CN203881412U - Device for fast calibrating differential pressure type liquidometer on working condition site - Google Patents

Device for fast calibrating differential pressure type liquidometer on working condition site Download PDF

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Publication number
CN203881412U
CN203881412U CN201420305607.6U CN201420305607U CN203881412U CN 203881412 U CN203881412 U CN 203881412U CN 201420305607 U CN201420305607 U CN 201420305607U CN 203881412 U CN203881412 U CN 203881412U
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China
Prior art keywords
pressure
differential pressure
pressure type
stop valve
fast
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CN201420305607.6U
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Chinese (zh)
Inventor
陈德伟
余宏伟
吴云峰
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ZHEJIANG ZHONGNING SILICON CO Ltd
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ZHEJIANG ZHONGNING SILICON CO Ltd
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Abstract

The utility model discloses a device for fast calibrating a differential pressure type liquidometer on a working condition site. The device comprises a portable air pressure type pressure calibrator, a pressure measurement fast conversion device, a first pressure taking pipe stop valve, a second pressure taking pipe stop valve, a first pressure taking device, a second pressure taking device, a differential pressure transmitter, a standard ampere-meter, an HART communicator and a direct-current power supply. On the working condition site, the portable air pressure type pressure calibrator and the pressure measurement fast conversion connecting device are utilized for calibrating the differential pressure type liquidometer. According to the device, in daily maintenance, the situation that zero-point calibration needs to be carried out on the site again after the differential pressure type liquidometer is calibrated and mounted on the site is overcome, and a pressing device is fast and convenient to connect. In detection, whether the differential pressure type liquidometer on the working condition site is normal or not and whether deviation exists or nor are evaluated, and the advantages of being fast and convenient and easy to use are achieved.

Description

The device of the on-the-spot quickly calibrated differential pressure type level gauge of a kind of operating mode
Technical field
The utility model discloses a kind of device at the on-the-spot quickly calibrated differential pressure type level gauge of operating mode.
Background technology
In Chemical Manufacture, often carry out level gauging, to one of conventional instrument of the level gauging of seal-off pressure container, be differential pressure type level gauge.Its conventional pressure tappings connected mode has pressure pipe to be threaded to be connected with bellows flange.
The normal calibration of liquid level gauge is: adopt and first from process unit, pull down fluid level transmitter, fetching transmitter calibrates at Instrumentation Laboratory, because installation site meetings different from adjustment position cause Zero change, at the complete scene of being installed to of adjustment, need again carry out adjustment at zero point.According to < < pressure unit vertification regulation > > JJG882-2004, calibrate.If pressure tappings is film close that seal flange connects doing conventional flange diaphragm, kapillary outward appearance, after insulation resistance checks, the positive and negative pressure chamber of two flange liquid level transmission devices and flange center's line to be put in the same horizontal line, then with air source generator, suppress adjustment.According to rules, stipulate: 20 ± 5 ℃ of environment temperatures, relative humidity 45 ~ 75%, machinery-free vibration and the external magnetic field of normally working without impact.On-the-spot in actual operating mode, when transmitter is installed, considered that machinery-free vibrates and the factor of external magnetic field, and the requirement of relative temperature is relatively wide in range, in fact needs only satisfied temperature condition, at the scene liquid level gauge is calibrated and is fine.The calibration cycle of general liquid level gauge is 1 year.Select the more suitable spring and autumn of temperature to carry out field calibration.The field calibration of liquid level measurement and control system is related to accuracy of detection and the reliability of instrument system.
Summary of the invention
The object that the utility model solves is to overcome the complete scene of being installed to of adjustment need again carry out adjustment at zero point, and the device of the on-the-spot quickly calibrated differential pressure type level gauge of a kind of operating mode is provided.
A kind of device at the on-the-spot quickly calibrated differential pressure type level gauge of operating mode comprises Portable gas die mould pressure testers, pressure measurement quick switching device, the first pressure pipe stop valve, the second pressure pipe stop valve, the first pressure obtaning device, the second pressure obtaning device, liquid level transducer of differential pressure type, standard amperemeters, HART communicator, direct supply;
Portable gas die mould pressure testers is connected with pressure measurement quick switching device, pressure measurement quick switching device is connected with the second pressure obtaning device, the first pressure obtaning device left side is provided with the first pressure pipe stop valve, the second pressure obtaning device left side is provided with the second pressure pipe stop valve, the first pressure obtaning device, the second pressure obtaning device are connected with differential pressure transmitter by pressure pipe, differential pressure transmitter, standard amperemeters and direct supply form detection electric signal loop, detect on electric signal loop and articulate HART communicator.
The first described pressure obtaning device, the second pressure obtaning device are pressure pipe threaded connector or pressure flange, and described pressure measurement quick switching device is connected with pressure pipe threaded connector by a quick connector, or are connected with pressure flange by a quick connector.
Described direct supply is 24V direct supply.
The advantage of the utility model method: the utility model device, in ordinary maintenance, overcomes the complete scene of being installed to of adjustment and need again carry out adjustment at zero point, pressure device connects fast, convenient.For inspection, whether whether the on-the-spot differential pressure type level gauge of evaluation operating mode is normal, exist deviation to have fast, easy advantage.
Accompanying drawing explanation
Fig. 1 is the device field calibration connection diagram at the on-the-spot quickly calibrated differential pressure type level gauge of operating mode.
In figure, Portable gas die mould pressure testers 1, pressure measurement quick switching device 2, the first pressure pipe stop valve 3, the first pressure obtaning device 4, the second pressure pipe stop valve 5, the second pressure obtaning devices 6, differential pressure transmitter 7, standard amperemeters 8, HART communicator 9, direct supply 10.
Embodiment
As shown in Figure 1, a kind of device at the on-the-spot quickly calibrated differential pressure type level gauge of operating mode comprises Portable gas die mould pressure testers 1, pressure measurement quick switching device 2, the first pressure pipe stop valve 3, the second pressure pipe stop valve 5, the first pressure obtaning device 4, the second pressure obtaning device 6, liquid level transducer of differential pressure type 7, standard amperemeters 8, HART communicator 9, direct supply 10;
Portable gas die mould pressure testers 1 is connected with pressure measurement quick switching device 2, pressure measurement quick switching device 2 is connected with the second pressure obtaning device 6, the first pressure obtaning device 4 left sides are provided with the first pressure pipe stop valve 3, the second pressure obtaning device 6 left sides are provided with the second pressure pipe stop valve 5, the first pressure obtaning device 4, the second pressure obtaning device 6 are connected with liquid level transducer of differential pressure type 7 by pressure pipe, liquid level transducer of differential pressure type 7, standard amperemeters 8 and direct supply 10 form detection electric signal loop, detect on electric signal loop and articulate HART communicator.
Described the first pressure obtaning device 4, the second pressure obtaning device 6 are pressure pipe threaded connector or pressure flange, and described pressure measurement quick switching device 2 is connected with pressure pipe threaded connector by a quick connector, or is connected with pressure flange by a quick connector.
Described direct supply 10 is 24V direct supply.
Described Portable gas die mould pressure testers 1 can be DPI 610PC Portable gas die mould pressure testers.
The calibration steps course of work of the present utility model is as follows:
1) close the first pressure pipe stop valve 3 and the second pressure pipe stop valve 5 of pressure pipe;
2) unclamp the first pressure obtaning device 4 and the second pressure obtaning device 6 being connected with stop valve; But still in former height;
3) check that whether pressure flange diaphragm, kapillary outward appearance be good;
4) in former measuring circuit, connect into a standard amperemeters 8
5) on measuring circuit, hang up HART communicator 9, carry out adjustment at zero point, the inspection of range;
6) utilize the Portable gas die mould pressure testers 1 in dashed rectangle to produce standard pressure, by pressure measurement quick switching device 2, be connected with the second pressure obtaning device 6, by 0,25%, 50%, 75% of range, 100% suppresses;
7) read the reading of the standard amperemeters 8 in the process of suppressing;
8) press 100%, 75%, 50%, 25% of range, 0% release, and read the reading of standard amperemeters 8;
9) according to standard amperemeters 8 readings of step 6), step 7) and step 8) and standard 4 ~ 20mA electric current, carry out computational analysis, whether decision table meter is normal, whether has deviation;
10) after checking, can rapidly instrument be resetted.
On-the-spot in operating mode, utilize Portable gas die mould pressure testers and for different pressure tappings connected modes: pressure pipe is threaded and is connected with bellows flange, the physical size of showing according to scene, making pressure measurement quick switching device.This quick switching device is connected and combines with flange with pressure pipe threaded connector or quick connector by a quick connector.By Portable gas die mould pressure testers, produce standard pressure, the standard pressure of generation is changed fast coupling arrangement with pressure measurement and is connected with differential pressure transmitter, and differential pressure transmitter is suppressed.Its electric signal loop utilizes original loop, is connected in series a standard amperemeters in former loop, to calibrate its actual output current value.This field calibration method is in ordinary maintenance, and for inspection, whether whether the on-the-spot differential pressure type level gauge of evaluation operating mode is normal, exist deviation to have fast, easy advantage.A kind of fast and convenient field calibration method is provided.

Claims (3)

1. at the on-the-spot quickly calibrated differential pressure type level gauge device of operating mode, it is characterized in that comprising Portable gas die mould pressure testers (1), pressure measurement quick switching device (2), the first pressure pipe stop valve (3), the second pressure pipe stop valve (5), the first pressure obtaning device (4), the second pressure obtaning device (6), differential pressure transmitter (7), standard amperemeters (8), HART communicator (9), direct supply (10);
Portable gas die mould pressure testers (1) is connected with pressure measurement quick switching device (2), pressure measurement quick switching device (2) is connected with the second pressure obtaning device (6), the first pressure obtaning device (4) left side is provided with the first pressure pipe stop valve (3), the second pressure obtaning device (6) left side is provided with the second pressure pipe stop valve (5), the first pressure obtaning device (4), the second pressure obtaning device (6) is connected with differential pressure transmitter (7) by pressure pipe, differential pressure transmitter (7), standard amperemeters (8) and direct supply (10) form detection electric signal loop, detect on electric signal loop and articulate HART communicator.
2. according to claim 1 at the on-the-spot quickly calibrated differential pressure type level gauge device of operating mode, it is characterized in that described the first pressure obtaning device (4), the second pressure obtaning device (6) are pressure pipe threaded connector or pressure flange, described pressure measurement quick switching device (2) is connected with pressure pipe threaded connector by a quick connector, or is connected with pressure flange by a quick connector.
3. according to claim 1 at the on-the-spot quickly calibrated differential pressure type level gauge device of operating mode, it is characterized in that described direct supply (10) is 24V direct supply.
CN201420305607.6U 2014-06-10 2014-06-10 Device for fast calibrating differential pressure type liquidometer on working condition site Active CN203881412U (en)

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CN201420305607.6U CN203881412U (en) 2014-06-10 2014-06-10 Device for fast calibrating differential pressure type liquidometer on working condition site

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CN201420305607.6U CN203881412U (en) 2014-06-10 2014-06-10 Device for fast calibrating differential pressure type liquidometer on working condition site

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105606848A (en) * 2015-08-18 2016-05-25 浙江中烟工业有限责任公司 Online detection method for differential pressure transmitting unit of anemometer
CN108168647A (en) * 2018-01-16 2018-06-15 中科睿凌江苏低温设备有限公司 The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side
CN110174162A (en) * 2019-05-13 2019-08-27 南京罕华流体技术有限公司 A kind of industry measurement operating condition calibrating installation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105606848A (en) * 2015-08-18 2016-05-25 浙江中烟工业有限责任公司 Online detection method for differential pressure transmitting unit of anemometer
CN108168647A (en) * 2018-01-16 2018-06-15 中科睿凌江苏低温设备有限公司 The pressure stable-pressure device of low temperature LPG storage tank differential pressure type level gauge high-pressure side
CN110174162A (en) * 2019-05-13 2019-08-27 南京罕华流体技术有限公司 A kind of industry measurement operating condition calibrating installation
CN110174162B (en) * 2019-05-13 2020-12-29 南京罕华流体技术有限公司 Working condition calibration device for industrial metering

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