SLIDE VALVE TYPE HYDRAULIC REVERSING VALVE HAVING SPECIAL SEALING VALVE CORE STRUCTURE

Title:

SLIDE VALVE TYPE HYDRAULIC REVERSING VALVE HAVING SPECIAL SEALING VALVE CORE STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2022/161190

Kind Code:

A1

Abstract:

A slide valve type hydraulic reversing valve having a special sealing valve core structure, comprising a reversing valve body (1), return springs (6), linear rolling bearings (5), a slide valve core (2) and sealing rings (12, 15); the reversing valve body is provided therein with a valve hole (4) fitting the slide valve core and a plurality of channels in communication with liquid inlet/outlet passages, the slide valve core is in coaxial clearance fit with the valve hole, and two ends of the slide valve core are each sleeved with a return spring coaxial with the slide valve core, left and right cylinders of the slide valve core are rotatably connected to the left and right valve bodies by means of the left and right linear rolling bearings, the slide valve core is provided with a plurality of annular flow guiding grooves (10), the positions needing to be sealed between the slide valve core and the valve bodies are not sealed by a clearance fit with a rigid shaft hole, but are provided with sealing trenches (11), and the sealing rings made of a polymer material are provided in the trenches for sealing. The hydraulic reversing valve effectively ensures the sealing performance of the slide valve type hydraulic reversing valve by means of the sealing structures between the valve core and the valve hole under the emulsion, water and other water-based transmission media, improves the working reliability of the slide valve type hydraulic reversing valve, and expands the usage range of the slide valve type hydraulic reversing valve.

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WO/2017/219876	DIFFERENTIAL PRESSURE UNLOADING SAFETY VALVE
WO/2008/117183	FLUID ACTUATOR WITH LIMIT SENSORS AND FLUID LIMIT VALVES
WO/2020/117999	THREE POSITION METERING VALVE FOR A SELF-CONTAINED ELECTRO-HYDRAULIC ACTUATOR

Inventors:

ZHANG XI (CN)
ZHANG YI (CN)

Application Number:

PCT/CN2022/072094

Publication Date:

August 04, 2022

Filing Date:

January 14, 2022

Export Citation:

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Assignee:

UNIV CHINA MINING (CN)

International Classes:

F15B13/02

Foreign References:

CN104265949A	2015-01-07
CN103256401A	2013-08-21
CN101634371A	2010-01-27
CN112762042A	2021-05-07
CN101893011A	2010-11-24
CN101397921A	2009-04-01
CA586571A	1959-11-10
US5361803A	1994-11-08

Attorney, Agent or Firm:

BEIJING QIANCHENG LAW FIRM (CN)

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