CN218816905U - Double-pump alternate start-stop and protection control circuit for sewage pool - Google Patents
Double-pump alternate start-stop and protection control circuit for sewage pool Download PDFInfo
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- CN218816905U CN218816905U CN202223071038.7U CN202223071038U CN218816905U CN 218816905 U CN218816905 U CN 218816905U CN 202223071038 U CN202223071038 U CN 202223071038U CN 218816905 U CN218816905 U CN 218816905U
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Abstract
The utility model discloses a double-pump alternate start-stop and protection control circuit for a sewage pool, which comprises a three-phase four-wire power supply, wherein the phase line end of the three-phase four-wire power supply is connected to a main circuit breaker; the output end of the main breaker is connected with two first branch breakers in parallel; the output end of each first branch breaker is connected to a water pump motor through a soft starter; the phase line and the zero line are connected to the input end of the switching power supply through a second branch breaker; still include the fault control return circuit, manual control return circuit, soft starter starting circuit and PLC module, the utility model discloses a sewage pond opens in turn to open and stops and protect control circuit with the double pump, can be according to the operation requirement of on-the-spot difference, under the condition that does not increase hardware facilities, through change PLC control flow, the adjustment double pump opens and stops, control mode, realizes the operation under the different operating mode conditions.
Description
Technical Field
The utility model particularly relates to a bilge pit opens in turn with two pumps and stops and protect control circuit belongs to the water pump and opens and stop circuit technical field.
Background
At present, a sewage pool adopts a single-pump or double-pump mode to lift and drain sewage, the adopted electric start-stop and protection control modes are more, pure contactor type control, integrated single chip microcomputer control, intelligent controller control and the like are adopted, liquid level signals are collected by a sensor, and automatic control and alternate control of high liquid level and low liquid level are realized; the control mode has the following defects: 1. the pure contactor type controls the start and stop, although the investment is the least and the structure is simple, the contactor needs to be frequently attracted and released due to the limitation of the working principle, the performance is unstable, sparks are easily generated in the working process, and the using place has limitation; 2. the control of a single chip microcomputer and the control of an intelligent controller are integrated, the automation degree is high, but the program is written once according to the control requirement, if the operation, control and protection modes of the double pumps are adjusted in the later period, the program cannot be changed, the controller needs to be changed again, the investment is high, and the flexibility is poor in the using process; in the using process, the phenomena of unstable performance and high water level without starting the pump exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a bilge pit is with double pumps open in turn and stop and protection control circuit can open and stop, control mode, realize the operation under the different operating condition through change PLC control flow, adjustment double pump under the condition that does not increase hardware facilities according to the operation requirement of scene difference.
The utility model discloses a sewage pond is with two pump opening in turn and is opened and stop and protection control circuit, adopts siemens PLC-200 to control, realizes opening and stopping of two pumps; an electrical control and protection loop is designed, a manual and automatic control button is arranged on a panel of a control cabinet, and in order to ensure the safe operation of the double pumps, the water pumps are provided with the functions of overload protection, no-load protection, over-under voltage protection, open-phase protection and short-circuit protection; setting a PLC-200 control flow, and realizing automatic control by detecting the sudden change edge of a float ball liquid level switching value signal; in an automatic state, the pumps are stopped at a low water level, 1 pump is started when the low water level detects a pump starting signal, and 2 pumps are started simultaneously when the high water level detects the pump starting signal; the double-pump mode switching function is realized through the PLC, namely two pumps can be started in turn, and if 1 pump fails, the other 1 pump can be automatically switched to automatically control the operation; under the manual state realized by hardware control, the pumps are started and stopped without being controlled by the liquid level of the floating ball, and the pumps are started and stopped by a panel button; according to the function requirements, the control flow is flexibly modified, and the control and protection functions of the double pumps are realized; the method comprises the following steps:
the three-phase four-wire power supply comprises a three-phase four-wire power supply, wherein a phase wire end of the three-phase four-wire power supply is connected to a main circuit breaker; the output end of the main breaker is connected with two first branch breakers in parallel; the output end of each first branch breaker is connected to a water pump motor through a soft starter; the phase line and the zero line are connected to the input end of the switching power supply through a second branch breaker; a surge protector is connected between the second branch breaker and the switching power supply in parallel; the output end of the switch power supply is connected to the power end of the water leakage overheat protector and the power end of the soft starter; the collecting end of the water leakage overheat protector is connected with a sensor in the pump body of the water pump;
a fault control loop; the fault control loop comprises a third relay and a fourth relay; coil ends of the third relay and the fourth relay are respectively connected to a fault output end and a ground end of the two soft starters; the first normally open ends of the third relay and the fourth relay are connected with the output end of the switching power supply through the fault indicating lamp;
the manual control circuit comprises an emergency stop button connected with a power supply end of the switch in series; the other end of the emergency stop button is connected with a first stop button and a second stop button in parallel; the other end of the first stop button is connected with a first start button, a third intermediate relay normally-closed end, a fifth intermediate relay coil end and a ground end in series; the other end of the second stop button is connected with a second start button, a fourth intermediate relay normally-closed end, a sixth intermediate relay coil end and a ground end in series; the normally open end of the fifth intermediate relay is connected in parallel with the two ends of the first starting button; the sixth intermediate relay normally-opened end is connected in parallel with the two ends of the second starting button; the third intermediate relay coil and the fourth intermediate relay coil are respectively connected to a switch power supply end through a normally open end of the water leakage overheat protector;
a soft starter starting circuit; the starting ends of the two soft starters are respectively connected with a fifth intermediate relay normally-opened end and a sixth intermediate relay normally-opened end; the two ends of the normally open end of the fifth intermediate relay are connected with the normally open end of the first intermediate relay in parallel; the two ends of the normally open end of the sixth intermediate relay are connected with the normally open end of the second intermediate relay in parallel; coil ends of the first intermediate relay and the second intermediate relay are connected to the PLC;
and the acquisition port of the PLC module is respectively connected with a third relay normally-open end, a fourth relay normally-open end, a low water level liquid level switch, a high water level liquid level switch and two soft starter feedback ends.
Further, a main current transformer is arranged at the output end of the main circuit breaker; a current distribution transformer is arranged between the first branch breaker and the soft starter; the main current transformer and the sub current transformers are connected to the main electric energy meter and the sub electric energy meters.
Further, the PLC module is in communication connection with a remote end through a switch; the PLC module is also connected with a remote/local switching button.
Further, the emergency stop button, the first stop button, the second stop button, the first start button, the second start button, the remote/local switching button, the fault indicator light, the operation indicator light, the power indicator light and the sub electric energy meter are all mounted on the control panel; a touch screen is also fixed on the control panel; the touch screen is electrically connected to the PLC.
Compared with the prior art, the utility model discloses a sewage pond opens in turn with double pump and stops and protect control circuit, has following advantage:
1. the invention can realize the operation under different working conditions by changing the control flow of the PLC and adjusting the starting, stopping and control modes of the double pumps without increasing hardware facilities according to different field use requirements.
2. The invention realizes the automatic control function by detecting the change of the float ball switching value, systematically considers some fault factors in operation, such as 1 pump failure, partial external linkage failure and the like, and has higher safety of an electrical system and a control program.
3. The normal protection and the running state of the water pump are connected into the PLC, so that the detection is convenient to implement, and the unattended operation can be realized.
Drawings
Fig. 1 is the utility model discloses a water pump motor owner power module structure schematic diagram.
Fig. 2 is a schematic structural diagram of the first soft starter set of the present invention.
Fig. 3 is a schematic structural diagram of the second group soft starter of the present invention.
Fig. 4 is a schematic structural view of the first group of water leakage overheat protectors of the present invention.
Fig. 5 is a schematic structural view of the second group of leakage overheat protectors of the present invention.
Fig. 6 is the connection schematic diagram of the fault control circuit and the liquid level switch of the present invention.
Fig. 7 is a schematic diagram of the structure of the manual control circuit of the present invention.
Fig. 8 is the utility model discloses a main electric energy meter and current transformer mounting structure schematic diagram.
Fig. 9 is a schematic diagram of the local connection structure of the PLC module of the present invention.
Fig. 10 is a schematic view of the arrangement structure of the control panel according to the present invention.
Fig. 11 is a schematic diagram of the arrangement structure of the modules of the present invention.
Fig. 12 is a schematic diagram of the arrangement structure of the modules according to the present invention.
Detailed Description
Example 1:
the sewage pool alternate start-stop and protection control circuit shown in fig. 1 to 12 adopts a siemens PLC-200 to control so as to realize the start-stop of the double pumps; an electrical control and protection loop is designed, a manual and automatic control button is arranged on a panel of a control cabinet, and in order to ensure the safe operation of the double pumps, the water pumps are provided with the functions of overload protection, no-load protection, over-under voltage protection, open-phase protection and short-circuit protection; setting a PLC-200 control flow, and realizing automatic control by detecting the sudden change edge of a float ball liquid level switching value signal; in an automatic state, the pumps are stopped at a low water level, 1 pump is started when the low water level detects a pump starting signal, and 2 pumps are started simultaneously when the high water level detects the pump starting signal; the double-pump mode switching function is realized through the PLC, namely two pumps can be started in turn, and if 1 pump fails, the other 1 pump can be automatically switched to automatically control the operation; under the manual state realized by hardware control, the pumps are started and stopped without being controlled by the liquid level of the floating ball, and the pumps are started and stopped by a panel button; according to the function requirements, the control flow is flexibly modified, and the control and protection functions of the double pumps are realized; the method comprises the following steps:
the three-phase four-wire power supply comprises three-phase four-wire power supplies L1, L2, L3 and N, wherein the phase line end of the three-phase four-wire power supply is connected to a main breaker QF1; the output end of the main breaker QF1 is connected with two first branch breakers QF2 (QF 3) in parallel; the output end of each first branch breaker QF2 (QF 3) is connected to a water pump motor through a soft starter R1 (R2); the phase line L1 and the zero line N are connected to the input end of the switching power supply D through a second branch breaker QF 4; a surge protector B is connected between the second sub breaker QF4 and the switching power supply D in parallel; the output end of the switching power supply D is connected to the power end of a water leakage overheat protector G1 (G2) and the power end of a soft starter R1 (R2); the acquisition end of the water leakage overheating protector G1 (G2) is connected with a sensor in the pump body of the water pump; the three-phase four-wire power supply supplies power to the double pumps, the three-phase four-wire power supply finally supplies power to the water pump motor through the main breaker, the breaking circuit device and the soft starter, and one phase line and the zero line are sent to the switching power supply through the breaking circuit device and are converted into direct current through the switching power supply; supplying power to each control module; the surge protector protects the switching power supply, and the water leakage overheat protector protects the water pump; the soft starter performs soft start on a water pump motor;
a fault control loop; the fault control loop comprises a third relay KA3 and a fourth relay KA4; coil ends of the third relay KA3 and the fourth relay KA4 are respectively connected to a fault output end and a ground end of the two soft starters R1 (R2); the first normally open ends of the third relay KA3 and the fourth relay KA4 are connected with the output end of a switching power supply D in series through a fault indicator lamp HG 3; when the water pump is in fault, the soft starter or the water leakage overheat protector sends a control signal, the normally open end of the corresponding third relay or fourth relay is closed, and the normally closed end is opened; the corresponding fault indicator lamp is electrified and lightened; meanwhile, the PLC module synchronously obtains a fault signal; in addition, the normally closed end connected in series with the manual control loop is disconnected, at the moment, the manual control loop is disconnected, and the soft starter is in a disconnected state; the water pump motor cannot be started.
The manual control loop comprises an emergency stop button SB0 connected to the D end of the switching power supply in series; the other end of the emergency stop button SB0 is connected with a first stop button SB2 and a second stop button SB4 in parallel; the other end of the first stop button SB2 is connected in series with a first start button SB3, a normally closed end of a third intermediate relay KA3, a coil end of a fifth intermediate relay KA5 and a ground end; the other end of the second stop button SB4 is connected in series with a second start button SB4, a normally closed end of a fourth intermediate relay KA4, a coil end of a sixth intermediate relay KA6 and a ground end; the fifth intermediate relay KA5 is normally opened and connected to two ends of the first starting button SB3 in parallel; the sixth intermediate relay KA6 is normally opened and connected to two ends of the second starting button SB4 in parallel; the coil of the third intermediate relay KA3 and the coil of the fourth intermediate relay KA4 are respectively connected to the end D of the switching power supply through the normally open end of the water leakage overheat protector G1 (G2); when the emergency stop button is pressed, the whole control loop is disconnected, and when the first start button or the second start button is pressed; the fifth intermediate relay and the sixth intermediate relay are powered on, the whole manual control loop is switched on and self-locked, and at the moment, the double-pump action can be manually controlled without being controlled by high and low water levels; when the disconnection is needed, the first stop button and the second stop button are pressed; in addition, when a fault occurs, the normally closed end of the third intermediate relay or the normally closed end of the fourth intermediate relay is disconnected, and the whole manual control loop is disconnected;
a soft starter starting circuit; the starting ends of the two soft starters are respectively connected with a fifth intermediate relay KA5 normally-open end and a sixth intermediate relay KA6 normally-open end; the two ends of the normally open end of the fifth intermediate relay KA5 are connected with the normally open end of the first intermediate relay KA1 in parallel; two ends of the normal open end of the sixth intermediate relay KA6 are connected with the normal open end of the second intermediate relay KA2 in parallel; coil ends of the first intermediate relay KA1 and the second intermediate relay KA2 are connected to the PLC;
the PLC module SR20, the acquisition port of the PLC module SR20 is respectively connected with a third relay KA3 normally open end, a fourth relay KA4 normally open end, a low water level liquid level switch, a high water level liquid level switch and two soft starter feedback ends; the PLC module passes through low water level liquid level switch and the cooperation of high water level liquid level switch, when the water level reaches low water level liquid level switch or high water level liquid level switch and detects the liquid level, the PLC module obtains the signal, and give first auxiliary relay and/or second auxiliary relay's coil signal, first auxiliary relay and/or second auxiliary relay get electricity, thereby it is closed to correspond intermediate relay's the end of opening normally, soft starter switch holds and gets electricity, thereby the water pump is by soft start, begin work.
The output end of the main circuit breaker QF1 is provided with main current transformers TA1, TA2 and TA3; a current distribution transformer TA4 (TA 5) is arranged between the first branch breaker QF2 (QF 3) and the soft starter R1 (R2); the main current transformers TA1, TA2 and TA3 and the partial current transformer TA4 (TA 5) are connected to the main electric energy meter A1 and the partial electric energy meter A2 (A3). The PLC module SR20 is in communication connection with a remote end through a switch; the PLC module SR20 is also connected to a remote/local switching button.
The emergency stop button, the first stop button, the second stop button, the first start button, the second start button, the remote/local switching button, the fault indicator lamp, the operation indicator lamp, the power indicator lamp and the sub electric energy meter are all arranged on the control panel; a touch screen is also fixed on the control panel; the touch screen is electrically connected to the PLC.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (4)
1. The utility model provides a bilge pit is with double pump opening in turn and is stopped and protection control circuit which characterized in that: the three-phase four-wire power supply comprises a three-phase four-wire power supply, wherein a phase wire end of the three-phase four-wire power supply is connected to a main circuit breaker; the output end of the main breaker is connected with two first branch breakers in parallel; the output end of each first branch breaker is connected to a water pump motor through a soft starter; the phase line and the zero line are connected to the input end of the switching power supply through a second branch breaker; a surge protector is connected between the second branch breaker and the switching power supply in parallel; the output end of the switch power supply is connected to the power end of the water leakage overheat protector and the power end of the soft starter; the collecting end of the water leakage overheat protector is connected with a sensor in the pump body of the water pump;
a fault control loop; the fault control loop comprises a third relay and a fourth relay; coil ends of the third relay and the fourth relay are respectively connected to a fault output end and a ground end of the two soft starters; the first normally open ends of the third relay and the fourth relay are connected with the output end of the switching power supply through the fault indication lamp;
the manual control circuit comprises an emergency stop button connected in series with a power supply end of the switch; the other end of the emergency stop button is connected with a first stop button and a second stop button in parallel; the other end of the first stop button is connected with a first start button, a third intermediate relay normally-closed end, a fifth intermediate relay coil end and a ground end in series; the other end of the second stop button is connected with a second start button, a fourth intermediate relay normally-closed end, a sixth intermediate relay coil end and a ground end in series; the normally open end of the fifth intermediate relay is connected to two ends of the first starting button in parallel; the sixth intermediate relay normally-opened end is connected in parallel with the two ends of the second starting button; the third intermediate relay coil and the fourth intermediate relay coil are respectively connected to a switch power supply end through a normally open end of the water leakage overheat protector;
a soft starter starting circuit; the starting ends of the two soft starters are respectively connected with a fifth intermediate relay normally-opened end and a sixth intermediate relay normally-opened end; the two ends of the normally open end of the fifth intermediate relay are connected with the normally open end of the first intermediate relay in parallel; the two ends of the normally open end of the sixth intermediate relay are connected with the normally open end of the second intermediate relay in parallel; coil ends of the first intermediate relay and the second intermediate relay are connected to the PLC;
and the acquisition port of the PLC module is respectively connected with a third relay normally-open end, a fourth relay normally-open end, a low water level liquid level switch, a high water level liquid level switch and two soft starter feedback ends.
2. The dual-pump alternate start-stop and protection control circuit for the sewage tank of claim 1, wherein: the output end of the main circuit breaker is provided with a main current transformer; a current distribution transformer is arranged between the first branch breaker and the soft starter; the main current transformer and the sub current transformers are connected to the main electric energy meter and the sub electric energy meter.
3. The dual-pump alternate start-stop and protection control circuit for the sewage tank of claim 1, wherein: the PLC module is in communication connection with a remote end through a switch; the PLC module is also connected with a remote/local switching button.
4. The dual-pump alternate start-stop and protection control circuit for the sewage tank of claim 1, wherein: the emergency stop button, the first stop button, the second stop button, the first start button, the second start button, the remote/local switching button, the fault indicator lamp, the operation indicator lamp, the power indicator lamp and the sub electric energy meter are all arranged on the control panel; a touch screen is also fixed on the control panel; the touch screen is electrically connected to the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223071038.7U CN218816905U (en) | 2022-11-20 | 2022-11-20 | Double-pump alternate start-stop and protection control circuit for sewage pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223071038.7U CN218816905U (en) | 2022-11-20 | 2022-11-20 | Double-pump alternate start-stop and protection control circuit for sewage pool |
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| Publication Number | Publication Date |
|---|---|
| CN218816905U true CN218816905U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223071038.7U Active CN218816905U (en) | 2022-11-20 | 2022-11-20 | Double-pump alternate start-stop and protection control circuit for sewage pool |
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| CN (1) | CN218816905U (en) |
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- 2022-11-20 CN CN202223071038.7U patent/CN218816905U/en active Active
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