CN202789462U - Undisturbed switching water pump control system - Google Patents
Undisturbed switching water pump control system Download PDFInfo
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- CN202789462U CN202789462U CN 201220155861 CN201220155861U CN202789462U CN 202789462 U CN202789462 U CN 202789462U CN 201220155861 CN201220155861 CN 201220155861 CN 201220155861 U CN201220155861 U CN 201220155861U CN 202789462 U CN202789462 U CN 202789462U
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Abstract
The utility model relates to an undisturbed switching water pump control system comprising a main circuit connected with a controlled water pump motor, and a control circuit used for controlling the main circuit, wherein the control circuit is connected into a power supply through a circuit breaker, and a double-state select switch is arranged on the main circuit. First and second state circuits corresponding to the double-state select switch are connected in parallel, and each state circuit is respectively provided with a time delay relay. Each time delay relay is provided with a time delay off auxiliary contact which is immediately switched on after electrification and switched off after delaying for a set time in the case of outage. The undisturbed switching water pump control system achieves a control mode of mutually switching the water pump motor between concentration and engine local with no stopping just by upgrading electric equipment on the condition that no technique equipment of the water pump system is changed, and conducts starting and stopping operations on an onsite operation box and an HMI (man-machine interface), thereby improving the safety, reliability and manipulation convenience of the water pump system.
Description
Technical field
The utility model relates to a kind of water pump handover control system, can be widely used in the water treatment system that every profession and trade needs continuous firing.
Background technique
To the high industry of water treatment system work sustainable requests, in some system such as the continuous annealing of iron and steel enterprise, zinc-plated, hot rolling, blast furnace and converter, all need circulating water to come the normal operation of cooling equipment guarantee equipment, stop to cause great property loss in case supply water.So, guarantee that the reliability of water treatment system pump working and persistency are the preconditions of the normal operation of whole system.
At present, our water system all is to adopt the PLC system to control.Our water pump may cause because of a variety of causes at scene the interruption that moves, such as outage, fault or the shutdown of PLC but usually; The interruption of communication network; Maintenance and the switching etc. of operator scheme during emergency.Will the normal operation of water treatment system be made a big impact thus, so in the present method, system reliability, persistency and Security all have much room for improvement.
The model utility content
The technical problem that will solve of the present utility model is: overcome above-mentioned technological deficiency, provide a kind of unperturbed to switch control system of water pump, when switching, control system can guarantee the water pump system continuous service, fully improve reliability and the Security of water pump system, be that the maintenance of debugging and pump group facilitates simultaneously, increase the working life of water pump system.
For solving technique scheme, the technical solution adopted in the utility model is:
Unperturbed switches control system of water pump, include the main circuit that is connected with controlled pump motor, and the control loop of controlling described main circuit, wherein, described control loop accesses power supply by circuit breaker, include the on off control module of controlling the startup of motor and stopping with long-range dual mode by on the spot, judge and operation and the fault state indicating module whether indication motor normally moves and the operator scheme selection module that can carry out double mode selection, it is characterized in that described operator scheme selection module is: the dibit selector switch is set on the control loop major loop, control loop and telecontrol loop are in parallel on the spot behind the dibit selector switch, and on corresponding each status circuit a time delay relay are set all behind the dibit selector switch; Each time delay relay all carry one prolong during immediately closed and outage when electric disconnect behind the set time often drive auxiliary contact.
By technique scheme, described on off control module is: the normally-closed contact of series contactor, main disconnector normally opened contact and three-phase thermorelay again after the manual switching on/off circuit that control loop is corresponding on the spot and the long-range switching on/off circuit parallel connection; Manually in the switching on/off circuit, control on the spot time delay relay successively normally-closed contact and the normally opened contact of start button, simultaneously a stop button contact upper contactor normally opened contact in parallel of the stop button on the operated in series case for one; In the long-range switching on/off circuit, a telecontrol time delay relay is connected successively and is exported normally opened contact and the normally-closed contact of slew relay, the simultaneously normally-closed contact of a slew relay upper contactor normally opened contact in parallel of the starting relay of control by PLC.
By technique scheme, be connected in series successively main disconnector and thermorelay after the indicating fault loop of operation and fault state indicating module and the operation/stop to indicate the loop parallel connection; The normally opened contact of the coil series connection main disconnector of the auxiliary reclay in indicating fault loop; Move/stop the normally opened contact of the auxiliary reclay two ends difference series contactor of indicating the loop and the normally opened contact of main disconnector; Operation and fault state indicating module also comprise the pilot lamp loop that shows various running statees, and each pilot lamp loop is in series by an auxiliary reclay and tutorial light; The auxiliary contact of often opening of the auxiliary reclay in indicating fault loop link to each other with the fault indicating lamp loop; Move/stop the auxiliary reclay of indicating the loop often open auxiliary contact respectively with stop pilot lamp loop and link to each other with the run indicator loop.
By technique scheme, the input and output point that system also is provided with under remote status by the PLC system monitors man-machine interface with on off control to motor status.
By technique scheme, described on the spot state be set to the manual control motor with regard to ground mode, remote status is set to the remote mode of manual control and PLC automatic control motor.
By technique scheme, the three-phase electrical source of power in the main circuit is drawn on the circuit breaker of motor control center, and by being connected to motor behind contactor, the thermorelay.
By technique scheme, each relay, contactor, circuit breaker all are arranged on motor control center, selector switch, each button, tutorial light are arranged in the field operation box, and field operation box is linked into motor control center, are connected alternately by control signal between motor control center and the PLC system.
When adopting unperturbed switching control system of water pump to carry out pump motor control, different pump motor control modes is selected in requirement according to the water pump system operation, in water pump when normal operation, adopted remote control water pump motor mode, and PLC is automatically or according to setting process parameter or finishing supervision and on off control to motor status; When the water pump fault, when needing maintenance or on-the-spot emergency start, be chosen in the on the spot control pump motor mode of field operation box operation; Realize that by the time delay relay that arranges respectively under each mode state the non-stop-machine unperturbed of motor switches under two patterns when mutually switching.
In the time of need to switching to regard to ground mode from remote mode the operation water pump, with the dibit selector switch from long-range contact change-over to contact on the spot, when to be the dibit selector switch from long-range contacting switch on the spot contacting, the time delay relay coil of the manual control circuit that status circuit is corresponding on the spot immediately electric, corresponding auxiliary contact are closed immediately, time delay relay coil blackout on the while remote status control circuit, but the time delay relay auxiliary contact after the outage still temporarily remain closed, this moment on the spot, time delay relay normally opened contact on the remote status control circuit, the contactor normally opened contact is in to get electric closed state simultaneously, after remote status control circuit delay time arrives, the time delay relay normally opened contact disconnects, then the remote status circuit disconnects, this moment, status circuit still kept connecting on the spot, then motor and water pump remain running state in the whole handoff procedure, have realized switching from the undisturbed that remote mode switches to regard to ground mode; Such as needs with operation motor and pump from switching to remote mode with regard to ground mode, this moment, the state of dibit selector switch was the Work in Place pattern, namely contacting on the spot need to switch to long-range contacting; Time delay relay coil after switching on the remote status control circuit immediately electric, its auxiliary point is closed immediately, and the time delay relay coil blackout of the manual control circuit that status circuit is corresponding on the spot, but the time delay relay auxiliary contact after the outage still temporarily remain closed, this moment on the spot, time delay relay normally opened contact on the remote status control circuit, the contactor normally opened contact is in to get electric closed state simultaneously, after the state control circuit delay time arrives on the spot, the time delay relay normally opened contact disconnects, then status circuit disconnects on the spot, this moment, the remote status circuit still kept connecting, then motor and water pump remain running state in the whole handoff procedure, have realized switching from the undisturbed that switches to remote mode with regard to ground mode.
With respect to prior art; the utility model is in the situation that does not change any manufacturing equipment of water pump system; the only upgrading by electrical equipment; realized that pump motor is long-range and switch and non-stop-machine control mode mutually on the spot; and at the scene operating box and HMI(man-machine interface) on carry out start stop operation, improved safety reliability and the property convenient for control of water pump system.
In addition; owing to adopt the start and stop of dual output time delay relay control pump motor; the dual-delay relay is in short-term to get electric duty; relay auto-breaking immediately then after startup is finished; prolonged the working life of relay with respect to single relay system of long-time adhesive; the operation that can shut down at PLC simultaneously, still keep water pump under the situation such as network interruption has improved the security and stability of factory's running.
At last; the unperturbed switching function of this control system can be implemented in and carry out long-range/continuous service of operation motor and water pump when switching on the spot; this function persistency for water pump operation under the accident emergency provides assurance; be that the maintenance of debugging and pump group is provided convenience simultaneously; avoided because of long-range/switch on the spot the water pump frequent start-stop that causes; do not shut down directly after the realization plant maintenance and put into operation, reduce the start-stop time to electrical network impact and equipment, increase the working life of equipment.
Description of drawings
Fig. 1 is: the unperturbed that the utility model is implemented switches the control loop circuit diagram of control system of water pump.
Fig. 2 is: the unperturbed that the utility model is implemented switches the main loop circuit figure of control system of water pump.
Fig. 3 is: the utility model unperturbed switches the PLC input signal allocation plan of control system of water pump.
Fig. 4 is: the utility model unperturbed switches the PLC output signal allocation plan of control system of water pump.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, but do not limit the utility model.
Unperturbed of the present utility model switches control system of water pump and is divided into telecontrol and control mode on the spot, different control modes is selected in requirement according to pump, adopt the telecontrol mode when pump is normal generally speaking, PLC is according to technological requirement, automatically determine to start the quantity of pump, when failure of pump, when needing maintenance or on-the-spot emergency start, pump is selected on the spot control mode, realizes that by time delay relay unperturbed switches when mutually switching.
Electric control loop is the hardware environment of whole system.As attached illustrated in figures 1 and 2, its control loop comprises motor M, MCC(Motor Control Center, motor control center) control cabinet, PLC(programmable logic controller (PLC)) cabinet, HMI(man-machine interface), field operation box.Wherein selector switch, button, tutorial light etc. are installed in the field operation box, are convenient at the scene motor be operated and monitor.Selector switch can on the spot, remote operation switches, when failure of pump, when needing maintenance or on-the-spot emergency start, selector switch is threaded to local operation, and this moment, pump was in the on the spot manual state of a control of field operation box operation fully, not affected by any of PLC equipment and program.When selector switch is threaded to remote operation, pump can carry out manual start and stop at HMI, also can select automatic mode at HMI, and automatically start-stop when at the enterprising line operate of HMI, is finished supervision and on off control to motor status by the input and output point of PLC.The electrical controls such as circuit breaker, contactor, thermorelay, auxiliary reclay and time delay relay and protecting component are installed in the MCC control cabinet, and state signal is sent among the PLC, and remote control signal is sent by PLC.
Each control unit and protecting component effect and annexation are in the accompanying drawing 1～4: Q11 is that major loop circuit breaker, Q12 are the control loop circuit breaker, is responsible for the break-make of control power supply; K11 is contactor, when closed, and pump operation, during disconnection, pump stops; F11 is thermorelay, the motor overheating protection; S11 is selector switch, be control mode on the spot when selecting 1-2 to connect, be the telecontrol mode by PLC output starting relay K31 and slew relay K32 control when selecting 3-4 to connect this moment, and this moment is by field operation box start button S12 and stop button S13 control; K12, K13 are auxiliary reclay, and the fault of circuit breaker and thermorelay is sent to the operating box tutorial light to the K12 auxiliary point and PLC monitors, and the K13 auxiliary point will move/and stop signal is delivered to the operating box tutorial light and PLC monitors; K14, K15 are time delay relay, respectively carry a time-delay and disconnect auxiliary point, when relay gets when electric, corresponding often to drive auxiliary contact closed immediately, when outage, disconnects behind the contact time-delay certain hour, guaranteed like this in the process of switching, relay is dead electricity, but the auxiliary contact of its correspondence or closure, equipment can keep former running state certain hour; H21, H22, H23 are signaling lamp on the operating box, respectively reflected pump move, stop, fault state.
Figure 1 shows that control loop of the present utility model, two line traffic control power supply (Ac 220V, phase line 1L01, zero line 1L02) be connected to the MCC control cabinet by circuit breaker Q 12, comprise in the MCC control cabinet operation control loop, indicating fault loop, operation indication loop, on the spot/the Remote Selection loop.The Q12 circuit breaker is housed between control loop and the incoming power whole control loop is carried out short circuit and overload protection.Control loop mainly is divided into 3 parts.
(1) on off control part.By controlling the startup of motor with long-range dual mode on the spot and stopping.The normally closed point of the normally opened contact difference serial operation case stop button S13 of time-delay disconnection relay-K14 and the normal battle of start button S12, the normal battle of contactor K11 is as self-insurance in the while S12 parallel connection; The normally opened contact that time-delay disconnects relay-K15 connect respectively the normally closed point of slew relay (PLC output) K32 and starting relay (PLC output) K31 normal battle, the normal battle of contactor K11 is as self-insurance in the while K31 parallel connection.Then the coil of two loop series contactor K11, the normally opened contact of main disconnector Q11, the normally-closed contact of thermorelay F11 more than.
(2) operation and fault state indicating section.The normally opened contact of the coil series connection main disconnector Q11 of auxiliary reclay K12, the normally-closed contact of thermorelay F11, as the judgement of fault state, the auxiliary contact of often opening of K12 are delivered to operating box tutorial light H23 indicating fault status.The normally opened contact of the coil series contactor K11 of auxiliary reclay K13, the normally opened contact of main disconnector Q11, the normally-closed contact of thermorelay F11, judgement as running state, the auxiliary contact of often opening of K13 are delivered to operating box tutorial light H21 indication running state, and the normally closed auxiliary contact of K13 is delivered to operating box tutorial light H22 indication halted state.
(3) operator scheme is selected part.11, two of switch S on the operating box are selected connect respectively on the position time delay relay K14 and K15, as the on the spot selection of control or telecontrol.Such as needs process pump is switched to regard to ground mode from remote mode, then dibit selector switch S11 is switched on the spot from long-range, be that S11 switches to the 1-2 connection from the 3-4 connection, time delay relay K14 coil immediately electric, it is corresponding that often to drive auxiliary contact closed immediately, time delay relay K15 coil blackout still temporarily remains closed but the K15 after the outage often drives auxiliary contact simultaneously, and this moment, normally opened contact, the contactor K11 normally opened contact of K14 and K15 were in to get electric closed state simultaneously.After the K15 delay time arrived, its normally opened contact disconnected, but this moment, K14 still kept connection, and then motor and water pump remain running state in the whole handoff procedure, had realized switching from the undisturbed that remote mode switches to regard to ground mode.
Such as needs with process pump from switching to remote mode with regard to ground mode, then that dibit selector switch S11 is long-range from switching on the spot, time delay relay K15 coil immediately electric, it is corresponding that often to drive auxiliary contact closed immediately, while time delay relay K14 coil blackout, but the auxiliary normally opened contact of the K14 after the outage still temporarily remains closed, and this moment, normally opened contact, the contactor K11 normally opened contact of K14 and K15 were in to get electric closed state simultaneously.After the K14 delay time arrived, its normally opened contact disconnected, but this moment, K15 still kept connection, and then motor and water pump remain running state in the whole handoff procedure, had realized switching from the undisturbed that remote mode switches to regard to ground mode.
Figure 2 shows that main circuit of the present utility model loop, three phase line 1L1,1L2 of three-phase electrical source of power, 1L3 are connected to contactor K11 after by circuit breaker Q 11 and often open main contact, meet down three-phase thermorelay F11 again and provide thermal overload protection to the main circuit loop.
Figure 3 shows that PLC input signal allocation plan of the present utility model, Q11 main disconnector state is often driven auxiliary contact, F11 thermorelay state and is often opened that auxiliary contact often left by auxiliary contact, K11 running state, the K15 telecontrol is often driven auxiliary contact and sent into respectively the PLC load module, for centralized control and the programming of PLC.The auxiliary contact of often opening of Q12 connect L+ and each passage, then cut off all signals when Q12 disconnects.
Figure 4 shows that PLC output signal allocation plan of the present utility model, the auxiliary reclay that K31 starts for control, the auxiliary reclay that K32 stops for control.The auxiliary contact of often opening of the normally closed auxiliary contact of K32 and K31 all are connected in " remote activation/stop " loop of Fig. 1, stop as startup that controlling water pump under the remote status.
Above disclosed only is preferred embodiment of the present utility model; certainly can not limit with this interest field of the utility model; therefore the equivalence of doing according to the utility model claim changes, and still belongs to protection domain of the present utility model such as change and the improvement that process parameter or device are made.
Claims (8)
1. unperturbed switches control system of water pump, include the main circuit that is connected with controlled pump motor, and the control loop of controlling described main circuit, wherein, described control loop accesses power supply by circuit breaker, include the on off control module of controlling the startup of motor and stopping with long-range dual mode by on the spot, judge and operation and the fault state indicating module whether indication motor normally moves and the operator scheme selection module that can carry out double mode selection, it is characterized in that described operator scheme selection module is: the dibit selector switch is set on the control loop major loop, control loop and telecontrol loop are in parallel on the spot behind the dibit selector switch, and on corresponding each status circuit a time delay relay are set all behind the dibit selector switch; Each time delay relay all carry one prolong during immediately closed and outage when electric disconnect behind the set time often drive auxiliary contact.
2. unperturbed according to claim 1 switches control system of water pump, and it is characterized in that: described on off control module is: the normally-closed contact of series contactor, main disconnector normally opened contact and three-phase thermorelay again after the manual switching on/off circuit that control loop is corresponding on the spot and the long-range switching on/off circuit parallel connection; Manually in the switching on/off circuit, control on the spot time delay relay successively normally-closed contact and the normally opened contact of start button, simultaneously a stop button contact upper contactor normally opened contact in parallel of the stop button on the operated in series case for one; In the long-range switching on/off circuit, a telecontrol time delay relay is connected successively and is exported normally opened contact and the normally-closed contact of slew relay, the simultaneously normally-closed contact of a slew relay upper contactor normally opened contact in parallel of the starting relay of control by PLC.
3. unperturbed according to claim 1 and 2 switches control system of water pump, it is characterized in that: be connected in series successively main disconnector and thermorelay after the indicating fault loop of operation and fault state indicating module and the operation/stop to indicate the loop parallel connection; The normally opened contact of the coil series connection main disconnector of the auxiliary reclay in indicating fault loop; Move/stop the normally opened contact of the auxiliary reclay two ends difference series contactor of indicating the loop and the normally opened contact of main disconnector; Operation and fault state indicating module also comprise the pilot lamp loop that shows various running statees, and each pilot lamp loop is in series by an auxiliary reclay and tutorial light; The auxiliary contact of often opening of the auxiliary reclay in indicating fault loop link to each other with the fault indicating lamp loop; Move/stop the auxiliary reclay of indicating the loop often open auxiliary contact respectively with stop pilot lamp loop and link to each other with the run indicator loop.
4. unperturbed according to claim 1 and 2 switches control system of water pump, it is characterized in that: operation and fault state indicating module also comprise the pilot lamp loop that shows various running statees, and each pilot lamp loop is in series by an auxiliary reclay and tutorial light; The auxiliary contact of often opening of the auxiliary reclay in indicating fault loop link to each other with the fault indicating lamp loop; Move/stop the auxiliary reclay of indicating the loop often open auxiliary contact respectively with stop pilot lamp loop and link to each other with the run indicator loop.
5. unperturbed according to claim 3 switches control system of water pump, it is characterized in that: the input and output point that system also is provided with under remote status by the PLC system monitors man-machine interface with on off control to motor status.
According to claim 1 and 2 or 5 described unperturbeds switch control system of water pump, it is characterized in that: described on the spot state be set to the manual control motor with regard to ground mode, remote status is set to the remote mode of manual control and PLC automatic control motor.
7. unperturbed according to claim 6 switches control system of water pump, and it is characterized in that: the three-phase electrical source of power in the main circuit is drawn on the circuit breaker of motor control center, and by being connected to motor behind contactor, the thermorelay.
According to claim 1 and 2 or 5 or 7 described unperturbeds switch control system of water pump, it is characterized in that: each relay, contactor, circuit breaker all are arranged on motor control center, selector switch, each button, tutorial light are arranged in the field operation box, field operation box is linked into motor control center, is connected alternately by control signal between motor control center and the PLC system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155861 CN202789462U (en) | 2012-04-13 | 2012-04-13 | Undisturbed switching water pump control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155861 CN202789462U (en) | 2012-04-13 | 2012-04-13 | Undisturbed switching water pump control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789462U true CN202789462U (en) | 2013-03-13 |
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ID=47816734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220155861 Expired - Fee Related CN202789462U (en) | 2012-04-13 | 2012-04-13 | Undisturbed switching water pump control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635542A (en) * | 2012-04-13 | 2012-08-15 | 中冶南方工程技术有限公司 | Undisturbed switching water pump control system |
-
2012
- 2012-04-13 CN CN 201220155861 patent/CN202789462U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635542A (en) * | 2012-04-13 | 2012-08-15 | 中冶南方工程技术有限公司 | Undisturbed switching water pump control system |
| CN102635542B (en) * | 2012-04-13 | 2015-09-30 | 中冶南方工程技术有限公司 | No-harass switch control system of water pump |
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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: 20130313 Termination date: 20140413 |