阅读说明：本技术 一种卷扬提升液压系统及起重机 (Winch lifting hydraulic system and crane ) 是由 吴鑫 俞晓斌 石广远 于 2020-06-23 设计创作，主要内容包括：本发明提供了一种卷扬提升液压系统及起重机,涉及起重机技术领域。卷扬提升液压系统包括自动控制油路、手动控制油路、切换控制阀及控制模块；控制模块控制自动控制油路和切换控制阀动作,切换控制阀在控制模块的控制下实现自动控制油路和手动控制油路的油路切换；当切换到自动控制油路时,起重机卷扬进入自动控制模式；当切换到手动控制油路,起重机卷扬进入手动控制模式,由此本发明实现了卷扬的手动控制模式和自动控制模式可切换,操作更方便,解决了操作手长时间保持扳动操纵手柄易产生疲劳的问题。起重机使用了上述的卷扬提升液压系统,实现卷扬的手动控制模式和自动控制模式可切换,操作更方便,不会产生疲劳。(The invention provides a hoisting hydraulic system and a crane, and relates to the technical field of cranes. The winch lifting hydraulic system comprises an automatic control oil path, a manual control oil path, a switching control valve and a control module; the control module controls the automatic control oil path and the switching control valve to act, and the switching control valve realizes the oil path switching of the automatic control oil path and the manual control oil path under the control of the control module; when the automatic control oil way is switched, the crane winch enters an automatic control mode; when the manual control oil way is switched, the crane winch enters a manual control mode, so that the manual control mode and the automatic control mode of the winch can be switched, the operation is more convenient, and the problem that the operator keeps pulling the control handle for a long time and is easy to generate fatigue is solved. The crane uses the winch lifting hydraulic system, so that the manual control mode and the automatic control mode of the winch can be switched, the operation is more convenient, and fatigue cannot be generated.)

1. A hoisting hydraulic system is applied to a crane and is characterized by comprising an automatic control oil path, a manual control oil path, a switching control valve and a control module;

the automatic control oil circuit is used for automatically controlling the hoisting of the crane to perform lifting or descending actions;

the manual control oil circuit is used for operating a hand to manually control the crane to hoist to perform lifting or descending actions;

the control module is respectively and electrically connected with the automatic control oil path and the switching control valve and is used for controlling the automatic control oil path and the switching control valve to act;

the switching control valve is connected with the automatic control oil path and the manual control oil path through pipelines respectively, and is used for realizing oil path switching of the automatic control oil path and the manual control oil path.

2. The hoisting hydraulic system of claim 1, further comprising a lift control valve bank comprising a luffing hydraulic control valve and a lifting hydraulic control valve;

the variable-amplitude hydraulic control valve is respectively connected with the automatic control oil way and the manual control oil way through pipelines and is used for driving a variable-amplitude winch in the winch to perform arm raising or arm bending;

the lifting hydraulic control valve is respectively connected with the automatic control oil path and the manual control oil path through pipelines, and is used for driving a lifting winch in the winch to perform ascending or descending actions.

3. The hoisting hydraulic system of claim 2, wherein the automatic control oil circuit comprises a variable amplitude solenoid valve set and a lifting solenoid valve set;

the variable-amplitude electromagnetic valve bank is connected with the variable-amplitude hydraulic control valve through a pipeline and is used for controlling the variable-amplitude hydraulic control valve to act;

the lifting electromagnetic valve group is connected with the lifting hydraulic control valve through a pipeline and used for controlling the lifting hydraulic control valve to act.

4. The hoisting hydraulic system of claim 3, wherein the luffing solenoid valve bank and the hoisting solenoid valve bank each comprise at least one reversing solenoid valve.

5. The hoisting hydraulic system of claim 4, wherein the amplitude-varying solenoid valve bank and the hoisting solenoid valve bank each comprise a reversing solenoid valve, and the reversing solenoid valve is a three-position four-way solenoid valve.

6. The hoisting hydraulic system of claim 4, wherein the amplitude-varying solenoid valve bank and the hoisting solenoid valve bank each comprise two reversing solenoid valves, and the reversing solenoid valves are two-position four-way solenoid valves.

7. The hoist lift hydraulic system of claim 6, wherein the manual control oil circuit includes a pilot control valve;

the pilot control valve is connected with the variable amplitude hydraulic control valve through the variable amplitude electromagnetic valve bank;

the pilot control valve is connected with the lifting hydraulic control valve through the lifting electromagnetic valve group;

and an operator manually controls the action of the pilot control valve through an operating handle of the crane, and the pilot control valve indirectly drives the amplitude-variable hydraulic control valve and the lifting hydraulic control valve to act.

8. The hoist lift hydraulic system of claim 2, wherein the manual control oil circuit includes a pilot control valve;

the pilot control valve is respectively connected with the amplitude-variable hydraulic control valve and the lifting hydraulic control valve through pipelines;

and an operator manually controls the action of the pilot control valve through an operating handle of the crane, and the pilot control valve directly drives the amplitude-variable hydraulic control valve and the lifting hydraulic control valve to act.

9. The winch lifting hydraulic system according to any one of claims 2 to 8, wherein the oil inlets of the luffing hydraulic control valve and the lifting hydraulic control valve are connected with the automatic control oil path and the manual control oil path through shuttle valves.

10. A crane comprising a hoisting hydraulic system according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of cranes, in particular to a hoisting hydraulic system and a crane.

Background

The crane refers to a multi-action crane for vertically lifting and horizontally transporting heavy objects within a certain range, wherein a hoisting system (comprising a main hoisting and an auxiliary hoisting) is one of the most critical technical parameters for measuring the crane.

Disclosure of Invention

In order to solve the above technical problems, a first object of the present invention is to provide a hoisting hydraulic system, which realizes switching between a manual control mode and an automatic control mode of a hoist, is more convenient to operate, and does not cause fatigue.

In order to solve the above technical problems, a second object of the present invention is to provide a crane, which uses the hoisting hydraulic system provided by the first object, and realizes switching between a manual control mode and an automatic control mode of a hoist, thereby facilitating operation and avoiding fatigue.

In order to achieve the first purpose, the invention provides a hoisting hydraulic system, which is applied to a crane and comprises an automatic control oil path, a manual control oil path, a switching control valve and a control module;

the automatic control oil circuit is used for automatically controlling the hoisting of the crane to perform lifting or descending actions;

the manual control oil circuit is used for operating a hand to manually control the crane to hoist to perform lifting or descending actions;

the control module is respectively and electrically connected with the automatic control oil path and the switching control valve and is used for controlling the automatic control oil path and the switching control valve to act;

the switching control valve is connected with the automatic control oil path and the manual control oil path through pipelines respectively, and is used for realizing oil path switching of the automatic control oil path and the manual control oil path.

In a possible implementation manner, the hoisting hydraulic system further includes a lifting control valve group, and the lifting control valve group includes a variable amplitude hydraulic control valve and a lifting hydraulic control valve;

the variable-amplitude hydraulic control valve is respectively connected with the automatic control oil way and the manual control oil way through pipelines and is used for driving a variable-amplitude winch in the winch to perform arm raising or arm bending;

the lifting hydraulic control valve is respectively connected with the automatic control oil path and the manual control oil path through pipelines, and is used for driving a lifting winch in the winch to perform ascending or descending actions.

In a possible implementation manner, further, the automatic control oil path comprises a variable amplitude solenoid valve group and a lifting solenoid valve group;

the variable-amplitude electromagnetic valve bank is connected with the variable-amplitude hydraulic control valve through a pipeline and is used for controlling the variable-amplitude hydraulic control valve to act;

the lifting electromagnetic valve group is connected with the lifting hydraulic control valve through a pipeline and used for controlling the lifting hydraulic control valve to act.

In a possible embodiment, further, each of the amplitude solenoid valve group and the lifting solenoid valve group comprises at least one reversing solenoid valve.

In a possible implementation manner, further, the variable amplitude solenoid valve group and the lifting solenoid valve group each include a reversing solenoid valve, and the reversing solenoid valve is a three-position four-way solenoid valve.

In a possible implementation manner, further, each of the amplitude-variable solenoid valve bank and the lifting solenoid valve bank includes two reversing solenoid valves, and each of the reversing solenoid valves is a two-position four-way solenoid valve.

In one possible embodiment, further, the manual control oil path includes a pilot control valve;

the pilot control valve is connected with the variable amplitude hydraulic control valve through the variable amplitude electromagnetic valve bank;

the pilot control valve is connected with the lifting hydraulic control valve through the lifting electromagnetic valve group;

and an operator manually controls the action of the pilot control valve through an operating handle of the crane, and the pilot control valve indirectly drives the amplitude-variable hydraulic control valve and the lifting hydraulic control valve to act.

In one possible embodiment, the manual control oil passage includes a pilot control valve;

the pilot control valve is respectively connected with the amplitude-variable hydraulic control valve and the lifting hydraulic control valve through pipelines;

and an operator manually controls the action of the pilot control valve through an operating handle of the crane, and the pilot control valve directly drives the amplitude-variable hydraulic control valve and the lifting hydraulic control valve to act.

In a feasible implementation mode, further, the oil inlets of the variable amplitude hydraulic control valve and the lifting hydraulic control valve are connected with the automatic control oil path and the manual control oil path through shuttle valves.

To achieve the second object, the present invention provides a crane, which includes the hoisting hydraulic system provided by the first object.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a hoisting hydraulic system, which comprises an automatic control oil path, a manual control oil path, a switching control valve and a control module, wherein the automatic control oil path is connected with the manual control oil path; the control module is respectively and electrically connected with the automatic control oil path and the switching control valve, and controls the automatic control oil path and the switching control valve to act; when the automatic control oil way is switched, the crane winch automatically executes lifting or descending actions, namely, the crane winch enters an automatic control mode; when the manual control oil circuit is switched, the operator controls the crane winch to perform lifting or descending actions through manual control, namely, enters a manual control mode, so that the manual control mode and the automatic control mode of the winch can be switched, the operation is more convenient, and the problem that the operator keeps pulling the operating handle for a long time and is easy to generate fatigue is solved.

The crane provided by the invention uses the winch lifting hydraulic system, so that the manual control mode and the automatic control mode of the winch can be switched, the operation is more convenient, and the fatigue is not generated.

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 shows a modular schematic diagram of a hoisting hydraulic system according to the present invention;

fig. 2 is a schematic diagram illustrating an oil circuit of a hoisting hydraulic system according to a first embodiment of the present invention;

fig. 3 is a schematic view illustrating a partial oil path structure of the hoist lifting hydraulic system provided in fig. 2;

fig. 4 is a schematic diagram illustrating an oil path of a hoisting hydraulic system according to a second embodiment of the present invention;

fig. 5 is a schematic view illustrating a partial oil path structure of the hoist lifting hydraulic system provided in fig. 4.

Description of the main element symbols:

1-an oil supply module; 10-a fuel tank; 11-a hydraulic pump; 12-pressure overflow valve group; 13-main line;

2-switching the control valve; 20-an electromagnetic switching valve;

3-automatically controlling an oil way; 30-a first branch line; 31-a variable amplitude electromagnetic valve bank; 310-a first reversing solenoid valve; 31 a-a first variable amplitude reversing solenoid valve; 31 b-a second variable amplitude reversing solenoid valve; 32-lifting the electromagnetic valve group; 320-a second reversing solenoid valve; 32 a-a first lift reversal solenoid valve; 32 b-a second lift reversal solenoid valve;

4-manually controlling the oil way; 40-a second branch line; 41-a pilot control valve; 42-a pressure sensor; 43-a third branch line;

5-lifting control valve group; 50-variable amplitude hydraulic control valve; 51-a poppet pilot operated valve; 52-a shuttle valve;

6, hoisting; 60-amplitude-variable winding; 61-hoisting and winding;

7-control module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electric connection or oil circuit connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.