CN211930525U - Water pump one-use one-standby frequency conversion control system - Google Patents
Water pump one-use one-standby frequency conversion control system Download PDFInfo
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- CN211930525U CN211930525U CN202020497999.6U CN202020497999U CN211930525U CN 211930525 U CN211930525 U CN 211930525U CN 202020497999 U CN202020497999 U CN 202020497999U CN 211930525 U CN211930525 U CN 211930525U
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Abstract
The utility model relates to an electrical control technical field provides a water pump is used one and is equipped with frequency conversion control system, include: the device comprises a power supply module, a switch module and a frequency conversion control module, wherein the frequency conversion control module comprises a first contactor, a second contactor, a third contactor, a start button, a first relay, a first change-over switch and a frequency converter; the first contactor comprises a first coil, a first main contact and a first normally open contact; the second contactor comprises a second coil and a second main contact; the third contactor comprises a third coil and a third main contact; the first relay comprises a fourth coil and a second normally open contact; the first conversion switch comprises a first gate position and a second gate position; the frequency conversion control module of the water pump one-use one-standby frequency conversion control system can control the water pump to work in a frequency conversion environment, so that the accurate speed regulation of the water pump is realized, and the energy-saving effect is obvious; when the water pump breaks down, can switch over to another water pump work through first change over switch, switch convenient operation is swift, effectively guarantees that water supply lasts and goes on.
Description
Technical Field
The utility model relates to an electrical control technical field especially provides a water pump is used one and is equipped with frequency conversion control system.
Background
At present, for preventing to lead to supplying water to stop because of the water pump trouble, can set up one and use two water pumps that are equipped with one usually, under the condition that a water pump broke down, another water pump can put into operation to guarantee that the water supply lasts.
However, the existing water pump one-use one-standby control system usually adopts a contactor or a soft starter and a contactor mode to realize the work of the water pump under a power frequency environment, cannot meet the requirement of a load on the speed, cannot realize the accurate speed regulation of the water pump, and leads to higher energy consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water pump is used one and is equipped with frequency conversion control system aims at solving current water pump and is used one and be equipped with control system and can't realize carrying out accurate speed governing to the water pump, leads to the higher technical problem of energy consumption.
In order to achieve the above object, the utility model adopts the following technical scheme: a water pump one-use one-standby frequency conversion control system comprises:
the power supply module is used for taking power through commercial power and outputting an electric signal;
the switch module is connected with the power module and is used for transmitting the electric signal when the switch module is closed;
the frequency conversion control module comprises a first contactor, a second contactor, a third contactor, a start button, a first relay, a first change-over switch and a frequency converter;
the first contactor comprises a first coil, a first main contact and a first normally open contact; the second contactor comprises a second coil and a second main contact; the third contactor comprises a third coil and a third main contact; the first relay comprises a fourth coil and a second normally open contact; the first conversion switch comprises a first gate position and a second gate position;
the wire inlet end of the starting button, the wire inlet end of the first main contact, the wire inlet end of the first normally open contact, the wire inlet end of the first brake position and the wire inlet end of the second brake position are connected to the wire outlet end of the switch module; the wire outlet end of the first main contact is connected with the wire inlet end of the frequency converter; the wire inlet end of the second main contact and the wire inlet end of the third main contact are connected to the wire outlet end of the frequency converter, the wire outlet end of the second main contact is connected with the first water pump, and the wire outlet end of the third main contact is connected with the second water pump; the wire inlet end of the second normally open contact is connected with the wire inlet end of the frequency converter, and the wire outlet end of the second normally open contact is connected with the common end of the frequency converter; the wire inlet end of the first coil is connected with the wire outlet end of the starting button, and the wire outlet end is connected with a zero line; the wire inlet end of the second coil is connected with the wire outlet end of the first brake position, and the wire outlet end is connected with a zero line; the wire inlet end of the third coil is connected with the wire outlet end of the second brake position, and the wire outlet end is connected with a zero line; and the wire inlet end of the fourth coil is connected with the wire outlet end of the first normally open contact, and the wire outlet end is connected with a zero line.
The utility model provides a water pump is used one and is equipped with frequency conversion control system has following beneficial effect at least: the power supply module supplies power to the variable frequency control module through the switch module and supplies power to the first water pump and the second water pump simultaneously; the variable frequency control module can control the water pump in the running state to work in a variable frequency environment, so that the water pump is accurately regulated in speed, and the energy-saving effect is obvious; when one of them water pump broke down, can switch over to another water pump work rapidly through operating first change over switch, switch over convenient operation is swift, effectively guarantees that water supply lasts and goes on, and the water pump after switching under the control of frequency conversion control module equally can work under the frequency conversion environment, further promotes energy-conserving effect.
In one embodiment, the variable frequency control module further comprises a second change-over switch, a remote control unit and a potentiometer; the second change-over switch comprises a third brake position, a fourth brake position and a fifth brake position, and the remote control unit comprises a start-stop contact; the wire inlet end of the starting button is connected to the wire outlet end of the switch module through the third brake position, the wire inlet end of the fourth brake position is connected with the wire outlet end of the switch module, the wire outlet end of the fourth brake position is connected with the wire inlet end of the starting and stopping contact, and the wire outlet end of the starting and stopping contact is connected with the wire inlet end of the first coil; the wire inlet end of the fifth brake position is connected with the switching value input end of the frequency converter, and the wire outlet end of the fifth brake position is connected with the common end of the frequency converter; the potentiometer is connected with a first analog quantity input end of the frequency converter; and a second analog quantity input end of the frequency converter is connected with a current signal output end of the remote control unit.
In one embodiment, the variable frequency control module further includes a stop button, and the wire inlet end of the start button is connected to the wire outlet end of the switch module sequentially through the stop button and the third gate position.
In one embodiment, the frequency conversion control module further includes an emergency stop button, and the wire inlet end of the first gate, the wire inlet end of the second gate, the wire inlet end of the third gate, the wire inlet end of the fourth gate and the wire inlet end of the first normally open contact are connected to the wire outlet end of the switch module through the emergency stop button.
In one embodiment, the frequency conversion control module further includes a second relay, the second relay includes a fifth coil and a first normally closed contact, a fault signal input end of the frequency converter is connected with a wire outlet end of the switch module, a fault signal output end of the frequency converter is connected with a wire inlet end of the fifth coil, the wire outlet end of the fifth coil is connected with a zero wire, and the wire inlet end of the first coil is connected with the wire outlet end of the start button through the first normally closed contact.
In one embodiment, the frequency conversion control module further comprises a first indicator light and a second indicator light, the first contactor further comprises a second normally closed contact, an incoming line end of the first indicator light is connected with an outgoing line end of the first normally open contact, and the outgoing line end is connected with a zero line; and the wire inlet end of the second normally closed contact is connected with the wire outlet end of the switch module, the wire outlet end of the second normally closed contact is connected with the wire inlet end of the second indicator light, and the wire outlet end of the second indicator light is connected with a zero line.
In one embodiment, the first contactor further comprises a third normally open contact, and the third normally open contact is connected in parallel with the starting button to form a self-holding loop.
In one embodiment, the frequency conversion control module further includes a heat dissipation fan, the first contactor further includes a fourth normally open contact, an incoming line end of the fourth normally open contact is connected with an outgoing line end of the switch module, an outgoing line end of the fourth normally open contact is connected with an incoming line end of the heat dissipation fan, and an outgoing line end of the heat dissipation fan is connected with a zero line.
In one embodiment, the number of the heat dissipation fans is multiple, and the heat dissipation fans are connected in parallel in sequence.
In one embodiment, the switch module is a circuit breaker.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a block diagram of a water pump one-use one-standby frequency conversion control system provided in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a main circuit structure of a frequency conversion control module of the water pump one-use one-standby frequency conversion control system shown in FIG. 1;
FIG. 3 is a schematic circuit diagram of a frequency conversion control module of the water pump one-use one-standby frequency conversion control system shown in FIG. 1;
FIG. 4 is a schematic diagram of a port connection structure of a frequency converter of the water pump one-use one-standby frequency conversion control system shown in FIG. 1;
fig. 5 is a schematic diagram of a signal feedback circuit structure of the water pump one-use one-standby variable frequency control system shown in fig. 1.
Wherein, in the figures, the respective reference numerals:
10. the device comprises a power supply module, 20, a switch module, 30, a variable frequency control module, 40, a first water pump, 50 and a second water pump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, a water pump one-use one-standby variable frequency control system includes: a power module 10, a switch module 20 and a variable frequency control module 30.
The power module 10 is powered by commercial power and used for outputting an electrical signal. The commercial power is 220V alternating current, and the power module 10 supplies the electric signal to the variable frequency control module 30, the first water pump 40 and the second water pump 50 to operate.
The switch module 20 is connected with the power module 10, and transmits the electric signals to the variable frequency control module 30, the first water pump 40 and the second water pump 50 when the switch module is closed; optionally, the embodiment of the utility model provides an adopt the circuit breaker as switch module 20, the inlet wire end of circuit breaker is connected with power module 10's leading-out terminal, and under initial condition, the circuit breaker is in combined floodgate state to the above-mentioned signal of telecommunication of transmission power module 10 output.
The frequency conversion control module 30 comprises a first contactor, a second contactor, a third contactor, a start button, a first relay, a first change-over switch and a frequency converter;
the first contactor comprises a first coil, a first main contact and a first normally open contact; the second contactor comprises a second coil and a second main contact; the third contactor comprises a third coil and a third main contact; the first relay comprises a fourth coil and a second normally open contact; the first conversion switch comprises a first gate position and a second gate position;
the wire inlet end of the start button, the wire inlet end of the first main contact, the wire inlet end of the first normally open contact, the wire inlet end of the first gate position and the wire inlet end of the second gate position are connected to the wire outlet end of the switch module 20; the wire outlet end of the first main contact is connected with the wire inlet end of the frequency converter; the wire inlet end of the second main contact and the wire inlet end of the third main contact are connected to the wire outlet end of the frequency converter, the wire outlet end of the second main contact is connected with the first water pump 40, and the wire outlet end of the third main contact is connected with the second water pump 50; the wire inlet end of the second normally open contact is connected with the wire inlet end of the frequency converter, and the wire outlet end of the second normally open contact is connected with the common end of the frequency converter; the wire inlet end of the first coil is connected with the wire outlet end of the starting button, and the wire outlet end is connected with a zero line; the wire inlet end of the second coil is connected with the wire outlet end of the first brake position, and the wire outlet end is connected with a zero line; the wire inlet end of the third coil is connected with the wire outlet end of the second brake position, and the wire outlet end is connected with a zero line; the wire inlet end of the fourth coil is connected with the wire outlet end of the first normally open contact, and the wire outlet end is connected with the zero line.
Referring to fig. 2 to 4, in the embodiment of the present invention, L1 represents a first phase line of the utility power, L2 represents a second phase line of the utility power, L3 represents a third phase line of the utility power, and N represents a zero line of the utility power; the first water pump 40 is denoted by M1, and the second water pump 50 is denoted by M2; QF is adopted to represent the circuit breaker, and L11 represents the connection point of the variable-frequency control module 30 and the circuit breaker QF; adopting VF to represent a frequency converter, FWD to represent an open end of the frequency converter VF, and COM to represent a common end of the frequency converter VF; a first coil of the first contactor is represented by KM1, a first main contact of the first contactor is represented by KM10, and a first normally open contact of the first contactor is represented by KM 11; a second coil of the second contactor is represented by KM2, and a second main contact of the second contactor is represented by KM 20; a third coil of the third contactor is represented by KM3, and a third main contact of the third contactor is represented by KM 30; the start button is denoted SF 1; a fourth coil of the first relay is represented by KA1, and a second normally open contact of the first relay is represented by KA 11; SA1 is adopted to represent a first change-over switch, firstly, a first gate position of the first change-over switch SA1 is represented, and secondly, a second gate position of the first change-over switch SA1 is represented.
The working principle of the water pump one-use-one-standby variable frequency control system is described in detail below by using the first water pump M1 as a main pump and the second water pump M2 as a standby pump.
Initially, the first switch position (first) of the first transfer switch SA2 is turned on, at this time, the second coil KM2 of the second contactor is powered on and closed, and the second main contact KM20 of the second contactor is in a closed state. When power module 10 has the electricity, start button SF1 is pressed, the first coil KM1 of first contactor gets the electricity actuation, the first main contact KM10 of first contactor is in the closure state, the first normally open contact KM11 of first contactor is in the closure state, at this moment, converter VF gets the electricity work, the fourth coil KA1 of first relay gets the electricity actuation, the second normally open contact KA11 of first relay is in the closure state, make converter VF open the end FWD and switch on with common port COM, first water pump M1 can operate according to the different output frequency of converter VF. When the first water pump M1 has a fault, the first transfer switch SA1 can be manually switched to the second gate position (c), at this time, the first gate position (c) of the first transfer switch SA1 is disconnected, the second coil KM2 of the second contactor loses power, the second main contact KM20 of the second contactor is in a disconnected state, and the first water pump M1 stops working; the second switch position (c) of the first transfer switch SA1 is conducted, the third coil KM3 of the third contactor is electrified and attracted, the third main contact KM30 of the third contactor is in a closed state, and the second water pump M2 can start to operate according to different output frequencies of the frequency converter VF.
In the water pump one-use one-standby variable frequency control system, the power module 10 supplies power to the variable frequency control module 30 through the switch module 20, and simultaneously supplies power to the first water pump 40 and the second water pump 50; the variable frequency control module 30 can control the water pump in the running state to work in a variable frequency environment, so that the water pump is accurately regulated in speed, and the energy-saving effect is obvious; when one of them water pump broke down, can switch over to another water pump work rapidly through operating first change over switch, switch over convenient operation is swift, effectively guarantees that water supply lasts and goes on, and the water pump after switching under the control of frequency conversion control module 30 equally can work under the frequency conversion environment, further promotes energy-conserving effect.
In an embodiment, please refer to fig. 2 to 4, the frequency conversion control module 30 further includes a second switch, a remote control unit, and a potentiometer; the second change-over switch comprises a third brake position, a fourth brake position and a fifth brake position, and the remote control unit comprises a start-stop contact; the wire inlet end of the starting button is connected to the wire outlet end of the switch module 20 through a third gate position, the wire inlet end of a fourth gate position is connected with the wire outlet end of the switch module 20, the wire outlet end of the fourth gate position is connected with the wire inlet end of the starting and stopping contact, and the wire outlet end of the starting and stopping contact is connected with the wire inlet end of the first coil; the wire inlet end of the fifth brake position is connected with the switching value input end of the frequency converter VF, and the wire outlet end of the fifth brake position is connected with the common end of the frequency converter VF; the potentiometer is connected with a first analog quantity input end of the frequency converter VF; and a second analog quantity input end of the frequency converter VF is connected with a current signal output end of the remote control unit.
Referring to fig. 2 to 4, in the embodiment of the present invention, SA2 is used to indicate the second switch, and sixth indicates the third gate position of the second switch, and seventh indicates the fourth gate position of the second switch, and ninc r indicates the fifth gate position of the second switch; representing a remote control unit by adopting DCS, and representing a start-stop contact of the remote control unit DCS by D1; r represents a potentiometer; x1 denotes a switching value input terminal of the frequency converter VF, AI1 denotes a first analog value input terminal of the frequency converter VF, and AI2 denotes a second analog value input terminal of the frequency converter VF.
By adopting the embodiment, the water pump one-use one-standby variable frequency control system has two variable frequency control modes of a local variable frequency control mode and a remote variable frequency control mode; in the in-situ mode, a third gate position (c) and a fourth gate position (c) of a second transfer switch SA2 are conducted, a switching value input end X1 of a frequency converter VF is closed with a common end COM, a first analog value input end AI1 of the frequency converter VF receives a voltage frequency signal output from a potentiometer R, after a start button SF1 is pressed, a first coil KM1 of a first contactor is electrified and pulled, a first main contact KM10 of the first contactor is in a closed state, and by adjusting the voltage frequency of the potentiometer R, a first water pump M1 or a second water pump M2 can realize variable frequency operation according to the voltage frequency signal; in the remote mode, the fifth gate position of the second transfer switch SA2 is turned on, the third gate position is turned off, the switching value input end X1 of the frequency converter VF is turned off from the common end COM, the start-stop contact D1 of the remote control unit DCS is turned on, the remote control unit DCS is powered, the second analog value input end AI2 of the frequency converter VF receives the current frequency signal output from the current signal output end of the remote control unit, after the start button SF1 is pressed, the first coil KM1 of the first contactor is powered and pulled in, the first main contact KM10 of the first contactor is in a closed state, and the first water pump M1 or the second water pump M2 can realize variable frequency operation according to the current frequency signal, specifically, the current frequency signal is a current frequency signal of 4-20 mA.
In an embodiment, please refer to fig. 3 and 4 in combination, the frequency converter VF further has a first analog output end and a second analog output end, and the embodiment of the present invention adopts AO1 to represent the first analog output end of the frequency converter VF and AO2 to represent the second analog output end of the frequency converter VF. The first analog quantity output terminal AO1 outputs a 4-20mA current signal to a tachometer (not shown) for displaying the rotating speed of the first water pump M1 or the second water pump M2; the second analog output AO2 is used for feeding back a 4-20mA current frequency signal to the remote control unit DCS.
Optionally, the frequency converter VF is of the HOPE800 series. Of course, the frequency converter VF may also adopt other types of frequency converters according to actual production needs, and is not limited in detail herein.
In an embodiment, please refer to fig. 3, the first switch further includes a first stop gear, and the second switch further includes a second stop gear, in which the embodiment of the present invention adopts OFF to represent the first stop gear and the second stop gear at the same time. After the first change-over switch SA1 is switched to a first stop gear and the second change-over switch SA2 is switched to a second stop gear, the water pump primary and secondary variable frequency control system enters an overhaul mode, at the moment, the first coil KM1 of the first contactor, the second coil KM2 of the second contactor, the third coil KM3 of the third contactor and the fourth coil KA1 of the first relay are powered off, the first main contact KM10, the second main contact KM20, the third main contact KM30, the first normally open contact KM12 and the second normally open contact KA11 of the first contactor are all disconnected, the open end FWD and the common end COM of the frequency converter VF are both disconnected, and the water pump primary and secondary variable frequency control system is in a completely power-off state, so that a user can overhaul the water pump primary and secondary variable frequency control system.
In an embodiment, please refer to fig. 2 and 4, the frequency conversion control module 30 further includes a stop button, and the incoming line end of the start button SF1 is connected to the outgoing line end of the switch module 20 sequentially through the stop button and the third gate position, (-) -c). Referring to fig. 3, the embodiment of the present invention adopts SS1 as the stop button. When the system is in the in-situ mode, the first main contact KM10 of the first contactor can be de-energized by pressing a stop button SS1, so that the first water pump M1 or the second water pump M2 stops running; when the system is in the remote mode, the first main contact KM10 of the first contactor can be de-energized by pressing the start-stop contact D1 of the remote control unit DCS, so that the first water pump M1 or the second water pump M2 stops running.
In an embodiment, please refer to fig. 3 and 4, the frequency conversion control module 30 further includes an emergency stop button, and the wire inlet end of the first gate position (c), the wire inlet end of the second gate position (c), the wire inlet end of the third gate position (c), the wire inlet end of the fourth gate position (c), and the wire inlet end of the first normally open contact KM11 are connected to the wire outlet end of the switch module 20 through the emergency stop button. Referring to fig. 3, the embodiment of the present invention adopts SS2 to represent the emergency stop button. When the system runs and emergency situations related to personal safety and equipment safety occur, the emergency stop button SS2 can be directly pressed to cut off the working power supply of the variable frequency control module 30, at the moment, no matter the system is in a local mode or a remote mode, the first water pump M1 or the second water pump M2 stops running, after the fault is eliminated, the emergency stop button SS2 is pressed again to reset the system, and the first water pump M1 or the second water pump M2 restarts running.
In one embodiment, please refer to fig. 3, the variable frequency control module 30 further includes a first fuse, and the first fuse is connected between the switch module 20 and the emergency stop button SS 2. Referring to fig. 3, the embodiment of the present invention adopts FU1 to represent the first fuse. The first fuse FU1 functions as overload or short-circuit protection for the variable frequency control module 30.
In an embodiment, please refer to fig. 3, the frequency conversion control module 30 further includes a second relay, the second relay includes a fifth coil and a first normally closed contact, a fault signal input end of the frequency converter VF is connected to the wire outlet end of the switch module 20, a fault signal output end of the frequency converter VF is connected to a wire inlet end of the fifth coil, a wire outlet end of the fifth coil is connected to the zero line, and a wire inlet end of the first coil KM1 is connected to a wire outlet end of the start button SF1 through the first normally closed contact. Referring to fig. 3, in the embodiment of the present invention, KA2 is used to indicate a fifth coil of the second relay, and KA22 is used to indicate a first normally closed contact of the second relay; 2TA denotes a fault signal input of the frequency converter VF, and 2TB denotes a fault signal output of the frequency converter VF. When the frequency converter VF detects that the circuit has faults such as overcurrent, overvoltage, undervoltage or overheating of the device, the fault signal input end 2TA and the fault signal output end 2TB of the frequency converter VF are closed, the fifth coil KA2 of the second relay is electrified and sucked, the first normally closed contact KA22 of the second relay is disconnected, the first coil KM1 of the first contactor is electrified, the first main contact KM10 of the first contactor is disconnected, and the water pump is used for realizing the fault power-off protection function of the one-standby frequency conversion control system.
In an embodiment, please refer to fig. 3, the frequency conversion control module 30 further includes a first indicator light and a second indicator light, the first contactor further includes a second normally closed contact, an incoming line end of the first indicator light is connected to an outgoing line end of the first normally open contact KM11, and the outgoing line end is connected to the zero line; the wire inlet end of the second normally closed contact is connected with the wire outlet end of the switch module 20, the wire outlet end of the second normally closed contact is connected with the wire inlet end of the second indicator light, and the wire outlet end of the second indicator light is connected with the zero line. The first indicator light is used for indicating the working state of the system, and the second indicator light is used for indicating the shutdown state of the system. Referring to fig. 3, in the embodiment of the present invention, HR1 is used to represent a first indicator light, and HG1 is used to represent a second indicator light; KM12 represents the second normally closed contact of the first contactor. When the first coil KM1 of the first contactor is electrified and attracted, the first normally open contact KM11 is closed, the second normally closed contact KM12 is opened, at the moment, the first indicator lamp HR1 is lightened, and the second indicator lamp HG1 is extinguished; when the first coil KM1 of the first contactor loses power, the first normally open contact KM11 is opened, the second normally closed contact KM12 is closed, and at this time, the first indicator lamp HR1 is turned off, and the second indicator lamp HG1 is turned on.
In one embodiment, as shown in fig. 3, the first contactor further includes a third normally open contact connected in parallel with the start button SF1 to form a self-holding loop. Referring to fig. 3, in the embodiment of the present invention, KM13 is used to indicate the third normally open contact. When the first coil KM1 of the first contactor is electrified and attracted, the third normally open contact KM13 is closed to form a self-holding loop, so that the stability of the water pump one-use one-standby variable frequency control system is improved.
In an embodiment, please refer to fig. 3, the frequency conversion control module 30 further includes a heat dissipation fan, the first contactor further includes a fourth normally open contact, an incoming line end of the fourth normally open contact is connected to an outgoing line end of the switch module 20, the outgoing line end is connected to an incoming line end of the heat dissipation fan, and the outgoing line end of the heat dissipation fan is connected to the zero line. Referring to fig. 3, in the embodiment of the present invention, KM15 is used to indicate a fourth normally open contact of the first contactor; FS1 denotes a radiator fan. When the first coil KM1 of the first contactor is electrified and attracted, the fourth normally open contact KM15 is closed, and the cooling fan FS1 is started, so that forced convection cooling is performed on the water pump one-use one-standby variable frequency control system.
In an embodiment, please refer to fig. 3, the variable frequency control module 30 further includes a second fuse, and the second fuse is connected between the switch module 20 and the fourth normally open contact KM15 of the first contactor. Referring to fig. 3, the embodiment of the present invention adopts FU2 as the second fuse. The second fuse FU2 functions as overload or short-circuit protection for the variable frequency control module 30.
In an embodiment, please refer to fig. 3, the number of the heat dissipation fans is multiple, and the heat dissipation fans are connected in parallel in sequence. Referring to fig. 3, FS2, FS3, and FSn are used to represent each cooling fan according to the embodiment of the present invention. When the first coil KM1 of the first contactor is electrified and attracted, the fourth normally open contact KM15 is closed, and the cooling fans FS1, FS2 and FSn are started, so that forced convection cooling of the water pump one-use one-standby variable frequency control system is realized, and the cooling performance of the water pump one-use one-standby variable frequency control system is further improved.
In an embodiment, this embodiment is combined with the foregoing embodiment, please refer to fig. 3 to fig. 5, where the first contactor further includes a fifth normally open contact, the second relay further includes a sixth normally open contact, the second switch SA2 further includes a sixth gate position, the second contactor further includes a seventh normally open contact, the third contactor further includes an eighth normally open contact, the fifth normally open contact is connected to an operation signal input terminal of the remote control unit DCS, the sixth normally open contact is connected to a fault signal input terminal of the remote control unit DCS, the seventh normally open contact is connected to a first working signal input terminal of the remote control unit DCS, the eighth normally open contact is connected to a second working signal input terminal of the remote control unit DCS, and the sixth gate position is connected to a remote signal input terminal of the remote control unit DCS. Referring to fig. 3, in the embodiment of the present invention, KM14 is used to indicate a fifth normally open contact of the first contactor; a sixth normally open contact of the second relay is represented by KA 21; a seventh normally open contact of the second contactor is represented by KM 21; a sixth normally open contact of the third contactor is represented by KM 31; by using
A sixth gate position of the second switch SA 2. When the first coil KM1 of the first contactor is electrified and attracted, the fifth normally-open contact KM14 is closed, and the system returns an operation signal to the remote control unit DCS; when the fifth coil KA2 of the second relay is electrified and attracted, the sixth normally open contact KA21 is closed, and the system returns a fault signal to the remote control unit DCS; the sixth gate position of the second transfer switch SA2 when the system is in remote mode
Conducting, and returning a remote control signal to a remote control unit DCS by the system; when the second coil KM2 of the second contactor is electrically attracted, the seventh normally open contact KM21 is closed,the system returns a working signal of the first water pump M1 to the remote control unit DCS; when the second coil KM3 of the third contactor is electrified and attracted, the eighth normally open contact KM31 is closed, and the system returns a working signal of the second water pump M2 to the remote control unit DCS. By adopting the above-described embodiment, the operating states of the first and second water pumps M1 and M2 can be monitored in real time.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A water pump is with one and is equipped with frequency conversion control system, its characterized in that includes:
the power supply module is used for taking power through commercial power and outputting an electric signal;
the switch module is connected with the power module and is used for transmitting the electric signal when the switch module is closed;
the frequency conversion control module comprises a first contactor, a second contactor, a third contactor, a start button, a first relay, a first change-over switch and a frequency converter;
the first contactor comprises a first coil, a first main contact and a first normally open contact; the second contactor comprises a second coil and a second main contact; the third contactor comprises a third coil and a third main contact; the first relay comprises a fourth coil and a second normally open contact; the first conversion switch comprises a first gate position and a second gate position;
the wire inlet end of the starting button, the wire inlet end of the first main contact, the wire inlet end of the first normally open contact, the wire inlet end of the first brake position and the wire inlet end of the second brake position are connected to the wire outlet end of the switch module; the wire outlet end of the first main contact is connected with the wire inlet end of the frequency converter; the wire inlet end of the second main contact and the wire inlet end of the third main contact are connected to the wire outlet end of the frequency converter, the wire outlet end of the second main contact is connected with the first water pump, and the wire outlet end of the third main contact is connected with the second water pump; the wire inlet end of the second normally open contact is connected with the wire inlet end of the frequency converter, and the wire outlet end of the second normally open contact is connected with the common end of the frequency converter; the wire inlet end of the first coil is connected with the wire outlet end of the starting button, and the wire outlet end is connected with a zero line; the wire inlet end of the second coil is connected with the wire outlet end of the first brake position, and the wire outlet end is connected with a zero line; the wire inlet end of the third coil is connected with the wire outlet end of the second brake position, and the wire outlet end is connected with a zero line; and the wire inlet end of the fourth coil is connected with the wire outlet end of the first normally open contact, and the wire outlet end is connected with a zero line.
2. The water pump one-use one-standby frequency conversion control system as claimed in claim 1, characterized in that: the frequency conversion control module also comprises a second change-over switch, a remote control unit and a potentiometer; the second change-over switch comprises a third brake position, a fourth brake position and a fifth brake position, and the remote control unit comprises a start-stop contact; the wire inlet end of the starting button is connected to the wire outlet end of the switch module through the third brake position, the wire inlet end of the fourth brake position is connected with the wire outlet end of the switch module, the wire outlet end of the fourth brake position is connected with the wire inlet end of the starting and stopping contact, and the wire outlet end of the starting and stopping contact is connected with the wire inlet end of the first coil; the wire inlet end of the fifth brake position is connected with the switching value input end of the frequency converter, and the wire outlet end of the fifth brake position is connected with the common end of the frequency converter; the potentiometer is connected with a first analog quantity input end of the frequency converter; and a second analog quantity input end of the frequency converter is connected with a current signal output end of the remote control unit.
3. The water pump one-use one-standby frequency conversion control system as claimed in claim 2, characterized in that: the variable frequency control module further comprises a stop button, and the wire inlet end of the start button is connected with the wire outlet end of the switch module sequentially through the stop button and the third brake position.
4. The water pump one-use one-standby frequency conversion control system as claimed in claim 2, characterized in that: the frequency conversion control module further comprises an emergency stop button, and the wire inlet end of the first brake position, the wire inlet end of the second brake position, the wire inlet end of the third brake position, the wire inlet end of the fourth brake position and the wire inlet end of the first normally open contact are connected to the wire outlet end of the switch module through the emergency stop button.
5. The water pump one-use one-standby frequency conversion control system as claimed in claim 1, characterized in that: the frequency conversion control module further comprises a second relay, the second relay comprises a fifth coil and a first normally closed contact, the fault signal input end of the frequency converter is connected with the wire outlet end of the switch module, the fault signal output end of the frequency converter is connected with the wire inlet end of the fifth coil, the wire outlet end of the fifth coil is connected with the zero line, and the wire inlet end of the first coil is connected with the wire outlet end of the starting button through the first normally closed contact.
6. The water pump one-use one-standby frequency conversion control system as claimed in claim 1, characterized in that: the frequency conversion control module further comprises a first indicator light and a second indicator light, the first contactor further comprises a second normally closed contact, the wire inlet end of the first indicator light is connected with the wire outlet end of the first normally open contact, and the wire outlet end of the first indicator light is connected with the zero line; and the wire inlet end of the second normally closed contact is connected with the wire outlet end of the switch module, the wire outlet end of the second normally closed contact is connected with the wire inlet end of the second indicator light, and the wire outlet end of the second indicator light is connected with a zero line.
7. The water pump one-use one-standby frequency conversion control system as claimed in claim 1, characterized in that: the first contactor further comprises a third normally open contact which is connected in parallel with the starting button to form a self-holding loop.
8. The water pump one-use one-standby frequency conversion control system as claimed in claim 1, characterized in that: the variable frequency control module further comprises a heat radiation fan, the first contactor further comprises a fourth normally open contact, the wire inlet end of the fourth normally open contact is connected with the wire outlet end of the switch module, the wire outlet end of the fourth normally open contact is connected with the wire inlet end of the heat radiation fan, and the wire outlet end of the heat radiation fan is connected with a zero line.
9. The water pump one-use one-standby frequency conversion control system as claimed in claim 8, wherein: the heat radiation fans are multiple and are connected in parallel in sequence.
10. A water pump one-use one-standby frequency conversion control system according to any one of claims 1 to 9, characterized in that: the switch module is a circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020497999.6U CN211930525U (en) | 2020-04-08 | 2020-04-08 | Water pump one-use one-standby frequency conversion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020497999.6U CN211930525U (en) | 2020-04-08 | 2020-04-08 | Water pump one-use one-standby frequency conversion control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211930525U true CN211930525U (en) | 2020-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020497999.6U Active CN211930525U (en) | 2020-04-08 | 2020-04-08 | Water pump one-use one-standby frequency conversion control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211930525U (en) |
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2020
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