Cleaning cart and method of controlling the same, piping system

Abstract

The application discloses a cleaning vehicle, a control method thereof and a pipeline system. The cleaning vehicle comprises a water pump, an unloading pipeline and a plurality of cleaning branches. The control method comprises the following steps: obtaining a control signal of a switch valve of a first cleaning branch in the plurality of cleaning branches; if the control signal is a closing signal, then after the switch valve of the unloading pipeline is opened under the condition that a first predetermined condition is met, the switch valve of the first cleaning branch is closed, wherein the first predetermined condition comprises that the switch valve of a second cleaning branch is in a closed state, and the second cleaning branch is a water path other than the first cleaning branch in the plurality of cleaning branches. According to the control method of the cleaning vehicle, the unloading pipeline can be opened before the cleaning branch is completely closed, so as to release the pressure of the pipeline system and avoid or weaken the water hammer effect.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and in particular to a control method for a cleaning vehicle, a control device for a cleaning vehicle, an electronic device, a computer-readable storage medium, and a cleaning vehicle. Background Technology

[0002] Because the cleaning truck operates on the road, the working conditions are relatively complex. When avoiding pedestrians and vehicles, the nozzles need to be quickly shut off, and when the work requirements change, different nozzles need to be quickly switched using a button. Since the water pump speed does not change when shutting off and switching between different working nozzles, a water hammer effect will occur. The water hammer effect has a certain impact on the water pump, motor, pipelines, and seals, especially easily causing damage to the gaskets and leading to water leakage in the pipelines.

[0003] The conventional approach is to reduce the speed of the motor first and then switch the valve to avoid the water hammer effect. However, the motor reduction takes too long and cannot meet the requirement of short nozzle switching time for the cleaning truck. Summary of the Invention

[0004] One object of the present invention is to provide a control method for a cleaning vehicle that can open the unloading pipeline before the cleaning branch is completely closed, so as to depressurize the pipeline system and avoid or reduce the water hammer effect.

[0005] Another objective of this invention is to provide a piping system for a cleaning vehicle that can implement the aforementioned control method.

[0006] Another object of the present invention is to provide a cleaning vehicle including the aforementioned piping system.

[0007] According to an embodiment of the present invention, a control method is used for a cleaning vehicle, the cleaning vehicle including a water pump, an unloading pipeline, and multiple cleaning branches, the outlet of the water pump being connected to the multiple cleaning branches, the unloading pipeline being used for depressurizing the multiple cleaning branches, and a switching valve for controlling the on / off state being provided on both the unloading pipeline and the multiple cleaning branches, the control method including: acquiring a control signal of the switching valve of a first cleaning branch among the multiple cleaning branches; if the control signal is a closing signal, then, when a first predetermined condition is met, controlling the switching valve of the unloading pipeline to open and then controlling the switching valve of the first cleaning branch to close, wherein the first predetermined condition includes: the switching valve of a second cleaning branch being in a closed state; the second cleaning branch being a water path other than the first cleaning branch among the multiple cleaning branches.

[0008] According to the control method of the cleaning vehicle of the present invention, the unloading pipeline can be opened before the cleaning branch is completely closed, so as to relieve pressure on the pipeline system and avoid or reduce the water hammer effect.

[0009] In addition, the control method for the cleaning vehicle according to the above embodiments of the present invention may also have the following additional technical features:

[0010] In some embodiments, the first predetermined condition further includes: the water pump speed is greater than or equal to the idle speed.

[0011] In some embodiments, the control method further includes: if the control signal is a shutdown signal, then when a second predetermined condition is met, controlling the switching valve of the first cleaning branch to close, the second predetermined condition including: the switching valve of the second cleaning branch is in a closed state, and the water pump speed is less than the idle speed.

[0012] In some embodiments, the method further includes: if the control signal is a shutdown signal, then when a third predetermined condition is met, the switching valve of the first cleaning branch is controlled to close, wherein the third predetermined condition includes at least one switching valve of the second cleaning branch being in an open state.

[0013] In some embodiments, the method further includes: obtaining the operating status of the switching valve of the first cleaning branch; if the switching valve of the first cleaning branch is in a closed state, and the switching valve of the second cleaning branch is in a closed state, and the water pump speed is greater than 0, controlling the switching valve of the unloading pipeline to open; if the switching valve of the first cleaning branch is in an open state, and the switching valve of the second cleaning branch is in a closed state, controlling the water pump to the operating speed, and controlling the switching valve of the unloading pipeline to close.

[0014] In some embodiments, the switching valve of the first cleaning branch includes a valve body, a handle, a first inductive switch, and a second inductive switch. The handle is rotatably connected to the valve body. The first inductive switch and the second inductive switch are used to detect the position of the handle. The control method includes: acquiring the state of the first inductive switch and the second inductive switch; if the first inductive switch is triggered, the first cleaning branch is in an open state; if the second inductive switch is triggered, the first cleaning branch is in a closed state.

[0015] In some embodiments, the method further includes: obtaining the operating status of the switching valve of the first cleaning branch; if the switching valve of the first cleaning branch is closed, and the switching valve of the second cleaning branch is closed, and the water pump speed is greater than 0, controlling the switching valve of the unloading pipeline to open; if the switching valve of the first cleaning branch is half-open, and the switching valve of the second cleaning branch is closed, controlling the water pump to a low-speed operating speed, and controlling the switching valve of the unloading pipeline to close; if the switching valve of the first cleaning branch is open, and the switching valve of the second cleaning branch is closed, controlling the water pump to a high-speed operating speed, and controlling the switching valve of the unloading pipeline to close.

[0016] In some embodiments, the switching valve of the first cleaning branch includes a valve body, a handle, a first inductive switch, and a second inductive switch. The handle is rotatably connected to the valve body. The first and second inductive switches are used to detect the position of the handle. The control method includes: acquiring the state of the first and second inductive switches; if the first inductive switch is triggered, the first cleaning branch is in an open state; if the second inductive switch is triggered, the first cleaning branch is in a closed state; if neither the first nor the second inductive switch is triggered, the first cleaning branch is in a half-open state.

[0017] The piping system of a cleaning vehicle according to an embodiment of the present invention includes: a water tank; a water pump, the inlet of which is connected to the water tank; a plurality of cleaning branches, the plurality of cleaning branches being connected to the outlet of the water pump; an unloading pipeline configured to depressurize the cleaning branches; and a controller configured to execute the steps of the aforementioned control method.

[0018] In some embodiments, the cleaning branch includes a first nozzle and a first switching valve, the first switching valve having an open state and a closed state, and the controller transmitting signals with the first switching valve.

[0019] In some embodiments, the first switching valve includes a valve body, a handle, and a position detection element. The handle is connected to the valve body and configured to drive the first switching valve to switch between the open state and the closed state. The position detection element is used to detect the position of the handle, and the controller transmits signals with the position detection element.

[0020] In some embodiments, the handle has a first actuating part and a second actuating part, and the position detection element includes a first sensing switch and a second sensing switch. In the open state, the first actuating part triggers the first sensing switch; in the closed state, the second actuating part triggers the second sensing switch.

[0021] In some embodiments, the handle includes a main body and an extension. The main body is configured as a cantilever with its hinged end rotatably connected to the valve body. The extension is connected to the hinged end of the main body and extends away from the handle along the extension direction of the main body. A first actuating part is provided on the main body, and a second actuating part is provided on the extension.

[0022] In some embodiments, in the open state, the main body is parallel to the axis of the valve body, and the first actuating part is opposite to the first sensing switch along the axis of the main body, triggering the first sensing switch; in the closed state, the main body is perpendicular to the axis of the valve body, and the second actuating part is opposite to the second sensing switch along the axis of the main body, triggering the second sensing switch.

[0023] In some embodiments, the first and second inductive switches are located on the same side of the handle along the axial direction of the valve body. The distance between the first inductive switch and the rotation axis of the handle along the axial direction is less than the distance between the second inductive switch and the rotation axis of the handle along the axial direction. In the projection along the valve body axis, the second inductive switch and the rotation axis of the handle are misaligned, and the first inductive switch and the rotation axis of the handle are opposite to each other. In the closed state, the second inductive switch and the main body are opposite to each other along the valve body axis, and in the open state, the first inductive switch and the rotation axis of the handle are opposite to each other along the valve body axis.

[0024] In some embodiments, the first inductive switch and the second inductive switch are arranged side by side.

[0025] In some embodiments, the first switching valve further includes a half-open state, in which the first sensing switch and the second sensing switch are in an untriggered state.

[0026] In some embodiments, the position detection element is a Hall element or a position switch.

[0027] A cleaning vehicle according to an embodiment of the present invention includes: a vehicle body; and a pipeline system disposed on the vehicle body according to the aforementioned pipeline system. Attached Figure Description

[0028] Figure 1 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0029] Figure 2 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0030] Figure 3 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0031] Figure 4This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0032] Figure 5 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0033] Figure 6 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0034] Figure 7 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0035] Figure 8 This is a flowchart illustrating a control method for a cleaning vehicle according to an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram of the control module of a cleaning vehicle according to an embodiment of the present invention.

[0037] Figure 10 This is a schematic diagram of the piping system of a cleaning vehicle according to an embodiment of the present invention.

[0038] Figure 11 This is a side view of a cleaning vehicle according to an embodiment of the present invention.

[0039] Figure 12 This is a top view of a cleaning vehicle according to an embodiment of the present invention.

[0040] Figure 13 This is a rear view of a cleaning vehicle according to an embodiment of the present invention.

[0041] Figure 14 This is a schematic diagram of a first switching valve according to an embodiment of the present invention, wherein the first switching valve is in a closed state.

[0042] Figure 15 This is a schematic diagram of a first switching valve according to an embodiment of the present invention, wherein the first switching valve is in a half-open state.

[0043] Figure 16 This is a schematic diagram of a first switching valve according to an embodiment of the present invention, wherein the first switching valve is in the open state.

[0044] Reference numerals: cleaning vehicle 100, vehicle body 10, chassis 11, rear work platform 12, piping system 20, water tank 21, water pump 22, inlet pipe 221, outlet pipe 222, water filter tee 23, controller 24, first nozzle 251, first switch valve 252, left duckbill 253a, right duckbill 253b, left counter-flushing 253c, right counter-flushing 253d, left rear spray 253e, right rear spray 253f, second switch valve 254, valve body 252a, handle 252b, first actuating part 252c, second actuating part 252d, first sensor switch 252e, second sensor switch 252f, unloading pipeline 26, third switch valve 261, bridge pipe 27, execution module 31, control module 32. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] As shown in Figure 9, this invention provides a cleaning vehicle 100 according to an embodiment. The cleaning vehicle 100 includes a water pump 22, an unloading pipeline 26, and multiple cleaning branches. The outlet of the water pump 22 is connected to the multiple cleaning branches, and the inlet of the water pump 22 is connected to a water tank 21. The water pump 22 can pump water out of the water tank 21 for cleaning. The cleaning branches are connected to the outlet of the water pump 22 and are configured for cleaning road surfaces, etc. Water pumped by the water pump 22 from the water tank 21 can be discharged through the cleaning branches to achieve the purpose of cleaning the road surface. The unloading pipeline 26 is used to depressurize the multiple cleaning branches. Each of the unloading pipeline and the multiple cleaning branches is equipped with a switch valve for controlling the on / off state.

[0047] Multiple cleaning branches may include a first cleaning branch and a second cleaning branch, wherein the first cleaning branch is a controlled cleaning branch, and the second cleaning branch is any other cleaning branch among the multiple cleaning branches besides the first cleaning branch.

[0048] like Figure 1 As shown, the present invention also provides a control method for a cleaning vehicle, the control method comprising:

[0049] The control signal of the on / off valve of the first cleaning branch among the multiple cleaning branches is acquired. This control signal can be an open signal, a close signal, etc., and can be sent via a button, knob, etc.; the control signal can also be a control signal generated by the cleaning vehicle based on its operating status; or it can be a control signal sent to the cleaning vehicle via a wireless signal communication device, etc.

[0050] If the control signal is a shutdown signal, then when a first predetermined condition is met, the switch valve of the unloading pipeline is opened, and then the switch valve of the first cleaning branch is closed. The first predetermined condition may include: the switch valve of the second cleaning branch among the plurality of cleaning branches is in a closed state. Furthermore, the second cleaning branch is a water path other than the first cleaning branch among the plurality of cleaning branches. Thus, when a signal is received to close the switch valve of the first cleaning branch, if the switch valve of the second cleaning branch is in a closed state, the unloading pipeline can be opened first to relieve pressure; after pressure relief, the switch valve of the first cleaning branch can then be opened. This avoids impact on the first cleaning branch and prevents water hammer effects.

[0051] According to the control method of the cleaning truck of the present invention, the switch valve of the unloading pipeline can be opened before the switch valve of the cleaning branch is completely closed, so as to relieve pressure on the pipeline system, avoid or reduce the water hammer effect, and improve the stability and safety of the pipeline system of the cleaning truck.

[0052] The first cleaning branch can include one or more cleaning branches; that is, one cleaning branch can be controlled at a time, or multiple cleaning branches can be controlled simultaneously. For example, if the control signal controls the closing of the switching valve of one cleaning branch, then the switching valve of that controlled cleaning branch is the switching valve of the first cleaning branch; if the control signal controls the closing of the switching valves of two or more cleaning branches, then the switching valves of these controlled branches are all the switching valves of the first cleaning branch.

[0053] Alternatively, the second cleaning branch may include one or more cleaning branches. When the second cleaning branch includes one cleaning branch, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that the switching valve of the second cleaning branch is in the closed state. Then, the switching valve of the unloading pipeline is opened, and subsequently, the switching valve of the first cleaning branch is closed. Conversely, when the second cleaning branch includes multiple cleaning branches, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that the switching valves of all the second cleaning branches are in the closed state. Then, the unloading pipeline is opened, and subsequently, the switching valves of the first cleaning branch are closed.

[0054] When there are multiple cleaning branches and their valves are controlled separately, if at least two cleaning branches have their valves open, closing some of the valves in one branch allows for pressure relief through the other branches, thus eliminating the need to open the unloading line. If all cleaning branches need to be closed, pressure relief can be achieved by opening the unloading line's valve, preventing water hammer. If some cleaning branches have their valves open while others are closed, and it is necessary to close all open valves (or close all open valves in one branch and switch to open valves in another), pressure relief can be achieved by opening the unloading line's valve, preventing water hammer.

[0055] In addition, such as Figure 2 To facilitate stable operation of the cleaning truck and reduce energy consumption, the first predetermined condition may further include: the water pump speed is greater than or equal to idle speed. That is, upon receiving a control signal to close the valve of the first cleaning branch, if the valve of the second cleaning branch is closed and the water pump speed is greater than or equal to idle speed, the valve of the unloading pipeline is opened first, and then the valve of the first cleaning branch is closed. At this time, the water pump speed is relatively high, and the water pressure of the pumped water is also relatively high. Directly closing the valve of the first cleaning branch would cause a significant impact on the water system. Therefore, this setting further reduces the impact on the first pipeline system, improving the stability and safety of the cleaning truck.

[0056] like Figure 3 In some embodiments of the present invention, if the control signal is a shutdown signal, then when a second predetermined condition is met, the switching valve of the first cleaning branch is controlled to close. That is, the second predetermined condition includes: the switching valve of the second cleaning branch is in a closed state, and the water pump speed is less than the idle speed. At this time, it is not necessary to open the switching valve of the unloading pipeline, but the switching valve of the first cleaning branch can be closed. Of course, if the switching valve of the unloading pipeline is in a closed state at this time, the closed state of the switching valve of the unloading pipeline can be maintained; if the switching valve of the unloading pipeline is in an open state at this time, the open state of the switching valve of the unloading pipeline can be maintained.

[0057] In other words, when the water pump speed is low, the water pressure pumped by the pump is relatively low, resulting in less impact on the pipeline system. In this case, the switch valve of the first cleaning branch can be directly closed, thus simplifying the operation. Of course, under this condition, the switch valve of the unloading pipeline can be opened first, and then the switch valve of the first cleaning branch can be closed, which can further improve the stability of the pipeline system.

[0058] The second cleaning branch can include one or more cleaning branches. When the second cleaning branch includes one cleaning branch, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that the switching valve of the second cleaning branch is in the closed state, and the water pump speed is less than the idle speed. In this case, the switching valve of the first cleaning branch can be closed without opening the switching valve of the unloading pipeline. Conversely, when the second cleaning branch includes multiple cleaning branches, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that the switching valves of all the second cleaning branches are in the closed state, and the water pump speed is less than the idle speed. In this case, the switching valve of the first cleaning branch can be closed without opening the switching valve of the unloading pipeline.

[0059] like Figure 4 In some embodiments, the method further includes: if the control signal is a shutdown signal, then controlling the switching valve of the first cleaning branch to close when a third predetermined condition is met. The third predetermined condition includes: the switching valve of at least one cleaning branch in the second cleaning branch is in the open state. That is, when the received control signal is to control the switching valve of the first cleaning branch to close, if the switching valve of at least one cleaning branch in the second cleaning branch is in the open state, the switching valve of the first cleaning branch can be closed without opening the switching valve of the unloading pipeline. In this case, the switching valve of the first cleaning branch can be closed without opening the switching valve of the unloading pipeline; that is, if the switching valve of the unloading pipeline is in the closed state at this time, the closed state of the switching valve of the unloading pipeline can be maintained; if the switching valve of the unloading pipeline is in the open state at this time, the open state of the switching valve of the unloading pipeline can be maintained.

[0060] In conjunction with the foregoing, the second cleaning branch may include one or more cleaning branches. When the second cleaning branch includes one cleaning branch, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that the switching valve of the second cleaning branch is in an open state, and the switching valve of the first cleaning branch can be closed without opening the unloading pipeline. Conversely, when the second cleaning branch includes multiple cleaning branches, upon receiving a closing signal from the switching valve of the first cleaning branch, it is determined that at least one of the switching valves of these second cleaning branches is in an open state, and the switching valve of the first cleaning branch can be closed without opening the switching valve of the unloading pipeline.

[0061] In addition, the water pump, unloading pipeline, etc. can be adjusted according to the different operating states of the switch valve of the first cleaning branch. The switch valve of the cleaning branch in different embodiments will be described below.

[0062] Example 1

[0063] like Figure 5 In some embodiments, the method further includes:

[0064] The operating status of the on / off valve of the first cleaning branch is obtained. This operating status can be open, closed, etc., and can be determined by detecting the on / off valve status of the first cleaning branch; it can also be determined by detecting the flow rate of the first cleaning branch; or it can be determined by using a user input signal, etc. Of course, the operating status of the on / off valve of the first cleaning branch can also be determined by other methods.

[0065] If the switch valve of the first cleaning branch is closed, the switch valve of the second cleaning branch is closed, and the water pump speed is greater than 0, open the switch valve of the unloading pipeline. At this time, the switch valves of multiple cleaning branches are all closed (for example, when the cleaning truck is idling or when all the switch valves of the cleaning branches are closed during operation). In order to facilitate the rapid start of the cleaning truck, the water pump speed can be greater than 0. At this time, the unloading pipeline can be opened to relieve pressure in the cleaning pipeline and maintain the stability of the cleaning truck.

[0066] If the switch valve of the first cleaning branch is in the closed state, and the switch valve of at least one of the second cleaning branches is in the open state, and the water pump speed is equal to 0, the switch valve of the unloading pipeline can be opened or closed.

[0067] If the switch valve of the first cleaning branch is in the closed state, and the switch valve of at least one of the second cleaning branches is in the open state, and the water pump speed is greater than 0, then the unloading pipeline is in the closed state.

[0068] If the switch valve of the first cleaning branch is in the open state and the switch valve of the second cleaning branch is in the closed state, the water pump is controlled to its operating speed, and the unloading pipeline is closed. This prevents pressure relief in the unloading pipeline from affecting the stable operation of the cleaning truck, improving the stability of the cleaning truck's operation and saving energy. The operating speed of the water pump is greater than the idle speed, and the idle speed is greater than 0. For example, the idle speed is set within the range of 5% to 50% of the water pump's operating speed.

[0069] If the switch valve of the first cleaning branch is in the open state, and the switch valve of at least one of the plurality of cleaning branches is in the open state, control the water pump to the working speed and close the unloading pipeline.

[0070] Example 2

[0071] In some embodiments of the cleaning vehicle of the present invention, the switching valve of the first cleaning branch includes a valve body, a handle, and a position detection element. The handle is connected to the valve body and configured to drive the switching valve of the cleaning branch to switch between an open state and a closed state. The position detection element is used to detect the position of the handle to obtain the operating state of the switching valve of the cleaning branch. The controller transmits signals with the position detection element. The position detection element may include a first inductive switch and a second inductive switch. The handle is rotatably connected to the valve body, and the first and second inductive switches are used to detect the position of the handle.

[0072] like Figure 6 The control method of the cleaning vehicle includes:

[0073] The states of the first and second sensing switches are obtained; wherein the operating states of the first and second sensing switches can be triggered and untriggered states, and the first and second sensing switches can be Hall elements or position switches. For example, such as Figures 14 to 16 The handle is rotatably connected to the valve body. The handle has a first actuation point and a second actuation point, which are respectively located on opposite sides of the handle's hinge position. The position detection element includes a first inductive switch and a second inductive switch, which are arranged side by side. When the valve of the cleaning branch is in the open state, the first actuation point triggers the first inductive switch; when the valve of the cleaning branch is in the closed state, the second actuation point triggers the second inductive switch. In this way, during the rotation of the handle, it is possible to quickly determine whether the valve of the cleaning branch is in the open or closed state, simplifying the control strategy of the valve of the cleaning branch. It is also possible to easily switch the state of the valve of the cleaning branch by adjusting the position of the handle, and then adjust the operating state of the water pump, unloading pipeline, and valve of the cleaning branch through the controller.

[0074] If the first sensor switch is triggered, the valve of the first cleaning branch is in the open state; if the second sensor switch is triggered, the valve of the first cleaning branch is in the closed state. This detection method simplifies the structure of the control valve and enables rapid acquisition of the status of the valve of the first cleaning branch, thereby improving the operating efficiency of the cleaning vehicle.

[0075] Example 3

[0076] like Figure 7 In other embodiments of the present invention, the switching valve of the first cleaning branch may have an open state, a closed state, and a partially open state. The method further includes:

[0077] The operating status of the on / off valve of the first cleaning branch is obtained. This operating status can be open, closed, or partially open, etc., and can be determined by detecting the on / off valve status of the first cleaning branch; it can also be determined by detecting the flow rate of the on / off valve of the first cleaning branch; or it can be determined by using a user input signal, etc. Of course, other methods can also be used to determine the operating status of the on / off valve of the first cleaning branch.

[0078] If the switch valve of the first cleaning branch is closed, and the switch valve of the second cleaning branch among the multiple cleaning branches is closed, and the water pump speed is greater than 0, the switch valve of the unloading pipeline is opened; at this time, the switch valves of multiple cleaning branches are all closed (for example, when the cleaning truck is idling, or when all the switch valves of the cleaning branches are closed during operation, etc.). In order to facilitate the rapid start of the cleaning truck, the water pump speed can be greater than 0. At this time, the unloading pipeline can be opened to realize the pressure relief of the cleaning pipeline and maintain the stability of the cleaning truck.

[0079] If the switch valve of the first cleaning branch is in the closed state, and the switch valve of at least one of the second cleaning branches among the multiple cleaning branches is in the open state, and the water pump speed is equal to 0, the switch valve of the unloading pipeline can be opened or closed.

[0080] If the switch valve of the first cleaning branch is in the closed state, and the switch valve of at least one of the second cleaning branches is in the open state, and the water pump speed is greater than 0, then the unloading pipeline is in the closed state.

[0081] If the switch valve of the first cleaning branch is in a half-open state and the second cleaning branch is in a closed state, control the water pump to a low speed and close the unloading pipeline. At this time, the water pump can be run at a low speed to provide a slightly lower working pressure, so as to facilitate the adjustment of water pressure and flow rate according to the working status of the cleaning vehicle, adapt to different working conditions, improve the stability of the cleaning vehicle operation, and save energy.

[0082] If the switch valve of the first cleaning branch is in a semi-open state, and the switch valve of at least one of the second cleaning branches is in an open state, the operating speed of the water pump is controlled, and the unloading pipeline is closed. In this case, the operating speed of the water pump needs to be adjusted according to the operating status of the switch valves of multiple cleaning branches. For example, when the switch valve of the first cleaning branch is in a semi-open state, and at least one switch valve of the second cleaning branch is in an open state, the water pump can be adjusted to high-speed operation to meet the operating requirements of the switch valves of multiple cleaning branches. Of course, these are just some embodiments of the present invention; different control strategies can be set for different cleaning vehicles. Specifically, the operating speed of the water pump is greater than the idle speed, and the idle speed is greater than 0. Furthermore, the high-speed operating speed of the water pump is greater than the low-speed operating speed. For example, the idle speed can be set within the range of 5% to 50% of the high-speed operating speed of the water pump. For example, the low-speed operating speed can be set within the range of 20% to 80% of the high-speed operating speed.

[0083] If the switch valve of the first cleaning branch is in the open state and the switch valve of the second cleaning branch is in the closed state, the water pump is controlled to operate at high speed, and the unloading pipeline is closed. This prevents pressure relief in the unloading pipeline from affecting the stable operation of the cleaning truck, improves the stability of the cleaning truck's operation, and saves energy.

[0084] If the switch valve of the first cleaning branch is in the open state, and the switch valve of at least one of the second cleaning branches is in the open state, control the water pump to the working speed and close the unloading pipeline.

[0085] Example 4

[0086] In some embodiments of the cleaning vehicle of the present invention, the switching valve of the first cleaning branch includes a valve body, a handle, and a position detection element. The handle is connected to the valve body and configured to drive the switching valve of the cleaning branch to switch between an open state, a closed state, and a half-open state. The position detection element is used to detect the position of the handle to obtain the operating state of the switching valve of the cleaning branch. The controller transmits signals with the position detection element. The position detection element may include a first inductive switch and a second inductive switch. The handle is rotatably connected to the valve body, and the first inductive switch and the second inductive switch are used to detect the position of the handle.

[0087] like Figure 8 The control method of the cleaning vehicle includes:

[0088] The states of the first and second sensing switches are obtained; wherein the operating states of the first and second sensing switches can be triggered and untriggered states, and the first and second sensing switches can be Hall elements or position switches. For example, such as Figures 14 to 16The handle is rotatably connected to the valve body. The handle has a first actuation point and a second actuation point, which are respectively located on opposite sides of the hinge position of the handle. The position detection element includes a first inductive switch and a second inductive switch, which are arranged side by side. When the valve of the cleaning branch is in the open state, the first actuation point triggers the first inductive switch; when the valve of the cleaning branch is in the closed state, the second actuation point triggers the second inductive switch. In this way, during the rotation of the handle, it is possible to quickly determine whether the valve of the cleaning branch is in the open or closed state, and set the state between the open and closed states as a half-open state. This simplifies the control strategy of the valve of the cleaning branch and allows for easy switching of the valve state by adjusting the position of the handle. In turn, the controller can adjust the operating state of the water pump, the unloading pipeline, and the valve of the cleaning branch.

[0089] If the first sensor switch is triggered, the valve of the first cleaning branch is in the open state; if the second sensor switch is triggered, the valve of the first cleaning branch is in the closed state; if neither the first nor the second sensor switch is triggered, the valve of the first cleaning branch is in the half-open state. This detection method simplifies the structure of the control valve and enables rapid acquisition of the status of the valve of the first cleaning branch, thereby improving the operating efficiency of the cleaning vehicle.

[0090] like Figure 9 The control device for the cleaning vehicle 100 according to an embodiment of the present invention includes:

[0091] An execution module is used to send control signals to the switching valves of the first cleaning branch; the control signals can be open signals, close signals, etc., and the execution module can be a button, knob, etc.; it can also be another controller 24 generated according to the operating status of the cleaning vehicle 100; or a communication device suitable for providing wireless or wired signals to the cleaning vehicle 100.

[0092] The control module is used to acquire control signals from the execution module and execute the steps of the control method for the cleaning vehicle 100 as described above. This control module can be a controller 24 such as a CPU or PLC.

[0093] According to the control device of the cleaning vehicle 100 of the present invention, the unloading pipeline 26 can be opened before the switching valve of the cleaning branch is completely closed, so as to relieve pressure on the pipeline system 20 and avoid or reduce the water hammer effect.

[0094] An electronic device according to an embodiment of the present invention includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, it implements the steps of the control method for the cleaning vehicle 100 as described above.

[0095] According to an embodiment of the present invention, a computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the control method for the cleaning vehicle 100 as described above.

[0096] like Figure 10 According to an embodiment of the present invention, the piping system 20 of the cleaning vehicle 100 includes a water tank 21 and a water pump 22. The water tank 21 can be used for water storage, and the inlet of the water pump 22 is connected to the water tank 21. The water pump 22 can pump water out of the water tank 21 for cleaning. The piping system 20 also includes a cleaning branch line connected to the outlet of the water pump 22. This cleaning branch line is configured for cleaning road surfaces, etc. Water pumped from the water tank 21 by the water pump 22 can be discharged through the cleaning branch line to achieve the purpose of cleaning the road surface, etc.

[0097] The piping system 20 may further include an unloading pipe 26, configured for depressurizing the cleaning branch. When the unloading pipe 26 is opened, it can depressurize the piping system 20. Specifically, when it is necessary to close the cleaning branch, the unloading pipe 26 can be opened first to depressurize the piping system 20, and then the cleaning branch can be closed to avoid water hammer. Additionally, the piping system 20 may also include a controller 24, which executes the steps according to the aforementioned control method during operation.

[0098] The piping system 20 of the cleaning vehicle 100 according to an embodiment of the present invention has an unloading pipe 26, which can be opened before the cleaning branch is completely closed, so as to relieve pressure on the piping system 20 and avoid or reduce the water hammer effect.

[0099] In conjunction with the foregoing, the cleaning branch of the present invention may include a first nozzle 251 and a first switching valve 252. The first switching valve 252 may be configured to have an open state and a closed state. When the first switching valve 252 is in the open state, the corresponding first nozzle is opened, thereby spraying water outward. The controller 24 can transmit signals with the first switching valve 252. The operating state of the first nozzle 251 can be switched through the first switching valve 252, thereby realizing rapid adjustment of the first nozzle and avoiding safety hazards to pedestrians or unsuitable road surfaces.

[0100] In addition, the controller 24 can also transmit signals to the water pump 22 and control the power of the water pump 22 according to the status of the cleaning branch. Thus, the operating power of the water pump 22 can be adjusted according to the status of the cleaning branch to adjust the operating water pressure of the cleaning branch and meet the cleaning requirements.

[0101] The first switching valve 252 can be an electrically controlled valve, a pneumatically controlled valve, or a manual valve, facilitating the switching of the cleaning branch between open and closed states. When the first switching valve 252 is an electrically controlled valve, buttons, knobs, wireless control modules, wired control modules, etc., can be added to control it. When the first switching valve 252 is another type of valve, a corresponding control method can be set. Furthermore, this invention is mainly described using a water cannon as the first nozzle, but this is not a limitation on the scope of protection of this invention. The first nozzle can also be a left duckbill, a right duckbill, a left counter-current jet, a right counter-current jet, a left rear spray, or a right rear spray, etc.

[0102] Taking the first switching valve 252 as a manually controlled valve as an example, the opening and closing of the first switching valve 252 can be controlled by manually driving a handle, etc. This control method is particularly suitable for the water cannon of a cleaning vehicle. This invention is mainly described using the example of setting the first switching valve 252 corresponding to the water cannon as a manually controlled valve, but this is not a limitation on the scope of protection of this invention.

[0103] like Figures 14 to 16 The first switching valve 252 may include a valve body 252a, a handle 252b, and a position detection element. The handle 252b is connected to the valve body 252a and configured to drive the cleaning branch to switch between an open and closed state. The position detection element is used to detect the position of the handle 252b to obtain the operating status of the cleaning branch. The controller 24 transmits signals with the position detection element. Through the detection of the position detection element, the position of the handle 252b can be quickly determined, thereby judging the state of the cleaning branch, so as to control the cleaning branch. The handle 252b can be used to manually control the switching of the cleaning branch between the open and closed states.

[0104] like Figures 14 to 16The handle 252b is rotatably connected to the valve body 252a. The handle 252b has a first actuating part 252c and a second actuating part 252d. The first actuating part 252c and the second actuating part 252d can be respectively disposed on opposite sides of the hinge position of the handle 252b. The position detection element includes a first inductive switch 252e and a second inductive switch 252f. The first inductive switch 252e and the second inductive switch 252f can be arranged side-by-side, facilitating the installation and wiring of the position detection element. Simultaneously, the first inductive switch 252e and the second inductive switch 252f can be positioned in a roughly consistent environment, thereby improving the stability and detection accuracy of the first inductive switch 252e and the second inductive switch 252f. In the open state, the first actuating part 252c triggers the first inductive switch 252e; in the closed state, the second actuating part 252d triggers the second inductive switch 252f. In this way, during the rotation of the handle 252b, it is possible to quickly determine whether the cleaning branch is in the open or closed state, which simplifies the control strategy of the cleaning branch and allows for easy switching of the cleaning branch state by adjusting the position of the handle 252b. In turn, the controller 24 can adjust the working state of the water pump 22, the unloading pipeline 26, and the cleaning branch.

[0105] like Figures 14 to 16 The handle 252b includes a main body 2521 and an extension 2522. The main body 2521 is configured as a cantilever with its hinge end rotatably connected to the valve body 252a. The extension 2522 is connected to the hinge end of the main body 2521 and extends away from the handle 252b along the extension direction of the main body 2521. A first actuating part 252c is provided on the main body 2521, and a second actuating part 252d is provided on the extension 2522. This facilitates the use of the handle 252b, and ensures that when the handle 252b is rotated, the first actuating part 252c and the second actuating part 252d can stably trigger the position detection element, improving the accuracy of the detection results.

[0106] Furthermore, in the open state, the main body 2521 is perpendicular to the axis of the valve body 252a, and the first actuating part 252c is opposite to the first sensor switch along the axis of the main body 2521; in the closed state, the main body 2521 is parallel to the axis of the valve body 252a, and the second actuating part 252d is opposite to the second sensor switch along the axis of the main body 2521. This further improves the accuracy of the detection results.

[0107] The first sensor switch 252e and the second sensor switch 252f are located on the same side of the handle 252b along the axial direction of the valve body 252a. The distance between the first sensor switch 252e and the handle rotation axis along the axial direction is less than the distance between the second sensor switch 252f and the handle rotation axis along the axial direction of the handle 252b. In the projection along the valve body axis, the second sensor switch 252f is misaligned with the handle rotation axis, while the first sensor switch 252e is opposite to the handle rotation axis. In the closed state, the second sensor switch 252f is opposite to the main body 2521 along the valve body axis; in the open state, the first sensor switch 252e is opposite to the handle rotation axis along the valve body axis. This facilitates the detection of the handle position by the first sensor switch 252e and the second sensor switch 252f, avoids mutual interference between them, improves the accuracy of the detection results, and prevents accidental activation.

[0108] In addition, such as Figures 10 to 16 In some embodiments of the present invention, the first switching valve may also have a partially open state, which can be a state between an open state and a closed state. This allows for convenient adjustment of the water spray pressure of the first nozzle, meeting more operational needs.

[0109] The aforementioned first nozzle can be a water cannon. The cleaning branch includes a water cannon and a first switching valve 252, which can be used to adjust the opening and closing state of the water cannon. The cleaning branch can be in a state between half-open, open, and closed; that is, the valve in the cleaning branch can be fully open, fully closed, or partially open. The cleaning branch can be adjusted to the open, closed, or half-open state by adjusting the valve opening.

[0110] Since the water cannon is generally controlled by personnel at the rear of the cleaning truck 100, the low-pressure water pump 22 needs to maintain a high speed while the cleaning truck 100 is in operation. The operator of the rear work platform 12 can manually (without communicating with the driver) open or close the valve at any time according to changes in working conditions, quickly controlling the start and stop of the water cannon operation. The valve opening can be changed at any time during water cannon operation to quickly control different head and flow rates. Furthermore, because electrically controlled valves require a relatively long time to open and close, they cannot meet the requirements for rapid valve opening adjustment; therefore, water cannons generally use manual ball valves.

[0111] Optionally, the position detection element can be a Hall element or a position switch. This allows for rapid detection of the position of the handle 252b.

[0112] The cleaning branch in this invention can be one or more. When there is only one cleaning branch, the unloading pipe 26 can be opened to release pressure before the cleaning branch is closed, thus avoiding water hammer. When there are multiple cleaning branches, they can be controlled synchronously so that the unloading pipe 26 can be opened to release pressure before all cleaning branches are closed. Alternatively, they can be controlled separately so that the unloading pipe 26 can be opened to release pressure before all cleaning branches are closed. Furthermore, when there are multiple cleaning branches, switching between different cleaning branches is also possible. When the first cleaning branch is open and the others are closed, and it is necessary to switch from the first cleaning branch to the second, the unloading pipe 26 can be opened to release pressure, followed by closing the first cleaning branch and opening the second cleaning branch to avoid water hammer. Of course, the above descriptions are merely some embodiments of this invention and are not intended to limit the scope of protection of this invention.

[0113] like Figure 10 In some embodiments, multiple cleaning branches are included, and these multiple cleaning branches are connected to the outlet of the water pump 22 and transmit signals to the controller 24. Specifically, when there are multiple cleaning branches, and these multiple cleaning branches are controlled separately, if at least two cleaning branches are operating, when one cleaning branch is shut down, pressure can be relieved through the other cleaning branches, so it is not necessary to open the unloading pipe 26; if multiple cleaning branches need to be shut down, pressure can be relieved by opening the unloading pipe 26, thereby avoiding the water hammer effect; if some of the multiple cleaning branches are open and others are closed, and it is necessary to shut down the open cleaning branches (or to shut down all the open cleaning branches and switch cleaning branches), pressure can be relieved by opening the unloading pipe 26, thereby avoiding the water hammer effect. Therefore, by setting multiple cleaning branches, road maintenance can be easily achieved, and different working needs of the pipeline system 20 can be met.

[0114] Combination Figures 10 to 13 In some embodiments,

[0115] The cleaning branch includes a second nozzle and a second switching valve 254. The second switching valve 254 is connected between the water pump 22 and the second nozzle, and transmits signals with the controller 24. The second switching valve 254 is configured to control the on / off connection between the second nozzle and the water pump 22. The second switching valve 254 can control the connection or disconnection between the second nozzle and the water pump 22. The second switching valve 254 can be an electrically controlled valve, a manually controlled valve, or a pneumatically controlled valve, and its control switch can be located in the cab or other positions on the cleaning vehicle 100.

[0116] Combination Figures 1 to 4In some embodiments, the second nozzle can be a left duckbill 253a, a right duckbill 253b, a left counter-flushing nozzle 253c, a right counter-flushing nozzle 253d, a left rear spray nozzle 253e, or a right rear spray nozzle 253f. For example, the cleaning water path includes a cleaning branch that includes a left duckbill 253a; or, the cleaning water path includes a cleaning branch that includes a left counter-flushing nozzle 253c; or, the cleaning water path includes a cleaning branch that includes both a left duckbill 253a and a right duckbill 253b; or the cleaning branch includes two cleaning branches, one including a left duckbill 253a and the other including a right duckbill 253b; or the cleaning branch includes two cleaning branches, one including both a left duckbill 253a and a right duckbill 253b, and the other including a left counter-flushing nozzle 253c. In the embodiment shown in the accompanying drawings of this invention, the left duckbill 253a is connected in series with a second switching valve 254 to form a cleaning branch; the right duckbill 253b is connected in series with a second switching valve 254 to form a cleaning branch; the left counter-flushing 253c is connected in series with a second switching valve 254 to form a cleaning branch; the right counter-flushing 253d is connected in series with a second switching valve 254 to form a cleaning branch; the left rear spray 253e is connected in series with a second switching valve 254 to form a cleaning branch; and the right rear spray 253f is connected in series with a second switching valve 254 to form a cleaning branch.

[0117] Of course, the above description is only some embodiments of the present invention. Since the number of branches, the second nozzle, etc. in the cleaning water path can have a variety of combinations, those skilled in the art can easily understand this after learning about the technical solution protected by the present invention, and the applicant will not elaborate further.

[0118] In addition, in the aforementioned embodiment, the left duckbill 253a is located on the front left side of the cleaning vehicle 100; the right duckbill 253b is located on the front right side of the cleaning vehicle 100; the left counter-spray 253c is located on the front right side of the cleaning vehicle 100 and is adapted to spray to the left; the right counter-spray 253d is located on the front left side of the cleaning vehicle 100 and is adapted to spray to the right; the left rear spray 253e is located on the rear left side of the cleaning vehicle 100; the right rear spray 253f is located on the rear right side of the cleaning vehicle 100; and the water cannon is located at the rear of the cleaning vehicle 100. Multiple second nozzles can operate from different positions to meet different road cleaning needs.

[0119] like Figure 11In some embodiments, the piping system 20 includes a bridge pipe 27 connected to the outlet of the water pump 22 and extending in the front-rear direction. Multiple cleaning branches are included, each located at the front and rear of the cleaning vehicle 100. The cleaning branch at the front of the cleaning vehicle 100 is connected to the front end of the bridge pipe 27, and the cleaning branch at the rear of the cleaning vehicle 100 is connected to the rear end of the bridge pipe 27. The water pump 22 can be positioned in the middle of the cleaning vehicle 100, which facilitates a stable counterweight by bringing the center of gravity of the cleaning vehicle 100 closer to the center in the front-rear direction. Furthermore, the bridge pipe 27 allows for water supply to multiple cleaning water paths, enabling individual water supply to multiple cleaning water paths and simplifying the piping.

[0120] Alternatively, the unloading pipe 26 can be connected to the bridge pipe 27. Or, the unloading pipe 26 can be directly connected to the water pump 22.

[0121] like Figure 10 and Figure 12 In some embodiments,

[0122] The unloading pipeline 26 includes a third switch valve 261, one end of which is connected to the outlet of the water pump 22, and the other end is connected to the water tank 21. The third switch valve 261 allows the unloading pipeline 26 to be opened and closed, enabling pressure relief via the unloading pipeline 26 or maintaining a high water pressure in the pipeline system 20, thereby optimizing the efficiency and effectiveness of the cleaning operation.

[0123] The aforementioned second nozzle can be a left duckbill 253a, a right duckbill 253b, a left counter-current jet 253c, a right counter-current jet 253d, a left rear spray 253e, or a right rear spray 253f, etc.; of course, the cleaning branch including the water cannon or other cleaning branch can also be set to have an open state and a closed state.

[0124] The following describes a pipeline system 20 according to some embodiments of the present invention with reference to the accompanying drawings. The pipeline system 20 can be applied to a cleaning vehicle 100, especially to the low-pressure pipeline in a pure electric cleaning vehicle 100. Of course, it can also be applied to a non-pure electric cleaning vehicle 100 (such as a fuel vehicle, a hybrid vehicle, etc.). The pipeline system 20 can realize the start and stop of the pressure-clearing nozzle in the cleaning branch, and the pipeline can be automatically unloaded when switching quickly to avoid pipeline impact caused by water hammer effect, while not affecting the normal use of the water cannon.

[0125] like Figures 10 to 16The piping system 20 of the present invention includes: a bridge pipe 27, a water pump 22, a water tank 21, a water filter tee 23, an unloading pipe 26, a water cannon, a left duckbill 253a, a right duckbill 253b, a left counter-flushing 253c, a right counter-flushing 253d, a left rear spray 253e, and a right rear spray 253f, etc. Each of the left duckbill 253a, right duckbill 253b, left counter-flushing 253c, right counter-flushing 253d, left rear spray 253e, and right rear spray 253f is connected in series with a second switching valve 254, and the unloading pipe 26 is connected in series with a third switching valve 261. A manual ball valve (i.e., a first switching valve 252) is connected in series with the water cannon. The manual ball valve has a handle 252b, a first inductive switch 252e, and a second inductive switch 252f. In addition, the cleaning vehicle 100 has a chassis 11, a rear working platform 12, and a water pump 22 with an outlet pipe 222 and an inlet pipe 221.

[0126] The basic working principle of the pipeline system 20 can include: the motor controls the drive motor to rotate, the motor drives the water pump 22 to draw water from the water tank 21, the water is pressurized by the water pump 22, and the water at a certain pressure flows out through the water pump 22 outlet pipe 222; the control valve of the second nozzle is controlled by an independent button in the cab, the button can control the opening and closing of each control valve, select different second nozzles to operate, and when switching between the second nozzles and when the water pump 22 stops, the unloading pipeline 26 is used to reduce the impact of water hammer effect; when all nozzles are not operating and the motor is not turned off, the unloading pipeline 26 is opened, and the motor will idle at a lower speed set by the program.

[0127] Specifically, 1) When the working nozzle needs to be closed to avoid pedestrians or vehicles, taking the left duckbill 253a as an example: when the controller 24 (e.g., PLC) detects the left duckbill 253a closing signal, and at this time other working nozzles are not working and the water pump 22 speed is greater than idle speed, the electronic control system will first unload the third switch valve 261 in the pipeline 26 to reduce the pressure of the pipeline system 20, and then close the second switch valve 254 in the left duckbill 253a.

[0128] 2) When switching the working nozzle, taking the switch from left duckbill 253a to right counter-jet 253d as an example, there are two control methods:

[0129] In the first scenario, the operator first closes the left duckbill 253a and then opens the right counter-flushing 253d. If there is no unloading pipeline 26 at this time, the impact will be very large. Therefore, when the controller 24 detects the signal that the left duckbill 253a is closed, if other working nozzles are not working at this time (the first switch valve 252 and the second switch valve 254 are both closed) and the water pump 22 speed is greater than idle speed, it will first open the third switch valve 261 in the unloading pipeline 26, then close the second switch valve 254 in the left duckbill 253a, and finally open the second switch valve 254 in the right counter-flushing 253d, and the right counter-flushing 253d will start working. At this time, the unloading pipeline 26 can ensure the stable operation of the system.

[0130] The second method involves the operator first opening the right counter-flushing valve 253d, then closing the left duckbill valve 253a. This operation has a smaller impact on the system, and the unloading pipeline 26 does not need to be opened.

[0131] Additionally, when the controller 24 detects the opening signal of the right counter-current 253d, if other working nozzles are in operation at this time (with control valves in the open state), the unloading pipeline 26 will not work (i.e., the unloading pipeline 26 will be in the closed state).

[0132] In addition, for cleaning branches that are manually controlled (or cleaning branches that are in a semi-open state), the following control methods can be used, taking the control of water cannon operation as an example:

[0133] 1. Set a first inductive switch 252e and a second inductive switch 252f (which can be a proximity switch) in a suitable spatial position on the manual ball valve of the water cannon (i.e., the aforementioned first switch valve 252). Modify the handle 252b of the water cannon by adding a first trigger part 252c and a second trigger part 252d, introduce the signal required for electronic control, and set two high and low gears and two working speeds.

[0134] 2. When the cleaning truck 100 is in the driving standby state (the vehicle is driving normally, and the motor of the upper structure drives the water pump 22 to rotate at idle speed), the handle 252b is in the closed position. At this time, the second sensor switch 252f senses the second touch part 252d on the handle 252b, and the cleaning branch where the water cannon is located is in the closed state; at this time, the unloading pipeline 26 can be opened.

[0135] 3. When the operator of the rear work platform 12 needs to use the water cannon for operation, rotate the handle 252b to the half-open position. At this time, the first sensor switch 252e cannot sense the first touch part 252c, and the second sensor switch 252f cannot sense the second touch part 252d. The controller 24 receives the electrical signal from the second sensor switch 252f and changes it, controlling the water pump 22 to speed up to the low speed range. The unloading pipeline 26 is closed, and the water cannon starts to work.

[0136] 4. When it is necessary to increase the working speed of the water pump 22, the handle 252b can be turned to the open position. At this time, the first touch part 252c triggers the first induction switch 252e. The electrical signal of the first induction switch 252e changes, the unloading pipeline 26 is closed, and the water pump 22 speeds up to the high speed.

[0137] 5. When the handle 252b returns to the half-open position, the first sensor switch 252e cannot sense the first touch part 252c and the second sensor switch 252f cannot sense the second touch part 252d. The electrical signal of the first sensor switch 252e changes, while the electrical signal of the second sensor switch 252f does not change. The unloading pipeline 26 is in the closed state, and the water pump 22 reduces its speed to the low speed gear.

[0138] 6. When the handle 252b returns to the closed position, the second sensor switch 252f senses the second actuating part 252d on the handle 252b, the electrical signal of the second sensor switch 252f changes, the unloading pipeline 26 opens, and the water pump 22 drops to idle speed.

[0139] According to the pipeline system 20 of this embodiment, the impact of water hammer effect on the pipeline system 20 during temporary closure and switching of the working nozzle is reduced, thereby reducing potential equipment failure and improving equipment stability. Furthermore, this invention adds a proximity switch intelligent control device to the water cannon, enabling intelligent control and two-speed operation of the water cannon without changing the operator's operating habits or affecting operational convenience.

[0140] When a traditional cleaning truck 100 needs to add special features such as a self-priming circuit or molten salt stirring, it is necessary to lay special pipes outside the water tank 21. However, after adding the unloading pipe 26 to the cleaning truck 100, the unloading pipe 26 can be used as a self-priming circuit and a molten salt stirring circuit, eliminating the need for external pipes, ensuring the consistency of the appearance of the modified vehicle in the announcement, and saving manufacturing costs.

[0141] This invention makes water cannon operation more energy-efficient: In traditional water cannon operation, due to the inconvenience of communication between the personnel on the rear working platform 12 and the personnel in the driver's cab, the water pump 22 speed is generally set to the maximum working speed during water cannon operation, and then the flow rate and head are adjusted by different opening degrees of the manual ball valve. There is a certain energy loss when the ball valve is half open. This invention, by sensing the position of the ball valve handle 252b, adjusts the water pump 22 to a lower working speed when the ball valve is half open, while meeting the operational requirements, making it more energy-efficient and effective.

[0142] In addition, the proximity switch sensor at the water cannon in this invention can be replaced by other types of sensors, as long as they can sense displacement changes; the proximity switch sensor at the water cannon can be replaced by an electronically controlled button, which provides the signal required for electronic control.

[0143] This solution will change the traditional operating habits of water cannons and increase the number of operating steps. Taking this invention as an example:

[0144] A. Two electrical control buttons are installed on the rear working platform 12 for the water cannon, namely the low-speed working button and the high-speed working button. Both buttons are initially in the off state and the electrical signal is 0.

[0145] B. When in standby mode (the vehicle is driving normally, no nozzle is in operation, the motor is idling, and the unloading pipeline 26 is open), and the water cannon needs to be operated at a low speed, first turn the manual ball valve handle 252b to the open position, then press the low speed operation button. At this time, the unloading pipeline 26 will be closed, and the motor will drive the water pump 22 to speed up to the low speed, and the water cannon will start to work.

[0146] C. If the high-speed working button is pressed at this time, the low-speed electrical signal returns to 0, the high-speed electrical signal is 1, the unloading pipeline 26 remains closed, and the motor will drive the water pump 22 to continue to accelerate to the high-speed position.

[0147] D. If the water cannon is working at the high speed and the low speed working button is pressed, the high speed signal will return to 0 and the low speed signal will be 1. The unloading pipeline 26 will remain closed and the water pump 22 will reduce its speed to work at the low speed.

[0148] E. If it is necessary to stop the operation, press the low gear working button again. The low gear signal will return to 0, the unloading pipeline 26 will open, the motor will slow down to idle speed, and finally turn the manual ball valve handle 252b to the closed position.

[0149] The cleaning vehicle 100 according to an embodiment of the present invention includes: a vehicle body 10; and a pipeline system 20 provided on the vehicle body 10 according to the aforementioned pipeline system 20. By providing the aforementioned pipeline system 20, an unloading pipeline 26 is provided, which can be opened before the cleaning branch is completely closed, so as to relieve pressure on the pipeline system 20 and avoid or reduce the water hammer effect.

[0150] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "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 accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0151] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0152] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0153] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0154] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0155] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method for a cleaning vehicle, characterized in that, The cleaning vehicle includes a water pump, an unloading pipeline, and multiple cleaning branch lines. The outlet of the water pump is connected to the multiple cleaning branch lines. The unloading pipeline is used to depressurize the multiple cleaning branch lines. Each of the unloading pipeline and the multiple cleaning branch lines is equipped with a switching valve for controlling on / off switching. The control method includes: Obtain the control signal of the on / off valve of the first cleaning branch among the plurality of cleaning branches; If the control signal is a shutdown signal, then when the first predetermined condition is met, the switch valve of the unloading pipeline is opened, and then the switch valve of the first cleaning branch is closed. The first predetermined condition includes: the switch valve of the second cleaning branch is in the closed state; the second cleaning branch is a water path other than the first cleaning branch among the plurality of cleaning branches; The first predetermined condition also includes: the water pump speed is greater than or equal to the idle speed; The control method further includes: If the control signal is a shutdown signal, then when the second predetermined condition is met, the switching valve of the first cleaning branch is controlled to close. The second predetermined condition includes: the switch valve of the second cleaning branch is in the closed state, and the water pump speed is less than the idle speed; The control method further includes: If the control signal is a shutdown signal, then when the third predetermined condition is met, the switching valve of the first cleaning branch is controlled to close. The third predetermined condition includes that the switch valve of at least one of the second cleaning branches is in the open state.

2. The control method according to claim 1, characterized in that, The method further includes: Obtain the operating status of the switching valve of the first cleaning branch; If the switch valve of the first cleaning branch is closed, the switch valve of the second cleaning branch is closed, and the water pump speed is greater than 0, control the switch valve of the unloading pipeline to open. If the switch valve of the first cleaning branch is in the open state and the switch valve of the second cleaning branch is in the closed state, control the water pump to the working speed and control the switch valve of the unloading pipeline to close.

3. The control method according to claim 2, characterized in that, The switching valve of the first cleaning branch includes a valve body, a handle, a first inductive switch, and a second inductive switch. The handle is rotatably connected to the valve body. The first and second inductive switches are used to detect the position of the handle. The control method includes: Obtain the states of the first and second sensor switches; If the first sensor switch is triggered, the first cleaning branch is in the open state; if the second sensor switch is triggered, the first cleaning branch is in the closed state.

4. The control method according to claim 1, characterized in that, The method further includes: Obtain the operating status of the switching valve of the first cleaning branch; If the switch valve of the first cleaning branch is closed, the switch valve of the second cleaning branch is closed, and the water pump speed is greater than 0, control the switch valve of the unloading pipeline to open. If the switch valve of the first cleaning branch is in a half-open state and the switch valve of the second cleaning branch is in a closed state, control the water pump to a low speed setting and control the switch valve of the unloading pipeline to close. If the switch valve of the first cleaning branch is in the open state and the switch valve of the second cleaning branch is in the closed state, control the water pump to high speed and control the switch valve of the unloading pipeline to close.

5. The control method according to claim 4, characterized in that, The switching valve of the first cleaning branch includes a valve body, a handle, a first inductive switch, and a second inductive switch. The handle is rotatably connected to the valve body. The first and second inductive switches are used to detect the position of the handle. The control method includes: Obtain the states of the first and second sensor switches; If the first sensor switch is triggered, the first cleaning branch is in the open state; if the second sensor switch is triggered, the first cleaning branch is in the closed state; if neither the first nor the second sensor switch is triggered, the first cleaning branch is in the half-open state.

6. A piping system (20) for a cleaning vehicle (100), characterized in that, include: Water jug ​​(21); A water pump (22), the inlet of which is connected to the water tank (21); Multiple cleaning branches are connected to the outlet of the water pump (22); An unloading pipeline (26) is configured to depressurize the cleaning branch; A controller (24) configured to perform the steps of the control method according to any one of claims 1-5.

7. The piping system (20) of the cleaning vehicle (100) according to claim 6, characterized in that, The cleaning branch includes a first nozzle (251) and a first switching valve (252), the first switching valve (252) having an open state and a closed state, and the controller (24) transmitting signals with the first switching valve (252).

8. The piping system (20) of the cleaning vehicle (100) according to claim 7, characterized in that, The first switching valve (252) includes a valve body (252a), a handle (252b), and a position detection element. The handle (252b) is connected to the valve body (252a) and configured to drive the first switching valve (252) to switch between the open state and the closed state. The position detection element is used to detect the position of the handle (252b). The controller (24) transmits signals with the position detection element.

9. The piping system (20) of the cleaning vehicle (100) according to claim 8, characterized in that, The handle (252b) has a first actuating part (252c) and a second actuating part (252d), and the position detection element includes a first sensing switch (252e) and a second sensing switch (252f). In the open state, the first actuating part (252c) triggers the first sensing switch (252e); in the closed state, the second actuating part (252d) triggers the second sensing switch (252f).

10. The piping system (20) of the cleaning vehicle (100) according to claim 9, characterized in that, The handle (252b) includes a main body (2521) and an extension (2522). The main body (2521) is configured as a cantilever with its hinge end rotatably connected to the valve body (252a). The extension (2522) is connected to the hinge end of the main body (2521) and extends away from the handle (252b) along the extension direction of the main body (2521). A first actuating part (252c) is provided on the main body (2521), and a second actuating part (252d) is provided on the extension (2522).

11. The piping system (20) of the cleaning vehicle (100) according to claim 10, characterized in that, In the open state, the main body (2521) is parallel to the axis of the valve body (252a), and the first actuating part (252c) is opposite to the first sensing switch (252e) along the axis of the main body, triggering the first sensing switch (252e); in the closed state, the main body (2521) is perpendicular to the axis of the valve body (252a), and the second actuating part (252d) is opposite to the second sensing switch (252f) along the axis of the main body (2521), triggering the second sensing switch (252f). And / or, the first sensor switch (252e) and the second sensor switch (252f) are located on the same side of the handle (252b) along the axial direction of the valve body (252a). The distance between the first sensor switch (252e) and the rotation axis of the handle (252b) along the axial direction is less than the distance between the second sensor switch (252f) and the rotation axis of the handle (252b) along the axial direction. In the projection along the axis of the valve body (252a), the second sensor switch (252f) and the rotation axis of the handle are misaligned, and the first sensor switch (252e) and the rotation axis of the handle are opposite. In the closed state, the second sensor switch (252f) and the main body (2521) are opposite to each other along the axis of the valve body. In the open state, the first sensor switch (252e) and the rotation axis of the handle are opposite to each other along the axis of the valve body.

12. The piping system (20) of the cleaning vehicle (100) according to claim 9, characterized in that, The first sensor switch (252e) and the second sensor switch (252f) are arranged side by side; And / or, the first switching valve (252) also includes a half-open state, in which the first sensing switch (252e) and the second sensing switch (252f) are in a non-triggered state.

13. The piping system (20) of the cleaning vehicle (100) according to claim 8, characterized in that, The position detection device is a Hall element or a position switch.

14. A cleaning vehicle (100), characterized in that, include: Vehicle body (10); The piping system (20) according to any one of claims 6-13 is provided on the vehicle body (10).

Images