A waterway exhaust system and a washing and sweeping vehicle

Abstract

The utility model discloses a waterway exhaust system, comprising a first water tank, a communication pipeline, a communication branch, a communication shunt, a water pump, a first controller and a second controller. When water needs to be added to the first water tank, the first controller is closed and the second controller is opened, water enters the communication pipeline from the water inlet and outlet, and squeezes the air in the communication pipeline, the communication branch and the communication shunt from bottom to top until entering the first water tank located above the water inlet and outlet. At this time, the air near the water pump has entered the first water tank from the communication shunt. After the water is added, the first controller is opened and the second controller is closed. There is water near the water pump, and the water pump can be directly operated, avoiding the situation that air infiltrates into the water flow and enters the water pump, and the water pump is in high-speed idling for a long time, thereby extending the service life of the high-pressure water pump. The utility model also discloses a washing and sweeping vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of water channel systems for washing and sweeping vehicles, in particular to a water channel exhaust system and a washing and sweeping vehicle. Background Art

[0002] Currently common washing and sweeping vehicles all have a front clean water tank, a rear clean water tank and a high-pressure water system. There is often a height difference between the bottom plates of the front clean water tank and the rear clean water tank, and they are connected through a connecting water pipe under the bottom plate. To ensure that the clean water in the clean water tank and the water system can be completely drained, the filling / draining port is often designed at the lowest position of the connecting water pipe. At the same time, to ensure that the clean water in the clean water tank can achieve maximum utilization, the high-pressure water circuit at a higher position often needs to take water from a lower position of the connecting water pipe.

[0003] In this way, when the clean water in the clean water tank and the water system is completely drained, the entire system is filled with air. When the vehicle stops working and water is added again, since the central control valve group is in a closed state, the air between the water intake of the high-pressure water circuit and the central control valve group is blocked in the water system and cannot be discharged smoothly.

[0004] When the vehicle starts high-pressure water operation, due to the weak self-priming ability of the plunger-type high-pressure water pump, it takes a long time to exhaust the air blocked in front of the water inlet of the high-pressure water pump. The high-pressure water pump is in high-speed idling for a long time, which will cause high temperature to damage the water pump seal, and air infiltration into the water flow and into the water pump will cause high-pressure cavitation, damaging the water pump piston and cylinder, greatly reducing the life of the high-pressure water pump.

[0005] Therefore, how to extend the service life of the high-pressure water pump is a technical problem that technicians in this field currently need to solve. Utility Model Content

[0006] In view of this, the first object of the utility model is to provide a waterway exhaust system to extend the service life of a high-pressure water pump;

[0007] The second purpose of the utility model is to provide a washing and sweeping vehicle.

[0008] In order to achieve the above first purpose, the utility model provides the following technical solutions:

[0009] A water exhaust system comprises a first water tank, a connecting pipeline, a connecting branch, a connecting shunt, a water pump, a first controller and a second controller, wherein:

[0010] The communication pipeline includes a water inlet and an outlet, and the first water tank is arranged above the water inlet and the outlet, and the first water tank is connected to the communication pipeline;

[0011] The connecting branch is a branch of the connecting pipeline, and the water pump and the first controller are arranged on the connecting branch, and the first controller is used to control the opening and closing of the connecting branch;

[0012] The first end of the communication branch is connected to the first water tank, and the second end of the communication branch is connected to the communication branch;

[0013] The second controller is arranged on the Unicom branch and is used to control the opening and closing of the Unicom branch.

[0014] Optionally, in the above-mentioned water exhaust system, the first end of the connecting branch is arranged close to the bottom of the first water tank, and the second end of the connecting branch is arranged upstream of the water pump.

[0015] Optionally, in the above-mentioned water exhaust system, the water exhaust system further comprises a water filter, and the water filter is arranged between the water inlet and outlet and the water pump;

[0016] The second end of the communication branch is connected to the highest position between the water filter and the water pump.

[0017] Optionally, in the above-mentioned water exhaust system, the water exhaust system also includes a second water tank, the bottom plate of the first water tank is higher than the bottom plate of the second water tank in the vertical direction, the first end of the connecting pipe is connected to the bottom of the first water tank, and the second end of the connecting pipe is connected to the bottom of the second water tank.

[0018] Optionally, in the above-mentioned water exhaust system, the first controller is a mid-route control water valve, and the mid-route control water valve is arranged downstream of the water pump.

[0019] Optionally, in the above-mentioned water exhaust system, the second controller is an exhaust shut-off valve.

[0020] Optionally, in the above-mentioned water exhaust system, the water exhaust system also includes a pneumatic electromagnetic reversing valve, port A of the pneumatic electromagnetic reversing valve is connected to one of the first controller and the second controller, and port B of the pneumatic electromagnetic reversing valve is connected to the other of the first controller and the second controller.

[0021] Optionally, in the above-mentioned water exhaust system, the water exhaust system further includes a filter, and the filter is arranged between the first water tank and the second controller.

[0022] Optionally, in the above-mentioned water exhaust system, the water exhaust system also includes a liquid level sensor, and the liquid level sensor is arranged inside the connecting branch.

[0023] The water circuit exhaust system provided by the utility model, when water needs to be added to the first water tank, the first controller is closed and the second controller is opened, water enters the connecting pipeline from the water inlet and outlet, and squeezes the air in the connecting pipeline, the connecting branch and the connecting branch from bottom to top until it enters the first water tank located above the water inlet and outlet, at which time the air near the water pump has entered the first water tank from the connecting branch, after the water adding is completed, the first controller is opened and the second controller is closed, the vicinity of the water pump is filled with water, the water pump can be directly operated, air is avoided from infiltrating into the water flow and entering the water pump, and the water pump is avoided from being in high-speed idling for a long time, thereby extending the service life of the high-pressure water pump.

[0024] In order to achieve the above second purpose, the utility model provides the following technical solutions:

[0025] A washing and sweeping vehicle comprises a vehicle body, a water spraying rod and any one of the above-mentioned water exhaust systems, wherein the water spraying rod is arranged downstream of a water pump of the water exhaust system.

[0026] The washing and sweeping vehicle provided by the utility model has the above-mentioned water exhaust system, and therefore has all the technical effects of the above-mentioned water exhaust system, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of a first state of a waterway exhaust system disclosed in an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of a second state of the waterway exhaust system disclosed in an embodiment of the utility model;

[0030] Figure 3 A schematic diagram of a third state of the waterway exhaust system disclosed in an embodiment of the utility model;

[0031] Figure 4 A schematic diagram of the first controller and the second controller being controlled separately according to an embodiment of the present utility model;

[0032] Figure 5 A schematic diagram of a pneumatic electromagnetic reversing valve disclosed in an embodiment of the utility model;

[0033] Figure 6 A schematic diagram of the structure of another state of the Unicom branch disclosed in an embodiment of the utility model;

[0034] in:

[0035] The first water tank 100, the second water tank 101, the connecting pipeline 200, the water inlet and outlet 201, the connecting branch 300, the water filter 301, the connecting branch 400, the filter 401, the water pump 500, the first controller 600, the second controller 700, and the pneumatic electromagnetic reversing valve 800. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making novel work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "top surface", "bottom surface" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] like Figure 1-Figure 6As shown, the water circuit exhaust system disclosed in the utility model includes a first water tank 100, a connecting pipeline 200, a connecting branch 300, a connecting branch 400, a water pump 500, a first controller 600 and a second controller 700, wherein the connecting pipeline 200 includes a water inlet and outlet 201, and the first water tank 100 is arranged above the water inlet and outlet 201, the first water tank 100 is connected to the connecting pipeline 200, the connecting branch 300 is a branch of the connecting pipeline 200, and the water pump 500 and the first controller 600 are arranged in the connecting branch 300, the first controller 600 is used to control the opening and closing of the connecting branch 300, the first end of the connecting branch 400 is connected to the first water tank 100, the second end of the connecting branch 400 is connected to the connecting branch 300, and the second controller 700 is arranged in the connecting branch 400 for controlling the opening and closing of the connecting branch 400. Specifically, the water exhaust system takes in and out water from a lower position of the connecting pipeline 200 , and the first water tank 100 , the water pump 500 , the first controller 600 and the second controller 700 are all located higher than the water inlet and outlet 201 in the vertical direction. The water circuit exhaust system provided by the utility model, when water needs to be added to the first water tank 100, the first controller 600 is closed and the second controller 700 is opened, water enters the connecting pipe 200 from the water inlet and outlet 201, and squeezes the air in the connecting pipe 200, the connecting branch 300 and the connecting branch 400 from bottom to top until it enters the first water tank 100 located above the water inlet and outlet 201. At this time, the air near the water pump 500 has entered the first water tank 100 from the connecting branch 400. After the water is added, the first controller 600 is opened and the second controller 700 is closed. There is water near the water pump 500, and the water pump 500 can be directly operated, avoiding the air from infiltrating into the water flow and entering the water pump 500, and the water pump 500 is in high-speed idling for a long time, thereby extending the service life of the high-pressure water pump 500.

[0039] In order to optimize the above technical solution, the first end of the Unicom branch 400 is arranged near the bottom of the first water tank 100, and the second end of the Unicom branch 400 is arranged upstream of the water pump 500. Specifically, the utility model preferably connects the first end of the Unicom branch 400 to the side wall of the first water tank 100, and the second end of the Unicom branch 400 is arranged near the water inlet end of the water pump 500. During use, initially there is air left inside the water circuit exhaust system. When water needs to be added to the inside of the first water tank 100, the first controller 600 is turned off and the second controller 700 is turned on. Water flows from bottom to top to the inside of the connecting pipe 200 and the upstream and downstream of the water pump 500. Because the first controller 600 is turned off, water will not flow out from the connecting branch 300. The air in the connecting branch 300 is squeezed to the connecting branch 400 and passes through the turned on second controller 700 to enter the inside of the first water tank 100. At this time, the exhaust work of each pipeline is completed. As the water level rises, the water in the first water tank 100 reaches the preset position, the water pump 500 is turned on, the first controller 600 is turned on, the second controller 700 is turned off, and the inside of each pipeline is filled with water. The water pump 500 can directly pump water out from the connecting branch 300. Because the second end of the connecting branch 400 is arranged downstream of the water pump 500, when exhausting, the air needs to flow to the water pump 500 first, and then be discharged through the connecting branch 300, there is a possibility of residual gas. Therefore, the utility model preferably arranges the second end of the connecting branch 400 upstream of the water pump 500 to protect the water pump 500 to the greatest extent, so as to achieve the purpose of extending the service life of the high-pressure water pump 500.

[0040] In order to optimize the above technical solution, the waterway exhaust system further includes a water filter 301, which is arranged between the water inlet and outlet 201 and the water pump 500, and the second end of the connecting branch 400 is connected to the highest position between the water filter 301 and the water pump 500. Specifically, the water filter 301 is used to filter impurities and the like in the water entering the water pump 500. Because the water approaches the water inlet end of the water pump 500 from bottom to top, the water filter 301 is arranged between the water inlet and outlet 201 and the water inlet end of the water pump 500, which can prevent impurities and the like from entering the water pump 500 during the water injection process, thereby protecting the water pump 500. Specifically, raising the second end of the connecting branch 400 in the vertical direction can facilitate the gas to be discharged from the connecting branch 300, thereby improving the exhaust efficiency of the waterway exhaust system.

[0041] In order to optimize the above technical solution, the waterway exhaust system further includes a second water tank 101, the bottom plate of the first water tank 100 is higher than the bottom plate of the second water tank 101 in the vertical direction, the first end of the communication pipeline 200 is connected to the bottom of the first water tank 100, and the second end of the communication pipeline 200 is connected to the bottom of the second water tank 101. Specifically, the position of the water inlet and outlet 201 in the vertical direction is lower than the position of the bottom plate of the second water tank 101, and the operator can arrange an extension pipeline on the communication pipeline 200, and the extension pipeline extends downward in the vertical direction, and its bottom end is connected to the water inlet and outlet 201 to improve the water injection efficiency.

[0042] In order to optimize the above technical solution, the first controller 600 is a middle-circuit controlled water valve, which is arranged downstream of the water pump 500. Specifically, the middle-circuit controlled water valve is arranged close to the water outlet of the water pump 500. When the communication branch 300 is filled with water, the middle-circuit controlled water valve is in a closed state, and the air in the pipeline upstream of the middle-circuit controlled water valve is squeezed to the communication branch 400, including the air at the water inlet and outlet of the water pump 500. Such an arrangement can ensure that the gas at the water pump 500 is exhausted, thereby improving the exhaust efficiency of the water exhaust system, further protecting the water pump 500, and extending the service life of the high-pressure water pump 500. It should be noted that the self-priming ability of the plunger-type high-pressure water pump 500 is very weak, and it takes a long time to exhaust the air blocked in front of the water inlet end of the high-pressure water pump 500. Therefore, the less air in the connecting branch 300, the longer the service life of the water pump 500. Therefore, preventing air from being sucked into the water pump 500 is the key point to protect the water pump 500. Expelling the gas in the connecting branch 300 by liquid squeezing has a good exhaust effect.

[0043] In order to optimize the above technical solution, the second controller 700 is an exhaust shut-off valve. Specifically, the second controller 700 and the first controller 600 can be controlled separately by the control system of the washing and sweeping vehicle. The utility model preferably arranges the exhaust shut-off valve near the side wall of the first water tank 100. The utility model preferably arranges the connecting branch 400 as a pipeline with a corner, and a section of the connecting branch 400 near the first water tank 100 is flush with the opening of the first water tank 100, because the overall trend of the connecting branch 400 is along the vertical direction. Under the premise that the connecting branch 400 has a corner, the vertical position of the first end of the connecting branch 400 is higher than the vertical position of the second end of the connecting branch 400, which can prevent the water pump 500 from outputting water. When the exhaust shut-off valve is in a closed state, the water above the corner of the connecting branch 400 and below the opening of the first water tank 100 stays in the pipeline above the exhaust shut-off valve, so that the water in the connecting branch 400 can also be completely discharged, thereby improving the utilization rate of water.

[0044] In order to optimize the above technical solution, the water exhaust system further includes a pneumatic electromagnetic reversing valve 800, wherein the A port of the pneumatic electromagnetic reversing valve 800 is connected to one of the first controller 600 and the second controller 700, and the B port of the pneumatic electromagnetic reversing valve 800 is connected to the other of the first controller 600 and the second controller 700. Specifically, the P port of the pneumatic electromagnetic reversing valve 800 is connected to a pressure gas source, which can be introduced from the chassis of the washing and sweeping vehicle or can be externally connected, and the pneumatic electromagnetic reversing valve 800 is used to switch the working state of the washing and sweeping vehicle.

[0045] Furthermore, the water circuit exhaust system includes three states. The first state is the state of parking and power off, and the state before water adding. At this time, the middle circuit control water valve is in a closed state, the exhaust shut-off valve is in a closed state, the pneumatic electromagnetic reversing valve 800 is not working, and air remains in the connecting pipeline 200, the connecting branch 300 and the connecting branch 400; the second state is the state of parking and power off, and water adding. At this time, the middle circuit control water valve is in a closed state, the exhaust shut-off valve is in an open state, the pneumatic electromagnetic reversing valve 800 is working, and during the water adding process, the air in the connecting pipeline 200, the connecting branch 300 and the connecting branch 400 is gradually discharged; the third state is the state of driving and power on, and the water circuit operation state. At this time, the middle circuit control water valve is in an open state, the exhaust shut-off valve is in a closed state, and water is discharged from the connecting branch 300.

[0046] When the water exhaust system switches from the first state to the second state, the pneumatic electromagnetic reversing valve 800 loses power, and the airflow of the pressure air source enters the A port of the pneumatic electromagnetic reversing valve 800 from the P port of the pneumatic electromagnetic reversing valve 800 to the exhaust shut-off valve, and the exhaust shut-off valve performs an opening action. At this time, the opening of the first water tank 100 is connected to the water inlet end of the water pump 500, and the B port of the pneumatic electromagnetic reversing valve 800 is connected to the atmosphere, so that the middle-circuit control water valve performs a closing action;

[0047] In the second state, water enters the water inlet and outlet 201, and the water enters the connecting pipe 200. As the water level rises to the connection point between the connecting branch 400 and the first water tank 100, the air in the connecting branch 300 where the water pump 500 is located is exhausted. When the water level rises to a preset position inside the first water tank 100 and the second water tank 101, the operator controls the water channel exhaust system to switch from the second state to the third state.

[0048] When the water exhaust system switches from the second state to the third state, the pneumatic electromagnetic reversing valve 800 is electrically reversed, and the airflow of the pressure air source enters the B port of the pneumatic electromagnetic reversing valve 800 from the P port of the pneumatic electromagnetic reversing valve 800 to the middle-way control water valve. The middle-way control water valve performs an opening action, and the A port of the pneumatic electromagnetic reversing valve 800 is connected to the atmosphere, so that the exhaust shut-off valve performs a closing action, and the water pump 500 rotates to work. The water in the first water tank 100 forms a high-pressure water flow through the water filter 301 and the water pump 500, and then passes through the middle-way control water valve to reach the water spray rod of the washing and sweeping vehicle. Closing the exhaust shut-off valve in this process can prevent the water pump 500 from directly absorbing water from the first water tank 100, thereby preventing the water pump 500 from inhaling air.

[0049] By using the pneumatic electromagnetic reversing valve 800 to control the mid-circuit water control valve and the exhaust shut-off valve, reverse interlocking of the execution action (one open and one closed) is achieved, thereby realizing the switching of the working state of the water exhaust system and the operating state of the washing and sweeping vehicle, realizing automatic exhaust, and being able to effectively prevent the water pump 500 from inhaling air and causing high temperature and cavitation problems, thereby extending the service life of the water pump 500.

[0050] In order to optimize the above technical solution, the water exhaust system further includes a filter 401, which is arranged between the first water tank 100 and the second controller 700. Specifically, the filter 401 is used to prevent impurities in the first water tank 100 from entering the communication branch 400, thereby preventing impurities from entering the exhaust shut-off valve and the water pump 500, further protecting the water pump 500. Because the high-pressure water pump 500 is a core component of the washing and sweeping vehicle, and its procurement cost and maintenance cost are high, the maintenance cost of the washing and sweeping vehicle can be reduced by arranging the filter 401 to protect the water pump 500, thereby improving the practicality and economy of the water exhaust system.

[0051] In order to optimize the above technical solution, the water circuit exhaust system also includes a liquid level sensor, which is arranged inside the Unicom branch 400. Specifically, the liquid level sensor is used to monitor the water level inside the Unicom branch 400. The utility model preferably arranges the liquid level sensor in the Unicom branch 400 near the first water tank 100, and it is arranged upstream of the electromagnetic shut-off valve. When in use, during the process of the water circuit exhaust system performing the exhaust operation, when the liquid level sensor detects that the internal liquid level of the Unicom branch 400 reaches the preset value, the gas on the side of the water inlet end of the Unicom branch 400 close to the water pump 500 has been discharged. If the liquid level sensor detects that the internal liquid level of the Unicom branch 400 is less than the preset value, the gas on the side of the water inlet end of the Unicom branch 400 close to the water pump 500 has not been completely discharged. The liquid level sensor can be used to monitor the water circuit exhaust system for unexpected situations such as water leakage in the pipeline and inability to add water, and stopping water addition when the gas is not discharged, which can improve the safety of the water circuit exhaust system.

[0052] The washing and sweeping vehicle disclosed in the utility model comprises a vehicle body, a water spraying rod and any of the above-mentioned water exhaust systems, wherein the water spraying rod is arranged downstream of a water pump 500 of the water exhaust system. Specifically, the water spraying rod is arranged downstream of a middle-circuit control water valve, and the high-pressure water flow formed by the high-pressure water pump 500 passes through the middle-circuit control water valve and the water spraying rod to complete the washing and sweeping work.

[0053] The washing and sweeping vehicle provided by the utility model has the above-mentioned water exhaust system, and therefore has all the technical effects of the above-mentioned water exhaust system, which will not be described in detail herein.

[0054] The advantages of the utility model are:

[0055] (1) Extend the service life of the water pump;

[0056] (2) The exhaust of pipelines is automatically controlled, and the exhaust efficiency is high;

[0057] (3) High security and strong practicality.

[0058] It should be noted that the waterway exhaust system and the washing and sweeping vehicle provided by the utility model can be used in the technical field of the waterway system of washing and sweeping vehicles or other fields. Other fields are any fields other than the technical field of the waterway system of washing and sweeping vehicles. The above is only an example and does not limit the application field of the waterway exhaust system and the washing and sweeping vehicle provided by the utility model.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A waterway exhaust system, characterized in that: It includes a first water tank, a connecting pipeline, a connecting branch, a connecting shunt, a water pump, a first controller and a second controller, wherein: The communication pipeline includes a water inlet and an outlet, and the first water tank is arranged above the water inlet and an outlet, and the first water tank is connected to the communication pipeline; The communication branch is a branch of the communication pipeline, and the water pump and the first controller are arranged on the communication branch, and the first controller is used to control the opening and closing of the communication branch; The first end of the communication branch is connected to the first water tank, and the second end of the communication branch is connected to the communication branch; The second controller is arranged on the communication branch and is used to control the opening and closing of the communication branch.

2. The waterway exhaust system according to claim 1, characterized in that: The first end of the communication branch is arranged close to the bottom of the first water tank, and the second end of the communication branch is arranged upstream of the water pump.

3. The waterway exhaust system according to claim 2, characterized in that: The waterway exhaust system further comprises a water filter, and the water filter is arranged between the water inlet and outlet and the water pump; The second end of the communication branch is connected to the highest position between the water filter and the water pump.

4. The waterway exhaust system according to claim 1, characterized in that: The water exhaust system also includes a second water tank, the bottom plate of the first water tank is higher than the bottom plate of the second water tank in the vertical direction, the first end of the connecting pipe is connected to the bottom of the first water tank, and the second end of the connecting pipe is connected to the bottom of the second water tank.

5. The water exhaust system according to claim 1, characterized in that: The first controller is a mid-route control water valve, and the mid-route control water valve is arranged downstream of the water pump.

6. The water exhaust system according to claim 5, characterized in that: The second controller is an exhaust shut-off valve.

7. The water exhaust system according to claim 6, characterized in that: The water exhaust system also includes a pneumatic electromagnetic reversing valve, wherein port A of the pneumatic electromagnetic reversing valve is connected to one of the first controller and the second controller, and port B of the pneumatic electromagnetic reversing valve is connected to the other of the first controller and the second controller.

8. The waterway exhaust system according to claim 1, characterized in that: The water exhaust system further includes a filter, and the filter is arranged between the first water tank and the second controller.

9. The waterway exhaust system according to any one of claims 1 to 8, characterized in that: The water channel exhaust system also includes a liquid level sensor, which is arranged inside the connecting branch.

10. A washing and sweeping vehicle, comprising a vehicle body, characterized in that: It comprises a water spray rod and a water exhaust system as described in any one of claims 1 to 9, wherein the water spray rod is arranged downstream of a water pump of the water exhaust system.

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