CN104698371A - Multifunctional gas density relay calibration device - Google Patents

Multifunctional gas density relay calibration device Download PDF

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Publication number
CN104698371A
CN104698371A CN201310641562.XA CN201310641562A CN104698371A CN 104698371 A CN104698371 A CN 104698371A CN 201310641562 A CN201310641562 A CN 201310641562A CN 104698371 A CN104698371 A CN 104698371A
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China
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gas
valve
temperature
way
interface
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CN201310641562.XA
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金海勇
郭正操
王乐乐
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Shanghai Roye Electric Co Ltd
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Shanghai Roye Electric Science and Technology Co Ltd
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Priority to CN201310641562.XA priority Critical patent/CN104698371A/en
Publication of CN104698371A publication Critical patent/CN104698371A/en
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Abstract

The invention relates to electrical instrument calibration equipment, and particularly relates to a multifunctional gas density relay calibration device, which comprises a shell, a gas storage cylinder, a constant temperature box, a group of gas cylinders, and a controller, wherein the shell is internally provided with a set of computer control system in control connection with a relative pressure sensor and an absolute pressure sensor, the two sensor are connected with a first interface and a second interface of a five-way joint respectively, the third interface of the five-way joint is connected with a four-way joint via a valve, and the second interface of the four-way joint is connected with a vacuum pump; the gas storage cylinder is parallelly connected with an adjusting cylinder and is then connected onto a valve between the five-way joint and the four-way joint and close to the four-way joint; the constant temperature box is internally provided with the adjusting cylinder, a temperature sensor, the gas storage cylinder and a testing frame with a three-way joint and is arranged outside the shell, and the gas storage cylinder and the adjusting cylinder are connected onto the fourth interface and the fifth interface of the five-way joint; the group of gas cylinders is used for supplementing gas for a to-be-detected density relay; and the controller is in control connection with each solenoid valve. A gas density relay with each measurement principle can be accurately calibrated at full temperature.

Description

A kind of multifunctional gas density monitor calibration equipment
Technical field
The present invention relates to a kind of calibration equipment of electric apparatus, particularly a kind of calibration equipment of gas density relay.
Background technology
SF 6electric switch has been widely used in power department, industrial and mining enterprises, facilitates the fast development of power industry.How to ensure SF 6reliable and secure operation one of vital task becoming power department of electric switch.SF 6gas density relay is SF 6one of key element of electric switch, it is used for detecting SF 6sF in electric switch body 6the change of gas density, its performance quality directly has influence on SF 6the reliable and secure operation of electric switch.Be installed on on-the-spot SF 6gas density relay is because of infrequently action, and through one section time, the phenomenon of the dumb or poor contact of contacts of action often appears in after date, and the temperature compensation performance that also there will be had is deteriorated, and easily causes SF when variation of ambient temperature 6gas density relay misoperation.Therefore original power portion has formulated DL/T596-1996 " power equipment preventive trial code ".This testing regulations specifies: each SF 6electric switch applying unit should regularly to SF 6gas density relay verifies.From practical operation situation, to SF 6it is prevent trouble before it happens that gas density relay carries out periodic check, ensures one of necessary means of power equipment safety reliability service.So current SF 6the verification of gas density relay has been paid much attention in electric system and has popularized, and each electric company, generating plant, large-scale industrial enterprise have been configured relevant SF all 6gas density relay checking instrument.And these SF 6gas density relay checking instrument can only to SF under normal temperature state 6gas density relay is tested, and can not carry out in full operating temperature range SF 6gas density relay verifies, particularly under limit low temperature or the condition of high temperature to SF 6gas density relay verifies.Because at normal temperatures, its precision easily realizes, and can not reflect safe mass problem.And density monitor is actually and operates in low temperature or hot environment, we only have the verification carried out it within the scope of total temperature, could real its quality condition of inspection, reflect its problem.Such as, at the beginning of 2009, owing to running into extreme cold weather, at China's North China Power Telecommunication Network, Xinjiang Power, operating SF 6there is large-area warning or latch-up phenomenon in the density monitor of electrical equipment, has plenty of SF according to analysis 6gas liquefaction and reporting to the police or locking, and have plenty of density monitor and occur false alarm or locking, even report to the police or locking.If so we are only to these SF 6gas density relay carries out normal temperature verification, does not just know where to begin to the fine verifying work of density monitor, judges just not know where to begin to the quality of density monitor.And SF 6gas density relay quality its reason that has problems is as follows:
(1) due to the defect in design, can there is inefficacy (never action) when low temperature, this situation is difficult to pinpoint the problems at normal temperature.
(2) due to the defect in design, when high temperature, action and displayed value can seriously be deteriorated, and this situation is difficult to pinpoint the problems at normal temperature.
(3) due to problem of manufacturing qualities own, there is temperature compensation inaccurate, error is seriously bigger than normal, and this situation is difficult to pinpoint the problems at normal temperature.
(4) due to timeliness or material problem, the time one is long, and will drift about, especially at low or elevated temperatures, precision can be seriously bigger than normal.
(5) for relative cavate density monitor, due to inherent or transient cause, standard chamber can leak gas, and there is working value error and loses efficacy greatly or even.This situation is difficult to pinpoint the problems at normal temperature, only just can pinpoint the problems when low temperature or high temperature verification.
(6) due to its contact of relay of generally using for magnetic helps formula electric contact, contact closure power own is little, and the time is slightly long, and contact one is oxidized, contact will obstructed or contact unreliable.For without oil type, magnetic helps formula electric contact contact to expose in atmosphere, is very easy to oxidation or long-pendingly has dust, the easy loose contact or obstructed of its contact; For oil-filled type, although magnetic helps formula electric contact contact to be immersed in silicone oil, the time is long, and after action for several times, its contact performance can decline, and adds that oil film has insulating effect, and its contact also can loose contact or obstructed.This situation is difficult to pinpoint the problems at normal temperature, only just can pinpoint the problems when low temperature or high temperature verification.
(7) resistance to shock own does not pass a test, and after switch deciliter intense impact, occurs the faults such as pointer is stuck, contact lost efficacy forever (being failure to actuate or a direct acting), deviation exceeds standard.
(8) due to leakage of oil, its resistance to shock declines, and after switch deciliter intense impact, occurs the faults such as pointer is stuck, contact lost efficacy forever (being failure to actuate or a direct acting), deviation exceeds standard.
(9) be subject to high vibration due to during transport, can relay failure be caused, deterioration in accuracy.
(10) due to component quality problem, the time is slightly long, density monitor may be caused to lose efficacy, make its deterioration in accuracy.
More than absolutely prove SF 6the inspection that gas density relay carries out within the scope of total temperature is very important, only in this way guarantee SF 6the quality of density monitor, the safe operation of electrical network.Further, current electric power grass-roots unit is to SF 6the verification of gas density relay is relatively more ignorant, compares headache.Obviously knowing will to SF used 6gas density relay carries out the verification in operating temperature range, can not know where to verify? also don't you know how to verify? unusual trouble and inconvenience are brought to their work, greatly affects work efficiency, the safe operation also affecting electrical network of most critical.And also do not have such relevant device at present, so a kind of " total temperature " SF of research and development 6gas density relay calibration equipment is very necessary and important.
In addition along with the change of global climate, extreme climate occurs often.Normally there is extreme low temperature weather, cause many SF 6the SF of switch 6there is liquefaction phenomenon in gas, and causes large-area power-cuts.So many places, the especially north, now more and more employing SF 6the electrical equipment of mixed gas, thus SF 6mixed gas density monitor uses and also gets more and more.Therefore also need to solve SF 6the check problem of mixed gas density monitor, so just need exploitation one to have verification SF 6the device of mixed gas density monitor.
Current SF 6the method of calibration of gas density relay, engineering mainly contains following several:
1, SF is utilized 6equipment gas replenishment process verifies density monitor.This method is mainly used in scene, but there is following problem: the impact of (1) temperature is large, is difficult to ensure accuracy; (2) SF is utilized 6table meter (relative pressure table) reading on gas cylinder, degree of accuracy is very poor, can not accuracy be ensured, in addition to the density monitor (absolute pressure relay) measuring absolute pressure value method, just may directly produce larger error in the area of height above sea level; 3) SF 6density monitor is applied to pressure reduction, and verifies with gas replenishment process, does not conform to practical situations, also impact verification accuracy.
2, SF is utilized 6equipment deflation course verifies density monitor.There is the problem same with (1) in method 1, (2) in this way, and will to SF when exitting 6gas reclaims, and needs with special SF 6gas concentration unit, very inconvenient.
3, verify at constant temperature enclosure.This method of calibration is carried out in isoperibol, and eliminate temperature to verifying the error brought, the accuracy therefore verified is higher.But checking time is long in this way, needs to set up special constant temperature laboratory, and will full-time worker be set up, increase on-the-spot work difficulty, both uneconomical also inconvenient.In fact, be unpractical at the scene.Equally, to the density monitor (absolute pressure relay) measuring absolute pressure value method, just larger error may directly be produced in the area of height above sea level.
4, the SF of current used various models 6gas density relay checking instrument, although pressure and temperature value when substantially all adopting the test density actuating of relay, then according to SF 6the pressure-temperature characteristic relation of gas, force value when utilizing computing machine to be automatically converted into 20 DEG C, namely can carry out automatic dynamic temp compensation.But these calibration equipments, all also exist same defect or mistake: these SF 6gas density relay checking instrument can only to SF under normal temperature state 6gas density relay is tested, and can not carry out in full operating temperature range SF 6gas density relay verifies, particularly under limit low temperature or the condition of high temperature to SF 6gas density relay verifies, because at normal temperatures, its precision easily realizes, and can not reflect safe mass problem; In addition according to SF 6the pressure-temperature characteristic relation of gas, Main Basis SF 6mathematical model between the pressure-temperature of gas and force value when utilizing computing machine to be automatically converted into 20 DEG C, namely can carry out automatic dynamic temp compensation, can there is error; These testers can only verify pure SF simultaneously 6gas density relay, and can not SF be verified 6mixed gas density monitor.These SF in addition 6gas density relay checking instrument is to the density monitor (absolute pressure relay) undertaken by measurement absolute pressure value method, just larger error may be directly produced in the area of height above sea level, in a lot of local air pressure high season or low season, also may produce larger error, have a strong impact on test accuracy.Because these SF at present 6gas density relay calibration equipment is all adopt the method measuring relative pressure to carry out.When testing the density monitor being actually and being undertaken by measurement absolute pressure value method, if want accurately, just must manually revise its test value, this bothers very much and inconvenience.
In order to solve the problem, the applicant once provided multiple SF 6gas density relay calibration equipment (see Chinese patent application 201220002322.6,201210347926.9,201220478301.1,201210347820.9 and 201220477478.X).These SF 6gas density relay calibration equipment can solve some above-mentioned problems, for the safe operation of electrical network provides effect.But along with SF 6the appearance of mixed gas electrical equipment, to SF 6the verification of mixed gas density monitor just seems very urgent, but these SF 6gas density relay calibration equipment just seems helpless.In addition patent 201220002322.6,201210347926.9 and 201220478301.1 is only had and adopt software compensation mensuration, just there is the not high problem of precision, be difficult to meet laboratory high precision verification density monitor.And pure SF can only be verified for patent 201210347820.9 and 201220477478.X 6gas density relay, and can not SF be verified 6mixed gas density monitor; In addition owing to adopting actual gas compensating measure, its efficiency is low, very time-consuming, and in many engineer applied, adopts software compensation mensuration just can meet the demands.So need to innovate existing technology, or carry out " hybridization " innovation.
In sum, also there is no so multi-functional relevant device at present, so be starved of now innovation and creation to go out a kind of multi-functional calibration equipment and its method of calibration can test various measuring principle accurately SF at " total temperature " 6gas density relay, can accurately verify SF again simultaneously 6mixed gas density monitor, meets the requirement of the various density monitor of laboratory high-acruracy survey; There is again software compensation mensuration simultaneously, can test the SF of various measuring principle at total temperature 6gas and SF 6mixed gas density monitor, meets the demand that engineer applied tests various density monitor, can raise the efficiency simultaneously.
 
Summary of the invention
Object of the present invention, is the deficiency overcoming the existence of above-mentioned prior art, provides a kind of multi-functional density monitor calibration equipment: actual gas compensation measuring method can be utilized to verify the SF of various measuring principle accurately at total temperature 6gas and SF 6the SF of mixed gas density monitor 6gas density relay calibration equipment, meets laboratory requirements for high precision; Meanwhile, software compensation mensuration can be utilized to verify the SF of various measuring principle at total temperature 6gas and SF 6the SF of mixed gas density monitor 6gas density relay calibration equipment, meets engineer applied and efficient demand.
The object of the present invention is achieved like this:
A kind of multifunctional gas density monitor calibration equipment, it comprises: the shell of calibration equipment, is provided with in shell:
A set of computer control system with keyboard and display, input connects relative pressure sensor and the absolute pressure transducer of computer control system control, relative pressure sensor is connected to the first interface of a five-way, absolute pressure transducer is connected to the second interface of this five-way by a valve, 3rd interface of this five-way connects a four-way by a valve, and this four-way second interface connects one by a valve, solenoid valve and establishes vacuum pump in the enclosure;
An air reservoir, it by after valve in parallel adjusting cylinders successively by being connected to valve between described five-way and four-way after a solenoid valve and valve near four-way place;
Shell is provided with outward:
Can the constant temperature oven of design temperature, be provided with the testing jig that adjusting cylinders E2, temperature sensor I, SF6 or mixed gas air reservoir D2 and is installed density monitor to be measured in constant temperature oven; This testing jig has a threeway, and described SF6 or mixed gas air reservoir D2 are communicated with mounting bracket and lead to the 4th interface of the five-way in shell, and the adjusting cylinders in described constant temperature oven is connected to the 5th interface of described five-way by a solenoid valve and valve; Described each solenoid valve is by computer control system control linkage;
One group of cylinder, comprises and can be the SF6 cylinder of density monitor make-up gas to be measured and the cylinder of mixed gas, and two cylinders connect the third and fourth interface of described four-way each via a solenoid valve;
The each solenoid valve of described controller control linkage.
Described one multi-functional SF6 and SF6 mixed gas density monitor calibration equipment, described mixed gas is nitrogen or carbon tetrafluoride gas.
The computer data processing system of calibration equipment of the present invention, by controller, valve, solenoid valve, can utilize SF 6mixed gas is to SF 6mixed gas density monitor carries out high/low temperature temperature compensation test, arranges various temperature by high/low temperature constant temperature oven, in the high/low temperature constant temperature oven of set temperature, can well regulate SF by adjusting cylinders 6mixed gas density, to SF 6mixed gas density monitor carries out temperature compensation test, can to SF 6mixed gas density monitor test product carries out the performance test of ratings, contact working value; Again, pure SF can be utilized 6gas is to SF 6gas density relay carries out high/low temperature temperature compensation test, arranges various temperature by high/low temperature constant temperature oven, in the high/low temperature constant temperature oven of set temperature, can well regulate SF by adjusting cylinders 6gas density, to SF 6gas density relay carries out temperature compensation test, can to SF 6gas density relay test product carries out the performance test of ratings, contact working value; Again, software compensation mensuration can also be adopted SF 6mixed gas density monitor carries out high/low temperature temperature compensation test, arranges various temperature by high/low temperature constant temperature oven, in the high/low temperature constant temperature oven of set temperature, can well regulate SF by adjusting cylinders 6gaseous tension, utilizes software compensation mensuration to SF 6mixed gas density monitor carries out temperature compensation test, can to SF 6mixed gas density monitor test product carries out the performance test of ratings, contact working value; Again, software compensation mensuration can also be adopted SF 6gas density relay carries out high/low temperature temperature compensation test, arranges various temperature by high/low temperature constant temperature oven, in the high/low temperature constant temperature oven of set temperature, can well regulate SF by adjusting cylinders 6gaseous tension, utilizes software compensation mensuration to SF 6gas density relay carries out temperature compensation test, can to SF 6gas density relay test product carries out the performance test of ratings, contact working value.There is SF simultaneously 6mixed gas gas charging system, can to SF 6mixed gas density monitor test product fills the SF of corresponding proportion 6mixed gas; There is pure SF 6gas inflated system, can to SF 6gas density relay test product fills the pure SF of corresponding density 6gas.And can test contacts working value, rreturn value automatically, and can deposit data automatically, report is provided.
Multi-functional SF of the present invention 6and mixed gas density monitor calibration equipment, the SF of various measuring principle can be verified accurately at total temperature 6gas density relay, can accurately verify SF again simultaneously 6mixed gas density monitor.Meanwhile, software compensation mensuration can be utilized to verify the SF of various measuring principle at total temperature 6gas and SF 6the SF of mixed gas density monitor 6gas density relay calibration equipment, meets engineer applied and efficient demand.
Accompanying drawing explanation
Fig. 1 is the multi-functional SF of the present invention 6and the structural representation of mixed gas density monitor calibration equipment;
Fig. 2 is the multi-functional SF of the present invention 6and the complete schematic of mixed gas density monitor calibration equipment;
Fig. 3 is the multi-functional SF of the present invention 6and the SF of mixed gas density monitor calibration equipment 6the schematic diagram of mixed gas compensation measuring method;
Fig. 4 is the multi-functional SF of the present invention 6and the SF of mixed gas density monitor calibration equipment 6the schematic diagram of gas compensation mensuration;
Fig. 5 is the multi-functional SF of the present invention 6and the schematic diagram of the software compensation mensuration of mixed gas density monitor calibration equipment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below by embodiment to the multi-functional SF of one of the present invention 6and mixed gas density monitor calibration equipment is further described.See Fig. 1 and Fig. 2, Multifunctional checking device of the present invention comprises two SF6 or mixed gas air reservoir D1 50, D2 2, two adjusting cylinders E1 48, E2 1, an absolute pressure transducer H 12, a relative pressure sensor G 13, a temperature sensor I 10, constant temperature oven 8, density monitor testing jig 4, valve B1 49, valve B2 33, valve B3 46, valve B4 35, valve B5 39, valve B6, valve B7 3, solenoid valve A1 21, solenoid valve A2 24, solenoid valve A3 33, solenoid valve A4 47, solenoid valve A5 41, vacuum pump F 29, SF 6gas cylinder C1 28, N2 or CF4 gas cylinder C2 27, housing 18, four-way connection 19, five-way joint 37, some connection tracheaes 4,9,20,22,23,25,26,30,32,34,35,38,40,42,43,44,45, contact connecting line 6, computer data processing system 15, controller 14, operation keyboard 17 and a display 16.Wherein constant temperature oven 8, for providing high temperature constant temperature or cryogenic thermostat to case build-in test environment; Measured relay erecting frame 4, is arranged in constant temperature oven 8, for installing tested SF 6gas or or hybrid density relay 7; Temperature sensor 10, is arranged in constant temperature oven 8, for the temperature data of detection case build-in test environment; SF 6or its mixed gas air reservoir D2 2, be arranged in constant temperature oven 8, when high temperature constant temperature or cryogenic thermostat, for carrying the pure SF be for experiment 6gas or SF 6mixed gas; Adjusting cylinders E2 1, is arranged in constant temperature oven 8, when high temperature constant temperature or cryogenic thermostat, for regulating pure SF 6gas or SF 6the pressure (density) of mixed gas; Measured relay contact, is arranged in warm constant temperature oven 8, is connected by contact connecting line 6 with computer data processing system 15; Valve B7 3, is arranged in constant temperature oven 8, at the end of verification, closes SF 6or its mixed gas air reservoir D2 2, prevent gas from leaking outside, to use again next time.
Absolute pressure transducer H 12, relative pressure sensor G 13, valve B2 33, valve B4 35, valve B5 39, solenoid valve A1 21, solenoid valve A2 24, solenoid valve A3 33, solenoid valve A5 41, vacuum pump F 29, four-way connection 19, five-way joint 37, computer data processing system 15, controller 14, operation keyboard 17 and display screen 16 are arranged on the housing 18 of calibration equipment.
SF 6or its mixed gas air reservoir D2 is provided with valve B7 3, valve B7 3 is connected with density monitor testing jig 4 by connecting tracheae 4, and density monitor testing jig 4 is connected with five-way joint 37 by connecting tracheae 9, SF tested in addition 6gas or or hybrid density relay 7 be arranged on density monitor testing jig 4; Adjusting cylinders E2 1 is connected with solenoid valve 41 by connecting tracheae 42, and solenoid valve 41 is connected with valve B5 39 by connecting tracheae 40 again, and valve B5 39 is connected with five-way joint 37 by connecting tracheae 38; Absolute pressure transducer H is connected with valve B6 11 by connecting tracheae 44, and for detecting the vacuum tightness of absolute pressure data and system, valve B6 11 is connected with five-way joint 37 by connecting tracheae 43; Relative pressure sensor G 13, is connected with five-way joint 37, for detecting relative pressure data by connecting tracheae 45; Five-way joint 37 is connected with valve B4 35 by connecting tracheae 36, and valve B4 35 is connected with four-way connection 19 by connecting tracheae 34 again; Four-way connection 19 is connected with solenoid valve A1 21 by connecting tracheae 20, and solenoid valve A1 21 is again by connecting tracheae 23 and SF 6gas cylinder C1 28 is connected; Four-way connection 19 is connected with solenoid valve A2 24 by connecting tracheae 22, and solenoid valve A2 24 is again by connecting tracheae 25 and N 2or CF 4gas cylinder C2 27 is connected; Four-way connection 19 is connected with valve B2 31 by connecting tracheae 30, and valve B2 31 is connected with solenoid valve A3 33 by connecting tracheae 32 again, and solenoid valve A3 33 is connected with vacuum pump F 29 by connecting tracheae 26 again; Computer data processing system 15, is connected, for data processing with temperature sensor 10, measured relay 7, absolute pressure transducer 12 and relative pressure sensor 13 respectively; Display 16, is connected with computer data processing system 15, for showing checking data; Operation keyboard 17, is connected with computer data processing system 15, for input operation data; Controller 14, is connected with computer data processing system 15, for operations such as Controlling solenoid valve.And SF 6gas cylinder C1 28 and N 2or CF 4gas cylinder C2 27 is for providing gas to measured relay 7.
In addition, valve B3 46 is connected with valve B4 35, be connected, and solenoid valve A4 47 is connected with adjusting cylinders E1 48 with solenoid valve A4 47, and adjusting cylinders E1 48 is connected with valve B1 49, and valve B1 49 is connected with gas air reservoir D1 50.
Embodiment one
By embodiment to the multi-functional SF of one of the present invention 6and mixed gas density monitor calibration equipment is further described.Shown in composition graphs 1, Fig. 2 and Fig. 3, use SF 6mixed gas is to SF 6mixed gas density monitor carries out high/low temperature temperature compensation test.The SF of the present embodiment 6the operation steps of gas density relay calibration equipment is as follows:
1) as tested with mixed gas, needing first according to the ratio of mixed gas, being converted into 20 DEG C of corresponding pressure
Ratio, then inflates gas circuit, is first filled with SF 6gas to corresponding pressure, and then is filled with N 2or CF 4, to corresponding force value;
2) close hand valve B3, namely this part need not (be mentioned solenoid valve below, hand valve do not comprise this under such configuration
Part); Gas cylinder and vacuum pump are connected with gas circuit, all solenoid valves and manually-operated gate original state are all closed condition;
3) tested density monitor to be installed on testing jig that (only need install one, all the other connectors are with special stifled
Head sealing), after installation, testing jig is put in high-low temperature test chamber, after gas circuit and circuit are connected, start high/low temperature and detect:
the ratings of mixed gas density monitor detects:
4) computer data processing system 15 is opened, choice for use SF 6mixed gas carries out high/low temperature temperature
Complementation test, first computer data processing system 15 can open solenoid valve A1, A2, A3, A5 automatically, and then manually-operated gate B2, B4, B5, B6, B7 are opened in prompting.Now gas circuit structure is as above shown in Fig. 3;
5), after opening above-mentioned valve, computer data processing system 15 opens vacuum pump F29 automatically,
Start to vacuumize to whole gas circuit, after reaching vacuum level requirements (vacuum tightness reads by absolute pressure transducer), computer data processing system 15 Self-shut electromagnetic valve A1, A2, A3, and vacuum pump, and manually-operated gate B2, B4 are closed in prompting;
6), after aforesaid operations completes, prepare to fill SF to gas circuit 6gas, now guarantees that gas cylinder coupling part finishes
Become, then give the instruction that computer data processing system 15 1 continues, now computer data processing system 15 opens solenoid valve A1 automatically, testing jig is filled with to the SF of relevant pressure 6gas, when gaseous tension reach inflation require time, the data that computer data processing system 15 gathers according to pressure transducer, Self-shut electromagnetic valve A1;
7), after aforesaid operations completes, prepare to fill N to gas circuit 2or CF 4gas, now guarantees that gas cylinder coupling part is accurate
After completing, artificial instruction of continuing to computer data processing system 15 1, now computer data processing system 15 opens solenoid valve A 2 automatically, testing jig is filled with to the N of relevant pressure 2or CF 4gas, when gaseous tension reach inflation require time, the data that computer data processing system 15 gathers according to pressure transducer, Self-shut electromagnetic valve A2, and prompting close manually-operated gate 1;
8) now high-low temperature test chamber is set to the temperature that will test, waits to arrive probe temperature, and equalized temperature
Afterwards (2h, can arbitrarily setup times length), regulate adjusting cylinders E2 1 by regulating wheel 1A, allow mixed gas density monitor pointer be indicated to ratings, then manual-lock valve B5, after guaranteeing gas circuit sealing, high/low temperature temperature is set to 20 DEG C;
9) until temperature return to 20 DEG C and balance after (2h), computer data processing system 15(manually sends out
Order or be as the criterion with the time of setting) (this pressure is density monitor 20 DEG C of pressure that ratings is corresponding at test temperature automatically to read now airline pressure from pressure transducer, i.e. nominal density value P20), then by data with the contrast of ratings error, it is qualified to carry out judging whether; If the precision of testing other points is similar, it is open mode that this process solenoid valve A5 and manually-operated gate B7 requires always.
contact value detects:
10), after having surveyed ratings, high-low temperature chamber temperature is returned to probe temperature again, after equalized temperature (2h),
Computer data processing system 15 prompting open manually-operated gate B5(now solenoid valve A5 open), continue to regulate adjusting cylinders E21, gaseous tension is slowly declined, when proximity sensing or locking contact, guarantees that the air pressure of gas circuit reduces with the variable quantity being less than 0.0005MPa as far as possible;
11) when after contact, automatically controlled by computer data processing system 15, immediately shut electromagnetic valve
A5, and send voice prompt, in order to ensure gas circuit sealing, computer data processing system 15 is pointed out simultaneously and is closed manually-operated gate A5, after guaranteeing gas circuit sealing, high/low temperature temperature is set to 20 DEG C;
12) until temperature return to 20 DEG C and balance after (2h), computer data processing system 15 passes from pressure
Sensor place reads now airline pressure, and (this pressure is density monitor contact value is corresponding at test temperature 20 DEG C of pressure, i.e. P 20), then by data with the contrast of contact value error, it is qualified to carry out judging whether;
13) need high-low temperature chamber temperature to return to probe temperature again after completing, and then carry out the detection of other contacts,
Process is the same;
14) note the control to solenoid valve A5, its Logic judgment is wanted accurately: will open when this is opened, want during this shutoff
Turn off immediately.
15) rreturn value is tested similar.
Embodiment two
The present embodiment is to the multi-functional SF of one of the present invention 6and mixed gas density monitor calibration equipment is further described.Shown in composition graphs 1, Fig. 2 and Fig. 4, use SF 6gas is to SF 6gas density relay carries out high/low temperature temperature compensation test.The SF of the present embodiment 6the operation steps of gas density relay calibration equipment is as follows:
1) shut electromagnetic valve A2, hand valve B3, namely this part (need not mention solenoid valve, hand under such configuration below
Valve does not comprise this part); Gas cylinder and vacuum pump are connected with gas circuit, all solenoid valves and manually-operated gate original state are all closed condition;
2) tested density monitor to be installed on testing jig that (only need install one, all the other connectors are with special stifled
Head sealing), after installation, testing jig is put in high-low temperature test chamber, after gas circuit and circuit are connected, start high/low temperature and detect:
ratings detects:
3) computer data processing system 15 is opened, choice for use SF 6gas carries out high/low temperature temperature compensation
Test, first computer data processing system 15 can open solenoid valve A1, A3, A5 automatically, and then manually-operated gate B2, B4, B5, B6, B7 are opened in prompting.(now gas circuit structure is as above shown in Fig. 4);
4) after opening above-mentioned valve, computer data processing system 15 opens vacuum pump automatically, to whole gas
Road starts to vacuumize, after reaching vacuum level requirements (vacuum tightness reads by absolute pressure transducer), and computer data processing system 15 Self-shut electromagnetic valve A1, A3, A5, and vacuum pump, and manually-operated gate B2, B6 are closed in prompting;
5), after aforesaid operations completes, prepare to fill SF to gas circuit 6gas, now guarantees that gas cylinder coupling part finishes
Become, then give the instruction that computer data processing system 15 1 continues, now computer data processing system 15 opens solenoid valve A1 automatically, testing jig is filled with to the SF of rated pressure 6gas, when gaseous tension reach inflation require time, the data that computer data processing system 15 gathers according to pressure transducer, Self-shut electromagnetic valve A1, and manually-operated gate B4 is closed in prompting;
6) now high-low temperature test chamber is set to probe temperature, waits to arrive probe temperature, and after equalized temperature (2h,
Can setup times length arbitrarily), regulate adjusting cylinders E2, allow density monitor pointer be indicated to ratings, then manual-lock valve B5, after guaranteeing gas circuit sealing, high/low temperature temperature is set to 20 DEG C;
7) until temperature return to 20 DEG C and balance after 2h, computer data processing system 15(manually sends out
Order or be as the criterion with the time of setting) (this pressure is density monitor 20 DEG C of pressure that ratings is corresponding at test temperature automatically to read now airline pressure from pressure transducer, i.e. P20), then by data with the contrast of ratings error, it is qualified to carry out judging whether; If the precision of testing other points is similar, it is open mode that this process solenoid valve A5 and manually-operated gate B7 requires always.
contact value detects:
8) after having surveyed ratings, by the probe temperature that high-low temperature chamber temperature is recovered again, after equalized temperature (2h), computer data processing system 15 prompting open manually-operated gate B5(now solenoid valve A5 open), continue to regulate adjusting cylinders, gaseous tension is slowly declined, when proximity sensing or locking contact, guarantees that the air pressure of gas circuit reduces with the variable quantity being less than 0.0005MPa as far as possible;
9) when after contact, automatically controlled by computer data processing system 15, shut electromagnetic valve A5 immediately, and send voice prompt, seal in order to ensure gas circuit, computer data processing system 15 is pointed out simultaneously and is closed manually-operated gate B5, after guaranteeing gas circuit sealing, high/low temperature temperature is set to 20 DEG C;
10) until temperature return to 20 DEG C and balance after (2h), computer data processing system 15 reads now airline pressure from pressure transducer, and (this pressure is density monitor 20 DEG C of pressure that contact value is corresponding at test temperature, i.e. P20), then by data with the contrast of contact value error, it is qualified to carry out judging whether;
11) need high-low temperature chamber temperature to return to probe temperature again after completing, and then carry out the detection of other contacts, process is the same;
12) note the control to solenoid valve A5, its Logic judgment is wanted accurately: will open when this is opened, will turn off immediately during this shutoff.
13) rreturn value is tested similar.
Embodiment three
By embodiment to the multi-functional SF of one of the present invention 6gas density relay calibration equipment is further described.Shown in composition graphs 1, Fig. 2 and Fig. 5, use software measurement method to SF 6gas density relay verifies.Its ultimate principle is: adopt advanced industrial computer technology (computer data processing system 15), temperature control system and totally-enclosed SF 6gaseous tension regulating system, selects the intellectual pressure transducer G of good digital, temperature sensor I.Calibration equipment sample simultaneously tested density monitor action time gaseous tension and temperature value to industrial computer, utilize SF 6the mathematical model of relation between gaseous tension and temperature, adopt the method that software compensation is measured, the calculation process through industrial computer obtains SF 6the density value of gas.Concrete process is, according to SF 6gas density curvilinear equation solves, and this equation is:
In formula:
P---pressure, ' 0.1MPa;
D---density, kg/m 3;
T---temperature, K.
P is absolute pressure, and unit is .Utilize above-mentioned relation formula, after measurement obtains temperature and pressure value, utilize Pierre to block red equations, the unique solution of density d can be obtained, and reference pressure value when being automatically converted into 20 DEG C, thus complete the dynamic auto compensation of pressure, temperature, complete SF 6the qualification of gas density relay.The schematic diagram of software compensation mensuration is shown in Fig. 5.
Software compensation mensuration is simple to operate, to totally-enclosed SF 6the seal request of gaseous tension regulating system is not high, and the whole check test time is short, but owing to utilizing SF 6between gaseous tension and temperature, the mathematical model of relation converts, and its accuracy is not very high, is difficult to meet the high occasion of measuring requirement, but can meet engineering verification requirement.The SF of the present embodiment 6the operation steps of gas density relay calibration equipment is as follows:
1) shut electromagnetic valve A1, hand valve B2, B5, B7, namely this part need not (mention solenoid valve, hand valve do not comprise this part) below under this measuring method;
2) connected with gas circuit by gas cylinder C2, all solenoid valves (A2, A4) and manually-operated gate (B1, B3, B4, B6) original state are all closed condition
3) tested density monitor is installed on testing jig and (4 density monitors can be installed simultaneously), after installation, testing jig is put in high/low temperature Homothermal Proof Box, after gas circuit and circuit are connected, start high/low temperature and detect:
ratings detects:
4) open industrial computer, choice for use software compensation mensuration carries out high/low temperature temperature compensation test;
5) industrial computer opens solenoid valve A2, A4 automatically, and manually-operated gate B1, B3, B4 are opened in prompting, and after completing, industrial computer can point out the gas (air or the N that testing jig are filled with to rated pressure 2), when gaseous tension reach inflation require time, the data that industrial computer gathers according to pressure transducer, Self-shut electromagnetic valve A2, A4, then industrial computer reresents closedown manually-operated gate B1, constant temperature oven is set to probe temperature, arrive design temperature and balance (2h) after, now gas circuit structure is as above shown in Fig. 2;
6) industrial computer opens solenoid valve A4 automatically, by regulating adjusting cylinders E1, allows the pointer of density monitor be indicated to its dial plate ratings (if gaseous tension is inadequate, can opens manually-operated gate B1 and carry out tonifying Qi) respectively;
7) now artificially industrial computer instruction is given, (these data are this density monitor gaseous tension at such a temperature to allow industrial computer automatically gather and record the test data of pressure transducer, i.e. Pt), the data of this collection are converted to the force value (i.e. P20) of 20 DEG C by industrial computer, ratings error again with this density monitor contrasts, and it is qualified to carry out judging whether.
contact value detects:
8) after having surveyed ratings, continue to regulate adjusting cylinders, gaseous tension is slowly declined, when proximity sensing or locking contact, guarantee that the air pressure of gas circuit reduces with the variable quantity being less than 0.0005MPa p.s. as far as possible;
9) when after contact, industrial computer can record the pressure data (Pt) that now pressure transducer gathers automatically, and these data are passed through SF 6the reduction formula of gaseous tension different temperatures, is converted to SF by the pressure (Pt) at this temperature 6force value (P20) at corresponding 20 DEG C of gas, then the contact value error of these data with density monitor contrasted, it is qualified to carry out judging whether.
The multi-functional SF of the embodiment of the present invention 6and the technological innovation of the calibration equipment of mixed gas density monitor is: (1) is by setting up density monitor testing jig, connecting tracheae, constant temperature oven, controller, solenoid valve, SF 6or mixed gas air reservoir, adjusting cylinders, absolute pressure transducer, relative pressure sensor, temperature sensor, valve, vacuum pump F, SF 6gas cylinder, N2 or CF4 gas cylinder, computer data processing system, realize in multi-functional full operating temperature range SF 6and SF 6mixed gas density monitor verifies, particularly under limit low temperature or the condition of high temperature to SF 6gas and SF 6mixed gas density monitor verifies.(2) there is SF easily 6mixed gas gas charging system, can to SF 6mixed gas density monitor test product fills the SF of corresponding proportion 6mixed gas; (3) there is pure SF easily 6gas inflated system, can to SF 6gas density relay test product fills the pure SF of corresponding density 6gas; (4) energy test contacts working value, rreturn value automatically, and energy deposit data automatically, provide report; (5) its maximum innovative point or core innovative point are: adopt actual pure SF 6gas or SF 6mixed gas detects, and overcomes traditional SF 6gas density relay checking instrument is owing to adopting SF 6the error that the pressure-temperature characteristic mathematics relationship model of gas is carried out data processing and existed, maximum improves checking precision; There is again software compensation mensuration simultaneously, can test the SF of various measuring principle at total temperature 6gas and SF 6mixed gas density monitor, meets the demand that engineer applied tests various density monitor, can raise the efficiency simultaneously.This calibration equipment is a kind of multi-functional SF 6and the calibration equipment of mixed gas density monitor.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (2)

1. a multifunctional gas density monitor calibration equipment, is characterized in that, it comprises: the shell of calibration equipment, is provided with in shell:
A set of computer control system with keyboard and display, input connects relative pressure sensor and the absolute pressure transducer of computer control system control, relative pressure sensor is connected to the first interface of a five-way, absolute pressure transducer is connected to the second interface of this five-way by a valve, 3rd interface of this five-way connects a four-way by a valve, and this four-way second interface connects one by a valve, solenoid valve and establishes vacuum pump in the enclosure;
An air reservoir, it by after valve in parallel adjusting cylinders successively by being connected to valve between described five-way and four-way after a solenoid valve and valve near four-way place;
Shell is provided with outward:
Can the constant temperature oven of design temperature, be provided with adjusting cylinders E2, temperature sensor I, SF in constant temperature oven 6or the testing jig of a mixed gas air reservoir D2 and installation density monitor to be measured; This testing jig has a threeway, described SF 6or mixed gas air reservoir D2 is communicated with mounting bracket and leads to the 4th interface of the five-way in shell, the adjusting cylinders in described constant temperature oven is connected to the 5th interface of described five-way by a solenoid valve and valve; Described each solenoid valve is by computer control system control linkage;
One group of cylinder, comprises the SF that can be density monitor make-up gas to be measured 6the cylinder of cylinder and mixed gas, two cylinders connect the third and fourth interface of described four-way each via a solenoid valve;
The each solenoid valve of described controller control linkage.
2. a kind of multi-functional SF as claimed in claim 1 6and SF 6mixed gas density monitor calibration equipment, is characterized in that: described mixed gas is nitrogen or carbon tetrafluoride gas.
CN201310641562.XA 2013-12-04 2013-12-04 Multifunctional gas density relay calibration device Pending CN104698371A (en)

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CN110412461A (en) * 2019-09-04 2019-11-05 上海乐研电气有限公司 Transmitter and system for automatic on-line verification density monitor
CN110426314A (en) * 2019-09-04 2019-11-08 上海乐研电气有限公司 On-line sampling check-up gas density electrical relay with defencive function
CN110426628A (en) * 2019-09-04 2019-11-08 上海乐研电气有限公司 Transmitter and system for on-line testing gas density relay
CN110441194A (en) * 2019-09-04 2019-11-12 上海乐研电气有限公司 A kind of gas density relay of self-test contact contact resistance
CN110491724A (en) * 2019-09-04 2019-11-22 上海乐研电气有限公司 A kind of teletransmission gas density relay system and its method of calibration
CN110542853A (en) * 2019-09-04 2019-12-06 上海乐研电气有限公司 Gas density relay with online self-checking function and checking method thereof
CN110954652A (en) * 2019-10-28 2020-04-03 国网河北省电力有限公司电力科学研究院 Verification device and verification method
CN111463063A (en) * 2019-09-04 2020-07-28 上海乐研电气有限公司 Maintenance-free gas density relay
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EP4027469A4 (en) * 2019-09-04 2023-09-13 Shanghai Roye Electric Co., Ltd. Electrical system with on-line sampling verification function and verification method thereof
EP4027129A4 (en) * 2019-09-04 2023-10-04 Shanghai Roye Electric Co., Ltd. Field detection device, system and method for achieving no maintenance of gas density relay
EP4027155A4 (en) * 2019-09-04 2023-10-11 Shanghai Roye Electric Co., Ltd. Transformation method for gas density relay, and gas density relay having online self-check function and check method thereof
EP4027152A4 (en) * 2019-09-04 2023-10-11 Shanghai Roye Electric Co., Ltd. Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor

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CN107677957A (en) * 2017-10-26 2018-02-09 云南省送变电工程公司 Portable density table contact tester
CN107677957B (en) * 2017-10-26 2024-01-30 云南省送变电工程公司 Portable density meter contact calibrator
CN108107355A (en) * 2017-12-20 2018-06-01 国网河北省电力有限公司电力科学研究院 A kind of SF6And SF6Mixed gas density monitor calibration equipment and method
CN108107355B (en) * 2017-12-20 2020-10-02 国网河北省电力有限公司电力科学研究院 SF (sulfur hexafluoride)6And SF6Device and method for checking mixed gas density relay
CN110441194A (en) * 2019-09-04 2019-11-12 上海乐研电气有限公司 A kind of gas density relay of self-test contact contact resistance
CN111463063B (en) * 2019-09-04 2021-08-10 上海乐研电气有限公司 Maintenance-free gas density relay
CN110491724A (en) * 2019-09-04 2019-11-22 上海乐研电气有限公司 A kind of teletransmission gas density relay system and its method of calibration
CN110542853A (en) * 2019-09-04 2019-12-06 上海乐研电气有限公司 Gas density relay with online self-checking function and checking method thereof
US11988714B2 (en) 2019-09-04 2024-05-21 Shanghai Roye Electric Co., Ltd. Gas density relay verification device and verification method therefor
CN111463063A (en) * 2019-09-04 2020-07-28 上海乐研电气有限公司 Maintenance-free gas density relay
CN110426314A (en) * 2019-09-04 2019-11-08 上海乐研电气有限公司 On-line sampling check-up gas density electrical relay with defencive function
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
WO2021043040A1 (en) * 2019-09-04 2021-03-11 上海乐研电气有限公司 Electrical system with on-line sampling verification function and verification method thereof
CN110426628A (en) * 2019-09-04 2019-11-08 上海乐研电气有限公司 Transmitter and system for on-line testing gas density relay
EP4027469A4 (en) * 2019-09-04 2023-09-13 Shanghai Roye Electric Co., Ltd. Electrical system with on-line sampling verification function and verification method thereof
EP4027366A4 (en) * 2019-09-04 2023-09-27 Shanghai Roye Electric Co., Ltd. Maintenance-free gas density relay and cross-checking method therefor
EP4027129A4 (en) * 2019-09-04 2023-10-04 Shanghai Roye Electric Co., Ltd. Field detection device, system and method for achieving no maintenance of gas density relay
EP4027154A4 (en) * 2019-09-04 2023-10-04 Shanghai Roye Electric Co., Ltd. Electrical system with on-line sampling verification function and verification method thereof
EP4027155A4 (en) * 2019-09-04 2023-10-11 Shanghai Roye Electric Co., Ltd. Transformation method for gas density relay, and gas density relay having online self-check function and check method thereof
EP4027152A4 (en) * 2019-09-04 2023-10-11 Shanghai Roye Electric Co., Ltd. Method for modifying gas density relay, and gas density relay having online self-checking function and checking method therefor
EP4027153A4 (en) * 2019-09-04 2023-10-11 Shanghai Roye Electric Co., Ltd. Gas density relay verification device and verification method therefor
CN110412461A (en) * 2019-09-04 2019-11-05 上海乐研电气有限公司 Transmitter and system for automatic on-line verification density monitor
CN110954652A (en) * 2019-10-28 2020-04-03 国网河北省电力有限公司电力科学研究院 Verification device and verification method

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