Closed system integrated switching valve and control method
A closed system, switching valve technology, applied in multi-port valves, valve devices, mechanical equipment and other directions, can solve the problems of inability to adapt switching valves, large heat generation under large flow conditions, jitter, etc., and achieve reliable action and sealing. The effect of good performance and long service life
Active Publication Date: 2018-09-18
SHENGBANG GRP +3
View PDF4 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In order to solve the problems that the existing switching valves in the background technology cannot adapt to large flow conditions and have large heat generation and vibration during work, the present invention provides a closed system integrated switching valve and a control method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0047] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:
[0048] Depend on figure 1 As shown, a closed system integrated switching valve includes a control switching circuit I, a variable amplitude control circuit II and a telescoping control circuit III. The control switching circuit I includes a first pressure port P1, a second pressure port P2, a second pressure port A reversing valve 1, a second reversing valve 2, a first cartridge valve 3, a second cartridge valve 4, a first spool valve 5, a second spool valve 6 and a shuttle valve 7; the amplitude control loop Including the third cartridge valve and the third reversing valve;
[0049] The shuttle valve 7 is used to select the pressure oil at the first pressure port and the second pressure port, and output it to the first reversing valve, the second reversing valve, and the third reversing valve;
[0050] The first reversing valve 1 has a first position wher...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A closed system integrated switching valve and a control method solve the problems that an existing switching valve cannot adapt to large-flow working conditions and during work, the heating value islarge and shaking is caused. The closed system integrated switching valve comprises a control switching loop, an amplitude variation control loop and a stretching and contracting control loop. The control switching loop comprises a first pressure opening, a second pressure opening, a first reversing valve, a second reversing valve, a first cartridge valve, a second cartridge valve, a first slide valve, a second slide valve and a shuttle valve. The amplitude variation control loop comprises a third cartridge valve and a third reversing valve. System output is controlled through position changing of the reversing valves and the cartridge valves. The closed system integrated switching valve and the control method have the beneficial effects that a winching system can be driven by using a closed pump as a power source, and a stretching and contracting system and an amplitude variation system can also be driven; and due to the adoption of a double-pump system, compound actions can be achieved. The closed system integrated switching valve and the control method further have the beneficial effects that the structure is simple, assembling is convenient, the actions are reliable, the damagecaused by pressing is little, impact is small, the sealing performance is good, zero leakage is achieved and the service life is long.
Description
technical field [0001] The invention relates to a hydraulic control system, in particular to a closed system integrated switching valve and a control method. Background technique [0002] For large-tonnage cranes, especially products over 200 tons, due to the large power, large flow, and high pressure, the hoisting system generally adopts a closed system. Calorific value. The so-called volumetric speed regulation means that the system speed is controlled by adjusting the pump displacement, which is very beneficial to the motor-driven lifting system in which the oil inlet and outlet are basically the same. However, the working conditions of large-tonnage cranes are complicated. In addition to the motor-driven lifting system, there are also telescoping and luffing systems driven by oil cylinders. The typical feature of this system is that there is a large difference in the amount of oil entering and returning. Generally, an open system is used for control. However, this does...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/20F15B11/08F15B13/04F16K11/048
CPCF15B11/08F15B13/0405F16K11/048B66C13/20
Inventor 姜伟姜洪王震山王清送史浙安胡金萍柯稳陈钊汶郑志雨林俊策
Owner SHENGBANG GRP