Hydraulic system and device and crane

Abstract

The invention discloses a hydraulic system, a hydraulic device and a crane. The hydraulic system comprises a plurality of action modules, a power module and a control module, each action module comprises an action part and a functional valve part; the plurality of action modules are respectively a main roll module, an auxiliary roll module, a variable amplitude module and a telescopic module; the power module comprises a first power part and a second power part, and when the control module is in different preset states, the power module provides power for different action modules; according to the hydraulic system, the hydraulic device and the crane, all links of a multi-way valve, a balance valve and an auxiliary valve are respectively integrated on a winch motor, a variable-amplitude oil cylinder and a telescopic oil cylinder; high pressure is maintained in front of the main coil pile-up valve motor, the auxiliary coil pile-up valve motor, the integrated variable-amplitude oil cylinder and the integrated telescopic oil cylinder, and the response time of pipeline pressure building is shortened, so that the responsiveness of whole machine operation is improved, meanwhile, use of hard pipes, hoses and pipeline connectors is reduced, and oil leakage risk points are reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, in particular to a hydraulic system, device and crane. BACKGROUND

[0002] With the continuous iteration of crane products, the performance is gradually improved, and customers have higher requirements for the control accuracy of crane hoisting operation and the reliability and durability of the product itself. When the existing crane product actuator in the market moves, the pressure oil source is provided by the hydraulic pump, the outlet pipeline passes through the multi-way valve, and then is distributed to different actuators. In this process, due to the long pipeline, the pressure oil source is connected to the actuator after reversing through the multi-way valve, and the pipeline needs to respond during pressure building, and then reaches the actuator combined with the response time of the actuator, which causes delay in product operation control. And there are many pipelines, after a period of use, the existing products on the market often have the phenomenon of loose joints and oil leakage. SUMMARY

[0003] The purpose of the application is to provide a hydraulic system, device and crane, to solve the problems of slow response of the upper actuator, many oil leakage points caused by the pipeline joints and many pipelines, avoid the increase of response time caused by using integrated multi-way valve to distribute pressure oil source, reduce the risk of oil leakage by reducing the pipeline connection, adjust the high-pressure oil source from the multi-way valve end to the actuator end, and reduce the response time from the control signal to the actuator.

[0004] To achieve the above purpose, the application adopts the following technical scheme: In a first aspect, a hydraulic system is provided, comprising a plurality of action modules, a power module for providing a pressure oil source for the plurality of action modules, and a control module for controlling the power module; The plurality of action modules each includes an action part and a function valve part, and the power module inputs the pressure oil source into the action part through the function valve part, so that the action part completes the predetermined action; The plurality of action modules are respectively a main winding module, a secondary winding module, an amplitude changing module and a telescopic module; The power module includes a first power part and a second power part, when the control module is in a first preset state, the first power part provides a pressure oil source for the main winding module and the secondary winding module, and the second power part provides a pressure oil source for the amplitude changing module and the telescopic module, when the control module is in a second preset state, the first power part and the second power part simultaneously provide a pressure oil source for the same action module.

[0005] In some possible embodiments, the power part of the main volume module comprises a main volume motor and a main volume integrated valve motor, and the function valve part comprises a main volume multi-way valve, a main pilot proportional valve assembly, a main volume balance valve, a second overflow valve, a second flow divider valve and a second anti-shock valve integrated on the main volume integrated valve motor. The main pilot proportional valve assembly comprises a first main pilot proportional pressure reducing valve and a second main pilot proportional pressure reducing valve.

[0006] In further embodiments, the power part of the auxiliary volume module comprises an auxiliary volume motor and an auxiliary volume integrated valve motor, and the function valve part comprises an auxiliary volume multi-way valve, an auxiliary pilot proportional valve assembly and an auxiliary volume balance valve integrated on the auxiliary volume integrated valve motor. The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve and a second auxiliary pilot proportional pressure reducing valve.

[0007] In further embodiments, the power part of the telescopic module comprises a telescopic cylinder and a telescopic integrated valve, and the function valve part comprises a telescopic multi-way valve, a telescopic pilot proportional pressure reducing assembly and a telescopic balance valve integrated on the telescopic integrated valve. The telescopic pilot proportional pressure reducing assembly comprises a first telescopic pilot proportional pressure reducing valve and a second telescopic pilot proportional pressure reducing valve.

[0008] In further embodiments, the power part of the luffing module comprises a luffing cylinder and a luffing integrated valve, and the function valve part comprises a luffing multi-way valve, a luffing pilot proportional pressure reducing assembly, a luffing balance valve, a first overflow valve, a first flow divider valve and a first anti-shock valve integrated on the luffing integrated valve. The luffing pilot proportional pressure reducing assembly comprises a first luffing pilot proportional pressure reducing valve and a second luffing pilot proportional pressure reducing valve.

[0009] In further embodiments, the control module comprises a merging valve and a merging control valve, and the merging valve and the merging control valve are integrated on the auxiliary volume integrated valve motor.

[0010] In further embodiments, the first preset state is that the merging control valve is in a powered state and the merging valve is in a unpowered state. The second preset state is that the merging control valve is in a unpowered state and the merging valve is in a powered state.

[0011] In further embodiments, the first power part comprises a first plunger pump, and the second power part comprises a second plunger pump. The first plunger pump and the second plunger pump are connected to an oil tank.

[0012] In a second aspect, a device is provided, comprising the hydraulic system of the first aspect.

[0013] A third advantage is to provide a crane comprising the hydraulic system of the first aspect; and / or the device of the second aspect.

[0014] The present application has the advantages that the connections of the multi-way valve, the balance valve and the auxiliary valve are integrated on the hoist motor, the luffing oil cylinder and the telescopic oil cylinder respectively, the main hoist integrated valve motor, the auxiliary hoist integrated valve motor, the integrated luffing oil cylinder and the integrated telescopic oil cylinder are maintained at a high pressure, the response time of pipeline pressure building is reduced, the responsiveness of the whole machine operation is improved, the use of hard pipes, soft pipes and pipeline joints is reduced, and the risk of oil leakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the hydraulic system of the present application The symbols are: main hoist integrated valve motor 101, main hoist balance valve 102, main hoist motor 103, auxiliary hoist integrated valve motor 104, first auxiliary pilot proportional pressure reducing valve 105, auxiliary hoist motor 106, auxiliary hoist balance valve 107, auxiliary hoist multi-way valve 108, second auxiliary pilot proportional pressure reducing valve 109, luffing integrated valve 110, second luffing pilot proportional pressure reducing valve 111, luffing balance valve 112, luffing oil cylinder 113, luffing multi-way valve 114, first luffing pilot proportional pressure reducing valve 115, first anti-shock valve 116, first shunt valve 117, first overflow valve 118, telescopic oil cylinder 119, telescopic balance valve 120, telescopic multi-way valve 121, second telescopic pilot proportional pressure reducing valve 122, telescopic integrated valve 123, first telescopic pilot proportional pressure reducing valve 124, second plunger pump 125, oil tank 126, first plunger pump 127, merging valve 128, merging control valve 129, second anti-shock valve 130, second main pilot proportional pressure reducing valve 131, second shunt valve 132, second overflow valve 133, first main pilot proportional pressure reducing valve 134, main hoist multi-way valve 135. DETAILED DESCRIPTION

[0016] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent that the application can be practiced without one or more of these specific details. In other instances, well-known techniques are not described in detail in order not to obscure the application.

[0017] The application will be further described below in conjunction with the drawings.

[0018] Embodiment 1: A hydraulic system is disclosed in this embodiment, comprising a plurality of action modules, a power module for providing pressure oil source for the plurality of action modules, and a control module for controlling the power module. Each of the action modules comprises an action part and a function valve part, the power module inputs the pressure oil source into the action part through the function valve part, so that the action part completes a predetermined action. The function valve part of each action module comprises a plurality of valve parts for centralized integration of the pressure oil source before entering the action part.

[0019] As shown in Figure 1 , the action modules are a main winding module, an auxiliary winding module, an amplitude changing module and a telescopic module respectively; The power module comprises a first power part and a second power part, when the control module is in a first preset state, the first power part provides a pressure oil source for the main winding module and the auxiliary winding module, and the second power part provides a pressure oil source for the amplitude changing module and the telescopic module, when the control module is in a second preset state, the first power part and the second power part simultaneously provide a pressure oil source for one of the action modules.

[0020] The first power part comprises a first plunger pump 127, and the second power part comprises a second plunger pump 125. The first plunger pump 127 and the second plunger pump 125 are connected to an oil tank 126 to extract a pressure oil source from the oil tank 126.

[0021] The power part of the main winding module comprises a main winding motor 103 and a main winding integrated valve motor 101, and the function valve part comprises a main winding multi-way valve 135, a main pilot proportional valve assembly, a main winding balance valve 102, a second overflow valve 133, a second shunt valve 132 and a second anti-shock valve 130 integrated on the main winding integrated valve motor 101. The main pilot proportional valve assembly comprises a first main pilot proportional pressure reducing valve 134 (as shown in Y101A) and a second main pilot proportional pressure reducing valve 131 (as shown in Y101B). Figure 1 Figure 1

[0022] The main winding module completes a main winding action, specifically, the pressure oil source is punched out from the first plunger pump 127, first enters the main winding integrated valve motor 101, so that the main pilot proportional valve assembly is powered and reversed after the main winding multi-way valve 135 and the main winding balance valve 102 are pushed to reverse, and then enters the main winding motor 103, to complete the main winding up and down actions.

[0023] Further, the pressure oil source entering the main winding integrated valve motor makes the first main pilot proportional pressure reducing valve 134 or the second main pilot proportional pressure reducing valve 131 powered and reversed. Specifically, one of the two main pilot proportional pressure reducing valves controls the main winding up of the main winding motor 103, and the other controls the main winding down of the main winding motor 103.

[0024] ​​The second overflow valve 133 plays a role of overload overflow protection, the second shunt valve 132 plays a role of energy saving and pre-pressurization to improve response speed, and the second anti-impact valve 130 reduces impact and shaking of the hydraulic system.

[0025] The power part of the auxiliary winding module comprises an auxiliary winding motor 106 and an auxiliary winding integrated valve motor 104, and the functional valve part comprises an auxiliary winding multi-way valve 108 integrated on the auxiliary winding integrated motor, an auxiliary pilot proportional valve assembly and an auxiliary winding balance valve 107. The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B). Figure 1 The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B). Figure 1 The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B).

[0026] The auxiliary winding module completes the auxiliary winding action, specifically, the pressure oil source is punched out from the first plunger pump 127, enters the main winding integrated valve motor 101 first and then enters the auxiliary winding integrated valve motor 104, so that the auxiliary pilot proportional valve assembly is powered and reversed, pushes the auxiliary winding multi-way valve 108 and the auxiliary winding balance valve 107 to reverse, and then enters the auxiliary winding motor 106, thereby completing the auxiliary winding up or auxiliary winding down action.

[0027] Further, the pressure oil source entering the auxiliary winding integrated valve motor 104 makes the first auxiliary pilot proportional pressure reducing valve 105 or the second auxiliary pilot proportional pressure reducing valve 109 powered and reversed. Specifically, one of the two auxiliary pilot proportional pressure reducing valves controls the auxiliary winding up of the auxiliary winding motor 106, and the other controls the auxiliary winding down of the auxiliary winding motor 106.

[0028] The power part of the auxiliary winding module comprises an auxiliary winding motor 106 and an auxiliary winding integrated valve motor 104, and the functional valve part comprises an auxiliary winding multi-way valve 108 integrated on the auxiliary winding integrated motor, an auxiliary pilot proportional valve assembly and an auxiliary winding balance valve 107. The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B). Figure 1 The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B). Figure 1 The auxiliary pilot proportional valve assembly comprises a first auxiliary pilot proportional pressure reducing valve 105 (Y102A) and a second auxiliary pilot proportional pressure reducing valve 109 (Y102B).

[0029] The auxiliary winding module completes the auxiliary winding action, specifically, the pressure oil source is punched out from the first plunger pump 127, enters the main winding integrated valve motor 101 first and then enters the auxiliary winding integrated valve motor 104, so that the auxiliary pilot proportional valve assembly is powered and reversed, pushes the auxiliary winding multi-way valve 108 and the auxiliary winding balance valve 107 to reverse, and then enters the auxiliary winding motor 106, thereby completing the auxiliary winding up or auxiliary winding down action.

[0030] Further, the pressure oil source entering the telescopic integrated valve 123 makes the first telescopic pilot proportional pressure reducing valve 124 or the second telescopic pilot proportional pressure reducing valve 122 be powered to reverse. Specifically, one of the two telescopic pilot proportional pressure reducing valves controls the extension of the telescopic cylinder 119, and the other controls the retraction of the telescopic cylinder 119.

[0031] The power part of the amplitude changing module includes an amplitude changing cylinder 113 and an amplitude changing integrated valve 110, and the function valve part includes an amplitude changing multi-way valve 114, an amplitude changing pilot proportional pressure reducing assembly, an amplitude changing balance valve 112, a first overflow valve 118, a first shunt valve 117 and a first anti-shock valve 116 integrated on the amplitude changing integrated valve 110; The amplitude changing pilot proportional pressure reducing assembly includes a first amplitude changing pilot proportional pressure reducing valve 115 (Y103A) and a second amplitude changing pilot proportional pressure reducing valve 111 (Y103B). Figure 1 Figure 1

[0032] The amplitude changing module completes the amplitude changing action. Specifically, the pressure oil source is discharged from the second plunger pump 125, enters the telescopic integrated valve 123 and then enters the amplitude changing integrated valve 110, makes the amplitude changing pilot proportional pressure reducing assembly be powered to reverse, pushes the amplitude changing multi-way valve 114 and the amplitude changing balance valve 112 to reverse, and after the amplitude changing balance valve 112 is powered to reverse, enters the amplitude changing cylinder 113, and completes the amplitude changing lifting or amplitude changing falling action.

[0033] Further, the pressure oil source entering the amplitude changing integrated valve 110 makes the first amplitude changing pilot proportional pressure reducing valve 115 or the second amplitude changing pilot proportional pressure reducing valve 111 be powered to reverse. Specifically, one of the two amplitude changing pilot proportional pressure reducing valves controls the amplitude changing lifting of the amplitude changing cylinder 113, and the other controls the amplitude changing falling of the amplitude changing cylinder 113.

[0034] The first overflow valve 118 plays a role of overload overflow protection, the first shunt valve 117 plays a role of energy saving and pre-pressurization to improve response speed, and the first anti-shock valve 116 reduces the impact and shaking of the hydraulic system.

[0035] The control module includes a merging valve 128 and a merging control valve 129, and the merging valve 128 and the merging control valve 129 are integrated on the auxiliary winding integrated valve motor 104.

[0036] The first preset state is that the merging control valve 129 is in a powered state, and the merging valve 128 is in a powered-off state. The second preset state is that the merging control valve 129 is in a powered-off state, and the merging valve 128 is in a powered state.

[0037] ​​Specifically, after the confluence control valve 129 is powered, the confluence valve 128 is closed, the main winding module and the auxiliary winding module can act independently, the amplitude module and the telescopic module can also act independently, and they do not interfere with each other. In the working condition requiring large flow, the confluence control valve 129 is powered off, the confluence valve 128 is opened, and the first plunger pump 127 and the second plunger pump 125 simultaneously provide a pressure oil source for the same action.

[0038] Embodiment 2: The embodiment discloses an apparatus comprising the hydraulic system of any of the preceding embodiments.

[0039] Embodiment 3: The embodiment discloses a crane comprising the hydraulic system of any of the preceding embodiments.

[0040] Alternatively, the crane comprises the apparatus of any of the preceding embodiments.

[0041] Alternatively, the crane comprises the hydraulic system and the apparatus of any of the preceding embodiments.

[0042] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0043] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above-described embodiments, and various equivalent changes can be made to the technical solutions of the present application within the scope of the technical concept of the present application, and these equivalent changes all belong to the protection scope of the present application.

Claims

1. A hydraulic system, characterized in that: It includes several action modules, a power module that provides a pressure oil source for the several action modules, and a control module for controlling the power module; Each of the aforementioned action modules includes an action unit and a function valve unit. The power module inputs the pressure oil source into the action unit through the function valve unit, so that the action unit completes a predetermined action. The aforementioned action modules are, respectively, a main roll module, a secondary roll module, a variable amplitude module, and a telescopic module; The power module includes a first power unit and a second power unit. When the control module is in a first preset state, the first power unit provides a pressure oil source for the main winding module and the auxiliary winding module, and the second power unit provides a pressure oil source for the luffing module and the telescopic module. When the control module is in a second preset state, the first power unit and the second power unit simultaneously provide a pressure oil source for the same actuation module.

2. A hydraulic system according to claim 1, characterized in that: The power unit of the main winding module includes a main winding motor and a main winding integrated valve motor, and the functional valve unit includes a main winding multi-way valve, a main pilot proportional valve assembly, a main winding balance valve, a second overflow valve, a second diverter valve and a second anti-impact valve integrated on the main winding integrated valve motor. The main pilot proportional valve assembly includes a first main pilot proportional pressure reducing valve and a second main pilot proportional pressure reducing valve.

3. A hydraulic system according to claim 1, characterized in that: The power unit of the sub-winding module includes a sub-winding motor and a sub-winding integrated valve motor, and the functional valve unit includes a sub-winding multi-way valve, a sub-pilot proportional valve assembly and a sub-winding balance valve integrated on the sub-winding integrated motor. The secondary pilot proportional valve assembly includes a first secondary pilot proportional pressure reducing valve and a second secondary pilot proportional pressure reducing valve.

4. A hydraulic system according to claim 1, characterized in that: The power unit of the telescopic module includes a telescopic cylinder and a telescopic integrated valve, and the functional valve unit includes a telescopic multi-way valve, a telescopic pilot proportional pressure reducing component, and a telescopic balance valve integrated on the telescopic integrated valve. The telescopic pilot proportional pressure reducing assembly includes a first telescopic pilot proportional pressure reducing valve and a second telescopic pilot proportional pressure reducing valve.

5. A hydraulic system according to claim 1, characterized in that: The power unit of the luffing module includes a luffing cylinder and a luffing integrated valve, and the functional valve unit includes a luffing multi-way valve, a luffing pilot proportional pressure reducing component, a luffing balance valve, a first relief valve, a first flow divider valve, and a first anti-impact valve integrated on the luffing integrated valve. The variable amplitude pilot proportional pressure reducing assembly includes a first variable amplitude pilot proportional pressure reducing valve and a second variable amplitude pilot proportional pressure reducing valve.

6. A hydraulic system according to claim 3, characterized in that: The control module includes a merging valve and a merging control valve, both of which are integrated on the auxiliary integrated valve motor.

7. A hydraulic system according to claim 6, characterized in that: The first preset state is that the merging control valve is in an energized state and the merging valve is in a de-energized state; The second preset state is that the confluence control valve is in a de-energized state and the confluence valve is in an energized state.

8. A hydraulic system according to claim 1, characterized in that: The first power unit includes a first plunger pump, and the second power unit includes a second plunger pump; Both the first plunger pump and the second plunger pump are connected to the oil tank.

9. An apparatus, characterized in that: Includes the hydraulic system as described in any one of claims 1-8.

10. A crane, characterized in that: Includes the hydraulic system as described in any one of claims 1-8; and / or the device as described in claim 9.

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