A power system for the superstructure of a dust suppression vehicle and its control method.

Abstract

This invention provides a superstructure power system and its control method for a dust suppression vehicle, comprising: a superstructure drive device; a power storage mechanism including a cavity and an elastic body disposed within the cavity and dividing the cavity into a power storage chamber and a storage chamber, the elastic body being used to store power after deformation; and a hydraulic drive device driven by the superstructure drive device, with its inlet end connected to a water tank and its outlet end connected to a water outlet mechanism, the water tank, and the storage chamber respectively via several valve pipes. The power storage mechanism or a circulating pressure relief circuit can reduce the water pressure on the components of the water outlet mechanism and the hydraulic drive device, thereby increasing their service life. Furthermore, the auxiliary pressurization of the power storage mechanism can directly increase the outlet pressure and stroke of the water outlet mechanism, temporarily improving the cleaning effect in special circumstances. This reduces fuel consumption and power loss caused by changes in the driving force of the superstructure drive device, improves the timeliness of pressurization of the water outlet mechanism, and shortens the pressurization waiting time.

Description

Technical Field

[0001] This invention relates to the field of superstructure power systems, specifically to a superstructure power system for dust suppression vehicles and its control method. Background Technology

[0002] Existing dust suppression vehicles have upper body operations including washing, sprinkling, and spraying. There are two main technical routes for driving the upper body operations: one is to use the upper body engine to drive the generator, and then use the high voltage electricity generated by the upper body engine to drive the fog cannon fan motor and water pump motor for upper body operations; the other is to use the upper body engine to drive the hydraulic pump, and then use the hydraulic power to drive the fog cannon fan motor and water pump motor for upper body operations.

[0003] However, existing superstructure power systems are prone to problems during superstructure operation when the superstructure engine starts. Rapid changes in engine speed cause sudden pressure changes in the system, which reduces the service life of various components. In particular, water pump motors, water valves, and nozzles used for road sprinkling are distributed along the waterway and are easily damaged by sudden pressure changes. This affects the effectiveness of flushing, sprinkling, and spraying operations. Furthermore, with a fixed superstructure engine speed, the superstructure's operating stroke is also fixed, making it difficult to adapt and increase the operating stroke for special situations such as stubborn garbage, longer-distance irrigation, or fallen leaves on higher branches. The only way to increase the superstructure engine speed is to increase the superstructure engine speed, but this will increase fuel consumption, increase power loss, and also increase the probability of component damage due to sudden pressure changes in the system.

[0004] The research objective of this invention is to design a power system and control method for the superstructure of a dust suppression vehicle, addressing the problems existing in the prior art. Summary of the Invention

[0005] This invention provides a superstructure power system and control method for dust suppression vehicles, which can effectively solve the above-mentioned problems.

[0006] This invention is implemented as follows:

[0007] A power system for the superstructure of a dust suppression vehicle and its control method thereof, comprising:

[0008] Upper drive unit;

[0009] A power storage mechanism includes a cavity and an elastic body disposed in the cavity and dividing the cavity into a power storage cavity and a storage cavity, wherein the elastic body is used to store power after deformation;

[0010] A hydraulically driven device, driven by the upper drive unit, has its inlet end connected to a water tank and its outlet end connected to a water outlet mechanism, the water tank, and the storage chamber via several valve pipes. By opening and closing the corresponding valve pipes, the hydraulically driven device pumps water into the storage chamber and stores pressure through the elastic body; alternatively, a circulating pressure relief loop is formed between the hydraulically driven device and the water tank, and / or the hydraulically driven device pumps water to the water outlet mechanism. When the water outlet mechanism requires pressurization, by opening and closing the corresponding valve pipes, the storage chamber releases stored water, and the stored water is pressurized to the water outlet mechanism through the storage pressure stored by the elastic body.

[0011] Furthermore, the number of cavities is provided and all are located inside the water tank. The valve pipes include tee pipes that are respectively connected to the water outlet of the hydraulic drive device, the water tank, and the storage cavities. The three ends of the tee pipes are controlled to open and close by tee valves. The tee pipes and the water tank are connected by a pressure relief pipeline. The pressure relief pipeline is provided with a pressure relief ball valve for controlling the size of the pressure relief pipeline passage. The tee pipes and the storage cavities are respectively provided with one-way valves for flowing water into the storage cavities. The storage cavities and the water inlet of the water outlet mechanism are also connected by a number of pressurization pipelines. The pressurization pipelines are respectively controlled to open and close by pressurization valves.

[0012] Furthermore, the energy storage chamber is connected to the outside. The elastic body includes a primary piston movably disposed within the chamber, a primary spring disposed within the energy storage chamber and connected to the primary piston, a secondary piston that seals and movably passes through the primary piston, and a secondary spring disposed within the storage chamber and connected to the primary and secondary pistons. The stiffness of the secondary spring is greater than that of the primary spring. When water enters the storage chamber, the primary piston first moves upward to compress the primary spring for primary energy storage. After primary energy storage is completed, the secondary piston then moves upward to compress the secondary spring for secondary energy storage.

[0013] Furthermore, the energy storage chamber and the storage chamber are distributed vertically, and the primary piston and the secondary piston are both movable vertically. The upper end of the energy storage chamber is connected to the outside through a connecting hole, and a float valve corresponding to the connecting hole is rotatably installed inside the energy storage chamber. The float valve is used to float up and block the connecting hole when the energy storage chamber leaks water.

[0014] Furthermore, it also includes a hydraulic system, and the valve pipes further include a number of water outlet pipes. Each of the water outlet pipes is equipped with a water outlet control valve. The water outlet mechanism includes a front duckbill, a side spray nozzle, a rear spray nozzle, a manual spray gun, and a mist cannon, which are respectively connected to the water outlet end of the hydraulic drive device through the number of water outlet pipes. The mist cannon is equipped with a fan driven by the hydraulic system.

[0015] Furthermore, the hydraulic system includes a main hydraulic pump and an auxiliary hydraulic pump connected to an oil source, a wind-driven device connecting the main hydraulic pump and the oil source, a rotary drive device and a lifting drive device connecting the auxiliary hydraulic pump and the oil source. The wind-driven device is used to drive the fan, the rotary drive device is used to drive the fog cannon to rotate, and the lifting drive device is used to drive the fog cannon to lift. The main hydraulic pump and the auxiliary hydraulic pump are driven by the upper drive device.

[0016] Furthermore, the main hydraulic pump is equipped with an electro-proportional valve for controlling the oil output of the main hydraulic pump. The hydraulic system also includes an overflow valve connecting the main hydraulic pump and the oil inlet of the power drive device to the oil source, a first solenoid valve for controlling the opening and closing of the auxiliary hydraulic pump, a second solenoid valve for controlling the opening and closing of the rotary drive device, and a third solenoid valve for controlling the opening and closing of the lifting drive device.

[0017] Furthermore, the upper drive device is an engine, the hydraulic drive device is a water pump, and the wind drive device is a fan. The main output shaft of the engine is sequentially connected to the input end of the water pump via a first clutch device, a gearbox, a coupling, and a drive wheel. The input end of the main hydraulic pump is sequentially connected to a second clutch device and a transmission wheel. The drive wheel and the transmission wheel are linked by a transmission belt.

[0018] Based on the control method for the superstructure power system of a dust suppression vehicle as described above, the control method is characterized in that:

[0019] S1, when the power unit of the upper structure is started, the water outlet mechanism does not discharge water and the storage chamber is empty, the hydraulic drive device pumps water into the storage chamber and stores energy through the elastic body by controlling the opening and closing of the corresponding valve pipe.

[0020] S2, after the accumulator has finished accumulating power, the corresponding valve pipe is opened and closed to form a circulating pressure relief circuit between the hydraulic drive device and the water tank.

[0021] S3, when the water outlet mechanism needs to discharge water to clean the road surface, the corresponding valve pipe is controlled to open and close, so that the hydraulic drive device pumps water to the water outlet mechanism to discharge water for road surface cleaning.

[0022] S4, during the road cleaning process, when the water outlet mechanism needs to be pressurized to increase the cleaning intensity, the corresponding valve pipe is controlled to open and close, so that the stored water is released from the storage chamber and the stored water is pressurized to the water outlet mechanism through the force of the elastic body.

[0023] The beneficial effects of this invention are:

[0024] 1. By adding several valves and a accumulator mechanism, when the upper-mount drive unit is first started and the water outlet mechanism does not discharge water, the opening and closing of several valves can be controlled to allow the hydraulic drive unit to pump water into the storage chamber and store it through an elastic body, or a circulating pressure relief loop can be formed between the hydraulic drive unit and the water tank. This reduces the water pressure on the components of the water outlet mechanism and the hydraulic drive unit during initial startup and sudden changes in driving force, extending their service life and improving the stability of subsequent water discharge for floor cleaning. After a period of operation, when the upper-mount drive unit stably drives the hydraulic drive unit to pump water and the water outlet mechanism stops discharging, the same method of storing water through the accumulator mechanism or releasing pressure through the circulating pressure relief loop can be used to maintain optimal driving force for the upper-mount drive unit without causing... The hydraulic drive unit and water outlet mechanism are damaged by pressure, and the stored water can be replenished after use to prepare for the next cleaning, thus improving the practicality of the stored water. On this basis, when the water outlet mechanism needs to be pressurized, the corresponding valve pipe is opened and closed, allowing the stored water in the storage chamber to be released and pressurized to the water outlet mechanism through the storage of the elastic body. Thus, in special situations such as stubborn garbage, watering at a slightly longer distance, or fallen leaves on high branches, the dust suppression vehicle can directly increase the water outlet pressure and stroke of the water outlet mechanism through the auxiliary pressurization of the stored water mechanism without increasing the driving force of the upper structure drive unit. This temporarily improves the cleaning effect for special situations, reduces the fuel consumption and power loss caused by changes in the driving force of the upper structure drive unit, and improves the timeliness of pressurization of the water outlet mechanism, shortening the pressurization waiting time.

[0025] 2. The design incorporates multiple chambers and one-way valves, enabling the accumulator mechanism to stably and synchronously accumulate water in several chambers during a single water storage cycle without backflow. Furthermore, the inclusion of multiple pressurization pipelines and valves allows for the release of stored water from individual chambers in special circumstances for thorough pressurization, achieving multiple pressurizations after a single storage cycle. This increases the number of times the accumulator mechanism can pressurize the water outlet after a single storage cycle, enhancing the pressurization frequency and improving the dust suppression vehicle's adaptability to special situations. Simultaneously, the pressure relief ball valve allows for pressure relief even during normal water discharge. The opening and closing degree controls the passage size of the pressure relief pipeline, that is, controls the flow rate of water drawn by the hydraulic drive device to the circulating pressure relief circuit, thereby controlling the flow rate of the water outlet mechanism, and thus controlling the water outlet effect of the water outlet mechanism. This allows for stepless adjustment of the water outlet quantity without changing the driving force of the upper drive device, reducing the probability of frequent changes in the driving force of the upper drive device causing large pressure changes in parts and a decrease in lifespan. Furthermore, when the water outlet mechanism is not discharging water, the upper drive device is working normally, and the accumulator mechanism is accumulating water, the water inlet of the water storage mechanism can also be adjusted through the pressure relief ball valve to control the stability of water storage.

[0026] 3. By using primary and secondary springs with different stiffnesses, the hydraulic drive device pumps water into the storage chamber. When water enters the storage chamber, the primary piston moves upward to compress the primary spring for primary energy storage. After primary energy storage is complete, the secondary piston moves upward to compress the secondary spring for secondary energy storage. The secondary spring is compressed by the secondary elastic element being pushed into the compression chamber, thus fully utilizing the space of the compression chamber. Furthermore, the energy storage mechanism stores water in stages. The primary energy storage stage requires less force for compression, providing a smooth energy storage start-up process and reducing pressure shocks and vibrations. After the primary spring is compressed to a certain degree, the secondary energy storage automatically activates. At this point, a greater force is needed... Larger forces are needed for further compression, but based on the first-stage energy storage, the second-stage energy storage can proceed stably. The first-stage spring can generate a large displacement under low pressure, storing more energy. Although the second-stage spring has a smaller displacement under high pressure, it can store a higher energy density, achieving efficient energy storage and improving the stability of the energy storage process, thus avoiding sudden changes in system pressure. On this basis, through the combined energy storage of the first and second-stage springs, the pressure increase during release is the superposition of the energy stored by the first and second-stage springs. This achieves a high-intensity release pressure increase effect based on stable energy storage under staged low pressure, ensuring the stability and effectiveness of the energy storage mechanism in energy storage, release, and pressure increase for the water outlet mechanism.

[0027] 4. Since the secondary piston component's sealing and sliding penetrates through the primary piston component, there is a certain risk of water leakage within the cavity. When water leaks from the storage cavity into the compression cavity and causes the float valve to rise and block the connecting hole, a signal is sent to the controller. The controller then activates the buzzer to sound an alarm, thereby notifying the staff to immediately shut down the upper drive device for maintenance, thus improving the safety of the power storage mechanism.

[0028] 5. By adding an electro-proportional valve, the driving force of the wind-powered drive device can be adjusted by controlling the oil output of the main hydraulic pump while keeping the driving force of the upper drive device constant. This allows for stepless adjustment of the fan speed without changing the driving force of the upper drive device, thereby reducing the probability of damage to system components caused by changes in the driving force of the upper drive device.

[0029] 6. By setting up a second clutch device, when the fan is not needed, the linkage between the main hydraulic pump and the upper drive device can be disconnected through the second clutch device, thereby reducing the loss and waste of driving force. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the power system for a dust suppression vehicle.

[0031] Figure 2 This is a schematic diagram of the energy storage mechanism.

[0032] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0033] Figure 4 This is a schematic diagram of the structure of an elastomer.

[0034] Figure 5 A schematic diagram of the structure when the elastic body stores force.

[0035] Figure 6 This is a schematic diagram of the upper drive unit.

[0036] Figure 7 This is a schematic diagram of the hydraulic system. Detailed Implementation

[0037] Reference Figure 1-7 As shown, a power system for the superstructure of a dust suppression vehicle and its control method thereof include:

[0038] Upper drive unit 1;

[0039] The energy storage mechanism 2 includes a cavity and an elastic body 23 disposed in the cavity and dividing the cavity into an energy storage cavity 21 and a storage cavity 22. The elastic body 23 is used to store energy after deformation.

[0040] The hydraulic drive device 3 is driven by the upper drive device 1, with its inlet end connected to the water tank 4 and its outlet end connected to the outlet mechanism 5, the water tank 4, and the storage chamber 22 respectively via several valve pipes 6. By opening and closing the corresponding valve pipes 6, the hydraulic drive device 3 pumps water to the storage chamber 22 and stores pressure through the elastic body 23; or, a circulating pressure relief loop is formed between the hydraulic drive device 3 and the water tank 4, and / or the hydraulic drive device 3 pumps water to the outlet mechanism 5. When the outlet mechanism 5 needs pressurization, the corresponding valve pipes 6 are opened and closed, causing the storage chamber 22 to release stored water and pressurizing the stored water to the outlet mechanism 5 through the storage of pressure by the elastic body 23. Specifically, the hydraulic drive device 3 is a water pump.

[0041] A control system is used to control the operation of various components.

[0042] The above structure, through the addition of several valve pipes 6 and a power storage mechanism 2, allows the hydraulic drive device 3 to pump water into the storage chamber 22 and store pressure through the elastic body 23 when the upper drive device 1 is first started and the water outlet mechanism 5 is not discharging water. Alternatively, a circulating pressure relief loop can be formed between the hydraulic drive device 3 and the water tank 4. This reduces the water pressure on the components of the water outlet mechanism 5 and the hydraulic drive device 3 when the upper drive device 1 is first started and the driving force changes abruptly, thereby increasing their service life and improving the stability of the subsequent water discharge from the water outlet mechanism 5 for cleaning the floor. After a period of operation, when the upper drive device 1 stably drives the hydraulic drive device 3 to pump water and the water outlet mechanism 5 is not discharging water, the power storage mechanism 2 can be used to store water or the circulating pressure relief loop can be used to release pressure, ensuring that the upper drive device 1 maintains optimal driving force while preventing water discharge. This can cause damage to components such as the hydraulic drive unit 3 and the water outlet mechanism 5 due to pressure. It can also replenish the water storage mechanism 2 after use, preparing it for the next cleaning operation and improving the practicality of the water storage mechanism 2. On this basis, when the water outlet mechanism 5 needs to be pressurized, the corresponding valve pipe 6 is opened and closed, causing the storage chamber 22 to release the stored water and pressurize the stored water to the water outlet mechanism 5 through the storage of the elastic body 23. Thus, in special situations such as stubborn garbage, watering at a slightly longer distance, or fallen leaves on high branches, the dust suppression vehicle can directly increase the water outlet pressure and stroke of the water outlet mechanism 5 through the auxiliary pressurization of the power storage mechanism 2 without increasing the driving force of the upper drive unit 1. This temporarily improves the cleaning effect for special situations, reduces the fuel consumption and power loss caused by changes in the driving force of the upper drive unit 1, and improves the timeliness of pressurization of the water outlet mechanism 5, shortening the pressurization waiting time.

[0043] To increase the pressurization frequency of the power storage mechanism 2, several cavities are provided, all located within the water tank 4. Several valve pipes 6 include three-way pipes 61 connecting the outlet of the hydraulic drive device 3, the water tank 4, and several storage cavities 22. The three ends of each three-way pipe 61 are controlled by a three-way valve. The three-way pipe 61 and the water tank 4 are connected via a pressure relief pipe 62. A pressure relief ball valve 621 is provided within the pressure relief pipe 62 to control the flow rate of the pressure relief pipe 62. One-way valves 63 are provided between each three-way pipe 61 and each of the storage cavities 22 to allow water to flow into the storage cavities 22. Several pressurization pipes 64 are also connected between the storage cavities 22 and the inlet of the water outlet mechanism 5. Each of the pressurization pipes 64 is controlled by a pressurization valve 641. Specifically, nine cavities are arranged in a rectangular array on one side of the water tank 4. The aforementioned structure, through the arrangement of several chambers and one-way valves 63, enables the accumulator mechanism 2 to achieve stable and synchronous accumulating of water in several chambers during a single water storage operation, without backflow. Furthermore, through the arrangement of several pressurizing pipelines 64 and pressurizing valves 641, in special circumstances, the stored water in a single chamber can be released for sufficient pressurization, thus achieving multiple pressurizations after a single storage operation. This increases the number of times the accumulator mechanism 2 can pressurize the water outlet mechanism 5 after a single storage operation, increasing the pressurization frequency of the accumulator mechanism 2 and improving the adaptability of the dust suppression vehicle to special situations. Simultaneously, the pressure relief ball valve 621 allows for pressure relief when the water outlet mechanism 5 is normally discharging water. The opening and closing degree of 21 controls the passage size of the pressure relief pipe 62, that is, controls the flow rate of water drawn by the hydraulic drive device 3 to the circulating pressure relief circuit, thereby controlling the flow rate of the water outlet mechanism 5, and thus controlling the water outlet effect of the water outlet mechanism 5. This allows for stepless adjustment of the water outlet volume of the water outlet mechanism 5 without changing the driving force of the upper drive device 1, reducing the probability of frequent changes in the driving force of the upper drive device 1 causing large pressure changes in parts and a decrease in lifespan. Furthermore, when the water outlet mechanism 5 is not discharging water, the upper drive device 1 is working normally, and the power storage mechanism 2 is storing water, the water inlet volume of the water storage mechanism can also be adjusted through the pressure relief ball valve 621 to control the stability of water storage.

[0044] To improve the energy storage effect, the energy storage chamber 21 is connected to the outside. The elastic body 23 includes a primary piston 231 movably disposed within the chamber, a primary spring 232 disposed within the energy storage chamber 21 and connected to the primary piston 231, a secondary piston 233 sealingly and movably penetrating the primary piston 231, and a secondary spring 234 disposed within the storage chamber 22 and connecting the primary piston 231 and the secondary piston 233. The stiffness of the secondary spring 234 is greater than that of the primary spring 232. The above structure, through the arrangement of a primary spring 232 and a secondary spring 234 with different stiffnesses, enables the hydraulic drive device 3 to pump water into the storage chamber 22. When water enters the storage chamber 22, the primary piston 231 first moves upward to compress the primary spring 232 for primary energy storage. After the primary energy storage is completed, the secondary piston 233 moves upward to compress the secondary spring 234 for secondary energy storage. The secondary spring 234 is compressed by the secondary elastic element being compressed into the compression chamber, thereby filling the space of the compression chamber. The system utilizes the combined force of the first-stage spring 232 and the second-stage spring 234 to achieve phased energy storage. The first-stage storage requires only a small force for compression, providing a smooth start-up process and reducing pressure shocks and vibrations. After the first-stage spring 232 is compressed to a certain extent, the second-stage storage automatically activates. At this stage, a larger force is required for further compression. However, based on the first-stage storage, the second-stage storage can proceed stably. The first-stage spring 232 can generate a large displacement under low pressure, storing more energy. Although the second-stage spring 234 has a smaller displacement under high pressure, it can store a higher energy density, achieving efficient energy storage and improving the stability of the storage process, thus avoiding sudden changes in system pressure. Furthermore, through the combined storage of the first-stage spring 232 and the second-stage spring 234, the release pressure is a superposition of the storage of the first-stage spring 232 and the second-stage spring 234. This achieves a high-intensity release pressure boost effect while maintaining stable storage under low pressure in stages, ensuring the stability and effectiveness of the energy storage mechanism 2 in supplying energy to the water outlet mechanism 5.

[0045] To improve safety, the accumulator chamber 21 and storage chamber 22 are vertically distributed. The primary piston 231 and secondary piston 233 are both vertically movable. The upper end of the accumulator chamber 21 is connected to the outside through a connecting hole 211. A float valve 212 corresponding to the connecting hole 211 is rotatably installed inside the accumulator chamber 21. The float valve 212 is used to float up and block the connecting hole 211 when the accumulator chamber 21 leaks water. Since the secondary piston 233 slides through the primary piston 231, there is a certain risk of water leakage within the chamber. When water leaks from the storage chamber 22 into the compression chamber and causes the float valve 212 to float up and block the connecting hole 211, a signal is sent to the controller. The controller then activates a buzzer alarm, thereby notifying personnel to immediately shut down the upper drive device 1 for maintenance, thus improving the safety of the accumulator mechanism 2.

[0046] Specifically, the water outlet mechanism 5 of the dust suppression vehicle needs to have not only water spraying and sprinkling functions, but also misting functions. Therefore, the upper power system also includes a hydraulic system 7, and the valve pipes 6 also include a number of water outlet pipes 65. Each water outlet pipe 65 is equipped with a water outlet control valve 651. The water outlet mechanism 5 includes a front duckbill 51, a side spray nozzle 52, a rear spray nozzle 53, a manual spray gun 54, and a mist cannon 55, which are respectively connected to the water outlet end of the hydraulic drive device 3 through the number of water outlet pipes 65. The mist cannon 55 is equipped with a fan driven by the hydraulic system 7. The above-mentioned structure allows the dust suppression vehicle to achieve various functional modes through the control of the opening and closing of the valve pipe 6 and the hydraulic system 7, such as front duckbill 51 for close-range road cleaning, side spray nozzle 52 for long-range road washing, rear spray nozzle 53 for road watering, handheld spray gun for road irrigation, mist cannon 55 for dust suppression by simultaneously discharging water and air, mist cannon 55 for road irrigation by discharging water only, and mist cannon 55 for blowing away dead leaves from trees by discharging air only. This greatly improves the multifunctionality of the dust suppression vehicle.

[0047] To improve the adaptability and practicality of the fog cannon 55, the hydraulic system 7 includes a main hydraulic pump 72 and an auxiliary hydraulic pump 73 connected to an oil source 71, a wind-driven device 74 connecting the main hydraulic pump 72 and the oil source 71, a rotary drive device 75 connecting the auxiliary hydraulic pump 73 and the oil source 71, and a lifting drive device 76. The wind-driven device 74 drives the fan, the rotary drive device 75 drives the fog cannon 55 to rotate, and the lifting drive device 76 drives the fog cannon 55 to rise and fall. The main hydraulic pump 72 and the auxiliary hydraulic pump 73 are driven by the upper drive device 1. Specifically, the rotary drive device 75 is a rotary motor, and the lifting drive device 76 is a lifting cylinder. Thus, through the arrangement of the rotary drive device 75 and the lifting drive device 76, the fog cannon 55 can rotate and rise and fall to adjust the working angle, greatly improving the adaptability and practicality of the fog cannon 55.

[0048] To achieve stepless adjustment of the fan speed, the main hydraulic pump 72 is equipped with an electro-proportional valve 721 for controlling the oil output of the main hydraulic pump 72. The hydraulic system 7 also includes an overflow valve 77 connecting the main hydraulic pump 72 and the oil inlet of the power drive device to the oil source 71, a first solenoid valve 731 for controlling the opening and closing of the auxiliary hydraulic pump 73, a second solenoid valve 751 for controlling the opening and closing of the rotary drive device 75, and a third solenoid valve 761 for controlling the opening and closing of the lifting drive device 76. This structure, through the addition of the electro-proportional valve 721, allows the driving force of the wind drive device 74 to be adjusted by controlling the oil output of the main hydraulic pump 72 while keeping the driving force of the upper drive device 1 constant. This directly achieves stepless adjustment of the fan speed without changing the driving force of the upper drive device 1, thereby reducing the probability of damage to system components caused by changes in the driving force of the upper drive device 1.

[0049] To reduce the loss of driving force in the upper structure drive unit 1, the upper structure drive unit 1 is configured as an engine, the hydraulic drive unit 3 as a water pump, and the wind drive unit 74 as a fan. The main output shaft of the engine is sequentially connected to the input end of the water pump via a first clutch device 11, a gearbox 12, a coupling 13, and a drive wheel. The input end of the main hydraulic pump 72 is sequentially connected to a second clutch device 14 and a transmission wheel. The drive wheel and the transmission wheel are linked by a transmission belt 15. Thus, the second clutch device 14 allows the main hydraulic pump 72 to be disconnected from the upper structure drive unit 1 when the fan is not needed, thereby reducing the loss and waste of driving force.

[0050] Based on the control method for the superstructure power system of a dust suppression vehicle as described above, the control method includes:

[0051] S1, when the power unit of the upper structure is started, the water outlet mechanism 5 does not discharge water and the storage chamber 22 is empty, the hydraulic drive device 3 pumps water to the storage chamber 22 and stores the power through the elastic body 23 by controlling the opening and closing of the corresponding valve pipe 6; specifically, the three-way valve connects the water pump outlet, water tank 4, and storage chamber 22, and the pressure relief ball valve 621 controls the flow rate of the water pump returning to the water tank 4 or even cuts it off;

[0052] S2, after the power storage mechanism 2 has completed power storage, the corresponding valve pipe 6 is opened and closed to form a circulating pressure relief circuit between the hydraulic drive device 3 and the water tank 4; specifically, the three-way valve disconnects the connection between the water pump and the storage chamber 22, and only connects the water pump outlet and the water tank 4.

[0053] S3, when the water outlet mechanism 5 needs to discharge water to clean the road surface, the hydraulic drive device 3 pumps water to the water outlet mechanism 5 to discharge water for road surface cleaning by controlling the opening and closing of the corresponding valve pipe 6; specifically, the three-way valve disconnects the connection between the water pump and the storage chamber 22, and only connects the water pump outlet end and the water tank 4, and the corresponding water outlet control valve 651 connects the corresponding water outlet pipe 65, so that the corresponding structure of the water outlet mechanism 5 discharges water. At the same time, the flow rate of the circulating pressure relief circuit is controlled by adjusting the opening and closing degree of the pressure relief ball valve 621, thereby controlling the water discharge flow rate of the water outlet mechanism 5.

[0054] S4. During the road cleaning process, when the water outlet mechanism 5 needs to be pressurized to increase the cleaning intensity, the corresponding valve pipe 6 is controlled to open and close, so that the storage chamber 22 releases the stored water and the stored water is pressurized to the water outlet mechanism 5 through the storage of the elastic body 23. Specifically, the pressure relief ball valve 621 is closed first to maximize the water output of the water outlet mechanism 5. If further pressurization is still needed, the stored water is released through the storage mechanism 2 to increase the pressure.

[0055] The above method can reduce the water pressure on each component of the water outlet mechanism 5 and the hydraulic drive device 3 through the power storage mechanism 2 or the circulating pressure relief circuit, thereby improving their service life. Furthermore, the auxiliary pressurization of the power storage mechanism 2 can directly increase the water outlet pressure and stroke of the water outlet mechanism 5, thereby temporarily improving the cleaning effect in special circumstances. This reduces the fuel consumption and power loss caused by changes in the driving force of the upper drive device 1, and improves the timeliness of pressurization of the water outlet mechanism 5, shortening the pressurization waiting time.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A power system for the superstructure of a dust suppression vehicle, characterized in that, include: Upper drive unit; A power storage mechanism includes a cavity and an elastic body disposed in the cavity and dividing the cavity into a power storage cavity and a storage cavity, wherein the elastic body is used to store power after deformation; A hydraulically driven device, driven by the upper-mounted drive unit, has its inlet end connected to a water tank and its outlet end connected to a water outlet mechanism, the water tank, and the storage chamber via several valve pipes. By opening and closing the corresponding valve pipes, the hydraulically driven device pumps water into the storage chamber and stores pressure through the elastic body; alternatively, a circulating pressure relief loop is formed between the hydraulically driven device and the water tank, and / or the hydraulically driven device pumps water to the water outlet mechanism. When the water outlet mechanism requires pressurization, by opening and closing the corresponding valve pipes, the storage chamber releases stored water, and the stored water is pressurized to the water outlet mechanism through the storage force stored by the elastic body. The cavity is provided in a plurality of parts, all of which are located inside the water tank. The plurality of valve pipes include a three-way pipe that is respectively connected to the water outlet of the hydraulic drive device, the water tank, and the plurality of storage cavities. The three ends of the three-way pipe are controlled to open and close by a three-way valve. The three-way pipe and the water tank are connected by a pressure relief pipeline. The pressure relief pipeline is provided with a pressure relief ball valve for controlling the size of the pressure relief pipeline passage. The three-way pipe and the plurality of storage cavities are respectively provided with a one-way valve for flowing water into the storage cavity. The plurality of storage cavities and the water inlet of the water outlet mechanism are also connected by a plurality of pressurization pipelines. The plurality of pressurization pipelines are respectively controlled to open and close by a pressurization valve. The energy storage chamber is connected to the outside. The elastic body includes a primary piston movably disposed within the chamber, a primary spring disposed within the energy storage chamber and connected to the primary piston, a secondary piston that seals and movably passes through the primary piston, and a secondary spring disposed within the storage chamber and connected to the primary and secondary pistons. The stiffness of the secondary spring is greater than that of the primary spring. When water enters the storage chamber, the primary piston first moves upward to compress the primary spring for primary energy storage. After primary energy storage is completed, the secondary piston then moves upward to compress the secondary spring for secondary energy storage. The energy storage chamber and the storage chamber are distributed vertically. The first-stage piston and the second-stage piston are both movable vertically. The upper end of the energy storage chamber is connected to the outside through a connecting hole. A float valve corresponding to the connecting hole is rotatably installed inside the energy storage chamber. The float valve is used to float up and block the connecting hole when the energy storage chamber leaks water.

2. The superstructure power system for a dust suppression vehicle as described in claim 1, characterized in that, It also includes a hydraulic system, and the valve pipes further include a number of water outlet pipes. Each of the water outlet pipes is equipped with a water outlet control valve. The water outlet mechanism includes a front duckbill, a side spray nozzle, a rear spray nozzle, a manual spray gun, and a mist cannon, which are respectively connected to the water outlet end of the hydraulic drive device through the number of water outlet pipes. The mist cannon is equipped with a fan driven by the hydraulic system.

3. The superstructure power system for a dust suppression vehicle as described in claim 2, characterized in that, The hydraulic system includes a main hydraulic pump and an auxiliary hydraulic pump connected to an oil source, a wind-driven device connecting the main hydraulic pump and the oil source, a rotary drive device and a lifting drive device connecting the auxiliary hydraulic pump and the oil source. The wind-driven device is used to drive the fan, the rotary drive device is used to drive the fog cannon to rotate, and the lifting drive device is used to drive the fog cannon to lift. The main hydraulic pump and the auxiliary hydraulic pump are driven by the upper drive device.

4. The superstructure power system for a dust suppression vehicle as described in claim 3, characterized in that, The main hydraulic pump is equipped with an electro-proportional valve for controlling the oil output of the main hydraulic pump. The hydraulic system also includes an overflow valve connecting the main hydraulic pump and the oil inlet of the power drive device to the oil source, a first solenoid valve for controlling the opening and closing of the auxiliary hydraulic pump, a second solenoid valve for controlling the opening and closing of the rotary drive device, and a third solenoid valve for controlling the opening and closing of the lifting drive device.

5. The superstructure power system for a dust suppression vehicle as described in claim 3, characterized in that, The upper drive device is an engine, the hydraulic drive device is a water pump, and the wind drive device is a fan. The main output shaft of the engine is sequentially connected to the input end of the water pump through a first clutch device, a gearbox, a coupling, and a drive wheel. The input end of the main hydraulic pump is sequentially connected to a second clutch device and a transmission wheel. The drive wheel and the transmission wheel are linked by a transmission belt.

6. A control method for the superstructure power system of a dust suppression vehicle according to any one of claims 1-5, characterized in that, The control method includes: S1, when the power unit of the upper structure is started, the water outlet mechanism does not discharge water and the storage chamber is empty, the hydraulic drive device pumps water into the storage chamber and stores energy through the elastic body by controlling the opening and closing of the corresponding valve pipe. S2, after the accumulator has finished accumulating power, the corresponding valve pipe is opened and closed to form a circulating pressure relief circuit between the hydraulic drive device and the water tank. S3, when the water outlet mechanism needs to discharge water to clean the road surface, the corresponding valve pipe is controlled to open and close, so that the hydraulic drive device pumps water to the water outlet mechanism to discharge water for road surface cleaning. S4, during the road cleaning process, when the water outlet mechanism needs to be pressurized to increase the cleaning intensity, the corresponding valve pipe is controlled to open and close, so that the stored water is released from the storage chamber and the stored water is pressurized to the water outlet mechanism through the force of the elastic body.

Images