CN200968278Y - No-shutdown change-over circuit for local and remote controlling - Google Patents
No-shutdown change-over circuit for local and remote controlling Download PDFInfo
- Publication number
- CN200968278Y CN200968278Y CN 200620200926 CN200620200926U CN200968278Y CN 200968278 Y CN200968278 Y CN 200968278Y CN 200620200926 CN200620200926 CN 200620200926 CN 200620200926 U CN200620200926 U CN 200620200926U CN 200968278 Y CN200968278 Y CN 200968278Y
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- China
- Prior art keywords
- control box
- low pressure
- local control
- terminals
- local
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- Expired - Fee Related
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Abstract
The utility model discloses an operational conversion circuit controlled by the local and the remote and consisting of a DCS remote control screen (1), a low pressure screen (2) and a local control box (3). The conversion switches (SA)of the local control box(3)are three sets of three-position conversion switches. The position sequence of the conversion switches (SA) are overhaul/local/remote. In the low pressure screen(2), one normally open node of the alternating current contactor(KM) is connected sequentially with an electrified normally closed node of a middle electrical relay(KA2)and then is connected between the number 5 terminal of the local control box(3)and the number 7 terminal of the low pressure screen(2). The number 8 terminal of the low pressure screen (2) is connected with the number 6 terminal of the local control box(3). The utility model has a simple and useful method, not only meets the requirements of the operational conversion but also is compatible with the previous operation methods without adding components and cables, and has a good economic efficiency and a flexible usage and simplifies the operations of the technological process.
Description
Technical field
The utility model relates to the change-over circuit of a kind of this locality and telecontrol, particularly a kind of be used for the alumina factory pumping motor local with telecontrol do not shut down change-over circuit.
Background technique
The operation of alumina factory 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 manually-operable, such as the inlet valve of opening material, outlet valve also will be observed the operation of product pump.Present operating process is such: the circuit breaker that low pressure is shielded in (drawer) by the operator at scene closes earlier, again the throw over switch on the local control box is placed local position, open the import manually operated valve of product pump, and then press start button, whether slowly open the outlet manually operated 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, throw over switch on the local control box is placed remote location, notify the staff of control centre then, restart product pump by the long-range DCS control system that is located at control centre again, on-the-spot operator opens manual outlet valve once more.This start-up course is too numerous
Trivial, start product pump twice, also to open and close manually operated valve twice, strengthened working strength of workers, simultaneously also unfavorable to the operation of product pump and motor.
Summary of the invention
The purpose of this utility model is: what a kind of this locality and telecontrol were provided does not shut down change-over circuit.Its method is simply real
With, primary circuit is changed not quite, can reach the requirement of not shutting down conversion, the technological process that also can simplify the operation simultaneously reduces labor strength, prolongs the working life of equipment.
The utility model is to constitute like this: it is made up of DCS telecontrol screen (1), low pressure screen (2) and local control box (3); Throw over switch SA in the local control box (3) is three groups of three-postion switch, the sequence of positions of throw over switch SA is maintenance/this locality/distant place, No. 5 terminals and the low pressure that are connected local control box (3) after one of them of low pressure screen (2) interior A.C. contactor KM often opened node and the normally closed node of charged time-delay of auxiliary reclay KA2 is connected are shielded between No. 7 terminals of (2), and No. 8 terminals that low pressure is shielded (2) are connected with No. 6 terminals of local control box (3).
Not shutting down in the change-over circuit of above-mentioned this locality and telecontrol, 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 telecontrol; No. 5 terminals of local control box (3) connect the end that the stop button SB1 in the local control box (3) is connected with throw over 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 utility model is simple and practical, need not increase components and parts and cable, only primary circuit is done to change slightly
Make, 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 the technological process that can simplify the operation reduces labor strength, prolongs the working life of equipment.
Description of drawings
Fig. 1 is electric control theory figure of the present utility model;
Fig. 2 is original electric control theory figure;
Being labeled as in the accompanying drawing: M-product pump motor, QF-circuit breaker, KM-A.C. contactor, KA2-auxiliary reclay (the normally closed node of charged time-delay), the auxiliary reclay in the KA1-auxiliary reclay, KA3-DCS telecontrol screen, SB1-stop by
Button, SB2-start button, SA-throw over switch, FR-thermorelay, FU1-control circuit fus, the fus in the FU2-DCS telecontrol screen, HL1-overload protection tutorial light, HL2-product pump work indicator light.
Embodiment
Embodiment of the present utility model: it is made up of DCS telecontrol screen (1), low pressure screen (2) and local control box (3); Throw over switch SA in the local control box (3) is three groups of three-postion switch, the sequence of positions of throw over switch SA is maintenance/this locality/distant place, No. 5 terminals and the low pressure that are connected local control box (3) after one of them of low pressure screen (2) interior A.C. contactor KM often opened node and the normally closed node of charged time-delay of auxiliary reclay KA2 is connected are shielded between No. 7 terminals of (2), and No. 8 terminals that low pressure is shielded (2) are 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) is connected with throw over 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 working principle of the utility model circuit and operating process thereof:
Circuit breaker 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 throw over switch, opens the manually operated valve of product pump import.
Start product pump.By the start button SB2 on the local control box (3), power supply L1 is through fus FU1, stop button SB1, throw over 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 tenminal blocks of low pressure screen; A.C. contactor KM is connected the auxiliary node closure of often opening between No. 5 tenminal blocks of local control box and No. 7 tenminal blocks of low pressure screen simultaneously, by power supply L1 through fus FU1, stop button SB1, the 5th tenminal block 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 telecontrol 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 throw over 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 manually operated valve.Observe the runnability of product pump, if startup and operation are normal, the staff of notice control centre triggers auxiliary reclay KA3 by long-range DCS control panel and often opens the node closure, the remote activation product pump; Again throw over switch SA is placed remote location, the control of product pump is transferred to DCS telecontrol screen (1) control of control centre.
After throw over 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 panel 1, auxiliary reclay KA3 in the DCS telecontrol 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 throw over switch, shields (1) telecontrol separately by the DCS telecontrol.
The normally closed time of charged time-delay of auxiliary reclay KA2 also can be adjusted to 0～0.1 second, and the utility model also can the compatible original control method of operation like this.
Claims (3)
- This locality and telecontrol do not shut down change-over circuit, form by DCS telecontrol screen (1), low pressure screen (2) and local control box (3); It is characterized in that: the throw over switch (SA) in the local control box (3) is three groups of three-postion switch, the sequence of positions of throw over switch (SA) is maintenance/this locality/distant place, No. 5 terminals and the low pressure that are connected local control box (3) after one of them of low pressure screen (2) interior A.C. contactor (KM) often opened node and a normally closed node of charged time-delay of auxiliary reclay (KA2) is connected are shielded between No. 7 terminals of (2), and No. 8 terminals that low pressure is shielded (2) are connected with No. 6 terminals of local control box (3).
- 2. this locality according to claim 1 and telecontrol do not shut down change-over circuit; it is characterized in that: 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).
- 3. this locality according to claim 1 and telecontrol do not shut down change-over circuit; it is characterized in that: No. 5 terminals of local control box (3) connect the end that the stop button (SB1) in the local control box (3) is connected with throw over switch (SA), and No. 6 terminals of local control box (3) connect on local control box (3) internal conversion switch (SA) and the long-range movable cursor slide that is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620200926 CN200968278Y (en) | 2006-11-17 | 2006-11-17 | No-shutdown change-over circuit for local and remote controlling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620200926 CN200968278Y (en) | 2006-11-17 | 2006-11-17 | No-shutdown change-over circuit for local and remote controlling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200968278Y true CN200968278Y (en) | 2007-10-31 |
Family
ID=38967848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620200926 Expired - Fee Related CN200968278Y (en) | 2006-11-17 | 2006-11-17 | No-shutdown change-over circuit for local and remote controlling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200968278Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488674B (en) * | 2009-02-16 | 2011-02-02 | 花家定 | Intelligent remote control electrical appliance control box |
| CN102400900A (en) * | 2011-09-28 | 2012-04-04 | 上海高桥捷派克石化工程建设有限公司 | Automatic synchronizer control device based on distributed control system |
| CN113485239A (en) * | 2021-06-22 | 2021-10-08 | 郭恩训 | Finger pressing device and control circuit |
-
2006
- 2006-11-17 CN CN 200620200926 patent/CN200968278Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488674B (en) * | 2009-02-16 | 2011-02-02 | 花家定 | Intelligent remote control electrical appliance control box |
| CN102400900A (en) * | 2011-09-28 | 2012-04-04 | 上海高桥捷派克石化工程建设有限公司 | Automatic synchronizer control device based on distributed control system |
| CN102400900B (en) * | 2011-09-28 | 2014-07-09 | 上海高桥捷派克石化工程建设有限公司 | Automatic synchronizer control device based on distributed control system |
| CN113485239A (en) * | 2021-06-22 | 2021-10-08 | 郭恩训 | Finger pressing device and control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20131117 |