CN212479533U - High-power water pump control cabinet - Google Patents
High-power water pump control cabinet Download PDFInfo
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- CN212479533U CN212479533U CN202020012497.XU CN202020012497U CN212479533U CN 212479533 U CN212479533 U CN 212479533U CN 202020012497 U CN202020012497 U CN 202020012497U CN 212479533 U CN212479533 U CN 212479533U
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Abstract
The utility model discloses a high-power water pump control cabinet, which comprises a first circuit breaker, a PLC, a first control circuit and a second control circuit; the first control circuit and the second control circuit are connected in parallel, and the first control circuit and the second control circuit are connected with the first circuit breaker in series; the PLC controls the first control circuit and the second control circuit to be alternatively connected at the same time; the first control circuit is a variable frequency starting operation control circuit; the second control circuit is an autotransformer voltage reduction starting full-voltage operation control circuit. Through the technical scheme, the combined control of frequency conversion and voltage reduction of the autotransformer is realized, and the device has the advantages of stable operation, power saving and high reliability.
Description
Technical Field
The utility model relates to a low pressure complete control equipment technical field especially relates to a high-power pump control cabinet.
Background
The existing high-power water pump control cabinet generally adopts two types: the water pump control cabinet adopts a frequency conversion starting operation mode, has the advantages of better energy-saving effect, but also has the following defects: the frequency converter is prone to failure, and the running reliability of the water pump is low.
In contrast, there is another mode, namely, a star triangle or autotransformer is adopted to start full-voltage operation in a voltage reduction mode, and although the operation reliability of the high-power water pump control cabinet is improved, the energy-saving effect is relatively poor.
In the prior art, a high-power water pump control cabinet capable of realizing variable frequency and autotransformer step-down combined control does not exist in China, and the consistent situation is one of the technical problems to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a high-power water pump control cabinet which can realize the voltage reduction combination control of a frequency converter and an autotransformer.
In order to solve the above technical problem, the utility model discloses the technical scheme content that adopts specifically as follows:
a high-power water pump control cabinet comprises a first circuit breaker, a PLC, a first control circuit and a second control circuit; the first control circuit and the second control circuit are connected in parallel, and the first control circuit and the second control circuit are connected with the first circuit breaker in series; the PLC controls the first control circuit and the second control circuit to be alternatively connected at the same time;
the first control circuit is a variable frequency starting operation control circuit; the second control circuit is an autotransformer voltage reduction starting full-voltage operation control circuit.
Preferably, the first control circuit is a common circuit, and the second control circuit is a standby circuit.
In order to solve the technical problem of realizing the combined control of frequency conversion and voltage reduction of the autotransformer, the inventor creatively arranges two control circuits which are connected in parallel in a high-power water pump control cabinet in the technical scheme, wherein the two control circuits are respectively a frequency conversion starting operation control circuit (namely a first control circuit) and an autotransformer voltage reduction starting full-voltage operation control circuit (namely a second control circuit). This technical scheme is in the same place original independent converter start-up operation water pump mode and the mode combination of independent autotransformer step-down start-up water pump, and write new control procedure, it is commonly used to set for the converter, autotransformer step-down start is reserve operation procedure, it has converter and autotransformer step-down start-up in water pump control cabinet of an organic whole to form one kind, the start-up and the operation of daily water pump are controlled by the converter, when the converter breaks down, by autotransformer step-down start full pressure operation, guarantee the normal work of water pump, have the steady operation, the power saving, the advantage that the reliability is high.
Preferably, the first control circuit comprises a second circuit breaker, a frequency converter, a PLC and a first ac contactor; and the PLC controls the frequency converter to realize the connection and disconnection of the second circuit breaker, the frequency converter and the first alternating current contactor.
It should be noted that the PLC may control the inverter and the ac contactor to operate to start the water pump and may adjust the frequency to operate the water pump.
More preferably, the second circuit breaker, the frequency converter and the first ac contactor are connected in series.
It should be noted that the circuit is simpler and more efficient by connecting in series.
More preferably, the second control circuit includes a third circuit breaker, a second ac contactor, a third ac contactor, a fourth ac contactor, a thermal relay, and an autotransformer; the PLC controls the frequency converter to realize connection and disconnection of a third circuit breaker, a second alternating current contactor, a third alternating current contactor and a fourth alternating current contactor; the thermal relay is connected with the second alternating current contactor in series; the autotransformer is connected in series with the third AC contactor and the fourth AC contactor.
It should be noted that, in an embodiment, when the water pump is shut down due to a failure of the frequency converter, the PLC automatically sends a control signal immediately, the frequency converter is turned off, meanwhile, the third ac contactor and the fourth ac contactor are attracted, the autotransformer is turned on to start the water pump by voltage reduction, the third ac contactor and the fourth ac contactor are turned off, then the PLC controls the second ac contactor to be attracted, the operation is converted into the power frequency full-voltage operation water pump, and after the autotransformer is turned on to start the water pump by voltage reduction, the frequency converter is recovered to be normal and automatically converted into the operation mode of the frequency converter, so that the alternate operation is realized.
Preferably, the second control circuit includes a plurality of third circuit breakers, a second ac contactor, and a thermal relay; the third circuit breaker, the second alternating current contactor and the thermal relay are connected and disconnected in a series connection mode; each thermal relay is connected with the water pump.
It should be noted that, by this way, can realize the dual-purpose one of water pump and reserve, improve the reliability of system.
Preferably, the first control circuit and the second control circuit are connected with the water pump in series.
Preferably, the PLC includes a receiving terminal for receiving operation information of the frequency converter.
It should be noted that, the PLC includes that the receiving terminal receives the operation information of the frequency converter, can realize automatically that circuit control is realized according to the frequency converter operation condition, need not manual operation for control is more swift high-efficient.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the high-power water pump control cabinet of the utility model combines the original independent mode of starting and operating the water pump by the frequency converter and the independent mode of starting the water pump by the autotransformer in a voltage reduction way, and has the advantages of stable operation, power saving and high reliability;
2. the second circuit breaker, the frequency converter and the first alternating current contactor are connected in series, so that the high-power water pump control cabinet is simpler and more efficient;
3. the utility model discloses a high-power water pump control cabinet, which can start the water pump and operate the water pump with adjustable frequency by the action of a PLC controllable frequency converter and an AC contactor;
4. the utility model discloses a high-power water pump control cabinet, PLC include that the receiving terminal receives the operational information of converter, can realize automatically that circuit control is realized according to the converter operational aspect, need not manual operation for control is swift more high-efficient. The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a circuit control diagram of a preferred embodiment of the high-power water pump control cabinet of the present invention;
FIG. 2 is a circuit control diagram of another preferred embodiment of the high-power water pump control cabinet of the present invention;
wherein the reference symbols are: 11. a first circuit breaker; 12. a second circuit breaker; 13. a third circuit breaker; 2. a frequency converter; 33. a PLC programming module; 41. a first AC contactor; 42. a second AC contactor; 43. a third AC contactor; 44. a fourth AC contactor; 53. a cabinet body; 6. a thermal relay; 7. an autotransformer.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments as follows:
fig. 1 shows a circuit control diagram of a preferred embodiment of the high-power water pump control cabinet of the present invention; the circuit breaker comprises a first circuit breaker 11, a PLC programming module 33 (PLC for short), a first control circuit and a second control circuit; the first control circuit and the second control circuit are connected in parallel, and the first control circuit and the second control circuit are connected with the first circuit breaker in series; and the PLC controls the first control circuit and the second control circuit to be alternatively connected at the same time.
As a preferred embodiment, in the present embodiment, the first control circuit includes a first control circuit including the second circuit breaker 12, the frequency converter 2, the PLC, and the first ac contactor 41; and the PLC controls the frequency converter to realize the connection and disconnection of the second circuit breaker, the frequency converter and the first alternating current contactor. The PLC can control the action of the frequency converter and the alternating current contactor to start the water pump and adjust the frequency to operate the water pump.
As a preferred embodiment, in this embodiment, the second circuit breaker, the inverter and the first ac contactor are connected in series. The series connection mode makes the circuit simpler, high-efficient.
As a preferred embodiment, in the present embodiment, the second control circuit includes a third circuit breaker 13, a second ac contactor 42, a third ac contactor 43, a fourth ac contactor 44, a thermal relay 6, and an autotransformer 7; the PLC controls the frequency converter to realize connection and disconnection of a third circuit breaker, a second alternating current contactor, a third alternating current contactor and a fourth alternating current contactor; the thermal relay is connected with the second alternating current contactor in series; the autotransformer is connected in series with the third AC contactor and the fourth AC contactor.
The working principle and the process of the preferred embodiment are as follows, when the water pump stops when the frequency converter breaks down, the PLC automatically sends out a control signal at once, the frequency converter is disconnected, meanwhile, the third AC contactor and the fourth AC contactor are attracted, the autotransformer is switched on to start the water pump in a voltage reduction mode, the third AC contactor and the fourth AC contactor are disconnected, then the PLC controls the second AC contactor to be attracted again, the operation is converted into a power frequency full-voltage operation water pump, after the autotransformer is switched on to start the water pump in a voltage reduction mode, the frequency converter is recovered to be normal, the operation mode of the frequency converter is automatically converted into, the alternate operation is realized, and the frequency converter has the advantages of stable operation, electricity saving.
As a preferred implementation manner, in this embodiment, the first control circuit is a normal circuit, and the second control circuit is a standby circuit.
In order to solve the technical problem of realizing the combined control of frequency conversion and voltage reduction of the autotransformer, the inventor creatively arranges two control circuits which are connected in parallel in a high-power water pump control cabinet in the technical scheme, wherein the two control circuits are respectively a frequency conversion starting operation control circuit (namely a first control circuit) and an autotransformer voltage reduction starting full-voltage operation control circuit (namely a second control circuit). This technical scheme is in the same place original independent converter start-up operation water pump mode and the mode combination of independent autotransformer step-down start-up water pump, and write new control procedure, it is commonly used to set for the converter, autotransformer step-down start is reserve operation procedure, it has converter and autotransformer step-down start-up in water pump control cabinet of an organic whole to form one kind, the start-up and the operation of daily water pump are controlled by the converter, when the converter breaks down, by autotransformer step-down start full pressure operation, guarantee the normal work of water pump, have the steady operation, the power saving, the advantage that the reliability is high.
As a preferred embodiment, in the present embodiment, a cabinet 53 is further included for defining the positions of the above components.
As a preferred implementation manner, in the present embodiment, the first control circuit and the second control circuit are connected in series with the water pump.
In another preferred embodiment, in combination with the above embodiment, as shown in fig. 2, the second control circuit includes a plurality of third circuit breakers, a second ac contactor, and thermal relays; the third circuit breaker, the second alternating current contactor and the thermal relay are connected and disconnected in a series connection mode; each thermal relay is connected with the water pump. Through the mode, the dual-purpose one of the water pump can be realized, and the reliability of the system is improved.
With reference to the foregoing embodiment, in another preferred embodiment, the PLC includes a receiving end, configured to receive operation information of the frequency converter. PLC includes that the receiving terminal receives the running information of converter, can realize automatically that it realizes circuit control according to the converter behavior, need not manual operation for control is more swift high-efficient.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. A high-power water pump control cabinet is characterized by comprising a first circuit breaker, a PLC, a first control circuit and a second control circuit; the first control circuit and the second control circuit are connected in parallel, and the first control circuit and the second control circuit are connected with the first circuit breaker in series; the PLC controls the first control circuit and the second control circuit to be alternatively connected at the same time;
the first control circuit is a variable frequency starting operation control circuit; the second control circuit is an autotransformer voltage reduction starting full-voltage operation control circuit.
2. The high power water pump control cabinet according to claim 1, wherein the first control circuit is a normal circuit, and the second control circuit is a standby circuit.
3. The high-power water pump control cabinet according to claim 1, wherein the first control circuit comprises a second circuit breaker, a frequency converter, a PLC and a first AC contactor; and the PLC controls the frequency converter to realize the connection and disconnection of the second circuit breaker, the frequency converter and the first alternating current contactor.
4. The high power water pump control cabinet according to claim 3, wherein the second circuit breaker, the frequency converter and the first AC contactor are connected in series.
5. The high power water pump control cabinet according to claim 3, wherein the second control circuit comprises a third circuit breaker, a second AC contactor, a third AC contactor, a fourth AC contactor, a thermal relay and an autotransformer; the PLC controls the frequency converter to realize connection and disconnection of a third circuit breaker, a second alternating current contactor, a third alternating current contactor and a fourth alternating current contactor; the thermal relay is connected with the second alternating current contactor in series; the autotransformer is connected in series with the third AC contactor and the fourth AC contactor.
6. The high power water pump control cabinet according to claim 5, wherein the second control circuit comprises a plurality of third circuit breakers, second ac contactors and thermal relays; the third circuit breaker, the second alternating current contactor and the thermal relay are connected and disconnected in a series connection mode; each thermal relay is connected with the water pump.
7. The high power water pump control cabinet according to claim 1, wherein the first control circuit and the second control circuit are connected in series with the water pump.
8. The high-power water pump control cabinet according to any one of claims 3 to 6, wherein the PLC comprises a receiving terminal for receiving operation information of the frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020012497.XU CN212479533U (en) | 2020-01-05 | 2020-01-05 | High-power water pump control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020012497.XU CN212479533U (en) | 2020-01-05 | 2020-01-05 | High-power water pump control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212479533U true CN212479533U (en) | 2021-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020012497.XU Active CN212479533U (en) | 2020-01-05 | 2020-01-05 | High-power water pump control cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212479533U (en) |
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2020
- 2020-01-05 CN CN202020012497.XU patent/CN212479533U/en active Active
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