CN201004041Y - SF6 air density relay calibrator for automatic rated value test - Google Patents
SF6 air density relay calibrator for automatic rated value test Download PDFInfo
- Publication number
- CN201004041Y CN201004041Y CNU2007200661531U CN200720066153U CN201004041Y CN 201004041 Y CN201004041 Y CN 201004041Y CN U2007200661531 U CNU2007200661531 U CN U2007200661531U CN 200720066153 U CN200720066153 U CN 200720066153U CN 201004041 Y CN201004041 Y CN 201004041Y
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- gas
- pressure
- density relay
- ratings
- gas density
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Abstract
The utility model relates to a SF6 gas density replay potency meter which automatically tests the rated value, the mentioned potency mete comprises an air source supplying device with adjustable air pressure, at least one pressure sensor, a temperature sensor, an operating keyboard, a computer data processing system and a display screen; the computer data processing system is provided with an input port of the replay action signals. The utility model is characterized in that the utility model is able to automatically test the rated value of the checked SF6 gas density replay, automatically modify the rated value, and store the testing result.
Description
Technical field
The utility model relates to SF
6Gas density relay checking instrument relates in particular to a kind of can the test automatically and the SF of recording density relay ratings
6Gas density relay checking instrument.
Background technology
SF
6Electric product has been widely used in power department, industrial and mining enterprises, has promoted the fast development of power industry.How to guarantee SF
6The reliable and secure operation of electric product has become one of vital task of power department.SF
6Gas density relay is SF
6One of key element of electric switch, it is used for detecting SF
6SF in the electrical equipment body
6The variation of gas density, its performance quality directly has influence on SF
6The reliable and secure operation of electrical equipment.Be installed on on-the-spot SF
6Gas density relay is because of often action, and the phenomenon of dumb or poor contact of contacts often appears moving in after date during through one section, and what have also the temperature compensation degradation can occur, causes SF when variation of ambient temperature easily
6The gas density relay misoperation.
Therefore original power portion has formulated DL/T596-1996 " power equipment preventive trial rules ".This testing regulations regulation: each SF
6The electric switch applying unit should be regularly to SF
6Gas density relay carries out verification.From practical operation situation, to the SF at scene
6It is to prevent trouble before it happens that gas density relay carries out periodic check, ensures one of necessary means of power equipment safety reliability service.In airtight container, the SF under the uniform temperature
6Gaseous tension can be represented SF
6Gas density.In order to unify SF during traditionally often 20 ℃
6The pressure of gas is as the typical value of its corresponding density.So, SF
6Gas density relay SF during all with 20 ℃
6The pressure of gas is as scale value.At the scene during verification, under different environment temperatures, the normal pressure value the when force value that measures all will be converted to its corresponding 20 ℃, thus judge this SF
6The performance of gas density relay.Present SF
6The method of calibration of gas density relay is the reading comparison method that utilizes between chronograph watch and tested taking temperature.Can only utilize classic method to carry out verification to the verification of these instrument as can be known to be difficult to test accurately from above-mentioned, because reading is judged because of human factor, pointer takes place and refers to situation on non-scale mark in regular meeting, and this estimates by the people entirely and reads, and there is different results in different people regular meetings; The test instrumentation of some energy readings has appearred in existing market, has eliminated above-mentioned error, still, these instrument are as wanting deal with data, then also will record data with notes, by artificial or re-enter computer and just can handle, this is to bother very much and inconvenience.
Summary of the invention
The utility model is intended to solve the above-mentioned defective of prior art, provides a kind of and can test the also SF of recording density relay ratings automatically
6Gas density relay checking instrument.It is test reading automatically, and can store reading automatically, and can utilize the data that store to handle and show, thereby makes density monitor verification work fast convenient.
The utility model is achieved in that a kind of SF6 gas density relay checking instrument of automatic testing nominative, the source of the gas that comprises an adjustable in pressure provides mechanism, at least one pressure transducer, a temperature sensor, an operation keyboard, a computer data processing system and a display screen, computer data processing system is provided with the relay action signal input port, and described source of the gas provides mechanism to provide mechanism for the source of the gas of adjustable in pressure.
The SF6 gas density relay checking instrument of described automatic testing nominative, the source of the gas of described adjustable in pressure provides mechanism to comprise a pressure regulating cylinder that is used to provide source of the gas, piston is housed in the pressure regulating cylinder, piston is connected with an adjuster bar, handwheel is equipped with in the adjuster bar outer end, handwheel drives adjuster bar and then the drive piston moves in pressure regulating cylinder by rotating, and realizes the adjusting to bleed pressure in the pressure regulating cylinder.
The SF6 gas density relay checking instrument of described automatic testing nominative, tester comprise that also one can be carried out memory storing to the result who calculates error automatically.
The SF6 gas density relay checking instrument of described automatic testing nominative, described tester also comprise a data output interface, to export and to print this related data and result.
The SF6 gas density relay checking instrument of described automatic testing nominative, described ratings test command key are that the mode that button, selector switch, keyboard, touch-screen or man-machine conversation are linked up is carried out.
The SF6 gas density relay checking instrument of described automatic testing nominative, described operation keyboard and display screen join together, are touch-screen.
The utility model passes through the automatic verification to the ratings of product to be tested, tests out this test article, and promptly whether the SF6 gas density relay is qualified.This tester can be measured ratings automatically, manually reading and record, and these related datas are easy to storage, print, judge and handle simultaneously; And can further work out test report, and very convenient, be subjected to user of service's welcome deeply.
Description of drawings
Below, the utility model is described in further detail in conjunction with the accompanying drawings:
Fig. 1 is the structured flowchart of the utility model SF6 gas density relay checking instrument;
Fig. 2 is the structural representation that the source of the gas in the utility model tester provides mechanism.
Embodiment
Can test the also SF of recording density relay ratings below by embodiment automatically to of the present utility model
6Gas density relay checking instrument is further described.Referring to Fig. 1, tester of the present utility model comprises that the source of the gas of an adjustable in pressure provides mechanism 15, at least one pressure transducer 16, temperature sensor 17, computer data processing system 18,20 and display screens 19 of operation keyboard (being man-machine interface), and computer data processing system is provided with the relay action signal input port.
Referring to Fig. 2, Fig. 2 is the utility model SF
6Source of the gas in the gas density relay checking instrument provides the structural representation of mechanism 15.It mainly comprises piston 1, wireway 21,22,23, valve 3, casing 4, air reservoir 5, pressure transducer 6, four-way seat 7, reverse checkvalve 8, O RunddichtringO 91,92, adjuster bar 10, handwheel 11, installing plate 12, pressure regulating cylinder 13.Air reservoir 5 is connected with an end of wireway 22, communicates on gas circuit; The other end of wireway 22 is connected with an end of valve 3; The other end of valve 3 is connected with an end of wireway 21; The other end of wireway 21 is connected with an interface of four-way seat 7; Another interface of four-way seat 7 is connected with an end of wireway 23 again; Pressure transducer 6 is fixed on the 3rd interface of four-way seat 7; Reverse checkvalve 8 is fixed on the 4th interface of four-way seat 7.The other end of wireway 23 is connected with pressure regulating cylinder 13; Piston 1 is arranged in the pressure regulating cylinder, and O- ring seal 91,92 is set in the groove of piston 1, and major function is that piston 1 seals when pressure is regulated in pressure regulating cylinder 13 motions; Piston 1 is movably connected with adjuster bar 10 again and connects; Adjuster bar 10 is connected again on the end cap of pressure regulating cylinder 13, can free activity regulate pressure; Handwheel 11 is movably connected with adjuster bar 10 and connects, and handwheel 11 can be movable, during use and adjuster bar 10 combine, the time spent can be not for convenience detach.Installing plate 12 is fixed on air reservoir 5 and the pressure regulating cylinder 13, and valve 3 and four-way seat 7 are fixed on the installing plate 12; Above element is installed in again in the casing 4.By the air reservoir of favorable sealing property, pressure regulating cylinder, valve, piston (studding with O-ring seal), wireway, pressure transducer, reverse checkvalve, adjuster bar, handwheel etc. have just been set up totally enclosed SF6 gas-circulating system, can make things convenient for, trickle, slowly, repetition, light adjusting pressure makes and does not waste SF6 gas in the checking procedure.
When using at the scene, SF
6One end of gas connection tracheae is connected with the SF6 gas density relay verification mouth on the SF6 electrical equipment, the other end that SF6 gas connects tracheae provides the reverse checkvalve 8 in the mechanism 15 to be connected with source of the gas, after connecting, observe force value, if pressure is not enough, illustrate that gas is not enough, just open valve, the gas of air reservoir is released, till gas is enough tested.Valve-off then just can be regulated the pressure of the SF6 gas density relay of being tested by regulating piston 1, just can the verification density monitor.Its operation key step is as follows:
1. the aviation plug with test article (relay) 14 checkpoint contacts sampling lead docks with the density monitor contact socket on the tester, and verification point sampling lead other end redness (a pair of), black (a pair of) and blue (a pair of) fish folder are connected with warning (a pair of), locking (a pair of) and locking 2 or superpressure (a pair of) contact of density monitor respectively.
2. if use the AC220V power work, connect external power source, the power-on switch; If use self-contained battery work, direct power-on switch, preheating 5 minutes.
3. enter by menu operation and prepare the verification screen.
4. whether observe force value meets the requirements.If force value is on the low side, slowly open air reservoir valve F again, after the observation force value has arrived desired force value, just close air reservoir valve F.
5. counter-clockwise direction is shaken handwheel then, reduces pressure, to during the ratings of the density monitor tested, and according to the prompting on the LCD screen, first verification ratings.And then according to the prompting on the LCD screen, counter-clockwise direction is shaken handwheel again, reduces pressure, and to during the locking value of the density monitor tested, clockwise direction is shaken handwheel again, and pressure boost is up to the warning rreturn value of the density monitor of being tested.
6. print or stores it according to screen prompt.
7. verification is opened air reservoir valve F after hours, shakes handwheel clockwise, till active on earth, closes air reservoir valve F then.SF6 gas in the pressure regulating cylinder pushes back among the SF6 gas air reservoir again at this moment.Throw off and connect tracheae.
8. turn off power switch, restore.
For the testing nominative function of giving prominence to the key points, below among each embodiment, how accurately the connection of all having omitted instrument stresses that the ratings of corresponding 20 ℃ of force value of measured relay correctly obtains, i.e. the tester ratings of density measurement relay.
Tester is according to the pointer of test article, the indicated value of observation test product, earlier pressure is adjusted to the just in time ratings size of test article, the pointer that is test article just in time refers at ratings Pe, press ratings test command key then, tester will write down the pressure P value and the temperature T value of current pressure sensor and temperature sensor automatically; According to the pressure-temperature characteristic relation of SF6 gas, be converted into 20 ℃ of corresponding pressure value P e automatically and survey then.Tester is surveyed the Pe that is tested automatically and is revised, and this test result is stored according to the linear relationship of pressure transducer and temperature sensor then.
Automatically the Pe that is tested is surveyed and revise, its modified computing method is: A) can amount of imports definite value in advance Pe, and according to this ratings Pe, its modified computing method is: the ratings=Pe-of the actual test of P (the Pe survey-Pe)=the 2Pe-Pe survey; B again) also can generally be no more than 5 grades thinking,, test value Pe be surveyed the ratings Pe that rounds up and obtain this relay according to the method that rounds up according to the error of density monitor; Tester is surveyed the Pe that is tested automatically and is revised then, and its modified computing method is: and the ratings=Pe-of the actual test of P (the Pe survey-Pe)=the 2Pe-Pe survey.
Tester can calculate error automatically, the ratings-Pe of the actual test of the actual test=p of its error delta P.And can store this result of calculation.
Tester can judge the ratings of being tested according to its precision Δ P requirement, if | the actual test of Δ P |≤| precision Δ P|, tester just can judge that its ratings precision meets the requirements; If | the actual test of Δ P |＞| precision Δ P|, tester just can judge that its ratings precision is undesirable; And can store this judged result.
Tester can also be printed this related data and result, and this test data and result have the power-failure memory function.
Pe surveyed revise, Error Calculation, any one or some or all of during the ratings of being tested judged can also or manually handle in conjunction with the daemon software of tester, promptly can revise in the tester outside.
Ratings test command key form can be versatile and flexible, and is unrestricted, for example can be undertaken by the mode that selector button, selector switch, keyboard, touch-screen or man-machine conversation are linked up; Described operation keyboard and display screen can join together.
Can also utilize output interface and computing machine to carry out communication, test data is input in the computing machine, further process again by computing machine.
According to the request for utilization of tester, earlier peripheral gas circuit and circuit are connected, begin to enter the verification state, utilize the ratings parameter value of the relay that man-machine interface 20 input earlier of tester tested: i.e. ratings Pe and its precision Δ P; The test No. of input institute busy relay.Enter ' verification ratings ' menu (state): according to the pointer of test article, the indicated value of observation test product, earlier pressure is adjusted to the just in time ratings size of test article, the pointer that is test article just in time refers at ratings Pe, press the test command key then, present embodiment is for pressing ' ENTER ' key, and (ratings test command key form can be versatile and flexible, unrestricted, for example can adopt external selector button, keyboard or a switch; Can adopt the liquid crystal upper keyboard, also can adopt the touch-screen on the touch LCD to operate or the like).Tester will write down the pressure P value and the temperature T value of current pressure sensor and temperature sensor automatically this moment; Then according to SF
6The pressure-temperature characteristic relation of gas is converted into 20 ℃ of corresponding pressure value P e automatically and surveys.Tester is surveyed the Pe that is tested automatically and is revised according to the linear relationship of pressure transducer and temperature sensor then, and its modified computing method is: and the ratings=Pe-of the actual test of P (the Pe survey-Pe)=the 2Pe-Pe survey.Ratings-the Pe of the actual test of the actual test=P of its error delta P.If the ratings Pe=0.6Mpa of the density monitor of being tested for example, precision Δ P=± 0.15Mpa, and Pe survey=0.605Mpa, ratings=0.6Mpa-(the 0.605Mp-0.6Mpa)=0.595Mpa of the actual test of P so, ratings-the Pe=0.595-0.6=-0.005Mpa of the actual test of the actual test=P of its error delta P, cause | the actual test of Δ P |=|-0.005|Mpa≤| precision Δ P=± 0.15|Mpa, so tester just can be judged its ratings precision and meet the requirements, can also store this related data.Simultaneously can print this related data, can judge whether test value is qualified, can calculate error size automatically, this test data has the power-failure memory function.If the ratings Pe=0.6Mpa of the density monitor of for example being tested again, precision Δ P=± 0.15Mpa, and Pe survey=0.574Mpa, ratings=0.6Mpa-(the 0.574Mp-0.6Mpa)=0.626Mpa of the actual test of P so, the ratings-Pe=0.626-0.6=0.026Mpa of the actual test of the actual test=P of its error delta P; Cause | the actual test of Δ P |=| 0.026|Mpa＞| precision Δ P=± 0.15|Mpa, so tester just can judge that its ratings precision is undesirable.Same tester can store this related data at storer 7.Simultaneously can print this related data, can judge whether test value is qualified, can calculate error size automatically, this test data has the power-failure memory function.We just can be easily to SF
6The ratings of gas density relay carries out verification, promptly can test out SF easily
6The ratings of gas density relay and its error, and these related datas can be stored easily, print, and judge, handle, and further can print or work out test report, very convenient, can be subjected to user of service's welcome deeply.Can also utilize output interface and computing machine to carry out communication, further process.
Embodiment 2
According to the request for utilization of tester, earlier peripheral gas circuit and circuit are connected, begin to enter the verification state, utilize the accuracy requirement Δ P of the ratings Pe of the density monitor that man-machine interface 20 input earlier of tester tested; Import the test No. of institute's busy relay again.Enter ' verification ratings ' menu (state): according to the pointer of test article, the indicated value of observation test product, earlier pressure is adjusted to the just in time ratings size of test article, the pointer that is test article just in time refers at ratings Pe, press the test command key then, present embodiment is for pressing ' ENTER ' key, and (ratings test command key form can be versatile and flexible, unrestricted, for example can adopt external selector button, keyboard or a switch; Can adopt the liquid crystal upper keyboard, also can adopt the touch-screen on the touch LCD to operate or the like).Tester will write down the pressure P value and the temperature T value of current precision pressure sensor and precision temperature sensor automatically this moment; Then according to SF
6The pressure-temperature characteristic relation of gas is converted into 20 ℃ of corresponding pressure value P e automatically and surveys.Tester is according to the linear relationship of precision pressure sensor and temperature sensor then, generally be no more than 5 grades thinking then according to the error of density monitor, according to the method that rounds up, test value Pe is surveyed the ratings Pe that rounds up and obtain this relay; Tester is surveyed the Pe that is tested automatically and is revised then, and its modified computing method is: and the ratings=Pe-of the actual test of P (the Pe survey-Pe)=the 2Pe-Pe survey.Ratings-the Pe of the actual test of the actual test=P of its error delta P.If its precision Δ of the ratings of the density monitor of being tested P=± 0.15Mpa for example, and Pe survey=0.605Mpa, can obtain ratings Pe=0.6Mpa so, ratings=0.6Mpa-(the 0.605Mp-0.6Mpa)=0.595Mpa of the actual test of P so, ratings-the Pe=0.595-0.6=-0.005Mpa of the actual test of the actual test=P of its error delta P, cause | the actual test of Δ P |=|-0.005|Mpa≤| precision Δ P=± 0.15|Mpa, so tester just can be judged its ratings precision and meet the requirements, can store this related data at storer 7.Simultaneously can print this related data, can judge whether test value is qualified, can calculate error size automatically, this test data has the power-failure memory function.If its precision Δ of the ratings of the density monitor of being tested P=± 0.15Mpa for example, and Pe survey=0.574Mpa, can obtain ratings Pe=0.6Mpa so, ratings=0.6Mpa-(the 0.574Mp-0.6Mpa)=0.626Mpa of the actual test of P so, the ratings-Pe=0.626-0.6=0.026Mpa of the actual test of the actual test=P of its error delta P; Cause | the actual test of Δ P |=| 0.026|Mpa＞| precision Δ P=± 0.15|Mpa, so tester just can judge that its ratings precision is undesirable.If the precision of density monitor is very poor in this way, will there be the possibility of makeing mistakes in error greater than 5 grades, does not generally adopt this method.Same tester can store this related data.Simultaneously can print this related data, can judge whether test value is qualified, can calculate error size automatically, this test data has the power-failure memory function.We just can be easily to SF
6The ratings of gas density relay carries out verification, promptly can test out SF easily
6The ratings of gas density relay and its error, and these related datas can be stored easily, print, and judge, handle, and further can print or work out test report, very convenient, can be subjected to user of service's welcome deeply.Equally, can also utilize output interface and computing machine to carry out communication, further process.
More than two kinds of methods, the accuracy requirement Δ P of ratings Pe is the input validation instrument not, tester can only be measured ratings automatically.Error (precision) calculating and result and handle in other place.This method can be versatile and flexible, and is unrestricted.Promptly can also utilize output interface and computing machine to carry out communication, test data is input in the computing machine, further process again by computing machine.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, and all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (6)
1. the SF of an automatic testing nominative
6Gas density relay checking instrument, the source of the gas that comprises an adjustable in pressure provides mechanism, at least one pressure transducer, a temperature sensor, an operation keyboard, a computer data processing system and a display screen, computer data processing system is provided with the relay action signal input port, it is characterized in that: described source of the gas provides mechanism to provide mechanism for the source of the gas of adjustable in pressure.
2. the SF6 gas density relay checking instrument of automatic testing nominative according to claim 1, it is characterized in that, the source of the gas of described adjustable in pressure provides mechanism to comprise a pressure regulating cylinder that is used to provide source of the gas, piston is housed in the pressure regulating cylinder, piston is connected with an adjuster bar, handwheel is equipped with in the adjuster bar outer end, and handwheel drives adjuster bar and then the drive piston moves in pressure regulating cylinder by rotating, and realizes the adjusting to bleed pressure in the pressure regulating cylinder.
3. the SF of automatic testing nominative according to claim 1
6Gas density relay checking instrument is characterized in that, tester comprises that also one can be carried out memory storing to the result who calculates error automatically.
4. the SF of automatic testing nominative according to claim 1 and 2
6Gas density relay checking instrument is characterized in that, described tester also comprises a data output interface, to export and to print this related data and result.
5. the SF of automatic testing nominative according to claim 1 and 2
6Gas density relay checking instrument is characterized in that, described ratings test command key is that the mode that button, selector switch, keyboard, touch-screen or man-machine conversation are linked up is carried out.
6. the SF of automatic testing nominative according to claim 1 and 2
6Gas density relay checking instrument is characterized in that, described operation keyboard and display screen join together, are touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200661531U CN201004041Y (en) | 2007-01-08 | 2007-01-08 | SF6 air density relay calibrator for automatic rated value test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200661531U CN201004041Y (en) | 2007-01-08 | 2007-01-08 | SF6 air density relay calibrator for automatic rated value test |
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| Publication Number | Publication Date |
|---|---|
| CN201004041Y true CN201004041Y (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200661531U Expired - Fee Related CN201004041Y (en) | 2007-01-08 | 2007-01-08 | SF6 air density relay calibrator for automatic rated value test |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048616A (en) * | 2012-12-26 | 2013-04-17 | 山东电力集团公司淄博供电公司 | Live calibration device for SF6 (sulfur hexafluoride) density relay |
| CN103983538A (en) * | 2012-07-30 | 2014-08-13 | 常兴 | Working method of SF6 moisture and density measurement device of SF6 electrical equipment |
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN106680707A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | System, device and method for heavy gas action setting value of double-float gas relay |
| CN109342938A (en) * | 2018-11-29 | 2019-02-15 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment based on secondary singal |
| WO2021043037A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Gas density relay verification device and verification method therefor |
-
2007
- 2007-01-08 CN CNU2007200661531U patent/CN201004041Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983538A (en) * | 2012-07-30 | 2014-08-13 | 常兴 | Working method of SF6 moisture and density measurement device of SF6 electrical equipment |
| CN103983538B (en) * | 2012-07-30 | 2016-03-23 | 常兴 | SF 6the SF of electrical equipment 6the method of work of moisture, density measuring equipment |
| CN103048616A (en) * | 2012-12-26 | 2013-04-17 | 山东电力集团公司淄博供电公司 | Live calibration device for SF6 (sulfur hexafluoride) density relay |
| CN104964815A (en) * | 2015-07-01 | 2015-10-07 | 许继（厦门）智能电力设备股份有限公司 | SF6 density relay pressure contact detecting device |
| CN106680707A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | System, device and method for heavy gas action setting value of double-float gas relay |
| CN106680707B (en) * | 2017-03-06 | 2023-10-17 | 云南电网有限责任公司电力科学研究院 | Method, device and system for checking heavy gas action setting value of double-float gas relay |
| CN109342938A (en) * | 2018-11-29 | 2019-02-15 | 国网四川省电力公司检修公司 | A kind of SF6 density monitor calibration equipment based on secondary singal |
| CN109342938B (en) * | 2018-11-29 | 2024-03-15 | 国网四川省电力公司检修公司 | SF6 density relay calibration device based on secondary signal |
| WO2021043037A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Gas density relay verification device and verification method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Jiufeng Automotive Parts Co., Ltd. Assignor: Su Lifang Contract fulfillment period: 2008.10.16 to 2013.10.15 Contract record no.: 2008310000289 Denomination of utility model: SF6 air density relay calibrator for automatic rated value test Granted publication date: 20080109 License type: Exclusive license Record date: 20081212 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.16 TO 2013.10.15; CHANGE OF CONTRACT Name of requester: SHANGHAI JIUFENG CAR LINGJIAN CO., LTD. Effective date: 20081212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20160108 |