Control system of sewage treatment device

Abstract

The sewage treatment device control system disclosed by the utility model is high-efficiency, safe and stable in sewage treatment. The system comprises a water pump, a water inlet pipe, a water outlet pipe, a control cabinet and an electromagnetic induction module. Wherein the electromagnetic induction module surrounds a cable for connecting a silicon controlled rectifier cathode and a water pump motor through an induction coil L to capture a magnetic field generated by current change of the motor, the magnetic field is amplified through a signal amplifier AMP, and gain is set through a feedback resistor Rf and a balance resistor Rb. The module can monitor motor current in real time, and when the current is abnormal, the control cabinet controls the silicon controlled rectifier to cut off the circuit. In addition, real-time monitoring of the liquid level of the sewage pool and the temperature of the water pump is achieved through a sewage concentration pool liquid level height sensor, a plant sewage pool liquid level height sensor and a temperature sensor. The system controls start and stop of the water pump through keys, a fault indicating lamp feeds back abnormity of the water pump, the magnetic anti-freezing device prevents low-temperature freezing of the water pump, and stable operation of the sewage treatment system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially, relate to a sewage treatment device's control system. BACKGROUND

[0002] In the field of sewage treatment, the delivery of sewage is a key link, and currently, water pumps are generally used to pump sewage to sewage stations for subsequent treatment.

[0003] Traditional sewage treatment device control systems are often simple, and in terms of water pump control, simple mechanical switches are often used to directly control the on-off of water pump motors, lacking automatic control capabilities. In addition, in the past, only manual regular inspection was relied on for equipment operation state monitoring, which had long intervals, was highly subjective, lacked real-time and accurate temperature and sewage pool liquid level monitoring means, and could not timely detect water pump overheating and sewage pool liquid level abnormalities. Once a fault occurs, it is difficult to respond in time, resulting in prolonged maintenance cycles, significantly increased downtime of the entire sewage treatment system, and serious impact on factory production progress and economic benefits. UTILITY MODEL CONTENTS

[0004] The utility model discloses a sewage treatment device control system to solve the problems of lack of automatic control capabilities and inability to timely detect water pump overheating and sewage pool liquid level abnormalities in the prior art.

[0005] The utility model adopts the technical scheme of:

[0006] A sewage treatment device control system, wherein the sewage treatment device comprises at least:

[0007] A plurality of water pumps;

[0008] A plurality of water inlet pipes, each of which is connected to the water inlet of each water pump;

[0009] A plurality of water outlet pipes, each of which is connected to the water outlet of each water pump;

[0010] Characterized in that the control system comprises a control cabinet, a plurality of thyristors, and a plurality of electromagnetic induction modules;

[0011] Wherein the anode of each thyristor is connected to a power supply, the cathode of each thyristor is connected to the motor of all water pumps, and the gate of each thyristor is connected to the control cabinet; the control cabinet controls the current of the gate of all thyristors, thereby controlling the opening and closing of all thyristors, and further controlling the opening and closing of all water pumps;

[0012] Each of the electromagnetic induction modules is installed around the cable connected with the motor of the water pump and the cathode of the thyristor, for detecting the change of the motor current; each of the electromagnetic induction modules is also connected with the control cabinet, for transmitting the motor current signal to the control cabinet, and when the control cabinet detects the abnormal motor current, the thyristor is controlled to be disconnected.

[0013] Further, the control cabinet is installed with a plurality of keys.

[0014] When each of the keys is pressed, the control cabinet generates current in the cable connected with the gate of each of the thyristors, so that the thyristor is closed and the circuit is conducted.

[0015] When each of the keys is lifted, there is no current in the cable connected with the gate of each of the thyristors, so that the thyristor is disconnected and the circuit is disconnected.

[0016] Further, the control cabinet is installed with a plurality of fault indicator lamps.

[0017] Each of the fault indicator lamps corresponds to one of the water pumps, and when the temperature of the water pump is higher than the normal value, the corresponding fault indicator lamp is lighted.

[0018] Further, the control cabinet is a PLC control cabinet.

[0019] Further, it further comprises:

[0020] A sewage centralized pool liquid level sensor and a plurality of plant sewage pool liquid level sensors.

[0021] The sewage centralized pool liquid level sensor is installed at the upper part of the sewage centralized pool, for detecting the real-time liquid level of the sewage centralized pool; the sewage centralized pool liquid level sensor is connected with the control cabinet, for feeding back the real-time liquid level information of the sewage centralized pool to the control cabinet.

[0022] Each of the plant sewage pool liquid level sensors detects the real-time liquid level of each of the plant sewage pools; the plant sewage pool liquid level sensors are connected with the control cabinet, for feeding back the real-time liquid level information of the plant sewage pools to the control cabinet.

[0023] Further, it further comprises:

[0024] A plurality of temperature sensors and a display screen.

[0025] Each of the temperature sensors is installed on the corresponding water pump, for measuring the temperature of the water pump, and each of the temperature sensors is connected with the control cabinet, for feeding back the real-time temperature of the water pump to the control cabinet.

[0026] The display screen is connected with the control cabinet, and is used for displaying real-time temperature of each water pump, real-time liquid level height information of the sewage concentration pool and real-time liquid level height information of each plant sewage pool.

[0027] Further, the magnetic attraction anti-freezing device is further included.

[0028] Each magnetic attraction anti-freezing device is respectively attracted on the corresponding water pump by a magnet, so as to prevent the water pump from not working normally due to overcooling weather.

[0029] The cable for connecting the power supply with the anode of the thyristor is a polyvinyl chloride insulated wire.

[0030] The cable for connecting the cathode of the thyristor with the water pump motor is a YC heavy rubber sheathed cable.

[0031] The cable for connecting the control cabinet with the gate of the thyristor is an RVVP type shielded flexible wire.

[0032] Further, the electromagnetic induction module comprises:

[0033] An induction coil L is arranged around the cable for connecting the cathode of the thyristor with the water pump motor, and is used for capturing the magnetic field generated by the change of the motor current.

[0034] A signal amplifier AMP is connected with the induction coil L of the electromagnetic induction module through a wire. The induction current signal output by the induction coil L is transmitted to the signal amplifier AMP, the signal amplifier AMP performs amplification processing on the signal, and the amplified signal is transmitted to the control cabinet through a wire. The non-inverting input end of the signal amplifier AMP is connected with the positive pole of the induction coil L, and the inverting input end of the signal amplifier AMP is connected with the negative pole of the induction coil L. The input resistance of the signal amplifier AMP is the resistance of the induction coil L.

[0035] A feedback resistor Rf is connected between the output end and the inverting input end of the operational amplifier.

[0036] Further, a balance resistor Rb is connected between the inverting input end of the signal amplifier AMP and the ground.

[0037] Further, a current limiting resistor CLR is connected in series between the induction coil L and the non-inverting input end of the signal amplifier AMP.

[0038] The utility model discloses the beneficial effect is:

[0039] The utility model discloses a sewage treatment device's control system in the system operation aspect, realized the automation control, and the sewage treatment efficiency is greatly promoted. Through the cooperation of control cabinet and each part, the start -stop of water pump can be controlled accurately, and the demand of different working conditions is satisfied. The application of electromagnetic induction module has brought the remarkable security guarantee. It monitors motor current in real time, and once the abnormality appears, can notify control cabinet to cut off the circuit quickly, avoids the damage of motor because of overload, short -circuit and other faults, prolongs the service life of motor. The use of various sensors makes the system can acquire sewage pool liquid level, water pump temperature and other information in real time. According to this information, control cabinet can adjust water pump operating state in time, prevents sewage pool overflow or evacuation, and guarantees the stable operation of whole system. In addition, the system also improves the maintainability of equipment, and shows key information through display screen, facilitates staff to troubleshoot and maintains. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0041] Figure 1 It is a schematic view of sewage treatment device.

[0042] Figure 2 It is a circuit diagram of electromagnetic induction module. DETAILED DESCRIPTION

[0043] The utility model discloses a sewage treatment device to solve the problem that water pump in prior art is directly placed in sewage for a long time and is easy to oxidize and corrode.

[0044] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation of the utility model.

[0045] The embodiments provided in the following disclosure are used to implement the structure of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model.

[0046] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0047] The sewage treatment device disclosed in the embodiment comprises a water pump, an inlet pipe, an outlet pipe, a control cabinet, an electromagnetic induction module, a sewage concentration tank liquid level sensor, a plant sewage tank liquid level sensor, a temperature sensor, a magnetic suction anti-freezer, a display screen, a key, and a fault indicator.

[0048] The inlet of the water pump is connected with the inlet pipe, and the outlet is connected with the outlet pipe. The motor of the water pump is connected with the cathode of the silicon controlled rectifier. A temperature sensor is installed on the water pump, and a magnetic suction anti-freezer is adsorbed. The anode of the silicon controlled rectifier is connected with the power supply, and the gate is connected with the control cabinet. The electromagnetic induction module is installed around the cable connected with the cathode of the silicon controlled rectifier and the motor of the water pump, and is connected with the control cabinet. The sewage concentration tank liquid level sensor is installed on the upper part of the sewage concentration tank and is connected with the control cabinet. The plant sewage tank liquid level sensor is associated with the corresponding plant sewage tank and is connected with the control cabinet. The control cabinet has a key and is installed with a fault indicator, and is also connected with a display screen. The display screen is used to display the temperature of the water pump, the liquid level of the sewage concentration tank, and the liquid level of the plant sewage tank.

[0049] The above components are specifically and in detail described below:

[0050] Water pump, inlet pipe, outlet pipe: the sewage treatment device control system comprises three water pumps, each of which has a corresponding inlet pipe and outlet pipe. The inlet pipe is connected with the inlet of the water pump, and the outlet pipe is connected with the outlet of the water pump, which is used for conveying sewage.

[0051] Control cabinet: a PLC control cabinet is used as the core of the control system. The control cabinet is connected with the gate of each water pump through a cable, which is used to control the on-off of the silicon controlled rectifier, and further control the opening and closing of the water pump.

[0052] Silicon controlled rectifier: there are three silicon controlled rectifiers. The anode of each silicon controlled rectifier is connected with the power supply, the cathode is connected with the motor of all water pumps, and the gate is connected with the control cabinet. The gate current of the silicon controlled rectifier is controlled by the control cabinet to realize the control of the water pump.

[0053] Electromagnetic induction module: the circuit diagram of the electromagnetic induction module is as shown in the accompanying Figure 2As shown. Each electromagnetic induction module consists of an induction coil L, a signal amplifier AMP, a feedback resistor Rf, a balance resistor Rb and a current limiting resistor CLR. The induction coil L is wrapped around the cable connected to the thyristor cathode and the water pump motor, used to capture the magnetic field generated by the motor current change. The signal amplifier AMP is used to amplify the induction current signal output by the induction coil L. The same input end of the signal amplifier AMP is connected to the positive pole of the induction coil L, and the opposite input end is connected to the negative pole of the induction coil L, and its input resistance is the resistance of the induction coil L. The feedback resistor Rf is connected between the output and the inverting input of the operational amplifier (signal amplifier AMP), used to set the gain of the amplifier. The balance resistor Rb is connected between the inverting input of the signal amplifier AMP and the ground, used to reduce the error caused by the input bias current of the operational amplifier. The current limiting resistor CLR is connected in series between the induction coil L and the non-inverting input of the signal amplifier AMP, used to limit the input current and protect the amplifier.

[0054] Sewage concentration tank liquid level sensor: The sewage concentration tank liquid level sensor is installed on the upper part of the sewage concentration tank, used to detect the real-time liquid level of the sewage concentration tank and feed back the information to the control cabinet.

[0055] Plant sewage tank liquid level sensor: There are 3 plant sewage tank liquid level sensors, respectively detecting the real-time liquid level of the 3 plant sewage tanks and feeding back the information to the control cabinet.

[0056] Temperature sensor: 3 temperature sensors are installed on the 3 water pumps respectively, used to measure the water pump temperature and feed back the real-time temperature to the control cabinet.

[0057] There are 3 keys in the control cabinet. When the keys are pressed, the control cabinet generates current with the cable connected to the thyristor gate, the thyristor is closed, and the circuit is turned on. When the keys are lifted, there is no current in the cable, the thyristor is opened, and the circuit is turned off.

[0058] The control cabinet is installed with 3 fault indicator lights, each corresponding to a water pump. When the water pump temperature is higher than the normal value, the corresponding fault indicator light is on.

[0059] 3 magnetic attraction anti-freezing devices are respectively attached to the 3 water pumps by magnets to prevent the water pumps from not working normally due to overcooling weather.

[0060] The cable connected to the anode of the power supply and the thyristor is a polyvinyl chloride insulated wire; the cable connected to the cathode of the thyristor and the water pump motor is a YC heavy rubber sheathed cable; the cable connected to the control cabinet and the gate of the thyristor is an RVVP type shielded flexible wire.

[0061] The display screen is connected to the control cabinet, used to display the real-time temperature of each water pump, the real-time liquid level of the sewage concentration tank and the real-time liquid level of each plant sewage tank.

[0062] The working process of the sewage treatment device disclosed in the embodiment is described as follows:

[0063] Water pump control:

[0064] When the water pump needs to be started, the operator presses the corresponding button in the control cabinet, the control cabinet outputs current to the silicon gate, the silicon is closed, and the corresponding water pump motor is started to start the water pumping operation. When the water pump needs to be stopped, lift the button, the silicon is disconnected, and the water pump stops working.

[0065] Fault detection and indication:

[0066] The temperature sensor monitors the water pump temperature in real time and feeds back the data to the control cabinet. When the water pump temperature is higher than the normal value, the control cabinet makes the corresponding fault indication light turn on, reminding the operator that the water pump may have a fault and needs to be checked.

[0067] Liquid level monitoring:

[0068] The liquid level height sensor of the sewage collection tank and the liquid level height sensor of the plant sewage tank continuously detect the liquid level height and transmit the data to the control cabinet. The control cabinet can automatically control the start and stop of the water pump according to the liquid level height information, for example, when the liquid level height of the sewage collection tank reaches a certain height, the water pump is started to pump water; when the liquid level height of the plant sewage tank is low to a certain extent, the water pump is stopped to pump water.

[0069] Electromagnetic induction module works:

[0070] The induction coil L captures the magnetic field generated by the change of the motor current during the operation of the water pump motor and generates an induced current signal. The signal passes through the current limiting resistor CLR and enters the signal amplifier AMP. In the signal amplifier AMP, the signal is amplified according to the setting of the feedback resistor Rf and the balance resistor Rb, and the amplified signal is transmitted to the control cabinet. The control cabinet analyzes the received signal, and when an abnormal motor current is detected, the silicon is disconnected to protect the water pump motor.

[0071] Anti-freezing measures:

[0072] In cold weather, the magnetic attraction anti-freezing device is attracted to the water pump to prevent the water pump from freezing due to low temperature and ensure the stable operation of the sewage treatment system.

[0073] The sewage treatment device disclosed in the embodiment has the following advantages:

[0074] Overall operation: efficient automatic control, improve equipment service life

[0075] High-efficiency automatic control is reflected in the connection and coordination of the control cabinet with various components, achieving automatic control of key parameters such as water pumps and liquid levels during the sewage treatment process. This automated operation reduces the need for manual intervention, improves the efficiency of sewage treatment, and ensures stable and continuous operation of the system.

[0076] Improving equipment service life is reflected in the various protection mechanisms in the system, such as the electromagnetic induction module monitoring and protecting the water pump motor current, the temperature sensor monitoring the water pump temperature, and the magnetic suction anti-freezing device protecting the water pump from freezing. These mechanisms effectively prevent equipment damage due to overload, overheating, freezing, and other abnormal conditions, thereby extending the service life of key equipment such as water pumps and silicon-controlled rectifiers, reducing equipment replacement and maintenance costs.

[0077] Water pump control: precise start-stop control and rapid fault response

[0078] Precise start-stop control is achieved by connecting the control cabinet with silicon-controlled rectifiers and buttons, allowing operators to precisely control the start and stop of water pumps through simple button operations. This precise control helps to flexibly adjust the working state of water pumps according to actual sewage treatment needs, avoiding unnecessary energy consumption and achieving energy-saving operation.

[0079] Rapid fault response is reflected in the connection of temperature sensors with fault indicator lights and control cabinets, which can monitor water pump temperature in real time and timely feedback abnormal conditions. Once the water pump temperature is too high, the fault indicator light will immediately light up, allowing workers to quickly respond and check and repair the water pump, reducing downtime of the sewage treatment system caused by water pump failure and ensuring normal operation of the sewage treatment work.

[0080] Liquid level monitoring: connection of sewage collection tank liquid level height sensor and plant sewage tank liquid level height sensor with control cabinet allows the control cabinet to automatically control the start and stop of water pumps according to liquid level height. This ensures that the liquid level of the sewage tank always remains within a reasonable range, preventing environmental pollution caused by sewage tank overflow and avoiding damage to water pumps caused by emptying the sewage tank, optimizing the entire sewage treatment process and improving the reliability and safety of sewage treatment.

[0081] Reliable motor protection: the inductive coil, signal amplifier, and other components in the electromagnetic induction module can accurately capture changes in water pump motor current and process and amplify the inductive signal through reasonable circuit design (including feedback resistance, balance resistance, and current limiting resistance, etc.), transmitting reliable current signals to the control cabinet. The control cabinet can timely detect motor current abnormalities and take measures, providing reliable protection for water pump motors.

[0082] Convenient operation and maintenance: the display screen is connected with the control cabinet, which can intuitively display the key information such as water pump temperature and sewage pool liquid level, so that the staff can know the running state of the sewage treatment system in real time without checking each one on site, reducing the operation difficulty. At the same time, the reasonable connection and clear division of labor of each part in the system also make the fault diagnosis and equipment maintenance more convenient and fast, further improving the maintainability of the whole system.

[0083] Adapt to harsh environment: the magnetic suction anti-freezing device can effectively protect the water pump in cold weather, and in the selection of cable, suitable cables (polyvinyl chloride insulated wire, YC heavy rubber sheathed cable, RVVP type shielded flexible wire) are selected for different connection parts, ensuring the reliability of the cable under different environmental conditions, so that the whole sewage treatment device control system can adapt to the more harsh working environment and ensure the long-term stable operation of the system.

Claims

1. A control system for a sewage treatment plant, wherein, The sewage treatment device at least comprises: a plurality of water pumps; a plurality of water inlet pipes, each of which is connected with the water inlet of each water pump; a plurality of water outlet pipes, each of which is connected with the water outlet of each water pump; characterized in that the control system comprises a control cabinet, a plurality of thyristors and a plurality of electromagnetic induction modules; wherein the anode of each thyristor is connected with a power supply, the cathode of each thyristor is connected with the motor of all water pumps, and the gate of each thyristor is connected with the control cabinet; the control cabinet controls the current of the gate of all thyristors, thereby controlling the opening and closing of all thyristors, and further controlling the opening and closing of all water pumps; each electromagnetic induction module is installed around the cable connecting the cathode of the thyristor with the motor of the water pump, for detecting the change of the motor current; each electromagnetic induction module is also connected with the control cabinet, for transmitting the motor current signal to the control cabinet, and when the control cabinet detects an abnormal motor current, the thyristor is controlled to be disconnected.

2. The control system of a sewage treatment plant according to claim 1, characterized in that The control cabinet is installed with a plurality of buttons; when each button is pressed, the cable connecting the control cabinet with the gate of each thyristor generates a current, so that the thyristor is closed and the circuit is turned on; when each button is lifted, there is no current in the cable connecting the control cabinet with the gate of each thyristor, so that the thyristor is disconnected and the circuit is turned off.

3. The control system of a sewage treatment plant according to claim 1, characterized in that, The control cabinet is installed with a plurality of fault indicator lights; each fault indicator light corresponds to one water pump, and when the temperature of the water pump is higher than the normal value, the corresponding fault indicator light is turned on.

4. The control system of a sewage treatment plant according to claim 1, characterized in that, The control cabinet is a PLC control cabinet.

5. The control system of the sewage treatment device according to claim 1, characterized by Further comprising: a sewage concentration tank liquid level sensor and a plurality of plant sewage tank liquid level sensors; the sewage concentration tank liquid level sensor is installed at the upper part of the sewage concentration tank, for detecting the real-time liquid level of the sewage concentration tank; the sewage concentration tank liquid level sensor is connected with the control cabinet, for feeding back the real-time liquid level information of the sewage concentration tank to the control cabinet; each plant sewage tank liquid level sensor detects the real-time liquid level of each plant sewage tank; the plant sewage tank liquid level sensor is connected with the control cabinet, for feeding back the real-time liquid level information of the plant sewage tank to the control cabinet.

6. The control system of a sewage treatment plant according to claim 1, characterized in that, Further comprising: a plurality of temperature sensors and a display screen; each temperature sensor is installed on the corresponding water pump, for measuring the temperature of the water pump, and each temperature sensor is connected with the control cabinet, for feeding back the real-time temperature of the water pump to the control cabinet; the display screen is connected with the control cabinet, and the display screen is used for displaying the real-time temperature of each water pump, the real-time liquid level information of the sewage concentration tank, and the real-time liquid level information of each plant sewage tank.

7. The control system of a sewage treatment plant according to any one of claims 1-6, characterized in that, Further comprising: a plurality of magnetic anti-freezing devices each magnetic anti-freezing device is attracted to the corresponding water pump by a magnet, for preventing the water pump from not working normally due to overcooling weather; the cable connecting the power supply with the anode of the thyristor is a polyvinyl chloride insulated wire; The cathode of the thyristor is connected with the cable for the water pump motor, which is YC heavy rubber cable; The control cabinet is connected with the cable for the gate of the thyristor, which is RVVP shielded flexible cord.

8. The control system of a sewage treatment plant according to any one of claims 1-6, characterized in that, The electromagnetic induction module comprises: An induction coil L, which is wrapped around the cable for the water pump motor connected with the cathode of the thyristor, for capturing the magnetic field generated by the motor current change; A signal amplifier AMP, the induction coil L of the electromagnetic induction module is connected with the signal amplifier AMP through wires; the induction current signal output by the induction coil L is transmitted to the signal amplifier AMP, the signal amplifier AMP amplifies the signal, and the amplified signal is transmitted to the control cabinet through wires; the noninverting input end of the signal amplifier AMP is connected with the positive pole of the induction coil L, and the inverting input end of the signal amplifier AMP is connected with the negative pole of the induction coil L; the input resistance of the signal amplifier AMP is the resistance of the induction coil L; A feedback resistor Rf, which is connected between the output end and the inverting input end of the operational amplifier.

9. A control system for a sewage treatment plant as claimed in claim 8, characterised in that, A balance resistor Rb is connected between the inverting input end of the signal amplifier AMP and the ground.

10. A control system for a sewage treatment plant according to any one of claim 9, characterised in that, A current-limiting resistor CLR is connected in series between the induction coil L and the noninverting input end of the signal amplifier AMP.

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