An oil cylinder quick drop valve
A technology of oil cylinders and oil passages, applied in the field of hydraulic control components, can solve problems such as low degree of automation and complex structure, and achieve the effects of reducing energy consumption, avoiding back pressure and ensuring speed
Active Publication Date: 2016-06-15
SHANTUI CONSTR MASCH CO LTD
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Problems solved by technology
However, the fast-falling valve needs to be adjusted by external control equipment to realize its function, and the structure is complex and the degree of automation is low.
Method used
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Embodiment Construction
[0027] In order to clearly illustrate the technical features of this solution, the specific implementation of the present invention will be further described below according to the accompanying drawings.
[0028] Such as figure 2 , image 3As shown, a quick drop valve for an oil cylinder includes a valve body 1 and a valve cover 2, and the valve cover 2 is fixed on the valve body 1 through bolt connection, and a sealing ring 27 is arranged between the valve body 1 and the valve cover 2; Body 1 is provided with rodless chamber oil passage 3, rod chamber oil passage 4 and check valve; the upper end oil port of rodless chamber oil passage 3 is connected to the main valve, and the lower end oil port is connected to the cylinder rodless chamber; the rod chamber oil passage The upper port of channel 4 is connected to the main valve, and the lower oil port is connected to the rod cavity of the cylinder; the oil channel 3 of the rodless cavity communicates with the oil channel 4 of ...
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The invention relates to the technical field of hydraulic control components, in particular to a quick-drop valve for an oil cylinder, which includes a valve body in which an oil passage with a rodless chamber, an oil passage with a rod chamber and a check valve are arranged. The oil passage with a rodless chamber It communicates with the oil passage in the rod chamber through a side passage, and the check valve is set on the side passage; the oil passage in the rod chamber communicates with the chamber B on the upper part of the check valve through oil passage A; in the rod chamber A throttle valve is arranged between the upper oil port and the lower oil port of the oil passage, the throttle valve is arranged below the oil passage A, and the throttle valve is arranged above the side passage. The beneficial effects of the present invention are: it can not only ensure the rapid oil replenishment to the rodless chamber of the oil cylinder when the blade is lowered, prevent the components of the hydraulic system from being damaged due to negative pressure, but also ensure the speed when the blade is lifted, and avoid unnecessary backlash. pressure, reducing energy consumption, and the whole process is fully automatic, realizing safe, automatic, economical and stable operation of the blade lift cylinder.
Description
technical field [0001] The invention relates to the technical field of hydraulic control components, in particular to a quick-drop valve for an oil cylinder. Background technique [0002] The bulldozer blade lifting cylinder is a double-acting piston hydraulic cylinder. The cylinder barrel is hinged on the bulldozer body, and one end of the piston rod is hinged on the blade. When the piston rod is extended, the blade is lowered, and when the piston rod is retracted, the blade is raised. . When the shovel is lowered, due to the influence of the self-weight of the shovel, a negative pressure is formed in the rodless cavity of the shovel lifting cylinder. At this time, if the oil is not replenished to the rodless cavity, the hydraulic system components will be damaged. The quick drop valve is a hydraulic valve installed in the hydraulic circuit system of the blade, which can replenish the hydraulic oil in the rod chamber of the blade lifting cylinder to the rodless chamber whe...
Claims
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IPC IPC(8): F15B13/02
Inventor 沈彦斌张翠翠孙庆冲
Owner SHANTUI CONSTR MASCH CO LTD