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1. 发明公开

EP3390842A1 HYDRAULIC VALVE DEVICE WITH MULTIPLE WORKING SECTIONS WITH PUMP CONTROL SYSTEM 有权
公开(公告)号：EP3390842A1
公开(公告)日：2018-10-24
申请号：EP16823216.3
申请日：2016-12-16
申请人： Walvoil S.p.A.
发明人： MUSIANI, Massimiliano
IPC分类号： F15B11/042 , F15B11/044 , F15B11/05 , F15B11/16
CPC分类号： F15B11/055 , F15B11/042 , F15B11/044 , F15B11/165 , F15B2211/20546 , F15B2211/3116 , F15B2211/40507 , F15B2211/50554 , F15B2211/605 , F15B2211/6355
摘要： Modular directional valve with two or more crossing elements (E1.. En) fed by a variable displacement (PA), negative control or load sensing pump. A pressure regulator (5) is placed in the entry side and only on the bypass line and upstream of the first element (E1..En). In the single drive, it makes the flow rate to the utility independent of the load and allows setting a maximum flow rate at the end of the stroke; in multiple drives, it ensures that the sum of the required flow rates is independent of the loads.

2. 发明授权

EP3191716B1 CONTROL DEVICE FOR ZERO-LEAK DIRECTIONAL CONTROL VALVES 有权
公开(公告)号：EP3191716B1
公开(公告)日：2018-11-21
申请号：EP15756469.1
申请日：2015-07-15
申请人： Walvoil S.p.A.
发明人： MUSIANI, Massimiliano , MESTURINI, Davide
IPC分类号： F15B11/00
CPC分类号： F15B11/16 , E02F3/325 , E02F9/2267 , E02F9/2271 , F15B11/003 , F15B13/01 , F15B2211/30515 , F15B2211/329 , F15B2211/355 , F15B2211/6355
摘要： Hydraulic system, distributor and bidirectional valve to activate the hydraulic actuators (3; 3a, 3b) of an operating machine; the hydraulic system (1) having: a first high-pressure oil delivery (4); an oil drain (8); a slide valve with a spool, which is axially sliding and is suited to control a hydraulic actuator (3); a second low-pressure oil delivery (6); an activation valve (15); and a bidirectional valve (21) with a first passage opening (22) that can be hydraulically connected, by the slide valve (9) to the first delivery (4) and a second passage opening (23) hydraulically connected to the actuator (3); wherein, the bidirectional valve has an inlet opening (24) that can be connected, by the activation valve (15) to the second delivery (6) and an outlet opening (25) that can be connected, by the spool (12) to the drain (8).

3. 发明公开

EP3191716A2 CONTROL DEVICE FOR ZERO-LEAK DIRECTIONAL CONTROL VALVES 有权
标题翻译：用于零泄漏方向控制阀的控制装置
公开(公告)号：EP3191716A2
公开(公告)日：2017-07-19
申请号：EP15756469.1
申请日：2015-07-15
申请人： Walvoil S.p.A.
发明人： MUSIANI, Massimiliano , MESTURINI, Davide
IPC分类号： F15B11/00
CPC分类号： F15B11/16 , E02F3/325 , E02F9/2267 , E02F9/2271 , F15B11/003 , F15B13/01 , F15B2211/30515 , F15B2211/329 , F15B2211/355 , F15B2211/6355
摘要： Hydraulic system, distributor and bidirectional valve to activate the hydraulic actuators (3; 3a, 3b) of an operating machine; the hydraulic system (1) having: a first high-pressure oil delivery (4); an oil drain (8); a slide valve with a spool, which is axially sliding and is suited to control a hydraulic actuator (3); a second low-pressure oil delivery (6); an activation valve (15); and a bidirectional valve (21) with a first passage opening (22) that can be hydraulically connected, by the slide valve (9) to the first delivery (4) and a second passage opening (23) hydraulically connected to the actuator (3); wherein, the bidirectional valve has an inlet opening (24) that can be connected, by the activation valve (15) to the second delivery (6) and an outlet opening (25) that can be connected, by the spool (12) to the drain (8).
摘要翻译：液压系统，分配器和双向阀，用于启动操作机器的液压执行器（3; 3a，3b）; 所述液压系统（1）具有：第一高压油递送件（4）; 一个排油口（8）; 带有一个轴向滑动并适于控制液压致动器（3）的滑阀的滑阀; 第二低压输油器（6）; 一个启动阀（15）; 和具有第一通道开口（22）的双向阀（21），所述第一通道开口能够通过所述滑阀（9）液压连接到所述第一输送装置（4）和液压连接到所述致动器的第二通道开口（23）（3）; 其中所述双向阀具有能够通过所述致动阀（15）连接到所述第二输送装置（6）的入口开口（24）和能够借助于所述阀芯连接的出口开口（25）（12）连接到排水管（8）。

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