CN103033350B - Accelerated failure experimental method for gas pressure regulator and experimental device thereof - Google Patents
Accelerated failure experimental method for gas pressure regulator and experimental device thereof Download PDFInfo
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- CN103033350B CN103033350B CN201210496927.XA CN201210496927A CN103033350B CN 103033350 B CN103033350 B CN 103033350B CN 201210496927 A CN201210496927 A CN 201210496927A CN 103033350 B CN103033350 B CN 103033350B
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Abstract
The invention provides an accelerated failure experimental method for a gas pressure regulator and an experimental device used by the experimental method. Through the method of monitoring pressure change of experimental medium on a side of an outlet of the measured gas pressure regulator placed in an environment with preset temperature, the measured gas pressure regulator is driven to carry out start and stop motion according to a control mode until the set experiment number is achieved or the measured gas pressure fails, so the experiment aim of measuring to accelerate failure of the measured gas pressure regulator is achieved. The control mode has two kinds: one kind is that the start and stop of the measured gas pressure regulator are controlled according to preset and fixed time intervals, and the other kind is that the start and the stop of the measured gas pressure regulator are controlled with the requirements of maximum experimental pressure and the minimum experimental pressure are met. The accelerated failure experimental method for the gas pressure regulator and the experimental device used by the experimental method can be based on the number of fixed cycling and reciprocating experiments to compare weakening of static indexes of characteristics of the gas pressure regulator, and can also be based on set index limits to compare the number of fixed cycling and reciprocating experiments. According to experimental data and relevant researches, assessment on operational reliability and life prediction of the gas pressure regulator can be achieved.
Description
Technical field:
The invention belongs to gas field, relate to a kind of gas pressure regulator, governor and accelerate inefficacy experiment device and experimental technique used.
Background technology:
Gas Pressure Regulating Equipment is the critical network maincenter in fuel gas supply system, is the important node equipment that control city transmission and distribution network air feed safety, regulator failure consequence compared with buried pipe network local damage accident cause disastrous larger.For this reason, people, except strengthening maintaining, more very pay close attention to the safe reliability forecasting research of product facility, and life forecast is one of focus paid close attention to.
So-called life prediction is the research by making equipment accelerate test method and the Correlation Theory lost efficacy, and to time or the expection of losing efficacy of equipment safety operation, gives comparatively clear and definite judgement.Current, China still belongs to technological gap in gas pressure regulator, governor life prediction, although define some test methods in all kinds of relevant criterion of product, for judging the long-time running reliability of product, but the correlativity of its experimental data and actual motion is too poor, all be not enough to the life prediction foundation becoming Gas Regulator complete machine, cannot quantizating index be realized.
Prior art present situation related to the present invention is:
1) endurancing.This test method is carried out at normal temperatures, gas pressure regulator, governor is driven to carry out the action back and forth opened and closed with pressurized air as actuating medium, test is stopped after carrying out certain number of times according to standard, static characteristic index relatively before and after gas pressure regulator, governor experiment, when change then assert that in tolerance band the endurance quality of this gas pressure regulator, governor is qualified.The technological deficiency of this test is: examine the mechanical drive reliability that the topworks of gas pressure regulator, governor runs at normal temperatures, but is not enough to characterize gas pressure regulator, governor in different gas medium and the actual motion reliability under difference extreme running temperature.There is certain correlativity and contact in engineering practice also this experimental data of sufficient proof and actual motion, but poor as the experimental basis degree of correlation of life prediction.
2) resistance to combustion gas test.This test method is carried out at normal temperatures, and the epithelium test piece choosing gas pressure regulator, governor to be immersed in the test(ing) medium solvent of regulation some hours, the weight and volume rate of change then before and after comparative experiments, when rate of change regulation more among a small circle in regard as qualified.The technological deficiency of this test is: this test has carried out static resistance to gas medium corrosion accelerated aging test with the weak element of gas pressure regulator, governor security of operation, but be not enough to characterize this non-metallic component under the stress shape bearing operating pressure operating mode with the actual motion reliability under difference extreme running temperature, more cannot characterize the operational reliability of Gas Regulator complete machine.Engineering practice proves, this test method also also exists obvious flaw, Here it is by the new product of same batch products and used old product after a while to carry out resistance to combustion gas test comparison, the used test piece of result more can meet standard regulation compared with the weight and volume rate of change of new product, indicates the weight rate tested with resistance to combustion gas and the volume change data unreliability as life prediction further.
3) air oven aging test.Non-metallic component test specimen in Gas Regulator is placed in constant temperature oven by this test, leave standstill under the hot-air environment of different temperatures after some hours respectively and take out, the pulling strengrth of test specimen or the change of compression deformation index before and after comparative experiments, the method is the technical method of the analysis rubber material ages performance that extensively adopts of industry and bimetry.Before the more than ten years, we carried out experiment and prediction according to the method to the rubber seal performance of gas-fired equipment and serviceable life, but practice shows that this method and practical effect still exist larger gap.Major defect is that the rubber seal of gas-fired equipment not runs under the aerobic environment of such as test, and therefore the thermo-oxidative ageing feature of rubber is not enough to the aging decay characteristic characterizing gas-fired equipment.Certainly, overheated media ages test method is also proposed in related industrial standards, but its defect is still: the corrosion-resistant ageing properties of static state that only can characterize gas-fired equipment non-metallic component material, still be not enough to the Q-percentile life of this part under operating condition is described, the serviceable life of more impossible explanation integral device safe and reliable operation.
Raising along with industry science and technology level and the raising to security precautions, scientific and technical personnel, from accident aftertreatment, accident diagnosis to accident early warning, life prediction future development, are becoming the focus of industry based on the accelerated deterioration of real state Dynamic simulation, the forecasting technique in life span of acceleration inefficacy experiment.
Summary of the invention:
Object of the present invention is just the active demand of complying with industry development in science and technology, overcome above-mentioned the deficiencies in the prior art, and provide a kind of gas pressure regulator, governor to accelerate inefficacy experiment device and experimental technique used, the method and device are based on the thought of real state Dynamic simulation, the test methods such as the accelerated deterioration of integrated operation environment, mechanical long duration test, gas medium corrosion accelerated deterioration, carry out durability experiment to gas pressure regulator, governor complete machine, being embodied as life prediction provides the target of more pressing close to produce actual technical parameter.
As above conceive, technical scheme of the present invention is: a kind of gas pressure regulator, governor accelerates inefficacy experiment device, it is characterized in that: comprise constant temperature oven, recycle compressor, import and export buffering gas tank, experiment gas medium gas is filled with, import and export solenoid valve, import and export throttling valve, tested gas pressure regulator, governor top hole pressure transmitter and Programmable Logic Controller; Tested gas pressure regulator, governor is placed in constant temperature oven, the entrance experiment pipeline of recycle compressor is connected with the outlet of tested gas pressure regulator, governor, the outlet experiment pipeline of recycle compressor is connected with the import of tested gas pressure regulator, governor, makes the outlet of tested gas pressure regulator, governor and recycle compressor test pipeline and forms airtight test pipe system; Experiment pipeline in the entry and exit of recycle compressor is installed import and export buffering gas tank respectively, import and export solenoid valve and import and export throttling valve; The entrance experiment pipeline of recycle compressor is communicated with experiment gas medium gas tank, the outlet experiment pipeline of recycle compressor is communicated with tested gas pressure regulator, governor top hole pressure transmitter; Programmable Logic Controller respectively with power supply, recycle compressor, recycle compressor entry and exit experiment pipeline on import and export solenoid valve be connected with tested gas pressure regulator, governor top hole pressure transmitter.
Above-mentioned gas pressure regulator, governor accelerates inefficacy experiment device experimental technique used, it is characterized in that: tested gas pressure regulator, governor is placed on gas pressure regulator, governor and accelerates in the constant temperature oven of inefficacy experiment device, going out of tested gas pressure regulator, governor and recycle compressor, entrance experiment pipeline connects, form airtight test pipe system, injection experiments gas medium in airtight test pipe system, by Programmable Logic Controller by the test routine preset, recycle compressor is driven to run and enter, outlet solenoid valve replaces start-stop, the pressure change in Control release loop, make tested gas pressure regulator, governor preset temperature environment and experiment gas medium condition under, carry out the action back and forth opened and closed, until reach test number (TN) or the inefficacy of setting, thus realize the test objective that the tested gas pressure regulator, governor of test accelerates inefficacy.
The entry and exit experiment pipeline of above-mentioned recycle compressor all connects the outlet of tested gas pressure regulator, governor, makes the outlet of tested gas pressure regulator, governor and recycle compressor test pipeline and forms airtight test pipe system; The import blind plate sealing of tested gas pressure regulator, governor.
The lift of above-mentioned recycle compressor should be not less than maximum experimental pressure, and discharge capacity should be not less than the circulating flow rate meeting and realize pressure change surge requirements.
Principle of work of the present invention is: by the way of tested gas pressure regulator, governor at high-low-temperature environmental testing, the impact of strengthening environment; By the method adopting experiment to run with gas medium, strengthening corrosion impact; By the method for continuous reciprocal switching motion, the tired impact of strengthening, thus realization is simulated the actual operating state of gas pressure regulator, governor and is strengthened adverse condition, reaches the basic experiment target accelerated gas pressure regulator, governor and lost efficacy.
The present invention has following advantage and good effect:
Have employed and comprise gas pressure regulator, governor complete machine acceleration inefficacy experimental technique and the device that mechanical endurance test, resistance to combustion gas test, air oven aging test, thermal medium aging test etc. accelerate defeat technique thought, the degree of correlation of the actual motion effect of experimental data and equipment is higher.Compared with the mechanical endurance test of routine, this method enhances the influence factor of gas medium corrosion and environment temperature; Compared with testing with the hot air aging of routine, this method enhances the influence factor of whole machine experiment and gas medium and operating pressure; Test to test with resistance to combustion gas with thermal medium and compare, this method remains equipment is communicated with side oxygen aging and fuel gas flow influence factor with air, enhances the influence factor of dynamic load.
Foundation the technology of the present invention method and the experimental data completed at experimental provision, directly as the evaluation index of the durability of gas pressure regulator, governor equipment, can also can be used as the basic data of life forecast.
Based on the experimental data that the technology of the present invention method and experimental provision complete, the durability evaluation of the Gas Regulator carried out and life prediction, higher with the degree of correlation of equipment operational reliability in engineering reality, be greatly better than existing technology.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of experimental provision of the present invention.
The tested gas pressure regulator, governor of 1-, 2-constant temperature oven, 3-recycle compressor, 4-Programmable Logic Controller, 5-import and export buffering gas tank, 6-working power, 7-test gas medium gas tank, 8-test gas medium inlet, 9-import and export solenoid valve, 10-imports and exports throttling valve, 11-pressure regulator top hole pressure transmitter, 12-experimental system pipeline.
Embodiment:
Annexation composition experimental provision by shown in Fig. 1: recycle compressor 3 imported and exported buffering gas tank 5, test gas medium gas tank 7, test gas medium inlet 8, import and export solenoid valve 9, import and export the parts metal experimental system pipeline 12 such as throttling valve 10, pressure regulator top hole pressure transmitter 11 and connect; By import and export solenoid valve 9, pressure regulator top hole pressure transmitter 11, recycle compressor 3 and the control circuit of constant temperature oven 2 and the connection of Programmable Logic Controller 4; Working power 6 and Programmable Logic Controller 4 and recycle compressor 3, constant temperature oven 2 are connected.
According to the closing presure grade and the precision of voltage regulation parameter that complete the tested gas pressure regulator, governor 1 that static characteristic is tested, determine the controling parameters that experimental provision of the present invention runs and by the control model of testing requirements choice experiment plant running, namely complete building and Preparatory work of experiment of experimental provision.
This experimental provision can run different test gas mediums, test gas medium is determined by the expection actual motion combustion gas of tested gas pressure regulator, governor or the stronger test gas of corrosive medium, and reference test gas is business methane, business isobutane, plant hydrogen.
Above-mentioned gas pressure regulator, governor is utilized to accelerate inefficacy experimental provision experimental technique used:
Specific experiment scheme 1:
1) tested gas pressure regulator, governor 1 is fixed in constant temperature oven 2;
2) by tested gas pressure regulator, governor import blind plate sealing, with metal hose, the outlet of tested gas pressure regulator, governor is connected with the import and export of the experimental system pipeline 12 of experimental provision simultaneously;
3) with vacuum pump, test pipe system is vacuumized, and check impermeability;
4) airtight test qualified after, open test gas medium gas tank 7, by test with gas medium inlet 8 to injection test medium in pilot system, when system pressure reaches maximum experimental pressure, close the valve of test gas medium inlet 8, stop inflation.
5) start constant temperature oven 2 to run, test temperature temperature being reached pre-set also stablizes a period of time;
6) ON cycle compressor, start Programmable Logic Controller 4, import and export solenoid valve 9 is all in opening;
7) the top hole pressure change of tested gas pressure regulator, governor is monitored by pressure unit 11, by alternately opening and closing the mode operation importing and exporting solenoid valve 9 when monitoring pressure is in minimum and maximum setting value respectively;
8) regulating import and export throttling valve 10, the frequency imported and exported solenoid valve 9 and alternately open and close can being changed, for controlling the cycle of whole experiment;
9) experimental provision can record the number of times imported and exported solenoid valve 9 and open and close automatically, until reach predetermined total degree, experimental provision stops experiment automatically.
10), in experimentation, when occurring that monitoring pressure is abnormal, system also can stop test automatically;
11) take out tested gas pressure regulator, governor, re-start static characteristic test, and record data.
Specific experiment scheme 2:
1) tested gas pressure regulator, governor 1 is fixed in constant temperature oven 2;
2) tested gas pressure regulator, governor import and export to be imported and exported with the experimental system pipeline 12 of experimental provision with metal hose be connected respectively;
3) with vacuum pump, test pipe system is vacuumized, and check impermeability;
4) airtight test qualified after, open test gas medium gas tank 7, by test with gas medium inlet 8 to injection test medium in pilot system, when system pressure reaches the closing presure of tested gas pressure regulator, governor 1, close the valve of test gas medium inlet 8, stop inflation.
5) start constant temperature oven 2 to run, test temperature temperature being reached pre-set also stablizes a period of time;
6) ON cycle compressor, starts Programmable Logic Controller 4, imports and exports solenoid valve 9 and is all in opening;
7) mode operation importing and exporting solenoid valve 9 is is alternately opened and closed by Fixed Time Interval;
8) the top hole pressure change of tested gas pressure regulator, governor is monitored by pressure unit 11;
9) regulate import and export throttling valve 10, the top hole pressure constant interval of tested gas pressure regulator, governor can be changed;
10) experimental provision can record the number of times imported and exported solenoid valve 9 and open and close automatically, until reach predetermined total degree, experimental provision stops experiment automatically;
11) in experimentation, experimental provision automatically can be monitored and be recorded each change value of pressure opened and closed, and when monitoring pressure occurs abnormal, system also can stop test automatically;
12) take out tested gas pressure regulator, governor, re-start static characteristic test, and record data.
This experimental technique can be based on fixed cycles Cyclic test number of times, compares the decay of the static characteristic index of gas pressure regulator, governor, also can be based on setting index boundary, comparison loop Cyclic test number of times; According to the correlation research accelerating failure test data and actual motion effect, the technical Analysis that operational reliability and the life prediction of gas pressure regulator, governor are judged can be realized.
The present invention has carried out analog reconstruction to the actual condition of gas pressure regulator, governor to greatest extent, in the theoretical foundation respecting fully existing mechanical fatigue test, accelerated aging test, media-resistant corrosion test, have developed and more press close to produce actual acceleration failure test method and experimental provision.The present invention significantly can reduce gas-fired equipment life prediction and produce actual deviation, has very great meaning to the development of lifting China gas-fired equipment Prevention-Security, accident early warning technology.
Claims (4)
1. gas pressure regulator, governor accelerates an inefficacy experiment device, it is characterized in that: comprise constant temperature oven, recycle compressor, import and export buffering gas tank, experiment gas medium gas is filled with, import and export solenoid valve, import and export throttling valve, tested gas pressure regulator, governor top hole pressure transmitter and Programmable Logic Controller; Tested gas pressure regulator, governor is placed in constant temperature oven, the entrance experiment pipeline of recycle compressor is connected with the outlet of tested gas pressure regulator, governor, the outlet experiment pipeline of recycle compressor is connected with the import of tested gas pressure regulator, governor, makes the outlet of tested gas pressure regulator, governor and recycle compressor test pipeline and forms airtight test pipe system; Experiment pipeline in the entry and exit of recycle compressor is installed import and export buffering gas tank respectively, import and export solenoid valve and import and export throttling valve; The entrance experiment pipeline of recycle compressor is communicated with experiment gas medium gas tank, the outlet experiment pipeline of recycle compressor is communicated with tested gas pressure regulator, governor top hole pressure transmitter; Programmable Logic Controller respectively with power supply, recycle compressor, recycle compressor entry and exit experiment pipeline on import and export solenoid valve be connected with tested gas pressure regulator, governor top hole pressure transmitter.
2. a gas pressure regulator, governor according to claim 1 accelerates inefficacy experiment device experimental technique used, it is characterized in that: tested gas pressure regulator, governor is placed on gas pressure regulator, governor and accelerates in the constant temperature oven of inefficacy experiment device, going out of tested gas pressure regulator, governor and recycle compressor, entrance experiment pipeline connects, form airtight test pipe system, injection experiments gas medium in airtight test pipe system, by Programmable Logic Controller by the test routine preset, recycle compressor is driven to run and enter, outlet solenoid valve replaces start-stop, the pressure change in Control release loop, make tested gas pressure regulator, governor preset temperature environment and experiment gas medium condition under, carry out the action back and forth opened and closed, until reach test number (TN) or the inefficacy of setting, thus realize the test objective that the tested gas pressure regulator, governor of test accelerates inefficacy.
3. gas pressure regulator, governor according to claim 1 accelerates inefficacy experiment device, it is characterized in that: the entry and exit experiment pipeline of above-mentioned recycle compressor all connects the outlet of tested gas pressure regulator, governor, makes the outlet of tested gas pressure regulator, governor and recycle compressor test pipeline and forms airtight test pipe system; The import blind plate sealing of tested gas pressure regulator, governor.
4. gas pressure regulator, governor according to claim 1 accelerates inefficacy experiment device, it is characterized in that: the lift of above-mentioned recycle compressor should be not less than maximum experimental pressure, and discharge capacity should be not less than the circulating flow rate meeting and realize pressure change surge requirements.
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| CN103487781B (en) * | 2013-09-09 | 2016-03-23 | 国家电网公司 | A kind of reliability estimation method of the electronic mutual inductor based on accelerated deterioration |
| CN106707797A (en) * | 2015-07-28 | 2017-05-24 | 大丰市丰泰机电有限公司 | Intelligent safe energy-saving monitoring system for gas pressure regulating station |
| CN107367432A (en) * | 2017-08-09 | 2017-11-21 | 广州特种承压设备检测研究院 | The ageing test apparatus and life-span prediction method of PE pipelines under a kind of surge pressure |
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