A sludge hopper control system

Abstract

The utility model discloses a kind of sludge hopper control systems, comprising: control panel, main circuit, operating panel and control cabinet;The main circuit is connected with the control panel, and the main circuit includes parallelly connected power indicator light circuit, sludge hopper high-pressure cleaning pump circuit, camera cleaning pump circuit, sludge hopper solenoid valve circuit, monitoring power circuit;Touch screen, motor and solenoid valve open button ST, motor and solenoid valve off button SP, motor and solenoid valve manual remote control rotary switch SA are equipped on the operating panel;The control cabinet is connected with the control panel, the operating panel respectively. Operating personnel not only can remote monitor sludge hopper use condition, but also can operate corresponding equipment control button on control panel, realize efficient, visual, safe, automated cleaning operation.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a sludge hopper control system. Background Technology

[0002] In wastewater treatment plants, industrial wastewater treatment stations, and solid waste treatment facilities, sludge hoppers are widely used as key equipment for sludge collection, temporary storage, and unloading. During long-term operation, sticky substances, fibrous impurities, and inorganic particles in the sludge easily adhere to and deposit on the inner wall of the sludge hopper, leading to problems such as poor unloading, reduced effective volume, and odor emission. Therefore, it is necessary to clean the inside of the sludge hopper regularly.

[0003] Currently, sludge hopper cleaning mainly relies on manual labor, where operators enter the sludge hopper and use handheld high-pressure water guns or cleaning tools to flush and clean it. However, manual cleaning is labor-intensive, involves harsh working conditions, and carries safety risks such as poisoning, suffocation, and falls from heights. Utility Model Content

[0004] Therefore, a sludge hopper control system is needed to solve the problem that the cleaning of sludge hoppers currently relies mainly on manual cleaning.

[0005] To achieve the above objectives, the inventors provide a sludge hopper control system, comprising: a control panel, a main circuit, an operation panel, and a control cabinet;

[0006] The main circuit is connected to the control panel. The main circuit includes a power indicator circuit, a sludge hopper high-pressure cleaning pump circuit, a camera cleaning pump circuit, a sludge hopper solenoid valve circuit, a monitoring power supply circuit, and an automatic control power supply circuit connected in parallel.

[0007] The sludge hopper high-pressure cleaning pump circuit includes a motor M1, a thermal relay protection switch FR01, a contactor switch KM01, and a circuit breaker QF01. The power supply of the motor M1 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M1 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR01, the contactor switch KM01, and the circuit breaker QF01.

[0008] The camera cleaning pump circuit includes a motor M2, a thermal relay protection switch FR02, a contactor switch KM02, and a circuit breaker QF02. The power supply of the motor M2 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M2 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR02, the contactor switch KM02, and the circuit breaker QF02.

[0009] The sludge hopper solenoid valve circuit includes a solenoid valve M3, a relay switch KA03, and a circuit breaker QF03. The power supply of the solenoid valve M3 is connected to the C-phase power line of the power input terminal, and the power supply of the solenoid valve M3 and the corresponding C-phase power line of the power input terminal are connected in sequence to the relay switch KA03 and the circuit breaker QF03.

[0010] The power supply circuit of the monitoring power supply circuit is connected to the circuit breaker QF05 in sequence between the power supply and the A-phase power line and the N-phase power line of the power input terminal. The monitoring power supply circuit supplies power to the camera.

[0011] The operation panel is equipped with a touch screen, a motor and solenoid valve open button ST, a motor and solenoid valve close button SP, and a manual / remote control rotary switch SA for the motor and solenoid valve. The manual / remote control rotary switch SA is used to switch between local and remote gears. The motor and solenoid valve open button ST and the motor and solenoid valve close button SP are used to control the coils of the contactor switches KM01 and KM02 and the relay switch KA03 respectively in local mode.

[0012] The control cabinet is connected to the control panel and the operation panel respectively, and the automatic power supply circuit supplies power to the control cabinet.

[0013] Furthermore, the main circuit also includes a parallel current measuring circuit, which is used to measure the current in the main circuit.

[0014] Furthermore: the current measurement circuit includes three ammeters and three current transformers. The three current transformers are connected to the A, B, and C phase power lines of the power input terminal. One ammeter is connected to one current transformer. The ammeters are mounted on the operation panel.

[0015] Furthermore: the operation panel is equipped with a motor and solenoid valve open indicator HG, a motor and solenoid valve closed indicator HR, and a motor fault indicator HY;

[0016] The indicator lights HG for the motor and solenoid valve open and HR for the motor and solenoid valve closed are connected in series to the corresponding auxiliary normally open and auxiliary normally closed contacts of contactor switches KM01 and KM02 and relay switch KA03, respectively.

[0017] The motor fault indicator light HY is connected to thermal relays FR01 and FR02 and is used to illuminate when motors M1 and M2 malfunction.

[0018] Furthermore: the power supply of the self-controlled power supply circuit is connected in sequence to the A-phase power line and the N-phase power line at the power input terminal by a circuit breaker QF04.

[0019] Furthermore, it also includes the control circuit of instrumentation and control equipment connected to the control panel and control cabinet.

[0020] Furthermore, the control loop of the instrumentation equipment also includes a sludge hopper material meter FIT101 and a sludge hopper weighing sensor PIT201. The sludge hopper material meter FIT101 and the sludge hopper weighing sensor PIT201 are connected to the control panel and control cabinet, and the touch screen displays the sludge status of the sludge hopper.

[0021] Furthermore, the control cabinet is controlled by a PLC, specifically an S7-200SMART PLC.

[0022] Unlike existing technologies, the above technical solution has the following beneficial effects:

[0023] By integrating the high-pressure cleaning pump circuit of the sludge hopper and the cleaning pump circuit of the camera, and with the monitoring of the control cabinet (PLC), operators can monitor the internal status of the sludge hopper in real time without entering it. Compared with traditional manual cleaning, operators can not only remotely monitor the use of the sludge hopper, but also operate the corresponding equipment control buttons on the control panel to achieve efficient, visual, safe and automated cleaning operations, reducing workload.

[0024] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0025] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0026] Figure 1 This is the circuit diagram of the main circuit in this embodiment;

[0027] Figure 2 This is a schematic diagram of the control panel in this embodiment;

[0028] Figure 3 This is a circuit diagram of the current measurement loop in this embodiment;

[0029] Figure 4 This is the circuit diagram related to the solenoid valve in this embodiment;

[0030] Figure 5 This is a circuit diagram of the sludge hopper material meter FIT101 and the PLC in this embodiment;

[0031] Figure 6 This is the circuit diagram related to the electric motor in this embodiment;

[0032] Figure 7 This is one of the PLC-related circuit diagrams in this embodiment;

[0033] Figure 8 This is the second circuit diagram related to the PLC in this embodiment;

[0034] Figure 9 This is a schematic diagram of the relevant signals in this embodiment. Detailed Implementation

[0035] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0036] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0039] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0040] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0041] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0042] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Please see Figures 1 to 9 This embodiment provides a sludge hopper control system, including: a control panel, a main circuit, an operation panel, and a control cabinet;

[0045] The main circuit is connected to the control panel. The main circuit includes a power indicator circuit, a sludge hopper high-pressure cleaning pump circuit, a camera cleaning pump circuit, a sludge hopper solenoid valve circuit, a monitoring power supply circuit, and an automatic control power supply circuit connected in parallel.

[0046] The sludge hopper high-pressure cleaning pump circuit includes a motor M1, a thermal relay protection switch FR01, a contactor switch KM01, and a circuit breaker QF01. The power supply of the motor M1 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M1 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR01, the contactor switch KM01, and the circuit breaker QF01.

[0047] The camera cleaning pump circuit includes a motor M2, a thermal relay protection switch FR02, a contactor switch KM02, and a circuit breaker QF02. The power supply of the motor M2 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M2 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR02, the contactor switch KM02, and the circuit breaker QF02.

[0048] The sludge hopper solenoid valve circuit includes solenoid valve M3, relay switch KA03 and circuit breaker QF03. The power supply of solenoid valve M3 is connected to the C-phase power line of the power input terminal, and the other end is connected to the N line (neutral line). The power supply of solenoid valve M3 and the corresponding C-phase power line of the power input terminal are connected in sequence to relay switch KA03 and circuit breaker QF03.

[0049] The monitoring power circuit is connected to the A-phase power line and N-line (neutral line) of the power input terminal through a circuit breaker QF05. The monitoring power circuit powers the camera and obtains visual information of the sludge hopper on site through the camera: photos and videos. The visual information captured by the camera is sent to the control cabinet, processed by the PLC, and then displayed on the touch screen or other monitor.

[0050] The control panel is equipped with a touch screen, a motor and solenoid valve open button ST, a motor and solenoid valve close button SP, and a manual / remote control rotary switch SA for the motor and solenoid valve. The manual / remote control rotary switch SA is used to switch between local and remote gears. The motor and solenoid valve open button ST and the motor and solenoid valve close button SP are used to control the coils of contactor switches KM01 and KM02 and relay switch KA03 respectively in local mode.

[0051] The control cabinet is connected to the control panel and the operation panel respectively, and the automatic power supply circuit supplies power to the control cabinet.

[0052] Compared with the prior art, this application has the following beneficial effects:

[0053] By integrating the high-pressure cleaning pump circuit of the sludge hopper and the cleaning pump circuit of the camera, and with the monitoring of the control cabinet (PLC), operators can monitor the internal status of the sludge hopper in real time without entering it. Compared with traditional manual cleaning, operators can not only remotely monitor the use of the sludge hopper, but also operate the corresponding equipment control buttons on the control panel to achieve efficient, visual, safe and automated cleaning operations, reduce workload and ensure that the equipment operating conditions meet the requirements.

[0054] Please see Figure 3 In some embodiments, the main circuit also includes a parallel current measurement circuit. This current measurement circuit measures the current in the main circuit, for example, visually displaying the current in phases A, B, and C of the power supply during equipment operation. The current measurement circuit is connected in parallel with load circuits in the main circuit, such as the sludge hopper high-pressure cleaning pump circuit and the camera cleaning pump circuit, and is connected to the three-phase power supply to reflect the current operating current of the load. Operators can use the current measurement circuit to determine whether the control system is operating normally.

[0055] Please see Figure 3 In some embodiments, the current measurement circuit includes three ammeters and three current transformers. The three current transformers, PA1, PA2, and PA3, are connected to the A, B, and C phase power lines of the power input terminal. Each ammeter is connected to one current transformer, and the ammeters are mounted on the operation panel. Optionally, current transformers with a transformation ratio of 20 / 5 and an accuracy class of 0.2S 0.5 are installed on the A, B, and C phase power lines of the main circuit. Each current transformer is connected to a three-phase ammeter on the operation panel. When motors M1 and M2 are running, their operating current is sampled by the current transformers, and the ammeters display the current value of the corresponding phase in real time, thereby achieving monitoring of the main circuit current status.

[0056] Please see Figure 2 In some embodiments, the operation panel is provided with a motor and solenoid valve open indicator HG, a motor and solenoid valve closed indicator HR, and a motor fault indicator HY; the motor and solenoid valve open indicator HG and the motor and solenoid valve closed indicator HR are respectively connected in series to the corresponding auxiliary normally open contacts and auxiliary normally closed contacts of contactor switches KM01, KM02 and relay switch KA03; the motor fault indicator HY is connected to thermal relays FR01 and FR02 and is used to illuminate when motors M1 and M2 fail.

[0057] It should be noted that the motor and solenoid valve open button ST has two types of buttons: motor open button ST1 and solenoid valve open button ST2. The motor and solenoid valve close button SP has two types of buttons: motor close button SP1 and solenoid valve close button SP2. The motor and solenoid valve open indicator light HG has two types of indicator lights: motor open indicator light HG1 and solenoid valve open indicator light HG2. The motor and solenoid valve close indicator light HR has two types of indicator lights: motor close indicator light HR1 and solenoid valve close indicator light HR2.

[0058] Please see Figure 2 In some embodiments, a power indicator light is also provided on the left side of the touch screen on the operation panel.

[0059] In some embodiments, the motor and electric valve operation control circuit includes a local and remote control rotary switch. The rotary switch is used to switch between remote control and local control modes of the motor and electric valve operation control circuit. When the rotary switch is switched to remote mode, the motor and electric valve receive a remote control command and remotely start or stop the corresponding circuit according to the control logic.

[0060] Please see Figure 1 In some embodiments, the control system also includes an instrumentation control circuit connected to the control panel and control cabinet, through which the required equipment is connected and controlled.

[0061] Please see Figure 5 In some embodiments, the control loop of the instrumentation and control equipment also includes a sludge hopper material meter FIT101 and a sludge hopper weighing sensor PIT201. The sludge hopper material meter FIT101 and the sludge hopper weighing sensor PIT201 are connected to the control panel and control cabinet, and the touch screen displays the sludge status of the sludge hopper. The sludge hopper material meter FIT101 continuously measures the distance between the sludge surface in the hopper and the sensor, and converts it into a material level height. The weighing sensor PIT201 detects the total weight of the sludge through strain gauges. The pressure feedback of the sludge hopper weighing sensor PIT201 can be 4–20 mA, and the backup signal can also be 4–20 mA. The standard electrical signals output by both are sent to the PLC in the control cabinet. The PLC, as the data processing center, converts the raw signals into parameters with engineering significance (such as "material level: 75%", "weight: 1.2t"), and drives the touch screen to refresh the displayed content through an internal communication protocol. Operators can intuitively grasp the sludge accumulation status on the touch screen or other monitoring screen on the control box panel without on-site inspection, facilitating observable cleaning of the sludge hopper.

[0062] Please see Figure 1 In some embodiments, a circuit breaker QF04 is connected in sequence between the power supply of the self-controlled power circuit and the A-phase power line and N-phase power line of the power input terminal.

[0063] Please see Figure 5 In some embodiments, the control cabinet is controlled by a PLC, specifically the S7-200SMART, a small programmable logic controller launched by Siemens in 2012. In other embodiments, the PLC model may also be Mitsubishi FX3U, Omron CP1E, etc.

[0064] The working principle of this application is as follows:

[0065] like Figure 1 As shown, when the sludge hopper high-pressure cleaning pump M1 and circuit breaker QF01 are in the closed state, upon receiving an opening command, the contactor KM01 coil is energized, and the motor starts. When the sludge hopper solenoid valve M3 and circuit breaker QF03 are in the closed state, upon receiving an opening command, the relay KA03 coil is energized, and the solenoid valve opens. The circuit of the camera cleaning pump M2 has the same structure and principle as the circuit of the sludge hopper high-pressure cleaning pump M1, and will not be described further here.

[0066] like Figure 4 As shown, when the manual remote control rotary switch SA for the motor and solenoid valve is in the field position, pressing the motor and solenoid valve open button ST on the cabinet door energizes the coils of contactor KM and relay KA, causing the normally open contacts of contactor KM and relay KA to close. At this time, the start control circuit achieves self-holding, the motor and solenoid valve open indicator HG lights up, and the motor and solenoid valve closed indicator HR goes out. Pressing the stop button SP on the cabinet door de-energizes the coils of contactor KM and relay KA, causing the motor and solenoid valve closed indicator HR to light up and the motor and solenoid valve open indicator HG to go out. When the manual / remote control rotary switch SA for the motor and solenoid valve is in the remote position, the remote control cabinet (PLC) outputs a run signal, the normally open contact of the PLC closes, the coils of contactor KM and relay KA are energized, and their normally open contacts close. At this time, the motor and solenoid valve open indicator light HG illuminates, and the motor and solenoid valve closed indicator light HR goes out. The remote control cabinet (PLC) outputs a stop signal, the coils of contactor KM and relay KA are de-energized, the motor and solenoid valve closed indicator light HR illuminates, and the motor and solenoid valve open indicator light HG goes out. When the motor fault thermal relay FR trips, the normally closed contact of the thermal relay FR opens, and the normally open contact closes, de-energizing the motor control main circuit. The contactor KM coil is de-energized, the stop indicator light HR illuminates, the run indicator light HG goes out, and the fault indicator light HY illuminates.

[0067] like Figure 6As shown, the remote input / output schematic diagram for motors and solenoid valves includes remote control output, operating signal output, and remote control input. When the manual / remote control rotary switch SA of the motor or solenoid valve is in the remote position, a remote control signal can be output to the control cabinet (PLC). When the coils of contactor KM and relay KA are energized, an operating signal can be output to the control cabinet (PLC). When the thermal relay FR trips, an emergency signal can be output to the control cabinet (PLC). When the manual / remote control rotary switch SA of the motor or solenoid valve is in the remote position, the remote control control cabinet (PLC) can input a remote control signal. All motor and solenoid valve circuits are applicable to other motor and solenoid valve control circuit schematic diagrams, which will not be elaborated upon further below.

[0068] like Figure 7 , Figure 8 , Figure 9 As shown, Figure 7 , Figure 8 This is the circuit diagram for the PLC in the control cabinet. The PLC can monitor the real-time status of the equipment and remotely control the equipment via a touch screen. Relevant signals include remote start / stop signals, remote signals, running signals, and fault signals for the sludge hopper high-pressure cleaning pump M1; remote start / stop signals, remote signals, running signals, and fault signals for the camera cleaning pump M2; and remote start / stop signals, remote signals, and running signals for the sludge hopper solenoid valve M3. Figure 8 As shown.

[0069] This application discloses an observable and self-cleaning sludge hopper control system, which is used to solve the problems of high labor intensity, harsh working environment, safety risks such as poisoning, suffocation and falls from heights, low cleaning efficiency and long time consumption in the existing manual cleaning methods.

[0070] On-site operators can control the equipment locally outside the sludge hopper via the control panel. The system is equipped with a PLC touch screen, which can monitor the internal condition of the sludge hopper in real time, enabling efficient, visual, safe and automated cleaning operations, and facilitating on-site operation and maintenance.

[0071] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A sludge hopper control system, characterized in that, include: Control panel, main circuit, operator panel, and control cabinet; The main circuit is connected to the control panel. The main circuit includes a power indicator circuit, a sludge hopper high-pressure cleaning pump circuit, a camera cleaning pump circuit, a sludge hopper solenoid valve circuit, a monitoring power supply circuit, and an automatic control power supply circuit connected in parallel. The sludge hopper high-pressure cleaning pump circuit includes a motor M1, a thermal relay protection switch FR01, a contactor switch KM01, and a circuit breaker QF01. The power supply of the motor M1 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M1 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR01, the contactor switch KM01, and the circuit breaker QF01. The camera cleaning pump circuit includes a motor M2, a thermal relay protection switch FR02, a contactor switch KM02, and a circuit breaker QF02. The power supply of the motor M2 is connected to the A, B, and C phase power lines of the power input terminal. The power supply of the motor M2 and the corresponding A, B, and C phase power lines of the power input terminal are connected in sequence to the thermal relay protection switch FR02, the contactor switch KM02, and the circuit breaker QF02. The sludge hopper solenoid valve circuit includes a solenoid valve M3, a relay switch KA03, and a circuit breaker QF03. The power supply of the solenoid valve M3 is connected to the C-phase power line of the power input terminal, and the power supply of the solenoid valve M3 and the corresponding C-phase power line of the power input terminal are connected in sequence to the relay switch KA03 and the circuit breaker QF03. The power supply circuit of the monitoring power supply circuit is connected to the circuit breaker QF05 in sequence between the power supply and the A-phase power line and the N-phase power line of the power input terminal. The monitoring power supply circuit supplies power to the camera. The operation panel is equipped with a touch screen, a motor and solenoid valve open button ST, a motor and solenoid valve close button SP, and a manual / remote control rotary switch SA for the motor and solenoid valve. The manual / remote control rotary switch SA is used to switch between local and remote gears. The motor and solenoid valve open button ST and the motor and solenoid valve close button SP are used to control the coils of the contactor switches KM01 and KM02 and the relay switch KA03 respectively in local mode. The control cabinet is connected to the control panel and the operation panel respectively, and the automatic power supply circuit supplies power to the control cabinet.

2. The control system according to claim 1, characterized in that: The main circuit also includes a parallel current measurement circuit, which is used to measure the current in the main circuit.

3. The control system according to claim 2, characterized in that: The current measurement circuit includes three ammeters and three current transformers. The three current transformers are connected to the A, B, and C phase power lines of the power input terminal. One ammeter is connected to one current transformer. The ammeters are mounted on the operation panel.

4. The control system according to claim 1, characterized in that: The control panel is equipped with a motor and solenoid valve open indicator HG, a motor and solenoid valve closed indicator HR, and a motor fault indicator HY. The indicator lights HG for the motor and solenoid valve open and HR for the motor and solenoid valve closed are connected in series to the corresponding auxiliary normally open and auxiliary normally closed contacts of contactor switches KM01 and KM02 and relay switch KA03, respectively. The motor fault indicator light HY is connected to thermal relays FR01 and FR02 and is used to illuminate when motors M1 and M2 malfunction.

5. The control system according to claim 1, characterized in that: The power supply circuit of the self-controlled power supply is connected to the A-phase power line and the N-phase power line at the power input terminal via a circuit breaker QF04.

6. The control system according to claim 1, characterized in that: It also includes the control circuits of instrumentation and control equipment connected to the control panel and control cabinet.

7. The control system according to claim 6, characterized in that: The control loop of the instrumentation and control equipment also includes a sludge hopper material meter FIT101 and a sludge hopper weighing sensor PIT201. The sludge hopper material meter FIT101 and the sludge hopper weighing sensor PIT201 are connected to the control panel and control cabinet, and the touch screen displays the sludge status of the sludge hopper.

8. The control system according to claim 1, characterized in that: The control cabinet is controlled by a PLC, specifically an S7-200SMART PLC.

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