CN109489775B - Calibration device and calibration method for anti-vibration anti-electromagnetic interference flowmeter - Google Patents
Calibration device and calibration method for anti-vibration anti-electromagnetic interference flowmeter Download PDFInfo
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- CN109489775B CN109489775B CN201811269184.6A CN201811269184A CN109489775B CN 109489775 B CN109489775 B CN 109489775B CN 201811269184 A CN201811269184 A CN 201811269184A CN 109489775 B CN109489775 B CN 109489775B
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- 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
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Abstract
The invention discloses a calibration device and a calibration method of an anti-vibration anti-electromagnetic interference flowmeter, which comprise a measuring pipeline, a vibrating motor, an eccentric block, a shockproof spring and a supporting piece, wherein an inlet of a flowmeter to be calibrated is connected with the measuring pipeline through flange flexible connection, the eccentric block is connected with the vibrating motor, and the eccentric block is contacted with one side of the measuring pipeline; the anti-vibration spring is arranged on the other side of the measuring pipeline opposite to the eccentric block, one end of the anti-vibration spring is connected with the measuring pipeline, the other end of the anti-vibration spring is fixed by the supporting piece, the anti-vibration spring is basically vertical to the measuring pipeline as a whole, and the anti-vibration spring is in a compressed or natural extension state. The calibration device can simulate the vibration and electromagnetic interference environment in the working process of the flowmeter, the flowmeter calibrated in the anti-vibration anti-electromagnetic interference flowmeter calibration device has certain anti-vibration and electromagnetic interference performance, and the normal working precision and service life of the flowmeter are improved.
Description
Technical Field
The invention relates to the field of flowmeter metering, in particular to a calibration device and a calibration method of an anti-vibration anti-electromagnetic interference flowmeter.
Background
Most of the conventional flowmeters are manufactured according to standard specifications, and manufacturers provide a flow curve table for users or give a specified flow coefficient according to a specified flow meter calculation formula. If the user loses the factory flow curve table or the temperature, pressure and medium properties are different when the user uses the meter, the meter must be calibrated for accurate measurement and convenient use. Even a calibrated flow meter should be calibrated again when wear is large due to long-term use.
Most of the existing flowmeter calibration devices are water flow standard calibration devices and air flow calibration devices, the flow is calibrated under the condition of an interference-free environment, for example, when the static mass method is used for calibrating the liquid flow, water in a water tank is pumped into a pressure stabilizing container through a filter under the action of a liquid pump, and enters a test pipeline after high-frequency pulsation is eliminated through the pressure stabilizing container. The pressure stabilizing measure is the primary consideration during the verification design, because whether the pressure of the device is stable or not is directly related to the stability degree of the flow in the primary test process, and the reliability of the flow meter data detected by the device is directly influenced. However, the flow meter product qualified by the conventional method is often poor in performance, large in measurement error, poor in data stability and the like in a complex and variable environment on site, and the normal use of the flow meter is seriously influenced.
Disclosure of Invention
In view of the technical problems in the prior art, the present invention provides a calibration apparatus and a calibration method for an anti-vibration anti-electromagnetic interference flow meter. A vibration interference link and an electromagnetic interference link are added in the calibration process, and the complicated and changeable working conditions of a production field can be simulated to the maximum extent, so that the calibrated flowmeter has better vibration resistance and electromagnetic interference resistance.
In order to solve the problems, the technical scheme of the invention is as follows:
a calibration device of an anti-vibration anti-electromagnetic interference flowmeter comprises a measuring pipeline, a vibrating motor, an eccentric block, an anti-vibration spring and a supporting piece, wherein an inlet of a flowmeter to be calibrated is connected with the measuring pipeline through flange flexible connection, the eccentric block is connected with the vibrating motor, and the eccentric block is in contact with one side of the measuring pipeline;
the anti-vibration spring is arranged on the other side of the measuring pipeline opposite to the eccentric block, one end of the anti-vibration spring is connected with the measuring pipeline, the other end of the anti-vibration spring is fixed by the supporting piece, the anti-vibration spring is basically vertical to the measuring pipeline as a whole, and the anti-vibration spring is in a compressed or natural extension state.
Utilize the high-speed centrifugal force that produces of rotatory centrifugal force that produces of axle and eccentric block to obtain vibrational force, adjust vibrating motor and can change the vibration frequency of motor, adjust the eccentric block and can change the vibration range, adjust converter and eccentric block and obtain the vibration displacement and the frequency of demand, and then furthest simulation concrete production operating mode. When the eccentric block applies vibration to the measuring pipeline, the pipeline is easy to vibrate ceaselessly, and then more complex interference effect is exerted on the liquid in the pipeline, which is not beneficial to manual control, so that the eccentric block and the shockproof spring are distributed at two sides of the measuring pipeline, and when the eccentric block applies acting force to the measuring pipeline, the shockproof spring applies reverse acting force to the measuring pipeline, on one hand, the measuring pipeline only vibrates in a reciprocating manner under the action of the eccentric block and the measuring spring, so that the liquid in the pipeline is driven to vibrate, and the vibration of the measuring pipeline is prevented; on the other hand, the shockproof spring exerts certain restoring force on the measuring pipeline, so that the action of the eccentric block always acts on the measuring pipeline, and the continuous existence of vibration interference is ensured.
The flowmeter to be marked is connected with the measuring pipeline, and the measuring pipeline can drive the flowmeter to be marked to vibrate when vibrating, so that the flowmeter to be marked is not beneficial to accurate marking of the flowmeter to be marked, and the flowmeter to be marked and the measuring pipeline are in flexible connection to reduce the vibration of the flowmeter to be marked. Meanwhile, the existence of the flexible connection can also reduce the self vibration of the measuring pipeline.
Preferably, the shockproof spring is made of stainless steel, the outer diameter of the spring is 25-35mm, the diameter of the spring wire is 2.5-3.5mm, and the length of the spring is 25-35 cm.
Preferably, the flange flexible connection is DN50, DN80, DN100, DN150, DN200 or DN 300.
Preferably, the distance between the anti-vibration spring and the eccentric block and the flowmeter to be calibrated is 30-50 cm. The vibration of the measuring pipeline is reduced conveniently, so that the vibration of the flowmeter to be calibrated is reduced.
Preferably, the vibration motor and the eccentric block are positioned below the measuring pipeline, and the anti-vibration spring is positioned above the measuring pipeline.
Preferably, the vibration motor is an alternating current three-phase vibration motor of MVE 60/3, the rotating speed is 2900 rpm, and the frequency is 50 HZ. The vibration frequency can be adjusted according to the vibration requirement.
Preferably, the calibration device further comprises an adjustable resistance box, a first electromagnetic coil and a second electromagnetic coil, wherein the first electromagnetic coil and the second electromagnetic coil are connected in series, are respectively installed on the upper side and the lower side of the flowmeter to be calibrated, and are sequentially connected with the adjustable resistance box and the power supply. The first electromagnetic coil and the second electromagnetic coil form an alternating magnetic field after being electrified, and the magnetic field intensity is changed by adjusting the resistance of the series resistance box.
The external magnetic field can generate a certain interference effect on the detection of the flowmeter, the resistance of the flowmeter to electromagnetic interference is improved by increasing the electromagnetic interference in the verification process, and the capability of the flowmeter to cope with complex and variable environments is further improved.
Further preferably, the first electromagnetic coil is fixed to the support member.
Preferably, the flowmeter to be calibrated is a balance flowmeter, a wedge-shaped flowmeter, a metal rotor flowmeter, an electromagnetic flowmeter, a vortex shedding flowmeter or a mass flowmeter.
Preferably, the calibration device further comprises a standard flowmeter, the standard flowmeter is connected with the flowmeter to be calibrated in series, and the pipeline where the standard flowmeter is located is the same as the flowmeter to be calibrated. The whole checking device uses a standard meter water flow checking method and a quality water flow checking method.
The standard flowmeter and the flowmeter to be calibrated apply the same vibration interference and electromagnetic interference to detect the performance of the flowmeter, and the flowmeter can be more accurately verified.
A calibration method for an anti-vibration anti-electromagnetic interference flowmeter comprises the following steps:
1) connecting each part of the calibration device where the flowmeter to be calibrated and the standard flowmeter are positioned;
2) working liquid is introduced into the measuring pipeline, the vibration motor and the eccentric block are adjusted to obtain required frequency and amplitude, and when acting force is applied to the measuring pipeline, the liquid flowing condition adaptive to the actual working condition is obtained;
3) adjusting the resistance of the adjustable resistance box, and applying the same alternating magnetic field to the flowmeter to be calibrated and the standard flowmeter by adopting a first electromagnetic flowmeter and a second electromagnetic flowmeter;
4) and verifying the flowmeter to be marked according to the counts of the standard flowmeter and the flowmeter to be marked.
The invention has the beneficial effects that:
the calibration device can simulate the vibration and electromagnetic interference environment in the working process of the flowmeter, the flowmeter calibrated in the anti-vibration anti-electromagnetic interference flowmeter calibration device has certain anti-vibration and electromagnetic interference performance, and the normal working precision and service life of the flowmeter are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the structure of the anti-vibration anti-electromagnetic interference flow meter calibration apparatus of the present invention.
The device comprises an adjustable resistance box 1, an adjustable resistance box 2, a first electromagnetic coil 3, an eccentric block 4, a vibration motor 5, a flowmeter to be marked 6, a flange flexible connection 7, a shockproof spring 8, a support piece 9 and a measuring pipeline.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, the calibration apparatus for the anti-vibration anti-electromagnetic interference flow meter comprises a measuring pipeline 9, a vibrating motor 4, an eccentric block 3, a shockproof spring 7 and a support member 8, wherein an inlet of a flow meter 5 to be calibrated is connected with the measuring pipeline 9 through a flange flexible connection 6, the eccentric block 3 is connected with the vibrating motor 4, and the eccentric block 3 is in contact with one side of the measuring pipeline 9;
the anti-vibration spring 7 is arranged on the other side of the measuring pipeline 9 opposite to the eccentric block 3, for example, the vibration motor 4 and the eccentric block 3 are positioned below the measuring pipeline 9, the anti-vibration spring 7 is positioned above the measuring pipeline 9, or the vibration motor 4 and the eccentric block 3 are positioned on the left side of the measuring pipeline 9, and the anti-vibration spring 7 is positioned on the right side of the measuring pipeline 9.
One end of the anti-vibration spring 7 is connected with the measuring pipeline 9, and the other end is fixed by the supporting piece 8, so that the anti-vibration spring 7 is basically vertical to the measuring pipeline 9 as a whole, and the anti-vibration spring 7 is in a compressed or natural extension state. The shockproof spring 7 is made of stainless steel, the outer diameter of the spring is 25-35mm, the diameter of a spring wire is 2.5-3.5mm, and the length of the spring is 25-35 cm. The flange flexible connection is DN50, DN80, DN100, DN150, DN200 or DN 300.
The distance between the shockproof spring 7 and the eccentric block 3 and the flowmeter 5 to be calibrated is 30-50 cm.
The vibration motor is an alternating current three-phase vibration motor of MVE 60/3, the rotating speed is 2900 r/min, and the frequency is 50 HZ. The vibration frequency can be adjusted according to the vibration requirement.
The calibration device of the anti-vibration anti-electromagnetic interference flowmeter further comprises an adjustable resistance box 1, a first electromagnetic coil 2 and a second electromagnetic coil, wherein the first electromagnetic coil 2 and the second electromagnetic coil are connected in series, are respectively installed on the upper side and the lower side of the flowmeter 5 to be calibrated, and are sequentially connected with the adjustable resistance box 1 and a power supply. The first electromagnetic coil 2 is fixed to the support member 8.
The flowmeter to be calibrated can be a balance flowmeter, a wedge-shaped flowmeter, a metal rotor flowmeter, an electromagnetic flowmeter, a vortex shedding flowmeter or a mass flowmeter. In order to more accurately detect the flowmeter to be marked, the calibration device further comprises a standard flowmeter, the standard flowmeter is connected with the flowmeter to be marked in series, and a pipeline where the standard flowmeter is located is the same as the flowmeter to be marked. The whole checking device uses a standard meter water flow checking method and a quality water flow checking method. The vibration motors of the pipelines where the flowmeter to be calibrated and the standard flowmeter are located are controlled by the same controller to be at the same frequency, the eccentric blocks are adjusted to have the same amplitude, and the adjustable resistance boxes are adjusted to have the same resistance to generate the same alternating magnetic field. The standard flowmeter and the flowmeter to be calibrated are in the same working environment, so that the calibration accuracy of the flowmeter to be calibrated is improved.
The calibration method using the anti-vibration anti-electromagnetic interference flowmeter comprises the following steps:
1) connecting each part of the calibration device where the flowmeter to be calibrated and the standard flowmeter are positioned;
2) working liquid is introduced into the measuring pipeline, the vibration motor and the eccentric block are adjusted to obtain required frequency and amplitude, and when acting force is applied to the measuring pipeline, the liquid flowing condition adaptive to the actual working condition is obtained;
3) adjusting the resistance of the adjustable resistance box, and applying the same alternating magnetic field to the flowmeter to be calibrated and the standard flowmeter by adopting a first electromagnetic flowmeter and a second electromagnetic flowmeter;
4) and verifying the flowmeter to be marked according to the counts of the standard flowmeter and the flowmeter to be marked.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. The utility model provides a calibration equipment of anti-vibration anti-electromagnetic interference flowmeter which characterized in that: the device comprises a measuring pipeline, a vibrating motor, an eccentric block, a shockproof spring and a supporting piece, wherein an inlet of a flowmeter to be marked is connected with the measuring pipeline through flange flexible connection, the eccentric block is connected with the vibrating motor, and the eccentric block is in contact with one side of the measuring pipeline;
the anti-vibration spring is arranged on the other side of the measuring pipeline opposite to the eccentric block, one end of the anti-vibration spring is connected with the measuring pipeline, the other end of the anti-vibration spring is fixed by the supporting piece, the anti-vibration spring is basically vertical to the measuring pipeline as a whole, and the anti-vibration spring is in a compressed or natural extension state;
the vibration motor and the eccentric block are positioned below the measuring pipeline, and the shockproof spring is positioned above the measuring pipeline;
the calibration device also comprises an adjustable resistance box, a first electromagnetic coil and a second electromagnetic coil, wherein the first electromagnetic coil and the second electromagnetic coil are connected in series, are respectively arranged at the upper side and the lower side of the flowmeter to be calibrated, and are sequentially connected with the adjustable resistance box and a power supply;
the calibration device further comprises a standard flowmeter, the standard flowmeter is connected with the flowmeter to be calibrated in series, and a pipeline where the standard flowmeter is located is the same as the flowmeter to be calibrated.
2. The verification device according to claim 1, wherein: the shockproof spring is made of stainless steel, the outer diameter of the spring is 25-35mm, the diameter of the spring wire is 2.5-3.5mm, and the length of the spring is 25-35 cm.
3. The verification device according to claim 1, wherein: the distance between the shockproof spring and the eccentric block and the flowmeter to be marked is 30-50 cm.
4. The verification device according to claim 1, wherein: the vibration motor is an alternating current three-phase vibration motor, the rotating speed is 2900 rpm, and the frequency is 50 HZ.
5. The verification device according to claim 1, wherein: the first electromagnetic coil is fixed to the support member.
6. The verification device according to claim 1, wherein: the flowmeter to be calibrated is a balance flowmeter, a wedge-shaped flowmeter, a metal rotor flowmeter, an electromagnetic flowmeter, a vortex shedding flowmeter or a mass flowmeter.
7. A calibration method for an anti-vibration anti-electromagnetic interference flowmeter is characterized by comprising the following steps: using a verification device as claimed in any of claims 1-6;
the method comprises the following steps:
1) connecting each part of the calibration device where the flowmeter to be calibrated and the standard flowmeter are positioned;
2) working liquid is introduced into the measuring pipeline, the vibration motor and the eccentric block are adjusted to obtain required frequency and amplitude, and when acting force is applied to the measuring pipeline, the liquid flowing condition adaptive to the actual working condition is obtained;
3) adjusting the resistance of the adjustable resistance box, and applying the same alternating magnetic field to the flowmeter to be calibrated and the standard flowmeter by adopting a first electromagnetic coil and a second electromagnetic coil;
4) and verifying the flowmeter to be marked according to the counts of the standard flowmeter and the flowmeter to be marked.
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| CN201811269184.6A CN109489775B (en) | 2018-10-29 | 2018-10-29 | Calibration device and calibration method for anti-vibration anti-electromagnetic interference flowmeter |
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| JP2000111380A (en) * | 1998-10-01 | 2000-04-18 | Mitsubishi Heavy Ind Ltd | Coriolis-type mass flowmeter |
| US8005635B2 (en) * | 2007-08-14 | 2011-08-23 | Ching-Fang Lin | Self-calibrated azimuth and attitude accuracy enhancing method and system (SAAAEMS) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5316444A (en) * | 1993-04-29 | 1994-05-31 | Wicnienski Michael F | Pump control and method of pumping |
| US7688057B2 (en) * | 2007-07-10 | 2010-03-30 | Rosemount Inc. | Noise diagnosis of operating conditions for an electromagnetic flowmeter |
| CN101701841A (en) * | 2009-11-20 | 2010-05-05 | 天津大学 | Experimental device and method for researching influence of periodic vibration of pipeline on flow meter |
| CN204535824U (en) * | 2015-04-09 | 2015-08-05 | 山西省计量科学研究院 | The testing equipment of electromagnetic compatibility real stream proving flowmeter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000111380A (en) * | 1998-10-01 | 2000-04-18 | Mitsubishi Heavy Ind Ltd | Coriolis-type mass flowmeter |
| US8005635B2 (en) * | 2007-08-14 | 2011-08-23 | Ching-Fang Lin | Self-calibrated azimuth and attitude accuracy enhancing method and system (SAAAEMS) |
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