Super-lift system and auxiliary system switching control valve and crane loading hydraulic system

Abstract

The utility model provides a super-lift system and auxiliary system switching control valve and a crane loading hydraulic system. The super-lift system and auxiliary system switching control valve comprises a super-lift function area used for supplying oil to a super-lift system and an auxiliary function area used for supplying oil to an auxiliary system. The superlift functional area comprises an oil supply switching electromagnetic valve; an inlet of the oil supply switching solenoid valve is connected with the oil supply system, an outlet supplies oil to the superlift system, and a second outlet is connected with the auxiliary functional area. The auxiliary function area comprises a plurality of auxiliary electromagnetic valves, an inlet of any auxiliary electromagnetic valve is connected with the auxiliary function area, and an outlet of any auxiliary electromagnetic valve supplies oil for auxiliary action of the auxiliary system.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a superlifting system and an auxiliary system switching control valve and a crane onboard hydraulic system. Background Art

[0002] With the continuous development of crane technology, superlifting system has become the standard configuration of super-large tonnage cranes. The superlifting system and auxiliary system are controlled by the same oil source, and switching between the superlifting system and the auxiliary system using switching valves and auxiliary valves has become a common control method.

[0003] Common control methods have the following problems in practical applications:

[0004] (1) Due to the small space on the crane turntable, the commonly used control methods take up a lot of space and are difficult to arrange;

[0005] (2) The switching valve and the auxiliary valve have overlapping functions, which increases the switching control cost;

[0006] (3) When the switching valve fails, pressurized oil will enter the auxiliary system;

[0007] (4) The switching valve and the auxiliary valve are connected by pipelines, which poses a risk of oil leakage. Utility Model Content

[0008] Purpose of the utility model: To solve the problems existing in the existing commonly used control methods, the utility model proposes a superlifting system and auxiliary system switching control valve and a crane onboard hydraulic system to achieve switching control of the superlifting system and the auxiliary system.

[0009] Technical solution: A superlifting system and auxiliary system switching control valve, comprising: a superlifting functional area for supplying oil to the superlifting system and an auxiliary functional area for supplying oil to the auxiliary system;

[0010] The super-lifting functional area includes an oil supply switching solenoid valve; the inlet of the oil supply switching solenoid valve is connected to the oil supply system, the outlet is for supplying oil to the super-lifting system, and the second outlet is connected to the auxiliary functional area;

[0011] The auxiliary function area includes a plurality of auxiliary solenoid valves. For any auxiliary solenoid valve, its inlet is connected to the auxiliary function area, and its outlet supplies oil for the auxiliary action of the auxiliary system.

[0012] Furthermore, it also includes a zero leakage solenoid valve, one end of which is connected to the second outlet of the oil supply switching solenoid valve, and the other end of which is connected to the inlets of all auxiliary solenoid valves.

[0013] Furthermore, one end of the zero-leakage solenoid valve is connected to the second outlet of the oil supply switching solenoid valve through an oil passage in the valve.

[0014] Furthermore, the number of the auxiliary solenoid valves depends on the number of auxiliary actions of the auxiliary system.

[0015] The utility model discloses a hydraulic system for a crane, comprising a super-lifting system, an auxiliary system, an oil supply system and a switching control valve; the switching control valve is a super-lifting system and auxiliary system switching control valve disclosed above, in which the inlet of the oil supply switching solenoid valve is connected to the oil supply system, the super-lifting function area supplies oil to the super-lifting system, and the auxiliary function area supplies oil to the auxiliary system.

[0016] Beneficial effects: The utility model realizes the oil supply switching between the superlift system and the auxiliary system through the oil supply switching solenoid valve, performs internal oil supply connection through the oil channel in the valve, realizes the oil supply of the auxiliary system through the zero leakage solenoid valve, and completes the oil supply switching of the auxiliary action through the auxiliary solenoid valve. Compared with the prior art, it has the following advantages:

[0017] (1) The superlift system and auxiliary system switching control valve of the utility model has the advantages of compact structure, small space occupation and simple layout;

[0018] (2) There are no valves with overlapping functions in the superlifting function area and the auxiliary function area of ​​the superlifting system and auxiliary system switching control valve of the utility model, which greatly reduces the cost of the switching control valve;

[0019] (3) The provision of a zero-leakage solenoid valve and the use of an oil passage in the valve in the superlift system and auxiliary system switching control valve of the utility model greatly reduce the risk of oil blowby and oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a superlift system and an auxiliary system switching control valve of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further explained below with reference to the accompanying drawings and embodiments.

[0022] In order to facilitate the understanding of the technical solution of the utility model, the professional terms involved are now explained.

[0023] Superlift system: A jib-type support arm set between the main boom and the tip of the main boom on the crane to improve the relationship between the main boom and the wire rope, so that the crane can reach the maximum lifting capacity and improve the stability of the crane during the lifting process.

[0024] Auxiliary system: A system composed of other auxiliary action functions on the crane except telescopic, luffing, slewing, hoisting and super lifting, such as control room flipping, turntable locking pin, counterweight lifting and lowering, shaft plugging and unplugging, air conditioning, 360° turntable locking and other functions.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, this embodiment discloses a superlift system and auxiliary system switching control valve, which mainly includes: a first solenoid valve 1, a second solenoid valve 2, a third solenoid valve 3, a first overflow valve 4, an oil passage 5 in the valve, a fourth solenoid valve 6, a fifth solenoid valve 7 and a sixth solenoid valve 8. This embodiment realizes the unloading of the oil supply system and the protection of the oil supply system through the first solenoid valve 1.

[0027] The inlet of the second solenoid valve 2 of this embodiment is connected to the oil supply system, the first outlet of the second solenoid valve 2 supplies oil to the superlift system through the cartridge valve, the second outlet of the second solenoid valve 2 is connected to one end of the oil passage 5 in the valve, the other end of the oil passage 5 in the valve is connected to one end of the third solenoid valve 3, and the other end of the third solenoid valve 3 is connected to the fourth solenoid valve 6, the fifth solenoid valve 7, and the sixth solenoid valve 8. In this embodiment, the oil supply switching between the superlift system and the auxiliary system is realized through the second solenoid valve 2, and the internal oil supply connection is performed through the oil passage 5 in the valve. In this embodiment, the third solenoid valve 3 adopts a zero-leakage solenoid valve, and the oil supply of the auxiliary system is realized through the zero-leakage solenoid valve.

[0028] In this embodiment, the oil supply switching of the three auxiliary action functions in the auxiliary system is completed by the fourth solenoid valve 6, the fifth solenoid valve 7, and the sixth solenoid valve 8. In practical applications, the corresponding number of solenoid valves can be reasonably deployed according to the number of auxiliary action functions.

[0029] The switching control valve of this embodiment occupies a small space, and there is no overlapping functional part between the valve corresponding to the superlift system and the valve corresponding to the auxiliary system. At the same time, this embodiment adopts a zero-leakage solenoid valve, and even if the second solenoid valve 2 fails, the pressure oil will not enter the auxiliary system, reducing the risk of oil leakage. And this embodiment adopts an internal valve oil channel 5 between the second solenoid valve 2 and the third solenoid valve 3, which greatly reduces the risk of oil leakage.

[0030] Embodiment 2:

[0031] This embodiment proposes a super-lifting system and auxiliary system switching control valve, which is different from the super-lifting system and auxiliary system switching control valve disclosed in Example 1 only in that this embodiment eliminates the zero-leakage solenoid valve, that is, the other end of the oil channel 5 in the valve is connected to the fourth solenoid valve 6, the fifth solenoid valve 7, and the sixth solenoid valve 8.

[0032] Embodiment 3:

[0033] This embodiment proposes a super-lifting system and auxiliary system switching control valve, which is different from the super-lifting system and auxiliary system switching control valve disclosed in Example 1 only in that the first outlet of the second solenoid valve 2 is connected to the super-lifting system through a sliding valve, and the sliding valve is used to supply oil to the super-lifting system.

[0034] Embodiment 4:

[0035] This embodiment proposes a crane hydraulic system, including a super-lifting system, an auxiliary system, an oil supply system and a switching control valve; the switching control valve is a super-lifting system and auxiliary system switching control valve disclosed in any of the above embodiments, and the inlet of the second solenoid valve 2 is connected to the oil supply system, and the second solenoid valve 2 is used to realize the oil supply switching between the super-lifting system and the auxiliary system.

Claims

1. A superlift system and auxiliary system switching control valve, characterized in that: include: A superlifting functional area for supplying oil to the superlifting system and an auxiliary functional area for supplying oil to the auxiliary system; The super-lifting functional area includes an oil supply switching solenoid valve; the inlet of the oil supply switching solenoid valve is connected to the oil supply system, the outlet is for super-lifting system oil supply, and the second outlet is connected to the auxiliary functional area; The auxiliary function area includes a plurality of auxiliary solenoid valves. For any auxiliary solenoid valve, its inlet is connected to the auxiliary function area, and its outlet supplies oil for the auxiliary action of the auxiliary system.

2. A superlift system and auxiliary system switching control valve according to claim 1, characterized in that: It also includes a zero leakage solenoid valve, one end of which is connected to the second outlet of the oil supply switching solenoid valve, and the other end of which is connected to the inlets of all auxiliary solenoid valves.

3. A superlift system and auxiliary system switching control valve according to claim 2, characterized in that: One end of the zero-leakage solenoid valve is connected to the second outlet of the oil supply switching solenoid valve through an oil passage in the valve.

4. A superlift system and auxiliary system switching control valve according to claim 1, characterized in that: The number of the auxiliary solenoid valves depends on the number of auxiliary actions of the auxiliary system.

5. A hydraulic system for a crane, characterized in that: It includes a super-lifting system, an auxiliary system, an oil supply system and a switching control valve; the switching control valve is a super-lifting system and auxiliary system switching control valve as described in any one of claims 1 to 4, in which the inlet of the oil supply switching solenoid valve is connected to the oil supply system, the super-lifting function area supplies oil to the super-lifting system, and the auxiliary function area supplies oil to the auxiliary system.

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