CN109580294A - A kind of oil storage tank oil sample acquisition system based on PLC control - Google Patents
A kind of oil storage tank oil sample acquisition system based on PLC control Download PDFInfo
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- CN109580294A CN109580294A CN201910001157.9A CN201910001157A CN109580294A CN 109580294 A CN109580294 A CN 109580294A CN 201910001157 A CN201910001157 A CN 201910001157A CN 109580294 A CN109580294 A CN 109580294A
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- 238000003860 storage Methods 0.000 title claims abstract description 48
- 238000005070 sampling Methods 0.000 claims abstract description 96
- 238000004891 communication Methods 0.000 claims abstract description 14
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- 230000005611 electricity Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
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- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 160
- 239000007788 liquid Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 16
- 239000007789 gas Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
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Abstract
The invention discloses a kind of oil storage tank oil sample acquisition systems based on PLC control comprising electric unit, machine assembly, gas circuit unit and oil circuit unit；Electric unit includes PLC controller, the servo-driver with PLC controller communication；Machine assembly includes the servo motor with servo-driver communication, the roller connecting with servo motor, the sampling pump connecting with roller, sampling pump connection oil storage tank；Gas circuit unit includes air compressor machine, the first solenoid valve connecting with air compressor machine, the sampling pump and scavenge oil pump connecting with the first solenoid valve；Oil circuit unit includes the second solenoid valve connecting with sampling pump, with the second solenoid valve sampling pool that wherein an outlet is connect by the first oil pipe；First oil pipe is equipped with flow sensor, and the current signal of flow sensor output inputs PLC controller, and another oil outlet of second solenoid valve connects a Residual oil pond by the second oil pipe, and Residual oil pond connects oil storage tank by a scavenge oil pump.
Description
Technical field
The present invention relates to belong to oil field oil storage tank oil sample acquisition field more particularly to a kind of oil storage tank based on PLC control
Oil sample acquisition system.
Background technique
Contain moisture in the adopted crude oil in oil field.If water content is more than regulation in oil liquid, economic loss and safety will cause
Accident.Therefore crude oil need to be carried out dehydrating.In order to monitor the treatment effect that oil storage tank is dehydrated crude oil, guarantee that oil storage tank is normal
Operation, under normal circumstances, employee on duty periodically must carry out overflow port sampling to crude oil of oil storage tank of oil, oil drilling water termination, visit emulsification
Thickness degree and detection oil temperature operation.Above-mentioned operation is completed by artificial upper tank operation at present.But artificial upper tank sampling process
Have the following defects and risk: after gauge hatch is opened, tank mouth and entire tank deck region diffuse the oil gas that crude oil volatilizes, ingredient
It is strong to the body of operating staff mainly comprising inducements methane, hydrogen sulfide, carbon monoxide and other hydrocarbon mixtures such as electrostatic sparks
Health is affected, and personnel's intoxication accident is easily caused when levels are big；Tank sampling large labor intensity is manually stepped on, upper and lower tank carries
Article is more, and employee samples the risk that tank process up and down has falling from high altitude, and the bad weathers such as strong wind, sleet can not go up tank sampling；
It is all the coarse method of counting to be knotted with one meter one of sampling rope that ruler, which is read currently used, under sampler, is estimated entirely in terms of reading
It reads, error is big, inaccurately.
Summary of the invention
The object of the invention is that solve the above-mentioned problems and provide it is a kind of based on PLC control oil storage tank oil sample adopt
Collecting system.Aim to solve the problem that personnel caused by vaporizing oil-gas are poisoned after opening when manually stepping on tank sampling now because of gauge hatch；Sample man
People falls from tank deck；Sampling operation is limited to big by weather；There are larger inaccuracy, oil sample is representative poor for manual measurement, reading
The problem of.
The present invention through the following technical solutions to achieve the above objectives:
The present invention includes electric unit, machine assembly, gas circuit unit and oil circuit unit；The electric unit includes PLC control
Device processed, the servo-driver with PLC controller communication；The contactor of PLC controller (1) the control each unit work,
Relay, the machine assembly include the servo motor with servo-driver communication, the rolling connecting with the servo motor
Cylinder, the sampling pump connecting with the roller, the sampling pump connect oil storage tank；The gas circuit unit includes air compressor machine, and described
First solenoid valve of air compressor machine connection, the sampling pump and scavenge oil pump being connect with first solenoid valve；The oil circuit unit includes
The second solenoid valve being connect with the sampling pump, with the second solenoid valve sampling that wherein an outlet is connect by the first oil pipe
Pond；First oil pipe is equipped with flow sensor, and the current signal of the flow sensor output inputs the PLC control
Device, another oil outlet of second solenoid valve connect a Residual oil pond by the second oil pipe, and the Residual oil pond is connected by a scavenge oil pump
Connect the oil storage tank.
Preferably, the control circuit further include to PLC controller input sample information touch screen and button open
It closes；The PLC controller realizes the control to each unit by each contactor, relay；The touch screen by Ethernet with
The PLC controller communication；The button switch is communicated by digital quantity form and the PLC controller.
Preferably, the output end of the servo motor connects a speed reducer, and the speed reducer connects the roller.
Preferably, for the speed reducer by roller described in transmission band connection, the roller includes roller part and roller conductor rope
Device, the output end of the roller part connect a roller rope guide, and the roller rope guide connects the sampling pump.
Preferably, the flow sensor connects the PLC controller by signal wire；The signal wire is using shielding
Line.
Preferably, the sampling pump is pneumatic diaphragm pump.
Preferably, first solenoid valve is two-bit triplet air valve.
Preferably, second solenoid valve is two-bit triplet oil valve.
The beneficial effects of the present invention are:
The present invention is a kind of oil storage tank oil sample acquisition system based on PLC control, and compared with prior art, the present invention has
Following advantage:
1, this system passes through the communication of PLC controller and each element, realizes the automation of oil storage tank oil sample collection process, keeps away
Exempt from manually to go up a series of dangerous present in tank operation and sampled inaccurate factor, has improved the reality of oil storage tank sample collection
Shi Xingyu reliability.
2, the operation of this system, which has, facilitates good man-machine interface, and user can preset motor speed, acquire
The position height of oil sample and oil liquid volume need to be acquired.Whole system has easy to operate, good reliability, at low cost, automation journey
The advantages that high is spent, a large amount of human and material resources and financial resources can be saved, obtains good economic benefit.
3, the system manually or automatically controls sampling pump and reaches the specified oil liquid volume of specified station acquisition,
And be not required to open the sample tap at the top of oil storage tank, the accompanying gas of tank inner fluid will not be discharged into atmosphere.
Detailed description of the invention
Fig. 1 is the oil storage tank oil sample acquisition system master-plan block diagram based on PLC controller control；
Fig. 2 is the functional block diagram of the main circuit of the electric unit of the invention；
Fig. 3 is the circuit diagram of the main circuit of the electric unit of the invention；
Fig. 4 is the schematic diagram of the control circuit of electric unit of the present invention；
Fig. 5 is the circuit diagram of the automatic control of electric unit of the present invention；
Fig. 6 is the circuit diagram that the present invention manually controls；
Fig. 7 is the schematic diagram of the transmission of machine assembly of the invention；
Fig. 8 is the schematic diagram of another angle of the transmission of machine assembly of the invention；
Fig. 9 is gas circuit unit schematic diagram of the invention；
Figure 10 is the structural block diagram of oil circuit unit；
Figure 11 is the sampling pump portion working principle diagram of this system；
Figure 12 is the structural schematic diagram of pneumatic diaphragm pump of the present invention.
In figure: 1-PLC controller；2- servo-driver；3- servo motor；4- roller rope guide；5- sampling pump；6- oil storage
Tank；7- air compressor machine；The first solenoid valve of 8-；9- second solenoid valve；10- sampling pool；11- flow sensor；12- Residual oil pond；13- is returned
Oil pump；14- touch screen；15- speed reducer；16- roller part；17- discharge pipe, 18- ball valve, 19- ball valve seat, 20- coupling bar, 21-
Distributing valve, 22- diaphragm, 23- feed pipe.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Fig. 1, the oil storage tank oil sample acquisition system based on PLC control in the embodiment of the present invention, including it is electrical single
Member, machine assembly, gas circuit unit and oil circuit unit；The electric unit includes PLC controller 1；It is logical with the PLC controller 1
The servo-driver 2 of news；The machine assembly includes the servo motor 3 with the servo-driver 2 communication；With the servo electricity
The roller that machine 3 connects；The sampling pump 5 being connect with the roller；The sampling pump 5 connects oil storage tank 6；The gas circuit unit includes
Air compressor machine 7；The first solenoid valve 8 being connect with the air compressor machine 7；The sampling pump 5 and scavenge oil pump being connect with first solenoid valve 8
13；The oil circuit unit includes the second solenoid valve 9 connecting with the sampling pump 5；With a second solenoid valve 9 wherein outlet
The sampling pool 10 connected by the first oil pipe；First oil pipe is equipped with flow sensor 11, and the flow sensor 11 is defeated
Current signal out inputs the PLC controller 1, and another oil outlet of the second solenoid valve 9 is residual by the connection one of the second oil pipe
Oil sump 12, the Residual oil pond 12 connect the oil storage tank 6 by a scavenge oil pump 13.
The system is used as control core using the PLC controller 1.When starting sampling, PLC controller 1 is to the servo
Driver 2 issues control and rotates forward pulse, and the servo motor 3 is driven to act, and then the roller 4 is driven to rotate, described in drive
Sampling pump 5 moves up and down in the oil storage tank 6, and after reaching setting sampling location, PLC controller 1 controls the servo motor 3
It stops operating.The PLC controller 1 controls the air compressor 7 and starts, and generates compressed air, and PLC controller 1 controls institute
It states the first solenoid valve 8 to open to the working position of the sampling pump 5 conveying compressed air, compressed air is as described in power source entrance
Sampling pump 5, the sampling pump 5 work, and the oil liquid in the oil storage tank 6 is inhaled into sampling pump 5；The PLC controller 1 controls
The second solenoid valve 9 is opened to the working position of 10 delivering oil of sampling pool, and oil liquid enters in sampling pool 10.By described
Flow sensor 11 realizes to having acquired the how many monitoring of oil mass, and in the form of analog quantity feedback in the PLC controller 1；
After oil liquid volume to be acquired to be achieved, PLC controller 1 closes the second solenoid valve 9 to 10 delivering oil of sampling pool
Working position, oil liquid do not enter back into sampling pool；PLC controller 1 issues motor reversal to the servo-driver 2 and controls pulse, electricity
Machine drives sampling pump 5 to return at the top of oil storage tank, and sampling stops.It is dynamic that the air compressor machine 7 continues as the offer of sampling pump 5 air
Power, sampling pump 5 work on, and the control of PLC controller 1 is opened the second solenoid valve 9 and remained into 12 delivery pipe of Residual oil pond
The working position of excess oil liquid closes the second solenoid valve 9 in pipe to be evacuated after remaining Residual oil, close first solenoid valve 8 to
The sampling pump 5 conveys the working position of compressed air, and sampling pump stops working；If 12 inner fluid of Residual oil pond is excessive, PLC control
Device 1 processed controls first solenoid valve 8 and opens to the working position of the scavenge oil pump 13 conveying compressed air, and compressed air is as dynamic
Power source enters the scavenge oil pump 13, and the scavenge oil pump 13 works, and the oil liquid in the Residual oil pond 12 is drawn back monologue story-telling with gestures oil storage tank 6.
As shown in Figures 2 to 4, the electric unit includes main circuit and control circuit, and the main circuit is mainly to sky
Press 7, servo motor 3, the first solenoid valve 8 and electric execution element power supply.
In Fig. 3, M1 is 7 motor of air compressor machine, and KH1 is the first hot protective relay；KH2 is the second hot protective relay；
YA1 is the first solenoid valve；YA2 is second solenoid valve；QF1 is the first breaker；QF2 is the second breaker.U5 is power filter
Device is used as electromagnetic compatibility EMC, protects motor and other equipment；U3 is servo-driver；SM is servo motor 3；U4 is coding
Device.
As shown in Figures 4 to 6, the control circuit is equipped with the PLC controller 1, and the PLC controller 1 is to control
The location information of system and feedback sample pump 5, control collection capacity feed back 12 oil mass of the Residual oil pond letter of sampling quantity information, feedback
Cease, control the on-off of the switch of scavenge oil pump 13 and first solenoid valve 8 and the second solenoid valve 9.
The servo-driver 2 receives the output pulse from PLC controller 1, controls the positive and negative rotation of the servo motor 3
Speed and time.
In Fig. 4, U2 is PLC controller；U1 is touch screen；U7 is touch screen power supply；U6 is flow sensor.The control
Circuit processed further includes to the touch screen and button switch to 1 input sample information of PLC controller.The touch screen passes through ether
Net and the PLC controller 1 communicate, to realize the automatic control of man-machine interface.The touch screen as automatically control when be
Sampling location and sampling quantity is written after the touch screen and PLC controller 1 realize communication in system input on the touchscreen in advance,
Sampling operation can be automatically performed by system.
The control circuit includes major control element PLC programmable controller 1, to automatic to PLC controller input
The touch screen 14 of sample information and input manually control each button switch of sample information, flow sensor 11 is fed back to PLC
Input has acquired oil sample volume, programmable controller PLC passes through the on-off of each relay of sequential control, contactor, and then controls
Whether subsequent each electric execution element obtains electric.
As shown in Figure 5 and Figure 6, the button switch is SB1-SB11.The button switch passes through digital quantity form and institute
State the communication of PLC controller 1.The button switch can be used as the input of system when manually controlling, and manual operation button switch leads to
Break to control the working condition of each element to realize manually controlling for sampling process.
As shown in Figure 7 and Figure 8, Fig. 7 is that the machine assembly is driven schematic diagram；Fig. 8 is the transmission of machine assembly of the invention
Another angle schematic diagram.In order to obtain biggish torque, the output end of the servo motor 3 connects a speed reducer 15, institute
It states speed reducer 15 and connects the roller.The servo motor 3 will move and power is transferred to speed reducer 15, and the speed reducer 15 will be electric
The revolving speed of machine is reduced to desired revolving speed, and obtains larger torque.
The speed reducer 15 preferably uses planetary reducer, and planetary reducer is compared to other types speed reducer, reduction ratio
It can be more accurate.
For the speed reducer 15 by roller described in transmission band connection, the roller includes roller part 16 and roller rope guide 4,
The output end of the roller part 16 connects a roller rope guide 4, and the roller rope guide 4 connects the sampling pump 5.The roller
It is driven and is rotated by servo motor 3, the roller part 16 completes take-up and unwrapping wire with the roller rope guide 4 jointly, to drive
5 raising and lowering of sampling pump.
In order to guarantee that folding and unfolding linear velocity is consistent, 16 thread pitch of roller part and 4 thread pitch of roller rope guide
It is identical.
The sampling pump 5 of the machine assembly is pneumatic diaphragm pump.The pneumatic diaphragm pump, which can be used for pumping, has height
Viscosity, liquid that is inflammable, having severe toxicity, and it is fire-proof and explosion-proof, therefore be elected to be as pneumatic apparatus, to realize suction oil purpose.
As shown in figure 9, Fig. 9 is gas circuit unit schematic diagram.First solenoid valve 8 of the gas circuit unit is two-bit triplet air valve.
Electric and power loss is obtained by controlling two end-coil of two-bit triplet air valve, whether controlling air valve or so the conducting of two working positions.With adopt
The working position conducting that sample pump 5 communicates, air compressor machine convey the compressed air as motive power to sampling pump, sample pump work；With return
The working position conducting that oil pump 13 communicates, air compressor machine convey compressed air, oil return pump work to scavenge oil pump.
Compressed air source unit of the air compressor machine 7 as gas circuit unit, using two-bit triplet air valve as pneumatic control components, two
Position three-way air valve is to generate pilot pressure by magnet control guide's gas circuit, and then pilot pressure pushes valve core of main valve mobile,
Make valve opening or closing, to make airflow-reversing.Air compresses through air compressor machine 7, becomes compressed air after dry and filtering, leads to
The coil for crossing control two-bit triplet air valve both ends obtains electric and power loss, to control the work of scavenge oil pump 13 or the sampling pump
5 work.
As shown in Figure 10, Figure 10 is oil liquid unit schematic diagram.The flow sensor 11 connects the PLC by signal wire and controls
Device 1 processed, the current signal that the flow sensor 11 exports establish the communication between PLC controller 1 as analog quantity.It is described
The perception of flow sensor 11 has acquired oil liquid volume, and feedback is in PLC controller in the form of analog quantity, when starting sampling, leads to
Overcurrent quantity sensor 11, which is learnt, has acquired oil liquid volume, after acquisition is completed, closes the second solenoid valve 9, sampling stops.When
When 12 oil liquid of Residual oil pond is excessive, the scavenge oil pump 13 is opened, oil liquid is drawn back into the oil storage tank 6.
The second solenoid valve 9 of the oil circuit unit is two-bit triplet oil valve, and the two-bit triplet oil valve coil obtains
Electricity and power loss are realized by the PLC controller 1 to be controlled, sampling start or at the end of, need first drain into the Residual oil in oil pipe described
In Residual oil pond 12, by controlling the open and close of the two-bit triplet oil valve difference valve port, to control described in oil liquid entrance
Residual oil pond 12 or the sampling pool 10.
The Residual oil pond 12 is connected by the scavenge oil pump 13 with the oil storage tank 6, when oil mass reaches in the Residual oil pond 12
When a certain amount of, the scavenge oil pump 13 is opened, and remaining oil liquid is drawn back in the oil storage tank 6.
This system can be manually controlled and be automatically controlled, specifically, as described below: when manually controlling, by button switch
Complete concrete operations.Initialization procedure is carried out to the operation of servo motor 3 height, revolving speed and analog input data address
Pretreatment, and initialize servo-driver 2.On the touch screen 14 after the revolving speed of writing servo motor 3, Ke Yixuan
It selects and is controlled using button or the touch screen 14.After being controlled using button, pressing SB8 and SB9 makes sampling pump raising and lowering,
Height in the 5 place oil storage tank 6 of sampling pump can be shown on the touch screen 14.Pressing SB4 later makes pneumatics
Machine 7 is opened, and compressed air pressure steps up.Press SB10, the gas circuit between first solenoid valve 8 and the sampling pump 5
Channel is opened, and compressed air enters sampling pump 5, and oil liquid is inhaled into sampling pump in oil storage tank 6；Meanwhile being connected with sampling pump 5,
It is opened to the asphalt channel of the second solenoid valve 9 of sampling pool delivering oil, oil sample enters sampling pool 10.Pass through flow sensor
11 can learn and acquire oil liquid volume, be shown on the touch screen 14.After reaching sampling request volume, by SB11, to
The asphalt channel of the second solenoid valve 9 of sampling pool delivering oil is closed, the second electricity of Residual oil in 12 delivery pipe of Xiang Suoshu Residual oil pond
Another asphalt channel of magnet valve 9 is opened, and is managed interior Residual oil and is entered Residual oil pond 12.Sampling pump 5 stops after being delayed, and sampling process terminates.
When 12 inner fluid of Residual oil pond is more, SB6 is pressed, the air compressor machine 7 is opened, via another gas circuit of first solenoid valve 8
Compressed air is provided for the scavenge oil pump 13, scavenge oil pump 13 is opened, and Residual oil in the Residual oil pond 12 is drawn back the oil storage tank 6.
By SB7, air compressor machine 7 is closed to the gas circuit that scavenge oil pump 13 provides compressed air, and scavenge oil pump 13 stops.Finally press SB5 make it is described
Air compressor machine 7 is shut down.
When automatic control, operation is completed on touchscreen 14.The touch screen 14 passes through Ethernet and the PLC controller
1 communication.Sampling pump rising, sampling pump decline, sampling pump unlatching, sampling pump closing, air compressor machine are equipped on shown touch screen 14
It opens, air compressor machine closing, scavenge oil pump unlatching, scavenge oil pump closing function icon, in this embodiment corresponding PLC controller
Indicate that storage address is M0.5, M0.6, M1.1, M1.2, M0.7, M1.0, M1.3, M1.4 in 1.The touch screen 14 is as certainly
System input when dynamic control, after the touch screen 14 realizes communication with PLC controller 1, in advance on the touch screen 14
Sampling location and sampling quantity is written, by observing height locating for the sampling pump 5 shown on the touch screen 14 and having adopted
The feedback informations such as oil-collecting liquid measure press the correlation function icon on the touch screen 14, automatic control can be completed.
As broken down, SB2 scram button, system power loss are pressed, each electric appliance stops working.It can be with after debugging
Reset scram button, system works on.
In addition, also needing to consider relevant protection system for the safety and stability that guarantee the operation of oil sample acquisition system；?
In the oil sample acquisition system, because ambient atmosphere lightening activity, internal operation such as close a floodgate and operate a switch, it will all cause electric system
State suddenly change occurs, this can usually damage electrical equipment, cause accident, therefore consider to be added to over-voltage and over-current guarantor
Shield；The control system that PLC controller 1 forms both connects heavy current installation, also connects weak current equipment, accordingly, it is considered to be added to anti-dry
Disturb measure.
Specifically, to prevent infringement of the overvoltage overcurrent to equipment, it can be with device lightning rod and lightning conducter.All keeps away
Thunder device is all needed equipped with reliable earthing or grounding means；The selection breaker strong using arc extinguishing ability；When carrying out tripping action
Pay attention to the periodicity of enhancing action；The installation of parallel resistance is carried out in the port of breaker；It to be selected in the selection of arrester
Performance is more excellent；Specifically, the letter that interference protection measure connects between the flow sensor 11 and the PLC controller 1
Number line uses shielding line, can thus resist external interference signal, can also be to avoid interference signal from entering inner conductor dry
The loss of transmission signal is reduced while disturbing；In the equipment for using three phase mains, followed by air-break circuit-breaker is equipped with noise
Filter, it is desirable that the input line of filter is shorter better；Power supply and the conducting wire for transmitting high current should be close to the bottom of electric box, and
It is routed along corner；Switching Power Supply should install isolation cover additional to prevent electromagnetic interference, and filter selects π type or T-type to can inhibit broadband
Electromagnetic noise, ferrite material can inhibit radio noise；Power supply line and signal wire require to be isolated or separate wiring between the two.
As shown in Figure 10: when sampling pump, which drops to, sets sampling location in oil storage tank, sampling starts.PLC controller control
Contactor KM1 coil processed obtain it is electric, contactor normally opened contact closure, air compressor motor obtain it is electric, for air compressor machine convey power, air compressor machine
Starting generates compressed air, the power source as pneumatic diaphragm pump.
Relay KA4 coil before PLC controller control two-bit triplet air valve obtains electric, relay normally open contact closure, into
And two-bit triplet air valve coil obtains electric, work once electrified position opening.Compressed air enters in sampling pump via air valve work once electrified position,
Pump startup is sampled, the oil liquid in oil storage tank is sucked in itself working chamber；Oil liquid is (normal via two-bit triplet oil valve power loss working position
State position) enter oil sample pond.Flow sensor perception has acquired oil sample volume, and the current signal of generation is fed back to PLC controller,
And oil sample amount will be acquired and be shown on touch screen.
Sampling volume is preset if reaching, PLC controller controls mechanical device and sampling pump is promoted at the top of oil storage tank,
Oil liquid does not enter back into sampling pump.Sampling process terminates, and sampling pump works on；Meanwhile PLC controller control two-bit triplet oil
Relay KA2 coil before valve obtains electric, and relay normally open contact closure, two-bit triplet oil valve coil obtains electric, oil valve work once electrified
Position is opened, and remaining oil liquid enters in Residual oil pond in sampling pump and pipeline.
If remaining oil liquid is excessive in Residual oil pond, PLC controller controls relay KA4 coil losing electricity, two-bit triplet air valve line
Power loss is enclosed, power loss working position (normality position) is opened.Compressed air enters in scavenge oil pump via air valve power loss working position, and scavenge oil pump opens
It is dynamic, the oil liquid in Residual oil pond is sucked back in oil storage tank.
Finally, PLC controller control contactor KM1 coil losing electricity, air compressor motor stalling, air compressor machine are shut down, sampling system
System work terminates.
As shown in figure 12: the pneumatic diaphragm pump is by discharge pipe 17, ball valve 18, ball valve seat 19, coupling bar 20, distributing valve
21, diaphragm 22 and feed pipe 23, the ball valve 18 and the ball valve seat 19 are four, the outlet phase of two ball valves 18
Lead to and connect, and constitute discharge pipe 17, the import of other two ball valve 18 is connected, and constitutes feed pipe 23, it is described every
Film 22 is two, is connected between two diaphragms 22 by the connecting rod 20, two diaphragms 22 are connected to one
Between the import of a ball valve 18 and the outlet of a ball valve 18, the distributing valve 21 is set between two diaphragms 22.
Pneumatic diaphragm pump changes swept volume of a single chamber using compressed air as power, by agitating back and forth for diaphragm to suck
With discharge liquid.
One piece of flexible diaphragm is respectively housed in two symmetrical working chambers of diaphragm pump, is connected to by center joining beam
One.Compressed air enters distributing valve from the air inlet of pump, introduces compressed air into a wherein chamber, push chamber by valve actuating mechanism
Inner septum movement, and gas is discharged in another chamber.Once reaching stroke end, valve actuating mechanism introduces compressed air into another automatically
Working chamber pushes diaphragm to move in the opposite direction, to move back and forth with making two diaphragm continuous synchronizations, realizes working media
Continuous sucking and discharge.Compressed air enters distributing valve in the example shown, moves downward diaphragm, then the suction of the room B make medium by
Entrance flows into, and pushes ball valve to enter room, B chamber side ball valve is then latched because of suction；After medium in the room A is extruded, it can push open
Square ball valve is flowed out by outlet, while lower section ball valve continues to be latched, and liquidproof is flow backwards, and moving in circles like this makes medium constantly from entering
It sucks at mouthful, is discharged from exit.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. a kind of oil storage tank oil sample acquisition system based on PLC control, it is characterised in that: including electric unit, machine assembly, gas
Road unit and oil circuit unit；The electric unit includes PLC controller (1), is driven with the servo of the PLC controller (1) communication
Dynamic device (2)；Contactor, the relay of the PLC controller (1) control each unit work, the machine assembly include with it is described
The servo motor (3) of servo-driver (2) communication, the roller (4) connecting with the servo motor (3) are connect with the roller
Sampling pump (5), the sampling pump (5) connects oil storage tank (6)；The gas circuit unit includes air compressor machine (7), with the air compressor machine
(7) the first solenoid valve (8) connected, the sampling pump (5) being connect with first solenoid valve (8)；The oil circuit unit include with
The second solenoid valve (9) of sampling pump (5) connection, wherein an outlet passes through the first oil pipe company with the second solenoid valve (9)
The sampling pool (10) connect；First oil pipe is equipped with flow sensor (11), the electric current of flow sensor (11) output
Signal inputs the PLC controller (1), and another oil outlet of the second solenoid valve (9) connects a Residual oil pond by the second oil pipe
(12), the Residual oil pond (12) connects the oil storage tank (6) by a scavenge oil pump (13)；The scavenge oil pump (13) is electrically connected institute
State the first solenoid valve (8).
2. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: the electrical list
Member further includes to the touch screen (14) and button switch to PLC controller (1) input sample information；The touch screen (14) is logical
It crosses Ethernet and the PLC controller (1) communicates；The button switch is logical by digital quantity form and the PLC controller (1)
News.
3. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: the servo electricity
The output end of machine (3) connects a speed reducer (15), and the speed reducer (15) connects the roller.
4. the oil storage tank oil sample acquisition system as claimed in claim 3 based on PLC control, it is characterised in that: the speed reducer
(15) by roller described in transmission band connection, the roller includes roller part (16) and roller rope guide (4), the roller part
(16) output end connects a roller rope guide (4), and the roller rope guide (4) connects the sampling pump (5).
5. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: the flow passes
Sensor (11) connects the PLC controller (1) by signal wire；The signal wire uses shielding line.
6. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: the sampling pump
It (5) is pneumatic diaphragm pump.
7. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: first electricity
Magnet valve (8) is two-bit triplet air valve.
8. the oil storage tank oil sample acquisition system as described in claim 1 based on PLC control, it is characterised in that: second electricity
Magnet valve (9) is two-bit triplet oil valve.
9. as claimed in claim 6 based on PLC control oil storage tank oil sample acquisition system, it is characterised in that: it is described pneumatically every
Membrane pump is by discharge pipe (17), ball valve (18), ball valve seat (19), coupling bar (20), distributing valve (21), diaphragm (22) and feed pipe
(23), the ball valve (18) and the ball valve seat (19) they are four, and the outlet of two ball valves (18) is connected, and
It constitutes discharge pipe (17), the import of other two ball valve (18) is connected, and constitutes feed pipe (23), the diaphragm
(22) it is two, is connected between two diaphragms (22) by the connecting rod (20), two diaphragms (22) connect respectively
It connects between the import of ball valve (18) and the outlet of a ball valve (18), matches described in setting between two diaphragms (22)
Air valve (21).
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| CN201910001157.9A CN109580294A (en) | 2019-01-02 | 2019-01-02 | A kind of oil storage tank oil sample acquisition system based on PLC control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001157.9A CN109580294A (en) | 2019-01-02 | 2019-01-02 | A kind of oil storage tank oil sample acquisition system based on PLC control |
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| CN109580294A true CN109580294A (en) | 2019-04-05 |
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| CN201910001157.9A Pending CN109580294A (en) | 2019-01-02 | 2019-01-02 | A kind of oil storage tank oil sample acquisition system based on PLC control |
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| CN110320852A (en) * | 2019-07-27 | 2019-10-11 | 江苏倍川自动化设备有限公司 | A kind of wire structures of control button |
| CN111649997A (en) * | 2020-06-22 | 2020-09-11 | 国家电网有限公司 | Power equipment oil appearance collection system |
| CN113588034A (en) * | 2021-07-29 | 2021-11-02 | 上海电力大学 | Method for rapidly and quantitatively monitoring volume of gas in transformer oil |
| CN114264517A (en) * | 2022-01-29 | 2022-04-01 | 抚顺市博瑞特科技有限公司 | Sampling device and sampling method on any point tank |
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