CN2087342U - Automatic sample-injecting device for insulating oil chromatographic analysis - Google Patents

Abstract

The utility model belongs to a device for detecting the safe situation of a power supplying equipment, comprising a degassing device, a vacuum pump, a quantitative system, air-intake systems and an electromagnetic valve controlling system. A degassing chamber inside the degassing device is arranged in a heating layer and a heat insulating layer, the inner part of the degassing chamber is provided with a stirring block, the lower side of the degassing chamber is provided with a rotating wheel connected to an electric motor, and the inlet of the bottom of the degassing chamber is arranged along the tangential direction of the degassing chamber. The quantitative system is connected to the inlet and is composed of an air storage barrel, a pin valve and an electromagnetic valve. The air-intake systems comprises two sets which are respectively composed of a combined electromagnetic valve and an air storage barrel, and the electromagnetic valve having switching action is arranged between two sets of air-intake systems.

Description

Automatic sample-injecting device for insulating oil chromatographic analysis

The utility model belongs to a kind of device that detects the power-supply unit safety case.

When detecting the latency fault of electric equipment inside, often become to assign to be judged by dissolved gases in the oil of vapor-phase chromatography detection in equipment.In this method, the dissolved gas that how to take out effectively in the oil is one of key that influences testing result.At present, degas method commonly used has multiple, wherein, more common a kind of diaphragm type degasser is as shown in Figure 1: it has one by the synthetic sphere degassing ball 1 of two hemisphere, between two hemisphere, there is the film ball one that will outgas to be divided into two, on the episphere of degassing ball, connect air drum 8 by needle-valve V8 respectively, solenoid valve V3 connects gas injection port 6, solenoid valve V1 and vacuum meter 2 connect lower semisphere, on lower semisphere, connect vacuum pump 3 by solenoid valve V2 respectively, solenoid valve V4 is connected demand chamber 7 with V7, the ball 4 of between solenoid valve V4 and V7, calming the anger, demand chamber 7 also links to each other with vacuum pump 3 by solenoid valve V6, gas injection port 6 is connected with oil sample bottle 5 by solenoid valve V5, and simultaneously, gas injection port 6 also is connected with demand chamber 7.

During operation, open solenoid valve V1, V2, V8 earlier, make the upper and lower hemisphere of gas burette 8, degassing ball 1 all be in vacuum state, the film in the degassing ball is posted on the lower semisphere inside surface under deadweight.Open solenoid valve V5 simultaneously, rotate gas injection port 6, make the oil sample in the oil sample bottle 5 fill with demand chamber 7.Shut-off valve V1, V5, V8 open valve V3, close V3 again after making oil samples in the demand chamber 7 enter the episphere of degassing ball 1, are dissolved with oil sample bubbing in being in the degassing ball of negative pressure state of gas, press the new balance of Henry's law generation.Close V2 then, open V4, the utilization ball 4 of calming the anger makes air enter the lower semisphere of degas chamber 1, by means of film the oil sample gas in the episphere is sent into gas burette 8 through V8, make the ball 2 of calming the anger, the upper and lower hemisphere of degas chamber, gas burette all is in the atmospheric equilibrium state, reads the gas volume number of gas burette then, with syringe the gas in the gas burette is taken out, through injector a certain amount of oil sample gas injecting chromatograph is analyzed again.

The characteristics of this degasser are, the gas that is dissolved in the oil is transferred to gas phase, make gas phase return to normal pressure through film again, and in the rejuvenation, component gas can be got back in the oil again, thereby the gas of deviating from obviously reduces, and often are starkly lower than theoretical degassing rate.Gas return molten also and in the oil dissolved gases content warm relevant with oil, low more time of content is molten many more, so degassing rate instability extremely, analytical error is very big.Secondly, whenever do and once analyze all and need enter in degas chamber, the degas chamber gas collection in the degassing, the gas graduated cylinder, get gas and air inlet five steps such as to the instrument with syringe through oil sample, each link all can cause operate miss, so analysis result shortage comparability.In addition, each operation needs 2 people.

The purpose of this utility model is a kind of degassing precision height of design, easy to operate dielectric oil chromatographic analysis automatic sampler.

The degas chamber 18 that is characterized in degasser has heating layer 19 and heat-insulation layer 20 outward, the piece 21 of stirring is arranged in the bottom of degas chamber 18, there is the runner 22 that is installed on the motor 23 below, runner is magnetic, the stirring piece is a magnetic material, when runner rotates, under magneticaction, drive and stir piece 21 rotations, oil sample in the degas chamber is stirred, the import 24 of degas chamber bottom enters along the degas chamber tangential direction, and the proportioning device of oil sample gas is installed in the import 24 of degas chamber, is made up of needle-valve 19, air drum DL3 and solenoid valve V20.Gas handling system has two groups, is respectively combination solenoid valve 17, air drum DL1 and the combination solenoid valve 14 that is made of V22～V24, the air drum DL2 that are made of solenoid valve V25～V27.

The utility model has the advantages that: the gas that vacuum is deviate from makes gas phase recover normal pressure by special carrier gas current stabilization layer, simultaneously, carrier gas stream exchanges with the component gas that remains in the oil again through oil reservoir, and component gas is brought into gas phase, together be compressed in the quantity tube, eliminated the Hui Rong of gas fully, and can further divide survival gas, therefore by the carrier gas band, degassing rate is apparently higher than theoretical value, and analysis precision is higher.Secondly, gas handling system be control automatically, is connected two cover air inlet systems of degas chamber outlet, and by the automatic control of carrier gas and solenoid valve, the gas direct sending chromatograph that can will deviate from proper order need not be through manually getting process such as gas.

Fig. 1 is original injector structure figure.

Fig. 2 is injector structure figure of the present utility model.It is Figure of abstract.

As shown in Figure 2: heating layer 19 and heat-insulation layer 20 are arranged outside the degas chamber 18, in the degas chamber bottom piece 21 of stirring is arranged, the runner 22 that is connected on the motor 23 is being arranged below the degas chamber 18, and runner 22 is magnetic, stirring piece 21 is magnetic material, degas chamber is a nonmagnetic substance, when motor rotates, stirs piece and can rotate with runner.The import 24 of degas chamber bottom tangentially is provided with, in import, connect the gas admittance valve V13 of oil-feed sample solenoid valve V10, quantitative system and vacuumize and draining valve V11, on solenoid valve V10, connect oil-feed sample mouth 25, solenoid valve V11 connects fuel reserve tank 11, vacuum meter 13 and solenoid valve V12 and vacuum pump 12 are arranged on the top of fuel reserve tank 11, the bottom has draining valve V14 and row to take out mouth 10, connects the air inlet quantitative system that is made of needle-valve V19, tensimeter P3, air drum DL3 and solenoid valve V20 on solenoid valve V13.Exit on degas chamber 18 tops, connect two groups of gas handling systems by solenoid valve V9, wherein one group of combination solenoid valve 14 that is made of solenoid valve V22～V24 is formed with air drum DL2, connection traffic meter 15, tensimeter P2 and flow stabilizing valve V18 between solenoid valve V24 and V23, be connected chromatograph injection port Gc2 between V22 and the V23, meet V9 between V24 and the DL2.Another group is made up of with air drum DL1 the combination solenoid valve 17 that solenoid valve V25～27 constitute, at V27～V26 inferential flow meter 16, tensimeter P1 and flow stabilizing valve V15, between V26 and V25, meet chromatograph injection port GC1, between V25 and DL1, link to each other with the solenoid valve V9 of degas chamber outlet by the solenoid valve V21 that plays the conversion effect.Flow stabilizing valve V15, V18 all link to each other with carrier gas (N2) import by pressure maintaining valve V16.Between carrier gas inlet and solenoid valve V20, pressure maintaining valve V17 is arranged.

During work, in oil sample import 25, connect earlier the oil sample syringe of 50～100ml, open solenoid valve V12, V11, V9 and V21, start vacuum pump 12, make fuel reserve tank 11, degas chamber 18 and air drum DL1～2 be in negative pressure state, simultaneously, open pressure maintaining valve V17, V20, the carrier gas (N2) with certain pressure is entered in the air drum DL3 of quantitative system.Close solenoid valve V20 and V12, V11, V9, V21 then, open V10, treat to close V10 again after a certain amount of oil sample enters in the degas chamber 18, actuating motor 23, under the drive of runner 22, stir oil sample, separate out with the gas in the oil sample that impels and accelerate to be in negative pressure state, make gas-liquid reach new balance by Henry's law.Then, cut off the power supply of motor 23, open solenoid valve V13, V9 and needle-valve V19, make a certain amount of carrier gas enter in the oil reservoir of degas chamber bottom by import 24, rise with the laminar flow shape again, the oil sample gas on degas chamber top is sent into air drum DL2 quantitatively, when DL2 is filled, solenoid valve V21 automaticallyes switch, and makes oil sample gas be full of air drum DL1 quantitatively again.Then, close solenoid valve V9, V13, open solenoid valve V11, make the oil sample in the degas chamber be back to oil drum 11, close V11 after backflow finishes through import 24, open solenoid valve V10 again, advance a little oil sample to be checked and go into degas chamber, close V10 again after degas chamber is cleaned, and open V12, V11, start vacuum pump 12, again degas chamber is vacuumized.Simultaneously, close solenoid valve V23, open solenoid valve V24, V22, make the oil sample gas in the air drum enter the chromatograph analysis under carrier gas promotes, analysis finishes, and opens V23, close V24, V22, simultaneously, close V26, open V27, V25, oil sample gas in the air drum DL1 enters the chromatograph analysis, analysis finishes, and closes V27, V25 again, opens V26.At this moment, finish the degasification process of second batch of oil sample in the degas chamber, therefore, can carry out quantitatively air inlet and the analysis second time again.

In the heating layer 19 electro-heat equipment is arranged among Fig. 2, be under the stationary temperature to guarantee degas chamber, fuel reserve tank 11 is used to store the oil sample that took off gas in the degas chamber, when amassing to a certain degree, opens solenoid valve V14 oil extraction.Needle-valve V19 is used to regulate carrier gas in the quantitative system intake velocity in entering degas chamber the time, if it is too fast, can make oil sample chaotic Phenomena occur, influence enters the quality of the oil sample gas in air drum DL1～2, thereby the impact analysis precision is too slow, influences detection time again, after preferably carrier gas enters degas chamber along import 24 with tangential direction, can be with the rising (constitute carrier gas current stabilization layer) of spiraling of laminar flow shape.Pressure maintaining valve V16, flow stabilizing valve V18, V15 when opening chromatograph, just should open, and be in conducting state always, to guarantee having gas to enter all the time in the chromatograph.

Claims (3)

1, a kind of dielectric oil chromatographic analysis injector, by degasser, vacuum pump 12, quantitative system, gas handling system, solenoid valve system are formed, the degas chamber 16 that it is characterized in that degasser has heating layer 19 and heat-insulation layer 20 outward, in degas chamber, be magnetic and stir piece 21, the magnetic runner 22 that is connected on the motor 23 is arranged below the degas chamber, and the import 24 of degas chamber bottom is along the tangential direction of degas chamber.

2, injector according to claim 1, the quantitative system that it is characterized in that being connected in the import 24 is made up of air drum DL3, needle-valve 19, solenoid valve 20.

3, injector according to claim 1, it is characterized in that gas handling system has two groups, be respectively combination solenoid valve 17, air drum DL1 and the combination solenoid valve 14 that constitutes by solenoid valve V22～24, the air drum DL2 that constitute by solenoid valve V25～27, solenoid valve V21 is arranged between two groups of gas handling systems.

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