CN215805101U - Built-in protection device of water pump - Google Patents
Built-in protection device of water pump Download PDFInfo
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- CN215805101U CN215805101U CN202122240828.2U CN202122240828U CN215805101U CN 215805101 U CN215805101 U CN 215805101U CN 202122240828 U CN202122240828 U CN 202122240828U CN 215805101 U CN215805101 U CN 215805101U
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Abstract
The utility model discloses a built-in protection device of a water pump, which comprises a power supply module, a relay module and a control module, wherein the front stage of the power supply module is connected with an input power supply of commercial power, and the rear stage of the power supply module supplies power to the relay module and the control module; the control module comprises a controller, a temperature sensor arranged in the water pump and a mutual inductor connected to an input power supply, wherein the temperature sensor and the mutual inductor are respectively connected with the controller; the relay module comprises a forward relay for controlling the normal operation of the water pump and a reverse relay for controlling the reverse operation of the water pump, the forward relay and the reverse relay are respectively connected with the controller, and the controller switches the suction/cut-off states of the forward relay and the reverse relay. The utility model has the following advantages and effects: the motor in the water pump can be protected, and the phenomenon that the motor in the water pump is burnt out is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of water pumps, in particular to a built-in protection device of a water pump.
Background
At present, most of water pumps in the market are directly powered by three-phase electricity. If faults such as overcurrent, overload, no water, phase loss, overheating and locked rotor occur to the water pump, insufficient torque of the motor can be caused, and the motor can be burnt out seriously and even occurs.
Therefore, the existing requirements are not met, and the built-in protection device of the water pump is provided for the requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a built-in protection device of a water pump, which aims to solve the problems in the background technology.
The technical purpose of the utility model is realized by the following technical scheme: a built-in protection device of a water pump comprises a power supply module, a relay module and a control module, wherein the front stage of the power supply module is connected with an input power supply of commercial power, and the rear stage of the power supply module supplies power to the relay module and the control module;
the control module comprises a controller, a temperature sensor arranged in the water pump and a mutual inductor connected to an input power supply, wherein the temperature sensor and the mutual inductor are respectively connected with the controller;
the relay module comprises a forward relay for controlling the normal operation of the water pump and a reverse relay for controlling the reverse operation of the water pump, the forward relay and the reverse relay are respectively connected with the controller, and the controller switches the suction/cut-off states of the forward relay and the reverse relay.
The further setting is that: the mutual inductor comprises a first mutual inductor, a second mutual inductor and a third mutual inductor which are respectively connected to three phases of an input power supply.
The further setting is that: the power module comprises a first power module and a second power module, wherein the first power module rectifies and reduces the input power of the commercial power to a first output power and then supplies power to the relay module, and the second power module continuously reduces the first output power to a second output voltage and then supplies power to the control module.
The further setting is that: the first power supply module comprises a transformer T1 and a rectifier bridge Z1, the front stage of the transformer T1 is connected with an input power supply of a commercial power, the rear stage of the transformer T1 is connected with the front stage of the rectifier bridge Z1, and the rear stage of the rectifier bridge Z1 outputs a first output power supply to supply power for the relay module;
the second power supply module comprises a linear voltage stabilizer U1, the front stage of the linear voltage stabilizer U1 is connected with the rear stage of the rectifier bridge Z1, and the rear stage outputs a second output voltage to supply power for the control module.
The utility model has the beneficial effects that:
1. the utility model detects whether the water pump is in a phase-lacking state by arranging the mutual inductor to collect three-phase current of an input power supply, and simultaneously realizes the judgment of overcurrent and overload through the controller; the temperature sensor is arranged to detect the temperature inside the water pump, and when the temperature inside the water pump is higher than the set overheat temperature, the motor stops running to protect the safety of the motor inside the water pump; the utility model controls the normal operation of the water pump by arranging the forward rotation relay and controls the reverse rotation of the water pump by arranging the reverse rotation relay, thereby achieving the purposes of clearing foreign matters blocked in the water channel and dredging the water channel. Through above-mentioned structure, come the motor in the effectual protection water pump, the phenomenon that motor burns out in the greatly reduced water pump.
2. According to the utility model, the first power supply module and the second power supply module are arranged to rectify and reduce the voltage of the input power of the commercial power, so that a proper power supply voltage is obtained, and the structure is more integrated; and the linear voltage regulator U1 can effectively provide a stable voltage for the controller.
Drawings
FIG. 1 is a functional block diagram of a relay module and a control module in an embodiment;
FIG. 2 is a schematic block diagram of a power module in an embodiment;
FIG. 3 is a detailed circuit diagram of an embodiment of a power module;
fig. 4 is a schematic block diagram of a relay module and a control module in an embodiment (without adding a reverse relay).
In the figure: 11. a controller; 12. a temperature sensor; 13. a first transformer; 14. a second transformer; 15. a third transformer; 21. a forward rotation relay; 22. a reverse relay; 31. a first power supply module; 32. and a second power supply module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, a water pump built-in protection device comprises a power module, a relay module and a control module, wherein the front stage of the power module is connected with an input power supply of commercial power, and the rear stage of the power module supplies power to the relay module and the control module;
the control module comprises a controller 11, a temperature sensor 12 arranged in the water pump and a mutual inductor connected to an input power supply, wherein the temperature sensor 12 and the mutual inductor are respectively connected with the controller 11;
the relay module comprises a forward relay 21 for controlling the normal operation of the water pump and a reverse relay 22 for controlling the reverse operation of the water pump, wherein the forward relay 21 and the reverse relay 22 are respectively connected with the controller 11, and the controller 11 switches the suction/cut-off state of the forward relay 21 and the reverse relay 22.
The transformers comprise a first transformer 13, a second transformer 14 and a third transformer 15 which are respectively connected to three phases of an input power supply.
The power module comprises a first power module 31 for rectifying and reducing the input power of the mains supply to a first output power and then supplying power to the relay module, and a second power module 32 for continuously reducing the first output power to a second output voltage and then supplying power to the control module.
The first power module 31 comprises a transformer T1 and a rectifier bridge Z1, wherein the front stage of the transformer T1 is connected with an input power of a mains supply, the rear stage of the transformer T1 is connected with the front stage of the rectifier bridge Z1, and the rear stage of the rectifier bridge Z1 outputs a first output power to supply power to the relay module;
the second power module 32 comprises a linear voltage regulator U1, the front stage of the linear voltage regulator U1 is connected with the rear stage of the rectifier bridge Z1, and the rear stage outputs a second output voltage to supply power to the control module. The linear regulator U1 in this embodiment may employ 78L 05.
The working principle of the embodiment is as follows:
after the 220V/380V input power supply, the controller 11 controls the forward rotation relay 21 to suck, and the water pump is in a normal water pumping state; if the controller 11 detects a certain time t1When the water pump is always in the water-free state, the forward rotation relay 21 is cut off to stop the motor, and the motor waits for a certain time t2Then, the controller 11 controls the forward rotation relay 21 to suck again, and the operation is repeated, so that the controller 11 detects whether the water pump is in a water-containing state or a water-free state all the time; detecting whether the water pump is in a phase-lacking state or not according to the existence of three-phase current of the water pump, and immediately cutting off the operation of the water pump by cutting off the forward rotation relay 21 to protect the motor if the water pump is in the phase-lacking state; by detecting the three-phase current of the water pump, if the current exceeds N times of the rated current of the water pump, the water pump can be judged to be in an overcurrent, overload or locked-rotor state, the forward rotation relay 21 is cut off, the water pump is stopped, and the water pump waits for a certain time t3Then, the reverse rotation relay 22 is actuated to enable the water pump to be in a reverse rotation state, foreign matters blocked in the water channel are cleaned through the reverse rotation of the water pump, the water channel is dredged, and the reverse rotation operation is carried out for a certain time t4Thereafter, the reverse relay 22 is turned off, and the operation waits for a predetermined time t5Then, attracting the forward rotation relay 21 to enable the water pump to be in a normal pumping state, repeating the action if the water pump is in a locked-rotor state by detecting current, normally operating if the motor is in the normal pumping state, and stopping the operation if the motor is in the locked-rotor state after repeating the action for 3 times; by detecting the temperature sensor 12 arranged in the water pump, if the temperature in the water pump is higher than the set overheat temperature Tc, the water pump stops running and the motor is protected.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a built-in protection device of water pump which characterized in that: the power supply comprises a power supply module, a relay module and a control module, wherein the front stage of the power supply module is connected with an input power supply of commercial power, and the rear stage of the power supply module supplies power to the relay module and the control module;
the control module comprises a controller (11), a temperature sensor (12) arranged in the water pump and a mutual inductor connected to an input power supply, wherein the temperature sensor (12) and the mutual inductor are respectively connected with the controller (11);
the relay module comprises a forward relay (21) for controlling the water pump to normally operate and a reverse relay (22) for controlling the water pump to reversely operate, wherein the forward relay (21) and the reverse relay (22) are respectively connected with the controller (11), and the controller (11) switches the suction/cut-off states of the forward relay and the reverse relay.
2. The water pump built-in protection device of claim 1, characterized in that: the mutual inductor comprises a first mutual inductor (13), a second mutual inductor (14) and a third mutual inductor (15) which are respectively connected to three phases of an input power supply.
3. The water pump built-in protection device of claim 1, characterized in that: the power module comprises a first power module (31) for rectifying and reducing the voltage of the input power of the commercial power to a first output power and then supplying power to the relay module, and a second power module (32) for continuously reducing the voltage of the first output power to a second output voltage and then supplying power to the control module.
4. The built-in protection device of the water pump according to claim 3, characterized in that: the first power supply module (31) comprises a transformer T1 and a rectifier bridge Z1, the front stage of the transformer T1 is connected with an input power supply of a commercial power, the rear stage of the transformer T1 is connected with the front stage of the rectifier bridge Z1, and the rear stage of the rectifier bridge Z1 outputs a first output power supply to supply power for the relay module;
the second power supply module (32) comprises a linear voltage stabilizer U1, the front stage of the linear voltage stabilizer U1 is connected with the rear stage of the rectifier bridge Z1, and the rear stage outputs a second output voltage to supply power for the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122240828.2U CN215805101U (en) | 2021-09-15 | 2021-09-15 | Built-in protection device of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122240828.2U CN215805101U (en) | 2021-09-15 | 2021-09-15 | Built-in protection device of water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215805101U true CN215805101U (en) | 2022-02-11 |
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ID=80161002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122240828.2U Active CN215805101U (en) | 2021-09-15 | 2021-09-15 | Built-in protection device of water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215805101U (en) |
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2021
- 2021-09-15 CN CN202122240828.2U patent/CN215805101U/en active Active
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