CN109900426A - Verify the accurate method of low pressure gauge pressure - Google Patents
Verify the accurate method of low pressure gauge pressure Download PDFInfo
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- CN109900426A CN109900426A CN201910235451.6A CN201910235451A CN109900426A CN 109900426 A CN109900426 A CN 109900426A CN 201910235451 A CN201910235451 A CN 201910235451A CN 109900426 A CN109900426 A CN 109900426A
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Abstract
The accurate method that the present invention verifies low pressure gauge pressure includes: that standard scale and calibrated meter are connected with calibration equipment respectively, pressure source provides rated pressure to filter pressure relief valve, operating pressure needed for valuator will be reduced into the pressure of filter pressure relief valve by adjusting filter pressure relief valve, 5 pressure checking points are no less than according to uniformly choosing in the range range of pressure values of calibrated meter, valuator is adjusted by increasing or reducing direction output pressure signal, the pressure value of standard scale refers in each pressure checking point, close shut-off valve, adjust the trimming handle on pressure micro actuator, Precision trimming handle and relief valve, so that the pressure value of standard scale is stablized in pressure measurement point, then the pressure value of calibrated meter is observed, when calibrated meter is when the elementary error of the pressure value of pressure checking point and variation are no more than the allowable error that accuracy of instrument requires, It does not need to be adjusted calibrated meter, otherwise just needs to be adjusted calibrated meter.
Description
Technical field
The present invention relates to the methods of verification low pressure gauge pressure, more particularly to a kind of the accurate of verification low pressure gauge pressure
Method.
Background technique
In pressure gauge verifying work, the generally all bad verification of the instrument of low pressure range, reason is mainly to provide pressure
Mode, the most commonly used is hand-held pressure pump, hand-held pressure pump is in up stroke pressure process, and boosting is slow, and pressure oscillation is big,
In down stroke pressure leak process, the bad control of pressure.In order to solve these problems, determine that studying a kind of method makes pressure gauge school
It tests in work, provides pressure quickly, steadily, precisely.
Summary of the invention
Present invention purpose be to solve boosting present in existing verification low pressure instrument is slow, pressure oscillation is big and
The problem of pressure bad control, and a kind of accurate method for verifying low pressure gauge pressure is provided.
In order to complete present invention purpose, the application uses following technical scheme:
A kind of accurate method of verification low pressure gauge pressure of the invention, in which: method includes the following steps:
(a), standard scale and calibrated meter are connected with calibration equipment respectively, the calibration equipment include: the threeway being sequentially connected,
Pressure micro actuator, shut-off valve, valuator, filter pressure relief valve and pressure source, equipped with Precision trimming handle, micro- on pressure micro actuator
Handle and relief valve, standard scale and calibrated meter is adjusted to be connected respectively with two ports of threeway；
(b), pressure source provides rated pressure to filter pressure relief valve, will enter filter by adjusting filter pressure relief valve
Operating pressure needed for the pressure of pressure reducing valve reduces to valuator；
(c), in the range range of pressure values of calibrated meter uniformly choose be no less than 5 pressure checking points, to calibrated meter into
Row verification adjusts the pressure checking that valuator makes its output pressure reach calibrated meter and presses force value, closes shut-off valve；
(d), trimming handle, Precision trimming handle and the relief valve on pressure micro actuator are adjusted, so that the pressure of standard scale
Value is stablized on each pressure checking point, the pressure value of calibrated meter is then observed, when calibrated meter is in the pressure value of pressure checking point
Elementary error and be deteriorated be no more than accuracy of instrument require allowable error when, do not need to be adjusted calibrated meter, otherwise
It needs to be adjusted calibrated meter；
(e), step (c) and (d) are repeated, by pressure checking point selected in calibrated meter pressure range, by increasing or reducing
Direction verifies completion point by point；
(f), in a pressure range for adjusting above-mentioned calibrated meter, if the calibrated meter is in a certain pressure checking point because super
Difference carried out adjustment, repeated step (c) and step (d), until in said one pressure range, which is not being adjusted
In the state of whole, reach the elementary error of the pressure value of its pressure checking point and be deteriorated no more than the permission of accuracy of instrument requirement
Until error, the verification of the calibrated meter terminates.
The accurate method of a kind of verification low pressure gauge pressure of the invention, in which: the accuracy of instrument requirement is 0.05%
F.S。
The accurate method of a kind of verification low pressure gauge pressure of the invention, in which: five pressure schools are selected in step (c)
It tests a little, they are respectively 0,0.25* range pressure value, 0.5* range pressure value, 0.75* range pressure value and range pressure value.
The accurate method of a kind of verification low pressure gauge pressure of the invention, in which: the standard scale, calibrated meter, threeway, pressure
It is connected between power micro actuator, shut-off valve, valuator, filter pressure relief valve and pressure source by connecting tube.
The accurate method of a kind of verification low pressure gauge pressure of the invention, in which: the connecting tube is the nylon of diameter 4mm
Pipe.
The accurate method of a kind of verification low pressure gauge pressure of the invention, in which: the rated pressure is 800KPa.
A kind of accurate method of verification low pressure gauge pressure of the invention is compared with existing method of calibration, the side of the application
Method has many advantages, such as that simple to operate, boosting is fast, pressure oscillation is small and pressure is easy to control.
The accurate method of present invention verification low pressure gauge pressure is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is to carry out showing for verification low pressure instrument connection relationship with the accurate method of verification low pressure gauge pressure of the invention
It is intended to.
In Fig. 1, label 1 is standard scale；Label 2 is threeway；Label 3 is pressure micro actuator；Label 4 is shut-off valve；Mark
Numbers 5 be valuator；Label 6 is filter pressure relief valve；Label 7 is pressure source；Label 8 is calibrated meter；Label 9 is connecting tube；Mark
Numbers 10 be Precision trimming handle；Label 11 is trimming handle；Label 12 is relief valve.
Specific embodiment
As shown in Figure 1, the accurate method of verification low pressure gauge pressure of the invention the following steps are included:
(a), standard scale 1 and calibrated meter 8 are connected with calibration equipment respectively, which includes: three be sequentially connected
Lead to 2, pressure micro actuator 3, shut-off valve 4, valuator 5, filter pressure relief valve 6 and pressure source 7, precision is housed on pressure micro actuator 3
Trimming handle 10, trimming handle 11 and relief valve 12, standard scale 1 and calibrated meter 8 are connected with two ports of threeway 2 respectively, mark
Lead between quasi- table 1, calibrated meter 8, threeway 2, pressure micro actuator 3, shut-off valve 4, valuator 5, filter pressure relief valve 6 and pressure source 7
It crosses connecting tube 9 to be connected, which is the nylon tube of diameter 4mm；
(b), pressure source 7 provides the rated pressure that pressure is 800KPa to filter pressure relief valve 6, is subtracted by adjusting filter
Operating pressure needed for the pressure for entering filter pressure relief valve 6 is reduced to valuator 5 by pressure valve 6；
(c), five pressure measurement points are selected in the range pressure value of calibrated meter 8, they are respectively 0,0.25* range pressure
Force value, 0.5* range pressure value, 0.75* range pressure value and range pressure value, verify calibrated meter 8, adjust valuator 5
So that its output pressure reaches 8 pressure checking of calibrated meter and presses force value, shut-off valve 4 is closed；
(d), trimming handle 11, Precision trimming handle 10 and the relief valve 12 on pressure micro actuator 3 are adjusted, so that standard scale
1 pressure value is stablized on its pressure checking point, the pressure value of calibrated meter 8 is then observed, when calibrated meter 8 is in pressure checking point
When the elementary error and variation of pressure value are no more than the allowable error that accuracy of instrument requires, do not need to be adjusted calibrated meter 8,
Otherwise it just needs to be adjusted calibrated meter 8；
(e), step (c) and (d) are repeated, by five pressure checking points selected in calibrated meter pressure range, by increasing or
Reduce direction and verifies completion point by point；
(f), in a pressure range for adjusting above-mentioned calibrated meter 8, if the calibrated meter 8 a certain pressure checking point because
It is overproof to carry out adjustment, repeat step (c) and step (d), until in said one pressure range, the calibrated meter 8
Under unadjusted state, reaches the elementary error of the pressure value of its pressure checking point and be deteriorated no more than accuracy of instrument requirement
Until allowable error, the verification of the calibrated meter 8 terminates, and accuracy of instrument requirement is 0.05%F.S.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (6)
1. a kind of accurate method for verifying low pressure gauge pressure, it is characterised in that: method includes the following steps:
(a), standard scale (1) and calibrated meter (8) are connected with calibration equipment respectively, which includes: three be sequentially connected
Logical (2), pressure micro actuator (3), shut-off valve (4), valuator (5), filter pressure relief valve (6) and pressure source (7), pressure micro actuator
(3) equipped with Precision trimming handle (10), trimming handle (11) and relief valve (12) on, standard scale (1) and calibrated meter (8) respectively with
Two ports of threeway (2) are connected；
(b), pressure source (7) provides rated pressure to filter pressure relief valve (6), will be entered by adjusting filter pressure relief valve (6)
Operating pressure needed for the pressure of filter pressure relief valve (6) reduces to valuator (5)；
(c), it is uniformly chosen in the range range of pressure values of calibrated meter (8) and is no less than 5 pressure checking points, to calibrated meter (8)
It is verified, adjusts the pressure checking that valuator (5) make its output pressure reach calibrated meter (8) and press force value, close cut-off
Valve (4)；
(d), trimming handle (11), Precision trimming handle (10) and the relief valve (12) on pressure micro actuator (3) are adjusted, so that mark
The pressure value of quasi- table (1) is stablized on each pressure checking point, the pressure value of calibrated meter (8) is then observed, when calibrated meter (8) exists
When the elementary error and variation of the pressure value of pressure checking point are no more than the allowable error that accuracy of instrument requires, do not need to by school
Table (8) is adjusted, and otherwise just needs to be adjusted calibrated meter (8)；
(e), it repeats step (c) and (d), by pressure checking point selected in calibrated meter (8) pressure range, by the side of increasing or reducing
It is completed to point-by-point verification；
(f), in a pressure range for adjusting above-mentioned calibrated meter (8), if the calibrated meter (8) a certain pressure checking point because
It is overproof to carry out adjustment, step (c) and step (d) are repeated, until in said one pressure range, the calibrated meter (8)
Under unadjusted state, reaches the elementary error of the pressure value of its pressure checking point and be deteriorated no more than accuracy of instrument requirement
Allowable error until, the verification of the calibrated meter (8) terminates.
2. the accurate method of verification low pressure gauge pressure as described in claim 1, it is characterised in that: the accuracy of instrument requirement
It is 0.05%F.S.
3. the accurate method of verification low pressure gauge pressure as claimed in claim 2, it is characterised in that: the selection in step (c)
Five pressure checking points, they are respectively 0,0.25* range pressure value, 0.5* range pressure value, 0.75* range pressure value and amount
Stroke pressure value.
4. the accurate method of verification low pressure gauge pressure as claimed in claim 3, it is characterised in that: the standard scale (1), quilt
Calibration (8), threeway (2), pressure micro actuator (3), shut-off valve (4), valuator (5), filter pressure relief valve (6) and pressure source (7)
Between by connecting tube (9) be connected.
5. the accurate method of verification low pressure gauge pressure as claimed in claim 4, it is characterised in that: the connecting tube (9) is
The nylon tube of diameter 4mm.
6. the accurate method of verification low pressure gauge pressure as claimed in claim 5, it is characterised in that: the rated pressure is
800KPa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235451.6A CN109900426A (en) | 2019-03-27 | 2019-03-27 | Verify the accurate method of low pressure gauge pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235451.6A CN109900426A (en) | 2019-03-27 | 2019-03-27 | Verify the accurate method of low pressure gauge pressure |
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| Publication Number | Publication Date |
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| CN109900426A true CN109900426A (en) | 2019-06-18 |
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| CN201910235451.6A Withdrawn CN109900426A (en) | 2019-03-27 | 2019-03-27 | Verify the accurate method of low pressure gauge pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112903186A (en) * | 2021-02-24 | 2021-06-04 | 北京康斯特仪表科技股份有限公司 | Pressure calibration method and pressure calibration device |
| CN113324692A (en) * | 2021-07-05 | 2021-08-31 | 北京康斯特仪表科技股份有限公司 | Pressure gauge, quick calibration method thereof and pressure calibration device |
| CN113484002A (en) * | 2021-07-02 | 2021-10-08 | 天津大唐国际盘山发电有限责任公司 | Boiler furnace pressure switch calibration device and method suitable for production site |
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| CN112903186A (en) * | 2021-02-24 | 2021-06-04 | 北京康斯特仪表科技股份有限公司 | Pressure calibration method and pressure calibration device |
| CN113484002A (en) * | 2021-07-02 | 2021-10-08 | 天津大唐国际盘山发电有限责任公司 | Boiler furnace pressure switch calibration device and method suitable for production site |
| CN113324692A (en) * | 2021-07-05 | 2021-08-31 | 北京康斯特仪表科技股份有限公司 | Pressure gauge, quick calibration method thereof and pressure calibration device |
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Application publication date: 20190618 |