CN115949635A - Hydraulic system, water supply and drainage vehicle and hydraulic system control method - Google Patents
Hydraulic system, water supply and drainage vehicle and hydraulic system control method Download PDFInfo
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- CN115949635A CN115949635A CN202211523356.4A CN202211523356A CN115949635A CN 115949635 A CN115949635 A CN 115949635A CN 202211523356 A CN202211523356 A CN 202211523356A CN 115949635 A CN115949635 A CN 115949635A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 212
- 239000003921 oil Substances 0.000 claims abstract description 196
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 description 7
- 230000014509 gene expression Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000004548 suspo-emulsion Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system, a water supply and drainage vehicle and a hydraulic system control method, wherein the hydraulic system comprises an oil tank; the first hydraulic water pump comprises a first hydraulic motor, the second hydraulic water pump comprises a second hydraulic motor, and the third hydraulic water pump comprises a third hydraulic motor; a plurality of hydraulic oil pumps, including first hydraulic oil pump and second hydraulic oil pump, the oil-out of first hydraulic oil pump is through the oil inlet of first hydraulic motor that first defeated oil pipe and first diverter valve are connected, and the oil inlet of second hydraulic motor is connected through defeated oil pipe of second and second diverter valve, the oil-out of second hydraulic oil pump passes through the oil inlet of defeated oil pipe of third and third diverter valve intercommunication first hydraulic motor, still communicate the oil inlet of third hydraulic motor through defeated oil pipe of fourth and fourth diverter valve, still communicate the oil inlet of second hydraulic motor through defeated oil pipe of fifth and fifth diverter valve. The first, second and third hydraulic motors may each obtain a corresponding input flow.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system, a water supply and drainage vehicle and a hydraulic system control method.
Background
The hydraulic system is a system which converts mechanical energy of power units such as an engine and a motor into pressure energy of liquid and is used for driving hydraulic actuators such as a hydraulic oil cylinder and a hydraulic motor to do work. In a hydraulic system, hydraulic oil is usually supplied to hydraulic actuators such as hydraulic cylinders and hydraulic motors through oil hoses.
Water supply and drainage vehicles are often used for water supply, drainage, flood control, and flood drainage, and are also used for irrigation in agriculture and urban landscaping. When the water supply and drainage vehicle is used, accumulated water, ditches, rivers and the like in the hollow parts are drained and emergency rescue operation is carried out through a drainage device on the water supply and drainage vehicle.
The existing water supply and drainage vehicle is provided with a hydraulic oil pump for conveying hydraulic oil and a plurality of hydraulic water pumps for draining water, the hydraulic water pumps supply the hydraulic water pumps with the hydraulic oil required by the operation of the hydraulic water pumps, and the power of the hydraulic water pumps is supplied by a hydraulic motor. The oil-out of hydraulic oil pump all is provided with the diverter valve on every defeated oil pipe through the oil inlet of a plurality of hydraulic water pump of defeated oil pipe intercommunication respectively, and hydraulic oil pump provides the required hydraulic oil of its operation for every hydraulic water pump alone like this, can make each hydraulic water pump obtain the input flow that corresponds, if hydraulic oil pump provides the required hydraulic oil of its operation for a plurality of hydraulic water pumps simultaneously, then open the diverter valve on every defeated oil pipe, but hydraulic oil has the uneven problem of distribution.
Disclosure of Invention
Therefore, it is necessary to provide a hydraulic system, a water supply and drainage vehicle, and a control method of the hydraulic system, so as to solve the problem that if a hydraulic oil pump simultaneously provides hydraulic oil required by the operation of a plurality of hydraulic motors, a switching valve on each oil delivery pipe is opened, but the distribution of the hydraulic oil is uneven.
To achieve the above object, the present embodiment provides a hydraulic system, including:
the oil tank is used for storing hydraulic oil;
the hydraulic control system comprises a plurality of hydraulic water pumps, a plurality of hydraulic control units and a control unit, wherein the hydraulic control units are connected with the hydraulic control units respectively, and each hydraulic control unit comprises a hydraulic motor, a first hydraulic pump, a second hydraulic pump and a third hydraulic pump;
the oil outlets of the first hydraulic oil pumps are connected with the oil inlet of the first hydraulic motor through a first oil conveying pipe and connected with the oil inlet of the second hydraulic motor through a second oil conveying pipe, and the oil outlet of the second hydraulic oil pump is communicated with the oil inlet of the first hydraulic motor through a third oil conveying pipe, is also communicated with the oil inlet of the third hydraulic motor through a fourth oil conveying pipe and is also communicated with the oil inlet of the second hydraulic motor through a fifth oil conveying pipe; and
and the switching valves comprise first switching valves, second switching valves, third switching valves, fourth switching valves and fifth switching valves, the first switching valves are arranged on the first oil conveying pipes, the second switching valves are arranged on the second oil conveying pipes, and the third switching valves are arranged on the third oil conveying pipes.
Furthermore, the hydraulic system also comprises a heat dissipation assembly used for dissipating heat of hydraulic oil in the hydraulic system.
Furthermore, hydraulic system is closed system, and the oil-out of first hydraulic motor, second hydraulic motor and third hydraulic motor all communicates through sixth defeated oil pipe first hydraulic oil pump with the oil return opening of second hydraulic oil pump, radiator unit includes the flushometer, the flushometer includes two entries and an export to selectively with two the lower party of pressure communicates to in the entry the export, the export communicates to the oil return opening of oil tank, two one of the entry is connected to first defeated oil pipe or second defeated oil pipe or on the third defeated oil pipe, the other party is connected to on the sixth defeated oil pipe.
Furthermore, the flushing valve comprises a shuttle valve and a pressure reducing valve, two inlets of the shuttle valve are two inlets of the flushing valve, an outlet of the pressure reducing valve is an outlet of the flushing valve, and an outlet of the shuttle valve is connected with an inlet of the pressure reducing valve.
Furthermore, the heat dissipation assembly further comprises a radiator, the outlet is communicated to an oil return opening of the oil tank through a seventh oil conveying pipe, and the radiator is arranged on the sixth oil conveying pipe or the seventh oil conveying pipe.
The first hydraulic oil pump and/or the second hydraulic oil pump are electric proportional load sensitive pumps, the first hydraulic oil pump and/or the second hydraulic oil pump are provided with load sensitive control signal oil ports, the load sensitive control signal oil ports are connected with an oil return port of the oil tank through the overflow valve, and the overflow valve is used for limiting the maximum power output of the first hydraulic oil pump and/or the second hydraulic oil pump.
Further, the output power of the first hydraulic motor is greater than that of the second hydraulic motor, the output power of the first hydraulic motor is greater than that of the third hydraulic motor, and the first hydraulic oil pump meets the output power of the hydraulic motors.
In order to achieve the above object, the present embodiment further provides a water supply and drainage vehicle, including:
a chassis;
the hydraulic system is arranged on the chassis and is the hydraulic system in any one of the embodiments.
Further, still include the water intaking robot of drain pipe and at least two, the drain pipe erects on the chassis, first hydraulic pump sets up on the water inlet of drain pipe, the first be provided with on the water intaking robot second hydraulic pump, the second be provided with on the water intaking robot third hydraulic pump.
In order to achieve the above object, this embodiment further provides a hydraulic system control method, where the control method is applied to the hydraulic system described in any one of the above embodiments, the hydraulic system further includes a processor, the processor is connected to the first hydraulic motor, the second hydraulic motor, the third hydraulic motor, the first switching valve, the second switching valve, the third switching valve, the fourth switching valve, and the fifth switching valve, and the processor includes a computer program, and when executed by the processor, the computer program implements the following steps:
the processor controls the first switching valve and/or the third switching valve to be opened, the first hydraulic oil pump and/or the second hydraulic oil pump provides hydraulic oil for the first hydraulic motor, and the first hydraulic water pump operates; or:
the processor controls the second switching valve to be opened, the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor, and the second hydraulic water pump operates; or:
the processor controls the opening of the fourth switching valve, the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor, and the third hydraulic water pump operates; or:
the processor controls the first switching valve, the fourth switching valve and the fifth switching valve to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic water pump, the first hydraulic motor operates, the second hydraulic oil pump provides hydraulic oil for the second hydraulic motor and the third hydraulic motor, and the second hydraulic water pump and the third hydraulic water pump operate.
Different from the prior art, for a first hydraulic motor, a second hydraulic motor and a third hydraulic motor with different output powers, corresponding working modes can be selected, wherein the first mode is that the first hydraulic motor works and needs large-flow high-speed output, a first switching valve and a third switching valve are selected to be both opened, and a first hydraulic oil pump and a second hydraulic oil pump simultaneously provide hydraulic oil for the first hydraulic motor; in the second mode, the second hydraulic motor or the third hydraulic motor works, if the second hydraulic motor works, the second switching valve is selected to be opened, and the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor; if the third hydraulic motor works, selecting a fourth switching valve to open, and providing hydraulic oil for the third hydraulic motor by a second hydraulic oil pump; in the third mode, the first hydraulic motor, the second hydraulic motor and the third hydraulic motor work simultaneously, the first switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic motor, the first hydraulic oil pump can meet the maximum power output of the first hydraulic motor at the moment, the fourth switching valve and the fifth switching valve are selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the second hydraulic motor and the third hydraulic motor; and in the fourth mode, the second hydraulic motor and the third hydraulic motor work simultaneously, the second switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor, the fourth switching valve is selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor. So let first hydraulic motor, second hydraulic motor and third hydraulic motor all can obtain the input flow that corresponds, reach better control effect, avoid the waste of the energy.
Drawings
FIG. 1 is a schematic structural diagram of an open hydraulic system in the present embodiment;
FIG. 2 is a schematic structural diagram of the hydraulic system in the present embodiment as a closed system;
FIG. 3 is a schematic structural view of the flush valve of this embodiment;
FIG. 4 is a schematic structural view of a part of the water supply and drainage vehicle in this embodiment;
fig. 5 is a schematic structural view of another part of the water supply and drainage vehicle in the embodiment.
Description of reference numerals:
1. an oil tank;
2. a hydraulic oil pump;
21. a first hydraulic oil pump; 22. a second hydraulic oil pump;
3. a hydraulic motor;
31. a first hydraulic motor; 32. a second hydraulic motor; 33. a third hydraulic motor;
4. a switching valve;
41. a first switching valve; 42. a second switching valve; 43. a third switching valve; 44. a fourth switching valve;
45. a fifth switching valve;
5. an oil delivery pipe;
51. a first oil delivery pipe; 52. a second oil delivery pipe; 53. a third oil delivery pipe; 54. a fourth oil delivery pipe;
55. a fifth oil delivery pipe; 56. a sixth oil delivery pipe; 57. a seventh oil delivery pipe;
6. a flush valve;
61. a shuttle valve; 62. a pressure reducing valve;
7. an oil replenishing pump;
8. a heat sink;
9. an overflow valve;
10. a water supply and drainage vehicle;
101. a chassis; 102. a drain pipe;
110. a filter;
120. a one-way valve;
130. a first hydraulic water pump.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".
In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.
As is understood in the "review guidelines," in this application, the terms "greater than," "less than," "more than," and the like are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and the analogous meaning of "plurality" is also to be understood, e.g., "plurality", etc., unless explicitly specified otherwise.
In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application are to be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains in accordance with specific situations.
Referring to fig. 1 to 5, a hydraulic system of the present embodiment includes:
an oil tank 1 for storing hydraulic oil;
a plurality of hydraulic water pumps including a first hydraulic water pump 130, a second hydraulic water pump and a third hydraulic water pump, the first hydraulic water pump 130 including a first hydraulic motor 31, the second hydraulic water pump including a second hydraulic motor 32, the third hydraulic water pump including a third hydraulic motor 33; the oil inlets of the first hydraulic oil pump 21 and the second hydraulic oil pump 22 are connected with the oil outlet of the oil tank 1, the oil outlet of the first hydraulic oil pump 21 is connected with the oil inlet of the first hydraulic motor 31 through a first oil conveying pipe 51 and is connected with the oil inlet of the second hydraulic motor 32 through a second oil conveying pipe 52, the oil outlet of the second hydraulic oil pump 22 is communicated with the oil inlet of the first hydraulic motor 31 through a third oil conveying pipe 53, the oil outlet of the second hydraulic oil pump 22 is communicated with the oil inlet of the third hydraulic motor 33 through a fourth oil conveying pipe 54, and the oil outlet of the second hydraulic oil pump 22 is communicated with the oil inlet of the second hydraulic motor 32 through a fifth oil conveying pipe 55; and
a plurality of switching valves 4 including a first switching valve 41, a second switching valve 42, a third switching valve 43, a fourth switching valve 44, and a fifth switching valve 45, the first switching valve 41 being disposed on the first oil line 51, the first switching valve 41 controlling opening or closing of the first oil line 51, the second switching valve 42 being disposed on the second oil line 52, the second switching valve 42 controlling opening or closing of the second oil line 52, the third switching valve 43 being disposed on the third oil line 53, the third switching valve 43 controlling opening or closing of the third oil line 53, the fourth switching valve 44 being disposed on the fourth oil line 54, the fourth switching valve 44 controlling opening or closing of the fourth oil line 54; the fifth switching valve 45 is provided on the fifth delivery pipe 55, and the fifth switching valve 45 controls opening or closing of the fifth delivery pipe 55.
The hydraulic system may be an open system or a closed system. If the hydraulic system is an open system, oil outlets of the first hydraulic motor 31, the second hydraulic motor 32 and the third hydraulic motor 33 are connected to an oil return port of the oil tank 1, and the structure is shown in fig. 1; if the hydraulic system is a closed system, the oil outlets of the first hydraulic motor 31, the second hydraulic motor 32 and the third hydraulic motor 33 are connected to the oil return ports of the first hydraulic oil pump 21 and the second hydraulic oil pump 22, and the structure is as shown in fig. 2. Wherein, since the second hydraulic motor 32 is supplied with the hydraulic oil from the first hydraulic oil pump 21, the hydraulic oil of the second hydraulic motor 32 flows back into the first hydraulic oil pump 21; since the third hydraulic motor 33 is supplied with hydraulic oil by the second hydraulic oil pump 22, hydraulic oil of the third hydraulic motor 332 is returned to the second hydraulic oil pump 22.
The water pump is a machine for conveying liquid or pressurizing liquid, and it can transfer the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, and is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal, etc. The power of the first hydraulic water pump 130, the second hydraulic water pump and the third hydraulic water pump is provided by the hydraulic motors of the hydraulic system, specifically, the power of the first hydraulic water pump 130 is provided by the first hydraulic motor 31 of the hydraulic system, the power of the second hydraulic water pump is provided by the second hydraulic motor 32 of the hydraulic system, the third hydraulic water pump is provided by the third hydraulic motor 33 of the hydraulic system, and the impellers of the first hydraulic water pump 130, the second hydraulic water pump and the third hydraulic water pump rotate rapidly under the driving of the hydraulic motors, so that the water pumping function is realized.
Different from the prior art, in the technical scheme, corresponding working modes can be selected for a first hydraulic motor, a second hydraulic motor and a third hydraulic motor with different output powers, the first mode is that the first hydraulic motor works and needs large-flow high-speed output, a first switching valve and a third switching valve are selected to be opened, and a first hydraulic oil pump and a second hydraulic oil pump simultaneously provide hydraulic oil for the first hydraulic motor; in the second mode, the second hydraulic motor or the third hydraulic motor works, if the second hydraulic motor works, the second switching valve is selected to be opened, and the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor; if the third hydraulic motor works, the fourth switching valve is selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor; in the third mode, the first hydraulic motor, the second hydraulic motor and the third hydraulic motor work simultaneously, the first switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic motor, the first hydraulic oil pump can meet the maximum power output of the first hydraulic motor at the moment, the fourth switching valve and the fifth switching valve are selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the second hydraulic motor and the third hydraulic motor; and in the fourth mode, the second hydraulic motor and the third hydraulic motor work simultaneously, the second switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor, the fourth switching valve is selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor. So let first hydraulic motor, second hydraulic motor and third hydraulic motor all can obtain the input flow that corresponds, reach better control effect, avoid the waste of the energy.
Preferably, the output power of the first hydraulic motor 31 is greater than the output power of the second hydraulic motor 32, the output power of the first hydraulic motor 31 is greater than the output power of the third hydraulic motor 33, and the output power of the second hydraulic motor 32 is equal to the output power of the third hydraulic motor 33. The first hydraulic motor 31 requires more hydraulic oil to maintain normal operation, and the second hydraulic motor 32 and the third hydraulic motor 33 require less hydraulic oil to maintain normal operation.
Referring to fig. 2, according to an embodiment of the present application, the hydraulic system is a closed system, and the oil outlets of the first hydraulic motor 31, the second hydraulic motor 32 and the third hydraulic motor 33 are communicated to the oil return ports of the first hydraulic oil pump 21 and the second hydraulic oil pump 22 through a sixth oil delivery pipe 56. The first oil delivery pipe 51, the second oil delivery pipe 52, the third oil delivery pipe 53, the fourth oil delivery pipe 54, and the fifth oil delivery pipe 55 belong to oil inlet pipes, and the sixth oil delivery pipe 56 and the seventh oil delivery pipe 57 belong to oil return pipes, with the hydraulic motor as a target object. The radiator module includes a flush valve 6, the flush valve 6 includes two inlets and an outlet, and selectively communicates the side with lower pressure of the two inlets to the outlet, which is communicated to the oil return port of the oil tank 1, specifically, the outlet is communicated to the oil return port of the oil tank 1 through a seventh oil delivery pipe 57, one of the two inlets is connected to the first oil delivery pipe 51 or the second oil delivery pipe 52 or the third oil delivery pipe 53, and the other is connected to the sixth oil delivery pipe 56.
Referring to fig. 2, taking an example that two inlets of the flushing valve 6 are respectively disposed on the second oil delivery pipe 52 and the sixth oil delivery pipe 56 (the second hydraulic motor 32 returns oil to the loop of the first hydraulic oil pump 21), the flushing valve 6 is provided with a preset pressure value, when the pressure value of the hydraulic oil in the second oil delivery pipe 52 is greater than the preset pressure value, it indicates that the oil pressure of the hydraulic oil in the second oil delivery pipe 52 is higher, the oil pressure of the hydraulic oil in the sixth oil delivery pipe 56 is lower, and the flushing valve 6 is automatically opened to drain the hydraulic oil in the sixth oil delivery pipe 56 to the oil tank 1.
Referring to fig. 2 and 3, according to an embodiment of the present application, the flush valve 6 includes a shuttle valve 61 and a pressure reducing valve 62, two inlets of the shuttle valve 61 are two inlets of the flush valve 6, an outlet of the pressure reducing valve 62 is an outlet of the flush valve 6, and an outlet of the shuttle valve 61 is connected to an inlet of the pressure reducing valve 62. The valve core of the shuttle valve 61 is pushed by the high-pressure side oil to move, so that the inlet of the low-pressure side is communicated with the inlet of the pressure reducing valve 62, and the hot oil of the low-pressure side returns to the oil tank 1 through the shuttle valve 61 and the pressure reducing valve 62, thereby completing the replacement of the hydraulic oil.
Referring to fig. 1 and 2, according to an embodiment of the present application, the heat dissipation assembly further includes a radiator 8, and the radiator 8 is disposed on the sixth oil delivery pipe 56 or the seventh oil delivery pipe 57 to dissipate heat of hydraulic oil.
According to an embodiment of the present application, the heat dissipation assembly further includes an oil replenishment pump 7, and the oil replenishment pump 7 is connected in series to the oil delivery pipe between the oil inlet of the first hydraulic oil pump 21 and the oil outlet of the oil tank 1, or connected in series to the oil delivery pipe between the oil inlet of the second hydraulic oil pump 22 and the oil outlet of the oil tank 1. The oil supply pump 7 is linked with the flushing valve 6, and when the flushing valve 6 drains the high-temperature hydraulic oil to the oil tank 1, the oil supply pump 7 also sends the low-temperature hydraulic oil to the first hydraulic oil pump 21 or/and the second hydraulic oil pump 22.
Referring to fig. 1, according to an embodiment of the present application, when the hydraulic system is an open system, the first hydraulic oil pump 21 and the second hydraulic oil pump 22 both use a load-sensitive variable displacement pump, the hydraulic system further includes an overflow valve 9, and the first hydraulic oil pump 21 and/or the second hydraulic oil pump 22 are/is provided with a load-sensitive control signal port. The load sensitive control signal oil port is connected with an oil return port of the oil tank 1 through an overflow valve 9, and the overflow valve 9 is used for limiting the maximum power output of the first hydraulic oil pump 21 and/or the second hydraulic oil pump 22. Because the engine power of the chassis 101 is limited, the secondary overflow valve 9 is externally connected to the first hydraulic oil pump 21 and/or the second hydraulic oil pump 22, and the maximum output pressure of the first hydraulic oil pump 21 and/or the second hydraulic oil pump 22 can be controlled, so that the maximum power output which can be provided by the engine of the chassis 101 is controlled under the condition that the output flow of the hydraulic oil pumps is kept in a stable range, and the engine which should output excessive power is prevented from being stopped.
Referring to fig. 2, according to an embodiment of the present disclosure, when the hydraulic system is a closed system, the first hydraulic oil pump 21 and the second hydraulic oil pump 22 may be a hydraulic-controlled proportional variable pump, an electric-controlled proportional variable pump, or a manual-controlled variable pump, and at this time, the first hydraulic oil pump 21 and the second hydraulic oil pump 22 are integrated with the overflow valve 9 and the oil replenishment pump 7.
According to an embodiment of the present application, the first switching valve 41, the second switching valve 42, the third switching valve 43, the fourth switching valve 44, and the fifth switching valve 45 may be electrically controlled switching valves. The first switching valve 41, the second switching valve 42, the third switching valve 43, the fourth switching valve 44, and the fifth switching valve 45 all belong to the switching valve 4, and are different only in the connected members. In some embodiments, the switching valve may be a pilot-controlled switching valve, a pneumatic-controlled switching valve, or a cartridge valve.
The first flow line 51, the second flow line 52, the third flow line 53, the fourth flow line 54, the fifth flow line 55, the sixth flow line 56, and the seventh flow line 57 all belong to the flow line 5, and are different only in the connected components.
The first hydraulic motor 31, the second hydraulic motor 32, and the third hydraulic motor 33 all belong to the hydraulic motor 3. While the present application is described with respect to the output of one hydraulic water pump being supplied by one or two hydraulic oil pumps at the same time, it will be appreciated by those skilled in the art that the output of one or more hydraulic water pumps may be supplied by three hydraulic oil pumps at the same time, or the output of one or more hydraulic water pumps may be supplied by four or even more hydraulic oil pumps at the same time, and is within the scope of the present application.
Referring to fig. 1, according to an embodiment of the present application, the hydraulic system further includes a check valve 120, and when the switching valve is turned off, the oil inlet and the oil outlet of the hydraulic motor of the check valve 120 are communicated, so as to prevent the hydraulic motor in the hydraulic water pump from being damaged due to suction. Specifically, with the first hydraulic motor 31 as a target object, a check valve 120 is connected in series between the first oil delivery pipe 51 and the sixth oil delivery pipe 56 connected to the oil outlet of the first hydraulic motor 31, and the check valve 120 allows the hydraulic oil flowing out from the oil outlet of the first hydraulic motor 31 to flow into the first oil delivery pipe 51 through the check valve 120; with the second hydraulic motor 32 as a target object, a check valve 120 is connected in series between the second oil delivery pipe 52 and the sixth oil delivery pipe 56 connected to the oil outlet of the second hydraulic motor 32, and the check valve 120 allows the hydraulic oil flowing out from the oil outlet of the second hydraulic motor 32 to flow into the second oil delivery pipe 52 through the check valve 120; to the third hydraulic motor 33, a check valve 120 is connected in series between the fourth delivery pipe 54 and the sixth delivery pipe 56 connected to the outlet port of the third hydraulic motor 33, and the check valve 120 allows the hydraulic oil flowing out from the outlet port of the third hydraulic motor 33 to flow into the fourth delivery pipe 54 through the check valve 120.
Referring to fig. 1, according to an embodiment of the present application, the hydraulic system further includes a filter 110, and the filter 110 is used for filtering impurities in the hydraulic oil. The filter 110 may be provided on the oil delivery pipe between the oil outlet of the oil tank 1 and the oil inlet of the first hydraulic oil pump 21, and the filter 110 may be provided on the sixth oil delivery pipe 56 at a portion close to the oil return port of the oil tank 1.
Referring to fig. 1 and fig. 2, the working principle of the hydraulic system is described, for example, the output power of the first hydraulic motor is greater than the output power of the second hydraulic motor, and the output power of the second hydraulic motor is equal to the output power of the third hydraulic motor, and a corresponding working mode can be selected:
the first mode is that the first hydraulic motor works and needs large-flow high-speed output, and if the first switching valve and the third switching valve are selected to be opened, the first hydraulic oil pump and the second hydraulic oil pump simultaneously provide hydraulic oil for the first hydraulic motor; if the first switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic motor; if the third switching valve is selected to be opened, the second hydraulic oil pump provides hydraulic oil for the first hydraulic motor;
in the second mode, the second hydraulic motor or the third hydraulic motor works, if the second hydraulic motor works, the second switching valve is selected to be opened, and the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor; if the third hydraulic motor works, the fourth switching valve is selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor;
in the third mode, the first hydraulic motor, the second hydraulic motor and the third hydraulic motor work simultaneously, the first switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic motor, the first hydraulic oil pump can meet the maximum power output of the first hydraulic motor at the moment, the fourth switching valve and the fifth switching valve are selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the second hydraulic motor and the third hydraulic motor;
and in the fourth mode, the second hydraulic motor and the third hydraulic motor work simultaneously, the second switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor, the fourth switching valve is selected to be opened, and the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor.
It should be noted that the rated power of the first hydraulic oil pump is greater than the rated power of the second hydraulic oil pump, the rated power of the first hydraulic motor is greater than the rated power of the third hydraulic motor, the rated power of the second hydraulic motor is equal to the rated power of the third hydraulic motor, the first hydraulic motor needs more hydraulic oil when keeping normal operation, the output power of the first hydraulic oil pump is greater, the first hydraulic motor can supply the hydraulic oil when working alone, and the second hydraulic oil pump can supply the hydraulic oil needed when the second hydraulic motor and the third hydraulic motor operate normally.
Referring to fig. 1 to 5, the present embodiment further provides a water supply and drainage vehicle, including a chassis 101 and a drainage device, wherein a hydraulic system is disposed on the chassis 101, the hydraulic system is the hydraulic system according to any one of the above embodiments, and the structure of the hydraulic system is as shown in fig. 1 to 3;
referring to fig. 4 and 5, according to an embodiment of the present application, the water supply and drainage vehicle further includes a drainage pipe 102, the drainage pipe 102 is mounted on the chassis, and a first hydraulic water pump 130 is disposed at a water inlet of the drainage pipe 102, and is used for pumping outside water into the drainage pipe 102 and spraying the outside water out of a water outlet of the drainage pipe 102. The second hydraulic water pump or the third hydraulic water pump is located on one side of the drain pipe 102 and used for executing drainage work, the second hydraulic water pump or the third hydraulic water pump can be a hand pump, and the second hydraulic water pump or the third hydraulic water pump can also be a hydraulic water pump arranged on the water taking robot or the water pipe. It should be noted that the structure of the drain pipe can be seen from the structure of the telescopic pipe in the patent with publication number CN 114294497A.
According to an embodiment of the present application, the water supply and drainage vehicle 10 further includes a water taking robot, and the water taking robot is provided with a second hydraulic water pump or a third hydraulic water pump. If one second hydraulic water pump and one third hydraulic water pump are arranged respectively, two water taking robots are arranged, the second hydraulic water pump is arranged on the first water taking robot, and the third hydraulic water pump is arranged on the second water taking robot; if second hydraulic pump and third hydraulic pump respectively have two, then the water intaking robot has four, all sets up a second hydraulic pump on first and the second water intaking robot, all sets up a third hydraulic pump on third and the fourth water intaking robot. For the structure of the water intake robot, reference may be made to patent nos. CN 21203845U or CN 113062393A.
It should be noted that fig. 4 and 5 are spliced together to form a complete water supply and drainage vehicle. When the water supply and drainage vehicle cannot adapt to complicated and variable geographic environments (such as marshland, soft river banks, silt lands, narrow streets, narrow roadways, underground passages and the like) due to factors such as overlarge body size, the water taking range is limited due to the complicated geographic environment, water cannot be taken around a far way or a place to supply water to a fire scene in time, or water cannot reach a water accumulation part to be drained, and the water taking robot can be used for draining water.
According to an embodiment of the present application, the water supply and drainage vehicle 10 may be, but not limited to, a drainage emergency vehicle, a mobile pump station, a master-slave drainage emergency vehicle, a water fetching vehicle, a pipe distribution vehicle, a downhole crawler vehicle, a tunnel mobile drainage device, or a carriage type drainage device.
According to an embodiment of the present application, the water supply and drainage vehicle 10 may be a gasoline vehicle, a diesel vehicle, a pure electric vehicle, or a hybrid vehicle or a range-extended vehicle. The chassis 101 includes a power source (e.g., an engine) that supplies power to the water supply and drainage vehicle 10, or is additionally provided with a driving device that supplies power to the water supply and drainage vehicle 10, and the power source is connected to wheels of the chassis 101 through a transmission mechanism so as to drive the water supply and drainage vehicle 10 to travel.
The present embodiment further provides a hydraulic system control method, where the control method is applied to the hydraulic system described in any one of the above embodiments, the hydraulic system further includes a processor, and the first hydraulic motor, the second hydraulic motor, the third hydraulic motor, the first switching valve, the second switching valve, the third switching valve, the fourth switching valve, and the fifth switching valve are all connected to the processor, where the processor includes a computer program, and when the computer program is executed by the processor, the following steps are implemented:
the first hydraulic motor works alone (as in the first mode), the processor controls the first switching valve 41 and/or the third switching valve 43 to open, the first hydraulic oil pump 21 and/or the second hydraulic oil pump 22 provides hydraulic oil for the first hydraulic motor, and the first hydraulic water pump 130 operates; specifically, the first hydraulic motor works and needs large-flow high-speed output, and if the first switching valve and the third switching valve are selected to be opened, the first hydraulic oil pump and the second hydraulic oil pump simultaneously provide hydraulic oil for the first hydraulic motor; if the first switching valve is selected to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic motor; if the third switching valve is selected to be opened, the second hydraulic oil pump provides hydraulic oil for the first hydraulic motor;
or:
the second hydraulic motor works alone (as an embodiment of the second mode), the processor controls the second switching valve 42 to open, the first hydraulic oil pump 21 provides hydraulic oil for the second hydraulic motor 32, and the second hydraulic pump operates;
or:
the third hydraulic motor works alone (as an embodiment of the second mode), the processor controls the fourth switching valve 44 to open, the second hydraulic oil pump 22 provides hydraulic oil for the third hydraulic motor, and the third hydraulic water pump operates;
or:
the first hydraulic motor, the second hydraulic motor and the third hydraulic motor operate simultaneously (as described in the third mode above), the processor controls the first switching valve 41, the fourth switching valve 44 and the fifth switching valve 45 to open, the first hydraulic oil pump 21 supplies hydraulic oil to the first hydraulic motor 31, the first hydraulic water pump 130 operates, the second hydraulic oil pump 22 supplies hydraulic oil to the second hydraulic motor 32 and the third hydraulic motor 33, and the second hydraulic water pump and the third hydraulic water pump operate.
Preferably, the rated power of the first hydraulic oil pump is greater than the rated power of the second hydraulic oil pump, the rated power of the first hydraulic motor is greater than the rated power of the third hydraulic motor, the rated power of the second hydraulic motor is equal to the rated power of the third hydraulic motor, the first hydraulic motor needs more hydraulic oil when keeping normal operation, the output power of the first hydraulic oil pump is greater, the first hydraulic oil pump can supply the hydraulic oil needed by the first hydraulic motor when working alone, and the second hydraulic oil pump can supply the hydraulic oil needed by the second hydraulic motor and the third hydraulic motor when working normally.
Preferably, the hydraulic system is used in a water drainage device such as a water supply and drainage vehicle, and in some embodiments, the hydraulic system can also be applied to other transportation devices, such as ships, aircrafts and the like.
According to one embodiment of the application, the processor is responsible for program flow management, and according to a program pre-programmed by a user, sequentially fetches instructions from the memory, places the instructions in the instruction register, determines what operation should be performed through instruction decoding (analysis), and then sends a micro-operation control signal to a corresponding component according to a determined time sequence through the operation controller. The computer program may be stored in a computer readable storage medium in the controller, the storage medium being an electronic component having a data storage function, including but not limited to: the computer-readable medium may also be a computer-readable medium, such as RAM, ROM, magnetic disk, magnetic tape, optical disk, flash memory, usb disk, removable hard disk, memory card, or memory stick.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by changing and modifying the embodiments described herein or by using the equivalent structures or equivalent processes of the content of the present specification and the attached drawings, and are included in the scope of the present invention.
Claims (10)
1. A hydraulic system, comprising:
the oil tank is used for storing hydraulic oil;
the hydraulic control system comprises a plurality of hydraulic water pumps, a plurality of hydraulic control units and a control unit, wherein the hydraulic control units are connected with the hydraulic control units respectively, and each hydraulic control unit comprises a hydraulic motor, a first hydraulic pump, a second hydraulic pump and a third hydraulic pump;
the oil outlets of the first hydraulic oil pumps are connected with the oil inlet of the first hydraulic motor through a first oil conveying pipe and connected with the oil inlet of the second hydraulic motor through a second oil conveying pipe, and the oil outlet of the second hydraulic oil pump is communicated with the oil inlet of the first hydraulic motor through a third oil conveying pipe, is also communicated with the oil inlet of the third hydraulic motor through a fourth oil conveying pipe and is also communicated with the oil inlet of the second hydraulic motor through a fifth oil conveying pipe; and
and the switching valves comprise first switching valves, second switching valves, third switching valves, fourth switching valves and fifth switching valves, the first switching valves are arranged on the first oil conveying pipes, the second switching valves are arranged on the second oil conveying pipes, and the third switching valves are arranged on the third oil conveying pipes.
2. The hydraulic system of claim 1, further comprising a heat sink assembly for dissipating heat from hydraulic oil in the hydraulic system.
3. The hydraulic system according to claim 2, wherein the hydraulic system is a closed system, oil outlets of the first hydraulic motor, the second hydraulic motor and the third hydraulic motor are all communicated with oil return ports of the first hydraulic oil pump and the second hydraulic oil pump through a sixth oil delivery pipe, the heat dissipation assembly comprises a flushing valve, the flushing valve comprises two inlets and an outlet, and selectively communicates the lower-pressure one of the two inlets with the outlet, the outlet is communicated with the oil return port of the oil tank, one of the two inlets is connected to the first oil delivery pipe or the second oil delivery pipe or the third oil delivery pipe, and the other inlet is connected to the sixth oil delivery pipe.
4. The hydraulic system as recited in claim 3 wherein the flush valve comprises a shuttle valve and a pressure relief valve, the two inlets of the shuttle valve being the two inlets of the flush valve, the outlet of the pressure relief valve being the outlet of the flush valve, the outlet of the shuttle valve being connected to the inlet of the pressure relief valve.
5. The hydraulic system of claim 3, wherein the heat dissipation assembly further comprises a radiator, the outlet is communicated to an oil return port of the oil tank through a seventh oil delivery pipe, and the radiator is disposed on the sixth oil delivery pipe or the seventh oil delivery pipe.
6. The hydraulic system according to claim 1, further comprising an overflow valve, wherein the first hydraulic oil pump and/or the second hydraulic oil pump are both electrically proportional load-sensitive pumps, the first hydraulic oil pump and/or the second hydraulic oil pump are provided with a load-sensitive control signal port, the load-sensitive control signal port is connected to an oil return port of the oil tank through the overflow valve, and the overflow valve is configured to limit maximum power output of the first hydraulic oil pump and/or the second hydraulic oil pump.
7. The hydraulic system according to any one of claims 1 to 6, wherein the output power of the first hydraulic motor is larger than the output power of the second hydraulic motor, the output power of the first hydraulic motor is larger than the output power of the third hydraulic motor, and the first hydraulic oil pump satisfies the output power of the hydraulic motors.
8. A water supply and drainage vehicle is characterized by comprising:
a chassis;
a hydraulic system provided on the chassis, the hydraulic system being a hydraulic system as claimed in any one of claims 1 to 9.
9. The water supply and drainage vehicle according to claim 8, further comprising a drain pipe and at least two water taking robots, wherein the drain pipe is erected on the chassis, the first hydraulic water pump is arranged at a water inlet of the drain pipe, the second hydraulic water pump is arranged on a first water taking robot, and the third hydraulic water pump is arranged on a second water taking robot.
10. A hydraulic system control method applied to a hydraulic system according to any one of claims 1 to 7, the hydraulic system further comprising a processor, the processor being connected to the first hydraulic motor, the second hydraulic motor, the third hydraulic motor, the first switching valve, the second switching valve, the third switching valve, the fourth switching valve, and the fifth switching valve, the processor comprising a computer program that, when executed by the processor, performs the steps of:
the processor controls the first switching valve and/or the third switching valve to be opened, the first hydraulic oil pump and/or the second hydraulic oil pump provides hydraulic oil for the first hydraulic motor, and the first hydraulic water pump operates; or:
the processor controls the second switching valve to be opened, the first hydraulic oil pump provides hydraulic oil for the second hydraulic motor, and the second hydraulic water pump operates; or:
the processor controls the opening of the fourth switching valve, the second hydraulic oil pump provides hydraulic oil for the third hydraulic motor, and the third hydraulic water pump operates; or:
the processor controls the first switching valve, the fourth switching valve and the fifth switching valve to be opened, the first hydraulic oil pump provides hydraulic oil for the first hydraulic water pump, the first hydraulic motor operates, the second hydraulic oil pump provides hydraulic oil for the second hydraulic motor and the third hydraulic motor, and the second hydraulic water pump and the third hydraulic water pump operate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211523356.4A CN115949635A (en) | 2022-11-30 | 2022-11-30 | Hydraulic system, water supply and drainage vehicle and hydraulic system control method |
| PCT/CN2023/111990 WO2024113948A1 (en) | 2022-11-30 | 2023-08-09 | Hydraulic system, water supply and drainage vehicle, and hydraulic system control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211523356.4A CN115949635A (en) | 2022-11-30 | 2022-11-30 | Hydraulic system, water supply and drainage vehicle and hydraulic system control method |
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| CN115949635A true CN115949635A (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211523356.4A Pending CN115949635A (en) | 2022-11-30 | 2022-11-30 | Hydraulic system, water supply and drainage vehicle and hydraulic system control method |
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| CN (1) | CN115949635A (en) |
| WO (1) | WO2024113948A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113948A1 (en) * | 2022-11-30 | 2024-06-06 | 福建侨龙应急装备股份有限公司 | Hydraulic system, water supply and drainage vehicle, and hydraulic system control method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10014045B4 (en) * | 2000-03-23 | 2005-05-25 | Uraca Pumpenfabrik Gmbh & Co Kg | Water Supply |
| CN101229902B (en) * | 2008-02-19 | 2010-07-21 | 湖南三一起重机械有限公司 | Hydraulic oil distribution controlling device for crane hydraulic system |
| CN201354482Y (en) * | 2009-01-22 | 2009-12-02 | 杭州海聚动力科技有限公司 | Dredging and cleaning system of sewer pipeline |
| CN109779987B (en) * | 2018-12-27 | 2020-07-31 | 长沙普罗科环境装备有限责任公司 | Road sweeper and hydraulic driving system thereof |
| CN111514491B (en) * | 2020-04-30 | 2022-10-21 | 福建侨龙应急装备股份有限公司 | Water supply vehicle |
| CN213270505U (en) * | 2020-09-18 | 2021-05-25 | 海汇新能源汽车有限公司 | Hydraulic device of electric sweeper |
| CN215171133U (en) * | 2021-04-09 | 2021-12-14 | 湖南三一路面机械有限公司 | Operating hydraulic control system and milling machine |
| CN115949635A (en) * | 2022-11-30 | 2023-04-11 | 福建侨龙应急装备股份有限公司 | Hydraulic system, water supply and drainage vehicle and hydraulic system control method |
| CN219220881U (en) * | 2022-11-30 | 2023-06-20 | 福建侨龙应急装备股份有限公司 | Hydraulic system and water supply and drainage vehicle |
| CN218913313U (en) * | 2022-11-30 | 2023-04-25 | 福建侨龙应急装备股份有限公司 | Hydraulic system and water supply and drainage vehicle |
-
2022
- 2022-11-30 CN CN202211523356.4A patent/CN115949635A/en active Pending
-
2023
- 2023-08-09 WO PCT/CN2023/111990 patent/WO2024113948A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113948A1 (en) * | 2022-11-30 | 2024-06-06 | 福建侨龙应急装备股份有限公司 | Hydraulic system, water supply and drainage vehicle, and hydraulic system control method |
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| WO2024113948A1 (en) | 2024-06-06 |
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