CN102878415B - Improved fan oil station electrical control system - Google Patents
Improved fan oil station electrical control system Download PDFInfo
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- CN102878415B CN102878415B CN201210387766.0A CN201210387766A CN102878415B CN 102878415 B CN102878415 B CN 102878415B CN 201210387766 A CN201210387766 A CN 201210387766A CN 102878415 B CN102878415 B CN 102878415B
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Abstract
The invention particularly discloses an improved fan oil station electrical control system, which comprises a main loop and a secondary loop, wherein the main loop comprises a primary power supply circuit of an oil station pump; the secondary loop comprises a control loop of the oil station pump and an instrument-controlling instrument control loop; primary power supplies of the oil station pump in the main loop respectively supply power directly; phase-sequence relays are introduced to direct power supply ends of the primary power supplies of the oil station pump; second power supplies in the oil station pump control circuit in the secondary loop are respectively introduced by C-phase power supplies of the first power supply; and a two-position relay and a DCS (Distributed Control System) control point are arranged in the oil station pump control loop of the secondary loop.
Description
Technical field
The present invention relates to a kind of improved blower fan petrol station electric control system.
Background technology
Small-sized Lubricating-oil Station is mainly used in metallurgy, in the thin Oil Lubricating System of the plant equipment such as generating, and to speed reduction unit, induced draft fan, pressure fan, the friction such as driving motor bearing position feed lubricating oil, is the important component part of subsidiary engine equipment.Small-sized Lubricating-oil Station is mainly made up of fuel tank, oil pump device, filtrator, column tube oil cooler, electrical control cubicles, instrument panel, pipeline, valve etc., and the electric control system of the electrical control cubicles heart of Lubricating-oil Station especially, power source, therefore, the quality of electric control system, directly affects safety and stability and effect of whole Lubricating-oil Station.The main existent defect of existing market general small-size Lubricating-oil Station electric control system:
1. major loop hidden danger
The existing market general small-size Lubricating-oil Station overwhelming majority once all design configurations dual power supply form to ensure power supply reliability.Its dual power supply is supplied with two motors and well heater after switching circuit switches.Power-switching control circuit at least through two-stage contact action connect, some switching controls loop also increases the gasbag-type time relay and ensures the input of standby power supply.But the cardinal rule of control loop is to utilize the least possible components and parts to reach desirable effectiveness.Its switching circuit starts through multistage contact, must increase the hidden danger of loop breakpoint, and the air bag of gasbag-type relay is subject to the impact of environment temperature larger, and for example time changes, and the phenomenon such as does not return to.Therefore, if break down in switching controls loop, even if auxiliary power for subsequent use is normal, also will cause the whole pump machine of petrol station decompression, and then cause blower fan tripping operation, compressor emergency shutdown accident.
2. secondary circuit imperfection
Existing market general small-size Lubricating-oil Station control instrument instrument control secondary circuit shares miniature transformer transformation output AC 220V power supply control in an electrical control cubicles together with merging with petrol station pump machine control secondary circuit.Control instrument instrument component is installed on petrol station body, be connected through cable with electrical control cubicles, control instrument instrument component and mechanical pipeline one, running environment is compared with electrical control cubicles complexity, will cause whole secondary circuit system dead electricity if control instrument instrument control loop breaks down, same, although the interior pump machine control loop of electrical control cubicles breaks down, probability is less, but one has fault, also will cause whole secondary circuit system dead electricity.Moreover, if miniature transformer breaks down, also will cause whole secondary circuit system dead electricity.
3, the supervision of petrol station pump electromechanical source disappearance
In new power plant construction, MCC combined type screen cabinet is widely applied at present.MCC drawer type power supply components and parts are concentrated, and occupy little space.But using Zhong Zhu power plant all to occur loose contact, cause motor primary power source phase shortage phenomenon.As everyone knows, motor power phase shortage, pressure drop reduces, when empty load of motor, electric current is less, can not cause compared with macrolesion motor, in the time that load is larger, will inevitably increase because electric current is steep and cause that the motor feels hot, even best F level electrical machine insulation at present, the time that motor can turn round is also limited, must cause motor to damage.
4, without decompression self-starting function
Described in before combining, the whole pump machine of petrol station decompression, will cause blower fan tripping operation, compressor emergency shutdown accident.Therefore, after Lubricating-oil Station decompression, self-starting seems particularly important fast, and makes a general survey of current Lubricating-oil Station data, and the Lubricating-oil Station of domestic each enterprise production application not yet finds to have the Lubricating-oil Station electric control system of decompression self-starting function.
5, interlock hidden danger
Between pump machine, interlocking starts after multistage contact is connected, and hidden danger is more.The loose contact of arbitrary interlock circuit contact or its starting relay poor starting damage etc., all will cause whole interlock circuit to lose efficacy, and when fault, cause stand-by pump to drop in time, and consequence is blower fan tripping operation, and then unit is non-stops.
6, DCS is far controlled function and DCS alarm set point imperfection
The DCS control far away of the small-sized Lubricating-oil Station of a current domestic part is only directed to and starts loop, and the two pumps machine in standing cannot be controlled respectively, and Datang Huang Island Power Generation Corporation Ltd. three phases six strong wind machine oil station also possesses this defect.Alarm set point on the spot is not all introduced DCS, makes operations staff's complex operation and supervision have blind area, and electrical control cubicles could check whole alarm set points extremely on the spot.
Summary of the invention
The shortcoming existing for solving prior art, the invention provides a kind of improved blower fan petrol station electric control system.
The technical solution used in the present invention is as follows:
A kind of improved blower fan petrol station electric control system, comprise major loop and secondary circuit, described major loop comprises feed circuit of petrol station pump machine, described secondary circuit comprises petrol station pump machine control loop and control instrument instrument control loop, described feed circuit are directly powered by power supply, introduce phase sequence supervisory relay at the feeder ear of described feed circuit; Described petrol station pump machine control loop is powered respectively with control instrument instrument control loop, is also provided with two-position relay and DCS system reference mark in petrol station pump machine control loop.
Described petrol station pump machine comprises petrol station pump machine I and petrol station pump machine II, the power supply of feed circuit of described petrol station pump machine I is attracted by boiler MCC end, the power supply boiler security personnel MCC end of feed circuit of described petrol station pump machine II attracts, be respectively equipped with power supply at the power supply leading-in end of feed circuit of described petrol station pump machine I and petrol station pump machine II and input empty opening apparatus, be respectively equipped with power supply at the power output end of feed circuit of petrol station pump machine I and petrol station pump machine II and export empty opening apparatus.
Described petrol station pump machine control loop comprises the control loop of petrol station pump machine I and the control loop of petrol station pump machine II, and the control loop power supply of described petrol station pump machine I is introduced by the C phase power supply of boiler MCC end power supply; The control loop power supply of described petrol station pump machine II is introduced by the C phase power supply of boiler security personnel MCC end power supply.
The power supply of described control instrument instrument control loop comprises major and minor power supply, is introduced respectively by feed circuit of petrol station pump machine I and feed circuit of petrol station pump machine II.
Be respectively equipped with power supply at the leading-in end of described major and minor power supply and input empty opening apparatus, in the control circuit of major and minor power supply, be respectively equipped with a contactless contactor, the coil of the contactless contactor of main power circuit is located in auxiliary power circuit, and the coil of the contactless contactor of auxiliary power circuit is located in main power circuit.
Described petrol station pump machine control loop be provided with a distant place switch and local operation button on the spot.
Described control instrument instrument control loop the inside is provided with power monitoring relay, its normally closed contact access DCS system, and its normally opened contact is introduced the control loop of petrol station pump machine.
The normally closed contact of described phase sequence supervisory relay is introduced the warning circuit of DCS system.
The main contacts of described two-position relay is connected with the DCS system reference mark of petrol station pump machine control loop, and auxiliary contact indicate loop to be connected with Contactor Starting loop, the startup instruction loop of petrol station pump machine control loop with stopping respectively.
Control loop the inside in described petrol station pump machine I is provided with interlocking switch I, and the auxiliary contact of interlocking switch I are located in the control loop of petrol station pump machine II; Control loop the inside in described petrol station pump machine II is provided with interlocking switch II, and the auxiliary contact of interlocking switch II are located in the control loop of petrol station pump machine I.
Described DCS system is Distributed Control System (DCS).
The invention has the beneficial effects as follows: by rectification, the electric control system of whole Lubricating-oil Station is obtaining very big lifting aspect security, stability and effect, possessed following advantage:
1, major loop hidden danger: because having simplified switching controls loop, cancelled the gasbag-type time relay, the probability that switching circuit breaks down is reduced.Supply with an AC power of motor rotation and supply with through the pump electrical-mechanical control loop of redesign, avoided making the stall of motor decompression because of primary power switching circuit fault.
2, secondary circuit hidden danger: in pump machine control loop electrical control cubicles, two pumps is independent separately, simplifies without impact and loop mutually, is convenient to maintenance test.To control the control of instrument instrument circuit and the isolation of pump machine control loop, avoid with the comprehensive interference forming of front loop and the drawback of loop complex maintenance difficulty.
3, the supervision of primary power source disappearance hidden danger: the phase sequence supervisory relay of creationary newly-increased dependable performance, effectively monitors the motor damage of having avoided phase shortage to cause.
4, without decompression self-starting function hidden danger: set up two-position relay in newly-designed petrol station pump machine control loop, state characteristic while utilizing its power-off back contact to keep former startup, self-starting after guarantee decompression.Effectively improve safe and stable equipment operation.
5, interlock hidden danger: interlock circuit simplifies but function is constant, makes it safety and stability reliability and improves.
6, DCS system is far controlled function and the road perfect in shape and function of DCS system alarm circuit, and petrol station pump machine can be controlled respectively by DCS system in central station of floating dock, reduces operations staff's maloperation.All on the spot alarm set points are introduced to DCS microcomputer and show, make operations staff monitor convenient convenience.
Brief description of the drawings
Fig. 1 main circuit diagram 1 of the present invention;
Fig. 2 secondary circuit partial circuit of the present invention figure;
Partial circuit figure in Fig. 3 DCS system of the present invention;
Partial circuit figure in Fig. 4 DCS system of the present invention;
The control circuit of Fig. 5 petrol station pump machine I;
The control circuit of Fig. 6 petrol station pump machine II;
Embodiment
In components and parts circuit as shown in Fig. 1,2,3,4,5,6, electrical action principle and the effect of important configuration original paper:
1. configuration element:
1.1QF1, QF2: power supply is inputted empty opening apparatus, receive from upper level MCC cabinet and exchange primary power source.QF1 is connected with petrol station pump machine I power supply, and QF2 is connected with petrol station pump machine II power supply;
1.2, QF3, QF4: power supply is inputted empty opening apparatus, the power supply of the control instrument instrument power switching circuit that it represents is inputted empty opening apparatus.
1.3FU1, FU2: power supply is exported empty opening apparatus; FU1 exports empty opening apparatus as petrol station pump machine I power supply, and FU2 exports empty opening apparatus as petrol station pump machine II power supply.While also having a vital role to be exactly motor control loop fault, disconnect the empty opening apparatus of FU1, FU2, can carry out transmission inspection to secondary circuit separately;
1.4FU3, FU4: power supply is inputted empty opening apparatus; The empty opening apparatus of input side of electrical control cubicles miniature transformer BT, while preventing fault, BT damages;
1.5:FU5: power supply is exported empty opening apparatus; The empty opening apparatus of bis-outgoing sides of electrical control cubicles miniature transformer BT;
1.6:BT: transformer; Electrical control cubicles miniature transformer, once inputs AC380V, secondary output AV220V;
1.7:1C, 2C: contactless contactor; The contactless contactor of 1C petrol station pump machine I, the contactless contactor of 2C petrol station pump machine II;
1.8:KM1, KM2: contactless contactor; They are respectively AC380V AC power switching circuit contactless contactors;
1.9:KM5: contactless contactor; Electric heater ac power supply circuit contactless contactor;
1.10:JJ: power monitoring relay; It is control instrument instrument control loop power monitoring relay.Its normally closed contact access DCS system, monitor and report to the police as control instrument instrument control loop power supply dead electricity, its normally opened contact 1, normally opened contact 2 are introduced in electrical control cubicles petrol station pump machine I, petrol station pump machine II control interlock circuit, disconnect " low oil pressure " interlock circuit during as control instrument instrument control loop power supply dead electricity.
1.11XV1, XV2: phase sequence supervisory relay, is installed on electrical control cubicles, whether defect of monitoring motor primary power source, protection Oil pump electrical machinery;
1.12FR1, FR2: thermocouple protector, its normally closed contact is connected to the control loop of petrol station pump machine, prevents petrol station pump machine I, petrol station pump machine II overload, protection motor.The warning circuit of normally opened contact access DCS system, sends warning when overload;
1.13 1ST: control instrument temperature switch;
1.14 SP0, SP1, SP2: liquid level pressure switch;
1.15 SL1, SL2: control instrument pressure switch;
1.16 KA6, KA7, KA9, KA10, KA10, KA11, KA12, KA13: pressure switch expansion relay; Be installed in electrical control cubicles;
1.17 1CK, 2CK: a distant place/switch on the spot; They are installed on petrol station pump machine I, petrol station pump machine II control loop in electrical control cubicles;
1.18 1KK, 2KK: interlocking switch; They are installed on the petrol station pump machine I in electrical control cubicles, the control loop interlocking switch of petrol station pump machine II;
1.19 1SWJ, 2SWJ: two-position relay, for the self-starting of motor decompression.
1.20 M1, M2: petrol station pump machine I, petrol station pump machine II.
1.21 115,116: normally opened contact; A1, the contactor of A2:1C contactless contactor;
1.22 1ZK, 2ZK represent respectively switch; 1HA switch knob; 2HA switch knob; H1, H2 pilot lamp;
Electrical action principle
The major and minor electrical source exchange of the power supply loop of 2.1 control instrument instrument control loops
Power turn-on is inputted empty opening apparatus QF1, QF2, and power turn-on is inputted empty opening apparatus QF3, utilizes the coil KM1 of the normally closed connection contactless contactor of contactless contactor KM2 KM1, makes its excitation, and in electrical control cubicles, primary power pilot lamp H1 is bright, and primary power is sent into; If mains power failure, connects the coil KM1 loss of excitation of tentaculum K switch M1, its normally closed contact returns, and instantaneous starting connects the coil KM2 of tentaculum K switch M2, makes its excitation, sends into auxiliary power; Vice versa.
Electric heater start and stop in 2.2 control instrument instrument control loops
Power turn-on is inputted empty opening apparatus FU3, in the time that the control instrument temperature switch 1ST of oil temperature pressure reaches " oil temperature is low " higher limit, pressure switch expansion relay K A6 action, control instrument pressure switch SL1 does not reach limit value, pressure switch expansion relay K A12 is failure to actuate, in electrical control cubicles, electric heater start-stop button SA2 is put to co-bit, contactless contactor KM5 excitation, electric heater starts.Start-stop button SA2 puts and jumps position, electric heater tripping operation.Electric heater starting state, if when oily temperature controller temperature switch 1ST reaches " oil temperature is high " higher limit, pressure switch expansion relay K A7 action, electric heater tripping operation.Control instrument pressure switch SL1 reaches the low limit value of liquid level, liquid level low-pressure switch expansion relay K A12 action, electric heater tripping operation.
The control loop of 2.3 petrol station pump machines
1) normal start and stop
1ZK closes a switch; a distant place/switch 1CK is placed in regard to position on the spot; interlocking switch 1KK is placed in rest position; by switch knob 1HA on electrical control cubicles door; two-position relay 1SWJ closing coil excitation, two-position relay 1SWJ action, its normally opened contact 115,116 closures; the contactor excitation actuating of contactless contactor 1C when by thermocouple protector FR1 normally closed some, petrol station pump machine I M1 obtains electric operation.By trip button 1TA on electrical control cubicles door, the breaking coil excitation of two-position relay 1SWJ, 1SWJ action, its normally opened contact 115,116 disconnects, and makes the contactor A1 of contactless contactor 1C, A2 excitation loss of excitation, the stall of petrol station pump machine I M1 dead electricity.A distant place/switch 1CK is placed in remote location on the spot, the combined floodgate of DCS system, the same state on the spot of trip operation program.
2) dead electricity self-starting
If petrol station pump machine I M1 occurs the low dead electricity of transience voltage at run location, two-position relay 1SWJ still keeps its state in the time of closing position, normally opened contact 115,116 closures.When voltage recovers, the instantaneous contactor A1 that makes contactless contactor 1C, A2 excitation, ensures that motor runs well.
3) interlock circuit
The operation of petrol station pump machine I; interlocking switch 1KK is placed in and removes position; interlocking switch 2KK is placed in interlocking position; 3,4 of interlocking switch 2KK connects; if occur, thermocouple protector FR1 overload action or other faults cause petrol station pump machine I M1 tripping operation, and the contactor loss of excitation of contactless contactor 1C returns, its contactless contactor 1C normally closed contact return to closure; the instantaneous 2SWJ excitation actuating that makes, starting contactor switch 2C contactor makes petrol station pump machine II interlocked startup for subsequent use.
If the low oil pressure of petrol station pump machine I M1 emerged in operation, liquid level pressure switch SP1 reaches low oil pressure limit value and returns, and pressure switch expansion relay K A10 ' loss of excitation returns, and the normally closed point of pressure switch expansion relay K A10 ' is connected instantaneous starting petrol station pump for subsequent use machine II M2.When liquid level pressure switch SP0 reaches the action of oil pressure normal limit, pressure switch expansion relay K A9 excitation actuating, by 1,2 contacts of interlocking switch 2KK and the former work petrol station of the normally opened contact tripping pump machine I M1 of contactless contactor 2C, make oil pressure remain at normally-pressured neighbor.
Rectification is made latter two petrol station pump machine primary power source and is attracted respectively by boiler MCC section, boiler security personnel MCC section, petrol station pump machine I M1 is directly powered by boiler MCC section, petrol station pump machine II M2 is directly powered by boiler security personnel MCC section, cancels through the primary power source drawback that power supply causes after switching.Switching circuit control loop is cancelled gasbag-type relay and intermediate link contact, is directly started and is connected by switching contactor auxiliary contact.
Rectification is made rear control instrument instrument control loop and to transformer transformation in electrical control cubicles, is powered after major-minor electrical source exchange.The power supply of two pump petrol station pump machines of petrol station two pumps machine is introduced by introducing separately MCC section C phase power supply, sets up small size air opening apparatus, and pump machine control loop is redesigned to distribution, set up distant place switch on the spot, local operation button, realizes push-botton operation on the spot, and distant place DCS operates respectively.Control instrument instrument control loop and two petrol station pump machine control loops are independent separately, are independent of each other.
After rectification, in the pump machine control loop redesigning, newly increase two-position relay, state characteristic while utilizing its power-off back contact to keep former startup, self-starting after guarantee decompression.
Rectification is made the electric hard interlocking in rear loop and is directly started by contactor contact.Oil pressure interlocking is directly by control instrument low oil pressure contact expansion relay tip interlocked startup.In the time of low oil pressure, the stand-by pump that directly links, in the time that oil pressure is high, by the interlock circuit former working barrel that trips.
Lay newly-increased control cables, newly-increased DCS reference mark, controls separately electrical control cubicles two pumps machine.All on the spot alarm set points are introduced to DCS microcomputer and show, operations staff is operated and monitor convenient convenience.
Claims (8)
1. an improved blower fan petrol station electric control system, comprise major loop and secondary circuit, described major loop comprises feed circuit of petrol station pump machine, described secondary circuit comprises petrol station pump machine control loop and control instrument instrument control loop, it is characterized in that: described feed circuit are directly powered by power supply, introduce phase sequence supervisory relay at the feeder ear of described feed circuit; Described petrol station pump machine control loop is powered respectively with control instrument instrument control loop, is also provided with two-position relay and DCS system reference mark in petrol station pump machine control loop;
Described control instrument instrument control loop the inside is provided with power monitoring relay, its normally closed contact access DCS system, and its normally opened contact is introduced the control loop of petrol station pump machine;
The normally closed contact of described phase sequence supervisory relay is introduced the warning circuit of DCS system.
2. the improved blower fan petrol station of one as claimed in claim 1 electric control system, it is characterized in that: described petrol station pump machine comprises petrol station pump machine I and petrol station pump machine II, the power supply of feed circuit of described petrol station pump machine I is attracted by boiler MCC end, the power supply boiler security personnel MCC end of feed circuit of described petrol station pump machine II attracts, be respectively equipped with power supply at the power supply leading-in end of feed circuit of described petrol station pump machine I and petrol station pump machine II and input empty opening apparatus, be respectively equipped with power supply at the power output end of feed circuit of petrol station pump machine I and petrol station pump machine II and export empty opening apparatus.
3. the improved blower fan petrol station of one as claimed in claim 2 electric control system, it is characterized in that: described petrol station pump machine control loop comprises the control loop of petrol station pump machine I and the control loop of petrol station pump machine II, the control loop power supply of described petrol station pump machine I is introduced by the C phase power supply of boiler MCC end power supply; The control loop power supply of described petrol station pump machine II is introduced by the C phase power supply of boiler security personnel MCC end power supply.
4. the improved blower fan petrol station of one as claimed in claim 1 electric control system, it is characterized in that: the power supply of described control instrument instrument control loop comprises major and minor power supply, introduced by feed circuit of petrol station pump machine I and feed circuit of petrol station pump machine II respectively.
5. the improved blower fan petrol station of one as claimed in claim 4 electric control system, it is characterized in that: be respectively equipped with power supply at the leading-in end of described major and minor power supply and input empty opening apparatus, in the control circuit of major and minor power supply, be respectively equipped with a contactless contactor, the coil of the contactless contactor of main power circuit is located in auxiliary power circuit, and the coil of the contactless contactor of auxiliary power circuit is located in main power circuit.
6. the improved blower fan petrol station of one as claimed in claim 1 electric control system, is characterized in that: described petrol station pump machine control loop be provided with a distant place switch and local operation button on the spot.
7. the improved blower fan petrol station of one as claimed in claim 1 electric control system, it is characterized in that: the main contacts of described two-position relay is connected with the DCS system reference mark of petrol station pump machine control loop, auxiliary contact indicate loop to be connected with Contactor Starting loop, the startup instruction loop of petrol station pump machine control loop with stopping respectively.
8. the improved blower fan petrol station of one as claimed in claim 2 electric control system, is characterized in that: the control loop the inside in described petrol station pump machine I is provided with interlocking switch I, and the auxiliary contact of interlocking switch I are located in the control loop of petrol station pump machine II; Control loop the inside in described petrol station pump machine II is provided with interlocking switch II, and the auxiliary contact of interlocking switch II are located in the control loop of petrol station pump machine I.
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| CN201210387766.0A CN102878415B (en) | 2012-10-11 | 2012-10-11 | Improved fan oil station electrical control system |
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| CN201210387766.0A CN102878415B (en) | 2012-10-11 | 2012-10-11 | Improved fan oil station electrical control system |
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| CN102878415B true CN102878415B (en) | 2014-11-26 |
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| CN104333124B (en) * | 2014-11-25 | 2016-05-25 | 济南重工股份有限公司 | A kind of dual power supply of high-low pressure Lubricating-oil Station is hauled oneself willingly into circuit |
| CN106877319A (en) * | 2017-04-05 | 2017-06-20 | 韩守相 | A kind of fan oil station power connection structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3783199A (en) * | 1970-06-24 | 1974-01-01 | Lanier Electronic Lab Inc | Switching apparatus for selectively interconnecting oiltation machines and stations |
| JPH03148799A (en) * | 1989-11-02 | 1991-06-25 | Tokyo Electric Co Ltd | Power source controller for sales data processor for oil station |
| CN201207583Y (en) * | 2008-04-25 | 2009-03-11 | 济南重工股份有限公司 | Power supply circuit for high-low voltage rare oil station |
| CN201557068U (en) * | 2009-09-15 | 2010-08-18 | 西安陕鼓动力股份有限公司 | Control device of electromotor lift-up oil pump for fan |
| CN202435290U (en) * | 2011-12-16 | 2012-09-12 | 济南重工股份有限公司 | Power supply control circuit for high and low pressure thin oil station of coal mill |
| CN202884446U (en) * | 2012-10-11 | 2013-04-17 | 大唐黄岛发电有限责任公司 | Improved draught fan oil station electrical control system |
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