Double-pump series control system of cleaning vehicle

Abstract

The utility model relates to a double-pump series control system of a cleaning vehicle, and belongs to the technical field of cleaning equipment. The system comprises a water source, a water pipe, a first water pump, a second water pump, a first cleaning module, a second cleaning module and a pneumatic three-way valve. The first water pump and the second water pump are provided with water inlets and water outlets respectively, the water inlets are connected to a water source, and the water outlets are connected to a water pipe. The first cleaning module and the second cleaning module are connected to the two ends of the water pipe correspondingly. The pneumatic three-way valve is connected to the water pipe and located between a water outlet of the first water pump and a water outlet of the second water pump. The system further comprises a control panel in a cab, and the control panel is electrically connected with the pneumatic three-way valve. A pressure sensor is arranged on the water pipe; a pressure release valve is arranged in the system, when the pressure exceeds a threshold value, an independent mode is automatically switched back, and pipeline damage is avoided. The double pumps are connected in series for control, the cleaning pressure is flexibly adjusted, the cleaning efficiency is improved, meanwhile, the safety protection function is achieved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cleaning vehicle technology, and in particular to a dual-pump series control system for a cleaning vehicle. Background Technology

[0002] Currently, cleaning trucks are equipped with a dual water pump system: one low-pressure water pump is driven by the chassis power take-off, which is responsible for functions such as flushing and spraying at the rear of the vehicle; the other high-pressure water pump is driven by the auxiliary engine, which is responsible for functions such as rinsing and spraying at the front of the vehicle.

[0003] Chinese patent CN221414403U discloses a cleaning system and a cleaning vehicle. The pipeline assembly of this patent requires dynamic switching of the series mode of the water pumps, involving multiple valves, pipes and control components, which increases the complexity of the mechanical structure and may lead to increased installation, commissioning and maintenance costs. At the same time, the frequent switching is prone to component wear or leakage problems. Therefore, there is an urgent need for a dual-pump series control system for the cleaning vehicle, which not only has a simple mechanical structure and is easy to install, but also can quickly switch the series mode of the water pumps. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dual-pump series control system for a cleaning vehicle, which not only has a simple mechanical structure and is easy to install, but also allows for quick switching of the pump series mode.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a dual-pump series control system for a cleaning vehicle, including a water source, a water pipe, a first water pump, a second water pump, a first cleaning module, a second cleaning module, and a pneumatic three-way valve. The first water pump has a first inlet and a first outlet. The first outlet of the first water pump is connected to the water pipe, and the first inlet of the first water pump is connected to the water source. The second water pump has a second inlet and a second outlet. The second outlet of the second water pump is connected to the water pipe, and the second inlet of the second water pump is connected to the water source. The first cleaning module is connected to one end of the water pipe, and the second cleaning module is connected to the other end of the water pipe. The pneumatic three-way valve is connected to the water pipe and is located between the first outlet of the first water pump and the second outlet of the second water pump.

[0006] Furthermore, the dual-pump series control system of the cleaning truck also includes a cab, which is equipped with a control panel that is electrically connected to a pneumatic three-way valve.

[0007] Furthermore, a pressure sensor is installed on the water pipe.

[0008] Furthermore, the water pipes are equipped with pressure relief valves, which automatically switch back to independent mode when the pressure exceeds the threshold to prevent damage to the pipes.

[0009] Furthermore, the first and second water pumps are located on the same side.

[0010] The beneficial effects of this utility model are as follows: compared with the prior art, only one pneumatic three-way valve is needed to solve the switching between independent operation and series operation modes. It not only has a simple mechanical structure and is easy to install, but also allows for quick switching of water pump series operation modes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a dual-pump series control system for a cleaning vehicle according to a specific embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the electrical connection structure of the control panel.

[0013] Label Explanation

[0014] 1. Water pipe; 11. Pressure sensor; 12. Pressure relief valve;

[0015] 2. First water pump; 21. First water inlet; 22. First water outlet;

[0016] 3. Second water pump; 31. Second water inlet; 32. Second water outlet;

[0017] 4. First cleaning module;

[0018] 5. Second cleaning module;

[0019] 6. Pneumatic three-way valve;

[0020] 7. Control Panel. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figures 1 to 2 A dual-pump series control system for a cleaning vehicle includes a water source, a water pipe 1, a first water pump 2, a second water pump 3, a first cleaning module 4, a second cleaning module 5, and a pneumatic three-way valve 6.

[0023] The water source can be a water tank on the cleaning vehicle or an external water source interface to provide the water resources required for cleaning. The water source is connected to the first inlet 21 of the first water pump 2 and the second inlet 31 of the second water pump 3 through pipes, ensuring that both water pumps can draw water resources from the water source simultaneously.

[0024] The first water pump 2 is equipped with a first inlet 21 and a first outlet 22. The first inlet 21 of the first water pump 2 is connected to a water source, and the first outlet 22 is connected to a water pipe 1. The first water pump 2 can be a centrifugal water pump with a rated flow rate of 60-120 liters / minute, a rated pressure of 0.8-1.2 MPa, and a power of 5.5-7.5 kW. The first water pump 2 is made of corrosion-resistant materials, has good durability and stability, and can work continuously for a long time without failure.

[0025] The second water pump 3 is equipped with a second inlet 31 and a second outlet 32. The second inlet 31 of the second water pump 3 is connected to the water source, and the second outlet 32 ​​is connected to the water pipe 1. The specifications of the second water pump 3 are the same as or similar to those of the first water pump 2. It is also a centrifugal water pump with a rated flow rate of 60-120 liters / minute, a rated pressure of 0.8-1.2 MPa, and a power of 5.5-7.5 kW. The second water pump 3 is located on the same side as the first water pump 2 for easy maintenance and management.

[0026] Water pipe 1 is made of high-pressure wear-resistant material, with an inner diameter of 25-40mm and a wall thickness of 3-5mm, and can withstand a working pressure of 2.0-2.5MPa. Water pipe 1 is connected to the first outlet 22 of the first water pump 2, the second outlet 32 ​​of the second water pump 3, the first cleaning module 4, and the second cleaning module 5 to form a complete water circuit system.

[0027] A pneumatic three-way valve 6 is connected to water pipe 1, located between the first outlet 22 of the first water pump 2 and the second outlet 32 ​​of the second water pump 3. The pneumatic three-way valve 6 is made of stainless steel, with a diameter of 25-40mm, matching the inner diameter of water pipe 1. Its working pressure range is 0-2.5MPa, capable of withstanding the maximum working pressure of the system. The pneumatic three-way valve 6 has two working positions: a series position and an independent position. In the series position, the water output from the first water pump 2 enters the inlet of the second water pump 3 through the pneumatic three-way valve 6, forming a series working mode. In the independent position, the first water pump 2 and the second water pump 3 operate independently, providing water to the first cleaning module 4 and the second cleaning module 5, respectively.

[0028] The first cleaning module 4 is connected to one end of the water pipe 1 and is used to perform cleaning tasks. The first cleaning module 4 can be a high-pressure nozzle, a rotating cleaning arm, or other cleaning devices, and can be replaced according to different cleaning needs. The working pressure range of the first cleaning module 4 is 0.8-2.0 MPa, and the flow rate range is 60-120 liters / minute.

[0029] The second cleaning module 5 is connected to the other end of the water pipe 1 and is also used to perform cleaning tasks. The specifications of the second cleaning module 5 are the same as or similar to those of the first cleaning module 4, with a working pressure range of 0.8-2.0 MPa and a flow rate range of 60-120 liters / minute. The second cleaning module 5 can work simultaneously with the first cleaning module 4 or work independently, improving the flexibility and efficiency of the cleaning vehicle.

[0030] In the above embodiments, when the pneumatic three-way valve 6 is opened, the first water pump 2 and the second water pump 3 are connected in series, which can break through the pressure limit of a single pump and achieve pressure doubling (theoretical pressure superposition, actual efficiency ≥85%), significantly improving the cleaning efficiency of oil stains and hardened materials. When the pneumatic three-way valve 6 is closed, only a single pump needs to operate under normal working conditions (independent mode), reducing energy consumption and avoiding continuous high-power operation. Moreover, this series mode retains the original independent water circuit function and can be adapted to the standard interfaces of existing cleaning trucks such as spray guns and corner sprayers. Compared with the existing technology, only one pneumatic three-way valve 6 is needed to solve the switching between independent operation and series mode. It not only has a simple mechanical structure and is easy to install, but also allows for quick switching of water pump series mode.

[0031] As an optional implementation, the dual-pump series control system of the cleaning truck also includes a cab, in which a control panel 7 is provided, which is electrically connected to a pneumatic three-way valve 6.

[0032] In the above embodiments, the dual-pump series control system of the cleaning truck also includes a driver's cab, in which a control panel 7 is installed. The control panel 7 is electrically connected to the pneumatic three-way valve 6. The control panel 7 adopts a touch screen design and has a series mode button, an independent mode button, an emergency stop button, and a system status display area. The operator can control the switching of the pneumatic three-way valve 6 through the buttons on the control panel 7 to realize the conversion of the water pump operating mode. The control panel 7 and the pneumatic three-way valve 6 are connected by a waterproof connector and a shielded cable to ensure the stability and reliability of signal transmission.

[0033] As an optional implementation, a pressure sensor 11 is provided on the water pipe 1.

[0034] In the above embodiment, a pressure sensor 11 is installed on the water pipe 1 to monitor the water pressure inside the pipe 1 in real time. The pressure sensor 11 is made of stainless steel, with a measurement range of 0-3.0 MPa, an accuracy of ±0.5%, and a response time of less than 10 ms. The pressure sensor 11 is installed at key locations on the water pipe 1, such as the water pump outlet and the cleaning module inlet, and is connected to the control panel 7 via a cable to transmit pressure data to the control panel 7 for display in real time. Operators can adjust the operating status of the water pump based on the pressure data to ensure that the system operates in optimal condition.

[0035] As an optional implementation, the water pipe 1 is also equipped with a pressure relief valve 12, which automatically switches back to independent mode when the pressure exceeds the threshold to avoid damage to the pipeline.

[0036] In the above implementation, the system automatically switches back to independent mode when the pressure exceeds the threshold to prevent pipeline damage. The pressure relief valve 12 employs a spring-loaded structure with an adjustable opening pressure, typically set at 2.2-2.5 MPa. When the system pressure exceeds the set threshold, the pressure relief valve 12 automatically opens to release excess pressure, simultaneously triggering the pneumatic three-way valve 6 to switch to independent mode, allowing the two water pumps to operate independently, reducing system pressure and protecting water pipe 1 and other components from damage. The pressure relief valve 12's action time is less than 0.5 seconds, enabling rapid response to pressure changes and ensuring system safety.

[0037] As an optional implementation, the first water pump 2 and the second water pump 3 are located on the same side.

[0038] In the above embodiments, the first water pump 2 and the second water pump 3 are located on the same side, which facilitates maintenance and management.

[0039] In practical applications, the dual-pump series control system of the cleaning truck can select different working modes according to different cleaning needs. When a larger cleaning pressure is required, the pneumatic three-way valve 6 can be switched to the series position by using the series mode button on the control panel 7, so that the two water pumps work in series and increase the water pressure. When two cleaning tasks need to be performed simultaneously, the pneumatic three-way valve 6 can be switched to the independent position by using the independent mode button on the control panel 7, so that the two water pumps work independently and provide water to the first cleaning module 4 and the second cleaning module 5 respectively.

[0040] The working process of the dual-pump series control system of the cleaning truck is as follows: First, start the cleaning truck and turn on the water supply; then, select the working mode (series mode or independent mode) through the control panel 7; next, start the first water pump 2 and the second water pump 3; finally, operate the first cleaning module 4 and the second cleaning module 5 to perform the cleaning operation. During the cleaning process, the pressure sensor 11 monitors the water pressure in the water pipe 1 in real time. When the pressure exceeds the threshold, the pressure relief valve 12 automatically opens, and the system automatically switches to independent mode to protect system safety.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dual-pump series control system for a cleaning truck, characterized in that, The system includes a water source, water pipes, a first water pump, a second water pump, a first cleaning module, a second cleaning module, and a pneumatic three-way valve. The first water pump has a first inlet and a first outlet. The first outlet of the first water pump is connected to the water pipe, and the first inlet of the first water pump is connected to the water source. The second water pump has a second inlet and a second outlet. The second outlet of the second water pump is connected to the water pipe, and the second inlet of the second water pump is connected to the water source. The first cleaning module is connected to one end of the water pipe, and the second cleaning module is connected to the other end of the water pipe. The pneumatic three-way valve is connected to the water pipe and is located between the first outlet of the first water pump and the second outlet of the second water pump.

2. The dual-pump series control system for the cleaning vehicle according to claim 1, characterized in that, The dual-pump series control system of the cleaning truck also includes a cab, which is equipped with a control panel that is electrically connected to a pneumatic three-way valve.

3. The dual-pump series control system for the cleaning truck according to claim 1, characterized in that, A pressure sensor is installed on the water pipe.

4. The dual-pump series control system for the cleaning vehicle according to claim 1, characterized in that, The water pipes are also equipped with pressure relief valves, which automatically switch back to independent mode when the pressure exceeds the threshold to prevent damage to the pipes.

5. The dual-pump series control system for the cleaning vehicle according to claim 1, characterized in that, The first and second water pumps are located on the same side.

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