WO2005064291A1 - 基準体積管 - Google Patents
基準体積管 Download PDFInfo
- Publication number
- WO2005064291A1 WO2005064291A1 PCT/JP2004/010782 JP2004010782W WO2005064291A1 WO 2005064291 A1 WO2005064291 A1 WO 2005064291A1 JP 2004010782 W JP2004010782 W JP 2004010782W WO 2005064291 A1 WO2005064291 A1 WO 2005064291A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- reference volume
- fluid
- tube
- section
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/11—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters using a seal ball or piston in a test loop
Definitions
- the present invention is based on a reference volume represented by a movement of a movement element within a measurement pipe section having a reference volume, more precisely, when the movement element is moved when the movement element moves in a predetermined area.
- One method of calibrating (testing) a flow meter is to use a reference volume tube as a calibration device.
- a measurement pipe volume pipe, proof bar pipe
- reference volume a reference volume
- test flow meter a flow meter to be calibrated
- Reference volume tubes can be broadly classified into unidirectional pullovers (UNIDIRECTIONAL PROVER) and bidirectional pullovers (BIDIRECTIONAL PROVER).
- the measurement pipe is formed into a loop pipe shape or a straight pipe shape, and both the reference section of the measurement pipe section is used. Equipped with two detectors at the end and formed within the measuring tube part by, for example, about 2 to 4% larger than the inner diameter of the measuring tube part.
- a ball with a high elasticity hereinafter referred to as a sphere
- piston The flowmeter under test is tested by inserting a moving element such as a probe and moving the moving element in one direction between the two detectors. When the test is repeated, after the end of one test, the tracing element that has reached the end of the measuring tube is returned to the beginning of the measuring tube for the next test.
- the latter method uses a bidirectional prober, which uses a device with almost the same configuration as the unidirectional prober, but after the trajectory moves in one direction between the two detectors, The flow path is switched by a valve, etc., so that the motor moves in the opposite direction.
- a bidirectional prober which uses a device with almost the same configuration as the unidirectional prober, but after the trajectory moves in one direction between the two detectors, The flow path is switched by a valve, etc., so that the motor moves in the opposite direction.
- the reference volume pipe with the measuring pipe section formed in a straight pipe shape has, for example, twice the length of the reference volume pipe with the measurement pipe section formed in a loop pipe shape.
- a measurement tube is required, but to avoid this problem, a small volume compact looper with a reduced reference volume by the pulse internal method and a compact device that is portable is also used. This small volume compact probe can also be included in the reference volume tube in a broad sense.
- the conventional unidirectional prober (hereinafter simply referred to as a reference volume tube) will be further described with reference to FIG.
- the reference volume pipe 1a has a prober pipe 2a having a reference volume.
- the reference volume is determined by precisely measuring the volume of the section from the first detector 6a to the second detector 7a in advance.
- the fluid flows from the inlet pipe 3a to the outlet pipe 4a through the proofer pipe 2a.
- calibration is performed based on the volume of the fluid discharged when the sphere 5a moves in the section from the first detector 6a to the second detector 7a in the proofer pipe 2a.
- the volume of the fluid discharged when the sfair 5a moves sectionally is substantially equal to the reference volume, and the reference volume is represented by the sfair 5a moving sectionally.
- calibration is performed by comparing this reference volume with the indicated value (volume) of the flow meter under test.
- the reference volume pipe la adopts a method of automatically circulating the spar 5a.
- the sifter 5a which has been sectionally moved, is taken out from the end of the prober pipe 2a and discharged to the beginning of the prober pipe 2a.
- a passage section 8 is provided.
- the passage section 8 is provided with valves 8a and 8b and a relay section 8c between the valves 8a and 8b for holding the squirt air 5a.
- the reference numeral 8 d indicates a squeezing member control device.
- a fluid is circulated in advance through the plumber pipe 2a, and is kept in a steady state so that a predetermined flow velocity of, for example, about 3 m / sec recommended by the American Petroleum Institute (API) standard can be obtained stably.
- API American Petroleum Institute
- valve 8a is closed and the valve 8b is opened, so that the squirt air 5a is emitted into the stable fluid flow in the proofer pipe 2a.
- test and calibration operations can be performed with high accuracy.
- the reproducibility at the time of calibration is within 0.01%, including the case of the bidirectional prober described later. Accuracy of 0000 to 1/500 is required, and high accuracy is required in all cases.
- the conventional bidirectional prober hereinafter simply referred to as a reference volume tube
- the reference volume tube 1b includes a puller pipe 2b having a reference volume, similarly to the reference volume tube 1a that is a unidirectional proofer.
- Two detectors 6b and 7b are provided in the proofer pipe 2b. Both ends of the proofer pipe 2b are formed to have a diameter larger than the diameter of the proofer pipe 2b. b is provided for each.
- the dimensions of the pull-bar pipe 2b are normally determined as follows.
- the reference volume is set to about 0.5% or more of the maximum test flow rate (per hour).
- the flow velocity of the fluid in other words, the moving velocity of the sphere is set to about 1.5 m / sec, which is smaller than that of the above-mentioned universal proofer.
- the prover pipe tube diameter (diameter) of about 0. 6 9 m and ing. Then, the distance between the two detectors corresponding to the reference volume at this time is about 27 m.
- the fluid pipes 3b and 4b and the two pipe sections 9a and 9b are connected so that the flow paths can be switched by a four-way valve 9c.
- a flow meter to be tested (not shown) is attached to one of the fluid pipes 3b and 4b.
- the flow direction of the fluid is switched by operating the four-way valve 9c.
- the fluid pipe 3b and the pipe section 9a on the side where the flow meter under test is mounted are connected to each other, and the fluid pipe 4b is connected to the fluid pipe 4b.
- the communication with the pipe section 9 b is established.
- the previous fluid before switching the flow direction is retained in a liquid-tight manner in the pluver pipe 2 b and the pipe section 9 a, and the sifter 5 moving from the pluver pipe 2 b is stored in the pipe section 9 a.
- b is pre-arranged Has been.
- the fluid flowing into the pipe portion 9a gradually increases in flow rate as the valve opening of the four-way valve 9c increases, and finally reaches a predetermined flow rate, so that the fluid has a predetermined flow rate together with the fluid.
- 5b moves in a section between the two detectors 6b and 7b within the pull-back pipe 2b, measurement is performed, and the sphere 5b further reaches the pipe 9b.
- the four-way valve 9c is operated to make the fluid pipe 3b and the pipe 9b in communication with each other, and the fluid pipe 4b and the pipe 9a are in communication with each other.
- the flow is performed by moving the sphere 5b in the prober pipe 2b between the two detectors 7b and 6b.
- the sphere 5b leads to the pipe 9a.
- the former reference volume tube 1a which is a dual-directional loupe
- the passage section 8 has a complicated device structure due to the provision of the passage section 8.
- the reference volume tube 1b which is the latter bidirectional probe, does not have a passage portion
- the device structure is correspondingly simple. Disclosure of the invention
- the switching operation of the four-way valve 9c requires, for example, more than 10 seconds.
- the fluid when the fluid starts flowing into the pipe section 9a or 9b, the force 5b that moves in the pipe section 9a or 9b from the force is shown in FIG. After the approach period indicated by 1 in the figure, the fluid moves along the fluid in a predetermined section of the prober pipe 2b at a predetermined flow rate.
- the time required for the fluid to reach the predetermined flow rate specifically corresponds to, for example, the time required for the four-way valve 9c to be half-opened or fully opened.
- the switching means of the flow path is not limited to the one using a multi-way valve such as a four-way valve, but, for example, a plurality of single valves are separated into a measurement pipe section of the device so as to exhibit the same function as the four-way valve. Even if they are arranged, similar problems can occur, apart from the degree of difference.
- the present invention has been made in view of the above-described problems, and provides a reference volume tube in which a longitudinal element can be shortened in a reference volume tube in which a moving element moves in a pullover pipe by a fluid.
- the purpose is to:
- a reference volume pipe includes a measurement pipe section (volume pipe) having a reference volume defined in a predetermined section, and a motor moves through the measurement pipe section in the predetermined section.
- the reference volume tube according to the present invention is characterized in that the waiting means is a mechanical stopper for locking the moving element.
- the mechanical stopper can be composed of a pin that engages with the motor and a hydraulic cylinder that biases the pin.
- the reference volume tube according to the present invention is a bidirectional puller type configured such that the fluid can move bidirectionally in the measurement tube portion, and the standby means is provided at both ends of the measurement tube portion.
- the standby means is provided at both ends of the measurement tube portion.
- it has a multi-way valve connected between the both ends and the flow meter to be tested, and for introducing the fluid to one of the two ends by switching a flow path. I do.
- the measurement pipe section can be configured by a loop pipe. Since the reference volume tube according to the present invention has the standby means for holding the motor at a predetermined position on the upstream side of the starting point of the predetermined section of the measurement pipe section, the standby means is released when the flow direction is completely switched. Accordingly, the moving element can be moved at a predetermined flow rate by the fluid. This eliminates the need to provide a long runway as in the past, and can reduce the length of the reference volume pipe in the longitudinal direction.For example, it is possible to reduce the installation area of the reference volume pipe. it can. Furthermore, it becomes possible to mount a reference volume tube on a vehicle as a portable type.
- FIG. 1 is a schematic plan view of a conventional universal proofer type reference volume tube.
- FIG. 2 is a schematic plan view of a conventional bidirectional proofer type reference volume tube.
- FIG. 3 is a schematic plan view of a reference volume tube according to an embodiment of the present invention.
- the reference volume tube 10 according to the present embodiment shown in FIG. 3 is a directional probe having substantially the same basic configuration as that shown in FIG. 2 as a conventional example.
- the reference volume tube 10 includes a loop tube-shaped measurement tube portion (hereinafter referred to as a blue bar pipe) 12 having a reference volume. Pruva pie
- the pump 12 is provided with two detectors 14a and 14b.
- the volume formed in the prober pipe 12 in the section between the two detectors 14a and 14b is the reference volume.
- an appropriate type can be selected and used, for example, a mechanically operated electric switch, an electronic proximity switch, an inductive pickup, etc. Can be used.
- Pipe sections 16a and 16b are provided at both ends of the proof bar pipe 12, and the distance between the ends of the pipe sections 16a and 16b and the detectors 14a and 14b (in FIG. 3, L) is much shorter than before.
- the diameters of the pipe sections 16a and 16b are formed to be larger than the diameter of the punoleaver pipe 12 as in the conventional case.
- the sides of the pipes 16 a, 16 b near the detectors 14 a, 14 b, that is, the pipes 16 a, 16 b are fluid.
- Standby means 18a, 18b are provided upstream of the detectors 14a, 14b when used as the inflow side, respectively.
- the standby means 18a and 18b are mechanical stoppers, and are constituted by pin-shaped gates 20a and 20b and hydraulic cylinders 22a and 22b.
- the gates 20a and 20b are urged by the hydraulic cylinders 22a and 22b to advance or retreat inside the pipe sections 16a and 16b in the radial direction.
- the gate 20b of the standby means 18b provided between the sphere 24 and the detector 14b.
- the tube 24 projects from the tube 16b to the detector 14b in FIG. 3 so that the air 24 that moves from the tube 16b to the detector 14b is locked to the gate 20b. Then, the movement of the sphere 24 in the direction of the detector 14b is prevented, and the state where the sphere 24 stands by at that position is established.
- the gate 20b retracts toward the pipe wall of the pipe section 16b, the standby state of the air 24 is released.
- Standby means 18a and 18b are hydraulic cylinders 2 2
- an electric cylinder, an air cylinder, or the like can be used, and other appropriate driving means can be used.
- other mechanical stoppers can be used as the standby means 18a and 18b as long as they have the function of stopping the movement of the sifter 24 and making the standby at a predetermined position.
- appropriate electric or electronic means can be used as the standby means 18a and 18b.
- Fluid pipes 26a, 26b and two pipe sections 16a, 16b used as either inlet pipe or outlet pipe by switching the flow path can be switched with a four-way valve 28 Connected to.
- reference numerals 30a and 30b indicate temperature gauges for measuring the temperature of the fluid
- reference numerals 32a and 32b indicate pressure gauges for measuring the pressure of the fluid, respectively.
- a flow meter to be tested (not shown) is connected to one of the fluid pipes 26a and 26b, for example, the fluid pipe 26a. That is, the flow meter under test is connected in series with the reference volume pipe 10 via the fluid pipe 26a.
- the flowmeter under test is equipped with a pulse transmitter that generates and transmits a number of pulses proportional to the flow rate (not shown).
- the detection signal (start Z stop signal) of the pulse signal detector 14a and 14b of this pulse transmitter is taken into a measurement CPU (pulling computer) not shown.
- control signals are sent from a control CPU (flow computer) (not shown) to the four-way valve 28 and the hydraulic cylinders 22a and 22b.
- the opening signal of the four-way valve 28 is sent to the control CPU.
- the four-way valve 28 and the hydraulic cylinders 22a and 22b are manually operated. May be.
- Fig. 3 shows the state in which the measurement has been completed by flowing the fluid from the fluid pipe 26a in the direction from the pipe section 16a to the pipe section 16b.
- the sphere 24 that has moved in the counterclockwise direction reaches the pipe 16b and stays there.
- the four-way valve 9c is operated by the control signal of the control CPU to make the fluid pipe 26a and the pipe section 16b communicate with each other, and the fluid pipe 26
- the flow direction of the fluid flowing through the reference volume pipe 10 is reversed by setting the b and the pipe section 16 a to be in communication with each other.
- the sphere 24 is previously arranged in the tube portion 16b.
- the gate 20b is closed by the control signal of the control CPU on the upstream side of the sfair 24.
- the fluid that has passed through the flowmeter under test starts flowing from the fluid pipe 26a into the pipe section 16b. If the fluid 24 has moved to the position of the gate 20b due to the fluid that has not yet reached the predetermined flow velocity, the solution 24 is locked at the position at the position of the gate 20b, stops and enters a standby state. Fluid flows through the gap between the sphere 24 and the pipe 16 b into the proofer pipe 12.
- the gate is operated by a control signal of the control CPU. 20 b is opened, and the sphere 24 is released from the standby state.
- the air 24 passes through the fluid having a predetermined flow velocity and the proofer pipe 12.
- the operation of the valve is used as means for determining that the flow direction of the fluid has been switched reliably and has reached the predetermined flow velocity. Information such as the elapsed time from the start and the flow velocity (or flow rate) of the flow meter under test may be used.
- the measuring CPU measures the number of pulses from the pulse transmitter from the time when the detection signal of the detector 14b is obtained to the time when the detection signal of the detector 14a is obtained.
- the flow volume under test is calculated from the reference volume and the number of measured pulses since the reference volume is represented by the movement of the squirt air 24 between the two detectors 14a and 14b on the proof bar pipe 12.
- the indicated values (volumes) of the errors of the test flowmeter are measured, and the necessary calibration is performed.
- this pulse signal for example, an analog signal of a voltage obtained corresponding to the flow rate may be used.
- the control CPU and the measurement CPU may be shared.
- the standby means 18a and 18b are provided in the pipe sections 16a and 16b. Instead, the standby means 18a and 18b are provided. It is also conceivable to provide at the end of the proof pipe 12. That is, by providing the standby means 18a, 18b at both ends of the prober pipe 12, that is, upstream of the detectors 14a, 14b, the pipe sections 16a, 16b are omitted. However, it is conceivable to make the reference volume tube 10 smaller.
- the sphere 24 made to stand by by the standby means 18a and 18b functions as a valve provided on the upstream side of the four-way valve 9c, so that the four-way valve 9c is set to a predetermined opening. Until the flow 24, the flow of the fluid is shut off, and when the four-way valve 9c reaches the predetermined opening, the standby means 18a and 18b are released, so that the fluid having the predetermined flow velocity As a result, the sphere 24 moves.
- the standby means 18 a and 18 b and the detectors 14 a and 1 It is necessary to devise measures such as installing a discharge pipe to discharge the fluid at the part of the runway between 4b. This drain will be closed during the next measurement.
- the initial period during which the swoof 24 starts moving by releasing the standby means 18a and 18b is a short time, but the flow of the fluid is reduced from zero to a predetermined flow rate. Changing to the state cannot be avoided. That is, although the time required for the fluid to reach the predetermined flow velocity is shorter than in the past, this time is not completely eliminated. For this reason, unlike the present embodiment, the conventional problem is not completely eliminated, and it is considered that the measurement accuracy still remains low.
- the pluver pipe 12 uses a tube having a cross-sectional shape such as an ellipse or a square instead of a tube having a circular cross-sectional shape. You can use Further, as the pull-bar pipe 12, a straight pipe may be used instead of the loop pipe. Also, the flow meter under test may be arranged downstream of the proof pipe 12 instead of being arranged upstream of the proof pipe 12.
- a test is performed without flowing channel switching structure, and a test is performed by flowing a fluid only in one direction.
- the present invention can also be applied to
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/581,605 US20070119227A1 (en) | 2003-12-25 | 2004-07-22 | Reference volume tube |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-428602 | 2003-12-25 | ||
| JP2003428602A JP2005189014A (ja) | 2003-12-25 | 2003-12-25 | 基準体積管 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005064291A1 true WO2005064291A1 (ja) | 2005-07-14 |
Family
ID=34736281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/010782 Ceased WO2005064291A1 (ja) | 2003-12-25 | 2004-07-22 | 基準体積管 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20070119227A1 (ja) |
| JP (1) | JP2005189014A (ja) |
| KR (1) | KR20070000440A (ja) |
| CN (1) | CN1898537A (ja) |
| WO (1) | WO2005064291A1 (ja) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008215896A (ja) * | 2007-03-01 | 2008-09-18 | Oval Corp | バイディレクショナルプルーバ |
| US9719837B2 (en) | 2008-05-29 | 2017-08-01 | Wfms, Inc. | Method and apparatus for a bidirectional meter proving system |
| US9581486B2 (en) * | 2008-05-29 | 2017-02-28 | Wfms, Inc. | Method and apparatus for a bidirectional meter proving system |
| US8505355B2 (en) | 2008-05-29 | 2013-08-13 | Welker Flow Measurement Systems, Inc. | Method and apparatus for a bidirectional meter proving system |
| CN101598590B (zh) * | 2008-06-02 | 2011-06-08 | 浙江富马仪表有限公司 | 双向双球标准体积管 |
| KR101531020B1 (ko) * | 2013-07-18 | 2015-06-24 | 주식회사 우진 | 프리런 구간이 요구되지 않는 양 방향 기준 체적관 |
| US10228309B2 (en) | 2015-12-18 | 2019-03-12 | Savant Measurement Corporation | Hybrid product sampling system |
| US10240967B2 (en) | 2016-06-08 | 2019-03-26 | Saudi Arabian Oil Company | Systems and methods to obtain diagnostic information related to a bi-directional prover |
| CN105823533A (zh) * | 2016-06-17 | 2016-08-03 | 宁波明泰流量设备有限公司 | 一种流量表双时钟检测方法 |
| CN106338322B (zh) * | 2016-08-31 | 2019-05-21 | 金卡智能集团股份有限公司 | 一种主动式双向工作的气体实流检测系统及方法 |
| WO2019059795A1 (ru) * | 2017-09-20 | 2019-03-28 | Общество с ограниченной ответственностью "Нефтяные и Газовые Измерительные Технологии" | Способ поверки счетчика жидкости и устройство для его реализации |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3423988A (en) * | 1966-08-01 | 1969-01-28 | M & J Valve Co | Meter prover apparatus |
| US3668923A (en) * | 1970-06-19 | 1972-06-13 | M & J Valve Co | Meter proving method and apparatus |
| JPS51110558U (ja) * | 1975-03-04 | 1976-09-07 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3232090A (en) * | 1963-07-11 | 1966-02-01 | Edward W Walker | Pipeline station for selectively launching or receiving spheroids |
| GB1166850A (en) * | 1966-12-22 | 1969-10-08 | Gen Descaling Co Ltd | Improvements in and relating to Uni-Directional Meter Provers |
| US3638475A (en) * | 1970-04-09 | 1972-02-01 | M & J Valve Co | Meter-proving method and apparatus |
| US3720089A (en) * | 1971-06-16 | 1973-03-13 | Signet Controls Inc | Double ball meter prover system |
| US3738153A (en) * | 1971-08-24 | 1973-06-12 | Helmerich & Payne | Valveless prover |
| US3911724A (en) * | 1973-02-09 | 1975-10-14 | M & J Valve Co | Sphere launcher and meter prover apparatus and method |
| US3889708A (en) * | 1974-05-17 | 1975-06-17 | Chronister Dev Inc | Dual ball launch valve |
| USRE31432E (en) * | 1978-05-19 | 1983-11-01 | Flow Technology, Inc. | Apparatus and method for determining the characteristic of a flowmeter |
| US4537058A (en) * | 1982-07-06 | 1985-08-27 | Sensormedics Corporation | Volume calibration syringe |
| US4766759A (en) * | 1985-07-19 | 1988-08-30 | Calibron Systems, Inc. | Apparatus and method for determining the flow characteristic of a volumetric flowmeter |
| US5111682A (en) * | 1988-05-02 | 1992-05-12 | Flow Technology, Inc. | Apparatus and method for determining the flow characteristics of a volumetric flowmeter |
| US4947675A (en) * | 1988-11-14 | 1990-08-14 | Marathon Oil Company | Unidirectional pipe line prover |
| DE4209620C1 (de) * | 1992-03-25 | 1993-12-16 | Eppendorf Geraetebau Netheler | Verfahren zur Korrektur des Volumenfehlers ïV bei einem Pipettiersystem |
-
2003
- 2003-12-25 JP JP2003428602A patent/JP2005189014A/ja active Pending
-
2004
- 2004-07-22 US US10/581,605 patent/US20070119227A1/en not_active Abandoned
- 2004-07-22 CN CNA2004800391071A patent/CN1898537A/zh active Pending
- 2004-07-22 KR KR1020067014904A patent/KR20070000440A/ko not_active Ceased
- 2004-07-22 WO PCT/JP2004/010782 patent/WO2005064291A1/ja not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3423988A (en) * | 1966-08-01 | 1969-01-28 | M & J Valve Co | Meter prover apparatus |
| US3668923A (en) * | 1970-06-19 | 1972-06-13 | M & J Valve Co | Meter proving method and apparatus |
| JPS51110558U (ja) * | 1975-03-04 | 1976-09-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005189014A (ja) | 2005-07-14 |
| US20070119227A1 (en) | 2007-05-31 |
| CN1898537A (zh) | 2007-01-17 |
| KR20070000440A (ko) | 2007-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2005064291A1 (ja) | 基準体積管 | |
| BR112015020609B1 (pt) | sistema de medição de fluxo ultrassônico, e, método de medição ultrassônico | |
| CN103616313B (zh) | 一种气体密度在线测量方法 | |
| KR20060136410A (ko) | 기준 체적관 | |
| CN102007385A (zh) | 流量计检验方法和系统 | |
| JP2004003647A (ja) | ボールに直接組み込まれてなる流量ゲージを有するボールバルブ | |
| JP2014530357A (ja) | 小体積試験装置および流速測定のための方法 | |
| CN213397283U (zh) | 一种具有校准功能的气体超声波流量计 | |
| CN104903687B (zh) | 活塞校准仪 | |
| JP2008286761A (ja) | ピストンプルーバ | |
| JP2007101472A (ja) | 水道メータ試験装置 | |
| JP2008286765A (ja) | リーク検出方法 | |
| KR20110073011A (ko) | 이동식 유량계교정장치 및 이를 이용한 유량측정시스템 검사방법 | |
| JP3637988B2 (ja) | 流量計試験装置 | |
| KR20110077747A (ko) | 유량계 교정용 기준 체적관 | |
| CN108627437B (zh) | 实验用储层条件下气体微流量测定装置及方法 | |
| CN112556765A (zh) | 往复式气体流量计及其工作方法 | |
| CN100507469C (zh) | 扩展式体积管流量计量装置及实现方法 | |
| JP2008286764A (ja) | 多重流量検定システム | |
| JP2008215896A (ja) | バイディレクショナルプルーバ | |
| JP3521361B2 (ja) | 流量測定装置 | |
| JP3544111B2 (ja) | スモールボリュームプルーバの動作状況判定システム | |
| KR900003164B1 (ko) | 콤팩트(compact)피스톤 푸루버(prover)에 의한 유량계 교정장치 | |
| JPH11304572A (ja) | 基準体積管 | |
| KR101531020B1 (ko) | 프리런 구간이 요구되지 않는 양 방향 기준 체적관 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 200480039107.1 Country of ref document: CN |
|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1020067014904 Country of ref document: KR |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2007119227 Country of ref document: US Ref document number: 10581605 Country of ref document: US |
|
| WWP | Wipo information: published in national office |
Ref document number: 1020067014904 Country of ref document: KR |
|
| 122 | Ep: pct application non-entry in european phase | ||
| WWP | Wipo information: published in national office |
Ref document number: 10581605 Country of ref document: US |