CN202815116U - Full temperature SF6 gas density relay checking device using software compensation - Google Patents
Full temperature SF6 gas density relay checking device using software compensation Download PDFInfo
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- CN202815116U CN202815116U CN 201220478301 CN201220478301U CN202815116U CN 202815116 U CN202815116 U CN 202815116U CN 201220478301 CN201220478301 CN 201220478301 CN 201220478301 U CN201220478301 U CN 201220478301U CN 202815116 U CN202815116 U CN 202815116U
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- density relay
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- gas density
- software compensation
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- 210000003437 trachea Anatomy 0.000 claims description 13
- 238000012795 verification Methods 0.000 description 27
- 238000000034 method Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 3
- 241000486406 Trachea Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Abstract
The utility model relates to a checking apparatus and especially relates to a full temperature SF6 gas density relay checking device using software compensation and the device is capable of checking an SF6 gas density relay under extreme low or high temperature conditions. The device comprises a housing and a high-low temperature thermotank arranged outside the housing and is characterized in that the high-low temperature thermotank is internally equipped with a density relay and a temperature sensor, an SF6 gas storage tank is fixed in the lower part inside the housing, the top part of the gas storage tank is connected with a four-way joint, the other three ends of the four-way joint are respectively connected with a pressure sensor, a pressure adjusting device and a controller used for controlling an industrial control computer, all the components are connected through a gas pipe, and the industrial control computer is provided with a density relay action signal input port which is connected with a contact connecting wire. The full-temperature SF6 gas density relay checking device using software compensation is unique in structure, convenient to use and operate, high in full temperature precision and reliable in checking.
Description
Technical field
The utility model relates to a kind of calibration equipment, especially relates to a kind of a kind of total temperature SF6 gas density relay calibration equipment that adopts software compensation that can carry out verification under limit low temperature or the condition of high temperature to the SF6 gas density relay.
Background technology
The SF6 gas density relay is one of key element of SF6 electrical equipment, and it is used for detecting the variation of SF6 gas density in the SF6 electrical equipment body, and its performance quality directly has influence on the reliable and secure operation of SF6 electrical equipment.Be installed on on-the-spot SF6 gas density relay because of not often action, the phenomenon of dumb or poor contact of contacts often appears moving in after date during through one section, what have also the temperature compensation degradation can occur, causes easily the misoperation of SF6 gas density relay when variation of ambient temperature.Therefore original power section has formulated DL/T259-2012 " SF6 gas density relay verification rules ".This testing regulations regulation: each SF6 electrical equipment applying unit should regularly be carried out verification to the SF6 gas density relay.From practical operation situation, it is to prevent trouble before it happens that the SF6 gas density relay is carried out periodic check, ensures one of necessary means of power equipment safety reliability service.Therefore the verification of SF6 gas density relay is paid much attention to and is popularized in electric system at present, and each electric company, generating plant, large-scale industrial enterprise all have been configured relevant SF6 gas density relay checking instrument.The method of calibration of present SF6 gas density relay mainly contains following several on the engineering:
1) utilize SF6 equipment gas replenishment process that density monitor is carried out verification.This method is mainly used in the scene, but has following problem: (1) temperature effect is large, is difficult to guarantee accuracy; (2) utilizing the table meter on the SF6 gas cylinder is the relative pressure table) reading, degree of accuracy is very poor, accuracy can not be guaranteed, to the density monitor (absolute pressure relay) of measuring the absolute pressure value method, just larger error may be directly produced in the area of height above sea level in addition; 3) the SF6 density monitor is applied to the step-down process, and comes verification with gas replenishment process, does not conform to practical situations, also affects the verification accuracy.
2) utilize SF6 equipment deflation course to the density monitor verification.Exist in this way with method 1 in the same problem in (1), (2), and to reclaim SF6 gas during venting, need with special SF6 gas concentration unit, very inconvenient.
3) in the constant temperature enclosure verification.This method of calibration is carried out in isoperibol, eliminated the error that temperature is brought verification, so the accuracy of verification is higher.But checking time is long in this way, need to set up special constant temperature laboratory, and will set up the full-time worker, has increased on-the-spot work difficulty, and is both uneconomical also inconvenient.In fact, be unpractical at the scene.Equally, to being the absolute pressure relay with the density monitor of measuring the absolute pressure value method, just may directly produce larger error in the area of height above sea level.
The present SF6 gas density relay checking instrument of employed various models in sum, although the pressure and temperature value when basically all adopting the test density actuating of relay, then according to the pressure-temperature characteristic relation of SF6 gas, force value when utilizing computing machine automatically to be converted into 20 ℃ namely can be carried out automatic dynamic temp compensation.But these calibration equipments, all exist same defective or mistake: these SF6 gas density relay checking instruments can only be tested to the SF6 gas density relay under the normal temperature state, in the full operating temperature range SF6 gas density relay is carried out verification and can not carry out, particularly under limit low temperature or the condition of high temperature, the SF6 gas density relay is carried out verification.Because at normal temperatures, its precision is to realize easily, can not reflect the safe mass problem.But these SF6 gas density relay checking instruments can only be tested to the SF6 gas density relay under the normal temperature state, in the full operating temperature range SF6 gas density relay is carried out verification and can not carry out, particularly under limit low temperature or the condition of high temperature, the SF6 gas density relay is carried out verification; Also do not overcome at present the calibration equipment of defects.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of structure unique, use easy to operate, the total temperature precision high, verification reliable, can realize to various SF6 gas density relays a kind of total temperature SF6 gas density relay calibration equipment that adopts software compensation of the accurate verification in the total temperature scopes.
In order to realize the utility model purpose, the utility model is realized in the following way:
A kind of total temperature SF6 gas density relay calibration equipment that adopts software compensation, comprise the outer high cryostat of housing and housing, it is characterized in that: density monitor and temperature sensor are housed in the high cryostat, the bottom is fixed with a SF6 gas storage tank in the housing, the gas storage tank top links to each other with a four-way connection, other three ends of four-way connection are connected with respectively pressure transducer, the controller of pressure adjustment assembly and control industrial computer, all be to link to each other by trachea between above-mentioned each part, above-mentioned industrial computer is provided with density monitor actuating signal input port, and this relay action signal input port is connected with the contact connecting line;
Described density monitor is fixed on the transportable density monitor erecting frame, and described density monitor erecting frame is connected, is connected with pressure-releasing electromagnetic valve by bleeder pipe again with described pressure adjustment assembly on gas circuit by trachea;
Trachea between described controller and the density monitor erecting frame is leaded up to valve and is linked to each other with described four-way connection by solenoid valve is synthetic, is connected with valve between described gas storage tank and the four-way connection;
Be connected with operation keyboard on the described industrial computer;
Described pressure adjustment assembly is that adjuster bar being connected by the piston that is equipped with in cylinder, the cylinder, piston and adjuster bar outer end are equipped with handwheel and are assembled;
Described piston is provided with the annular groove that studs with O-ring seal;
Described O-ring seal is the O RunddichtringO;
Described handwheel and adjuster bar are detachably to be movably connected to connect;
Described SF6 gas storage tank and pressure adjustment assembly are side by side.
The utility model has following effect:
1) structure is unique: the device that the utility model provides comprises housing and the outer high cryostat of housing, it is characterized in that: density monitor and temperature sensor are housed in the high cryostat, the bottom is fixed with a SF6 gas storage tank in the housing, the gas storage tank top links to each other with a four-way connection, other three ends of four-way connection are connected with respectively pressure transducer, the controller of pressure adjustment assembly and control industrial computer, all be to link to each other by trachea between above-mentioned each part, above-mentioned industrial computer is provided with density monitor actuating signal input port, and this relay action signal input port is connected with the contact connecting line; Described density monitor is fixed on the transportable density monitor erecting frame, and described density monitor erecting frame is connected, is connected with pressure-releasing electromagnetic valve by bleeder pipe again with described pressure adjustment assembly on gas circuit by trachea.
2) make and do not waste SF6 gas in the checking procedure, simultaneously by high cryostat verification in the various probe temperatures of institute, the realization total temperature scope be set again: industrial computer is provided with density monitor actuating signal input port in the device that the utility model provides, and this relay action signal input port is connected with the contact connecting line.Wherein temperature sensor is seated in the high cryostat; The density monitor of testing is installed on the density monitor erecting frame, and the density monitor erecting frame is connected with the adjustable pressure adjustment assembly of pressure on gas circuit by connecting tracheae, is connected with pressure-releasing electromagnetic valve by bleeder pipe again.The pressure signal that pressure transducer will offer tested density monitor is transferred to industrial computer, and temperature sensor is transferred to industrial computer with the temperature signal of tested density monitor.Industrial computer is by controller, valve, solenoid valve, by high cryostat various temperature are set, in the high cryostat of set temperature, regulate bleed pressure by pressure adjustment assembly, utilize pressure transducer and temperature sensor that the SF6 gas density relay is measured, force value and temperature value when obtaining the action of SF6 gas density relay; Pressure-temperature characteristic relation according to the force value of testing, temperature value and SF6 gas carries out the data processing, obtains corresponding 20 ℃ of force value, finishes the interior accurate verification to SF6 gas density relay performance of total temperature scope.Simultaneously can also export and print related data and result, wherein pressure adjustment assembly comprises a cylinder, piston is housed in the cylinder, piston is connecting an adjuster bar, handwheel is equipped with in the adjuster bar outer end, by rotate handwheel drive adjuster bar and then drive piston mobile in cylinder, can free activity adjustment pressure, realize that pressure adjustment assembly is to the adjusting of gaseous tension.Piston is provided with annular groove, and two " O " RunddichtringOs are set in the annular groove of piston, and major function is that piston seals when cylinder moving is regulated pressure.Handwheel can be movable, during use and adjuster bar combine, the time spent can be not for convenience detach.By the gas-holder of favorable sealing property, pressure adjustment assembly, valve, piston studs with O-ring seal, connects tracheae, pressure transducer, valve, adjuster bar, handwheel, density monitor erecting frame etc. have just been set up totally enclosed SF6 gas-circulating system, can make things convenient for, and be trickle, slowly, repeat, light adjustments of gas pressure makes and does not waste SF6 gas in the checking procedure.Simultaneously by high cryostat various probe temperatures are set again, realize verification in the total temperature scope.
3) use is easy to operate: the device that the utility model provides in use, the density monitor sealing of testing is installed on the density monitor erecting frame, again the density monitor erecting frame that density monitor is housed is seated in the high cryostat, closes simultaneously pressure-releasing electromagnetic valve; Again an end of SF6 gas connection tracheae is connected with the SF6 gas density relay connector of this density monitor erecting frame, and the other end of SF6 gas connection tracheae is connected with solenoid valve, after connecting.Opens solenoid valve and valve are observed force value, if pressure is inadequate, illustrate that gas is inadequate, just open valve, the gas of gas-holder are released, until gas is enough tested.Then valve-off, by the handwheel of pressure adjustment assembly, regulating piston just can be regulated the pressure of the SF6 gas density relay of testing, by the temperature of high cryostat is set, just can be in the total temperature scope verification density monitor.
4) overcome error, guaranteed precision: the device that the utility model provides can be realized a plurality of density monitors are carried out verification in the full operating temperature range, realize in the full operating temperature range SF6 gas density relay being carried out verification, particularly under limit low temperature or the condition of high temperature, the SF6 gas density relay is carried out verification.Simultaneously, pressure transducer is installed on the outer pressure adjustment assembly of high cryostat, can avoid under high temperature or the low temperature situation, and the temperature drift problem appears in pressure transducer, overcomes error, has guaranteed precision.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model pressure adjustment assembly.
Embodiment
A kind of total temperature SF6 gas density relay calibration equipment that adopts software compensation, comprise housing 4 and housing 4 outer high cryostats 2, as shown in Figure 1: density monitor 20 and temperature sensor 19 are housed in the high cryostat 2, housing 4 interior bottoms are fixed with a SF6 gas storage tank 5, gas storage tank 5 tops link to each other with a four-way connection 10, four-way connection 10 other three ends are connected with respectively pressure transducer 11, the controller 17 of pressure adjustment assembly 6 and control industrial computer 15, all be to link to each other by trachea between above-mentioned each part, above-mentioned industrial computer 15 is provided with density monitor 20 actuating signal input ports, and this relay action signal input port is connected with contact connecting line 16.
Described density monitor 20 is fixed on the transportable density monitor erecting frame 1, and described density monitor erecting frame 1 is connected, is connected with pressure-releasing electromagnetic valve 21 by bleeder pipe 22 again with described pressure adjustment assembly 6 on gas circuit by trachea.
Trachea between described controller 17 and the density monitor erecting frame 1 is leaded up to valve 13 and is linked to each other with described four-way connection 10 by solenoid valve 18 is synthetic, is connected with valve between described gas storage tank 5 and the four-way connection 10.
Be connected with operation keyboard 12 on the described industrial computer 15,
As shown in Figure 2: described pressure adjustment assembly 6 is that adjuster bar 64 being connected by the piston 62 that is equipped with in cylinder 61, the cylinder 61, piston 62 and adjuster bar 64 outer ends are equipped with handwheel 65 and are assembled.
Described piston 62 is provided with the annular groove that studs with O-ring seal 63.
Described O-ring seal 63 is the O RunddichtringO.
Described handwheel 65 is detachably to be movably connected to connect with adjuster bar 64.
Described SF6 gas storage tank 5 and pressure adjustment assembly 6 are side by side.
The utility model comprises housing 4, SF6 gas storage tank 5, four-way connection 10, pressure transducer 11, temperature sensor 19, high cryostat 2, density monitor erecting frame 1, some valves 7,13, some solenoid valves 18,21, some connection tracheaes 3,8,9,14,22, contact connecting line 16, industrial computer 15, controller 17, operation keyboard 12 and pressure adjustment assembly 6.One of them SF6 gas storage tank 5, four-way connection 10, pressure transducer 11, some valves 7,13, some solenoid valves 18,21, some connection tracheaes 8,9,14,22, industrial computers 15, controller 17, operation keyboard 12 and pressure adjustment assembly 6 all are assemblied in the housing 4.Wherein on the gas-holder 5 valve 7 is installed, the other end of valve 7 is connected with an end that is connected tracheae 8, communicates in gas circuit; Connect the other end of tracheae 8 and being connected of four-way connection 10; Pressure transducer 11 is installed on the four-way connection 10, four-way connection 10 also is connected with pressure adjustment assembly 6 by connecting tracheae 9, four-way connection 10 also is equipped with valve 13, and the other end of valve 13 is connected with an end that is connected tracheae 14, communicates in gas circuit; The other end that connects tracheae 14 is connected with solenoid valve 18, and the other end of solenoid valve 18 is connecting connection tracheae 3.
And density monitor erecting frame 1, temperature sensor 19 are assemblied in the high cryostat 2, are connected with solenoid valve 18 in the device case by connecting tracheae 3.Density monitor erecting frame 1 is transportable.
Its operation key step of the device that the utility model provides is as follows:
1, after gas circuit connects, with the aviation plug of test article density monitor 20 checkpoint contacts samplings wire 16 with the docking of the density monitor contact socket on the calibration equipment, verification point sampling wire other end redness is a pair of, black is a pair of be connected a pair of fish folder respectively a pair of with the warning of density monitor, locking is a pair of is connected with locking or superpressure one docking point is connected.Then set the test temperature of high cryostat 2, and open high cryostat 2.
2. connect external power source, the power switch of opening device is waited for temperature and the trial target of high cryostat 2, behind the equalized temperature of density monitor 20.
3. enter by menu operation and prepare the verification screen.For the nominal parameter of the SF6 density monitor of testing, confirm to proving installation.
4. whether observe force value meets the requirements.If force value is on the low side, slowly open again valve 7 on the gas-holder 5, after the observation force value has arrived desired force value, just close this valve 7.
5. then counter-clockwise direction is shaken handwheel, reduces pressure, to during the ratings of the density monitor tested, and according to the prompting on the industrial computer LCD screen, first verification ratings.And then according to the prompting on the industrial computer LCD screen, counter-clockwise direction is shaken handwheel again, reduce pressure, to when the warning of the density monitor tested or locking value, clockwise direction is shaken handwheel again, increase pressure, until the warning of the density monitor of testing or locking rreturn value, temperature value during then according to test obtains by temperature sensor and the pressure-temperature characteristic relation of SF6 gas is converted to corresponding 20 ℃ of absolute pressure value automatically, finishes the qualification to this SF6 gas density relay;
6. print or stores it according to screen prompt.
Verifying work complete after, Open valve 7 shakes handwheel clockwise, until till active on earth, then valve-off 7.SF6 gas in the pressure adjustment assembly pushes back among the SF6 gas storage tank again at this moment.
8. open pressure-releasing electromagnetic valve 16, residual and unrenewable SF6 gas discharging to outdoor, is thrown off the connection tracheae again.
9. turn off power switch, restore, whole checking procedure is complete.
Claims (4)
1. total temperature SF6 gas density relay calibration equipment that adopts software compensation, comprise the outer high cryostat (2) of housing (4) and housing (4), it is characterized in that: density monitor (20) and temperature sensor (19) are housed in the high cryostat (2), the interior bottom of housing (4) is fixed with a SF6 gas storage tank (5), gas storage tank (5) top links to each other with a four-way connection (10), other three ends of four-way connection (10) are connected with respectively pressure transducer (11), the controller (17) of pressure adjustment assembly (6) and control industrial computer (15), all be to link to each other by trachea between above-mentioned each part, above-mentioned industrial computer (15) is provided with density monitor (20) actuating signal input port, and this relay action signal input port is connected with contact connecting line (16).
2. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 1, it is characterized in that: described density monitor (20) is fixed on the transportable density monitor erecting frame (1), and described density monitor erecting frame (1) is connected with described pressure adjustment assembly (6) on gas circuit, is connected with pressure-releasing electromagnetic valve (21) by bleeder pipe (22) again by trachea.
3. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 1 or 2, it is characterized in that: the trachea between described controller (17) and the density monitor erecting frame (1) is leaded up to valve (13) and is linked to each other with described four-way connection (10) by solenoid valve (18) is synthetic, is connected with valve between described gas storage tank (5) and the four-way connection (10).
4. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 1 is characterized in that: be connected with operation keyboard (12) on the described industrial computer (15),
5. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 1 is characterized in that: described pressure adjustment assembly (6) is that the adjuster bar (64) that connected by the piston (62) that is equipped with in cylinder (61), the cylinder (61), piston (62) and adjuster bar (64) outer end are equipped with handwheel (65) and are assembled.
6. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 5, it is characterized in that: described piston (62) is provided with the annular groove that studs with O-ring seal (63).
7. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 5, it is characterized in that: described O-ring seal (63) is the O RunddichtringO.
8. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 5 is characterized in that: described handwheel (65) is detachably to be movably connected to connect with adjuster bar (64).
9. the total temperature SF6 gas density relay calibration equipment of employing software compensation as claimed in claim 1, it is characterized in that: described SF6 gas storage tank (5) and pressure adjustment assembly (6) are side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220478301 CN202815116U (en) | 2012-09-19 | 2012-09-19 | Full temperature SF6 gas density relay checking device using software compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220478301 CN202815116U (en) | 2012-09-19 | 2012-09-19 | Full temperature SF6 gas density relay checking device using software compensation |
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| CN202815116U true CN202815116U (en) | 2013-03-20 |
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| CN 201220478301 Expired - Fee Related CN202815116U (en) | 2012-09-19 | 2012-09-19 | Full temperature SF6 gas density relay checking device using software compensation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841282A (en) * | 2012-09-19 | 2012-12-26 | 宁夏电力公司电力科学研究院 | Software compensation type all-temperature SF 6 gas density relay check device |
| CN104597340A (en) * | 2014-12-26 | 2015-05-06 | 华北电力大学 | Low-temperature electrical characteristics testing device for air |
| CN104698371A (en) * | 2013-12-04 | 2015-06-10 | 上海乐研电气科技有限公司 | Multifunctional gas density relay calibration device |
| CN110542854A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
| CN110542852A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | transformation method of gas density relay |
-
2012
- 2012-09-19 CN CN 201220478301 patent/CN202815116U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841282A (en) * | 2012-09-19 | 2012-12-26 | 宁夏电力公司电力科学研究院 | Software compensation type all-temperature SF 6 gas density relay check device |
| CN104698371A (en) * | 2013-12-04 | 2015-06-10 | 上海乐研电气科技有限公司 | Multifunctional gas density relay calibration device |
| CN104597340A (en) * | 2014-12-26 | 2015-05-06 | 华北电力大学 | Low-temperature electrical characteristics testing device for air |
| CN104597340B (en) * | 2014-12-26 | 2017-05-17 | 华北电力大学 | Low-temperature electrical characteristics testing device for air |
| CN110542854A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
| CN110542852A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | transformation method of gas density relay |
| CN110542852B (en) * | 2019-09-04 | 2022-08-26 | 上海乐研电气有限公司 | Transformation method of gas density relay |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20140919 |
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| EXPY | Termination of patent right or utility model |