CN1776387A - Automatic calibrating instrument for safety valve - Google Patents
Automatic calibrating instrument for safety valve Download PDFInfo
- Publication number
- CN1776387A CN1776387A CN 200510101639 CN200510101639A CN1776387A CN 1776387 A CN1776387 A CN 1776387A CN 200510101639 CN200510101639 CN 200510101639 CN 200510101639 A CN200510101639 A CN 200510101639A CN 1776387 A CN1776387 A CN 1776387A
- Authority
- CN
- China
- Prior art keywords
- pressure
- displacement
- safety valve
- acquisition
- data
- 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
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The automatic check meter installs pressure sensor on sampling points of pressure instrument of current check meter for safety valve, and installs displacement transducer on place, where safety valves are located. Through collectors, computer collects pressure and displacement of safety valve automatically, carrying out automatic data analysis, information display in real time, data recording for safety valves, printing report forms of check, and playing back checking procedure. Features are: compact structure, high precision, easy of operation and low manufacturing cost. The invention is applicable to upgrading current pressure instrument type check meter with less cost.
Description
Technical field
The present invention relates to the safety valve verifying attachment, particularly the safety valve automatic check device.
Background technology
Boiler and pressure vessel is widely used in fields such as oil, chemical industry, iron and steel and daily life, and safety valve is the important safety parts on the boiler and pressure vessel equipment, is used for preventing equipment generation superpressure destruction.Safety valve is in operational process, and its performance particularly its set-pressure and sealing property can change, and causes safety valve opened by pressure or serious leakage takes place in accordance with regulations, directly threatens personal safety and equipment self safety.Therefore, periodic inspection is one of big event of searching of device security to safety valve.Safety valve method of inspection defiber check (cold conditions check) and two kinds of X-ray inspection Xs (hot check).Off-line check is that safety valve is unloaded from service line, debugs level pressure on special safety valve testing platform.At X-ray inspection X is to unload safety valve, and allow safety valve still be operated in the normal medium operating mode, the special online testing instruments anchor clamps of one cover are placed on the valve, adopt hydraulic system that the safety valve spool is applied an additional force that makes progress and force spool to be opened, calculate the opening pressure of safety valve according to the record of instrument with side.Existing safety valve testing platform is made of control device, supercharging device, verification platform and sampling inspection side display device, and its weak point is that complex structure, price are more expensive, and testing accuracy is low, and the transformation and upgrade expense is big.Manometer formula safety valve testing platform is widely used in the off-line safety valve testing, its major defect is to use simulation to show to indicate the size of opening pressure, its degree of accuracy is subjected to the influence of factors such as operator's sense of responsibility, technical merit and the collimation error, even the situation of misalignment occurs.A kind of safety valve automatic check device is arranged, and it has realized automatic clamping, pressurization, verification and the pressure release of safety valve in the safety valve testing process, and the computer management function is provided, and improves to some extent on mode of operation.But the general structure of this device and manometer formula safety valve testing platform difference are big, and complex structure.This device has increased the more expensive hydraulic workstation of price in order to provide clamping pressure to safety valve.A qualified manometer formula safety valve testing platform operator just can put the safety valve clamping in place in planting somewhat in fact.Simultaneously, in the pressure process of safety valve, be that certain requirement is arranged to the rate of pressurization of pressure.This device has only used air on-off valve and hand valve to be used as boost control, and main rate of pressurization control comes from the control of hand valve to flow.So this automatic pressurization and manual pressure do not have the difference of essence, have lost the dirigibility of manual pressure on the contrary.This device optional equipment is many, and function is incomplete, the equipment cost height, thereby be unsuitable for large-scale promotion.
Summary of the invention
The automatic calibrating instrument for safety valve that the purpose of this invention is to provide a kind of compact conformation that is used for manometer formula safety valve testing platform, precision height, easy to operate, low cost of manufacture, the existing manometer formula safety valve testing platform of upgrading is to reach the effect that will have the transformation and upgrade of manometer formula safety valve testing platform with less expense now.
Technical solution of the present invention is that the computing machine in the automatic calibrating instrument for safety valve has pressure acquisition, controlling application program, and computing machine is carried out the control to pressure acquisition, displacement acquisition and Eigenvalue Analysis as follows according to the pressure acquisition module in this application program, displacement acquisition module, Eigenvalue Analysis module:
(1), gathers the pressure and the displacement of current safety valve.
(2), judge whether safety valve pressure and displacement reach 80% of setting valve, if the result then returns step (1) for not.
(3), if the pressure displacement reaches setting valve 80%, then enter per second 1000 times to the high speed acquisition of pressure and displacement and preserve data.
(4), judge whether to reach 30000 samplings, if the result then returns step (3) for not.
(5), if the sampling reach 30000 times, then finish this sampling.
(6), according to the pressure and the displacement data that collect, ask for forward and backward point pressure difference and judge whether that supercharging is too fast, if the result is for being then to abandon this data.
(7), if front and back point pressure difference increase is not too fast, then carry out 128 mean values and handle.
(8), carry out front and back point pressure differences and handle and obtain the pressure increment data, carry out the displacement rising edge and search, record displacement lifting position.
(9), carry out pressure negative increment inquiry and obtain the pressure characteristic point, carry out the displacement negative edge and search, record displacement down position.
(10), instead look into point pressure value before the pressure characteristic point, obtain opening pressure, according to displacement rising, negative edge position, search the unlatching that displacement curve obtains displacement and return height.
(11), with opening pressure, open the seat and move and highly write database.
Also there are several programs and database file in the computing machine of the present invention, described program comprises digital data acquisition module, real-time display module, safety valve data typing module, design data typing module, database management module, system's Reports module, detecting information enquiry module, and they are integrated in collection, the controlling application program; Wherein the digital data acquisition modular program is carried out the digital data acquisition control of power supply by collector to electric switch, and described other modules are carried out the control of data presentation, typing, printing, inquiry, modification by terminal.
The pressure of safety valve of the present invention and displacement acquisition principle are when operating personnel start the automatic measuring ability of safety valve, and system begins by pressure transducer and displacement transducer pressure and displacement to be carried out data acquisition.When safety valve pressure reach safety valve requirement setting valve 80% the time, system enters the high speed acquisition state of per second 1000 times, and continuous acquisition and 30 seconds data of preservation, finishes the acquisition function of this safety valve in detecting automatically at last.Be the normal working hours of relief valve operation platform: carrying out the working time finishing testing at 8-12 in second greatly when opening pressure detects; Working time is finished testing at 20-28 in second greatly when carrying out the blow pressure detection, so the sampling time is fixed on 30 seconds.Then pressure and the displacement data of gathering carried out analyzing and processing, and ask for opening pressure, blow pressure and the Lift of safety valve by the method for searching eigenwert.When the safety valve sealing surface was opened, at this moment the once state of negative supercharging can appear in the state of former native system supercharging.According to this rule, as long as in data chainning, find this unique point, the maximum sealing load in the time of just can obtaining the safety valve sealing at its preceding point, the just opening pressure of safety valve.Consider in the safety valve detecting operation rules pressure boost control requirement in the operation,, carried out abandoning handling the data that reflect in the image data that supercharging is too fast.Consider the not clear interference that may exist in the system, therefore at first image data has been carried out 128 mean values and handled, to reduce the influence of disturbing system.When safety valve was opened, the guide rod of safety valve is the displacement of jumping characteristic once, and safety valve can be held open state after opening, and when system pressure was lower than its blow pressure, safety valve blowback was closed, and displacement curve presents a square wave figure.By to the searching of square wave rising edge, can obtain the Lift of safety valve easily; By to the searching of square wave negative edge, can obtain the blow pressure of safety valve easily.The transformed error of pressure of the present invention, displacement transducer is 0.25%, and the transformed error of collector is 0.01%, and the system data Acquisition Error is 0.26%, is higher than 0.5 class precision requirement.
Advantage of the present invention is that automatic calibrating instrument for safety valve is realized the checking procedure automatic data acquisition, automated data analysis, possesses data management function simultaneously, its compact conformation, precision height, easy to operate, low cost of manufacture reaches with the effect of less expense with existing manometer formula safety check plant modification upgrading.
Description of drawings
Fig. 1 is a structure block scheme of the present invention;
Fig. 2 is a pressure acquisition control program process flow diagram of the present invention;
Fig. 3 is a pressure characteristic value analysis and Control program flow diagram of the present invention;
Fig. 4 is a displacement acquisition control program process flow diagram of the present invention;
Fig. 5 is that displacement characteristic value of the present invention is divided folding control program process flow diagram.
Embodiment
According to shown in Figure 1, the present invention is made up of hardware 1 and software 2 two parts.Wherein hardware 1 is made up of pressure transducer 3, displacement transducer 4, collector 5 and computing machine 6.Wherein pressure transducer 3 adopts SENEX DG1300-BZ type pressure transducers, can select 1,5,10,15,20,25,30 as required, the pressure transducer of eight kinds of specifications such as 40MPa.Displacement transducer 4 adopts the river ZL4200 of unit type displacement transducer.Collector 5 adopts ADLINK PCI-9111 type multi-function data acquisition card.Computing machine 6 adopts ADLINK type industrial computer.The biography that pressure sensor 3 is installed in the manometer sampled point of the existing manometer formula safety valve testing platform that needs transformation connects on the device (promptly leave the air-path interface of a 1/4NPT on the check cylinder, at air-path interface a joint is installed).Displacement transducer 4 is installed on the displacement transducer fixed support of safety valve bearing of above-mentioned manometer formula safety valve testing platform.The output terminal of pressure transducer 3 and displacement transducer 4 is gathered input end by Shielded Twisted Pair with two simulate amounts of analog quantity and digital data acquisition device 5 respectively and is connected.The digital data acquisition input end of collector 5 can be connected with the output terminal of relay on the above-mentioned manometer formula safety valve testing platform, solenoid valve, button, so that carry out the collection of digital quantity signal, is used to control line related.The output terminal of collector 5 is connected with the digital signal input end of computing machine.Pressure transducer 3 and displacement transducer 4 will flow to the input end of collector 5 by pressure of receiving and change in displacement signal through its output terminal, collector 5 is a digital signal with pressure and the shift simulation conversion of signals that receives, and flows to computing machine 6 by its output terminal and handles.Software 2 of the present invention is made up of the collection, controlling application program 7, device driver 9, the database 8 that deposit in the computing machine 6.Wherein collection, control program 7 are made up of pressure acquisition module, displacement acquisition module, digital data acquisition module, characteristics analysis module, real-time display module, safety valve data typing module, equipment data typing module, database management module, system's Reports module, side examination information inquiry module.Pressure acquisition module, displacement acquisition module and digital data acquisition modular program realize collection to pressure, displacement and electric switch signal by control collector 5.
According to shown in Figure 2, the current pressure that the setting up procedure 91 of pressure acquisition module transports for the collector 5 that receives; Then judge in step 92 whether this pressure reaches 80% of safety valve pressure setting valve, if do not reach, then turn back to step 91, otherwise enter step 93, carry out the high speed pressure collection of per second 1000 times and preserve pressure data.In step 94, judge whether to reach 30000 samplings then,, then turn back to step 93, finish this pressure acquisition otherwise enter step 95 if do not reach.
According to shown in Figure 4, when carrying out pressure acquisition, also carry out displacement acquisition.The sample shift signal of the current safety valve that the setting up procedure 101 of displacement acquisition module transports for the collector 5 that receives.Judge in step 102 whether pressure reaches safety valve stationary value 80%, if do not reach, then turn back to step 101, enter the high-speed displacement collection of per second 1000 times and preserve displacement data otherwise enter step 103.In step 104, judge whether to reach 30000 samplings then, then do not turn back to step 103, finish this displacement acquisition otherwise enter step 105 if reach.
According to Fig. 3, shown in Figure 5, after finishing pressure and displacement acquisition, enter Eigenvalue Analysis module executive routine.Respectively pressure and displacement acquisition data are carried out the Eigenvalue Analysis processing, with opening pressure, blow pressure and the unlatching displacement of asking for safety valve.The setting up procedure 111 of pressure characteristic value routine analyzer is the pressure acquisition data.In step 112, ask for forward and backward point pressure difference and judge whether that supercharging is too fast,, then enter step 113 and abandon this pressure data if supercharging is too fast.Carry out 128 mean values processing otherwise enter step 114, to obtain pressure characteristic value data query.Then in step 115, carry out forward and backward some difference and handle, obtain the pressure increment data.The pressure increment inquiry is carried out in continuation in step 116, obtain the pressure characteristic point.The anti-inquiry pressure characteristic point that pushes away in step 117, preceding point pressure value obtains opening pressure of safety valve.In step 118, opening pressure write in the database 8 at last and preserve.The setting up procedure 121 of displacement characteristic value routine analyzer is the displacement acquisition data.In step 122, before and after asking for, point pressure difference and judge whether to increase too fast,, then enter step 123 and abandon this displacement data if increase too fastly.Carry out 128 mean values processing otherwise enter step 124, obtain displacement characteristic value data query.Continuation is carried out rising edge and is searched in step 125, in record displacement lifting position.In step 126, carry out negative edge and search, record displacement down position.Then in step 127 according to rising edge, negative edge position, search displacement curve, obtain Lift, blow pressure.In step 128 Lift, blow pressure being write database 8 at last preserves.
The present invention utilizes real-time display module to come the control computer terminal to show the numerical value and the curve of safety valve pressure, displacement in real time, reflects the real-time attitude of system simultaneously, system's operation situation.
Utilize safety valve data typing module to come the related data of typing safety valve, comprise testDate, mechanism for testing, testing location, name of product, model and factory number, safety valve latus rectum and nominal pressure, manufacturer's title, test purpose, test operator, client and representative thereof.
Utilize design data typing module to come the relevant design data of typing safety valve, comprise circulation diameter, seal style and diameter, set-pressure, Lift, back pressure, actuating medium and working temperature thereof.
Utilize database management module to realize data are increased, delete, revise.
Utilize Reports module to realize the automatic generation and the printing of verification report.
Utilize the detecting information enquiry module to realize the inquiry of archive information.
Database structure table of the present invention is as follows
| Numbering | Chinese | Field name |
| 1 | Report number | Bh |
| 2 | Applying unit | Sydw |
| 3 | Unit address | Dwdz |
| 4 | The contact person | Lxr |
| 5 | Telephone number | Lxdh |
| 6 | Numbering | Zzbh |
| 7 | Device name | Zzmc |
| 8 | The safety valve type | Aqflx |
| 9 | The safety valve model | Aqfxh |
| 10 | Actuating medium | Gzjz |
| 11 | Require set-pressure | Yqzdyl |
| 12 | Operative norm | Zxbz |
| 13 | Verification mode | Xyfs |
| 14 | The verification medium | Xyjz |
| 15 | Set-pressure | Zdyl |
| 16 | Seal test pressure | mfsyyl |
| 17 | Explanation | Sm |
| 18 | Check Date | Xyrq |
| 19 | Verification | Xy |
| 20 | Examine | Sp |
| 21 | Inside nominal diameter | Gctj |
| 22 | Seat diameter | Fzkj |
| 23 | The manufacturer | Zzdw |
| 24 | The manufacturing license numbering | zzxkzbh |
| 25 | The pressure level range | Yljbfw |
| 26 | Factory number | Ccbh |
| 27 | The date of production | Ccrq |
| 28 | The verification medium temperature | Xyjzwd |
| 29 | Visual examination | Wgjc |
| 30 | Dissembling inspection | Cxjc |
| 31 | Actual set-pressure 1 | sjzdyl1 |
| 32 | Actual set-pressure 2 | sjzdyl2 |
| 33 | Actual set-pressure 3 | sjzdyl3 |
| 34 | Blow pressure 1 | Hzyl1 |
| 35 | Blow pressure 2 | Hzyl2 |
| 36 | Blow pressure 3 | Hzyl3 |
| 37 | Sealing load | Mfyl |
| 38 | The tensimeter numbering | Ylbbh |
| 39 | Lift 1 | Kqgd1 |
| 40 | Lift 2 | Kqgd2 |
| 41 | Lift 3 | Kqgd3 |
| 42 | Blowdown presssure 1 | Pfyl1 |
| 43 | Blowdown presssure 2 | Pfyl2 |
| 44 | Blowdown presssure 3 | Pfyl3 |
| 45 | The verification conclusion | Xyjl |
| 46 | Remarks | Bz |
| 47 | Raw data | Yssj |
By the description of above-mentioned 47 fields, all information of the record security valve that database 8 is detailed.The information that comprises reflection safety valve manufacturer in these information; The information that the applying unit of reflection safety valve is arranged; The information that reflection safety valve characteristic is arranged; The information that reflection check unit is arranged; When check reflection information of check data is at that time arranged.
After being installed in the pressure transducer 3 of automatic calibrating instrument for safety valve and displacement transducer 4 on the existing manometer formula safety valve testing platform, can carry out the safety valve testing operation:
Safety valve that will verification is installed on the above-mentioned checking table and clamps, and starts automatic calibrating instrument for safety valve, detects at＜safety valve〉select＜new the detection in the menu menu;
System enters＜typing of safety valve data〉interface, the operator is according to the related data of the form input safety valve of system requirements;
Behind correct fill data, click＜detecting instrument 〉, system enters the tester modeling interface;
According to the range of the pressure transducer of selecting for use, select the range of instrument;
Press＜begin detection〉button;
Close the blowdown valve and the pressure charging valve of checking table;
Open the test source of the gas;
Manual adjustments is opened pressure charging valve, controls pumping rate well, allows pressure be increased to safety valve and begins to reveal;
Close pressure charging valve, open pressure-release valve, pressure relief system, the opening pressure of finishing the once safety valve detects;
Carry out three opening pressures according to the method described above and detect, promptly finish the verification of safety valve.
Claims (2)
1, automatic calibrating instrument for safety valve, comprise and be used to receive the pressure transducer that pressure changes, be used to receive the displacement transducer of change in displacement, be used to gather the collector of pressure variation and change in displacement, be used for pressure acquisition and displacement acquisition are controlled computing machine with data processing, the output terminal of pressure transducer and displacement transducer is connected with the input end of collector, the output terminal of collector is connected with input end and computer, it is characterized in that described computing machine has collection, controlling application program, computing machine is according to the pressure acquisition module in this application program, the displacement acquisition module, the Eigenvalue Analysis module is carried out as follows to pressure acquisition, the control of displacement acquisition and Eigenvalue Analysis:
(1), gathers the pressure and the displacement of current safety valve;
(2), judge whether the pressure of safety valve reaches 80% of setting valve, if the result then returns step (1) for not;
(3), if pressure reaches 80% of setting valve, then enter per second 1000 times to the high speed acquisition of pressure and displacement and preserve pressure and the displacement acquisition data;
(4), judge whether to reach 30000 samplings, if the result then returns step (3) for not;
(5), if the sampling reach 30000 times, then finish this sampling;
(6), according to the pressure acquisition data that collect, before and after asking for, the point pressure difference and judge whether to increase too fast, if the result is for being then to abandon this data;
(7), if the increase of forward and backward point pressure difference is not too fast, then carry out 128 mean values and handle;
(8), carry out forward and backward point pressure difference and handle and obtain the pressure increment data, carry out the displacement rising edge and search, record displacement rising edge position;
(9), carry out pressure negative increment inquiry, obtain the pressure characteristic point, carry out the displacement negative edge and search, record displacement down position;
(10), counter push away to look for look into pressure characteristic point, preceding point pressure value, obtain opening pressure, according to displacement rising edge, negative edge position, search Lift, blow pressure that displacement curve obtains displacement;
(11), opening pressure, blow pressure, Lift are write database.
2, automatic calibrating instrument for safety valve according to claim 1, it is characterized in that also having several programs and database file in the computing machine, described program number comprises digital data acquisition module, real-time display module, safety valve data typing module, design data typing module, database management module, system's Reports module, detecting information enquiry module, and they are integrated in collection, the controlling application program; Wherein the digital data acquisition modular program is carried out the digital data acquisition control of power supply by collector to electric switch, and described other modules are carried out the control of data presentation, typing, printing, inquiry, modification by terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101639 CN1776387A (en) | 2005-11-29 | 2005-11-29 | Automatic calibrating instrument for safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101639 CN1776387A (en) | 2005-11-29 | 2005-11-29 | Automatic calibrating instrument for safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1776387A true CN1776387A (en) | 2006-05-24 |
Family
ID=36766022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510101639 Pending CN1776387A (en) | 2005-11-29 | 2005-11-29 | Automatic calibrating instrument for safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1776387A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266632A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Self-checking method and system for safety valve and anesthesia machine |
| CN102866008A (en) * | 2012-09-26 | 2013-01-09 | 南京市锅炉压力容器检验研究所 | Low-redundancy high-reliability intelligent checking device for safety valves and checking method utilizing checking device |
| CN103499439A (en) * | 2013-10-11 | 2014-01-08 | 深圳市特种设备安全检验研究院 | Safety valve online detector |
| CN103900803A (en) * | 2012-12-26 | 2014-07-02 | 北京谊安医疗系统股份有限公司 | Machine-controlled safety valve detection method and device |
| CN105403371A (en) * | 2015-10-08 | 2016-03-16 | 张荣斌 | Under-pressure detection method of ball valve |
| CN106092561A (en) * | 2016-08-29 | 2016-11-09 | 湖北三江航天红峰控制有限公司 | A kind of multifunctional safety valve calibration equipment |
| CN108534869A (en) * | 2018-02-24 | 2018-09-14 | 三川智慧科技股份有限公司 | A kind of method that calibration machine automatic comparison corrects platform difference |
-
2005
- 2005-11-29 CN CN 200510101639 patent/CN1776387A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266632A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Self-checking method and system for safety valve and anesthesia machine |
| CN102866008A (en) * | 2012-09-26 | 2013-01-09 | 南京市锅炉压力容器检验研究所 | Low-redundancy high-reliability intelligent checking device for safety valves and checking method utilizing checking device |
| CN103900803A (en) * | 2012-12-26 | 2014-07-02 | 北京谊安医疗系统股份有限公司 | Machine-controlled safety valve detection method and device |
| CN103499439A (en) * | 2013-10-11 | 2014-01-08 | 深圳市特种设备安全检验研究院 | Safety valve online detector |
| CN105403371A (en) * | 2015-10-08 | 2016-03-16 | 张荣斌 | Under-pressure detection method of ball valve |
| CN105403371B (en) * | 2015-10-08 | 2017-12-19 | 上海孚祥生态环保科技股份有限公司 | A kind of band pressure detection method of ball valve |
| CN106092561A (en) * | 2016-08-29 | 2016-11-09 | 湖北三江航天红峰控制有限公司 | A kind of multifunctional safety valve calibration equipment |
| CN106092561B (en) * | 2016-08-29 | 2019-11-22 | 湖北三江航天红峰控制有限公司 | A kind of multifunctional safety valve calibration equipment |
| CN108534869A (en) * | 2018-02-24 | 2018-09-14 | 三川智慧科技股份有限公司 | A kind of method that calibration machine automatic comparison corrects platform difference |
| CN108534869B (en) * | 2018-02-24 | 2019-12-13 | 三川智慧科技股份有限公司 | method for automatically comparing and correcting station differences of meter correcting machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1776387A (en) | Automatic calibrating instrument for safety valve | |
| CN2783316Y (en) | Mechanics performance tester for coating layer | |
| CN208736608U (en) | A kind of intelligence multichannel verification system | |
| CN106442888B (en) | Automobile environment-protection exhaust pollution analyte detection chassis dynamometer integrated correction system | |
| CN108956008A (en) | A kind of intelligence multichannel verification system and calibration method | |
| CN108225756A (en) | Control valve performance evaluation system based on L abview | |
| CN103837299B (en) | A kind of torque spanner automatic checkout system and detection method | |
| CN101178062A (en) | Variable hydraulic pump pressure flow characteristics auto-testing method | |
| CN105823596A (en) | Piston pressure gauge verification and calibration device and method | |
| CN108362436A (en) | A kind of Pressure and Difference Pressure Transmitter Response Time Test System and method | |
| CN201803838U (en) | Multifunctional valve testing system | |
| CN100516815C (en) | Automatic testing method and apparatus for performance of breathing relief valve | |
| CN110514355A (en) | A kind of aviation aircraft lubricating oil chamber pressure calibrating device for sensors and its calibration method | |
| CN201539468U (en) | Hydraulic motor test stand automatic measure and control device | |
| CN113158558B (en) | High-speed railway roadbed continuous compaction analysis method, device and analyzer | |
| CN113804861A (en) | Transformer on-line monitoring and early warning system and method | |
| CN100559353C (en) | Method for detecting rapidly computer hardware equipment function completeness | |
| CN113432863A (en) | Valve health state detection and diagnosis device and method | |
| CN113029571A (en) | System and method for testing pollutant emission of hydraulic excavator | |
| CN106768937B (en) | A kind of gear pump informationization intelligent test system and test method | |
| EP0436312A2 (en) | Diagnostic expert system monitor | |
| CN201732149U (en) | Calibration console of quick-acting oil pressure relay | |
| CN1066501A (en) | Microcomputor detecting device for linear displacement character of governor valve | |
| CN201025464Y (en) | Automatic testing device for respiratory secure valve performance | |
| CN2800255Y (en) | Dynamic detector for pneumatic and electric torsional moment spanner |
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 |