CN214499372U - Constant pressure water supply system based on frequency converter - Google Patents
Constant pressure water supply system based on frequency converter Download PDFInfo
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- CN214499372U CN214499372U CN202023226260.0U CN202023226260U CN214499372U CN 214499372 U CN214499372 U CN 214499372U CN 202023226260 U CN202023226260 U CN 202023226260U CN 214499372 U CN214499372 U CN 214499372U
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- inverter
- converter
- supply system
- pressure
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Abstract
The utility model discloses a constant voltage water supply system based on converter relates to the water supply technology field, include the water pump, be used for control the control circuit of water pump motor rotational speed, control circuit is equipped with converter and pressure sensor, pressure sensor be used for with the water pressure conversion of water pump outlet pipe is the water pressure signal of telecommunication, the water pump is connected the converter, the converter be used for the basis the water pressure signal of telecommunication is adjusted the rotational speed of water pump motor. The hydraulic pressure signal of detecting through the pressure sensor who sets up on the water pump outlet pipe sends the control end of converter to, sets for the pressure value of workshop water through the converter, and the hydraulic pressure signal of converter through contrastive analysis pressure sensor conveying and the water pressure value of setting for adjust the rotational speed of water pump motor, guarantee that the water of workshop maintains invariable pressure.
Description
Technical Field
The utility model relates to a water supply technical field, in particular to constant voltage water supply system based on converter.
Background
The workshop generally adopts traditional power frequency water supply mode, relies on the specific operating frequency water supply of water pump promptly, has uncertainty by the workshop water consumption, and when required water consumption is big, outlet conduit water pressure not enough can influence production, and required water consumption is little, and outlet conduit pressure is too high, can directly influence the life of motor, the pump body.
Disclosure of Invention
To above defect, the utility model aims at providing a constant voltage water supply system based on converter can guarantee that the water of workshop maintains invariable pressure according to the required water consumption adjustment water pump motor's of workshop rotational speed.
In order to realize the purpose, the technical scheme of the utility model is that:
constant voltage water supply system based on converter includes the water pump, is used for control the control circuit of water pump motor rotational speed, control circuit is equipped with converter and pressure sensor, pressure sensor be used for with the water pressure of water pump outlet pipe converts the water pressure signal of telecommunication into, the water pump is connected the converter, the converter is used for the basis the water pressure signal of telecommunication is adjusted the rotational speed of water pump motor.
Preferably, the control circuit comprises a manual control circuit and an automatic control circuit, and the automatic control circuit is provided with the frequency converter and the pressure sensor.
Preferably, the manual control circuit and the automatic control circuit are switched by a three-position switch.
Preferably, the control circuit includes a motor protector, a first contactor, a second contactor, a relay, a start button, and a stop button.
Preferably, the automatic control circuit includes the series connection the normally closed contact of stop button a normally closed contact of first contactor a normally open contact of start button and the coil of second contactor, a normally open contact of second contactor with the start button is parallelly connected, the coil of relay with the coil of second contactor is parallelly connected.
Preferably, one end of a normally open contact of the relay is connected with the input end of the frequency converter, the other end of the normally open contact of the relay is connected with a common terminal COM pin of the frequency converter, and the pressure sensor is connected with the control end of the frequency converter.
Preferably, the frequency converter is a QD800 type frequency converter, one end of a normally open contact of the relay is connected with an input end pin X1 or X2 of the frequency converter, the other end of the normally open contact of the relay is connected with a common terminal COM pin of the frequency converter, and the pressure sensor is respectively connected with an analog input terminal 10V pin, an AI1 pin and a GND pin of the frequency converter.
Preferably, the control circuit still includes circuit protector, manual control circuit includes the series connection stop button's normally closed contact a normally closed contact of second contactor a normally open contact of start button the coil of first contactor and circuit protector's normally closed contact, a normally open contact of first contactor with start button is parallelly connected.
Preferably, the three-phase input end R, S and the T pin of the frequency converter are respectively connected with the live wire ends L1, L2 and L3 of a three-phase power supply, and the three-phase output end U, V and the W pin of the frequency converter are both connected with the water pump motor.
Preferably, the public end of the three-position switch is electrically connected with the live wire end of the power supply, one end of the manual control circuit is connected with the manual end of the three-position switch, one end of the automatic control circuit is connected with the automatic end of the three-position switch, and the other end of the manual control circuit and the other end of the automatic control circuit are electrically connected with the zero wire end of the power supply.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
1. the utility model discloses a constant voltage water supply system based on converter, the water pressure signal of telecommunication that sets up the pressure sensor on the water pump outlet pipe and detect sends the control end of converter to, sets for the pressure value of workshop water through the converter, and the water pressure signal of converter through contrastive analysis pressure sensor conveying and the water pressure value of setting for adjust the rotational speed of water pump motor, guarantees that the water of workshop maintains invariable pressure.
2. The utility model provides a converter has the frequency conversion soft start function, to electric wire netting and electrical equipment's impact when having avoided starting the heavy current, has prolonged the life of the water pump motor and the pump body, has guaranteed the normal production in workshop.
3. The utility model discloses a constant voltage water supply system based on converter is adopted the back, has fine balanced energy-conserving effect, compares the way that PLC adjusted for the tradition, the utility model discloses compact structure, economical and practical, manufacturing cost has been reduced.
4. The utility model discloses a constant voltage water supply system based on converter adopts manual, two kinds of automatic operation, and when the converter broke down, automatic switch to manual state. The operation is stopped automatically, so that the rush repair time is ensured, and the normal operation of a workshop is not influenced.
Drawings
FIG. 1 is a wiring diagram of a frequency converter;
fig. 2 is a circuit diagram of an automatic control circuit and a circuit diagram of a manual control circuit.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in figure 1, constant voltage water supply system based on converter, including the water pump, a control circuit for controlling water pump motor M rotational speed, control circuit is equipped with converter and pressure sensor, pressure sensor is used for converting the water pressure of water pump outlet pipe into the water pressure signal of telecommunication in real time, the converter is connected to the water pump, the converter is used for adjusting water pump motor M's rotational speed according to the water pressure signal of telecommunication, the converter of this embodiment adopts the converter of QD800 model, pressure sensor sets up in the water pump outlet pipe, the water pressure signal of pressure sensor feedback is 0V-10V, pressure sensor constitutes self closed loop automatic control system as the feedback source signal, set for the pressure value of workshop water through converter PA-01 parameter.
As shown in fig. 1 and 2 together, the control circuit includes a manual control circuit and an automatic control circuit, and the automatic control circuit is provided with a frequency converter and a pressure sensor. The manual control circuit and the automatic control circuit are switched by a three-position switch SB 3. The control circuit comprises a motor protector FR, a first contactor KM1, a second contactor KM2, a relay KA, a start button SB2 and a stop button SB 1.
As shown in fig. 1 and 2 together, the automatic control circuit comprises a normally closed contact of a stop button SB1, a normally closed contact of a first contactor KM1, a normally open contact of a start button SB2 and a coil of a second contactor KM2 which are connected in series, wherein a normally open contact of the second contactor KM2 is connected in parallel with a start button SB2, and a coil of a relay KA is connected in parallel with a coil of a second contactor KM 2. In the embodiment, one end of a normally open contact of the relay KA is connected with an input end X1 or an input end X2 pin of the frequency converter, and in the embodiment, one end of a normally open contact of the relay KA is connected with an input end X1 pin of the frequency converter, and the other end of the normally open contact of the relay KA is connected with a common terminal COM pin of the frequency converter, and the pressure sensor is respectively connected with an analog input terminal 10V pin, an AI1 pin and a GND pin of the frequency converter. The three-phase input end R, S and the T base pin of converter are connected with live wire end L1, L2 and L3 of three-phase power supply respectively, and the three-phase input end R, S and the T base pin of converter connect the three-phase and exchange 380V power, and the three-phase output end U, V and the W base pin of converter all are connected with water pump motor M.
As shown in fig. 2, the control circuit further comprises a circuit protector, the manual control circuit comprises a normally closed contact of a stop button SB1, a normally closed contact of a second contactor KM2, a normally open contact of a start button SB2, a coil of a first contactor KM1 and a normally closed contact of a circuit protector FR which are connected in series, and the normally open contact of the first contactor KM1 is connected with a start button SB2 in parallel.
As shown in the common figure 1 and the common figure 2, the public end of the three-position switch SB3 is electrically connected with the live wire end L of the power supply, one end of the manual control circuit is connected with the manual end of the three-position switch SB3, one end of the automatic control circuit is connected with the automatic end of the three-position switch SB3, in the embodiment, one end of the manual control circuit is connected with the manual end of the three-position switch SB3 through a fuse FU, one end of the automatic control circuit is connected with the automatic end of the three-position switch SB3 through the fuse FU, and the other end of the manual control circuit and the other end of the automatic control circuit are both electrically connected with the neutral wire end N of the power supply.
As shown in fig. 1 and fig. 2 together, when the three-position switch SB3 is communicated with the automatic control circuit, the start button SB2 is pressed, the first contactor KM1 is not electrified, the second contactor KM2 is electrified, the relay KA is electrified, the frequency converter connected with a normally open contact of the relay KA is started, the hydraulic pressure electric signal detected by the pressure sensor arranged on the water outlet pipe of the water pump is transmitted to the PID regulator of the frequency converter, the pressure value of the workshop water is set through the frequency converter, the frequency converter compares and analyzes the hydraulic pressure electric signal transmitted by the pressure sensor and the set water pressure value, the rotating speed of the water pump motor M is regulated, and the water in the production workshop is ensured to maintain constant pressure. When the three-position switch SB3 is communicated with the manual control circuit, the starting button SB2 is pressed, the first contactor KM1 is electrified, the second contactor KM2 is not electrified, the relay KA is different in point, and the frequency converter cannot be started. The utility model discloses a constant voltage water supply system based on converter adopts manual, two kinds of automatic operation, and when the converter broke down, automatic switch to manual state. The operation is stopped automatically, so that the rush repair time is ensured, and the normal operation of a workshop is not influenced.
The utility model provides a converter has the frequency conversion soft start function, to electric wire netting and electrical equipment's impact when having avoided starting the heavy current, has prolonged the life of the water pump motor and the pump body, has guaranteed the normal production in workshop.
The utility model discloses a constant voltage water supply system based on converter is adopted the back, has fine balanced energy-conserving effect, according to water pump hydrodynamics can know, balanced energy-conserving effect is about 15-25%.
The utility model discloses a constant voltage water supply system based on converter compares the traditional way of adjusting with PLC, the utility model discloses compact structure, economical and practical, manufacturing cost has been reduced.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (10)
1. Constant voltage water supply system based on converter, include the water pump, be used for control the control circuit of water pump motor rotational speed, its characterized in that, control circuit is equipped with converter and pressure sensor, pressure sensor be used for with the water pressure of water pump outlet pipe converts the water pressure signal of telecommunication into, the water pump is connected the converter, the converter is used for the basis the water pressure signal of telecommunication is adjusted the rotational speed of water pump motor.
2. The inverter-based constant pressure water supply system of claim 1, wherein the control circuit comprises a manual control circuit and an automatic control circuit, the automatic control circuit being provided with the inverter and the pressure sensor.
3. The inverter-based constant pressure water supply system of claim 2, wherein the manual control circuit and the automatic control circuit are switched by a three-position switch.
4. The inverter-based constant pressure water supply system of claim 2, wherein the control circuit comprises a motor protector, a first contactor, a second contactor, a relay, a start button, and a stop button.
5. The inverter-based constant-pressure water supply system according to claim 4, wherein the automatic control circuit includes a normally closed contact of the stop button, a normally closed contact of the first contactor, a normally open contact of the start button, and a coil of the second contactor connected in series, a normally open contact of the second contactor is connected in parallel with the start button, and a coil of the relay is connected in parallel with the coil of the second contactor.
6. The inverter-based constant-pressure water supply system according to claim 5, wherein a normally open contact of the relay is connected at one end to an input terminal of the inverter and at the other end to a common terminal COM pin of the inverter, and the pressure sensor is connected to a control terminal of the inverter.
7. The inverter-based constant-pressure water supply system according to claim 6, wherein the inverter is a QD800 type inverter, one end of a normally open contact of the relay is connected to an input terminal X1 or X2 pin of the inverter, the other end is connected to a common terminal COM pin of the inverter, and the pressure sensors are connected to an analog input terminal 10V pin, an AI1 pin and a GND pin of the inverter, respectively.
8. The inverter-based constant-pressure water supply system according to claim 5, wherein the control circuit further comprises a circuit protector, and the manual control circuit comprises a normally closed contact of the stop button, a normally closed contact of the second contactor, a normally open contact of the start button, a coil of the first contactor, and a normally closed contact of the circuit protector connected in series, a normally open contact of the first contactor being connected in parallel with the start button.
9. The inverter-based constant pressure water supply system according to claim 1, wherein the three-phase input terminal R, S and the T-pin of the inverter are connected to live wire terminals L1, L2 and L3 of a three-phase power supply, respectively, and the three-phase output terminal U, V and the W-pin of the inverter are connected to the water pump motor.
10. The inverter-based constant-pressure water supply system according to claim 3, wherein the common terminal of the three-position switch is electrically connected to a live line terminal of a power supply, one terminal of the manual control circuit is connected to the manual terminal of the three-position switch, one terminal of the automatic control circuit is connected to the automatic terminal of the three-position switch, and the other terminal of the manual control circuit and the other terminal of the automatic control circuit are electrically connected to a neutral line terminal of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226260.0U CN214499372U (en) | 2020-12-29 | 2020-12-29 | Constant pressure water supply system based on frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226260.0U CN214499372U (en) | 2020-12-29 | 2020-12-29 | Constant pressure water supply system based on frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499372U true CN214499372U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023226260.0U Active CN214499372U (en) | 2020-12-29 | 2020-12-29 | Constant pressure water supply system based on frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499372U (en) |
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2020
- 2020-12-29 CN CN202023226260.0U patent/CN214499372U/en active Active
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