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Hydraulic valve assembly with forced circuit

A technology of hydraulic valves and components, which is applied in the direction of servo motor components, servo meter circuits, load suspension components, etc., and can solve problems such as accidental actuation of hydraulic consumption devices

Active Publication Date: 2020-11-06
ハーヴェーハイドローリックエスイー
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it must be ensured that failure of the selector valve does not lead to unintentional actuation of hydraulic consumers of different groups

Method used

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  • Hydraulic valve assembly with forced circuit

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Embodiment Construction

[0024] The illustrated hydraulic valve assembly 1 has a first control device 2 and a second control device 3 . The first control device 2 has four hydraulic consumption ports A1, A2, B1 and B2 in total. The effective consumption flow is controlled by the first proportional slide valve 4 and the first selector valve 6 . To this end, the pump pressure is supplied to the first control device 2 via the common pressure channel P.

[0025] In the shown first switching position a of the first selector valve 6 , a first group of hydraulic consumers connected to the hydraulic consumer ports A1 , A2 can be actuated by a corresponding displacement of the first proportional slide valve 4 . Depending on the displacement of the first proportional slide valve 4, the hydraulic pressure consumption port A1 or A2 is pressurized from the pressure channel P or released into the tank through the return channel R. By switching the first selection valve 6 to the second switching position b, the se...

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Abstract

The invention relates to a hydraulic valve assembly (1) having a first slide valve (4) and a first A selector valve (6), and a second spool valve (5) and a second selector valve (7) for actuating the third hydraulic pressure consumption port (A3, A4) or the fourth hydraulic pressure consumption port (B3, B4). In the common pressure channel (P) there is a shut-off valve (9) which is pressure-piloted in the opening direction via the control channel (8) for interrupting the supply to the first and second control devices (2, 3 ) pressure supply.

Description

technical field [0001] The invention relates to a hydraulic valve assembly with a positive circuit, and a mobile hydraulic system with a hydraulic valve assembly according to the invention. Background technique [0002] In mobile hydraulics, it often happens that the hydraulic consumers to be controlled are divided into different consumer groups, which are subject to certain implementability requirements. For safety reasons and other reasons, the hydraulic consumers in each individual consumer group should be actuatable substantially in parallel by the hydraulic valve assembly, while the other hydraulic consumers in the other consumer group should not be actuatable. [0003] These requirements have to be fulfilled in mobile hydraulic systems, for example in mobile cranes or forestry vehicles with retractable and extendable supports and multifunctional movable masts, while for safety reasons it is necessary to ensure that the The mast can only be actuated when the bracket is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/06F15B20/00
CPCF15B13/06F15B20/00B66C13/42F15B11/20F15B20/008F15B2211/30585F15B2211/30595F15B2211/411F15B2211/41545F15B2211/7142F15B2211/8636F15B2211/8643B66C13/20F15B13/0402F15B2211/3056F15B2211/8752Y10T137/87209
Inventor 托马斯·韦歇尔让·米歇尔·萨巴蒂尔
Owner ハーヴェーハイドローリックエスイー