CN107544412A - A kind of control circuit of oil chromatography experiment automatic sampling apparatus - Google Patents
A kind of control circuit of oil chromatography experiment automatic sampling apparatus Download PDFInfo
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- CN107544412A CN107544412A CN201710815304.7A CN201710815304A CN107544412A CN 107544412 A CN107544412 A CN 107544412A CN 201710815304 A CN201710815304 A CN 201710815304A CN 107544412 A CN107544412 A CN 107544412A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of control circuit of oil chromatography experiment automatic sampling apparatus, described control circuit provides DC supply by an AC-DC converter for PLC and single-chip microcomputer, on/off is carried out using working power switch QF1, vaccum pump motor is connected by controlling switch KM with circuit, utilize the control relay lead-out terminal of singlechip controller, control pressure controller and sensing trigger controller, control relay lead-out terminal also controls magnetic valve with gas storage respectively, pressurized control magnetic valve, sample introduction control magnetic valve, vavuum pump, vacuumize magnetic valve, alarm is electrically connected.The control circuit of the oil chromatography experiment automatic sampling apparatus of the present invention, it is possible to achieve oil chromatography is tested into tested gas sample and is automatically injected chromatographic operating function.The artificial sample introduction operational error of oil chromatography can at utmost be avoided by the application of the present apparatus, effectively reduce the error of oil chromatography experiment, improve oil chromatography test accuracy, avoid that erroneous judgement occurs.
Description
Technical field
It is particularly a kind of suitable for the exhausted of electric insulation oil gas phase chromatography test the present invention relates to a kind of automatic sampling apparatus
Edge oil chromatography tests the control circuit of automatic sampling apparatus.
Background technology
In recent years, oil-filled electric equipment internal fault property is judged by oil chromatography experiment, has become and ensure oil-filled electricity
Gas equipment important means safe for operation.And in oil chromatography experiment work, the tested gas sample deviate from from insulating oil is injected
Chromatographic operation link, it is directly connected to the accuracy of oil chromatography result of the test.
Conventional oil chromatography test injection gas sample mode of operation be：Tested gas sample is first pumped into 5mL's by testing crew
In gas sample syringe, then with a 1mL glass syringes insertion gas sample syringe with syringe needle, extract 1mL and be tested
Gas sample.Again by the chromatographic injection port of syringe needle quick insertion, by artificial quick pushing syringe fuse by tested gas
Detected in sample injection instrument.The operation of injection gas sample is required to the speed of injection every time, gas sample volume must be consistent, no
Great detection error will then be caused.
The accuracy that this mode of operation tests oil chromatography relies on testing crew personal sensation and reaction speed completely,
This body harmony to testing crew, operational stability, operating experience propose high requirement.Testing crew is in each gas
All necessary spiritual high concentration, such as slightly neglects, syringe needle easily occurs and be bent, fuse is by chromatogram in sample injection process
Bear down on one before post phenomena such as winged, injection rate is inconsistent, gas sample is surprisingly lost in.Because artificial sample introduction operational error rate is high, seriously
Oil chromatography test accuracy is influenceed, easily causes the erroneous judgement to oil-filled equipment running situation.The content of the invention
The development purpose of the present apparatus is that changing current gas-chromatography experimental labor injects the high work of gas sample operational error rate
Mode, and offer is a kind of easy to use, may be implemented in auto injection implant operation device general on various oil colours spectrometers
Control circuit.
A kind of control circuit of oil chromatography experiment automatic sampling apparatus, described control circuit are turned by a power of alterating and direct current
Parallel operation provides DC supply for PLC and single-chip microcomputer, and on/off, vaccum pump motor are carried out using working power switch QF1
It is connected by controlling switch KM with circuit, utilizes the control relay lead-out terminal of singlechip controller, control pressure controller
And sensing trigger controller, control relay lead-out terminal also control magnetic valve, pressurized control magnetic valve, sample introduction with gas storage respectively
Control magnetic valve, vavuum pump, vacuumize magnetic valve, alarm is electrically connected, realization device logic control, connect work electricity
Source switch QF1 will start PLC, and PLC enters " sample introduction preparation " state, and it connects control relay 1J, opens gas storage
Control magnetic valve is filled with high pressure carrier gas into high-pressure boost cylinder, and subsequent PLC connects control relay 5J, 6J, and opening vacuumizes
Magnetic valve simultaneously starts vavuum pump gas sample room is vacuumized, and PLC disconnects control relay 5J, 6J after arrival time, vacuumizes electromagnetism
Valve cut-out vacuumizes gas circuit, and vavuum pump is shut down, alarm for opening prompting sample introduction, and after sample vent plug arrival pressure side is noted, it will sense
The infrared signal for answering the infrared transmitter of trigger controller to project blocks, and photoreceiver is lost infrared light supply, so as to
Trigger device sample introduction signal, controller PLC connect control relay 3J, 4J, while open the sample introduction control electricity of gas sample room front end
The pressurized control magnetic valve at the gentle specimen chamber rear portion of magnet valve, the high pressure carrier gas of high-pressure boost cylinder interior are fast released, discharged
Under the promotion of pressure, the note sample vent plug in gas sample room is promoted by high pressure draught quickly to be moved right, so as to being tested its front end
Gas sample is rapidly pushed into injection port of chromatograph connector 3, when nebulizer gas pressure discharges and is less than certain value in high-pressure boost cylinder
When, pressure controller starts, and disconnects control relay 3J, 4J by PLC, by pressurized control magnetic valve, sample introduction control magnetic valve certainly
Dynamic involution, cut-out note sample gas circuit, PLC are again switched on control relay 5J, 6J, and opening vacuumizes magnetic valve and starts vavuum pump pair
Gas sample room is vacuumized, and subsequent control relay 1J is connected, and is opened gas storage control magnetic valve and is filled with into high-pressure boost cylinder
2.0Mpa high pressure carrier gas, prepare for sample introduction next time.
The control circuit of described oil chromatography experiment automatic sampling apparatus also includes touch control screen, touch control screen with
Control relay lead-out terminal is connected.
In summary, the present invention has the following advantages compared with prior art：
The control circuit of the oil chromatography experiment automatic sampling apparatus of the present invention, it is possible to achieve it is automatic that oil chromatography is tested into tested gas sample
The operating function of injecting chromatograph.The artificial sample introduction operational error of oil chromatography can at utmost be avoided by the application of the present apparatus,
The error of oil chromatography experiment is effectively reduced, improves oil chromatography test accuracy, avoids that erroneous judgement occurs.The present apparatus can also advise simultaneously
The operating process of model oil chromatography experiment, reduce the operation difficulty of oil chromatography experiment.Note sample vent plug and photoelectricity the triggering control of the present apparatus
Meter is set up, its service speed is consistent substantially with artificial sample introduction, ensures that the tested gas sample volume of injection is also basically identical, subtracts
Sexual deviation is reappeared caused by few sample introduction.And the present apparatus using vacuum method efficiently solve different sample carryovers interfere, it is dirty
The problem of dye.The present apparatus is easy to install, does not change original operating process, and not carrying out any destructiveness to oil colours spectrometer changes
Make, do not change oil colours spectrometer performance, you can realization is general on various oil colours spectrometers, is very suitable for trying in electric power oil chromatography
Test middle use.
Brief description of the drawings
Fig. 1 is oil chromatography experiment auto injection operation device workflow schematic diagram.
Fig. 2 is gas sample cell structure schematic diagram.
Fig. 3 is oil chromatography experiment auto injection operation device control drawing.
Fig. 4 is that oil chromatography experiment auto injection operation device uses schematic diagram.
The air-flow voltage stabilizing of 3 gas circuit connecting leg of the pressure-reducing valve 2 of 1 sample introduction carrier gas steel cylinder of label declaration 101 work carrier gas steel cylinder 4
The photoelectricity triggering control of 8 pressurized control magnetic valve of the gas storage of device 5 control magnetic valve 6 pressure controller, 7 high-pressure boost cylinder 9
The sample introduction of 10 gas sample room of device 901 infrared transmitter, 902 photoreceiver, 101 11 gas injection port of note sample vent plug 12 controls electromagnetism
The chromatograph 15 of 13 injection port of chromatograph connector of valve 14 vacuumizes the gas sample syringe 18 of 16 minipump of magnetic valve 17
Setup Controller.
Embodiment
The present invention is described in more detail with reference to embodiment 1.
Embodiment 1
A kind of oil chromatography experiment auto injection operation device as shown in Figure 1, Figure 2, Figure 4 shows, including sample introduction carrier gas steel cylinder 1, gas circuit
Connecting leg 3, air-flow voltage-stablizer 4, gas storage control magnetic valve 5, pressure controller 6, high-pressure boost cylinder 7, pressurized control magnetic valve 8,
Photoelectricity trigger controller 9, gas sample room 10, gas injection port 11, sample introduction control magnetic valve 12, injection port of chromatograph connector 13, take out it is true
Empty magnetic valve 15, minipump 16, Setup Controller 18.
One carrier gas steel cylinder 1 for being exclusively used in sample introduction is controlled by pressure-reducing valve 101, gas circuit connecting leg 3, air-flow voltage-stablizer 4, gas storage
Magnetic valve 5 is connected with the air inlet of high-pressure boost cylinder 7, the pressurized control magnetic valve 8 in the gas outlet of high-pressure boost cylinder 7 and gas sample room
10 connections, the gas outlet of gas sample room 10 is connected to the sample introduction of chromatograph 14 through sample introduction control magnetic valve 12, injection port of chromatograph connector 13
Mouthful, the evacuated magnetic valve 15 of a minipump 16 is connected with gas sample room 10.
Described gas sample room 10 is a diameter 8mm, length 50mm inner wall smooths, the stainless steel cylinder of horizontal installing, and it can
The effective gas sample volume accommodated is about 1mL.Cylinder side is cone, with gas circuit connecting leg 3 and pressurized control magnetic valve and high pressure
Boosting cylinder connects.Opposite side is then a plane, and planar central has a gas outlet and sample introduction control magnetic valve, injection port of chromatograph
Connector and the connection of chromatographic injection port.The evacuated magnetic valve of one minipump is connected in the middle part of gas sample room.In gas sample
Room is provided with a gas injection port 11 with silica gel plug by plane side gas circuit connecting leg 3, by being also equipped with a light on conical side outer wall
Electric trigger controller 9.There is a note sample vent plug 1001 in gas sample chamber interior.
Described note sample vent plug is about 6mm for one, the hollow plastic-steel cylinder of black that diameter is about 6.5mm, is placed on gas
In specimen chamber, it can be promoted and move left and right by gas sample and boosting carrier gas stream, it is mainly used in triggering sample introduction signal and by tested gas sample
It is pushed into chromatograph sample introduction gas circuit.Cylindrical member at one end is cone, and the other end is the plane with small oblique angle, and it can be in gas sample room
Inside moved left and right.The tested gas sample that it is injected into during sample introduction promotes and moves to gas sample room cone pressure side to the left, when it
Because it blocks photoelectricity trigger controller light source when reaching the side, trigger device controller opens pressurized control magnetic valve and sample introduction
Control magnetic valve.So that high pressure carrier gas in high-pressure gas cylinder by abrupt release, sprays from gas sample room cone pressure side and promoted
Air-flow, it is set quickly to be pushed into gas sample room plane side to the right.The tested gas sample in front is quickly pushed into color by it in moving process
In the injector of spectrometer, so as to complete auto injection.Then because gas sample room is evacuated, its again can by next tested gas sample from
Gas sample room planar side is pushed into gas sample room conical sides triggering sample introduction signal and sample introduction.
Described high-pressure boost cylinder is the cylindrical shape rustless steel container that a volume is 0.5L, its side and gas storage control electricity
Magnet valve is connected, and side is connected with pressurized control magnetic valve, and being used to monitor nebulizer gas pressure in cylinder equipped with pressure controller thereon changes.
It is mainly used in the high pressure carrier gas for storing sample introduction, provides sample introduction thrust for note sample vent plug, and carry out gas punching to gas sample room
Wash.
Described photoelectricity trigger controller 9 is made up of miniature an infrared transmitter 901 and photoreceiver 902, its phase
To on the conical pressure side outer wall in gas sample room 10, being mainly used in triggering auto injection signal.When infrared light is not blocked,
Device does not start, when tested gas sample will note sample vent plug shift gas sample room cone pressure side onto when, its infrared light be completely blocked and
Send auto injection signal.
Described minipump uses direct current 24V miniature diaphragm vacuum air pumps, is mainly used in quickly discharging in gas sample room
Remaining gas, eliminate mutual pollution and interference between each tested gas sample.Its speed of exhaust >=2.0L/min, end vacuum
Spend residual voltage 90kpa.
Described gas circuit carries out each several part connection using diameter 3mm stainless steels tracheae.
Described magnetic valve is the miniature normally closed solenoid valve of DC24V coppers, maximum working pressure (MWP) 0.8Mpa, and switching time≤
0.04s, inside nominal diameter 3mm, it is mainly used in break-make gas circuit.
Described air-flow voltage-stablizer is the special resistance precision gas voltage regulator of gas chromatograph, its maximum working pressure (MWP)
0.8Mpa, voltage stabilized range 0-0.8 Mpa（It is adjustable）.For by the carrier gas stream voltage stabilizing that sample introduction carrier gas steel cylinder pressure-reducing valve exports to 2Mpa
With current stabilization to 100mL/min, to meet sample introduction requirement.
Using AVR single chip ATMEGA64 as core control element, it is mainly used in described PLC
The realization of each logic control program of device is carried out, completion vacuumizes timing controlled, the control of magnetic valve opening sequence, Stress control
Deng.
Described sample introduction carrier gas steel cylinder and work carrier gas steel cylinder is high pressure nitrogen（Argon gas）Bottle, gas purity 99.999%
, inside fills gas pressure 15Mpa.
Described alarm uses buzzer, is prompted for operating process.
Described touch control screen uses the very color touch control screens of 64K, for showing operation information and carrying out device operation
Control.
Described injection port of chromatograph connector is a stainless steel cylinder for being about 15mm.Cylinder both ends are interior spiral shell
Line, one end are connected with sample introduction control magnetic valve, and one end is connected with injection port of chromatograph.There is the latus rectum to be at its center
1.5mm air flue, air flue inlet and outlet have the conical projecting surface that an external diameter is 3mm, for being carried out with injection port of chromatograph
It is tightly connected.
Described device each several part is attached by gas circuit connecting leg 3.
The control circuit of oil chromatography experiment automatic sampling apparatus is as shown in Figure 3.
One 220V/24V AC-DC converter provides direct current 24V working powers for PLC and single-chip microcomputer, and it utilizes work
Make power switch QF1 and carry out on/off.The motor of minipump 16 is electrically connected by controlling switch KM with control loop.Utilize
Control relay lead-out terminal on AVR single chip ATMEGA64 controllers, gas storage pressure control and the photo-electric control of device are carried out,
Control relay lead-out terminal also controls with gas storage control valve 5, touch control screen, alarm, pressurization control valve 8, sample introduction respectively
Valve 12, minipump 16 are controlled, vacuum pumping valve 15 is electrically connected, realization device logic control function.
In use, screwing out the injection port rubber cushion lid of chromatograph 14, the present apparatus is arranged on injection port of chromatograph connector 13
On the injection port of chromatograph 14.Routinely mechanical oscillation degassing method is de-gassed to subject oil sample, and the tested gas sample of abjection is pumped into
In one 5mL glass gas samples syringe 17.The valve of sample introduction carrier gas steel cylinder 1 is opened, sample introduction carrier gas, output are exported by pressure-reducing valve 101
Carrier gas by 4 further voltage stabilizing of air-flow voltage-stablizer to 2.0Mpa.Working power switch QF1 is connected by the PLC of Setup Controller 18
Controller starts, and PLC enters " sample introduction preparation " state, and it connects control relay 1J, opens gas storage and controls magnetic valve 5 to height
2.0Mpa high pressure carrier gas is filled with pressure boosting cylinder 7.Subsequent PLC connects control relay 5J, 6J, and opening vacuumizes magnetic valve 15
And start minipump 16 and gas sample room 10 is vacuumized 5 seconds, PLC disconnects control relay 5J, 6J after the time reaches, and vacuumizes
The cut-out of magnetic valve 15 vacuumizes gas circuit, and minipump 16 is shut down, can be with sample introduction by the prompting of the alarm for opening of Setup Controller 18.
The 5mL gas samples syringe 17 for filling gas sample is inserted upwardly into the gas injection port 11 of device gas sample room 10 with a double-ended needle to connect
In silicagel pad, the tested gas sample of the certain volume in gas sample syringe 17 is rapidly injected in gas sample room 10.When tested gas sample is noted
After entering gas sample room 10, using the impetus for injecting air pressure, its by the note sample vent plug 1001 in the planar side of gas sample room 10 to the left
The quick pressure side for being pushed to the cone of gas sample room 10.After the arrival pressure side of sample vent plug 1001 is noted, photoelectricity is triggered and controlled by it
The infrared signal that the infrared transmitter 901 of device 9 projects blocks, and photoreceiver 902 is lost infrared light supply, so as to trigger
Device sample introduction signal.Now Setup Controller PLC connects control relay 3J, 4J, while opens the sample introduction of the front end of gas sample room 10
Control the pressurized control magnetic valve 8 at the gentle rear portion of specimen chamber 10 of magnetic valve 12.Now, the high pressure carrier gas inside high-pressure boost cylinder 7
It is fast released, under the promotion of release pressure, the note sample vent plug 1001 in gas sample room 10 is promoted quickly to the right by high pressure draught
Motion, so as to which the tested gas sample of its front end is rapidly pushed into injection port of chromatograph connector 13, then by work carrier gas steel cylinder 2
The work carrier gas of output, which is sent in chromatograph 14, to be analyzed, and completes the operating process of auto injection.Due to touching each time
Signalling position is all fixed, so as to ensure that the tested gas sample volume of each injecting chromatograph can be consistent.
When nebulizer gas pressure discharges and when being less than 1.0Mpa in high-pressure boost cylinder 7, pressure controller 6 starts, and is disconnected by PLC
Control relay 3J, 4J, by pressurized control magnetic valve 8, the automatic resetting of sample introduction control magnetic valve 12, cut-out note sample gas circuit.PLC is again
Secondary connection control relay 5J, 6J, opening vacuumizes magnetic valve 15 and starts minipump 16 vacuumizes 5 to gas sample room 10
Second, subsequent control relay 1J is connected, and opens gas storage control magnetic valve 5 and the high ballasts of 2.0Mpa are filled with into high-pressure boost cylinder 7
Gas, prepared for sample introduction next time.Above procedure is so repeated, the present apparatus is just completed and is automatically injected gas sample, the cleaning of gas sample room, enters
The standby operating process of calibration.
The not described part of the present embodiment is same as the prior art.
Claims (2)
- A kind of 1. control circuit of oil chromatography experiment automatic sampling apparatus, it is characterised in that：Described control circuit is by a friendship DC power converter provides DC supply for PLC and single-chip microcomputer, and on/off is carried out using working power switch QF1, Vaccum pump motor is connected by controlling switch KM with circuit, utilizes the control relay lead-out terminal of singlechip controller, control Pressure controller and sensing trigger controller, control relay lead-out terminal also control magnetic valve, pressurized control with gas storage respectively Magnetic valve, sample introduction control magnetic valve, vavuum pump, vacuumize magnetic valve, alarm is electrically connected, realization device logic control System, PLC will be started by connecting working power switch QF1, and PLC enters " sample introduction preparation " state, and it is by control relay 1J Connect, open gas storage control magnetic valve and be filled with high pressure carrier gas into high-pressure boost cylinder, subsequent PLC connect control relay 5J, 6J, opening vacuumize magnetic valve and start vavuum pump gas sample room is vacuumized, after arrival time PLC disconnect control relay 5J, 6J, vacuumize magnetic valve cut-out and vacuumize gas circuit, vavuum pump is shut down, alarm for opening prompting sample introduction, reach when note sample vent plug plus After pressing side, it blocks the infrared signal that the infrared transmitter for sensing trigger controller projects, and loses photoreceiver Infrared light supply, so as to trigger device sample introduction signal, controller PLC connects control relay 3J, 4J, while opens gas sample room front end The gentle specimen chamber rear portion of sample introduction control magnetic valve pressurized control magnetic valve, the high pressure carrier gas of high-pressure boost cylinder interior is quick Release, under the promotion of release pressure, note sample vent plug in gas sample room is promoted by high pressure draught and quickly moved right, thus by its The tested gas sample of front end is rapidly pushed into injection port of chromatograph connector 3, when nebulizer gas pressure discharges simultaneously in high-pressure boost cylinder During less than certain value, pressure controller starts, and control relay 3J, 4J is disconnected by PLC, by pressurized control magnetic valve, sample introduction control Magnetic valve automatic resetting processed, cut-out note sample gas circuit, PLC are again switched on control relay 5J, 6J, and opening vacuumizes magnetic valve and opened Dynamic vavuum pump is vacuumized to gas sample room, and subsequent control relay 1J is connected, and is opened gas storage and is controlled magnetic valve to high-pressure boost cylinder 2.0Mpa high pressure carrier gas is inside filled with, is prepared for sample introduction next time.
- 2. the control circuit of oil chromatography experiment automatic sampling apparatus according to claim 1, it is characterised in that：Described oil The control circuit of chromatography test automatic sampling apparatus also includes touch control screen, touch control screen and control relay output end Son is connected.
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| CN201710815304.7A CN107544412B (en) | 2017-09-12 | 2017-09-12 | Control circuit of automatic sample injection device for oil chromatography test |
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| CN201710815304.7A CN107544412B (en) | 2017-09-12 | 2017-09-12 | Control circuit of automatic sample injection device for oil chromatography test |
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