Method for Controlling a Cleaning Machine

Abstract

The present invention discloses a method for controlling a trash cleaner, which includes the following steps: the dirt detection and control module powered by weak electricity grasps the situation of the dirt on the trash cleaner; the dirt detection and control module is set to be able to control the connection or disconnection of the trash cleaner to the strong electricity power supply according to the situation of the dirt on the trash cleaner it grasps. Thus, the trash cleaner does not need to be continuously in an operating state, and only needs to control the startup of the trash cleaner when the dirt detection and control module detects that the dirt on the trash cleaner needs to be cleaned; thereby, the trash cleaner does not need to be continuously connected to the strong electricity power supply all the time, and since the dirt detection and control module is powered by a weak electricity power supply, therefore, the automatic startup and shutdown of the trash cleaner can be realized without continuous power supply from the strong electricity power supply and without anyone on duty for the trash cleaner.

Description

Technical Field

[0001] The present invention relates to the technical field of water engineering equipment, and particularly relates to a method for controlling a trash rack cleaner. Background Art

[0002] In water engineering, for example, in water conservancy and hydropower engineering, in order to efficiently clean the dirt in the water channel, a trash rack cleaner is generally installed at the water inlet of the water channel.

[0003] However, since the motion system (such as the drive motor) of the existing trash rack cleaners (especially the rotary trash rack cleaners) is generally controlled by strong electricity, according to the safety specifications of equipment operation, the trash rack cleaner must be attended when it is running (energized), and the power must be cut off when people leave. However, operating according to this installation specification will not only increase the labor cost, but also may cause a large amount of dirt to accumulate because the dirt cannot be processed in time, resulting in the trash rack cleaner having difficulty running or being damaged due to overload.

[0004] However, if in order to solve the problem of reducing labor costs, the manual attendance system is cancelled, and instead the trash rack cleaner is kept running (energized) all the time. Although this operation method can avoid the large accumulation of dirt and avoid the trash rack cleaner having difficulty running or being damaged due to overload. However, since the existing trash rack cleaners are all controlled by strong electricity, the trash rack cleaner is in a running state all the time in the unmanned state, which will not only bring potential safety hazards to equipment management, but also consume more electricity. Summary of the Invention

[0005] In order to solve at least one of the foregoing problems, according to one aspect of the present invention, a method for controlling a trash rack cleaner is provided.

[0006] The method for controlling the trash rack cleaner includes the following steps:

[0007] Master the situation of the dirt on the trash rack cleaner through a dirt detection and control module powered by weak electricity;

[0008] Set the dirt detection and control module to be able to control the connection or disconnection of the trash rack cleaner to the strong electricity power supply according to the situation of the dirt on the trash rack cleaner it masters.

[0009] Thus, the trash rack cleaner does not need to be continuously in a running state. Only when the dirt detection and control module detects that the dirt on the trash rack cleaner (such as the grid body of the trash rack cleaner) needs to be cleaned, the trash rack cleaner can be controlled to start (connected to the strong electricity power supply); thereby, the trash rack cleaner does not need to be always connected to the strong electricity power supply, and since the dirt detection and control module is powered by a weak electricity power supply, therefore, the automatic start and stop of the trash rack cleaner (the trash rack cleaner is disconnected from the strong electricity power supply) can be realized without continuous power supply by the strong electricity power supply and without anyone attending the trash rack cleaner.

[0010] In some embodiments, the dirt detection and control module powered by weak electricity grasps the dirt situation on the dirt cleaning machine in the following ways:

[0011] The dirt detection and control module is set to include a detection module and a first control module;

[0012] The detection module is set to be able to detect the water level conditions upstream and downstream of the dirt cleaning machine and generate a first detection signal to send to the first control module;

[0013] The first control module is set to be able to grasp the dirt situation on the dirt cleaning machine according to the first detection signal and control the connection or disconnection of the dirt cleaning machine to the strong electricity power supply according to the dirt situation on the dirt cleaning machine it grasps.

[0014] Judging the dirt situation on the dirt cleaning machine by detecting the water level conditions upstream and downstream of the dirt cleaning machine can not only judge in real time whether the dirt cleaning machine is blocked by dirt and improve the dirt cleaning efficiency, but also facilitate the integrated setting of the detection module in the water treatment facility. In addition, since the water level monitoring is not restricted by the type and size of the dirt, the detection module can be applied to more types of environments and conditions, has stronger environmental adaptability and applicability, and is also easier to expand to more monitoring points.

[0015] In some embodiments, a water level sensor is used as the detection module. Compared with other devices for detecting the water level, using a water level sensor to detect the water level has the beneficial effects of high detection accuracy, being able to provide multiple signal output options, being applicable to different liquids such as clean water, sewage, and corrosive liquids, having strong applicability, being easy to install and maintain, having good stability, high protection level, strong anti-interference ability (such as anti-electromagnetic interference), high reliability, long service life, and low cost.

[0016] In some embodiments, the water level sensors in the detection module are arranged in pairs and are respectively located upstream and downstream of the dirt cleaning machine. Thus, the first control module can know the water level conditions upstream and downstream of the dirt cleaning machine and the dirt situation on the dirt cleaning machine through the difference in the water levels upstream and downstream detected by the water level sensors.

[0017] In some embodiments, the first detection signal is the upstream water level condition detected by the water level sensor arranged in pairs and located upstream of the dirt cleaning machine and the downstream water level condition detected by the water level sensor located downstream of the dirt cleaning machine. Thus, the first control module can know the water level conditions upstream and downstream of the dirt cleaning machine and the dirt situation on the dirt cleaning machine through the difference in the water levels upstream and downstream detected by the water level sensors.

[0018] In some embodiments, the first control module is configured to be able to grasp the situation of the dirt on the dirt cleaning machine according to the first detection signal, and control the connection or disconnection of the dirt cleaning machine to the high-voltage power supply according to the situation of the dirt on the dirt cleaning machine grasped by it, which is achieved in the following way:

[0019] The first control module presets a set water level difference;

[0020] And presets a first delay time;

[0021] The first control module calculates the actual water level difference by calculating the upstream water level situation and the downstream water level situation received;

[0022] The first control module is configured to be able to compare the actual water level difference with the set water level difference, and when the duration that the actual water level difference is greater than the set water level difference is greater than the first delay time, control the dirt cleaning machine to be connected to the high-voltage power supply.

[0023] Thus, when the actual water level difference between the upstream and downstream is greater than the set water level difference, the dirt cleaning machine can be connected to the first power supply after waiting for the first delay time, avoiding the mis-start of the dirt cleaning machine caused by the water level difference caused by the water wave.

[0024] In some embodiments, the voltage of the low-voltage electricity is lower than 24V. Thus, the safety of the module operation can be ensured; moreover, even if the dirt detection control module is powered continuously, no high energy consumption will be generated; at the same time, the risk of damage to sensitive electronic devices can be reduced, the interference to signal transmission and electromagnetism can be reduced, less heat is generated during the operation process, which helps to reduce heat loss; in addition, since the power cable of the low-voltage power supply is generally thinner, it is convenient for the wiring and installation of the power cable, which helps to reduce the occupation of space.

[0025] In some embodiments, at least two groups of detection modules are provided and arranged in a direction perpendicular to the water flow direction. Thus, the detection accuracy of the detection module can be improved.

[0026] In some embodiments, the first control module is further configured such that when it controls the dirt cleaning machine to be connected to the high-voltage power supply, it also controls the dirt conveying device to be connected to the high-voltage power supply. Thus, when the dirt cleaning machine operates, the dirt unloaded by the dirt cleaning machine can be conveyed away from the dirt cleaning machine through the dirt conveying device, avoiding the accumulation of dirt near the dirt cleaning machine.

[0027] In some embodiments, a second delay time is preset;

[0028] The first control module is configured such that when the dirt cleaning machine is disconnected from the high-voltage power supply and the duration is greater than the second delay time, it controls the dirt conveying device to be disconnected from the high-voltage power supply.

[0029] Thus, after the sewage cleaning machine stops running, the sewage conveying device will still convey the sewage unloaded by the sewage cleaning machine to a place far away from the sewage cleaning machine, so as to avoid the accumulation of sewage near the sewage cleaning machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic flowchart of a method for controlling a sewage cleaning machine according to an embodiment of the present invention;

[0031] Figure 2 For Figure 1 It is a schematic flowchart of one embodiment of step S20 of the method for controlling the sewage cleaning machine shown;

[0032] Figure 3 For Figure 2 It is a schematic flowchart of one embodiment of step S23 shown;

[0033] Figure 4 It is a schematic diagram of the module structure of an automatic control system of a sewage cleaning machine according to an embodiment of the present invention;

[0034] Figure 5 For Figure 4 It is a schematic diagram of a part of the circuit of the control system of the sewage cleaning machine shown;

[0035] Figure 6 For Figure 4 It is a schematic diagram of another part of the circuit of the control system of the sewage cleaning machine shown;

[0036] Figure 7 It is a schematic flowchart of the operation mode of the control system of a sewage cleaning machine according to an embodiment of the present invention;

[0037] Figure 8 It is a schematic flowchart of the operation mode of the control system of a sewage cleaning machine according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0039] It should also be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising" and "including" not only include those elements, but also other elements not explicitly listed, or elements inherent in such a process, method, article, or device. Without further limitation, elements defined by the statement "comprising..." do not exclude the existence of additional identical elements in the process, method, article, or device comprising the said elements. The terms used in this text are generally those commonly used by those skilled in the art. If they are inconsistent with the commonly used terms, the terms in this text shall prevail.

[0040] In this text, the term "strong electricity" refers to a power supply with high power, large current, and low frequency, generally with a voltage above 24V. "Weak electricity" is a concept opposite to "strong electricity".

[0041] In this text, the "latching" in the term "switch and delay time relay latching" means using a switch to trigger a delay time relay, and the relay latches its state after the delay until the next control signal arrives.

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Figure 1 Schematically shows a method for controlling the sewage cleaning machine 30 according to an embodiment of the present invention.

[0044] As Figure 1 shown, the method for controlling the sewage cleaning machine 30 includes the following steps:

[0045] S20: The sewage detection control module 20 powered by weak electricity grasps the situation of the sewage on the sewage cleaning machine 30;

[0046] S30: The sewage detection control module 20 is set to be able to control the connection or disconnection of the sewage cleaning machine 30 to the strong electricity power supply according to the situation of the sewage on the sewage cleaning machine 30 it grasps.

[0047] As one specific embodiment of step S20, as Figure 2 shown, step S20 is implemented as including the following steps:

[0048] S21: Set the dirt detection control module 20 to include a detection module 21 and a first control module 22;

[0049] S22: Set the detection module 21 to be able to detect the water level conditions upstream and downstream of the dirt cleaner 30 and generate a first detection signal to send to the first control module 22;

[0050] S23: Set the first control module 22 to be able to grasp the dirt situation on the dirt cleaner 30 according to the first detection signal and control the connection or disconnection of the dirt cleaner 30 with the strong power supply according to the dirt situation on the dirt cleaner 30 it grasps.

[0051] Thus, the dirt cleaner 30 does not need to be continuously in an operating state. It only needs to be controlled to start when the dirt detection control module 20 detects that the dirt on the dirt cleaner 30 needs to be cleaned. For example, by detecting the water level conditions upstream and downstream of the dirt cleaner 30 to judge the dirt situation on the dirt cleaner 30. Therefore, the dirt cleaner 30 does not need to be continuously connected to the strong power supply; and since the dirt detection control module 20 is powered by a weak power supply, it is possible to realize the automatic start and stop of the dirt cleaner 30 without continuous power supply from the strong power supply and without anyone on duty for the dirt cleaner 30; moreover, when judging the dirt situation on the dirt cleaner 30 by detecting the water level conditions upstream and downstream of the dirt cleaner 30, it is possible to judge in real time whether the dirt cleaner 30 is blocked by dirt, improve the dirt cleaning efficiency, and at the same time, it is convenient for the integration setting of the detection module 21 in the water treatment facility. Meanwhile, the detection module 21 can be applied to more types of environments and conditions, has stronger environmental adaptability and applicability, and is also easier to expand to more monitoring points.

[0052] To implement the method for controlling the dirt cleaner of the present invention, a control system for the dirt cleaner 30 in an embodiment as shown in Figure 4 is provided.

[0053] As shown in Figure 4As shown, the control system of the sewage cleaner 30 includes a first water level sensor 211, a second water level sensor 212, a first control module 22, and a second power supply 42. The first water level sensor 211 is arranged upstream of the sewage cleaner 30 and is used to detect the water level upstream of the sewage cleaner 30. The second water level sensor 212 is arranged downstream of the sewage cleaner 30 and is used to detect the water level downstream of the sewage cleaner 30. The second power supply 42 is a weak current power supply. The second power supply 42 is used to continuously supply power to the first water level sensor 211 and the second water level sensor 212, so that the first water level sensor 211 can continuously detect the water level situation upstream of the sewage cleaner 30 and send the upstream water level situation signal to the first control module 22, and so that the second water level sensor 212 can continuously detect the water level situation downstream of the sewage cleaner 30 and send the downstream water level situation signal to the first control module 22. The second power supply 42 can also continuously supply power to the first control module 22 as needed. The first control module 22 processes the received upstream water level situation signal and downstream water level situation signal. For example, it calculates the difference between the upstream water level value and the downstream water level value to obtain the actual water level difference, and compares the obtained actual water level difference with the set water level difference preset by the first control module 22. The set water level difference can be determined according to experimental data. Generally, the larger the water inlet, the smaller the set water level difference; when the actual water level difference is greater than the set water level difference, the first control module 22 issues a first control signal to control the sewage cleaner 30 to be connected to the first power supply 41; when the actual water level difference is less than the set water level difference, the first control module 22 issues a second control signal to control the sewage cleaner 30 to be disconnected from the first power supply 41; the first power supply 41 is a strong current power supply.

[0054] Thus, the dirt cleaning machine 30 does not need to be continuously in an operating state. Only when the first control module 22 obtains that the difference between the upstream water level and the downstream water level (actual water level difference) detected by the first water level sensor 211 of the dirt cleaning machine 30 and the downstream water level detected by the second water level sensor 212 is greater than the set water level difference, the first control module 22 determines that the dirt on the dirt cleaning machine 30 needs to be cleaned. At this time, the dirt cleaning machine 30 can be controlled to be connected to the strong power supply by sending a first control signal. Thus, the dirt cleaning machine 30 does not need to be continuously connected to the strong power supply. Also, since the first water level sensor 211, the second water level sensor 212, and the first control module 22 are powered by a weak power supply, the automatic start and stop of the dirt cleaning machine 30 can be realized without continuous power supply from the strong power supply and without anyone on duty for the dirt cleaning machine 30, saving energy consumption while conforming to the safety operation procedures. Moreover, compared with other devices for detecting the water level by using a water level sensor, it has the beneficial effects of high detection accuracy, the ability to provide multiple signal output options, being applicable to different liquids such as clean water, sewage, and corrosive liquids, strong applicability, easy installation and maintenance, good stability, high protection level, strong anti-interference ability, high reliability, long service life, and low cost. At the same time, by detecting the water level conditions upstream and downstream of the dirt cleaning machine 30 to judge the dirt conditions on the dirt cleaning machine 30, it can not only monitor the dirt conditions on the dirt cleaning machine 30 in real time, quickly judge whether the dirt cleaning machine 30 is blocked by dirt, and improve the dirt cleaning efficiency; but also improve the detection accuracy; it is also convenient for the integrated setting of the first water level sensor 211 and the second water level sensor 212 in the water treatment facility; in addition, since the water level monitoring is not limited by the type and size of the dirt, the first water level sensor 211 and the second water level sensor 212 can be applied to more types of environments and conditions, have stronger environmental adaptability and applicability, and are also more easily extended to more monitoring points.

[0055] As one of the embodiments of the first control module 22, the first control module 22 can be an MCU or a single-chip microcomputer commonly used in the prior art, as long as it can realize the setting of the water level difference, and the specific model thereof is not limited in the present invention.

[0056] As some specific embodiments of the water level sensor, it can be a water level sensor commonly used in the prior art such as a capacitive water level sensor, an optoelectronic water level sensor, an ultrasonic water level sensor, a hydrostatic water level sensor, etc. The specific type and model of the water level sensor are not limited in the present invention. In some preferred embodiments, the first water level sensor 211 is arranged upstream of the grid body of the trash rack cleaner 30; the second water level sensor 212 is arranged downstream of the grid body of the trash rack cleaner 30. Thus, the first control module 22 can obtain the difference between the upstream and downstream water levels according to the water level conditions detected by the water level sensors upstream and downstream of the grid body, and then judge whether the dirt on the grid body reaches the degree that needs to be cleaned, so as to improve the detection accuracy of the water level sensor. In some preferred embodiments, the first water level sensor 211 and the second water level sensor 212 are arranged in the measuring holes of the gate piers. To avoid the water level sensor being directly exposed to water flow scouring or the external environment, reducing the risk of damage to the water level sensor; at the same time, it can ensure that the water level sensor can be stably installed, avoiding the movement or tilt of the water level sensor due to water flow fluctuations. In addition, it can also reduce the interference of water surface fluctuations, floating objects, water plants, etc. on the readings of the water level sensor, reduce the maintenance frequency of the water level sensor, improve the detection accuracy of the water level sensor and the continuity of data detection, and facilitate the regular calibration and maintenance of the water level sensor.

[0057] In some preferred embodiments, the first water level sensor 211 and the second water level sensor 212 are arranged in pairs. Thus, the first control module 22 can obtain the difference between the upstream and downstream water levels through the upstream water level condition detected by the first water level sensor 211 and the downstream water level condition detected by the second water level sensor 212. Further preferably, at least two pairs of the first water level sensor 211 and the second water level sensor 212 arranged in pairs are arranged along the vertical direction of the water flow to further improve the accuracy of the water level sensor detection.

[0058] In some embodiments, as Figure 4 shown, the first water level sensor 211 and the second water level sensor 212 arranged in pairs constitute the detection module 21 of an embodiment of the present invention. The upstream water level condition signal of the trash rack cleaner 30 detected by the first water level sensor 211 and the downstream water level condition signal of the trash rack cleaner 30 detected by the second water level sensor 212 are the first detection signals sent by the detection module 21 to the first control module 22.

[0059] In some embodiments, as Figure 4As shown in the figure, the first water level sensor 211 and the second water level sensor 212 which are arranged in pairs, together with the first control module 22, constitute the dirt detection control module 20 of an embodiment of the present invention. Thus, the cleaning machine 30 does not need to be continuously in an operating state. Only when the dirt detection control module 20 detects that the dirt on the cleaning machine 30 needs to be cleaned, it issues a first control signal to control the cleaning machine 30 to start operating. Therefore, the cleaning machine 30 does not need to be continuously connected to the strong power supply all the time; and since the dirt detection control module 20 is powered by a weak power supply, it is possible to realize the automatic start and stop of the cleaning machine 30 without continuous power supply from the strong power supply and without anyone on duty for the cleaning machine 30.

[0060] In some other embodiments, the detection module 21 and the first control module 22 together constitute the dirt detection control module 20 of an embodiment of the present invention.

[0061] In some embodiments, the weak power supply is a power supply with a voltage lower than 24V. This is to ensure the safety of the operation of the dirt detection control module 20; moreover, even if the dirt detection control module 20 is continuously powered, it will not generate a high energy consumption; at the same time, it can reduce the risk of damage to sensitive electronic devices, reduce interference with signal transmission and electromagnetism, generate less heat during operation, and help reduce heat loss; in addition, since the power cable of the weak power supply is generally thinner, it is convenient for the wiring and installation of the power cable and helps reduce the occupation of space. In some specific embodiments, the weak power supply is a solar cell or a storage battery, and any solar cell or storage battery that can provide a stable low-voltage power supply for the dirt detection control module 20 can be used as the weak power supply of the present invention. The present invention does not limit the specific form and model of the weak power supply. Selecting a solar cell as the weak power supply can achieve energy conservation; selecting a solar cell or a storage battery as the weak power supply can also achieve stable power supply for the dirt detection control module 20.

[0062] As one of the specific embodiments of step S23 of the present invention, as Figure 3 shown, step S23 is implemented to include the following steps:

[0063] S231: The first control module 22 presets a set water level difference;

[0064] S232: And presets a first delay time;

[0065] S233: The first control module 22 calculates the actual water level difference based on the upstream water level situation and the downstream water level situation received;

[0066] S234: The first control module 22 is configured to be able to compare the actual water level difference with the set water level difference, and when the duration for which the actual water level difference is greater than the set water level difference is greater than the first delay time, control the sewage cleaning machine 30 to be connected to the strong power supply.

[0067] Thus, the sewage cleaning machine 30 can be connected to the first power supply 41 after the actual water level difference between upstream and downstream is greater than the set water level difference and after the first delay time, avoiding the mis-start of the sewage cleaning machine 30 caused by the water level difference caused by water waves. 。

[0068] To implement the method for controlling the sewage cleaning machine of the present invention, a Figure 4 control system of the sewage cleaning machine 30 in an embodiment as shown is provided.

[0069] The control system of the sewage cleaning machine 30 can be implemented on the basis of the aforementioned control system of the sewage cleaning machine 30. As Figures 4 to 7 shown, the dirt detection control module further includes a first time relay 61, which presets a first delay time. The first delay time can be determined through experiments. For example, the first delay time is set within 20S. For example, the first delay time is 20S, 15S, 10S, 5S, etc. The first time relay 61 is configured such that when the dirt detection control module 20 issues a first control signal, the first time relay 61 disconnects the sewage cleaning machine 30 from the first power supply 41 after the first delay time and then reconnects the sewage cleaning machine 30 to the first power supply 41. Thus, when the actual water level difference between upstream and downstream is greater than the set water level difference, the sewage cleaning machine 30 can be connected to the first power supply 41 after waiting for the first delay time, avoiding the mis-start of the sewage cleaning machine 30 caused by the water level difference caused by water waves.

[0070] To further clarify the control system of the sewage cleaning machine 30 of the present invention, a partial circuit diagram of an embodiment of the control system of the sewage cleaning machine 30 is provided. As Figure 5 shown, the first water level sensor 211 is SQ1, the second water level sensor 212 is SQ2, the first control module 22 is the IM1 intelligent processing module (first control module), KA1 is the main control relay. The first water level sensor 211 is SQ1 and the second water level sensor 212 is SQ2 are respectively installed in front of and behind the sewage cleaning machine 30 for measuring the water level data of upstream and downstream of the sewage cleaning machine 30. The water level data is collected by the IM1 intelligent processing module, converted, and the actual water level difference is calculated. When the actual water level difference exceeds the set water level difference, the IM1 intelligent processing module controls the KA1 main control relay to be energized, and the normally open contact of the KA1 main control relay closes. The KA1 main control relay is used to control the closing of the main circuit switch of the sewage cleaning machine to connect the main circuit of the sewage cleaning machine to the first power supply.

[0071] To further clarify the control system of the sewage cleaning machine 30 of the present invention, another partial circuit diagram of an implementation manner of the control system of the sewage cleaning machine taking the rotary sewage cleaning machine as an example is provided, as Figure 6 shown. QF1 is the main circuit switch of the sewage cleaning machine, KT1 is a time delay on relay (the first time relay 61), and KM0 is the motor control contactor of the rotary motor. Under normal circumstances, the main circuit switch QF1 of the sewage cleaning machine is in the off state, and the sewage cleaning machine is in a state of being disconnected from the first power supply. When the main control relay KA1 is energized, the main control relay KA1 closes; then the main circuit switch QF1 of the sewage cleaning machine is energized, the main circuit switch QF1 of the sewage cleaning machine closes, and the main circuit is powered on; at the same time, the time delay on relay KT1 is energized and starts timing. When the timing is completed, the normally open contact of the time delay on relay KT1 closes, the motor control contactor KM0 of the rotary motor is energized, and the contacts of the motor control contactor KM0 of the rotary motor close, and the rotary motor of the sewage cleaning machine is energized and runs to start the sewage cleaning work. When the actual water level difference is less than the set water level difference, the intelligent processing module IM1 controls the main control relay KA1 to lose power, and the normally open contact of the main control relay KA1 opens; then the time delay on relay KT1 loses power, the normally open contact of the time delay on relay KT1 opens, the motor control contactor KM0 of the rotary motor loses power, and the rotary motor of the sewage cleaning machine stops working. In some specific embodiments, the first control module 22 controls the main circuit switch QF1 of the sewage cleaning machine to close or open through a switch opening and closing control device. Specifically, the first control module 22 controls the switch opening and closing control device to control the main circuit switch QF1 of the sewage cleaning machine to close or open; the main circuit switch QF1 of the sewage cleaning machine is the power switch; the switch opening and closing control device and the power switch can be placed in the first box. In some specific embodiments, the rotary motor can be a rake tooth rotary motor. In some specific embodiments, at least one of the main circuit switches KA1, QF1, KM0, and KT1 of the sewage cleaning machine can be of the coil type.

[0072] As a preferred embodiment of the present invention, a second delay time is preset; the first control module 22 is configured to control the sewage conveying device 50 to be disconnected from the strong power supply when the sewage cleaning machine 30 is disconnected from the strong power supply and the duration is greater than the second delay time. Thus, after the sewage cleaning machine 30 stops operating, the sewage conveying device 50 will still convey the sewage unloaded by the sewage cleaning machine 30 away from the sewage cleaning machine 30 to avoid the accumulation of sewage near the sewage cleaning machine 30.

[0073] To implement the method for controlling the sewage cleaning machine of the present invention, a control system of the sewage cleaning machine 30 in an implementation manner as Figure 4 shown is provided.

[0074] The control system of the sewage cleaning machine 30 can be implemented on the basis of the aforementioned control system of the sewage cleaning machine 30, as Figure 4and Figure 8 As shown, the dirt detection control module 20 is further configured such that when it issues a first control signal, it can control the dirt conveying device 50 to be connected to the first power supply 41; the dirt detection control module further includes a second time relay 62, which has a preset second delay time, and the second delay time can be determined through experiments. For example, the second delay time is set within 40S, such as the second delay time is 40S, 30S, 20S, etc.; the second time relay 62 is configured such that when the cleaning machine 30 is disconnected from the first power supply 41, the second time relay 62 keeps the dirt conveying device 50 connected to the first power supply 41 for the second delay time and then disconnects the dirt conveying device 50 from the first power supply 41. Thus, the dirt unloaded by the cleaning machine 30 can be conveyed away in real time, avoiding the normal operation of the cleaning machine 30 being affected by the accumulation of dirt near the cleaning machine 30; after the cleaning machine 30 stops operating, the dirt conveying device 50 will still convey the dirt unloaded by the cleaning machine 30 away from the cleaning machine 30, avoiding the accumulation of dirt near the cleaning machine 30. To further clarify the control system of the cleaning machine 30 of the present invention, as Figure 6As shown, KMT1 is a time-delay off relay (the second time relay 62), and KM1 is the motor control contactor of the dirt conveying device 50. When the main control relay KA1 is energized, the main control relay KA1 closes; then, the main circuit switch QF1 of the dirt cleaner is energized and the main circuit switch QF1 of the dirt cleaner closes, achieving the latching of the main circuit switch QF1 of the dirt cleaner and the time-delay off relay KMT1, and the main circuit is powered on; at the same time, the time-delay on relay KT1 is energized and starts timing. When the timing is completed, the normally open contact of the time-delay on relay KT1 closes, the motor control contactor KM0 of the slewing motor and the motor control contactor KM1 of the dirt conveying device 50 are energized, the contact of the motor control contactor KM0 of the slewing motor closes, the slewing motor of the dirt cleaner is energized and operates, starting the dirt cleaning work, and the contact of the motor control contactor KM1 of the dirt conveying device 50 closes, the transport motor of the dirt conveying device 50 is energized and operates, starting the dirt transport work. When the actual water level difference is less than the set water level difference, the intelligent processing module IM1 controls the main control relay KA1 to lose power, and the normally open contact of the main control relay KA1 opens; then, the time-delay on relay KT1 loses power, and the normally open contact of the time-delay on relay KT1 opens, the motor control contactor KM0 of the slewing motor of the dirt cleaner stops working, and the dirt cleaning work stops; at the same time, the time-delay off relay KMT1 loses power, and the time-delay off relay KMT1 starts the off timing; when the timing is completed, the normally closed contact of the time-delay off relay KMT1 opens, the main circuit switch QF1 of the dirt cleaner and the motor control contactor KM1 of the dirt conveying device 50 open, the main circuit is powered off, and the transport motor of the dirt conveying device 50 stops operating, and the dirt transport work stops. In some specific embodiments, at least one of KM1 and KMT1 can be of the coil type.

[0075] In some preferred embodiments of the present invention, there are at least two detection modules, which are arranged along a direction perpendicular to the water flow direction. Thereby, the accuracy of the detection by the detection module can be improved.

[0076] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A method for controlling a garbage cleaning machine, characterized in that: The following steps are involved: The situation of the dirt on the grid of the garbage cleaning machine is grasped by a dirt detection control module powered by weak electricity. The dirt detection control module includes a detection module and a first control module. The detection module can detect the water level situation upstream and downstream of the garbage cleaning machine, and generate a first detection signal to send to the first control module. There are at least two groups of detection modules, which are arranged in a direction perpendicular to the water flow direction; The first control module of the dirt detection control module is configured to control the dirt cleaning machine to be connected or disconnected with a strong power supply according to the dirt on the dirt cleaning machine grasped by the first control signal sent by the detection module therein; The garbage cleaning machine is a rotary garbage cleaning machine; The first control module is configured to grasp the condition of the dirt on the garbage cleaning machine according to the first detection signal, and control the garbage cleaning machine to be connected or disconnected with the strong power supply according to the grasped condition of the dirt on the garbage cleaning machine, which is achieved in the following manner: The first control module is preset with a set water level difference value; And a first delay time is preset; The first control module calculates the received upstream water level and downstream water level to obtain an actual water level difference; The first control module is configured to compare the actual water level difference with the set water level difference, and when the actual water level difference is greater than the set water level difference for a period greater than a first delay time, control the cleaning machine to be connected to a strong power supply; A water level sensor is used as the detection module.

2. The method for controlling a garbage cleaning machine according to claim 1, characterized in that: The water level sensors in the detection module are arranged in pairs and are respectively located upstream and downstream of the garbage cleaning machine.

3. The method for controlling a garbage cleaning machine according to claim 2, characterized in that: The first detection signal is an upstream water level condition detected by a water level sensor arranged in pairs and located upstream of the garbage cleaning machine, and a downstream water level condition detected by a water level sensor located downstream of the garbage cleaning machine.

4. The method for controlling a garbage cleaning machine according to claim 1, characterized in that: The voltage of the weak current is lower than 24V.

5. The method for controlling a garbage cleaning machine according to any one of claims 2 to 4, characterized in that: The first control module is further configured to control the waste conveying device to be connected to the strong power source while controlling the waste cleaning machine to be connected to the strong power source.

6. The method for controlling a garbage cleaning machine according to claim 5, characterized in that: There is a second delay time preset; The first control module is configured to control the waste conveying device to be disconnected from the strong power supply when the waste cleaning machine is disconnected from the strong power supply and the duration is greater than a second delay time.

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