Hydraulic switching control system and crane
阅读说明:本技术 一种液压切换控制系统和起重机 (Hydraulic switching control system and crane ) 是由 丁锋 孙文斌 金高 于 2019-10-29 设计创作,主要内容包括:本发明提供一种液压切换控制系统和起重机,涉及工程机械技术领域,包括:在多条工作油路上分别设置有液控换向阀,多个液控换向阀分别通过工作油路与多个执行元件连接。多个二位三通阀分别通过切换油路与多个液控换向阀对应连接。每个二位三通阀分别与泄油系统连接;每个二位三通阀分别与操作系统系统连接;二位三通阀处于第一状态时,操作系统与泄油系统连通,第二状态时,操作系统与液控换向阀连通。本申请通过采用一个二位三通阀,取代多个电磁阀的切换组合,继而使得整个切换系统的油路更为简单,同时,因切换油路的简化以及阀门的数量的减少,可以轻松的将二位三通阀集成在主阀内,从而提高主阀的集成度。(The invention provides a hydraulic switching control system and a crane, which relate to the technical field of engineering machinery and comprise: and the plurality of working oil paths are respectively provided with a hydraulic control reversing valve, and the plurality of hydraulic control reversing valves are respectively connected with the plurality of executing elements through the working oil paths. And the two-position three-way valves are correspondingly connected with the hydraulic control reversing valves through switching oil ways respectively. Each two-position three-way valve is respectively connected with the oil drainage system; each two-position three-way valve is respectively connected with an operating system; when the two-position three-way valve is in the first state, the operating system is communicated with the oil drainage system, and when the two-position three-way valve is in the second state, the operating system is communicated with the hydraulic control reversing valve. This application is through adopting a two-position three-way valve, replaces the switching combination of a plurality of solenoid valves, makes whole switched systems's oil circuit simpler then, simultaneously, because of the reduction of the simplification of switching the oil circuit and the quantity of valve, can relax with the two-position three-way valve integration in the main valve to improve the integrated level of main valve.)
1. A hydraulic switching control system, comprising: the system comprises an operating system, a driving system, a switching system and an oil drainage system; the driving system comprises a plurality of driving working oil paths which are arranged in parallel, hydraulic control reversing valves are respectively arranged on the plurality of driving working oil paths, and the plurality of hydraulic control reversing valves are respectively connected with a plurality of executing elements through the driving working oil paths;
the switching system comprises a plurality of switching oil ways which are arranged in parallel, two-position three-way valves are respectively arranged on the plurality of switching oil ways, and first switching oil ports of the two-position three-way valves are respectively and correspondingly connected with the plurality of hydraulic control reversing valves through the switching oil ways and are used for driving valve cores of the hydraulic control reversing valves to enable the hydraulic control reversing valves to switch the working state; the second switching oil port of each two-position three-way valve is also connected with the oil drainage system respectively; the oil inlet of each two-position three-way valve is also connected with the operating system; when the two-position three-way valve is in a first state, the operating system is communicated with the oil drainage system, and when the two-position three-way valve is in a second state, the operating system is communicated with the hydraulic control reversing valve.
2. A hydraulic switching control system according to claim 1, wherein the two-position, three-way solenoid valve is a two-position, three-way solenoid valve, a power-off state of the two-position, three-way solenoid valve corresponding to the first state, and a power-on state of the two-position, three-way solenoid valve corresponding to the second state.
3. The hydraulic switching control system of claim 2, further comprising a converter and a controller electrically connected to the converter; the controller is respectively connected with the electromagnetic parts of the multiple groups of two-position three-way electromagnetic valves and is used for identifying the conversion signal of the converter and respectively controlling the state switching of each two-position three-way electromagnetic valve according to the conversion signal.
4. The hydraulic switching control system according to any one of claims 1 to 3, wherein control chambers are provided at both ends of a spool of each of the pilot-operated directional control valves, and each of the control chambers is connected to the first switching port of each of the two-position three-way valves, respectively.
5. The hydraulic switching control system according to any one of claims 1 to 3, wherein the operating system includes an operating handle, a pilot main oil passage, and a plurality of pilot working oil passages provided in parallel; the operating handle is respectively communicated with the pilot working oil passages through the pilot main oil passages; the plurality of pilot working oil ways are respectively communicated with oil inlets of the plurality of two-position three-way valves; and a plurality of throttle valves are respectively arranged on the plurality of pilot working oil paths and are positioned between the two-position three-way valve and the operating handle.
6. The hydraulic switching control system according to claim 5, wherein an orifice diameter of the throttle valve is 0.8 mm.
7. The hydraulic switching control system according to claim 1, wherein the drive system further includes drive main oil passages that communicate with a plurality of the drive working oil passages that are provided in parallel, respectively; the driving main oil way is used for being communicated with an oil pump.
8. A hydraulic shift control system as set forth in claim 3 wherein said pilot operated directional control valve is a three position, six way pilot operated directional control valve.
9. A crane comprising an actuator and a hydraulic switching control system according to any one of claims 1 to 8; and a hydraulic control reversing valve in the hydraulic switching control system is respectively connected with the executing element.
10. The crane according to claim 9, wherein the actuator comprises a telescoping mechanism and an auxiliary hoist mechanism; the two hydraulic control reversing valves are respectively connected with the telescopic mechanism and the auxiliary hoisting mechanism; two groups of two-position three-way valves in the hydraulic switching control system are respectively connected with the two hydraulic control reversing valves.
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a hydraulic switching control system and a crane.
Background
With the rapid development of economy, the living standard of people is improved, and higher requirements are made on the completeness of infrastructure construction. High quality infrastructure projects also place higher demands on the performance of the construction machine. Taking a crane as an example, the lifting device can lift and transfer heavy objects within a certain range. However, the traditional crane mainly depends on a plurality of operating rods to realize the operation, so that the integration level of a main valve is low, and the space of an operating room is crowded. With the advancement of technology, a pilot handle has been used instead of a lever to achieve the above-mentioned actions.
In the existing crane, the switching between the telescoping mechanism and the auxiliary hoisting mechanism can be completed only by using the combination of four two-position two-way electromagnetic valves and two-position four-way electromagnetic valves. Because the number of the electromagnetic valves in the switching system is large, the switching system is difficult to integrate with the main valve, so that the integration level of the main valve is low, and the oil circuit connection of the switching control system is complex.
Disclosure of Invention
The present invention provides a hydraulic switching control system and a crane, which solve the problems of low integration level of the main valve and complicated connection of the switching control oil path caused by a large number of solenoid valves in the conventional hydraulic switching system.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in one aspect of the embodiments of the present invention, a hydraulic switching control system is provided, including: the system comprises an operating system, a driving system, a switching system and an oil drainage system; the driving system comprises a plurality of driving working oil paths which are arranged in parallel, and the plurality of driving working oil paths are respectively provided with a hydraulic control reversing valve which is used for being connected with the plurality of executing elements through the driving working oil paths; the switching system comprises a plurality of switching oil paths which are arranged in parallel, two-position three-way valves are respectively arranged on the plurality of switching oil paths, and first switching oil ports of the plurality of two-position three-way valves are respectively and correspondingly connected with the plurality of hydraulic control reversing valves through the switching oil paths and are used for driving valve cores of the hydraulic control reversing valves to enable the hydraulic control reversing valves to switch the working state; the second switching oil port of each two-position three-way valve is also respectively connected with the oil drainage system; the oil inlet of each two-position three-way valve is also connected with an operating system; when the two-position three-way valve is in the first state, the operating system is communicated with the oil drainage system, and when the two-position three-way valve is in the second state, the operating system is communicated with the hydraulic control reversing valve.
Optionally, the two-position three-way valve is a two-position three-way electromagnetic valve, the power-off state of the two-position three-way electromagnetic valve corresponds to the first state, and the power-on state of the two-position three-way electromagnetic valve corresponds to the second state.
Optionally, the hydraulic switching control system further includes a converter and a controller electrically connected to the converter; the controller is respectively connected with the electromagnetic parts of the multiple groups of two-position three-way electromagnetic valves and is used for identifying the conversion signal of the converter and respectively controlling the state switching of each two-position three-way electromagnetic valve according to the new conversion signal.
Optionally, control cavities are arranged at two ends of a valve core of each hydraulic control reversing valve, and each control cavity is correspondingly connected with the first switching oil port of each two-position three-way valve.
Optionally, the operating system includes an operating handle, a pilot main oil path and a plurality of pilot working oil paths arranged in parallel; the operating handle is respectively communicated with the plurality of pilot working oil ways through the pilot main oil way; the plurality of pilot working oil ways are respectively communicated with the oil inlets of the plurality of two-position three-way valves; and a plurality of throttle valves are respectively arranged on the plurality of pilot working oil paths and are positioned between the two-position three-way valve and the operating handle.
Optionally, the orifice diameter of the throttle valve is 0.8 mm.
Optionally, the driving system further includes a driving main oil path respectively communicated with the plurality of driving working oil paths arranged in parallel; the drive main oil passage is used for being communicated with the oil pump.
Optionally, the hydraulic control reversing valve is a three-position six-way hydraulic control reversing valve.
In another aspect of the embodiments of the present invention, there is provided a crane, including an actuator and any one of the above hydraulic switching control systems; and hydraulic control reversing valves in the hydraulic switching control system are respectively connected with the executing elements.
Optionally, the actuating element comprises a telescopic mechanism and an auxiliary hoisting mechanism; the two hydraulic control reversing valves are respectively connected with the telescopic mechanism and the auxiliary hoisting mechanism; two groups of two-position three-way valves in the hydraulic switching control system are respectively connected with the two hydraulic control reversing valves.
The beneficial effects of the invention include:
the invention provides a hydraulic switching control system, comprising: operating system, actuating system, switching system and draining system. The driving system comprises a plurality of working oil paths which are arranged in parallel, hydraulic control reversing valves are respectively arranged on the working oil paths, and the hydraulic control reversing valves are respectively connected with the executing elements through the working oil paths, so that a basic driving structure is formed. The switching system comprises a plurality of switching oil ways arranged in parallel and a plurality of two-position three-way valves, wherein first switching oil ports of the two-position three-way valves are correspondingly connected with the hydraulic control reversing valves through the switching oil ways respectively, so that valve cores of the hydraulic control reversing valves can be driven to enable the hydraulic control reversing valves to be transposed, and then each executing element can execute different commands. The second switching oil port of each two-position three-way valve is also respectively connected with the oil drainage system; the oil inlet of each two-position three-way valve is also connected with an operating system; when the two-position three-way valve is in the first state, the operating system is communicated with the oil drainage system, and when the two-position three-way valve is in the second state, the operating system is communicated with the hydraulic control reversing valve. This application is through in the switched systems that control liquid accuse switching-over valve transposition, adopts a two-position three-way valve, can replace the combination of switching of a two-position two-way solenoid valve and a two-position four-way solenoid valve originally, then makes whole switched systems's oil circuit simpler, simultaneously, because of the simplification of switching the oil circuit and the reduction of the quantity of valve, can be light integrate the two-position three-way valve in the main valve to improve the integrated level of main valve.
The invention also provides a crane, wherein the upper hydraulic switching control system is applied to the crane, and simultaneously, the hydraulic control reversing valves in the hydraulic switching control system are respectively connected with the executing elements. The telescopic winch can simply and conveniently complete the rapid switching of the telescopic winch, the amplitude-variable winch and the main winch or the auxiliary winch, thereby facilitating the operation and control.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a prior art handover control system;
FIG. 2 is a schematic diagram of a hydraulic switching control system according to an embodiment of the present invention;
fig. 3 is a second schematic diagram of a hydraulic switching control system according to an embodiment of the present invention.
Icon: 01-a reversing valve; 02-two-position two-way electromagnetic valve; 03-two-position four-way solenoid valve; 04-a pilot handle; 100-hydraulic control reversing valve; 101-two-position three-way valve; 102-an operating handle; 200-switching oil ways; 300-pilot main oil way; 301-pilot working oil circuit; 400-driving the main oil way; 500-an oil drainage system; 600-an oil return path; 700-integrated main valve; 800-throttle valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. It should be noted that, in the case of no conflict, various features in the embodiments of the present invention may be combined with each other, and the combined embodiments are still within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
When two different execution elements (taking a telescopic mechanism and an auxiliary hoisting mechanism as examples) are switched in the existing hydraulic control system, the switching hydraulic principle is as shown in fig. 1, after an operation switch for loading is turned on, electromagnets on a two-position two-way electromagnetic valve 02 are all in an electrified state, and pilot oil paths at two ends of a valve rod of a three-position six-
The hydraulic control system mainly realizes the action switching between the telescoping mechanism and the auxiliary hoisting mechanism by the power loss and the power gain of the electromagnets of the four two-position two-way electromagnetic valves 02 and the two-position four-way
In one aspect of the embodiments of the present invention, referring to fig. 2, there is provided a hydraulic switching control system including: an operating system, a driving system, a switching system, and an
For example, as shown in fig. 2, the driving system will be described first: the driving
When the pilot operated
In actual use, the control mode is as follows: when the actuating elements communicated with the working oil ports a1 and B1 are in a working state, in order to avoid interference, the actuating elements communicated with the working oil ports a2 and B2 do not act, that is, the two-position three-
Optionally, the two-position three-
For example, as shown in fig. 2, in order to make the control more efficient, a two-position three-way solenoid valve is used to complete the control of the pilot operated
Optionally, the hydraulic switching control system further includes a converter and a controller electrically connected to the converter; the controller is respectively connected with the electromagnetic parts of the multiple groups of two-position three-way electromagnetic valves and is used for identifying the conversion signals of the converter and respectively controlling the state switching of each two-position three-way electromagnetic valve according to the conversion signals.
For example, a converter may be provided on a control panel in the control room or the cab, and a controller may be built in, and an electrical connection may be made from the converter to the controller and then to the electromagnetic portion of the two-position three-way solenoid valve. The converter can be a button, a knob, a multi-gear switch and the like. The converter is manually enabled to be in a certain state according to the requirement of a driver in a cab for current operation, the converter can correspondingly send a conversion signal to the controller at the moment, and the controller judges that the two-position three-
Optionally, control cavities are respectively disposed at two ends of a valve core of each hydraulic control
For example, in order to improve the accuracy of controlling the hydraulic control
Optionally, the operating system includes an
For example, as shown in fig. 3, the operating system may further include an
Alternatively, the orifice diameter of the
For example, the diameter of the throttle orifice of the
Optionally, the driving system further includes a driving
For example, as shown in fig. 2, the driving system further includes a main driving
Optionally, the pilot operated
For example, as shown in FIG. 3, the pilot operated
In another aspect of the embodiments of the present invention, there is provided a crane, including an actuator and any one of the above hydraulic switching control systems; the hydraulically-controlled reversing
As an example, the upper hydraulic switching control system is applied to a crane, and at the same time, the pilot operated
Optionally, the actuating element comprises a telescopic mechanism and an auxiliary hoisting mechanism; the two hydraulic
For example, when the actuator includes a telescopic mechanism and an auxiliary hoisting mechanism, the number of the corresponding pilot-operated
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
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