CN104406740A - Low static pressure and differential pressure producer - Google Patents
Low static pressure and differential pressure producer Download PDFInfo
- Publication number
- CN104406740A CN104406740A CN201410726739.0A CN201410726739A CN104406740A CN 104406740 A CN104406740 A CN 104406740A CN 201410726739 A CN201410726739 A CN 201410726739A CN 104406740 A CN104406740 A CN 104406740A
- Authority
- CN
- China
- Prior art keywords
- differential pressure
- pressure
- pipeline
- static pressure
- low static
- 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.)
- Pending
Links
Abstract
The invention discloses a low static pressure and differential pressure producer and belongs to the field of automatic instrument calibration instruments. The low static pressure and differential pressure producer is characterized by comprising a single-chip microcomputer unit, a detection unit, a driving unit and an air circuit unit, wherein the single-chip microcomputer unit comprises a single-chip microcomputer, a first digital display, a second digital display, an alarm and a keyboard; the detection unit comprises an A/D(Analog to Digital)converter, a pressure transmitter and a differential pressure transmitter; the driving unit comprises a D/A (Digital to Analog)converter and an air compressor; the air circuit unit comprises an air storage tank, a first electromagnetic valve, an air filter, an electric regulating valve, a third electromagnetic valve, a second electromagnetic valve and an output interface. The low static pressure and differential pressure producer adopts the closed-loop control technology for a static pressure and a differential pressure, ensures accuracy of static pressure and differential pressure signals and realizes automatic calculation and output of a differential pressure point, automatic positive and reverse stroke output and automatic overpressure alarm and protection. The upper limit of the static pressure produced by the low static pressure and differential pressure producer is 1MPa.
Description
Technical field
The present invention relates to a kind of low static pressure differential pressure producer, belong to instrument and meter for automation tester field.
Background technology
Differential pressure signal is widely used in the inspection of equipment, sensor and instrument and qualification, because these equipment are when verifying, not only need differential pressure signal, also want static pressure signal, and differential pressure signal is general all less, only have at most tens kPas, the tester of high static pressure in mostly adopting now, manual adjustments static pressure and differential pressure signal, not only operation location is very difficult, easy toning, and differential pressure signal precision is lower, the pressure medium of the generator of high static pressure is transformer oil, very easily produces oil leakage phenomenon and artificial reading error.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of pressure medium to be pressurized air, have the low static pressure differential pressure producer of one that automatic regulating static and differential pressure, automatically location and check point, the static pressure upper limit are 1MPa.
For achieving the above object, the present invention is realized by following technical scheme: low static pressure differential pressure producer, it is characterized in that, comprise single machine unit, detecting unit, driver element and gas circuit unit, described single machine unit, comprise single-chip microcomputer, and the first numerical monitor to be electrically connected respectively with described single-chip microcomputer, second numerical monitor, alarm and keyboard, described detecting unit comprises the A/D converter be electrically connected with described single-chip microcomputer, and the pressure unit be electrically connected with described A/D converter respectively and differential pressure transmitter, described driver element comprises the D/A converter and air compressor machine that are electrically connected with described single-chip microcomputer respectively, described gas circuit unit comprises the gas-holder be connected with described air compressor machine pipeline, be arranged on first solenoid valve on described gas-holder top, the air strainer be connected with described gas-holder pipeline, the electric control valve be connected with described air strainer pipeline, the 3rd solenoid valve be connected with described air strainer pipeline, the second solenoid valve be connected with described electric control valve pipeline, the low pressure output interface be connected with the second described electromagnetic valve pipeline, the High voltage output interface be connected with the 3rd described electromagnetic valve pipeline, described pressure unit and the plemum of differential pressure transmitter respectively pipeline are connected on the pipeline between air strainer and the 3rd solenoid valve, negative pressure chamber's pipeline of described differential pressure transmitter is connected on the pipeline between electric control valve and the second solenoid valve, described electric control valve is electrically connected with D/A converter.
Further, the first described numerical monitor is shuangping san, and upper screen display shows the static pressure force value in pipeline, and lower screen display shows differential pressure value.
Further, the second described numerical monitor is single screen display, for showing the aperture of electric control valve.
Further, described electric control valve is the ZRSX series variable valve that Shanghai Sheng Chang internally piloted valve company produces.
The invention has the beneficial effects as follows; owing to have employed Closed loop Control to static pressure and differential pressure; ensure that the precision of static pressure and differential pressure signal, and achieve calculating output difference pressure point, automatically positive revesal output and over voltage alarm and protection automatically automatically, static pressure upper pressure limit of the present invention is 1MPa.
Accompanying drawing explanation
Fig. 1 is structural system figure of the present invention.
Implication is marked as follows in accompanying drawing:
1, single machine unit 2, detecting unit 3, driver element 4, gas circuit unit 5, single-chip microcomputer 6, first numerical monitor 7, second numerical monitor 8, alarm 9, keyboard 10, pressure unit 11, differential pressure transmitter 12, A/D converter 13, D/A converter 14, air compressor machine 15, gas-holder 16, first solenoid valve 17, air strainer 18, electric control valve 19, second solenoid valve 20, 3rd solenoid valve 21, High voltage output interface 22, low pressure output interface.
Embodiment
Below in conjunction with diagram and specific embodiment, the present invention is described in further detail.
With reference to Fig. 1, the low static pressure differential pressure producer of the present invention, comprise single machine unit 1, detecting unit 2, driver element 3 and gas circuit unit 4, described single machine unit 1, comprise single-chip microcomputer 5, and the first numerical monitor 6 to be electrically connected respectively with described single-chip microcomputer 5, second numerical monitor 7, alarm 8 and keyboard 9, described detecting unit 2 comprises the A/D converter 12 be electrically connected with described single-chip microcomputer 5, and the pressure unit 10 be electrically connected with described A/D converter 12 respectively and differential pressure transmitter 11, described driver element 3 comprises the D/A converter 13 and air compressor machine 14 that are electrically connected with described single-chip microcomputer 5 respectively, described gas circuit unit 4 comprises the gas-holder 15 be connected with described air compressor machine 14 pipeline, be arranged on first solenoid valve 16 on described gas-holder 15 top, the air strainer 17 be connected with described gas-holder 15 pipeline, the electric control valve 18 be connected with described air strainer 17 pipeline, the 3rd solenoid valve 20 be connected with described air strainer 17 pipeline, the second solenoid valve 19 be connected with described electric control valve 18 pipeline, the low pressure output interface 22 be connected with the second described solenoid valve 19 pipeline, the High voltage output interface 21 be connected with the 3rd described solenoid valve 20 pipeline, described pressure unit 10 and the plemum of differential pressure transmitter 11 respectively pipeline are connected on the pipeline between air strainer 17 and the 3rd solenoid valve 20, negative pressure chamber's pipeline of described differential pressure transmitter 11 is connected on the pipeline between electric control valve 18 and the second solenoid valve 19, described electric control valve 18 is electrically connected with D/A converter 13.
Further, the first described numerical monitor 6 is shuangping san, and upper screen display shows the static pressure force value in pipeline, and lower screen display shows differential pressure value.
Further, the second described numerical monitor 7 is single screen display, for showing the aperture of electric control valve 18.
Further, described electric control valve 18 is the ZRSX series variable valve that Shanghai Sheng Chang internally piloted valve company produces.
The course of work of the present invention:
First will the instrument of differential pressure signal or equipment be needed to be connected with low pressure output interface 22 by High voltage output interface 21, then static pressure pressure is set by the keyboard 9 of single machine unit 1, differential pressure value scope, export counting of differential pressure, positive revesal, alarming value, during work, the present invention is by pressure unit 10, A/D converter 12, single machine unit 1, air compressor machine 14 and the first solenoid valve 16 form pressure closed-loop control system, overpressure is controlled by the pulse switch of the first solenoid valve 16, in pipe, static pressure pressure is measured by pressure unit 10, force value is shown by the upper screen display of the first numerical monitor 6, form differential pressure closed-loop control system by differential pressure transmitter 11, A/D converter 12, single machine unit 1, D/A converter 13 and electric control valve 18, differential pressure regulates by controlling electric control valve 18 aperture.If pipeline inner pressure exceedes the safe pressure of setting, alarm 8 sends sound and light alarm signal, and starting interlock protection simultaneously, opens the first solenoid valve 16, starts decompression protection, to guarantee the person and device security.
The present invention, when pressure is arranged, can once arrange multiple differential pressure point, exports during work according to the differential pressure point of setting successively differential pressure, and can positive revesal work automatically, also can automatically be calculated by the present invention according to the differential pressure scope arranged and arrange differential pressure output point.
Claims (6)
1. a low static pressure differential pressure producer, is characterized in that: comprise single machine unit (1), detecting unit (2), driver element (3) and gas circuit unit (4).
2. low static pressure differential pressure producer according to claim 1, it is characterized in that: described single machine unit (1), the first numerical monitor (6), the second numerical monitor (7), alarm (8) and the keyboard (9) that comprise single-chip microcomputer (5) and be electrically connected respectively with described single-chip microcomputer (5).
3. low static pressure differential pressure producer according to claim 1, is characterized in that: described detecting unit (2) comprises the A/D converter (12) be electrically connected with described single-chip microcomputer (5) and the pressure unit (10) be electrically connected with described A/D converter (12) respectively and differential pressure transmitter (11).
4. low static pressure differential pressure producer according to claim 1, is characterized in that: described driver element (3) comprises the D/A converter (13) and air compressor machine (14) that are electrically connected with described single-chip microcomputer (5) respectively.
5. low static pressure differential pressure producer according to claim 1, it is characterized in that: described gas circuit unit (4) comprises the gas-holder (15) be connected with described air compressor machine (14) pipeline, be arranged on first solenoid valve (16) on described gas-holder (15) top, the air strainer (17) be connected with described gas-holder (15) pipeline, the electric control valve (18) be connected with described air strainer (17) pipeline, the 3rd solenoid valve (20) be connected with described air strainer (17) pipeline, the second solenoid valve (19) be connected with described electric control valve (18) pipeline, the low pressure output interface (22) be connected with described the second solenoid valve (19) pipeline, the High voltage output interface (21) be connected with the 3rd described solenoid valve (20) pipeline.
6. according to claim 1 or claim 3 or claim 4 or low static pressure differential pressure producer according to claim 5, it is characterized in that: described pressure unit (10) and the plemum of differential pressure transmitter (11) respectively pipeline are connected on the pipeline between air strainer (17) and the 3rd solenoid valve (20), negative pressure chamber's pipeline of described differential pressure transmitter (11) is connected on the pipeline between electric control valve (18) and the second solenoid valve (19), and described electric control valve (18) is electrically connected with D/A converter (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726739.0A CN104406740A (en) | 2014-12-04 | 2014-12-04 | Low static pressure and differential pressure producer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726739.0A CN104406740A (en) | 2014-12-04 | 2014-12-04 | Low static pressure and differential pressure producer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104406740A true CN104406740A (en) | 2015-03-11 |
Family
ID=52644387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410726739.0A Pending CN104406740A (en) | 2014-12-04 | 2014-12-04 | Low static pressure and differential pressure producer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104406740A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655364A (en) * | 2015-03-13 | 2015-05-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Pressure division mode high-static-pressure differential pressure generating device and method |
| CN105651458A (en) * | 2016-04-07 | 2016-06-08 | 中国科学院光电研究院 | Device and method for calibrating differential pressure sensor in low-pressure environment with high or low temperature |
| CN106092440A (en) * | 2016-08-09 | 2016-11-09 | 江苏方天电力技术有限公司 | A kind of detection device for differential pressure transmitter |
| CN107741297A (en) * | 2017-11-21 | 2018-02-27 | 王强 | Differential pressure transmitter verifies detecting system |
| CN109974932A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of instrument static pressure update the system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040123643A1 (en) * | 2001-09-08 | 2004-07-01 | Dresser, Inc., A Delaware Corporation | Pressure generator for portable instrument |
| CN102778332A (en) * | 2011-05-11 | 2012-11-14 | 中国科学院光电研究院 | Micro differential pressure generating and calibrating device |
| CN103234696A (en) * | 2013-04-26 | 2013-08-07 | 南京化工职业技术学院 | Differential pressure transmitter checking instrument |
| CN103234698A (en) * | 2013-04-24 | 2013-08-07 | 南京化工职业技术学院 | Low-static pressure differential transmitter calibration instrument |
| CN204269293U (en) * | 2014-12-04 | 2015-04-15 | 南京化工职业技术学院 | Low static pressure differential pressure producer |
-
2014
- 2014-12-04 CN CN201410726739.0A patent/CN104406740A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040123643A1 (en) * | 2001-09-08 | 2004-07-01 | Dresser, Inc., A Delaware Corporation | Pressure generator for portable instrument |
| CN102778332A (en) * | 2011-05-11 | 2012-11-14 | 中国科学院光电研究院 | Micro differential pressure generating and calibrating device |
| CN103234698A (en) * | 2013-04-24 | 2013-08-07 | 南京化工职业技术学院 | Low-static pressure differential transmitter calibration instrument |
| CN103234696A (en) * | 2013-04-26 | 2013-08-07 | 南京化工职业技术学院 | Differential pressure transmitter checking instrument |
| CN204269293U (en) * | 2014-12-04 | 2015-04-15 | 南京化工职业技术学院 | Low static pressure differential pressure producer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655364A (en) * | 2015-03-13 | 2015-05-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | Pressure division mode high-static-pressure differential pressure generating device and method |
| CN105651458A (en) * | 2016-04-07 | 2016-06-08 | 中国科学院光电研究院 | Device and method for calibrating differential pressure sensor in low-pressure environment with high or low temperature |
| CN105651458B (en) * | 2016-04-07 | 2019-03-19 | 中国科学院光电研究院 | The calibrating installation and method of differential pressure pickup in high/low temperature hypobaric |
| CN106092440A (en) * | 2016-08-09 | 2016-11-09 | 江苏方天电力技术有限公司 | A kind of detection device for differential pressure transmitter |
| CN106092440B (en) * | 2016-08-09 | 2019-03-05 | 江苏方天电力技术有限公司 | A kind of detection device for differential pressure transmitter |
| CN107741297A (en) * | 2017-11-21 | 2018-02-27 | 王强 | Differential pressure transmitter verifies detecting system |
| CN109974932A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of instrument static pressure update the system and method |
| CN109974932B (en) * | 2017-12-27 | 2024-03-19 | 核动力运行研究所 | Instrument static pressure correction system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104406740A (en) | Low static pressure and differential pressure producer | |
| CN201207013Y (en) | Detecting machine for airtightness of oil tank | |
| CN209166762U (en) | A kind of air-tightness detection device | |
| CN205192740U (en) | Safety valve detector | |
| CN105020128A (en) | Comprehensive performance test bed of fuel pumps | |
| CN104135706B (en) | Direct press type airtight detecting apparatus | |
| CN103398830B (en) | A kind of grease chamber's sealing leak hunting method of load ratio bridging switch | |
| CN203479474U (en) | Vacuum tester | |
| CN103207048A (en) | Calibration instrument for low-pressure pressure instrument | |
| CN102881120A (en) | Gas leakage alarm controller with intelligent alarm threshold value and control method thereof | |
| CN203551050U (en) | Pressure tolerance safety and pressure testing full-automatic detection device for gas flow instrument | |
| CN107677429A (en) | A kind of air-tightness detection device and its detection method | |
| CN103791985A (en) | Static state standard cubic meter calibration device and calibration method of static state standard cubic meter calibration device | |
| CN103234698A (en) | Low-static pressure differential transmitter calibration instrument | |
| CN203337345U (en) | Air tightness detection device | |
| CN207600696U (en) | Air tightness detection apparatus | |
| CN204924806U (en) | Device is suppressed to glass fiber high pressure pipeline still water | |
| CN105067202B (en) | Electromechanical valve air-tightness intelligent detection equipment and its detection method | |
| CN204269293U (en) | Low static pressure differential pressure producer | |
| CN209085838U (en) | The portable density device for checking electric relay of internal high-voltage storage cylinder | |
| CN205808618U (en) | A kind of nuclear power station differential pressure transmitter static pressure correcting device | |
| CN203241194U (en) | Calibrator of low-pressure pressure instrument | |
| CN109916568A (en) | Electric machine controller sealing propertytest system, device and method | |
| CN203037283U (en) | Filter integrity testing instrument | |
| CN203011494U (en) | Pneumatic liquid adding verification device for float type liquid level sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |