Shuttle valve
A shuttle valve and valve sleeve technology, applied in the field of hydraulic valves, can solve problems such as the difficulty in realizing the structure of the shuttle valve
Pending Publication Date: 2022-07-15
WEICHAI POWER CO LTD +1
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Problems solved by technology
[0005] In some specific occasions, on the premise of introducing the pilot oil circuit, two oil circuits are connected, and one of the two oil circuits and the pilot oil circuit needs to be selected for output, that is, from the three-way oil circuit. Select one of the oil circuits with the highest oil pressure for output, which is difficult to achieve with the current shuttle valve structure
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.
[0026] In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements....
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The invention belongs to the technical field of hydraulic valves, and discloses a shuttle valve which comprises a valve seat, a valve sleeve and a ball sealer, a containing cavity is formed in the valve sleeve, the ball sealer is contained in the containing cavity and can move in the length direction of the containing cavity, a first oil way communicating with the containing cavity and a first pressure inlet communicating with the first oil way are formed in the valve seat, and a second oil way communicating with the second oil way is formed in the valve sleeve. A second pressure inlet, a third pressure inlet and a pressure outlet which communicate with the containing cavity are formed in the valve sleeve, the third pressure inlet and the pressure outlet communicate with the side wall of the containing cavity, the first oil way and the second pressure inlet communicate with the two ends of the containing cavity, and the plugging ball can plug the first oil way when moving to the first oil way; and when the plugging ball moves to the second pressure inlet, the second pressure inlet can be plugged by the plugging ball. The purpose of selecting one oil way with the maximum pressure from the three sets of hydraulic oil ways for output is achieved.
Description
technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a shuttle valve. Background technique [0002] Shuttle valve is a general term for a type of valve, which belongs to a straight-stroke valve. It is a valve that combines the valve body and the actuator. The advantages are small size, easy installation and low pressure loss. [0003] In the field of hydraulics, the oil circuit of the rotary drilling rig will include a pilot oil circuit, which cooperates with the control of the oil circuit and controls the action of the equipment. For example, in the invention patent application with the application publication number CN113227587A, a control valve is included, which can be a shuttle valve, and has two oil inlets and an oil outlet, and the two oil inlets are respectively connected to the pilot oil circuit and the variable Pump output oil circuit, when the oil pressure of the variable pump output oil circuit is lower than t...
Claims
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IPC IPC(8): F16K11/056F16K1/42F16K1/46F16K27/02
CPCF16K11/056F16K1/42F16K27/0245F16K1/465
Inventor 郝玉亭夏世民商阔
Owner WEICHAI POWER CO LTD