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An internally controlled four-way reversing valve

A four-way reversing valve and spool technology, applied in the field of hydraulic reversing valve, can solve the problems of reducing the working performance of the hydraulic cylinder, hitting the cylinder, etc., and achieve the effect of compensating for leakage and processing errors, and eliminating offset.

Inactive Publication Date: 2015-09-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing engineering technology, it is often encountered that the displacement of the hydraulic cylinder is offset, and even the cylinder may be hit, which greatly reduces the performance of the hydraulic cylinder

Method used

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  • An internally controlled four-way reversing valve
  • An internally controlled four-way reversing valve
  • An internally controlled four-way reversing valve

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] like figure 1 and figure 2 As shown, the internal control four-way reversing valve of the present invention mainly includes a valve body 1 , a valve sleeve 2 , a first valve core 3 , a second valve core 4 , a first end cover 5 and a second end cover 6 . The first valve core 3 and the second valve core 4 are placed in the cavity of the valve body 1 , and the first end cover 5 and the second end cover 6 are installed together with the valve body 1 at the end faces of the two ends of the valve body 1 respectively.

[0024] like figure 1 , figure 2 , Figure 5 and Figure 6 As shown, the first valve core 3 is provided with a first boss 7 and a second boss 8, and the second valve core 4 is provided with a third boss 9, a fourth boss 10 and a fifth boss 11 , and the first boss 7, the second boss 8, the third boss 9, the fourth boss 10 and the fifth boss 11 are ...

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Abstract

The invention discloses an internal control type four-way reversing valve. A valve core is composed of a first core body and a second core body, wherein a first boss and a second boss are arranged on the first core body, and a third boss, a fourth boss and a fifth boss are arranged on the second valve core body. The first boss, the second boss, the third boss, the fourth boss and the fifth boss are sequentially arranged along the direction from a first end cover to a second end cover. A hollow cavity is formed between every two adjacent bosses, and a spring is arranged in the hollow cavity between the second boss and the third boss. The fifth boss is provided with an axial through hole, and the outer end face of the fifth boss is in close contact with the second end cover. Grooves are correspondingly formed at intervals in the end faces of the first boss, the second boss, the third boss and the fourth boss along the circumferential directions. By means of the internal control type four-way reversing valve, leakage and machining errors of an existing four-way reversing valve can be compensated, and offset during operation of a hydraulic cylinder can be eliminated.

Description

technical field [0001] The invention relates to a hydraulic reversing valve, in particular to a four-way reversing valve for controlling a hydraulic cylinder. Background technique [0002] In the existing engineering technology, it is often encountered that the displacement of the executive hydraulic cylinder is offset, and even the cylinder may collide, which greatly reduces the working performance of the executive hydraulic cylinder. There are many reasons for the displacement of the hydraulic cylinder to be biased, the most important of which is the leakage of the control valve and machining errors, which make the flow of hydraulic oil through the control of the A port and the B port of the hydraulic cylinder unequal. Contents of the invention [0003] The object of the present invention is to provide a new internally controlled four-way reversing valve for the defects of hydraulic cylinder offset in the prior art. [0004] In order to achieve the above object, the tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
Inventor 龚国芳韩冬肖红秀葛笏良董小坤王文杰杨华勇
Owner ZHEJIANG UNIV
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