CN100593144C - Local and remote controlled non-stop conversion method and its circuit - Google Patents
Local and remote controlled non-stop conversion method and its circuit Download PDFInfo
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- CN100593144C CN100593144C CN200610200667A CN200610200667A CN100593144C CN 100593144 C CN100593144 C CN 100593144C CN 200610200667 A CN200610200667 A CN 200610200667A CN 200610200667 A CN200610200667 A CN 200610200667A CN 100593144 C CN100593144 C CN 100593144C
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Abstract
The invention discloses a locally and remotely controlled nonstop conversion method and circuit, when local control box starts electric machine (M), two circuits supply power to AC contactor (KM) coil, one is a circuit passing through conversion switch (SA) and the other is a transition hold circuit not passing through the conversion switch (SA); in the course that the conversion switch (SA) is converted from local position to remote position, the conversion switch cuts off the circuit supplying power to the AC contactor (KM) coil and the AC contactor (KM) coil is electrified by the transitionhold circuit; when the conversion switch (SA) is arranged in the remote position, the transition hold circuit is opened, and the AC contactor (KM) coil is controlled by DCS remote control screen to complete nonstop conversion of control mode. And the invention is simple and practical, and adds no devices and cables to be able to meet nonstop conversion requirements, and besides, can be compatiblewith original operating mode, having good economy, flexible to use and able to simplify the operation process flow.
Description
A kind of this locality and Long-distance Control do not shut down conversion method and circuit thereof
Technical field
The present invention relates to the conversion method and the circuit thereof of a kind of this locality and Long-distance Control, particularly a kind of be used for the alumina producer pumping motor local with Long-distance Control do not shut down conversion method and circuit thereof.
Background technology
The operation of alumina producer product pump is by the DCS Centralized Monitoring of remote control center, but the startup of product pump, stop the technological process more complicated, the operator must be arranged at the scene to some flow process manual operation, such as the admission valve of opening material, outlet valve also will be observed the operation of product pump.Present operating process is such: the isolating switch that low pressure is shielded in (drawer) by the operating personnel at scene closes earlier, again the switch on the local control box is placed local position, open the import hand valve of product pump, and then press start button, whether slowly open the outlet hand valve, it is normal to observe the product pump operation.If the product pump operation is normal, press stop button again, close the power supply of product pump, slowly close manual outlet valve again, switch on the local control box is placed remote location, notify the staff of control center then, restart product pump by the long-range DCS control system that is located at control center again, on-the-spot operator opens manual outlet valve once more.This start-up course is too loaded down with trivial details, start product pump twice, also will open and close hand valve twice, has strengthened working strength of workers, and is simultaneously also unfavorable to the operation of product pump and motor.
Summary of the invention
The objective of the invention is to: what a kind of this locality and Long-distance Control were provided does not shut down conversion method and circuit thereof.Its method is simple and practical, and primary circuit is changed not quite, can reach the requirement of not shutting down conversion, and the technological process that also can simplify the operation simultaneously reduces labor strength, prolongs the serviceable life of equipment.
Technical scheme of the present invention: a kind of this locality and Long-distance Control do not shut down conversion method, behind local control box starter motor M, there are two loops to give A.C. contactor KM coil power supply, article one, be loop through switch SA, another is the transition maintenance loop without switch SA, be converted in the transient process of remote location by local position at switch SA, switch SA is cut to the loop of A.C. contactor KM coil power supply, and A.C. contactor KM coil keeps loop power supply by transition; After treating that SA places remote location, transition keeps the loop to disconnect, and A.C. contactor KM coil is finished control mode and do not shut down conversion by the control of DCS Long-distance Control screen.
A kind of this locality and Long-distance Control do not shut down change-over circuit, form by DCS Long-distance Control screen 1, low pressure screen 2 and local control box 3; Switch SA in the local control box 3 is three groups of three-postion switch, the sequence of positions of switch SA is maintenance/this locality/distant place, be connected No. 5 terminals of local control box 3 and low pressure after one of them of A.C. contactor KM often left node and the normally closed node of charged time-delay of auxiliary reclay KA2 connect in the low pressure screen 2 and shield between 2 No. 7 terminals, low pressure is shielded 2 No. 8 terminals and is connected with No. 6 terminals of local control box 3.
Not shutting down in the change-over circuit of above-mentioned this locality and Long-distance Control, auxiliary reclay KA2 coil one end in the low pressure screen 2 connects the zero terminal N of low pressure screen 2, and the other end connects No. 8 terminals of low pressure screen 2.
Not shutting down in the change-over circuit of aforesaid this locality and Long-distance Control; No. 5 terminals of local control box 3 connect the end that the stop button SB1 in the local control box 3 are connected with switch SA, and No. 6 terminals of local control box 3 connect on local control box 3 internal conversion switch S A and the long-range movable cursor slide that is connected.
Compared with prior art; the inventive method is simple and practical; need not increase components and parts and cable, only primary circuit be transformed slightly, promptly can reach the requirement of not shutting down conversion; simultaneously also can compatible original mode of operation; good economy performance is used flexibly, and technological process can simplify the operation; reduce labor strength, prolong the serviceable life of equipment.
Description of drawings
Fig. 1 is electric control theory figure of the present invention;
Fig. 2 is original electric control theory figure;
Being labeled as in the accompanying drawing: M-product pump motor, QF-isolating switch, KM-A.C. contactor; KA2-auxiliary reclay (the normally closed node of charged time-delay), KA1-auxiliary reclay, the auxiliary reclay in the KA3-DCS Long-distance Control screen; the SB1-stop button; the SB2-start button, SA-switch, FR-electrothermal relay; FU1-control circuit fuse; fuse in the FU2-DCS Long-distance Control screen, HL1-overload protection pilot lamp, HL2-product pump relay indicating light.
Embodiment
Embodiment.A kind of this locality and Long-distance Control do not shut down conversion method, behind local control box 3 starter motor M, there are two loops to give A.C. contactor KM coil power supply, article one, be loop through switch SA, another is the transition maintenance loop without switch SA, be converted to by local position in the transient process of remote location at switch SA, switch SA is cut to the loop of A.C. contactor KM coil power supply, and A.C. contactor KM coil keeps loop power supply by transition; After treating that SA places remote location, transition keeps the loop to disconnect, and A.C. contactor KM coil is finished control mode and do not shut down conversion by 1 control of DCS Long-distance Control screen.
A kind of this locality and Long-distance Control do not shut down change-over circuit, form by DCS Long-distance Control screen 1, low pressure screen 2 and local control box 3; Switch SA in the local control box 3 is three groups of three-postion switch, the sequence of positions of switch SA is maintenance/this locality/distant place, be connected No. 5 terminals of local control box 3 and low pressure after one of them of A.C. contactor KM often left node and the normally closed node of charged time-delay of auxiliary reclay KA2 connect in the low pressure screen 2 and shield between 2 No. 7 terminals, low pressure is shielded 2 No. 8 terminals and is connected with No. 6 terminals of local control box 3.Auxiliary reclay KA2 coil one end in the low pressure screen 2 connects the zero terminal N of low pressure screen 2, and the other end connects No. 8 terminals of low pressure screen 2.No. 5 terminals of local control box 3 connect the end that the stop button SB1 in the local control box 3 are connected with switch SA, and No. 6 terminals of local control box 3 connect on local control box 3 internal conversion switch S A and the long-range movable cursor slide that is connected.
The principle of work of circuit of the present invention and operating process thereof:
Isolating switch closes.Close earlier before the work circuit breaker Q F in the low pressure screen 2, when closing circuit breaker Q F, the circuit breaker Q F that connect with auxiliary reclay KA1 coil auxiliary often opens also closure simultaneously of node; Auxiliary reclay KA1 coil gets electric, and auxiliary reclay KA1 connects with A.C. contactor KM coil often leaves the node closure, for this locality start or remote activation ready.
SA places local position with switch, opens the hand valve of product pump import.
Start product pump.By the start button SB2 on the local control box 3, power supply L1 is through fuse FU1, stop button SB1, switch SA, start button SB2, auxiliary reclay KA1 often leaves node, A.C. contactor KM coil is formed the loop to zero line N, and A.C. contactor KM coil gets; A.C. contactor KM coil get electric after, A.C. contactor KM is connected the auxiliary node closure, KM self-sustaining often opened between 3 and No. 4 connection terminals of low pressure screen; A.C. contactor KM is connected the auxiliary node closure of often opening between No. 5 connection terminals of local control box and No. 7 connection terminals of low pressure screen simultaneously, by power supply L1 through fuse FU1, stop button SB1, the 5th connection terminal of local control box, A.C. contactor KM often leaves node, the normally closed node of the charged time-delay of auxiliary reclay KA2, auxiliary reclay KA3 in the DCS Long-distance Control screen 1 often opens node, auxiliary reclay KA1 often leaves node, A.C. contactor KM coil keeps the loop to zero line N for A.C. contactor KM coil provides the second transition.This transition keeps the loop to carry out in the transfer process at switch SA, and making is that A.C. contactor KM coil does not have a power failure, and keeps not shutting down of product pump.
Slowly open material delivery side of pump hand valve.Observe the ruuning situation of product pump, if startup and operation are normal, the staff of notice control center triggers auxiliary reclay KA3 by long-range DCS control flow and often opens the node closure, the remote activation product pump; Again switch SA is placed remote location, the control of product pump is transferred to DCS Long-distance Control screen 1 control of control center.
After switch SA places remote location, the coil electricity of auxiliary reclay KA2, the normally opened contact closure that auxiliary reclay KA2 is connected with long-range DCS control flow 1, auxiliary reclay KA3 in the DCS Long-distance Control screen 1 often opens the node closure, the time delay module of auxiliary reclay KA2 picks up counting simultaneously, the normally closed node of the charged time-delay of relay KA2 disconnects after 1～2 second, cuts off not by the transition maintenance loop of switch, shields 1 independent Long-distance Control by the DCS Long-distance Control.
The normally closed time of charged time-delay of auxiliary reclay KA2 also can be adjusted to 0～0.1 second, and the present invention also can the compatible original control method of operation like this.
Claims (1)
1. this locality and Long-distance Control does not shut down conversion method, it is characterized in that: behind local control box starter motor (M), there are two loops to give A.C. contactor (KM) coil power supply, article one, be loop through switch (SA), another is the transition maintenance loop without switch (SA), be converted in the transient process of remote location by local position at switch (SA), switch (SA) is cut to the loop of A.C. contactor (KM) coil power supply, and A.C. contactor (KM) coil keeps loop power supply by transition; After switch to be converted (SA) placed remote location, transition kept the loop to disconnect, and A.C. contactor (KM) coil is finished control mode and do not shut down conversion by the control of DCS Long-distance Control screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610200667A CN100593144C (en) | 2006-07-07 | 2006-07-07 | Local and remote controlled non-stop conversion method and its circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610200667A CN100593144C (en) | 2006-07-07 | 2006-07-07 | Local and remote controlled non-stop conversion method and its circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101101480A CN101101480A (en) | 2008-01-09 |
| CN100593144C true CN100593144C (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200610200667A Expired - Fee Related CN100593144C (en) | 2006-07-07 | 2006-07-07 | Local and remote controlled non-stop conversion method and its circuit |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103631193B (en) * | 2013-12-13 | 2016-01-20 | 东北大学 | A kind ofly realize the system and method that equipment control mode concentrates bumpless transfer |
| CN105278473A (en) * | 2014-06-09 | 2016-01-27 | 贵阳铝镁设计研究院有限公司 | Unattended distribution substation SF6 gas leakage remote monitoring method and device |
| CN104279697A (en) * | 2014-09-28 | 2015-01-14 | 青岛亿联信息科技有限公司 | Refrigerant water control circuit for central air-conditioning unit |
| CN106997187A (en) * | 2016-01-22 | 2017-08-01 | 长沙敏瑞自动化设备有限公司 | A kind of flue gas desulfurization host computer control system |
| CN107544309B (en) * | 2017-09-28 | 2020-07-07 | 中国神华能源股份有限公司 | Control circuit, method and device for tamping vehicle, storage medium and processor |
| CN109510550B (en) * | 2018-12-17 | 2024-01-30 | 安徽海螺集团有限责任公司 | Motor control system of cement kiln flue gas carbon capture system |
| CN110412962B (en) * | 2019-08-30 | 2020-07-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Promotion centralized control system that accuse is many |
| CN115079559A (en) * | 2022-07-07 | 2022-09-20 | 核工业理化工程研究院 | Remote switching control system and method for water chiller |
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| CN101101480A (en) | 2008-01-09 |
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Owner name: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INSTITUTE C Free format text: FORMER OWNER: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. Effective date: 20110523 |
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Free format text: CORRECT: ADDRESS; FROM: 550004 NO. 208, BEIJING ROAD, GUIYANG CITY, GUIZHOU PROVINCE TO: 550081 NO.2, JINZHU ROAD, JINYANG NEW DISTRICT, GUIYANG CITY, GUIZHOU PROVINCE |
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Effective date of registration: 20110523 Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Patentee before: Guiyang Aluminium and Magnesium Design Inst. |
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