One-way throttle valve and lift cylinder control system
A one-way throttle valve and throttling control technology, applied in the field of hydraulic valves, can solve problems such as difficult to meet the use requirements, slow descending speed, impact of lifting cylinders, etc.
Active Publication Date: 2016-06-22
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
This results in that if the throttle is selected too small, the descending speed will be slow, and it is difficult to meet the requirements of use. Negative Effects
Method used
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[0043] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0044] In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself. It should be pointed out that the "front end oil port and rear end oil port" of the one-way throttle valve in the present invention correspond to the forward port and the reverse port of the one-way valve, that is, when the one-way valve is forward-conducting, the hydraulic pressure The oil flows from the front oil port to the rear oil port, and when the rever...
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The invention discloses a one-way throttling valve and a lifting oil cylinder control system. The one-way throttling valve comprises a valve bush (1), a first spring (4) and a valve element (5), wherein a throttling control cavity is formed in the valve element; an inner slider (7) is arranged in the throttling control cavity; a plurality of one-way valve throttling openings (13) which are arrayed at intervals along the sliding direction are formed in an inner peripheral wall of the throttling control cavity; and the inner slider can slide forwards and the one-way valve throttling openings can be sequentially opened by the inner slider. The inner slider is pushed to move forwards in the throttling control valve, and the one-way valve throttling openings can be opened step by step by the inner slider. When the one-way throttling valve is used for the lifting oil cylinder control system, an oil cylinder can ascend or descend stably, and the lifting speed of the oil cylinder is high. When the inner slider slides forwards, hydraulic oil in the throttling control cavity flows to an oil port in the front end of the throttling control cavity through a control cavity throttling opening (12), and the sliding speed of the inner slider can be controlled by controlling the size of the control cavity throttling opening, so that the opening speed of the one-way valve throttling openings can be controlled.
Description
technical field [0001] The invention relates to a hydraulic valve, in particular to a gradually opening one-way throttle valve and an oil cylinder control system using the valve. Background technique [0002] In large crawler cranes, the upper counterweight generally has a self-loading and unloading function, that is, the loading and unloading of the configuration is realized through two counterweight lifting cylinders. Among them, in order to ensure the stability of the moment when the configuration is lowered, a one-way throttle valve is usually installed in the oil inlet pipeline when the configuration is lowered, so as to ensure that there is no impact at the moment when the configuration is lowered, and the start is smooth and stable. [0003] figure 1 Shown is a hydraulic system diagram that can be used to configure a self-loading lifting cylinder control system. The system mainly includes a constant pressure source, a one-way throttle valve 100, a lifting cylinder 20...
Claims
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IPC IPC(8): F15B13/02
CPCF15B13/027
Inventor 靳海滨曾魁
Owner ZOOMLION HEAVY IND CO LTD