CN214403926U - Automatic water drainage protection device of water pump - Google Patents
Automatic water drainage protection device of water pump Download PDFInfo
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- CN214403926U CN214403926U CN202120360016.9U CN202120360016U CN214403926U CN 214403926 U CN214403926 U CN 214403926U CN 202120360016 U CN202120360016 U CN 202120360016U CN 214403926 U CN214403926 U CN 214403926U
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- water pump
- float switch
- effect transistor
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Abstract
The utility model discloses an automatic water drainage protection device of a water pump, wherein a water inlet pipe is arranged at the upper part of a water tank, and a valve is arranged on the water inlet pipe; the lower side part of the water tank is provided with a water discharge pipe and is connected with a water pump, and the water discharge pipe is provided with a water outlet pipe; a low-water-level mechanical float switch is also arranged at the lower side part of the water tank and is positioned at the upper part of the drain pipe; the upper side part of the water tank is provided with a high-water-level mechanical float switch; the low-water-level mechanical float switch and the high-water-level mechanical float switch are respectively connected with the bistable trigger control circuit, the bistable trigger control circuit is connected with the relay, the relay is connected with the contactor, one end of the contactor is connected with the water pump, and the other end of the contactor is connected with the power switch of the water pump. The utility model discloses can only use opening of single relay just can control opening of water pump under the environment of keeping away from PLC to avoid the water pump motor idle running phenomenon to appear, thereby protection motor and saving electric energy, greatly reduced manufacturing cost.
Description
Technical Field
The utility model relates to a motor protection device field especially relates to a drain pump protection device.
Background
Condensate water can be generated after the steam is condensed, and the condensate water needs to be collected and then is conveyed to a boiler to realize secondary utilization. The comdenstion water is collected need carry out the water pump after the water tank and provides kinetic energy and carry, and general comdenstion water yield is less, and if the phenomenon of idle running can appear in the water pump all the time, can cause the water pump to damage on the one hand, and on the other hand causes the waste of electric energy again.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome prior art's weak point, provide one kind and be used for water pump automatic drainage protection device to can only use opening of single relay just can control opening of water pump under the environment of keeping away from PLC in the hope, and avoid the water pump motor idle running phenomenon to appear, thereby protect the motor and practice thrift electric energy, greatly reduced manufacturing cost.
The utility model discloses a realize through following technical scheme:
the utility model relates to a water pump automatic drainage protection device, including the water tank, its structural feature lies in: a water inlet pipe is arranged at the upper part of the water tank, and a valve is arranged on the water inlet pipe;
the lower side part of the water tank is provided with a drain pipe and is connected with a water pump, and the water pump is provided with a water outlet pipe;
a low-water-level mechanical float switch is also arranged at the lower side part of the water tank and is positioned at the upper part of the drain pipe;
a high-water-level mechanical float switch is arranged at the upper side part of the water tank; the low-water-level mechanical floating ball switch and the high-water-level mechanical floating ball switch are respectively connected with a bistable trigger control circuit, the bistable trigger control circuit is connected with a relay, the relay is connected with a contactor, one end of the contactor is connected with the water pump, and the other end of the contactor is connected with a power switch of the water pump.
A water pump automatic drainage protection device's characteristics also lie in: the circuit structure of the bistable trigger control circuit is as follows:
resistance R2One terminal of (1) and a resistor R1Is connected to one end of the resistor R1The other end of the first end is connected to a field effect transistor T1On the base electrode of (1), the resistor R2Another terminal of (1) and a resistor R3One end of each of the first and second power supply units is connected with a power supply 24V +; the power supply 24V + is also connected to a field effect transistor T2On the collector electrode;
field effect transistor T0And said field effect transistor T1The emitting electrodes of the two-way grounding device are all grounded;
the resistor R2Another end of the first and second electrodes is connected to the field effect transistor T0On the collector electrode, the resistance R3The other end of the first end is connected to a field effect transistor T1On the collector electrode; the field effect transistor T0Emitter and field effect transistor T1The emitting electrodes are respectively connected with the high-water-level mechanical float switch and the low-water-level mechanical float switch;
the field effect transistor T2The emitter of the driving relay is connected with the contactor.
Compared with the prior art, the utility model has the following advantages:
the utility model discloses an aspect can avoid the water pump motor idle running phenomenon to protection motor and saving electric energy, on the other hand can only use opening of single relay just can control opening of water pump under the environment of keeping away from PLC, greatly reduced manufacturing cost.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention;
FIG. 2 is a circuit diagram of the bistable trigger control circuit of the present invention;
reference numbers in the figures: 1, a water tank; 2, a water pump; 3 a bistable trigger control circuit; 4 low water level mechanical float switch; 5, high water level mechanical float switch; 6, a relay; 7 a contactor; 8, a water pump power switch; 9 water draining pipe; 10, discharging a water pipe; 11 a valve; 12 water inlet pipe.
Detailed Description
In this embodiment, as shown in fig. 1, an automatic water discharge protection device for a water pump includes a water tank 1, a water pump 2, a water inlet pipe 12, a water outlet pipe 10, a mechanical float switch, a bistable trigger control circuit 3, a relay 6, a contactor 7, and the like, wherein the water inlet pipe 12 is arranged at the upper part of the water tank 1, and a valve 11 is arranged on the water inlet pipe 12;
the lower side part of the water tank 1 is provided with a drain pipe 9, and is connected with the water pump 2 through a pipeline for conveying the water in the water tank 1 to a designated place; the water pump 2 is provided with a water outlet pipe 10;
a low-water-level mechanical float switch 4 is also arranged at the lower side part of the water tank 1, and the low-water-level mechanical float switch 4 is positioned at the upper part of a drain pipe 9;
the upper side part of the water tank 1 is provided with a high-level mechanical float switch 5; for detecting the water tank level. The low-water-level mechanical float switch 4 and the high-water-level mechanical float switch 5 are respectively connected with the bistable trigger control circuit 3, the bistable trigger control circuit 3 is connected with the relay 6, the relay 6 is connected with the contactor 7, one end of the contactor 7 is connected with the water pump 2 through a power cable, and the other end of the contactor is connected with the water pump power switch 8;
when water is injected into the water tank 1 from the water inlet pipe 12 and the water level reaches the high-water-level mechanical float switch 5, the high-water-level mechanical float switch 5 acts to transmit a signal to the bistable trigger control circuit 3, the bistable trigger control circuit 3 transmits the signal to the relay 6, the relay 6 controls the contactor 7 to attract, and the water pump 2 starts to operate;
when the water level is reduced to the low-water-level mechanical float switch 4, the low-water-level mechanical float switch 4 acts to transmit a signal to the bistable trigger control circuit 3, the bistable trigger control circuit 3 transmits the signal to the relay 6, the relay 6 controls the contactor 7 to be disconnected, and the water pump 2 stops running.
In this embodiment, the bistable trigger control circuit 3 is designed based on a classical bistable trigger circuit, as shown in fig. 2, a resistor R2One terminal of (1) and a resistorR1Is connected to one end of a resistor R1The other end of the first end is connected to a field effect transistor T1On the base electrode of (1), a resistor R2Another terminal of (1) and a resistor R3One end of each of the first and second power supply units is connected with a power supply 24V +; the power supply 24V + is also connected to the field effect transistor T2On the collector electrode;
field effect transistor T0Emitter and field effect transistor T1The emitting electrodes of the two-way grounding device are all grounded;
resistance R2The other end of the first end is connected to a field effect transistor T0On the collector electrode of (2), resistance R3The other end of the first end is connected to a field effect transistor T1On the collector electrode; field effect transistor T0Emitter and field effect transistor T1The emitting electrodes are respectively connected with a high-water-level mechanical float switch 5 and a low-water-level mechanical float switch 4;
field effect transistor T2Emitter drive relay 6(JDQ) of (1) is connected to contactor 7 (KA).
In the specific implementation, the resistances of R2 and R3 are equal to each other and are in the range of 1-5 k omega, and the resistances of R1 and R0 are equal to each other and are in the range of 10-50 k omega. The bistable trigger control circuit 3 mostly adopts small-sized elements, resistors are 1/8W or 1/4W, T2 adopts small-sized tubes and the like, if the driving capability is required to be increased, the driving capability is required to be increased only by increasing the dissipation power of T2, the bistable trigger control circuit can be arranged in a plastic box of 10 multiplied by 6 multiplied by 3.5cm or a smaller plastic box by adopting a small-sized design, and a wiring is led out by using a small-sized wiring terminal, so that the bistable trigger control circuit has the characteristics of small volume and fine structure. And the circuit power supply adopts direct current 24V voltage, and the safety and reliability are high.
Claims (2)
1. The utility model provides a water pump automatic drainage protection device, includes water tank (1), its characterized in that: a water inlet pipe (12) is arranged at the upper part of the water tank (1), and a valve (11) is arranged on the water inlet pipe (12);
a drain pipe (9) is arranged at the lower side part of the water tank (1) and is connected with a water pump (2), and the water pump (2) is provided with a water outlet pipe (10);
a low-water-level mechanical float switch (4) is further arranged at the lower side part of the water tank (1), and the low-water-level mechanical float switch (4) is positioned at the upper part of a drain pipe (9);
a high-water-level mechanical float switch (5) is arranged at the upper side part of the water tank (1); the low-water-level mechanical float switch (4) and the high-water-level mechanical float switch (5) are respectively connected with the bistable trigger control circuit (3), the bistable trigger control circuit (3) is connected with the relay (6), the relay (6) is connected with the contactor (7), one end of the contactor (7) is connected with the water pump (2), and the other end of the contactor is connected with the water pump power switch (8).
2. The automatic water drainage protection device of the water pump according to claim 1, characterized in that: the circuit structure of the bistable trigger control circuit (3) is as follows:
resistance R2One terminal of (1) and a resistor R1Is connected to one end of the resistor R1The other end of the first end is connected to a field effect transistor T1On the base electrode of (1), the resistor R2Another terminal of (1) and a resistor R3One end of each of the first and second power supply units is connected with a power supply 24V +; the power supply 24V + is also connected to a field effect transistor T2On the collector electrode;
field effect transistor T0And said field effect transistor T1The emitting electrodes of the two-way grounding device are all grounded;
the resistor R2Another end of the first and second electrodes is connected to the field effect transistor T0On the collector electrode, the resistance R3The other end of the first end is connected to a field effect transistor T1On the collector electrode; the field effect transistor T0Emitter and field effect transistor T1The emitting electrodes of the two-way valve are respectively connected with a high-water-level mechanical float switch (5) and a low-water-level mechanical float switch (4);
the field effect transistor T2The emitter drive relay (6) is connected with the contactor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120360016.9U CN214403926U (en) | 2021-02-09 | 2021-02-09 | Automatic water drainage protection device of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120360016.9U CN214403926U (en) | 2021-02-09 | 2021-02-09 | Automatic water drainage protection device of water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214403926U true CN214403926U (en) | 2021-10-15 |
Family
ID=78025893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120360016.9U Active CN214403926U (en) | 2021-02-09 | 2021-02-09 | Automatic water drainage protection device of water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214403926U (en) |
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2021
- 2021-02-09 CN CN202120360016.9U patent/CN214403926U/en active Active
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