A dual-circuit hydraulic cooling system for a large-flow fully hydraulic drainage vehicle

Abstract

The present invention discloses a dual-channel hydraulic cooling system for a flow full-hydraulic drainage vehicle, which includes an air-cooling component, a water-cooling component, a hydraulic pump, a drainage motor, a hydraulic oil tank and a control module. The water-cooling component includes a water pump and a bypass cooling device; the inlet of the hydraulic pump is connected to the hydraulic oil tank, and the outlet of the hydraulic pump is connected to the inlet of the drainage motor; the outlet of the drainage motor is connected to the inlet of the water-cooling component; the outlet of the water-cooling component is connected to the inlet of the air-cooling component; the outlet of the air-cooling component is connected to the hydraulic oil tank; a temperature sensor is arranged between the air-cooling component and the hydraulic oil tank; the bypass cooling device is connected to the outlet of the water pump, and the flow direction of the hydraulic oil in the bypass cooling device is opposite to the water flow direction in the water outlet pipe of the water pump; the temperature sensor sends the hydraulic oil temperature signal to the control module. In the present invention, the water-cooling component cools the hydraulic oil by drawing water from the drainage pipe, enabling the hydraulic system to maintain working at around the optimal temperature for a long time.

Description

Technical Field

[0001] The present invention relates to the field of emergency drainage equipment, and particularly to a dual - circuit hydraulic cooling system for a large - flow fully hydraulic drainage vehicle. Background Art

[0002] Large - flow drainage emergency vehicles are currently powerful tools for urban waterlogging emergency rescue. Fully hydraulic drainage emergency vehicles are more favored by the market due to their high safety and strong drainage capacity. However, the existing large - flow hydraulic drainage vehicles have the problem of being unable to operate continuously for a long time. The main reason is that the heat dissipation of the hydraulic system is not smooth. Specifically, as a mobile emergency rescue equipment, the drainage vehicle generally works during the summer flood season. Its working environment temperature is high, there is no reliable circulating water source, and the heat dissipation power of the hydraulic system of the large - flow hydraulic drainage vehicle is extremely high. The existing drainage vehicles all use air - cooling methods to help the hydraulic system dissipate heat, and cannot effectively cool the hydraulic system for a long time. As a result, the system overheats and has to stop for cooling. Emergency drainage and waterlogging prevention is a long - term and continuous operation process, and stopping for cooling will seriously affect the effectiveness and reliability of drainage emergency rescue. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a dual - circuit hydraulic cooling system for a large - flow fully hydraulic drainage vehicle that can ensure effective cooling of the hydraulic system of the drainage vehicle, enabling it to drain water continuously for a long time.

[0004] Technical Solution: The dual - circuit hydraulic cooling system for a large - flow fully hydraulic drainage vehicle of the present invention includes an air - cooling component, a water - cooling component, a hydraulic pump, a drainage motor, a hydraulic oil tank, and a control module. The air - cooling component includes an air - cooled radiator, a bypass valve block, a temperature sensor, and a speed controller; the water - cooling component includes a water pump and a bypass cooling device.

[0005] The inlet of the hydraulic pump is connected to the hydraulic oil tank, and the outlet of the hydraulic pump is connected to the inlet of the drainage motor; the outlet of the drainage motor is connected to the inlet of the water - cooling component; the outlet of the water - cooling component is connected to the inlet of the air - cooling component; the outlet of the air - cooling component is connected to the hydraulic oil tank.

[0006] The bypass valve block is arranged between the outlet of the water - cooling component and the inlet of the air - cooling component, and the outlet of the bypass valve block is connected to the hydraulic oil tank.

[0007] A temperature sensor is arranged between the air - cooling component and the hydraulic oil tank, and a speed controller is installed on the air - cooled radiator to control the fan speed of the air - cooled radiator.

[0008] The bypass cooling device is connected to the outlet of the water pump, and the flow direction of the hydraulic oil in the bypass cooling device is opposite to the water flow direction in the water outlet pipe of the water pump.

[0009] The temperature sensor sends the hydraulic oil temperature signal to the control module.

[0010] Furthermore, the bypass cooling device includes a drainage pipe, a bypass water inlet pipe, an inner tank cooler, and a bypass water outlet pipe;

[0011] The drainage pipe is connected to the water outlet of the water pump;

[0012] The bypass water inlet pipe is arranged on the oil outlet side of the water-cooling component, and the bypass water outlet pipe is arranged on the oil inlet side of the water-cooling component;

[0013] The inner tank cooler is arranged between the bypass water inlet pipe and the bypass water outlet pipe. The oil inlet of the inner tank cooler is connected to the oil outlet of the drainage motor, and the oil outlet of the inner tank cooler is connected to the oil inlet of the air-cooling component.

[0014] Furthermore, the inner tank cooler includes a housing, an oil-passing inner tank, and fixing blocks; the oil-passing inner tank is arranged inside the housing and fixed to the housing by the fixing blocks;

[0015] The oil inlet of the oil-passing inner tank is connected to the oil outlet of the drainage motor; the oil outlet of the oil-passing inner tank is connected to the oil inlet of the air-cooling component; there is a gap between the outer surface of the oil-passing inner tank and the inner surface of the housing, and the gap forms a first annular channel, which is the first cold water channel;

[0016] The oil-passing inner tank is a ring-shaped structure with a cavity. A second annular channel is formed between the inner surface and the outer surface of the oil-passing inner tank, which is the hydraulic oil channel;

[0017] The inner surface of the oil-passing inner tank forms a third annular channel, which is the second cold water channel.

[0018] Furthermore, a water inlet control valve is arranged between the bypass water inlet pipe and the inner tank cooler.

[0019] Furthermore, the control module controls the working states of the air-cooling component and the water-cooling component according to the preset temperature value as follows:

[0020] When the hydraulic oil temperature exceeds temperature Q1, the temperature sensor sends a signal to the control module, and the control module controls the speed controller, and then controls the air-cooling radiator to work at speed N1. At this time, the air-cooling component starts to work, and the hydraulic oil temperature begins to enter a slow rising stage;

[0021] When the hydraulic oil temperature exceeds Q2, the temperature sensor sends a signal to the control module, and the control module controls the water inlet control valve to open. At this time, both the water-cooling component and the air-cooling component are in working states, and the hydraulic oil is cooled at full power;

[0022] When the system oil temperature drops below Q3, the temperature sensor sends a signal to the control module, which controls the speed controller and then controls the air-cooled radiator to adjust the fan speed to N2. At this time, the hydraulic system enters a dynamic thermal equilibrium state; the hydraulic oil temperature Q1 is the starting temperature of the cooling system, Q2 is the maximum allowable temperature of the system, and Q3 is the optimal operating temperature. Their magnitude relationship is:

[0023] Q2>Q3>Q1

[0024] The fan speed N1 is the maximum speed of the air-cooled radiator (101), and the fan speed N2 is the set speed for the system thermal equilibrium. Their magnitude relationship is:

[0025] N1>N2

[0026] The Q1, Q2, Q3, N1, and N2 are set according to the working conditions, oil type, or transmission medium.

[0027] Compared with the prior art, the remarkable effects of the present invention are as follows:

[0028] z 1. The bypass cooling device in the water-cooling component of the present invention adopts a structural design of three annular channels, enabling the high-temperature hydraulic oil to be between the two water-cooling annular channels and ensuring that the flow direction of the high-temperature hydraulic oil is opposite to the flow direction of the cooling water in the two water-cooling channels, ultimately ensuring efficient and rapid cooling of the hydraulic oil;

[0029] 2. The present invention connects the water-cooling component and the air-cooling component in series. The water-cooling component cools the hydraulic oil by introducing water from the drain pipe and combines different control temperatures and different fan speeds set by the control module to enable the hydraulic system of the large-flow drainage vehicle to finally reach a thermal equilibrium state, and at the same time keep the hydraulic system working at around the optimal temperature for a long time, solving the problem that the drainage vehicle stops due to the ineffective cooling of the hydraulic system, enabling it to drain water continuously for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the hydraulic cooling system diagram of the present invention;

[0031] Figure 2 is the bypass cooling device diagram of the present invention;

[0032] Figure 3 is the cross-sectional view of the inner tank type cooler of the present invention;

[0033] Figure 4 is the structural schematic diagram of the oil-passing inner tank of the present invention;

[0034] Illustration: t

[0035] 1. Air-cooling component; 2. Water-cooling component; 3. Hydraulic pump; 4. Drainage motor; 5. Hydraulic oil tank; 6. Control module; 7. Engine; 8. Power take-off; 101. Air-cooling radiator; 102. Bypass valve block; 103. Temperature sensor; 104. Fan controller; 201. Water pump; 202. Bypass cooling device; 203. Inlet control valve; 2021. Drainage pipe; 2022. Bypass inlet pipe; 2023. Inner-tank cooler; 2024. Bypass outlet pipe; 20231. Outer shell; 20232. Oil-passing inner tank; 20233. Fixed block. Detailed implementation mode

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings of the specification and the specific implementation mode.

[0037] As Figure 1 shown, the dual-circuit hydraulic cooling system of the large-flow full-hydraulic drainage vehicle of the present invention includes an air-cooling component 1, a water-cooling component 2, a hydraulic pump 3, a drainage motor 4, a hydraulic oil tank 5 and a control module 6. The air-cooling component 1 includes an air-cooling radiator 101, a bypass valve block 102, a temperature sensor 103, and a speed controller 104; the water-cooling component 2 includes a water pump 201 and a bypass cooling device 202.

[0038] The inlet of the hydraulic pump 3 is connected to the hydraulic oil tank 5, and the outlet of the hydraulic pump 3 is connected to the inlet of the drainage motor 4; the outlet of the drainage motor 4 is connected to the inlet of the water-cooling component 2; the outlet of the water-cooling component 2 is connected to the inlet of the air-cooling component 1; the outlet of the air-cooling component 1 is connected to the hydraulic oil tank 5.

[0039] A bypass valve block 102 is provided between the outlet of the water-cooling component 2 and the inlet of the air-cooling component 1, and the outlet of the bypass valve block 102 is connected to the hydraulic oil tank 5, which is used to protect the air-cooling radiator 101 when the oil return pressure is too high.

[0040] A temperature sensor 103 is provided between the air-cooling component 1 and the hydraulic oil tank 5. A speed controller 104 is installed on the air-cooling radiator 101 to control the fan speed of the air-cooling radiator 101.

[0041] As Figure 2 shown, the bypass cooling device 202 includes a drainage pipe 2021, a bypass inlet pipe 2022, an inner-tank cooler 2023, and a bypass outlet pipe 2024.

[0042] The drainage pipe 2021 is connected to the outlet of the water pump 201;

[0043] The bypass inlet pipe 2022 is on the same side as the outlet of the water-cooling component 2, and the bypass outlet pipe 2024 is on the same side as the inlet of the water-cooling component 2, so that the hot oil and the cold water flow in opposite directions.

[0044] AsFigure 3 As shown in the figure, the inner-tank cooler 2023 includes a housing 20231, an oil-passing inner tank 20232, and a fixing block 20233. The oil-passing inner tank 20232 is located inside the housing 20231, and the oil-passing inner tank 20232 is fixed to the housing 20231 by the fixing block 20233. The oil inlet of the oil-passing inner tank 20232 is connected to the oil outlet of the drainage motor; the oil outlet of the oil-passing inner tank 20232 is connected to the oil inlet of the air-cooling component 1. A gap is left between the outer surface of the oil-passing inner tank 20232 and the inner surface of the housing 20231 to form a first annular channel; and the oil-passing inner tank 20232 is a ring-shaped structure with a cavity, and a cavity is formed between the inner surface and the outer surface of the oil-passing inner tank 20232, which is the second annular channel; the inner surface of the oil-passing inner tank 20232 forms a third annular channel, as Figure 4 shown. Therefore, the hot oil of the system flows through the cavity (i.e., the second annular channel) of the oil-passing inner tank 20232, and the cold water flows through the gap (i.e., the first annular channel) between the oil-passing inner tank 20232 and the housing 20231 and the inner annular channel (i.e., the third annular channel) of the oil-passing inner tank 20232 to cool the hydraulic oil.

[0045] An inlet control valve 203 is provided on the bypass water inlet pipe 2022.

[0046] The working process of the drainage vehicle is as follows: start the engine 7, the engine 7 drives the power take-off 8 to work, the power take-off 8 drives the hydraulic pump 3 to act, and the hydraulic pump 3 drives the drainage motor 4 so that the water pump 201 starts the drainage operation.

[0047] The control method of the cooling system is implemented as follows:

[0048] S1. When the hydraulic oil temperature is relatively low during the initial drainage operation, both the inlet control valve 203 and the speed controller 104 are in the closed state, that is, both the water-cooling component 2 and the air-cooling component 1 are in the non-working state of being closed.

[0049] S2. When the hydraulic oil temperature exceeds the temperature Q1, the temperature sensor 103 sends a signal to the control module 6, and the control module 6 controls the speed controller 104 to further control the air-cooling radiator 101 to work at a speed N1. At this time, the air-cooling component 1 starts to work, and the system oil temperature begins to enter a slow rising stage.

[0050] S3. When the hydraulic oil temperature exceeds Q2, the temperature sensor 103 sends a signal to the control module 6, and the control module 6 controls the inlet control valve 203 to open it. At this time, both the water-cooling component 2 and the air-cooling component 1 are in the working state to cool the system at full power.

[0051] S4. When the system oil temperature drops below Q3, the temperature sensor 103 sends a signal to the control module 6. The control module 6 controls the speed controller 104 to further control the air-cooled radiator 101 to adjust the fan speed to N2. At this time, the hydraulic system enters a dynamic thermal equilibrium state.

[0052] The hydraulic oil temperature Q1 is the starting temperature of the cooling system, Q2 is the maximum allowable temperature of the system, and Q3 is the optimal working temperature. Their magnitude relationship is:

[0053] Q2>Q3>Q1

[0054] The fan speed N1 is the maximum speed of the air-cooled radiator 101, and the fan speed N2 is the set speed for the system thermal equilibrium. Their magnitude relationship is:

[0055] N1>N2

[0056] Q1, Q2, Q3, N1, and N2 can be specifically set according to the specific working conditions, different types of oil, and different transmission media.

[0057] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dual-circuit hydraulic cooling system for a high-flow, fully hydraulic drainage vehicle, characterized by: It comprises an air cooling component (1), a water cooling component (2), a hydraulic pump (3), a drainage motor (4), a hydraulic oil tank (5) and a control module (6); the water cooling component (2) comprises a water pump (201) and a bypass cooling device (202); The oil inlet of the hydraulic pump (3) is connected to the hydraulic oil tank (5); the oil outlet of the hydraulic pump (3) is connected to the oil inlet of the drainage motor (4); the oil outlet of the drainage motor (4) is connected to the oil inlet of the water cooling component (2); the oil outlet of the water cooling component (2) is connected to the oil inlet of the air cooling component (1); the oil outlet of the air cooling component (1) is connected to the hydraulic oil tank (5); The oil outlet of the air cooling component (1) is connected to the hydraulic oil tank (5), a control valve is provided between the oil inlet of the air cooling component (1) and the oil outlet of the water cooling component (2), and the oil outlet of the control valve is connected to the hydraulic oil tank; The bypass cooling device (202) is connected to the water outlet of the water pump (201), and the flow direction of the hydraulic oil in the bypass cooling device (202) is opposite to the flow direction of the water in the water outlet pipe of the water pump (201); The temperature sensor (103) sends a hydraulic oil temperature signal to the control module (6); The bypass cooling device (202) comprises a drainage pipe (2021), a bypass water inlet pipe (222), an inner tank cooler (2023), and a bypass water outlet pipe (2024); The drainage pipe (2021) is connected to the water outlet of the water pump (201); The bypass water inlet pipe (2022) is provided on the oil outlet side of the water cooling component (2), and the bypass water outlet pipe (2024) is provided on the oil inlet side of the water cooling component (2); The inner liner cooler (2023) is arranged between the bypass water inlet pipe (2022) and the bypass water outlet pipe (2024), the oil inlet of the inner liner cooler (2023) is connected to the oil outlet of the drainage motor (4), and the oil outlet of the inner liner cooler (2023) is connected to the oil inlet of the air cooling component (1); The liner-type cooler (2023) comprises an outer shell (20231), an oil-passing inner shell (20232), and a fixing block (20233); the oil-passing inner shell (20232) is arranged inside the outer shell (20231) and fixed to the outer shell (20231) via the fixing block (20233); The oil inlet of the oil-passing inner tank (20232) is connected to the oil outlet of the drainage motor (4); the oil outlet of the oil-passing inner tank (20232) is connected to the oil inlet of the air-cooling component (1); a gap is provided between the outer surface of the oil-passing inner tank (20232) and the inner surface of the outer shell (20231), and the gap forms a first annular channel, and the first annular channel is a first cold water channel; The oil-passing inner liner (20232) is an annular structure with a cavity, and a second annular channel is formed between the inner surface of the oil-passing inner liner (20232) and the outer surface of the oil-passing inner liner (20232), which is a hydraulic oil channel; A third annular channel is formed on the inner surface of the oil-passing liner (20232), which serves as the second cold water channel.

2. The dual-circuit hydraulic cooling system for high-flow full-hydraulic drainage vehicles according to claim 1 is characterized in that: The air-cooling assembly (1) comprises an air-cooling radiator (101), a bypass valve block (102), a temperature sensor (103), and a speed controller (104); The bypass valve block (102) is provided between the oil outlet of the water cooling component (2) and the oil inlet of the air cooling component (1), and the oil outlet of the bypass valve block (102) is connected to the hydraulic oil tank (5); A temperature sensor (103) is provided between the air-cooling assembly (1) and the hydraulic oil tank (5), and a speed controller (104) is provided on the air-cooling radiator (101) for controlling the fan speed of the air-cooling radiator (101).

3. The dual-circuit hydraulic cooling system for high-flow full-hydraulic drainage vehicles according to claim 1 is characterized in that: A water inlet control valve (203) is provided between the bypass water inlet pipe (2022) and the liner-type cooler (2023).

4. The dual-circuit hydraulic cooling system for high-flow, fully hydraulic drainage vehicles according to any one of claims 1 to 3, characterized in that: The control module (6) controls the working states of the air cooling component (1) and the water cooling component (2) according to a preset temperature value: When the hydraulic oil temperature exceeds the cooling system starting temperature Q1, the temperature sensor (103) sends a signal to the control module (6), and the control module (6) controls the speed controller (104), thereby controlling the air-cooled radiator (101) to operate at a speed N1. At this time, the air-cooled component (1) starts to work, and the hydraulic oil temperature begins to enter a slow rising stage; When the hydraulic oil temperature exceeds the maximum temperature Q2 allowed by the system, the temperature sensor (103) sends a signal to the control module (6), and the control module (6) controls the water inlet control valve (203) to open. At this time, the water cooling component (2) and the air cooling component (1) are both in working state, and the hydraulic oil is cooled at full power; When the system oil temperature drops below the optimal operating temperature Q3, the temperature sensor (103) sends a signal to the control module (6), and the control module (6) controls the speed controller (104), which in turn controls the air-cooled radiator (101) to adjust the fan speed to N2. At this time, the hydraulic system enters a dynamic thermal equilibrium state. The relationship between the cooling system starting temperature Q1, the system maximum allowable temperature Q2, and the optimal operating temperature Q3 is: Q2>Q3>Q1 The fan speed N1 is the maximum speed of the air-cooled radiator (101), and the fan speed N2 is the system thermal balance setting speed, and the relationship between them is: N1>N2 The Q1, Q2, Q3, N1, and N2 are set according to the working conditions, oil type, or transmission medium.

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