CN218041245U - Double-pump drinking water frequency conversion water supply control circuit and control box - Google Patents
Double-pump drinking water frequency conversion water supply control circuit and control box Download PDFInfo
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- CN218041245U CN218041245U CN202123306524.8U CN202123306524U CN218041245U CN 218041245 U CN218041245 U CN 218041245U CN 202123306524 U CN202123306524 U CN 202123306524U CN 218041245 U CN218041245 U CN 218041245U
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Abstract
The utility model relates to a double pump drinking water frequency conversion water supply control circuit and control box, its circuit includes master switch, first motor, the second motor, the converter, voltage regulation circuit, a controller, control switch circuit and pressure transmitter, master switch passes through relay KM1 and relay KM4 and corresponds the electricity with first motor and second motor respectively and is connected, master switch is connected with the converter electricity, the converter passes through relay KM2 and relay KM3 and is connected with first motor and second motor electricity respectively, the converter is connected with controller and pressure transmitter electricity respectively, master switch is connected with voltage regulation circuit electricity, voltage regulation circuit's respectively with controller and control switch circuit electricity be connected, control switch circuit is connected with the controller electricity. The utility model discloses realize the difference control of the power of first water pump and second water pump to guarantee that water supply water pressure is invariable, the operating time of every water pump of rational distribution through the changeable control mode of control switching circuit, has improved water supply control efficiency greatly.
Description
Technical Field
The utility model relates to a water supply control technical field especially relates to a double pump drinking water frequency conversion water supply control circuit and control box.
Background
All need to lean on the bank to supply after marine operation one end time, wherein, the water source is as essential material, and its supply will be very important, and in practice, all need adopt powerful water pump to carry out the water delivery supply, carry the water tank of boats and ships with the clean water source in bank through the power break-make of control water pump in. In the prior art, the water source supply is realized by manually controlling the on-off of a power supply of a single water pump or controlling a plurality of water pumps to work in parallel, but the mode is too single, and the control mode is single and low in efficiency due to the pure manual control mode.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, a double pump drinking water frequency conversion water supply control circuit is provided.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a double pump drinking water frequency conversion water supply control circuit, includes master switch QF1, is used for driving first motor M1 of first water pump, is used for driving second motor M2 of second water pump, converter VVF, voltage regulation circuit, controller, control switching circuit and pressure transmitter, master switch QF 1's three input inserts outside three-phase power L1, L2, L3 respectively as three-phase power input, master switch QF 1's three output A1, B1, C1 respectively with first motor M1 and second motor M2's three input corresponds the electricity and is connected through relay KM1 and relay KM 4's normally open contact, master switch QF 1's three output A1, B1, C1 respectively with converter VVF's three input corresponds the electricity and is connected, converter VVF's three output respectively with first motor M1 and second motor M2's three input corresponds the electricity and is connected through relay KM2 and relay KM3, converter VVF's control signal input with controller's control signal output, two control signal input electricity connection, two converter VVF 1 control signal output with the control signal input of control circuit electricity connection.
The beneficial effects of the utility model are that: the utility model discloses a double pump drinking water frequency conversion water supply control circuit, through pressure transmitter real-time detection water supply water pressure, and feed back extremely the converter, by the converter generates control signal according to water pressure, and by controller control relay KM1, relay KM2, relay KM3 and relay KM4 action realize controlling respectively of the power of first water pump and second water pump to guarantee that water supply water pressure is invariable, the operating time of every water pump of rational distribution, and pass through control switch circuit can the switching control mode, and control mode is abundant, has improved water supply control efficiency greatly.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the voltage regulating circuit comprises a transformer TV and a fuse FU1, two output ends A1 and C1 of the main switch QF1 are respectively and electrically connected with two ends of a primary coil of the transformer TV, two ends of a secondary coil of the transformer TV are respectively and electrically connected with a controller and a power supply input end of a control switching circuit, and the fuse FU1 is electrically connected between the output end A1 of the main switch QF1 and one end of the primary coil of the transformer TV.
The beneficial effects of the above further scheme are: the transformer TV can convert 380V voltage into 220V voltage and provide power for the controller and the control switching circuit so as to meet the power supply requirement of the control circuit part.
Further: the double-pump drinking water frequency conversion water supply control circuit further comprises a thermal relay FR1 and a thermal relay FR2, wherein a thermal element of the thermal relay FR1 is electrically connected between a normally open contact of the relay KM1 and three input ends of the first motor M1, and a thermal element of the thermal relay FR2 is electrically connected between a normally open contact of the relay KM4 and three input ends of the second motor M2.
The beneficial effects of the further scheme are as follows: through setting up electrothermal relay FR1 and electrothermal relay FR2 can play the guard action, can break off automatically when the electric current is too big in the circuit, play overcurrent protection effect.
Further: control switching circuit includes intermediate relay K1, intermediate relay K3, intermediate relay K4, contactor KM1, contactor KM2, contactor KM3, contactor KM4, intermediate relay KB, control change over switch SA, manual stop button SB1 and manual start button SB2, contactor KM1, KM2, KM3, KM 4's normally open contact is parallelly connected after with intermediate relay K1's coil both ends are established ties between two outputs of voltage regulating circuit, no. 1 pin, no. 2 pin, manual stop button SB1, manual start button SB2 and intermediate relay K3's coil is established ties in order between two outputs of voltage regulating circuit, intermediate relay K3's normally open contact is parallelly connected between two outputs of manual start button SB2, manual switch SA's No. 3 pin, no. 4 pin, contactor KM 2's coil is established ties at voltage regulating circuit's normally closed contact 5, no. 6 pin, contactor KM 3's normally closed contact, contactor KM 2's coil is established ties at voltage regulating circuit's normally closed contact and intermediate relay KM 3's normally open contact KM2, normally closed contact KM 3's coil is established ties in order between two outputs of normal closed contact and normal open voltage regulating circuit's coil and normal closed contact KM 2's coil is established ties in order and is established ties between two outputs of normal closed switch SA 10 normal open contact KM 3's normal closed contact and normal open contact 10 normal closed contact KM 2's normal open contact and normal open contact 10 normal open contact and normal closed contact normal open contact series between two outputs of normal closed circuit's normal closed contact and normal closed contact are in order and normal closed contact 10 normal closed contact series between normal closed contact normal open contact normal closed contact and normal closed contact 10 normal open contact series between two outputs of normal closed switch SA The coil of the intermediate relay KB is electrically connected between the start-stop signal output end and the public end of the controller, and the No. 4 pin, the No. 6 pin, the No. 8 pin and the No. 10 pin of the manual switch SA are respectively and electrically connected with the control signal output end of the controller.
The beneficial effects of the further scheme are as follows: the controller can be manually controlled to output control signals through the manual switch SA, the relay KM1, the relay KM2, the relay KM3 and the relay KM4 are controlled to act, and meanwhile, the frequency converter VVF outputs variable-frequency voltage signals to control the power of a corresponding motor, so that the working state and the working power of the water pump under different working conditions are realized, and the water supply pressure is ensured to be constant.
Further: control switching circuit still includes auxiliary relay KA1 and auxiliary relay KA2, thermorelay FR 1's break contact and auxiliary relay KA 1's coil are established ties between two outputs of voltage regulation circuit, thermorelay FR 2's break contact and auxiliary relay KA 2's coil are established ties between two outputs of voltage regulation circuit, auxiliary relay KA 1's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller, auxiliary relay KA 2's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller.
The beneficial effects of the further scheme are as follows: through the dynamic break contact of thermorelay FR1 and the coil of auxiliary relay KA1 establish ties, can be at the dynamic break contact automatic action of thermorelay FR1 during the supply current of first motor, and then pass through the controller informs first motor disconnection source, stop work plays the guard action, and on the same hand, through the dynamic break contact of thermorelay FR2 and auxiliary relay KA 2's coil establish ties, can be at the dynamic break contact automatic action of thermorelay FR2 during the supply current of second motor, and then pass through the controller informs the second motor disconnection source, stop work plays the guard action.
Further: control switching circuit still includes flow switch, auxiliary relay K5, water-deficient switch, time and relay KT and auxiliary relay K2, flow switch and auxiliary relay K5's coil are established ties between two outputs of voltage regulating circuit, water-deficient switch, auxiliary relay K5's normally closed contact, auxiliary relay K1's normally open contact and time relay KT's coil are established ties in order between two outputs of voltage regulating circuit, time relay KT's normally open contact and auxiliary relay K2's coil are established ties between two outputs of voltage regulating circuit, auxiliary relay K1's normally open contact and time relay KT's coil's common terminal with the normally open contact and auxiliary relay K2's coil's common terminal electric connection, auxiliary relay K2's normally open contact electric connection is in the control signal output of converter with between the control signal input of controller, auxiliary relay K5's normally open contact electric connection is in the control signal output of converter with between the control signal input of controller, time and relay's normally open contact electric connection is in the control signal output of converter with between the control signal input.
The beneficial effects of the further scheme are as follows: through flow switch can real-time detection water pump pipeline in discharge, flow switch is closed when having rivers, and the disconnection of water-deficient switch is like this during lack of water, time relay KT disconnection, auxiliary relay K2's coil outage, the switching of the water-deficient signal input end level of controller, controller are through control relay KM1, relay KM2, relay KM3 and relay KM4 action realize control first motor M1 and second motor M2 stop work.
Further: no. 11 pin and No. 12 pin of the manual switch SA are respectively arranged between the control signal output end of the frequency converter and the automatic frequency conversion signal input end of the controller, and No. 13 pin and No. 14 pin of the manual switch SA are respectively arranged between the control signal output end of the frequency converter and the automatic power frequency signal input end of the controller.
The beneficial effects of the further scheme are as follows: through inciting somebody to action No. 11 pin and No. 12 pin of manual switch SA respectively with the control signal output of converter with between the automatic frequency conversion signal input part of controller, can be convenient for like this the automatic control frequency conversion is realized to the controller to realize the dynamic frequency conversion work of water pump motor, through inciting somebody to action No. 13 pin and No. 14 pin of manual switch SA respectively with the control signal output of converter with between the automatic power frequency signal input part of controller, can be convenient for automatic power frequency work is realized to the controller.
Further: control switching circuit still includes pressure switch and auxiliary relay K4, pressure switch and auxiliary relay K4's coil is established ties between two output of voltage regulating circuit, auxiliary relay K4's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller, auxiliary relay K4's normally open contact electricity is connected manual start button SB2 and auxiliary relay K3's coil the common port with between No. 9 pins of manual switch SA.
The beneficial effects of the further scheme are as follows: the pressure of the pipeline can be detected in real time through the pressure switch, and a pressure switch signal is generated and fed back to the controller, so that the water pump motor of the controller can work at the automatic power frequency.
Further: the double-pump drinking water frequency conversion water supply control circuit further comprises an alarm, the alarm passes through a coil of the relay KA and is electrically connected with the control signal output end of the controller, and a normally open contact of the relay KA is electrically connected between the fault signal output ends of the controller.
The beneficial effects of the above further scheme are: through the alarm, the alarm can be given when the circuit breaks down, and the staff can take corresponding measures in time.
The utility model also provides a double pump drinking water frequency conversion water supply control box, the power distribution box comprises a box body and double pump drinking water frequency conversion water supply control circuit, double pump drinking water frequency conversion water supply control circuit sets up in the box.
Drawings
Fig. 1 is a schematic structural diagram of a dual-pump drinking water variable-frequency water supply control circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a peripheral circuit of a controller according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power supply circuit of a voltage regulating circuit according to an embodiment of the present invention;
fig. 4 is a schematic terminal wiring diagram of a dual-pump drinking water variable-frequency water supply control box according to an embodiment of the present invention;
fig. 5 is a schematic front view of the dual-pump drinking water frequency conversion water supply control box according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. and (4) a box body.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a dual-pump drinking water frequency conversion water supply control circuit includes a main switch QF1, a first motor M1 for driving a first water pump, a second motor M2 for driving a second water pump, a frequency converter VVF, a voltage regulating circuit, a controller, a control switching circuit, and a pressure transmitter, wherein three input terminals of the main switch QF1 are respectively connected to external three-phase power sources L1, L2, and L3 as three-phase power input terminals, three output terminals A1, B1, and C1 of the main switch QF1 are respectively and correspondingly electrically connected to three input terminals of the first motor M1 and the second motor M2 through normally open contacts of a relay KM1 and a relay KM4, three output terminals of the frequency converter VVF are respectively and correspondingly and electrically connected to three input terminals of the first motor M1 and the second motor M2 through relays KM2 and KM3, a control signal input terminal of the frequency converter VVF is respectively and electrically connected to three input terminals of the first motor M1 and the second motor M2, a control signal input terminal of the frequency converter VVF is electrically connected to a control signal input terminal of the switching circuit, and a control signal input terminal of the switching circuit are electrically connected to two control signal input terminals of the switching control signal regulating circuit, and the voltage regulating circuit are electrically connected to two control signal input terminals of the control signal input terminal of the frequency converter VVF, and the voltage regulating circuit, and the control signal input terminal of the voltage regulating circuit.
The utility model discloses a double pump drinking water frequency conversion water supply control circuit, through pressure transmitter real-time detection water pressure that supplies water, and feed back extremely the converter, by the converter generates control signal according to water pressure, and is controlled by the controller relay KM1, relay KM2, relay KM3 and relay KM4 action realize controlling respectively of the power of first water pump and second water pump to guarantee that water pressure that supplies water is invariable, the operating time of every water pump of rational distribution, and pass through control switch circuit can the switching control mode, and control mode is abundant, has improved water supply control efficiency greatly.
In one or more embodiments of the present invention, the voltage regulating circuit includes a transformer TV and a fuse FU1, two output terminals A1, C1 of the main switch QF1 are respectively electrically connected to two ends of the primary coil of the transformer TV, two ends of the secondary coil of the transformer TV are respectively electrically connected to the controller and the power input terminal of the control switching circuit, the fuse FU1 is electrically connected to the output terminal A1 of the main switch QF1 and between one end of the primary coil of the transformer TV. The transformer TV can convert 380V voltage into 220V voltage and provide power for the controller and the control switching circuit so as to meet the power supply requirement of the control circuit part.
Optionally, in one or more embodiments of the present invention, the dual-pump drinking water variable-frequency water supply control circuit further includes a thermal relay FR1 and a thermal relay FR2, a thermal element of the thermal relay FR1 is electrically connected between the normally open contact of the relay KM1 and the three inputs of the first motor M1, and a thermal element of the thermal relay FR2 is electrically connected between the normally open contact of the relay KM4 and the three inputs of the second motor M2. Through setting up electrothermal relay FR1 and electrothermal relay FR2 can play the guard action, can break off automatically when the electric current is too big in the circuit, play overcurrent protection effect.
In one or more embodiments of the present invention, the control switching circuit includes an intermediate relay K1, an intermediate relay K3, an intermediate relay K4, a contactor KM1, a contactor KM2, a contactor KM3, a contactor KM4, an intermediate relay KB, a control switching switch SA, a manual stop button SB1, and a manual start button SB2, normally open contacts of the contactors KM1, KM2, KM3, and KM4 are connected in parallel and then connected in series with two ends of a coil of the intermediate relay K1 between two outputs of the voltage regulating circuit, a pin 1, a pin 2, a manual stop button SB1, a manual start button SB2, and a coil of the intermediate relay K3 of the manual switch SA are connected in series in sequence between two outputs of the voltage regulating circuit, the normally open contact of the intermediate relay K3 is connected in parallel at two ends of the manual start button SB2, no. 3 pin and No. 4 pin of manual switch SA, normally closed contact of contactor KM2 and coil of contact point KM1 are connected in series in sequence between two output ends of voltage regulating circuit, no. 5 pin and No. 6 pin of manual switch SA, normally closed contact of contactor KM3, normally closed contact of contactor KM1 and coil of contactor KM2 are connected in series in sequence between two output ends of voltage regulating circuit, no. 7 pin and No. 8 pin of manual switch SA, normally closed contact of contactor KM2, normally closed contact of contactor KM4 and coil of contactor KM3 are connected in series in sequence between two output ends of voltage regulating circuit, no. 9 pin and No. 10 pin of manual switch SA, normally closed contact of contactor KM3 and coil of contactor KM4 are connected in series in sequence between two output ends of voltage regulating circuit, no. 15 pin of manual switch SA, no. 16 pin and intermediate relay K3 are connected in series in sequence and then are connected in parallel with the normally open contact of intermediate relay KBKB between two operation signal input ends of the frequency converter, the coil of the intermediate relay KB is electrically connected between the start-stop signal output end and the public end of the controller, and the No. 4 pin, the No. 6 pin, the No. 8 pin and the No. 10 pin of the manual switch SA are respectively and electrically connected with the control signal output end of the controller.
Through manual switch SA can manual control the controller outputs control signal to control relay KM1, relay KM2, relay KM3 and relay KM4 action, converter VVF outputs frequency conversion voltage signal to control the power of corresponding motor, realizes the operating condition and the operating power of water pump under different operating modes, in order to guarantee that water supply pressure is invariable.
In practice, in order to facilitate remote and timely understanding of the operating state and facilitate circuit expansion, the normally open contact of the intermediate relay K1 may be electrically connected to the terminals 18 and 19 (see fig. 4), so that during wiring, remote external systems and devices are electrically connected to the terminals 18 and 19, respectively, and thus the operating state of the circuit may be remotely transmitted.
Optionally, in one or more embodiments of the utility model, the control switching circuit still includes auxiliary relay KA1 and auxiliary relay KA2, thermorelay FR 1's break contact and auxiliary relay KA 1's coil are established ties between two outputs of voltage regulation circuit, thermorelay FR 2's break contact and auxiliary relay KA 2's coil are established ties between two outputs of voltage regulation circuit, auxiliary relay KA 1's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller, auxiliary relay KA 2's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller. Through the dynamic break contact of thermorelay FR1 and the coil of auxiliary relay KA1 establish ties, can be at the dynamic break contact automatic action of thermorelay FR1 during the supply current of first motor, and then pass through the controller informs first motor disconnection source, stop work plays the guard action, and on the same hand, through the dynamic break contact of thermorelay FR2 and the coil of auxiliary relay KA2 establish ties, can be at the dynamic break contact automatic action of thermorelay FR2 during the supply current of second motor, and then pass through the controller informs the second motor disconnection source, stop work plays the guard action.
The utility model discloses an in one or more embodiments, control switching circuit still includes flow switch, auxiliary relay K5, water-deficient switch, time and relay KT and auxiliary relay K2, flow switch and auxiliary relay K5's coil are established ties between two outputs of voltage regulating circuit, water-deficient switch, auxiliary relay K5's normally closed contact, auxiliary relay K1's normally open contact and time relay KT's coil are established ties in order between two outputs of voltage regulating circuit, time relay KT's normally open contact and auxiliary relay K2's coil are established ties between two outputs of voltage regulating circuit, the normally open contact of auxiliary relay K1 and time relay KT's coil the common port with the common port electricity of normally open contact and auxiliary relay K2's coil be connected, auxiliary relay K2's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller, the normally closed contact electricity of auxiliary relay K5 is connected the control signal output of converter with between the control signal input of controller, time and relay KT's normally open contact electricity is connected between the control signal input of converter and the control signal input. Through flow switch can real-time detection water pump pipeline in discharge, flow switch is closed when having rivers, and the disconnection of water-deficient switch is like this during lack of water, time relay KT disconnection, auxiliary relay K2's coil outage, the switching of the water-deficient signal input end level of controller, controller are through control relay KM1, relay KM2, relay KM3 and relay KM4 action realize control first motor M1 and second motor M2 stop work.
The utility model discloses an in one or more embodiments, no. 11 pins and No. 12 pins of manual switch SA respectively with the control signal output part of converter with between the automatic frequency conversion signal input part of controller, no. 13 pins and No. 14 pins of manual switch SA respectively with the control signal output part of converter with between the automatic power frequency signal input part of controller. Through inciting somebody to action No. 11 pin and No. 12 pin of manual switch SA respectively with the control signal output of converter with between the automatic frequency conversion signal input part of controller, can be convenient for like this the automatic control frequency conversion is realized to the controller to realize the dynamic frequency conversion work of water pump motor, through inciting somebody to action No. 13 pin and No. 14 pin of manual switch SA respectively with the control signal output of converter with between the automatic power frequency signal input part of controller, can be convenient for automatic power frequency work is realized to the controller.
Optionally, in one or more embodiments of the utility model, the control switching circuit still includes pressure switch and auxiliary relay K4, pressure switch and auxiliary relay K4's coil is established ties between two outputs of voltage regulation circuit, auxiliary relay K4's normally open contact electricity is connected the control signal output of converter with between the control signal input of controller, auxiliary relay K4's normally open contact electricity is connected the common terminal of manual start button SB2 and auxiliary relay K3's coil with between No. 9 pins of manual switch SA. The pressure of the pipeline can be detected in real time through the pressure switch, and a pressure switch signal is generated and fed back to the controller, so that the water pump motor of the controller can work at the automatic power frequency.
In practice, in order to conveniently and intuitively display the state of the power supply, a power supply indicator lamp HL1, a first motor (corresponding to the motor 1# in the figure) power frequency overload indicator lamp HL4, a second motor (corresponding to the motor 2# in the figure) power frequency overload indicator lamp HL5, operation indicator lamps SB2-HL, HL6, HL7, HL8, HL9 and the like are further arranged in the control switching circuit, the output end of the controller is electrically connected with a water shortage indicator lamp HL2 and an alarm indicator lamp HB, and the specific connection mode is as shown in figure 3, so that the corresponding indicator lamps can be lightened by the circuit in different states, and the operation is convenient and intuitive.
Optionally, in one or more embodiments of the utility model, double pump drinking water frequency conversion water supply control circuit still include the alarm, the alarm pass through relay KA's coil with the control signal output part electricity of controller is connected, relay KA's normally open contact electricity is connected between the fault signal output part of controller. Through the alarm, the alarm can be given when the circuit breaks down, and the staff can take corresponding measures in time.
In the embodiment of the utility model, the controller adopts current siemens SR30 programmable logic gate array.
The utility model discloses a double pump drinking water frequency conversion water supply control circuit specifically as follows advantage:
1. constant-pressure water supply and water supply guarantee and safety are realized;
2. there are 2 sets of pumps, 4 control modes:
manual power frequency mode: the mode gear is selected, and the selected pump can be started manually at power frequency to supply water;
automatic power frequency mode: starting and stopping the pumps at power frequency according to the system pressure, and automatically switching each pump to another pump after running for a period of time to ensure that the total running time of each pump is constant;
manual frequency conversion mode: the mode gear is selected, and the selected pump can be started for water supply through manual frequency conversion;
automatic frequency conversion mode: the system is in the most common mode, PID control is automatically carried out according to system pressure through frequency conversion, the water supply pressure is ensured to be constant, and a pump is automatically added under the condition of large water consumption;
3. the system has the protection functions of realizing water shortage protection, overload protection, flow protection and the like.
The utility model also provides a double pump drinking water frequency conversion water supply control box, including box 1 with double pump drinking water frequency conversion water supply control circuit, double pump drinking water frequency conversion water supply control circuit sets up in the box 1.
In fact, power indicator HL1, first motor (correspond 1# motor in the picture) power frequency overload indicator HL4, second motor (correspond 2# motor in the picture) power frequency overload indicator HL5 and lack of water indicator HL2 and alarm indicator HB etc. set up respectively on the front panel of box 1, convenient visual display, simultaneously, manual switch SA also sets up on the front panel of box 1, convenient operation.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a double pump drinking water frequency conversion water supply control circuit which characterized in that: including master switch QF1, be used for driving first motor M1 of first water pump, be used for driving second motor M2 of second water pump, converter VVF, voltage regulation circuit, controller, control switching circuit and pressure transmitter, outside three-phase power L1, L2, L3 are inserted respectively as three-phase power input to master switch QF 1's three input, master switch QF 1's three output A1, B1, C1 through relay KM1 and relay KM 4's normally open contact respectively with first motor M1 and second motor M2's three input corresponds the electricity and is connected, master switch QF 1's three output A1, B1, C1 respectively with converter VVF's three input corresponds the electricity and is connected, converter VVF's three output pass through relay KM2 and relay KM3 respectively with first motor M1 and second motor M2's three input corresponds the electricity and is connected, converter VVF's control signal input with controller's control signal output electricity, converter VVF's pressure transmitter with two converter VVF's pressure regulation signal and two control signal input are connected respectively with two control signal input and control circuit input are connected electrically control signal input.
2. The variable-frequency water supply control circuit for the double-pump drinking water according to claim 1, characterized in that: the voltage regulating circuit comprises a transformer TV and a fuse FU1, two output ends A1 and C1 of the main switch QF1 are respectively and electrically connected with two ends of a primary coil of the transformer TV, two ends of a secondary coil of the transformer TV are respectively and electrically connected with a controller and a power supply input end of a control switching circuit, and the fuse FU1 is electrically connected between the output end A1 of the main switch QF1 and one end of the primary coil of the transformer TV.
3. The variable-frequency water supply control circuit for the double-pump drinking water according to claim 1, characterized in that: the electric vehicle further comprises a thermal relay FR1 and a thermal relay FR2, wherein a thermal element of the thermal relay FR1 is electrically connected between a normally open contact of the relay KM1 and three input ends of the first motor M1, and a thermal element of the thermal relay FR2 is electrically connected between a normally open contact of the relay KM4 and three input ends of the second motor M2.
4. The variable-frequency water supply control circuit for the double-pump drinking water according to claim 3, characterized in that: the control switching circuit comprises an intermediate relay K1, an intermediate relay K3, an intermediate relay K4, a contactor KM1, a contactor KM2, a contactor KM3, a contactor KM4, an intermediate relay KB, a manual switch SA, a manual stop button SB1 and a manual start button SB2, wherein the normally open contacts of the contactors KM1, KM2, KM3 and KM4 are connected in parallel and then connected in series with the two ends of the coil of the intermediate relay K1 between the two output ends of the voltage regulating circuit, the normally open contact of the intermediate relay K3 is connected in parallel at the two ends of the manual start button SB2, the normally open contact of the manual switch SA is connected in parallel, the normally open contact of the manual switch SA is connected in series between the two output ends of the voltage regulating circuit, the normally open contact of the manual switch SA is connected in parallel at the two ends of the manual start button SB2, the normally open contact of the manual switch SA is connected in series between the two output ends of the voltage regulating circuit, the normally open contact of the pin SA, the normally closed 4 pin, the contact of the contactor KM2 and the coil of the contact point KM1 are connected in series between the two output ends of the voltage regulating circuit, no. 5 pin and No. 6 pin of the manual switch SA, the normally closed contact of the contactor KM3, the normally closed contact of the contactor KM1 and the coil of the contactor KM2 are sequentially connected in series between two output ends of the voltage regulating circuit, no. 7 pin and No. 8 pin of the manual switch SA, the normally closed contact of the contactor KM2, the normally closed contact of the contactor KM4 and the coil of the contactor KM3 are sequentially connected in series between two output ends of the voltage regulating circuit, no. 9 pin and No. 10 pin of the manual switch SA, the normally closed contact of the contactor KM3 and the coil of the contactor KM4 are sequentially connected in series between two output ends of the voltage regulating circuit, and after the No. 15 pin and No. 16 pin of the manual switch SA and the normally open contact of the intermediate relay KB are sequentially connected in series, the normally open contact of the intermediate relay KB is connected in parallel between two operation signal input ends of the frequency converter, and a coil of the intermediate relay KB is electrically connected between a start-stop signal output end and a public end of the controller, and a pin 4, a pin 6, a pin 8 and a pin 10 of the manual switch SA are respectively and electrically connected with a control signal output end of the controller.
5. The variable-frequency water supply control circuit for double-pump drinking water as claimed in claim 4, characterized in that: control switching circuit still includes auxiliary relay KA1 and auxiliary relay KA2, thermorelay FR 1's break contact and auxiliary relay KA 1's coil are established ties between two outputs of voltage regulating circuit, thermorelay FR 2's break contact and auxiliary relay KA 2's coil are established ties between two outputs of voltage regulating circuit, auxiliary relay KA 1's normally open contact electricity is in the control signal output of converter with between the control signal input of controller, auxiliary relay KA 2's normally open contact electricity is in the control signal output of converter with between the control signal input of controller.
6. The variable-frequency water supply control circuit for the double-pump drinking water as claimed in claim 4, wherein: control switching circuit still includes flow switch, auxiliary relay K5, water-deficient switch, time and relay KT and auxiliary relay K2, flow switch and auxiliary relay K5's coil are established ties between two outputs of voltage regulating circuit, water-deficient switch, auxiliary relay K5's normally closed contact, auxiliary relay K1's normally open contact and time relay KT's coil are established ties in order between two outputs of voltage regulating circuit, time relay KT's normally open contact and auxiliary relay K2's coil are established ties between two outputs of voltage regulating circuit, auxiliary relay K1's normally open contact and time relay KT's coil's common terminal with the normally open contact and auxiliary relay K2's coil's common terminal electric connection, auxiliary relay K2's normally open contact electric connection is in the control signal output of converter with between the control signal input of controller, auxiliary relay K5's normally open contact electric connection is in the control signal output of converter with between the control signal input of controller, time and relay's normally open contact electric connection is in the control signal output of converter with between the control signal input.
7. The variable-frequency water supply control circuit for the double-pump drinking water as claimed in claim 4, wherein: no. 11 pin and No. 12 pin of the manual switch SA are respectively arranged between the control signal output end of the frequency converter and the automatic frequency conversion signal input end of the controller, and No. 13 pin and No. 14 pin of the manual switch SA are respectively arranged between the control signal output end of the frequency converter and the automatic power frequency signal input end of the controller.
8. The variable-frequency water supply control circuit for the double-pump drinking water as claimed in claim 4, wherein: control switching circuit still includes pressure switch and auxiliary relay K4, pressure switch and auxiliary relay K4's coil is established ties between two output of voltage regulating circuit, auxiliary relay K4's normally open contact electricity is in the control signal output of converter with between the control signal input of controller, auxiliary relay K4's normally open contact electricity is in the common terminal of manual start button SB2 and auxiliary relay K3's coil with between No. 9 pins of manual switch SA.
9. The dual-pump drinking water variable-frequency water supply control circuit according to any one of claims 1-8, characterized in that: the alarm is electrically connected with the control signal output end of the controller through a coil of the relay KA, and the normally open contact of the relay KA is electrically connected between the fault signal output ends of the controller.
10. The utility model provides a double pump drinking water frequency conversion water supply control box which characterized in that: comprises a box body (1) and the variable-frequency water supply control circuit for the double-pump drinking water, which is set in the box body (1), according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123306524.8U CN218041245U (en) | 2021-12-27 | 2021-12-27 | Double-pump drinking water frequency conversion water supply control circuit and control box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123306524.8U CN218041245U (en) | 2021-12-27 | 2021-12-27 | Double-pump drinking water frequency conversion water supply control circuit and control box |
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| CN218041245U true CN218041245U (en) | 2022-12-13 |
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| CN202123306524.8U Active CN218041245U (en) | 2021-12-27 | 2021-12-27 | Double-pump drinking water frequency conversion water supply control circuit and control box |
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| Country | Link |
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| CN (1) | CN218041245U (en) |
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