segment housing 1 is increased by 30.5%.
  • the ratio of the minimum flow ratio when ⁇ is 55° to the minimum flow ratio when Q 55 is minimum and ⁇ is 45° is the smallest ratio of Q 45 :
  • the range ratio of the flow meter in which the positioning hole 17 of the present invention is vertically disposed is 1.304 times that of the prior art.
  • two flanges 13 are respectively disposed at two ends of the pipe casing 1, and the flange 13 is provided with bolts. Hole, a pipe that connects the flow to be measured by bolting.
  • Two positioning holes 17 are disposed at two ends of the pipe casing 1 near the flange 13, respectively located at the lower side and the upper side of the left and right ends of the pipe casing 1, and the positioning holes 17 are used for mounting the positioning transducer assembly 2, the positioning hole 17 It is disposed perpendicular to the pipe section housing 1.
  • the transducer assembly 2-1 is used in conjunction with the transducer assembly 2-2, one transducer 202 being disposed in each of the two transducer assemblies 2, and the transducer 202 is partially exposed outside the transducer assembly 2.
  • the direction of emission of the two transducers 202 is at an angle to the axis of the segment housing 1.
  • the circuit case 4 is disposed at an intermediate portion of the pipe section housing 1, and a controller is disposed in the circuit case 4.
  • the wires of the transducer 202 are connected to the controller via a conduit 5.
  • the positioning hole 17 should be disposed close to the flange 13 to the maximum extent without affecting the installation and processing, so as to increase the surface between the two transducers 202.
  • the outer edge height of the positioning hole 17 should be lower than the height of the bolt hole of the flange 13.
  • a plurality of transducers 202 can be disposed in the transducer assembly 2, and two transducers 202 are disposed in one transducer assembly 2 as a preferred solution.
  • the transducer assemblies 2 that are used in conjunction with each other can be set in groups of two. When measuring fluid flow.
  • the plurality of sets of transducer assemblies 2 can be compared to each other to prevent inaccurate flow measurements of individual transducer assemblies 2, and other transducer assemblies 2 can be left in reserve.
  • the pipe segment housing 1 is a nominal DN300 aperture
  • the transducer assembly 2 is a group of two, a total of eight transducer assemblies 2 are provided, and each transducer assembly 2 is provided with two transducers 202. .
  • Embodiment 2 as shown in Figures 2, 3 and 4, two sets of transducer assemblies 2 are provided in the pipe section housing 1, the first group: the transducer assembly 2-1 is used in conjunction with the transducer assembly 2-2 Second set: The transducer assembly 2-3 is used in conjunction with the transducer assembly 2-4.
  • the transducer assembly 2 includes a housing 201 and two transducers 202.
  • the housing 201 is provided with a positioning surface 208 that cooperates with the positioning hole 17.
  • the housing 201 is also provided with a positioning surface 208.
  • Two oblique mounting holes 203 and two transducers 202 are respectively mounted in the two mounting holes 203.
  • the end of the transducer 202 has a table The step surface cooperates with the step surface on the mounting hole 203, and the transducer 202 is fixedly fixed to the outside of the housing and protrudes into the tube housing 1.
  • the transducer assembly 2 further includes a fixed plate 211 and a seal ring 210.
  • the fixing plate 211 and the housing 201 are detachably connected by a screw 212.
  • the seal ring 210 is disposed between the fixed plate 211 and the transducer 202 in order to prevent liquid from flowing into the housing 201 through the gap between the mounting hole 203 and the transducer 202.
  • the transducer assembly further includes a pressure ring 207, an upper seal ring 205, and a lower seal ring 204.
  • a stepped surface 171 is provided in the positioning hole 17, and cooperates with the positioning surface 208.
  • the lower sealing ring 204 is disposed on the positioning surface 208 for preventing liquid from flowing into the interior of the housing 201 through the gap between the housing 201 and the positioning hole 17.
  • the pressure ring 207 is screwed to the positioning hole 17, but is not limited thereto.
  • the upper seal ring 205 is disposed between the pressure ring 207 and the housing 201 to prevent external impurities from entering the inside of the housing 201.
  • the transducer assembly 2 further includes a positioning platen 206 and a positioning pin 213.
  • the positioning platen 206 is provided with a first positioning hole 2062 that is adapted to the positioning pin 213.
  • the housing 201 is provided with a second positioning hole 214 adapted to the positioning pin 213.
  • the positioning pin 213 passes through the first positioning hole 2062 and the second positioning hole 214 to prevent the housing 201 from rotating relative to the positioning platen 206, and the positioning pin 213,
  • One or more of the first positioning hole 2062 and the second positioning hole 214 should be provided, and three are provided in this embodiment.
  • the positioning platen 206 is provided with an anti-rotation protrusion 2061.
  • the positioning hole 17 is provided with a card slot adapted to the anti-rotation protrusion 2061 to prevent the positioning platen 206 from rotating relative to the positioning hole 17.
  • the positioning platen 206 is disposed between the upper sealing ring 205 and the pressure ring 207, and the spacer 209 is disposed between the positioning platen 206 and the pressure ring 207.
  • the gasket 209 is a polytetrafluoroethylene gasket. For the convenience of installation, the positioning pressure plate 206 and the pressure ring 207 are prevented from being damaged by friction.
  • an end cover 14 and an O-ring 11 are provided, The end cap 14 is screwed to the positioning hole 17, and the O-ring 11 is disposed between the end cap 14 and the positioning hole 17.

Landscapes

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

Abstract

Un débitmètre à ultrasons à grand diamètre comprend un corps tubulaire (1) et des composants de transducteur (2). Des trous de positionnement (17) sont formés au niveau des deux extrémités du corps tubulaire (1). Les trous de positionnement (17) sont perpendiculaires à un axe central du corps tubulaire (1). Les composants de transducteur (2) sont disposés dans les trous de positionnement (17). Un ensemble des composants de transducteur (2) comprend deux composants de transducteur (2) fonctionnant ensemble. Le débitmètre à ultrasons présente, dans une longueur finie du corps tubulaire, une distance de projection maximale sur l'axe de tube central et entre les transducteurs, ce qui augmente sa plage de mesures et sa précision de mesure.
PCT/CN2017/106100 2016-10-14 2017-10-13 Débitmètre à ultrasons à grand diamètre Ceased WO2018068764A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610899986.XA CN106441471A (zh) 2016-10-14 2016-10-14 一种大口径超声波流量计
CN201610899986.X 2016-10-14

Publications (1)

Publication Number Publication Date
WO2018068764A1 true WO2018068764A1 (fr) 2018-04-19

Family

ID=58174499

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/106100 Ceased WO2018068764A1 (fr) 2016-10-14 2017-10-13 Débitmètre à ultrasons à grand diamètre

Country Status (2)

Country Link
CN (1) CN106441471A (fr)
WO (1) WO2018068764A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107621293A (zh) * 2017-09-18 2018-01-23 上海中核维思仪器仪表有限公司 地下用高精度气体超声流量测量装置及测量方法
CN108572015A (zh) * 2017-12-31 2018-09-25 深圳市前海海洋仪表科技有限公司 偏转安装侦测管的超声波水表
CN110243420A (zh) * 2018-03-09 2019-09-17 江苏迈拓智能仪表有限公司 一种组装式超声流量计管段结构和工艺方法
CN110849429A (zh) * 2019-09-12 2020-02-28 成都安迪生精测科技有限公司 一种油气回收超声波流量计
CN114197583A (zh) * 2021-12-31 2022-03-18 上海克础机械(集团)有限公司 一种无负压供水流量导出数据的方法
CN115077638A (zh) * 2022-05-10 2022-09-20 陕西航天动力高科技股份有限公司 一种超声波流量计换能器组件及超声波流量计
CN117168556B (zh) * 2023-09-18 2024-10-18 苏州东剑智能科技有限公司 一种大口径直通式多通道超声波流体测量装置
CN118067209B (zh) * 2024-03-23 2024-10-18 苏州东剑智能科技有限公司 一种超大口径直通式多通道超声波流体测量装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4970902A (en) * 1988-12-05 1990-11-20 Mitsubishi Denki Kabushiki Kaisha Karman's vortex flow meter
JP2011033389A (ja) * 2009-07-30 2011-02-17 Aichi Tokei Denki Co Ltd 超音波流量計
CN102384773A (zh) * 2011-11-10 2012-03-21 吉林市宏远仪表有限责任公司 超声波热量表用n型反射式流量管
CN102706399A (zh) * 2012-06-13 2012-10-03 广州柏诚智能科技有限公司 超声波流量计及超声波流量计量方法
CN202562538U (zh) * 2012-04-25 2012-11-28 江西三川水表股份有限公司 一种可提高测量精度的流体管道
CN102798419A (zh) * 2012-08-15 2012-11-28 江苏迈拓智能仪表有限公司 一种超声波流量传感器
CN202770480U (zh) * 2012-08-15 2013-03-06 江苏迈拓智能仪表有限公司 一种超声波流量传感器
CN206146473U (zh) * 2016-10-14 2017-05-03 青岛海威茨仪表有限公司 一种大口径超声波流量计
CN206161073U (zh) * 2016-10-26 2017-05-10 宁波贝立欧仪表科技有限公司 一种大口径超声波流量计的声程扩展结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7795783B2 (en) * 2006-04-26 2010-09-14 Thermo Fisher Scientific Inc. Transducer assembly
EP2146190B1 (fr) * 2008-07-15 2014-11-19 Krohne AG Convertisseur d'ultrasons
CN103868629A (zh) * 2012-12-18 2014-06-18 杭州三花研究院有限公司 一种超声波热量表
DE102014105840A1 (de) * 2013-05-21 2014-11-27 Endress + Hauser Flowtec Ag Ultraschallwandler-Montageanordnung
US9711709B2 (en) * 2013-08-08 2017-07-18 General Electric Company Transducer systems

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4970902A (en) * 1988-12-05 1990-11-20 Mitsubishi Denki Kabushiki Kaisha Karman's vortex flow meter
JP2011033389A (ja) * 2009-07-30 2011-02-17 Aichi Tokei Denki Co Ltd 超音波流量計
CN102384773A (zh) * 2011-11-10 2012-03-21 吉林市宏远仪表有限责任公司 超声波热量表用n型反射式流量管
CN202562538U (zh) * 2012-04-25 2012-11-28 江西三川水表股份有限公司 一种可提高测量精度的流体管道
CN102706399A (zh) * 2012-06-13 2012-10-03 广州柏诚智能科技有限公司 超声波流量计及超声波流量计量方法
CN102798419A (zh) * 2012-08-15 2012-11-28 江苏迈拓智能仪表有限公司 一种超声波流量传感器
CN202770480U (zh) * 2012-08-15 2013-03-06 江苏迈拓智能仪表有限公司 一种超声波流量传感器
CN206146473U (zh) * 2016-10-14 2017-05-03 青岛海威茨仪表有限公司 一种大口径超声波流量计
CN206161073U (zh) * 2016-10-26 2017-05-10 宁波贝立欧仪表科技有限公司 一种大口径超声波流量计的声程扩展结构

Also Published As

Publication number Publication date
CN106441471A (zh) 2017-02-22

Similar Documents

Publication Publication Date Title
WO2018068764A1 (fr) Débitmètre à ultrasons à grand diamètre
CN101576399B (zh) 超声波水表、热量表流量传感器
CN105157771B (zh) 一种时差式超声波流量测量方法及装置
US7870793B1 (en) Transit time flow sensor with enhanced accuracy
WO2010002432A1 (fr) Débitmètre ultrasonique insérable et procédé associé
CN105181997A (zh) 非接触式超声波水流流速计及非接触式流速检测方法
CN107356298A (zh) 一种不锈钢超声波阀控水表检测管段
CN106323392A (zh) 抗干扰的超声流量传感器的测量管段
CN101726336A (zh) 一种超声波流量计
CN204313900U (zh) 平行多声道插入式流量计以及在管道上的插装结构
CN104358560B (zh) 一种带保护机构的井下流量测试装置
CN206146473U (zh) 一种大口径超声波流量计
CN107782387B (zh) 一种基于飞行时间法的流量测量传感器的结构与安装方法
CN103674146A (zh) 一种基于超声流量计的质量流量计
US10663332B2 (en) Structure of flow measurement sensor based on time-of-flight and method for installation thereof
CN119666090A (zh) 一种双向流量式平衡流量计
CN108375449B (zh) 间接测量摩擦应力的压差测量装置的标定装置及标定方法
CN210638750U (zh) 一种高精度超声波水表
CN111964739A (zh) 一种气流超声波流量计流道结构
JP2018077066A (ja) サドル型超音波流速計及び流速計測方法
CN218330084U (zh) 一种交叉式超声测温管段体结构
WO2023197457A1 (fr) Compteur d'eau ultrasonore à faible débit
CN206321285U (zh) 一种高精度低压损的超声波水表
CN217716505U (zh) 一种保坍型聚羧酸减水剂生产用涡街流量计
CN206248152U (zh) 一种超声流体测量装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17860635

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17860635

Country of ref document: EP

Kind code of ref document: A1