US 9,541,100 B2Granted

Hydraulic control valve, dual-cylinder extension system and aerial work engineering machine

AssigneeXuzhou Heavy Machinery Co., Ltd.

InventorsXianxin Shi, Xiaodong Xu, Demei Kong, Liangwei Lu

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Abstract

A hydraulic control valve, a dual-cylinder extension system and an aerial work engineering machine. The control valve comprises a flow distributing and collecting valve, and control valve body is provided with a first oil opening, a second oil opening and a third oil opening. A first oil opening, a second oil opening and a third oil opening of said flow distributing and collecting valve are respectively communicated with the first oil opening, the second oil opening and the third oil opening of the valve body. The control valve has two working states, wherein, in the first working state, the oil path between the second oil opening and the third oil opening of the valve body is blocked; and in the second working state, the oil path between the second oil opening and the third oil opening of the valve body is opened.

Claims15

Dependent claims

A hydraulic control valve, comprising a flow divider and combiner, wherein

a valve body of the hydraulic control valve has a first oil port, a second oil port and a third oil port;
the flow divider and combiner has a first oil port, a second oil port and a third oil port which are respectively communicated with the first oil port, the second oil port and the third oil port of the valve body;
the control valve has a first operating state and a second operating state:
in the first operating state, an oil path between the second oil port and the third oil port of the valve body is blocked;
and
in the second operating state, the oil path between the second oil port and the third oil port of the valve body is opened;
and
the valve body of the control valve has a fourth oil port, and the control valve has a third operating state and a fourth operating state:
in the third operating state, the third oil port and the fourth oil port of the valve body are communicated with each other;
and
in the fourth operating state, the second oil port and the fourth oil port of the valve body are communicated with each other.

8 more elements

A dual-cylinder telescopic system, comprising an upper telescopic cylinder and a lower telescopic cylinder, and further comprising a hydraulic control valve, wherein a valve body of the hydraulic control valve has a first oil port acting as a control oil port, and a second oil port and a third oil port which are respectively communicated with rodless chambers of the upper telescopic cylinder and the lower telescopic cylinder;

and the hydraulic control valve comprises a flow divider and combiner, wherein
the flow divider and combiner has a first oil port, a second oil port and a third oil port which are respectively communicated with the first oil port, the second oil port and the third oil port of the valve body;
the control valve has a first operating state and a second operating state:
in the first operating state, an oil path between the second oil port and the third oil port of the valve body is blocked;
and
in the second operating state, the oil path between the second oil port and the third oil port of the valve body is opened;
and
the valve body of the control valve has a fourth oil port, and the control valve has a third operating state and a fourth operating state:
in the third operating state, the third oil port and the fourth oil port of the valve body are communicated with each other;
and
in the fourth operating state, the second oil port and the fourth oil port of the valve body are communicated with each other.

8 more elements

An aerial work engineering machine, comprising a chassis, a lift arm, an upper telescopic cylinder and a lower telescopic cylinder, and further comprising a hydraulic control valve, wherein a valve body of the hydraulic control valve has a first oil port acting as a control oil port, and a second oil port and a third oil port which are respectively communicated with rodless chambers of the upper telescopic cylinder and the lower telescopic cylinder;

and the hydraulic control valve comprises a flow divider and combiner, wherein
the flow divider and combiner has a first oil port, a second oil port and a third oil port which are respectively communicated with the first oil port, the second oil port and the third oil port of the valve body;
the control valve has a first operating state and a second operating state:
in the first operating state, an oil path between the second oil port and the third oil port of the valve body is blocked;
and
in the second operating state, the oil path between the second oil port and the third oil port of the valve body is opened;
and
the valve body of the control valve has a fourth oil port, and the control valve has a third operating state and a fourth operating state:
in the third operating state, the third oil port and the fourth oil port of the valve body are communicated with each other;
and
in the fourth operating state, the second oil port and the fourth oil port of the valve body are communicated with each other.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/346,212Filed 16 Feb 2012
Priority: CN 2011 1 028649623 Sep 2011
Published: US 2015/0014093 A115 Jan 2015
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F15B 11/22
With two or more servomotors: synchronisation of the movement of two or more servomotors
B66F 11/04
Lifting devices specially adapted for particular uses not otherwise provided for: for movable platforms or cabins, e.g. on vehicles, permitting…
B66F 17/006
Safety devices, e.g. for limiting or indicating lifting force: for working platforms
F15B 21/001
Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass:…