CN207813885U - A kind of double water pump failure automatic switch-over circuit - Google Patents

Abstract

The utility model discloses a kind of double water pump failure automatic switch-over circuit, including one control circuit of water pump in parallel, two control circuit of water pump, one faulty circuit one of water pump, one faulty circuit two of water pump, water pump one connect circuit, water pump two connects circuit, two faulty circuit two of two faulty circuit one of water pump and water pump.The utility model has the beneficial effects that high degree of automation, reserve pump is automatically switched to when ensure that a fault of water pump, the equipment downtime caused by fault of water pump all the way is avoided, the normal operation of equipment is ensure that, improves production efficiency.

Description

A kind of double water pump failure automatic switch-over circuit

Technical field

The utility model is related to technical field of electric control, more particularly to a kind of double water pump failure automatic switch-over circuit.

Background technology

The existing handpiece Water Chilling Units for being equipped with double water pump, enter shutdown when excessive low water level protection or water pump overload protection occur for unit State after need to manually debugging or switch water pump, restarts unit, double this requires having under unattended state The handpiece Water Chilling Units of water pump automatically switch reserve pump work when one water pump breaks down.

Utility model content

Above-mentioned in order to solve the problems, such as, the utility model discloses a kind of double water pump failure automatic switch-over circuit, packets Containing one control circuit of water pump in parallel, two control circuit of water pump, one faulty circuit one of water pump, one faulty circuit two of water pump, water pump One connection circuit, water pump two connect circuit, two faulty circuit two of two faulty circuit one of water pump and water pump, and the water pump one controls electricity Road includes start button one, stop button one, time relay normally closed contact one, ac contactor coil one, indicator light one, hands over Flow the normally opened auxiliary contact one of contactor, time relay normally open contact one, electrothermal relay auxiliary normally opened contact one, the time relay Coil one and flow measuring valve one, the normally opened auxiliary contact one of the start button one, the A.C. contactor and the time Relay normally open contact is unified into circuit one, the stop button one, the time relay normally closed contact one and the friendship together Stream contactor coil one is connected into circuit two, a string of the electrothermal relay auxiliary normally opened contact one and the time relay coil It is unified into circuit three, circuit two, the indicator light one and circuit three are simultaneously unified into circuit four, and circuit one is connected with circuit four, the stream It is in parallel with electrothermal relay auxiliary normally opened contact one to measure detection switch one, two control circuit of the water pump includes start button two, stops Only the normally opened auxiliary of button two, time relay normally closed contact two, ac contactor coil two, indicator light two, A.C. contactor is touched Point two, time relay normally open contact two, electrothermal relay auxiliary normally opened contact two, time relay coil two and flow detection are opened Pass two, the normally opened auxiliary contact two of the start button two, A.C. contactor and time relay normally open contact two are simultaneously unified into circuit Five, the stop button two, time relay normally closed contact two and ac contactor coil two are connected into circuit six, the heat after Electric appliance assists normally opened contact two and time relay coil two to be connected into circuit seven, circuit six, the indicator light two and circuit seven Parallel connection is in circuit eight, and circuit five is connected with circuit eight, and the flow measuring valve two assists normally opened contact two simultaneously with electrothermal relay Connection, one faulty circuit one of the water pump include concatenated flow detection switch normally-closed contact one, electrothermal relay auxiliary normally-closed contact One and intermediate relay coil one, one faulty circuit two of the water pump includes concatenated intermediate relay normally opened contact one and instruction Lamp three, it includes concatenated water pump one, electrothermal relay coil one and A.C. contactor main contacts one, institute that the water pump one, which connects circuit, It includes concatenated water pump two, electrothermal relay main coil two and A.C. contactor main contacts two, the water to state water pump two and connect circuit Pump two faulty circuits one include concatenated flow detection switch normally-closed contact two, electrothermal relay auxiliary normally-closed contact two and it is intermediate after Electric apparatus coil two, two faulty circuit two of the water pump includes concatenated intermediate relay normally opened contact two and indicator light four, described Ac contactor coil one controls A.C. contactor main contacts one and the normally opened auxiliary contact one of A.C. contactor, the ac contactor Device coil two controls A.C. contactor main contacts two and the normally opened auxiliary contact two of A.C. contactor, the time relay coil one Control time relay normally closed contact one and time relay normally open contact two, two control time of the time relay coil after Electric appliance normally-closed contact two and the time relay normally open contact one, it is normal that the intermediate relay coil one controls intermediate relay Contact one is opened, the intermediate relay coil two controls intermediate relay normally opened contact two, and the electrothermal relay auxiliary is normally opened to be touched Point one and electrothermal relay assist the normally-closed contact one, flow measuring valve one and flow detection switch normally-closed contact one, described The electrothermal relay auxiliary normally opened contact two and electrothermal relay auxiliary normally-closed contact two and the flow measuring valve two and flow The folding condition of detection switch normally-closed contact two on the contrary, the start button one and start button second is that moving normal open switch, institute in wink Stop button one and stop button are stated second is that wink moves normally closed switch.

The utility model has the beneficial effects that high degree of automation, automatically switches to spare when ensure that a fault of water pump Water pump avoids the equipment downtime caused by fault of water pump all the way, ensure that the normal operation of equipment, improves production efficiency.

Description of the drawings

Fig. 1 is the electrical schematic diagram of the utility model；

In figure：1, one control circuit of water pump, 10, start button one, 11, stop button one, 12, the time relay are normally closed touches The normally opened auxiliary contact of point one, 13, ac contactor coil one, 14, indicator light one, 15, A.C. contactor one, 16, time relay Device normally opened contact one, 17, electrothermal relay assist normally opened contact one, 18, time relay coil one, 19, flow measuring valve one, 2, two control circuit of water pump, 20, start button two, 21, stop button two, 22, time relay normally closed contact two, 23, exchange The normally opened auxiliary contact of contactor coil two, 24, indicator light two, 25, A.C. contactor two, 26, time relay normally open contact two, 27, electrothermal relay assist normally opened contact two, 28, time relay coil two, 29, flow measuring valve two, 3, one failure of water pump Circuit one, 31, flow detection switch normally-closed contact one, 32, intermediate relay coil one, 33, electrothermal relay assist normally-closed contact One, 4, one faulty circuit two of water pump, 41, intermediate relay normally opened contact one, 42, indicator light 35, water pump one connect circuit, 51, A.C. contactor main contacts one, 52, electrothermal relay coil one, 53, water pump one, 6, water pump two connect circuit, 61, A.C. contactor Main contacts two, 62, electrothermal relay main coil two, 63, water pump two, 7, two faulty circuit one of water pump, 71, flow detection switch it is normally closed Contact two, 72, electrothermal relay assist normally-closed contact two, 73, intermediate relay coil 28, two faulty circuit two of water pump, 81, in Between relay normally open contact two, 82, indicator light four.

Specific implementation mode

It elaborates below in conjunction with the accompanying drawings to specific embodiment of the utility model.

As shown in Figure 1, a kind of double water pump failure automatic switch-over circuit, including one control circuit 1 of water pump in parallel, water pump two Control circuit 2, one faulty circuit 1 of water pump, one faulty circuit 24 of water pump, water pump one connect circuit 5, water pump two connects circuit 6, two faulty circuit 28 of two faulty circuit 1 of water pump and water pump, one control circuit 1 of the water pump include start button 1, stop Only button 1, time relay normally closed contact 1, ac contactor coil 1, indicator light 1, A.C. contactor are normal Open auxiliary contact 1, time relay normally open contact 1, electrothermal relay auxiliary normally opened contact 1, time relay coil One 18 and flow measuring valve 1, normally opened auxiliary contact 1 of the start button 1, the A.C. contactor and described Time relay normally open contact 1 is simultaneously unified into circuit one, the stop button 1, the time relay normally closed contact one 12 and the ac contactor coil 1 be connected into circuit two, the electrothermal relay auxiliary normally opened contact 1 and the time Relay coil 1 is connected into circuit three, and circuit two, the indicator light 1 and circuit three are simultaneously unified into circuit four, circuit one with Circuit four is connected, and the flow measuring valve 1 is in parallel with electrothermal relay auxiliary normally opened contact 1, and the water pump two controls Circuit 2 include start button 2 20, stop button 2 21, time relay normally closed contact 2 22, ac contactor coil 2 23, The normally opened auxiliary contact 2 25 of indicator light 2 24, A.C. contactor, time relay normally open contact 2 26, electrothermal relay auxiliary are normally opened Contact 2 27, time relay coil 2 28 and flow measuring valve 2 29, the start button 2 20, A.C. contactor are normally opened Auxiliary contact 2 25 and time relay normally open contact 2 26 are simultaneously unified into circuit five, the stop button 2 21, the time relay Normally-closed contact 2 22 and ac contactor coil 2 23 are connected into circuit six, the electrothermal relay auxiliary normally opened contact 2 27 and when Between relay coil 2 28 be connected into circuit seven, circuit six, the indicator light 2 24 and circuit seven it is in parallel be in circuit eight, circuit five It connects with circuit eight, the flow measuring valve 2 29 is in parallel with electrothermal relay auxiliary normally opened contact 2 27, one event of the water pump Hinder circuit 1 include concatenated flow detection switch normally-closed contact 1, electrothermal relay auxiliary normally-closed contact 1 and it is intermediate after Electric apparatus coil 1, one faulty circuit 24 of the water pump include concatenated intermediate relay normally opened contact 1 and indicator light three 42, it includes concatenated water pump 1, electrothermal relay coil 1 and A.C. contactor main contacts one that the water pump one, which connects circuit 5, 51, it includes concatenated water pump 2 63, electrothermal relay main coil 2 62 and A.C. contactor main contacts that the water pump two, which connects circuit 6, 2 61, two faulty circuit 1 of the water pump is normally closed comprising concatenated flow detection switch normally-closed contact 2 71, electrothermal relay auxiliary Contact 2 72 and intermediate relay coil 2 73, two faulty circuit 28 of the water pump, which includes that concatenated intermediate relay is normally opened, to be touched Point 2 81 and indicator light 4 82, the ac contactor coil 1 control A.C. contactor main contacts 1 and A.C. contactor Normally opened auxiliary contact 1, the ac contactor coil 2 23 controls A.C. contactor main contacts 2 61 and A.C. contactor is normal Auxiliary contact 2 25 are opened, one 18 control time relay normally closed contact 1 of the time relay coil and the time relay are normal Contact 2 26 is opened, 2 28 control time relay normally closed contact 2 22 of the time relay coil and the time relay are normal Contact 1 is opened, the intermediate relay coil 1 controls intermediate relay normally opened contact 1, the intermediate relay line 2 73 control intermediate relay normally opened contacts 2 81 are enclosed, the electrothermal relay auxiliary normally opened contact 1 and electrothermal relay auxiliary are normal Closed contact 1, the flow measuring valve 1 and flow detection switch normally-closed contact 1, the electrothermal relay are auxiliary Normally opened contact 2 27 is helped to assist normally-closed contact 2 72 and the flow measuring valve 2 29 and flow detection switch with electrothermal relay The folding condition of normally-closed contact 2 71 is described on the contrary, the start button 1 and start button 2 20 are to move normal open switch wink Stop button 1 and stop button 2 21 are to move normally closed switch in wink.

Flow detection switch normally-closed contact 1 and electrothermal relay auxiliary normally-closed contact 1 are normally off, intermediate relay Device normally opened contact 1 is normally open, and intermediate relay coil 1 must be electric, and indicator light 3 42 does not work.

In pumping a control circuit 1, start button 1 is pressed, ac contactor coil 1 obtains electric so that exchange connects Tentaculum main contacts 1 and the normally opened auxiliary contact 1 of A.C. contactor are closed, and stop button 1 and the time relay are normally closed tactile Point 1 is normally off, and time relay normally open contact 1, electrothermal relay auxiliary normally opened contact 1 and flow detection are opened It is normally open to close 1, and water pump 1 brings into operation, and indicator light 1 is bright.

When needing to stop the operation of water pump 1, stop button 1 is pressed, stop button 1 is made to disconnect, exchange connects Tentaculum coil 1 cannot obtain electric so that A.C. contactor main contacts 1 and the normally opened auxiliary contact 1 of A.C. contactor are disconnected It opens, water pump 1 is out of service, and indicator light 1 does not work.

When the flow of water pump 1 in the process of running breaks down, flow measuring valve 1 is closed automatically, flow Detection switch normally-closed contact 1 disconnects, and intermediate relay coil 1 must not be electric, and intermediate relay normally opened contact 1 is closed, Indicator light 3 42 is bright, and while flow measuring valve 1 is closed, time relay coil 1 must be electric, and the time relay is normally closed Contact 1 disconnects, while the time relay normally open contact 2 26 in two control circuit 2 of water pump is closed.The time relay is normally closed Contact 1 disconnects, and ac contactor coil 1 cannot obtain electric, and A.C. contactor main contacts 1 and A.C. contactor are normally opened Auxiliary contact 1 disconnect, and water pump 1 is out of service.Time relay normally open contact 2 26 be closed, stop button 2 21 and when Between relay normally closed contact 2 22 be normally off, ac contactor coil 2 23 it is electric so that A.C. contactor main contacts two 61 and the normally opened auxiliary contact 2 25 of A.C. contactor be closed, electrothermal relay assists normally opened contact 2 27 and flow measuring valve 2 29 For normally open, indicator light 2 24 is bright, and water pump 2 63 brings into operation.

When stall or idle running occurs in the process of running in water pump 1, electrothermal relay auxiliary normally opened contact 1 closes It closes, electrothermal relay assists normally-closed contact 1 to disconnect, and the identical indicator light 3 42 of principle when breaking down with flow is bright, hot relay While device assists normally opened contact 1 to be closed, time relay coil 1 must be electric, and time relay normally closed contact 1 is disconnected It opens, the time relay normally open contact 2 26 in two control circuit 2 of water pump is closed, and time relay normally closed contact 1 disconnects, Ac contactor coil 1 cannot obtain electric, and A.C. contactor main contacts 1 and the normally opened auxiliary contact 1 of A.C. contactor are disconnected It opens, water pump 1 is out of service.Time relay coil 1 obtains electric so that time relay normally open contact 2 26 is closed, and is stopped Only button 2 21 and time relay normally closed contact 2 22 are normally off, and ac contactor coil 2 23 obtains electric, ac contactor Device main contacts 2 61 and the normally opened auxiliary contact 2 25 of A.C. contactor are closed, and electrothermal relay assists normally opened contact 2 27 and flow inspection Slowdown monitoring switch 2 29 is normally open, and indicator light 2 24 is bright, and water pump 2 63 brings into operation.

When the flow of water pump 2 63 in the process of running breaks down, flow measuring valve 2 29 is closed automatically, flow Detection switch normally-closed contact 2 71 disconnects, and intermediate relay coil 2 73 must not be electric, and intermediate relay normally opened contact 2 81 is closed, Indicator light 4 82 is bright, and while flow measuring valve 2 29 is closed, time relay coil 2 28 must be electric, and the time relay is normally closed Contact 2 22 disconnects, and ac contactor coil 2 23 cannot obtain electric, and A.C. contactor main contacts 2 61 and A.C. contactor are normally opened Auxiliary contact 2 25 disconnect, and water pump 2 63 is out of service.Time relay normally open contact 1 be closed, stop button 1 and when Between relay normally closed contact 1 be normally off, ac contactor coil 1 it is electric so that A.C. contactor main contacts one 51 and the normally opened auxiliary contact 1 of A.C. contactor be closed, flow measuring valve 1 and electrothermal relay assist normally opened contact 1 For normally open, indicator light 1 is bright, and water pump 1 brings into operation.

When stall or idle running occurs in the process of running in water pump 2 63, electrothermal relay auxiliary normally opened contact 2 27 closes It closes, electrothermal relay assists normally-closed contact 2 72 to disconnect, and the identical indicator light 4 82 of principle when breaking down with flow is bright, hot relay While device assists normally opened contact 2 27 to be closed, time relay coil 2 28 must be electric, and time relay normally closed contact 2 22 is disconnected It opens, the time relay normally open contact 1 in one control circuit 1 of water pump is closed, and time relay normally closed contact 2 22 disconnects, Ac contactor coil 2 23 cannot obtain electric, and A.C. contactor main contacts 2 61 and the normally opened auxiliary contact 2 25 of A.C. contactor are disconnected It opens, water pump 2 63 is out of service.Time relay coil 2 28 obtains electric so that time relay normally open contact 1 is closed, and is stopped Only button 1 and time relay normally closed contact 1 are normally off, and ac contactor coil 1 obtains electric so that exchange Contactor main contacts 1 and the normally opened auxiliary contact 1 of A.C. contactor are closed, and flow measuring valve 1 and electrothermal relay are auxiliary It is normally open to help normally opened contact 1, and indicator light 1 is bright, and water pump 1 brings into operation.

Claims (1)

1. a kind of double water pump failure automatic switch-over circuit, which is characterized in that include one control circuit of water pump in parallel（1）, water pump Two control circuits（2）, one faulty circuit one of water pump（3）, one faulty circuit two of water pump（4）, water pump one connect circuit（5）, water pump Two connection circuits（6）, two faulty circuit one of water pump（7）With two faulty circuit two of water pump（8）, one control circuit of the water pump（1） Including start button one（10）, stop button one（11）, time relay normally closed contact one（12）, ac contactor coil one （13）, indicator light one（14）, the normally opened auxiliary contact of A.C. contactor one（15）, time relay normally open contact one（16）, heat after Electric appliance assists normally opened contact one（17）, time relay coil one（18）With flow measuring valve one（19）, the start button One（10）, the normally opened auxiliary contact of the A.C. contactor one（15）With the time relay normally open contact one（16）And it is unified into electricity Lu Yi, the stop button one（11）, the time relay normally closed contact one（12）With the ac contactor coil one （13）It is connected into circuit two, the electrothermal relay assists normally opened contact one（17）With the time relay coil one（18）Series connection At circuit three, circuit two, the indicator light one（14）With circuit three and be unified into circuit four, circuit one is connected with circuit four, described Flow measuring valve one（19）Normally opened contact one is assisted with electrothermal relay（17）Parallel connection, two control circuit of the water pump（2）Including Start button two（20）, stop button two（21）, time relay normally closed contact two（22）, ac contactor coil two（23）、 Indicator light two（24）, the normally opened auxiliary contact of A.C. contactor two（25）, time relay normally open contact two（26）, electrothermal relay it is auxiliary Help normally opened contact two（27）, time relay coil two（28）With flow measuring valve two（29）, the start button two（20）、 The normally opened auxiliary contact of A.C. contactor two（25）With time relay normally open contact two（26）And it is unified into circuit five, the stopping is pressed Button two（21）, time relay normally closed contact two（22）With ac contactor coil two（23）Be connected into circuit six, the heat after Electric appliance assists normally opened contact two（27）With time relay coil two（28）It is connected into circuit seven, circuit six, the indicator light two （24）In parallel with circuit seven is in circuit eight, and circuit five is connected with circuit eight, the flow measuring valve two（29）With electrothermal relay Assist normally opened contact two（27）Parallel connection, one faulty circuit one of the water pump（3）Including concatenated flow detection switch normally-closed contact One（31）, electrothermal relay assist normally-closed contact one（33）With intermediate relay coil one（32）, one faulty circuit two of the water pump （4）Including concatenated intermediate relay normally opened contact one（41）With indicator light three（42）, the connection circuit of the water pump one（5）Including Concatenated water pump one（53）, electrothermal relay coil one（52）With A.C. contactor main contacts one（51）, the water pump two connects electricity Road（6）Including concatenated water pump two（63）, electrothermal relay main coil two（62）With A.C. contactor main contacts two（61）, the water Pump two faulty circuits one（7）Including concatenated flow detection switch normally-closed contact two（71）, electrothermal relay assist normally-closed contact two （72）With intermediate relay coil two（73）, two faulty circuit two of the water pump（8）It is touched including concatenated intermediate relay is normally opened Point two（81）With indicator light four（82）, the ac contactor coil one（13）Control A.C. contactor main contacts one（51）And friendship Flow the normally opened auxiliary contact of contactor one（15）, the ac contactor coil two（23）Control A.C. contactor main contacts two（61） With the normally opened auxiliary contact of A.C. contactor two（25）, the time relay coil one（18）Control time relay normally closed contact One（12）With time relay normally open contact two（26）, the time relay coil two（28）Control time relay is normally closed to be touched Point two（22）With the time relay normally open contact one（16）, the intermediate relay coil one（32）Control intermediate relay Normally opened contact one（41）, the intermediate relay coil two（73）Control intermediate relay normally opened contact two（81）, it is described heat after Electric appliance assists normally opened contact one（17）Normally-closed contact one is assisted with electrothermal relay（33）, the flow measuring valve one（19）With water Flow detection switch normally-closed contact one（31）, the electrothermal relay assist normally opened contact two（27）It is assisted with electrothermal relay normally closed Contact two（72）With the flow measuring valve two（29）With flow detection switch normally-closed contact two（71）Folding condition on the contrary, The start button one（10）With start button two（20）It is to move normal open switch, the stop button one in wink（11）And stop button Two（21）It is to move normally closed switch in wink.