CN212360225U - Control circuit of magnetic pump and control device of magnetic pump - Google Patents
Control circuit of magnetic pump and control device of magnetic pump Download PDFInfo
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- CN212360225U CN212360225U CN202020772424.0U CN202020772424U CN212360225U CN 212360225 U CN212360225 U CN 212360225U CN 202020772424 U CN202020772424 U CN 202020772424U CN 212360225 U CN212360225 U CN 212360225U
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Abstract
The utility model provides a control circuit and the controlling means of magnetic pump, this magnetic pump's control circuit include three-phase alternating current power supply input, step-down circuit, trigger switch circuit, optoelectronic coupler, relay and warning circuit. The technical scheme of the utility model, can prevent that magnetic drive pump idle running from leading to magnetic drive pump to be damaged.
Description
Technical Field
The utility model relates to an electromechanical control technical field, in particular to control circuit of magnetic pump and controlling means of magnetic pump.
Background
At present, various pumps, such as magnetic pumps, are needed for the transmission power source of liquid materials. The magnetic pump belongs to a branch of the field of water pumps, and is a new product which applies the working principle of a permanent magnet coupling to a centrifugal pump, and once idling occurs in the use process of the magnetic pump, the magnetic pump can be damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides a control circuit of magnetic pump and controlling means of magnetic pump can prevent that the magnetic pump from idling and leading to the magnetic pump to be damaged.
In order to achieve the above object, the present invention provides a control circuit of a magnetic pump, which comprises a three-phase ac power input terminal, a voltage reduction circuit, a trigger switch circuit, a photoelectric coupler, a relay and an alarm circuit;
the input end of the voltage reduction circuit is connected with the first end of the input end of the three-phase alternating-current power supply, and the output end of the voltage reduction circuit is connected with the input end of the trigger switch circuit;
the trigger end of the trigger switch circuit is connected with a pressure switch arranged at the water outlet of the magnetic pump, the output end of the trigger switch circuit is connected with the anode of the light emitting diode of the photoelectric coupler, and the cathode of the light emitting diode of the photoelectric coupler is grounded;
a collector of the photoelectric coupler is connected with a first end of the input end of the three-phase alternating current power supply; the emitting electrode of the photoelectric coupler is connected with the first end of the relay coil, the first end of the normally open contact of the relay and the input end of the alarm circuit; the second end of the relay coil and the output end of the alarm circuit are grounded;
the second end of the normally open contact of the relay is connected with the first end of the input end of the three-phase alternating-current power supply; the first end of the first normally closed contact, the first end of the second normally closed contact and the first end of the third normally closed contact of the relay are connected with the magnetic pump; and the second end of the first normally closed contact, the second end of the second normally closed contact and the second end of the third normally closed contact of the relay are correspondingly connected with the first end, the second end and the third end of the input end of the three-phase alternating-current power supply.
Optionally, the voltage dropping circuit includes a first resistor, a second resistor, a first diode, a first capacitor, and a zener diode;
the first end of the first resistor is connected with the first end of the input end of the three-phase alternating-current power supply; the second end of the first resistor is connected with the anode of the first capacitor, the cathode of the voltage stabilizing diode, the first end of the second resistor and the first end of the pressure switch through the first diode; the negative electrode of the first capacitor, the positive electrode of the voltage stabilizing diode and the second end of the second resistor are grounded.
Optionally, the trigger switch circuit includes a trigger circuit and a switch circuit;
the first end of the trigger circuit is connected with the controlled end of the switch circuit, the second end of the trigger circuit is connected with the second end of the pressure switch, the third end of the trigger circuit is grounded, and the fourth end of the trigger circuit is connected with the first end of the pressure switch;
the input end of the switching circuit is connected with the output end of the voltage reduction circuit, and the output end of the switching circuit is connected with the anode of a light emitting diode of the photoelectric coupler.
Optionally, the switch circuit includes a light emitting diode, a third resistor, a fourth resistor, a second capacitor, a third capacitor, an NPN triode, and a PNP triode;
the anode of the light emitting diode is connected with the output end of the voltage reduction circuit, and the cathode of the light emitting diode is connected with the emitter of the NPN triode, the first end of the third resistor and the first end of the second capacitor; the second end of the third resistor, the second end of the second capacitor, the base of the NPN triode and the collector of the PNP triode are connected with the first end of the trigger circuit;
a collector of the NPN triode is connected with a base of the PNP triode, a first end of the third capacitor and a first end of the fourth resistor; and the emitting electrode of the PNP triode, the second end of the third capacitor and the second end of the fourth resistor are connected with the anode of a light emitting diode of the photoelectric coupler.
Optionally, the trigger circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a fourth capacitor;
the positive electrode of the fourth capacitor is connected with the first end of the pressure switch; the negative electrode of the fourth capacitor is connected with the first end of the fifth resistor and the first end of the sixth resistor; a second end of the fifth resistor is grounded; the second end of the sixth resistor is connected with the second end of the pressure switch and the first end of the seventh resistor; and the second end of the seventh resistor is connected with the controlled end of the switch circuit.
Optionally, the alarm circuit includes a ninth resistor and an alarm;
the first end of the ninth resistor is connected with the emitting electrode of the photoelectric coupler and the first end of the normally open contact of the relay, the second end of the ninth resistor is connected with the input end of the alarm, and the output end of the alarm is grounded.
Optionally, the alarm is an audible and visual alarm.
Optionally, the control circuit of the magnetic pump further includes a reset switch;
and the first end of the reset switch is connected with the second end of the input end of the three-phase alternating-current power supply, and the second end of the reset switch is grounded.
In order to achieve the above object, the present invention further provides a control device of a magnetic pump, wherein the control device of the magnetic pump comprises a pressure switch disposed at a water outlet of the magnetic pump and a control circuit of the magnetic pump as described above; the pressure switch is connected with the trigger end of the trigger switch circuit of the control circuit of the magnetic pump.
Optionally, the pressure switch is an air bag switch.
The technical scheme of the utility model, when the pressure at magnetic force pump outlet is less than preset pressure, can trigger the pressure switch disconnection at magnetic force pump outlet, and pressure switch disconnection can trigger this trigger switch circuit and switch into the on-state by the off-state, at this moment, after alternating current power supply carries out the step-down processing through the step-down circuit, through the power supply of the light emitting diode of the on-state trigger switch circuit for photoelectric coupler, make the light emitting diode of photoelectric coupler luminous; the light emitting diode of the photoelectric coupler emits light to trigger current to flow between the collector and the emitter of the photoelectric coupler, so that the coil of the relay is electrified; the relay coil is electrified to trigger the normally open contact of the relay to be closed, so that the alarm circuit sends out an alarm prompt; meanwhile, the relay coil is electrified to trigger the normally closed contact of the relay to be disconnected, so that the alternating current power supply is disconnected from the electric connection of the magnetic pump, the magnetic pump stops running, and the aim of preventing the magnetic pump from idling is fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a block diagram of a control circuit of the magnetic pump according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hardware structure related to an embodiment of a control circuit of the magnetic pump of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of a control circuit of the magnetic pump of the present invention;
fig. 4 is a schematic circuit diagram of another embodiment of the control circuit of the magnetic pump of the present invention.
The reference numbers illustrate:
| 10 | |
20 | |
| 30 | |
40 | |
| 50 | |
100 | |
| 200 | |
300 | Control circuit of |
| 400 | Three-phase |
500 | Liquid storage device |
| KA-1 | Normally open contact of relay | KA-2 | First normally closed contact of relay |
| KA-3 | Second normally closed contact of relay | KA-4 | Third normally closed contact of |
| 201 | |
202 | Trigger circuit |
| R1～R9 | First to ninth resistors | C1～C4 | First to fourth capacitors |
| D1 | First diode | D2 | Light emitting diode |
| T1 | Voltage stabilizing diode | Alarm | Alarm device |
| Q1 | NPN triode | Q2 | PNP triode |
| S1 | Reset switch | GND | Ground |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a block diagram of a control circuit of the magnetic pump according to an embodiment of the present invention.
The control circuit 300 of the magnetic pump comprises a three-phase alternating-current power supply input end, a voltage reduction circuit 10, a trigger switch circuit 20, a photoelectric coupler 30, a relay 40 and an alarm circuit 50; the input end of the voltage reducing circuit 10 is connected with the first end a of the input end of the three-phase alternating-current power supply, and the output end of the voltage reducing circuit 10 is connected with the input end of the trigger switch circuit 20;
the trigger end of the trigger switch circuit 20 is connected with the pressure switch 100 arranged at the water outlet of the magnetic pump 200, and the output end of the trigger switch circuit 20 is connected with the anode of the light emitting diode of the photoelectric coupler 30; the cathode of the led of the photocoupler 30 is grounded, specifically, the cathode of the led of the photocoupler 30 is grounded through a current limiting resistor R8;
the collector of the photoelectric coupler 30 is connected to the first end a of the input terminal of the three-phase ac power supply; the emitter of the photoelectric coupler 30 is connected with the first end of the relay coil 40, the first end of the normally open contact KA-1 of the relay and the input end of the alarm circuit 50; and the second end of the relay coil 40 and the output end of the alarm circuit 50 are grounded;
the second end of a normally open contact KA-1 of the relay is connected with the first end A of the input end of the three-phase alternating-current power supply; the first end of a first normally closed contact KA-2, the first end of a second normally closed contact KA-3 and the first end of a third normally closed contact KA-4 of the relay are connected with the magnetic pump 200; the second end of a first normally closed contact KA-2, the second end of a second normally closed contact KA-3 and the second end of a third normally closed contact KA-4 of the relay are correspondingly connected with a first end A, a second end B and a third end C of a three-phase alternating current power supply input end.
In this embodiment, referring to fig. 2, the water inlet of the magnetic pump 200 is connected to a liquid storage device 500, the pipeline of the water outlet of the magnetic pump 200 is provided with a pressure switch 100, and the pressure switch 100 provided on the pipeline of the water outlet of the magnetic pump 200 may be an air bag switch, such as a 20Kpa type micro-pressure air bag switch. The pressure switch 100 has the following characteristics that if the pressure switch 100 detects that the pressure at the water outlet of the magnetic pump 200 is lower than a preset pressure, for example, lower than 0.5Kpa, the pressure switch 100 is in an off state; if the pressure switch 100 detects that the pressure at the water outlet of the magnetic pump 200 is greater than the preset pressure, the pressure switch 100 is in a closed state. Meanwhile, in the present embodiment, a control circuit 300 of the magnetic pump is provided between the magnetic pump 200 and the three-phase ac power source 400, and the control circuit 300 of the magnetic pump is configured to disconnect the three-phase ac power source 400 from the magnetic pump 200 when the pressure switch 100 is turned off, so as to stop the operation of the magnetic pump 200. The control circuit 300 of the magnetic pump is further configured to connect the three-phase ac power supply 400 to the magnetic pump 200 when the pressure switch 100 is closed, so that the magnetic pump 200 operates normally.
The specific operating principle of the control circuit 300 of the magnetic pump is as follows: when the three-phase alternating current power supply 400 is switched on, the pressure switch 100 detects the pressure at the water outlet of the magnetic pump 200 in real time, and once the pressure at the water outlet of the magnetic pump 200 is smaller than a preset pressure, for example, smaller than 0.5Kpa, the pressure switch 100 is switched from the closed state to the open state. The pressure switch 100 being open triggers the trigger switch circuit 20 to switch from the off state to the on state. When the trigger switch circuit 20 is turned on, the ac power supply at the first end a of the input end of the three-phase ac power supply is stepped down by the step-down circuit 10, for example, stepped down to 12V by the step-down circuit 10, and supplies power to the light emitting diode of the photocoupler 30, so that the light emitting diode of the photocoupler 30 emits light. The light emission of the light emitting diode of the photocoupler 30 triggers the generation of current between the collector and emitter of the photocoupler 30, thereby charging the relay coil 40. The relay coil 40 is electrified to trigger the normally open contact KA-1 of the relay to be switched from the normally open state to the closed state, and the normally closed contacts KA-2, KA-3 and KA-4 of the relay are switched from the normally closed state to the open state, at this moment, the three-phase alternating current power supply is electrically disconnected from the magnetic pump 200, and the magnetic pump 200 stops running. Meanwhile, the alarm circuit 50 sends an alarm prompt to remind the relevant personnel that the liquid in the liquid storage device 500 is too little, which will cause the magnetic pump 200 to idle and need to be processed in time.
The technical scheme of the utility model, when the pressure of magnetic drive pump 200 delivery port is less than preset pressure, can trigger the pressure switch 100 disconnection of magnetic drive pump 200 delivery port, and pressure switch 100 disconnection can trigger this trigger switch circuit 20 and switch into the on-state by the off-state, at this moment, alternating current power supply steps down the processing back through voltage reduction circuit 10, for the power supply of the emitting diode of optoelectronic coupler 30, makes the emitting diode of optoelectronic coupler 30 luminous; the light emitting diode of the photoelectric coupler 30 emits light to trigger the current to flow between the collector and the emitter of the photoelectric coupler 30, so that the relay coil 40 is electrified; the relay coil 40 is electrified to trigger the normally open contact of the relay to be closed, so that the alarm circuit 50 sends out an alarm prompt; meanwhile, the relay coil 40 is electrified to trigger the normally closed contact of the relay to be disconnected, so that the alternating current power supply is disconnected from the electric connection with the magnetic pump 200, the magnetic pump 200 stops running, and the purpose of preventing the magnetic pump 200 from idling is achieved.
Optionally, referring to fig. 3, in an embodiment, the voltage dropping circuit 10 includes a first resistor R1, a second resistor R2, a first diode D1, a first capacitor C1, and a zener diode T1;
a first end of the first resistor R1 is connected to a first end a of an input end of the three-phase ac power supply; a second end of the first resistor R1 is connected to the anode of the first capacitor C1, the cathode of the zener diode T1, a first end of the second resistor R2 and a first end of the pressure switch 100 through the first diode D1; the cathode of the first capacitor C1, the anode of the zener diode T1, and the second end of the second resistor R2 are all grounded.
In this embodiment, the ac power output from the first end a of the three-phase ac power input end is rectified by the first resistor R1 and the first diode D1, and then the rectified voltage is regulated by the voltage regulator diode T1 to a predetermined voltage, for example, to 12V, and the first capacitor C1 performs the charging operation.
Optionally, referring to fig. 3, in an embodiment, the trigger switch circuit 20 includes a trigger circuit 202 and a switch circuit 201;
a first end of the trigger circuit 202 is connected to the controlled end of the switch circuit 201, a second end of the trigger circuit 202 is connected to the second end of the pressure switch 100, a third end of the trigger circuit 202 is grounded, and a fourth end of the trigger circuit 202 is connected to the first end of the pressure switch 100; the input terminal of the switching circuit 202 is connected to the output terminal of the voltage step-down circuit 10, and the output terminal of the switching circuit 10 is connected to the anode of the led of the photocoupler 30.
The trigger circuit 202 is used for releasing the clamping voltage to trigger the switch circuit 201 to conduct when the pressure switch 100 is turned off.
The switching circuit 201, which has two states of on and off, can be implemented by a circuit composed of various transistors, such as a triode or a MOS transistor.
The operating principle of the trigger switch circuit 20 is as follows: the pressure switch 100 detects the pressure at the water outlet of the magnetic pump 200 in real time, and once the pressure at the water outlet of the magnetic pump 200 is smaller than the preset pressure, the pressure switch 100 is switched from a closed state to an open state. When the pressure switch 100 is turned off, the trigger circuit 202 releases the clamping voltage to control the switch circuit 201 to conduct. When the switching circuit 201 is turned on, the ac power supply at the first end a of the input end of the three-phase ac power supply is stepped down by the step-down circuit 10, for example, to 12V by the step-down circuit, and supplies power to the light emitting diode of the photocoupler 30, so that the light emitting diode of the photocoupler 30 emits light. On the contrary, if the pressure at the water outlet of the magnetic pump 200 is greater than the preset pressure, the pressure switch 100 maintains the closed state, at this time, the trigger circuit 202 does not release the clamping voltage, and correspondingly, the switch circuit 201 is in the open state. When the switching circuit 201 is turned off, no current flows through the light emitting diode of the photocoupler 30, and the relay coil 40 is not electrified. Then, the normally open contact KA-1 of the relay maintains the normally open state, the alarm circuit 50 does not send out an alarm prompt, the normally closed contact of the relay maintains the normally closed state, the three-phase alternating current power supply continues to supply power to the magnetic pump 200, and the magnetic pump 200 operates normally.
Optionally, referring to fig. 3, in an embodiment, the switch circuit 201 includes a light emitting diode D2, a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3, an NPN transistor Q1, and a PNP transistor Q2;
the anode of the led D2 is connected to the output terminal of the voltage-dropping circuit 10, and the cathode of the led D2 is simultaneously connected to the emitter of the NPN transistor Q1, the first end of the third resistor R3 and the first end of the second capacitor C2; the second terminal of the third resistor R3, the second terminal of the second capacitor C2, the base of the NPN transistor Q1, and the collector of the PNP transistor Q2 are all connected to the first terminal of the trigger circuit 202;
the collector of the NPN transistor Q1 is connected to the base of the PNP transistor Q2, the first terminal of the third capacitor C3, and the first terminal of the fourth resistor R4; an emitter of the PNP transistor Q2, a second terminal of the third capacitor C3, and a second terminal of the fourth resistor R4 are all connected to an anode of the light emitting diode of the photocoupler 30.
The operating principle of the switching circuit 201 is as follows: the pressure switch 100 detects the pressure at the water outlet of the magnetic pump 200 in real time, and once the pressure at the water outlet of the magnetic pump 200 is smaller than the preset pressure, the pressure switch 100 is switched from a closed state to an open state. When the pressure switch 100 is turned off, the trigger circuit 202 releases the clamping voltage, for example, 2V clamping voltage, so that a voltage exists between the base and the emitter of the NPN transistor Q1, and the NPN transistor Q1 is turned on. The on state of the NPN transistor Q1 triggers the PNP transistor Q2 to be turned on in a chain manner, and at this time, the emitter of the PNP transistor Q2 outputs a current to trigger the light emitting diode of the photocoupler 30 to emit light.
On the contrary, once the pressure at the water outlet of the magnetic pump 200 is greater than the preset pressure, the pressure switch 100 is in a closed state, the trigger circuit 202 does not release the clamping voltage, and at this time, the voltage between the base and the emitter of the NPN transistor Q1 is 0V, so that no current is output to the collector of the NPN transistor Q1. Correspondingly, the voltage between the base and the emitter of the PNP transistor Q2 is 0V, and the emitter of the PNP transistor Q2 cannot output current, and thus cannot trigger the light emitting diode of the photocoupler 30 to emit light.
Optionally, referring to fig. 3, in an embodiment, the trigger circuit 202 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a fourth capacitor C4;
the positive electrode of the fourth capacitor C4 is connected to the first end of the pressure switch 100; the cathode of the fourth capacitor C4 is connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6; and the second end of the fifth resistor R5 is grounded; a second end of the sixth resistor R6 is connected to a second end of the pressure switch 100 and a first end of the seventh resistor R7; a second terminal of the seventh resistor R7 is connected to the controlled terminal of the switch circuit 201.
The operation principle of the trigger circuit 202 is as follows: when the pressure switch 100 is turned off, the fourth capacitor C4 releases the clamping voltage, so that a voltage exists between an emitter and a base of an NPN transistor Q1 in the switch circuit 201, thereby triggering the NPN transistor Q1 in the switch circuit 201 to be turned on, and the NPN transistor Q1 in the switch circuit 201 is turned on to drive a PNP transistor Q2 in the switch circuit 201 to be turned on in a chain manner, so that the entire switch circuit 201 is in a conduction state. On the contrary, when the pressure switch 100 is closed, the fourth capacitor C4 does not discharge voltage, and the voltage between the base and the emitter of the NPN transistor Q1 in the switch circuit 201 is 0V, so the NPN transistor Q1 has no current output, so that the PNP transistor Q2 in the switch circuit 201 also has no current output, and thus the light emitting diode of the photocoupler 30 cannot be triggered to emit light.
Optionally, referring to fig. 3, in an embodiment, the Alarm circuit 50 includes a ninth resistor R9 and an Alarm;
a first end of the ninth resistor R9 is connected to the emitter of the photocoupler 30 and a first end of the normally open contact KA-1 of the relay, a second end of the ninth resistor R9 is connected to an input terminal of an Alarm, and an output terminal of the Alarm is grounded.
This Alarm, optional audible and visual Alarm, this ninth resistance R9 is the current-limiting resistor for protection Alarm, it is too big to avoid flowing through Alarm's electric current. In this embodiment, when the light emitting diode of the photoelectric coupler 30 emits light, the relay coil 40 is electrified, and the normally open contact KA-1 of the relay is triggered to be closed through the electrification of the relay coil 40, so that the Alarm sends out an Alarm prompt. And the relay coil 40 is electrified to trigger the first normally closed contact KA-2, the second normally closed contact KA-3 and the third normally closed contact KA-4 of the relay to be disconnected, at this time, the three-phase alternating current power supply is electrically disconnected with the magnetic pump 200, and the magnetic pump 200 stops running.
Optionally, referring to fig. 4, in an embodiment, the control circuit 300 of the magnetic pump further includes a reset switch S1;
a first terminal of the reset switch S1 is connected to the second terminal B of the three-phase ac power input terminal, and a second terminal of the reset switch S1 is grounded.
The reset switch S1 is used to trigger the control circuit 300 of the magnetic pump to reset to restart the magnetic pump 200 when the failure of the magnetic pump 200 is released. Specifically, after the failure of the magnetic pump 200 is eliminated, and on the premise that the pressure at the water outlet of the magnetic pump 200 is detected to be greater than the preset pressure within a preset time, for example, within 3 seconds, the user presses the reset switch S1, so that the normally open contact KA-1 of the relay is restored to the normally open state, and the normally closed contacts KA-2, KA-3 and KA-4 of the relay are restored to the normally closed state, so that the alarm circuit 50 stops sending the alarm prompt, and the three-phase ac power supply continues to supply power to the magnetic pump 200, so that the magnetic pump 200 is restored to the normal operation.
The utility model also provides a control device of the magnetic pump, which comprises a pressure switch 100 arranged at the water outlet of the magnetic pump and the control circuit of the magnetic pump; the pressure switch is connected to the trigger terminal of the trigger switch circuit 20 in the control circuit of the magnetic pump. The detailed structure of the control circuit of the magnetic pump can refer to the above embodiments, and is not described herein; it can be understood, because the utility model discloses a control circuit of above-mentioned magnetic pump has been used among the control device of magnetic pump, consequently, the utility model discloses control device's of magnetic pump embodiment includes all technical scheme of the whole embodiments of above-mentioned magnetic pump's control circuit, and the technological effect that reaches is also identical, no longer gives details here.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A control circuit of a magnetic pump is characterized by comprising a three-phase alternating-current power supply input end, a voltage reduction circuit, a trigger switch circuit, a photoelectric coupler, a relay and an alarm circuit;
the input end of the voltage reduction circuit is connected with the first end of the input end of the three-phase alternating-current power supply, and the output end of the voltage reduction circuit is connected with the input end of the trigger switch circuit;
the trigger end of the trigger switch circuit is connected with a pressure switch arranged at the water outlet of the magnetic pump, the output end of the trigger switch circuit is connected with the anode of the light emitting diode of the photoelectric coupler, and the cathode of the light emitting diode of the photoelectric coupler is grounded;
a collector of the photoelectric coupler is connected with a first end of the input end of the three-phase alternating current power supply; the emitting electrode of the photoelectric coupler is connected with the first end of the relay coil, the first end of the normally open contact of the relay and the input end of the alarm circuit; the second end of the relay coil and the output end of the alarm circuit are grounded;
the second end of the normally open contact of the relay is connected with the first end of the input end of the three-phase alternating-current power supply; the first end of the first normally closed contact, the first end of the second normally closed contact and the first end of the third normally closed contact of the relay are connected with the magnetic pump; and the second end of the first normally closed contact, the second end of the second normally closed contact and the second end of the third normally closed contact of the relay are correspondingly connected with the first end, the second end and the third end of the input end of the three-phase alternating-current power supply.
2. The control circuit of magnetic pump of claim 1, wherein said voltage dropping circuit comprises a first resistor, a second resistor, a first diode, a first capacitor and a zener diode;
the first end of the first resistor is connected with the first end of the input end of the three-phase alternating-current power supply; the second end of the first resistor is connected with the anode of the first capacitor, the cathode of the voltage stabilizing diode, the first end of the second resistor and the first end of the pressure switch through the first diode; the negative electrode of the first capacitor, the positive electrode of the voltage stabilizing diode and the second end of the second resistor are grounded.
3. The control circuit of a magnetic pump of claim 1, wherein said trigger switch circuit comprises a trigger circuit and a switch circuit;
the first end of the trigger circuit is connected with the controlled end of the switch circuit, the second end of the trigger circuit is connected with the second end of the pressure switch, the third end of the trigger circuit is grounded, and the fourth end of the trigger circuit is connected with the first end of the pressure switch;
the input end of the switching circuit is connected with the output end of the voltage reduction circuit, and the output end of the switching circuit is connected with the anode of a light emitting diode of the photoelectric coupler.
4. The control circuit of a magnetic pump of claim 3, wherein the switching circuit includes a light emitting diode, a third resistor, a fourth resistor, a second capacitor, a third capacitor, an NPN transistor, and a PNP transistor;
the anode of the light emitting diode is connected with the output end of the voltage reduction circuit, and the cathode of the light emitting diode is connected with the emitter of the NPN triode, the first end of the third resistor and the first end of the second capacitor; the second end of the third resistor, the second end of the second capacitor, the base of the NPN triode and the collector of the PNP triode are connected with the first end of the trigger circuit;
a collector of the NPN triode is connected with a base of the PNP triode, a first end of the third capacitor and a first end of the fourth resistor; and the emitting electrode of the PNP triode, the second end of the third capacitor and the second end of the fourth resistor are connected with the anode of a light emitting diode of the photoelectric coupler.
5. The control circuit of a magnetic pump of claim 4, wherein said trigger circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a fourth capacitor;
the positive electrode of the fourth capacitor is connected with the first end of the pressure switch; the negative electrode of the fourth capacitor is connected with the first end of the fifth resistor and the first end of the sixth resistor; a second end of the fifth resistor is grounded; the second end of the sixth resistor is connected with the second end of the pressure switch and the first end of the seventh resistor; and the second end of the seventh resistor is connected with the controlled end of the switch circuit.
6. The control circuit of a magnetic pump of claim 1, wherein said alarm circuit includes a ninth resistor and an alarm;
the first end of the ninth resistor is connected with the emitting electrode of the photoelectric coupler and the first end of the normally open contact of the relay, the second end of the ninth resistor is connected with the input end of the alarm, and the output end of the alarm is grounded.
7. The control circuit for a magnetic pump of claim 6, wherein said alarm is an audible and visual alarm.
8. Control circuit of a magnetic pump according to any of claims 1-7, characterized in that the control circuit of the magnetic pump further comprises a reset switch;
and the first end of the reset switch is connected with the second end of the input end of the three-phase alternating-current power supply, and the second end of the reset switch is grounded.
9. A control device of a magnetic pump, characterized in that the control device of the magnetic pump comprises a pressure switch arranged at a water outlet of the magnetic pump and a control circuit of the magnetic pump according to any one of claims 1-8; the pressure switch is connected with the trigger end of the trigger switch circuit of the control circuit of the magnetic pump.
10. A control apparatus for a magnetic pump according to claim 9, wherein said pressure switch is an air bag switch.
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| CN202020772424.0U CN212360225U (en) | 2020-05-11 | 2020-05-11 | Control circuit of magnetic pump and control device of magnetic pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187734A (en) * | 2021-05-11 | 2021-07-30 | 浙江威邦机电科技有限公司 | Autonomous power supply type water pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187734A (en) * | 2021-05-11 | 2021-07-30 | 浙江威邦机电科技有限公司 | Autonomous power supply type water pump |
| CN113187734B (en) * | 2021-05-11 | 2022-03-15 | 浙江威邦机电科技有限公司 | Autonomous power supply type water pump |
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