CN218995916U - Control system for preventing water pump from blocking - Google Patents
Control system for preventing water pump from blocking Download PDFInfo
- Publication number
- CN218995916U CN218995916U CN202222910211.1U CN202222910211U CN218995916U CN 218995916 U CN218995916 U CN 218995916U CN 202222910211 U CN202222910211 U CN 202222910211U CN 218995916 U CN218995916 U CN 218995916U
- Authority
- CN
- China
- Prior art keywords
- contactor
- water pump
- controller
- intermediate relay
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a control system for preventing water pump from blocking, which comprises a controller, a plurality of current sensors, a plurality of contactors, a plurality of intermediate relays and a change-over switch, wherein the controller is used for realizing reversal control when the water pump is blocked through the cooperation of the contactors and the intermediate relays based on A, B, C three-phase current collected by the current sensors. The utility model can detect the current in real time, identify the normal running current and the water pump locked-rotor current, and drive the forward and reverse rotation contactor to automatically adjust the water pump phase sequence, thereby realizing the automatic control and fault elimination when the water pump is blocked, and saving the manpower.
Description
Technical Field
The utility model relates to the field of water pump control systems, in particular to a control system for preventing water pump from blocking.
Background
The common control cabinet can detect the current of the water pump in real time and can realize the reverse rotation of the water pump, but the interlocking is not realized. After the water pump is locked, the water pump can be maintained or the water pump phase sequence can be adjusted to enable the water pump to rotate reversely, so that sundries are discharged, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
The utility model provides a control system for preventing water pump from blocking, which solves the problem that automatic control and fault removal are difficult to realize when the water pump is blocked in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a control system for water pump anti-lock changes, U, V, W power end of water pump passes through overload relay FR 1's coil and connects live wire L1, L2, L3 respectively, including controller, current sensor B1-B3, contactor KM1-KM2, intermediate relay KA1-KA4, change over switch SA1, wherein:
the current sensors B1, B2 and B3 respectively collect the current of the phase A, the phase B and the phase C, and the output ends of the current sensors B1, B2 and B3 are respectively connected with different input ends of the controller;
one switch path of the change-over switch SA1 is connected with a normally closed contact of the push-button switch SB3, the push-button switch SB1 and the intermediate relay KA4, a normally closed contact of the contactor KM2 and a coil of the intermediate relay KA1 in series in sequence to form a first series branch, wherein the push-button switch SB1 is connected with a normally open contact of the contactor KM1 in parallel, and the first series branch is connected between the live wire L3 and the zero line N;
the intermediate relay KA2 is sequentially connected with a normally-closed contact of the contactor KM1, a normally-closed contact of the intermediate relay KA4 and the button switch SB2 in series to form a second series branch, wherein the button switch SB2 is connected with a normally-open contact of the contactor KM2 in parallel, one end of the second series branch corresponding to the contactor KM1 is connected with a zero line N, and one end of the second series branch corresponding to the button switch SB2 is connected between the button switch SB3 and the button switch SB1 in the first series branch;
the other switching circuit of the change-over switch SA1 is sequentially connected with a normally closed contact of the intermediate relay KA4 and a coil of the intermediate relay KA3 in series to form a third series branch, and the third series branch is connected between the live wire L3 and the zero wire N;
one end of a coil of the intermediate relay KA4, one end of a coil of the contactor KM1 and one end of a coil of the contactor KM2 are respectively connected with a zero line N, and the other end of the coil of the intermediate relay KA4, the other end of the coil of the contactor KM1 and the other end of the coil of the contactor KM2 are respectively connected with different input ends of the controller;
the contactor KM1 is provided with a normally open contact connected to a live wire inlet wire of a power end of the water pump U, V, W, and the contactor KM2 is provided with a normally open contact connected in parallel with the contactor KM1 connected to the live wire inlet wire of the water pump;
the controller also has an output end which realizes manual forward rotation through a normally open contact of the intermediate relay KA1, the controller also has an output end which realizes manual reverse rotation through a normally open contact of the intermediate relay KA2, the controller also has an output end which realizes overload input through a normally open contact of the overload relay FR1, and the controller also has an output end which realizes automatic operation through a normally open contact of the intermediate relay KA 3.
Further, the power supply device also comprises an AC-DC conversion chip, wherein the input end of the AC-DC conversion chip is connected with the live wire L3 and the zero wire N, and the output end of the AC-DC conversion chip is respectively connected with the controller and each current sensor to supply power.
Further, the power supply indicator lamp HL1 is further included, and the power supply indicator lamp HL1 is connected between the live wire L3 and the zero wire N.
Further, the contactor also comprises a forward rotation indicator lamp HL2, wherein the forward rotation indicator lamp HL2 is connected with one normally open contact of the contactor KM1 in series and then connected between the live wire L3 and the zero wire N.
Further, the contactor also comprises a reverse indicator lamp HL3, wherein the reverse indicator lamp HL3 is connected in series with one normally open contact of the contactor KM2 and then is connected between the live wire L3 and the zero wire N.
Further, the electric power supply further comprises a fault indicator lamp HL4, wherein the fault indicator lamp HL4 is connected with one normally open contact of the intermediate relay KA4 in series and then connected between the live wire L3 and the zero wire N.
The utility model can detect the current in real time, identify the normal running current and the water pump locked-rotor current, drive the forward and reverse contactor to automatically adjust the water pump phase sequence, realize the reverse rotation of the water pump and discharge sundries, thereby realizing the automatic control and fault elimination when the water pump is blocked, and saving the manpower.
Drawings
FIG. 1 is a schematic diagram of a portion of a water pump in accordance with an embodiment of the present utility model.
Fig. 2 is a diagram of a portion of a wiring diagram of a controller in an embodiment of the utility model.
Fig. 3 is a panel diagram of a controller.
Fig. 4 is a control cabinet panel layout.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 1, 2, 3 and 4, the embodiment discloses a control system for preventing blocked rotation of a water pump, which comprises a water pump controller with the model of HXFD-02, current sensors B1-B3 with the model of BA10, contactors KM1-KM2, intermediate relays KA1-KA4, a transfer switch SA1 and an AC-DC conversion chip.
The U, V, W power end of the water pump M1 sequentially passes through a coil of the overload relay FR1, a normally open contact of the contactor KM1, a current sensor B1 and a breaker QF1 to be correspondingly connected with a live wire L1, a live wire L2 and a live wire L3 respectively, and the normally open contact of the contactor KM1 in the branch is connected with a normally open contact of the contactor KM2 in parallel, wherein the current sensor BA10 is used for detecting the input current of the water pump.
The live wire L3 is branched out through the fuse FU1, the input end of the AC-DC conversion chip is connected with the branched out path of the live wire L3 and the zero line N, and the output end of the AC-DC conversion chip is respectively connected with the power end of the water pump controller (namely the power end pins 13 and 14 of the water pump controller) and the power end of each current sensor (namely the power end pins 1 and 2 of the current sensor), and the AC-DC conversion chip converts the AC into the DC and then supplies the DC to the water pump controller and each current sensor.
The current sensors B1, B2 and B3 respectively collect the current of the phase A, the phase B and the phase C correspondingly, and the output ends of the current sensors B1, B2 and B3 (namely the pins 3 and 4 of the current sensors) are respectively connected with different input ends of the water pump controller. That is, the pins 3 and 4 of the current sensor B1 are connected to the pins 1 and 2 of the input terminal of the water pump controller, the pins 3 and 4 of the current sensor B2 are connected to the pins 3 and 4 of the input terminal of the water pump controller, and the pins 3 and 4 of the current sensor B3 are connected to the pins 5 and 6 of the input terminal of the water pump controller. Therefore, the current sensors B1, B2 and B3 can correspondingly collect the currents of the phase A, the phase B and the phase C, and the currents can be transmitted to the water pump controller.
A switching path of the change-over switch SA1 is connected with a normally closed contact of the push-button switch SB3, the push-button switch SB1 and the intermediate relay KA4, a normally closed contact of the contactor KM2 and a coil of the intermediate relay KA1 in series in sequence to form a first series branch, wherein the push-button switch SB1 is connected with a normally open contact of the contactor KM1 in parallel, and the first series branch is connected between a live wire L3 branching path and a zero line N;
the intermediate relay KA2 is sequentially connected with a normally-closed contact of the contactor KM1, a normally-closed contact of the intermediate relay KA4 and the button switch SB2 in series to form a second series branch, wherein the button switch SB2 is connected with a normally-open contact of the contactor KM2 in parallel, one end of the second series branch corresponding to the contactor KM1 is connected with a zero line N, and one end of the second series branch corresponding to the button switch SB2 is connected between the button switch SB3 and the button switch SB1 in the first series branch.
The other switching path of the change-over switch SA1 is connected with a normally closed contact of the intermediate relay KA4 and a coil of the intermediate relay KA3 in series in sequence to form a third series branch, and the third series branch is connected between the live wire L3 separating path and the zero line N.
The coil one end of intermediate relay KA4, the coil one end of contactor KM1, the coil one end of contactor KM2 connect zero line N respectively, and the coil other end of intermediate relay KA4, the coil other end of contactor KM1, the coil other end of contactor KM2 correspond respectively and connect water pump controller's input pin 17, input pin 20, input pin 21. The input terminal pin 16 of the water pump controller is also connected with the live wire L3 branch way.
The output pin 8 of the water pump controller realizes manual forward rotation through the normally open contact of the intermediate relay KA1, the output pin 10 of the water pump controller realizes manual reverse rotation through the normally open contact of the intermediate relay KA2, the output pin 11 of the water pump controller realizes overload input through the normally open contact of the overload relay FR1, and the output pin 12 of the water pump controller realizes automatic operation through the normally open contact of the intermediate relay KA 3.
The present embodiment further includes a power supply indicator lamp HL1, a forward rotation indicator lamp HL2, a reverse rotation indicator lamp HL3, a malfunction indicator lamp HL4. The power indicator lamp HL1 is connected between the live wire L3 branch way and the zero line N; the forward rotation indicator lamp HL2 is connected in series with one normally open contact of the contactor KM1 and then connected between a live wire L3 branch way and a zero line N; the reverse indicator lamp HL3 is connected in series with one normally open contact of the contactor KM2 and then connected between a live wire L3 branch way and a zero line N; the fault indicator lamp HL4 is connected in series with one normally open contact of the intermediate relay KA4 and then connected between the live wire L3 branch way and the neutral wire N.
The control process of the embodiment is as follows:
when SA1 is switched on to a manual gear, the SB1 forward rotation button is pressed, the KA1 coil is electrified so that the opening point of the KA1 is closed, then the KA1 is self-locked, the input terminals (7 and 8) of the controller are conducted, the output terminals (16 and 21) of the controller are driven to be conducted, the KM1 coil is attracted, and the motor realizes forward rotation. When the SB3 stop button is pressed or SA1 leaves the manual gear, the KA1 coil is powered off so that the opening point of the KA1 is disconnected, then the input terminals (7 and 8) of the controller are disconnected, the output terminals (16 and 21) of the controller are driven to be disconnected, and therefore the KM1 coil is powered off, and the motor is stopped.
The controller input terminals (7 and 8) are turned on, i.e. the motor rotates forward when there is a manual forward signal. After a time delay (namely starting time), avoiding starting current (because the starting current is 7 times of working current), detecting three-phase current, wherein any phase current is larger than 'locked-rotor current' (the locked-rotor current setting value is 0-99A, different locked-rotor currents can be set according to the power of the water pump), and the 'locked-rotor time' (the controller starts to count when the locked-rotor current is monitored, the locked-rotor time setting value is 0-9.9 seconds and the initial value is 0.4 seconds), stopping the water pump (the controller drives output terminals 16 and 21 to be disconnected, a KM1 coil is powered off), outputting a fault relay KA4 (the controller drives the output terminals 16 and 17 to be conducted, KA4 is powered on), turning on a panel locked-rotor indicating lamp of the controller and a fault indicating lamp HL4 of the control cabinet, and the internal self-locking fault state of the controller can be maintained even if the power fails.
When SA1 is switched on to a manual gear, the SB2 reversing button is pressed, the KA2 coil is electrified so that the opening point of the KA2 is closed, then the KA2 is self-locked, the input terminals (7 and 10) of the controller are conducted, the output terminals (16 and 20) are driven to be conducted by the controller, the KM2 coil is attracted, and the motor is reversed. When the SB3 stop button is pressed or the SA1 leaves the manual gear, the KA2 coil is powered off so that the opening point of the KA2 is restored to be in a normally-off state, then the controller terminals (7 and 10) are disconnected, the controller drives the output terminals (16 and 20) to be disconnected, the KM2 coil is powered off, and the motor is stopped.
The controller input terminals (7 and 10) are turned on, i.e. the motor rotates forward when there is a manual forward signal. After a time delay (namely starting time), avoiding starting current (because the starting current is 7 times of working current), detecting three-phase current, wherein any phase current is larger than 'locked-rotor current' (the locked-rotor current setting value is 0-99A, different locked-rotor currents can be set according to the power of the water pump), and the 'locked-rotor time' (the controller starts to count when the locked-rotor current is monitored, the locked-rotor time setting value is 0-9.9 seconds and the initial value is 0.4 seconds), stopping the water pump (the controller drives output terminals 16 and 20 to be disconnected, a KM2 coil is powered off), outputting a fault relay KA4 (the controller drives the output terminals 16 and 17 to be conducted, KA4 is powered on), a panel locked-rotor indicating lamp of the controller is on, a panel fault indicating lamp HL4 of the control cabinet is on, and the internal self-locking fault state of the controller can be maintained even if the power fails.
When SA1 is started to automatic gear, automatic relay KA3 is powered on, so that the opening point of KA3 is closed, input terminals (7 and 12) of the controller are conducted, and the controller automatically operates the water pump through internal logic judgment.
The input terminals (7 and 12) of the controller are conducted, and when an automatic operation signal exists, the output terminals (16 and 21) are driven to be conducted by the controller, so that the KM1 coil is attracted, and the motor rotates positively. After a delay time (namely starting time) and avoiding starting current (because the starting current is 7 times of working current), the control cabinet detects motor current once every 10ms, any phase current is larger than 'locked-rotor current' (the locked-rotor current setting value is 0-99A, different locked-rotor currents can be set according to the water pump power) and exceeds 'locked-rotor time' (the controller starts to count when detecting the locked-rotor current, the locked-rotor time setting value is 0-9.9 seconds and the initial value is 0.4 seconds), and then the water pump stops running (the controller drives the output terminals 16 and 21 to be disconnected and the KM1 coil loses power). After a delay time (namely forward and reverse rotation interval time, the forward and reverse rotation interval time is set at the value of 0-9.9 seconds and the initial value of 5 seconds), the controller drives the output terminals 16 and 20 to be conducted, so that the KM2 coil is attracted, the water pump is reversed for one circle (namely the reverse rotation time is set at the value of 0-9.9 seconds and the initial value of 1.8 seconds), and the water pump stops rotating after the plug is discharged (the controller drives the output terminals 16 and 20 to be disconnected and the KM2 coil loses power). And after a period of time delay (namely, a forward and reverse rotation interval time) is passed, the motor is started to rotate forward again, and after a period of time delay (starting time), the current is detected, and if the three-phase current is smaller than the locked-rotor current within the recovery time (the recovery time set value is 0-99 seconds and the initial value is 20 seconds), the fault is eliminated. If the locked rotor is encountered again, the process is repeated for 9 times at most (namely, the locked rotor times are set to be 0-9 times and the initial value is 3 times) until normal operation is restored, if the repeated times reach the set times, the water pump stops running, the fault relay KA4 outputs, the controller locked rotor indicator lamp is on, the control strand panel fault indicator lamp HL4 is on, and the self-locking fault state is maintained even if the power failure fault state is also maintained.
The embodiments of the present utility model are merely described in terms of preferred embodiments of the present utility model, and are not intended to limit the spirit and scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model, and the technical content of the present utility model as claimed is fully described in the claims.
Claims (6)
1. A control system for water pump anti-lock changes, U, V, W power end of water pump passes through overload relay FR 1's coil and connects live wire L1, L2, L3 respectively, its characterized in that includes controller, current sensor B1-B3, contactor KM1-KM2, intermediate relay KA1-KA4, change over switch SA1, wherein:
the current sensors B1, B2 and B3 respectively collect the current of the phase A, the phase B and the phase C, and the output ends of the current sensors B1, B2 and B3 are respectively connected with different input ends of the controller;
one switch path of the change-over switch SA1 is connected with a normally closed contact of the push-button switch SB3, the push-button switch SB1 and the intermediate relay KA4, a normally closed contact of the contactor KA2 and a coil of the intermediate relay KA1 in series in sequence to form a first series branch, wherein the push-button switch SB1 is connected with a normally open contact of the contactor KA1 in parallel, and the first series branch is connected between the live wire L3 and the null wire N;
the intermediate relay KA2 is sequentially connected with a normally-closed contact of the contactor KA1, a normally-closed contact of the intermediate relay KA4 and the button switch SB2 in series to form a second series branch, wherein the button switch SB2 is connected with a normally-open contact of the contactor KA2 in parallel, one end of the second series branch corresponding to the contactor KA1 is connected with a zero line N, and one end of the second series branch corresponding to the button switch SB2 is connected between the button switch SB3 and the button switch SB1 in the first series branch;
the other switching circuit of the change-over switch SA1 is sequentially connected with a normally closed contact of the intermediate relay KA4 and a coil of the intermediate relay KA3 in series to form a third series branch, and the third series branch is connected between the live wire L3 and the zero wire N;
one end of a coil of the intermediate relay KA4, one end of a coil of the contactor KM1 and one end of a coil of the contactor KM2 are respectively connected with a zero line N, and the other end of the coil of the intermediate relay KA4, the other end of the coil of the contactor KM1 and the other end of the coil of the contactor KM2 are respectively connected with different input ends of the controller;
the contactor KM1 is provided with a normally open contact connected to a live wire inlet wire of a power end of the water pump U, V, W, and the contactor KM2 is provided with a normally open contact connected in parallel with the contactor KM1 connected to the live wire inlet wire of the water pump;
the controller also has an input end which realizes manual forward rotation through a normally open contact of the intermediate relay KA1, the controller also has an input end which realizes manual reverse rotation through a normally open contact of the intermediate relay KA2, the controller also has an input end which realizes overload input through a normally open contact of the overload relay FR1, and the controller also has an input end which realizes automatic operation through a normally open contact of the intermediate relay KA 3.
2. The control system for preventing water pump from being blocked according to claim 1, further comprising an AC-DC conversion chip, wherein an input end of the AC-DC conversion chip is connected to the live line L3 and the neutral line N, and an output end of the AC-DC conversion chip is connected to the controller and each current sensor respectively to supply power.
3. A control system for preventing water pump stall as claimed in claim 1, further comprising a power indicator HL1, wherein the power indicator HL1 is connected between the live line L3 and the neutral line N.
4. The control system for preventing water pump from being blocked according to claim 1, further comprising a forward rotation indicator lamp HL2, wherein the forward rotation indicator lamp HL2 is connected in series with a normally open contact of the contactor KM1 and then connected between the live line L3 and the neutral line N.
5. The control system for preventing water pump from being blocked according to claim 1, further comprising a reverse indicator lamp HL3, wherein the reverse indicator lamp HL3 is connected in series with a normally open contact of the contactor KM2 and then connected between the live line L3 and the neutral line N.
6. The control system for preventing water pump from being blocked as claimed in claim 1, further comprising a fault indicator HL4, wherein the fault indicator HL4 is connected in series with a normally open contact of the intermediate relay KA4 and then connected between the live line L3 and the neutral line N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222910211.1U CN218995916U (en) | 2022-11-02 | 2022-11-02 | Control system for preventing water pump from blocking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222910211.1U CN218995916U (en) | 2022-11-02 | 2022-11-02 | Control system for preventing water pump from blocking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218995916U true CN218995916U (en) | 2023-05-09 |
Family
ID=86192820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222910211.1U Active CN218995916U (en) | 2022-11-02 | 2022-11-02 | Control system for preventing water pump from blocking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218995916U (en) |
-
2022
- 2022-11-02 CN CN202222910211.1U patent/CN218995916U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202435320U (en) | Protection circuit of soft starter | |
| CN103022959A (en) | Method and device for adhesion detection of main contact of alternating-current contactor | |
| CN201846292U (en) | Device capable of starting oil pump motors at different times | |
| CN106787973A (en) | Drive control device and method for yaw motor of wind generating set | |
| CN218995916U (en) | Control system for preventing water pump from blocking | |
| CN205791480U (en) | Envelope star control circuit | |
| CN204578070U (en) | Open-phase protection circuit of motor | |
| CN201146405Y (en) | Intelligent double power supply road-changing device | |
| CN201717618U (en) | Microcomputer protecting deice with anti-bouncing function | |
| CN103856338A (en) | Automatic bypass device and method for tandem connection of communication device | |
| CN2769553Y (en) | Screw pump turnback controller | |
| CN113765073A (en) | Intelligent circuit breaker | |
| CN202872701U (en) | Control device for three-phase alternating-current motors | |
| CN103138226A (en) | Automatic reclosing device with load detection function separated from breaker and control method thereof | |
| CN208348035U (en) | Water pump control circuit and water pump | |
| CN202602578U (en) | Three-phase motor short circuit brake control circuit with tap switches | |
| CN202837870U (en) | Electric control system of novel electric hydraulic grab bucket | |
| CN201797302U (en) | Protective device for lifting of heavy crown block | |
| CN105958445A (en) | Motor overloading protection circuit for electric actuator | |
| CN206571863U (en) | A kind of thruster of brake controller | |
| CN100589051C (en) | Automatic change-over switch for intelligent adjusting power supply of drive motor | |
| CN111313370A (en) | Power supply open-phase protection circuit of alternating current servo speed regulation system | |
| CN2220698Y (en) | Protector for motor a.c. contactor adhesion | |
| CN204334113U (en) | A kind of automatic change-over driver control system with triple protection | |
| CN200973063Y (en) | Star delta forward backward starter for motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |