Energy-saving submersible mixer for sewage treatment

Abstract

The utility model relates to an energy-saving submersible mixer for sewage treatment, which comprises a submersible mixer body, a current transformer, a rectifying circuit, a comparison circuit and a control prompt circuit, and the current transformer, the rectifying circuit, the comparison circuit and the control prompt circuit are arranged in the element box and are electrically connected with the submersible mixer body. When the device works, under the combined action of the rectifying circuit, the comparison circuit, the control prompt circuit, the current transformer and the like, the load working condition of the device can be monitored in real time, and after sludge treatment in a working area is nearly finished, namely, the working current is small (which represents that sludge is nearly completely cleared), the device can work normally. The device can be powered on to work at a certain time interval (sludge in other areas of the sewage pool flows to an operation area again), sound is made to prompt workers (the workers can turn off a main power switch according to needs after sludge in an action area is completely cleared out), the purpose of saving electric energy is correspondingly achieved, and convenience is brought to the workers.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing equipment, in particular to an energy-saving submersible mixer for sewage treatment. Background Art

[0002] Submersible mixer, also known as submersible crusher, is suitable for mixing and crushing sludge and mixing sewage in sewage treatment plants. It can prevent sludge sedimentation, facilitate sewage pump to pump out sewage mixed with sludge, etc., and reduce the process of separate sludge treatment.

[0003] Although the existing submersible mixers meet the production needs to a certain extent, they are limited by the structure and also have some technical problems. Specifically, due to the poor light transmittance of sewage pools, when the submersible mixer mixes and crushes the sludge at the bottom of the pool, the relevant personnel on the pool cannot observe the working conditions of the submersible mixer. In other words, when the amount of sludge in the working area is small, when the staff does not turn off the power switch of the submersible mixer, it will cause unnecessary waste of electricity, and manual observation will also bring inconvenience to the staff. Therefore, it is very necessary to provide a submersible mixer that not only has the function of mixing sludge, but also can achieve energy-saving effects. Utility Model Content

[0004] In order to overcome the drawbacks of existing submersible mixers as described in the background technology due to structural limitations, the utility model provides an energy-saving submersible mixer for sewage treatment based on a submersible mixer body, which not only has the functions of an ordinary submersible mixer, but also can monitor its own working conditions in real time during operation. After the sludge treatment in the operating area is nearly completed, it can be powered on and work at an interval of a certain period of time (the sludge in other areas of the sewage tank flows to the operating area again), and the staff is prompted, thereby achieving the purpose of saving electricity and bringing convenience to the staff.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An energy-saving submersible mixer for sewage treatment comprises a submersible mixer body and a current transformer, and is characterized in that it also comprises a rectifier circuit, a comparison circuit and a control prompt circuit; the current transformer, the rectifier circuit, the comparison circuit and the control prompt circuit are installed in a component box; a phase line of a control power input end of the comparison circuit passes through a central hole of the current transformer, a signal output end of the current transformer is electrically connected to a signal input end of the rectifier circuit, and a signal output end of the rectifier circuit is electrically connected to a signal input end of the comparison circuit; a signal output end of the comparison circuit is electrically connected to a signal input end of the control prompt circuit, and a signal output end of the control prompt circuit is electrically connected to a trigger end of the comparison circuit; a control power output end of the comparison circuit is electrically connected to a power input end of the submersible mixer body.

[0007] Furthermore, the rectifier circuit includes an electrically connected rectifier bridge stack, a capacitor, an adjustable resistor, and a resistor, wherein the positive power supply output end of the rectifier bridge stack is connected to the positive electrode of the capacitor and one end of the adjustable resistor, the negative power supply output end of the rectifier bridge stack is connected to the negative electrode of the capacitor and one end of the first resistor, and the other end of the adjustable resistor is connected to the other end of the first resistor and one end of the second resistor.

[0008] Furthermore, the comparison circuit includes an electrically connected transistor and a resistor, a thyristor, a relay, and a capacitor, the transistor collector is connected to the negative power input terminal of the first relay, the positive power input terminal of the first relay is connected to the control power input terminal, the normally closed contact terminal of the first relay is connected to one end of the resistor, the other end of the resistor is connected to the positive electrode of the capacitor and the control electrode of the thyristor, the cathode of the thyristor is connected to the positive power input terminal of the second relay, and the negative electrode of the capacitor is connected to the negative power input terminal of the second relay and the emitter of the transistor.

[0009] Furthermore, the control prompt circuit includes an electrically connected relay and adjustable resistor, resistor, transistor, buzzer, and capacitor, one end of the adjustable resistor is connected to the positive electrode of the capacitor and one end of the resistor, the other end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input of the relay and the buzzer, the negative electrode of the capacitor is connected to the emitter of the transistor, and the positive power input of the relay and the control power input are connected to the positive power input of the buzzer.

[0010] Compared with the prior art, the utility model has the following beneficial effects: based on the submersible mixer body, the utility model not only has the functions of an ordinary submersible mixer, but also can monitor its own load condition in real time under the joint action of the rectifier circuit, the comparison circuit, the control prompt circuit, the current transformer, etc., when working. When the sludge treatment in the working area is nearly completed, that is, when the working current is small (indicating that the sludge is nearly cleared), it can be powered on after a certain period of time (the sludge in other areas of the sewage pool flows to the working area again), and sound prompts the staff (the staff can turn off the main power switch after the sludge in the working area is cleared according to the needs), which achieves the purpose of saving electricity and brings convenience to the staff. Based on the above, the utility model has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0014] Figure 1 , 2As shown in the figure, an energy-saving submersible mixer for sewage treatment includes a submersible mixer body M1, a current transformer M, a power module W1, and also has a rectifier circuit 1, a comparison circuit 2, and a control prompt circuit 3; the current transformer M, the power module W1, the rectifier circuit 1, the comparison circuit 2, and the control prompt circuit 3 are installed on a circuit board in a component box 4, and the component box 4 is located in an onshore electric control box such as a sewage tank.

[0015] Figure 1 , 2 As shown in the figure, the rectifier circuit includes a rectifier bridge stack W2, a capacitor C1, an adjustable resistor RP1, resistors R2 and R3 connected via circuit board wiring, the positive power output terminal 3 of the rectifier bridge stack W2 is connected to the positive electrode of the capacitor C1 and one end of the adjustable resistor RP1, the negative power output terminal 4 of the rectifier bridge stack W2 is connected to the negative electrode of the capacitor C1 and one end of the first resistor R2, and the other end of the adjustable resistor RP1 is connected to the other end of the first resistor R2 and one end of the second resistor R3. The comparison circuit includes a transistor Q1 and a resistor R4, a thyristor VS, relays K and K1, and a capacitor C connected through circuit board wiring. The collector of the transistor Q1 is connected to the negative power input terminal of the first relay K, the positive power input terminal of the first relay K is connected to the control power input terminal, the normally closed contact terminal of the first relay K is connected to one end of the resistor R4, the other end of the resistor R4 is connected to the positive electrode of the capacitor C and the control electrode of the thyristor VS, the cathode of the thyristor VS is connected to the positive power input terminal of the second relay K1, and the negative electrode of the capacitor C is connected to the negative power input terminal of the second relay K1 and the emitter of the transistor Q1. The control prompt circuit includes a relay K2 and an adjustable resistor RP2, a resistor R5, a transistor Q3, an alarm BX, and a capacitor C2 connected through circuit board wiring. One end of the adjustable resistor RP2 is connected to the positive electrode of the capacitor C2 and one end of the resistor R5. The other end of the resistor R5 is connected to the base of the transistor Q3. The collector of the transistor Q3 is connected to the negative power input end of the relay K2 and the alarm BX. The negative electrode of the capacitor C2 is connected to the emitter of the transistor Q3. The positive power input end of the relay K2 and the control power input end are connected to the positive power input end of the alarm BX.

[0016] Figure 1 , 2As shown, the power input terminals 1 and 2 of the power module W1, the two control power input terminals of the relay K1 of the comparison circuit and the two poles of the AC 220V power supply are connected via wires respectively, the phase line of the control power input terminal of the comparison circuit passes through the central hole of the current transformer M, and the two secondary terminals of the current transformer M and the 1 and 2 pins of the rectifier bridge stack W2 at the signal input terminal of the rectifier circuit are connected via wires respectively. The other end of the resistor R3 at the signal output terminal of the rectifier circuit and the base of the transistor Q1 at the signal input terminal of the comparison circuit are connected via wires. The cathode of the thyristor VS of the comparison circuit is connected to the other end of the adjustable resistor RP2 of the control prompt circuit, and the anode of the thyristor VS is connected to the normally closed contact end of the relay K2 via wires. The two normally closed contact ends of the relay K1 at the control power output terminal of the comparison circuit and the two ends of the power input of the submersible mixer body M1 are connected via wires respectively. The power output terminals 3 and 4 of the power module W1 are connected to the positive power input terminal of the comparison circuit, the positive power input terminal of the relay K, and the emitter of the transistor Q1, and the positive power input terminal of the control prompt circuit, the positive power input terminal of the relay K2, and the emitter of the transistor Q3, respectively, through wires. The negative electrode of the capacitor C1 is connected to the 4th pin of the power module W1 through a wire.

[0017] Figure 1 , 2As shown, the new type is based on the submersible mixer body M1. The use process is the same as that of ordinary submersible mixers. It is placed in the corresponding area of ​​the sewage pool. The submersible mixer body M1 stirs and crushes the sludge and mixes the sewage to prevent the sludge from settling, which is conducive to the sewage pump to extract the sewage mixed with the sludge, etc., reducing the process of separate sludge treatment. Turn on the main power switch, after the AC 220V power enters the power input end of the power module W1, the 3rd and 4th pins of the power module W1 output a stable DC 12V power supply to enter the power input end of the comparison circuit and the control prompt circuit. At the same time, the AC 220V power enters the power input end of the submersible mixer body M1 through the relay K1 control power input end and the normally closed contact end. The submersible mixer body M1 is powered on to stir and crush the sludge. In actual situations, after the submersible mixer body M1 is powered on, the current flowing through its phase line will act on the current transformer M. The greater the load of the submersible mixer body M1, the greater the current flowing through the current transformer M, and vice versa. The secondary side of the current transformer M outputs current signals of different sizes to the power input terminals 1 and 2 of the rectifier bridge stack W2 (the greater the load of the submersible mixer body M1, the higher the current voltage signal input to the power input terminal of the rectifier bridge stack W2, and vice versa), and the rectifier bridge stack W2 outputs DC power at the 3rd and 4th pins. When the load of the submersible mixer body M1 is large (that is, there is relatively more sludge at the bottom of the sewage pool in the operation area), the DC power supply is filtered by capacitor C1, divided by adjustable resistor RP1 and resistor R2, and the voltage drop limit of resistor R3 enters the base of transistor Q1 above 0.7V. The transistor Q1 conducts and the collector outputs a low level to the negative power input terminal of relay K. Relay K is energized to close its control power input terminal and the normally closed contact terminal to open the circuit, then the thyristor VS will not be triggered to conduct, and the 220V AC power supply continues to supply power to the submersible mixer body M1 through the control power input terminal and the normally closed contact terminal of relay K1, and the submersible mixer body M1 continues to work to mix and crush the sludge.When the load of the submersible mixer body M1 is small (that is, the sludge at the bottom of the sewage pool in the operation area is relatively small, and the load of the stirring plate at the lower end of the submersible mixer body M1 becomes smaller), the DC power supply is filtered by capacitor C1, and the adjustable resistor RP1 and resistor R2 divide the voltage. The resistor R3 reduces the voltage and limits the voltage entering the base of the transistor Q1 to less than 0.7V. The transistor Q1 is cut off and the collector no longer outputs a low level to enter the negative power input terminal of the relay K. The relay K loses power and no longer attracts its control power input terminal and the normally closed contact terminal to close. The 12V power supply is reduced by resistor R4 and limited to charge the capacitor C. After charging for a period of time (for example, 3 seconds, the time is equal to 1.1×the resistance value of resistor R4×the capacity of capacitor C) , the control electrode voltage entering the thyristor VS is higher than 0.7V, and the thyristor VS is triggered to turn on (if the time is less than 3 seconds, the thyristor VS will not be triggered to turn on. The 3-second delay is mainly to prevent the submersible mixer body M1 from starting up and the relay K has not yet been energized and attracted. The 12V power supply controls the power input terminal and the normally closed contact terminal of the relay K to trigger the thyristor VS to turn on. The 3-second delay can ensure that the submersible mixer body M1 is just turned on and the relay is not energized and attracted. The thyristor will not be triggered to turn on), and then, the relay K1 is energized and attracted, and its control power input terminal and the normally closed contact terminal are open. Then, the submersible mixer body M1 will lose power and no longer work.

[0018] Figure 1 , 2As shown, when the submersible mixer body M1 loses power and the thyristor VS is turned on, the power output at the cathode of the thyristor VS is reduced in voltage and limited in current through the adjustable resistor RP2 to charge the capacitor C2. In the initial time period (for example, less than five minutes, the specific time can be adjusted by the technical personnel of the production or terminal user, and the time is equal to 1.1×the resistance value of the adjustable resistor RP2×the capacity of the capacitor C2), when the capacitor C2 is not fully charged, the power enters the base of the transistor Q3 below 0.7V through the adjustable resistor RP2 and the resistor R5, and the transistor Q3 will not be turned on. Then the thyristor VS continues to remain turned on, and the submersible mixer body M1 cannot work electrically. After charging for a period of time (for example, more than five minutes), when the capacitor C2 is fully charged, the power supply enters the base of the transistor Q3 above 0.7V through the adjustable resistor RP2 and the resistor R5 to reduce the voltage and limit the current. The transistor Q3 will turn on the collector to output a low level and enter the negative power input terminal of the relay K2. The relay K2 is energized to attract its control power input terminal and the normally closed contact terminal to open the circuit, and then the anode of the thyristor VS1 will lose power and no longer remain in the on state. The relay K1 loses power again to control the power input terminal and the normally closed contact terminal to close, and the submersible mixer body M1 is energized to work again (at the same time as the relay K2 is energized, the buzzer BX is energized and sounds for a period of time to remind nearby staff that the submersible mixer body M1 has basically completed the mixing and crushing of the corresponding sludge last time; because the charge of the capacitor C2 will take some time to release, the relay K2 will continue to be energized and attracted for 5 seconds, and the buzzer BX will also be energized and sound for about 5 seconds). After the submersible mixer body M1 is powered on again, if the sludge in other areas of the sewage pool flows to the corresponding operating area again, it will be crushed and mixed again. On the contrary, if there is no sludge flowing into the operating area or very little sludge flows into the operating area, the submersible mixer body M1 will lose power and stop working, and will be powered on again through the buzzer BX to sound a warning to the staff.

[0019] Figure 1 , 2 As shown above, the new type can monitor the motor load condition of the submersible mixer body M1 (4KW) in real time when working. When the sludge treatment in the working area is almost completed, that is, when the working current is small (indicating that the sludge is almost completely cleared), it can be powered on for a certain period of time (the sludge in other areas of the sewage tank flows to the working area again), and sound prompts the staff (the staff can turn off the main power switch after the sludge in the working area is cleared as needed), which achieves the purpose of saving electricity and brings convenience to the staff. Figure 2The resistance values ​​of resistors R2, R3, R4, and R5 are 8K, 4.7K, 2.7M, and 470K, respectively; the model of thyristor VS is MCR100-1; the power module W1 is an AC 220V to DC 12V power module; the capacitors C1, C, and C2 are electrolytic capacitors of 470μF / 25V, 1μF / 25V, and 100μF / 25V, respectively; the resistance values ​​of adjustable resistors RP1 and RP2 are 470K, respectively (adjusted to 71K in this embodiment. Specifically, the larger the resistance value of the adjustable resistor RP1 is adjusted, the greater the voltage division between it and the resistor R2. In this way, when the motor load of the submersible mixer body M1 is relatively larger, the transistor Q1 will be turned on, that is, the motor load monitoring threshold of the submersible mixer body M1 is set relatively large; the adjustable resistor R The smaller the resistance value of P1 is adjusted, the smaller the voltage divided between it and the resistor R2. In this way, when the motor load of the submersible mixer body M1 is relatively smaller, the transistor Q1 will be turned on, that is, the motor load monitoring threshold of the submersible mixer body M1 is set relatively small, and the specific threshold is set by the production or terminal technicians according to actual production needs), 4.7M (adjusted to 2.7M in this embodiment); relays K, K1, and K2 are DC12V relays; the sounder BX is an active continuous sound alarm of model XQ12V; transistors Q1 and Q3 are NPN transistors of model 9013; current transformer M is a finished AC current transformer of model GL-CT226A (the larger the induced current, the higher the voltage signal output on the secondary side, and vice versa).

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0021] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An energy-saving submersible mixer for sewage treatment, comprising a submersible mixer body and a current transformer, characterized in that: It also has a rectifier circuit, a comparison circuit, and a control prompt circuit; the current transformer, the rectifier circuit, the comparison circuit, and the control prompt circuit are installed in a component box; the phase line of the control power input end of the comparison circuit passes through the central hole of the current transformer, the signal output end of the current transformer is electrically connected to the signal input end of the rectifier circuit, and the signal output end of the rectifier circuit is electrically connected to the signal input end of the comparison circuit; the signal output end of the comparison circuit is electrically connected to the signal input end of the control prompt circuit, and the signal output end of the control prompt circuit is electrically connected to the trigger end of the comparison circuit; the control power output end of the comparison circuit is electrically connected to the power input end of the submersible mixer body.

2. An energy-saving submersible mixer for sewage treatment according to claim 1, characterized in that: The rectifier circuit includes an electrically connected rectifier bridge stack, a capacitor, an adjustable resistor, and a resistor. The positive power supply output end of the rectifier bridge stack is connected to the positive electrode of the capacitor and one end of the adjustable resistor. The negative power supply output end of the rectifier bridge stack is connected to the negative electrode of the capacitor and one end of the first resistor. The other end of the adjustable resistor is connected to the other end of the first resistor and one end of the second resistor.

3. The energy-saving submersible mixer for sewage treatment according to claim 1, characterized in that: The comparison circuit includes an electrically connected transistor and resistor, a thyristor, a relay, and a capacitor. The collector of the transistor is connected to the negative power input terminal of the first relay, the positive power input terminal of the first relay is connected to the control power input terminal, the normally closed contact terminal of the first relay is connected to one end of the resistor, the other end of the resistor is connected to the positive electrode of the capacitor and the control electrode of the thyristor, the cathode of the thyristor is connected to the positive power input terminal of the second relay, and the negative electrode of the capacitor is connected to the negative power input terminal of the second relay and the emitter of the transistor.

4. The energy-saving submersible mixer for sewage treatment according to claim 1, characterized in that: The control prompt circuit includes an electrically connected relay and an adjustable resistor, a resistor, a transistor, an alarm, and a capacitor. One end of the adjustable resistor is connected to the positive electrode of the capacitor and one end of the resistor, the other end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input end of the relay and the alarm, the negative electrode of the capacitor is connected to the emitter of the transistor, and the positive power input end of the relay and the control power input end are connected to the positive power input end of the alarm.

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