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Three-cavity type three-position four-way air-control reversing hydraulic valve

A hydraulic valve and valve body technology, applied in the field of hydraulic components, can solve the problems of large volume, poor workmanship, and complex structure of the valve body

Inactive Publication Date: 2013-09-25
王玉红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape of the valve body is designed as a long cube, and the rectangular cylinder and the valve body are connected as a whole. Therefore, the valve body is large in size, heavy in weight, difficult to process, and prone to errors of different axes; this air-controlled reversing valve Equipped with a feedback overflow valve, it is connected to the outside of the valve body, and it is connected to the inner cavity of the tail of the valve body after three times of inversion. The structure is complex and the workmanship is poor.

Method used

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  • Three-cavity type three-position four-way air-control reversing hydraulic valve
  • Three-cavity type three-position four-way air-control reversing hydraulic valve
  • Three-cavity type three-position four-way air-control reversing hydraulic valve

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0020] refer to figure 1 , figure 2 , The valve body 1 of the present invention is in the shape of a horizontal long cylinder, with a boss T on the top of the valve body 1, and a radial oil return hole H and an oil outlet hole S are opened on the boss T, each equipped with an oil pipe joint 2 Connect the oil pipe 3, respectively connect the hydraulic oil tank 21 and the oil cylinder 24, the top surface of the valve body 1 in front of the boss T is provided with a radial descending air hole Q1 and a lifting air hole Q2, each connected to the air pipe 5 through the air pipe joint 6, the connection ratio of the air pipe 5 Air valve 20. The vertical mounting surface P on the back of the valve body 1 is provided with four horizontal and horizontal mounting holes K penetrating through the valve body 1 for assembling bolts to install and fix the valve body ...

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Abstract

Disclosed is a three-cavity type three-position four-way air-control reversing hydraulic valve. A valve hole (L) is communicated with a front cavity (G3), a middle cavity (G2) and a rear cavity (G1), an oil return hole (H) and an oil outlet hole (S) are respectively communicated with a hydraulic oil tank (21) and an oil cylinder (24), a horizontal oil return hole (E) and a horizontal oil inlet hole (J) are connected with an oil pump (23), and a lifting air hole (Q2) and a descending air hole (Q1) are communicated a proportional air valve (20) via air pipes (5). The lifting air hole (Q2) intakes air, a valve stem (9) translates backwards, the oil pump (23) supplies oil into a valve body (1) and the oil cylinder (24) in sequence, and the oil cylinder (24) is lifted up. The descending air hole (Q1) intakes air, the valve stem (9) translates forwards, hydraulic oil enters the valve body (1) and returns to the oil pump (23) via the horizontal oil return hole (E), no oil is supplied to the oil cylinder (24), the hydraulic oil in the oil cylinder (24) returns to the valve body (1) via the oil outlet hole (S), partially flows into the oil pump (23) via the horizontal oil return hole (E) and partially flows into the hydraulic oil tank (21) via the oil return hole (H), and thereby oil circulation is formed. The three-cavity type three-position four-way air-control reversing hydraulic valve is small in size, light in weight, good in matching capability, high working efficiency and wide in application range.

Description

technical field [0001] The invention relates to hydraulic components, in particular to a reversing hydraulic valve matched with a lifting oil cylinder. Background technique [0002] Hydraulic valves are widely used in hydraulic systems and are important basic components in hydraulic systems. At present, the lifting cylinders of domestic and foreign dump trucks are mostly equipped with three-position three-way or four-way air-controlled reversing valves with five chambers inside to control the cylinder. The air-operated reversing valve adopts K-type functional type, and a U-shaped two-way oil return channel is set outside the valve hole on the valve body. The shape of the valve body is designed as a long cube, and the rectangular cylinder and the valve body are connected as a whole. Therefore, the valve body is large in size, heavy in weight, difficult to process, and prone to errors of different axes; this air-controlled reversing valve Equipped with a feedback relief valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/12
Inventor 邱金成
Owner 王玉红
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