Title:
DUAL-SPRING HIGH-PRECISION HYSTERESIS-TYPE PRESSURE CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2019/071871
Kind Code:
A1
Abstract:
A dual-spring high-precision hysteresis-type pressure control valve comprises an upper valve body (8), a lower valve body (1), a dual-spring pressure regulating valve, a spring energy storage linkage mechanism, and a main valve. The dual-spring pressure regulating valve comprises a coarse adjustment stud (12), a coarse adjustment spring (10), a fine adjustment stud (13), a fine adjustment spring (11), a spring guiding sleeve (7), and a pressure regulating spool (6). The spring energy storage linkage mechanism comprises a guide block (5), a spool control linkage (17), an extension spring (18), an extension spring lever (2), and an extension spring slide hook (3). One end of the spool control linkage (17) is connected to the guide block (5), and the other end is connected to a main spool transmission rod (28) by a pin (19). The extension spring slide hook (3) sleeves on the guide block (5). One end of the lever (2) is disposed below the extension spring slide hook (3) and drives the extension spring slide hook (3) to move upwards, so as to control the status of the extension spring (18), thereby enabling the spring to store energy. The spring energy storage linkage mechanism enables instantaneous opening and closing of a right side spool. The dual-spring high-precision hysteresis-type pressure control valve has low manufacturing costs. The invention improves precision of control of an opening pressure and a closing pressure of a pressure control valve and improves status control of opening and closing of a main valve.
Inventors:
LIU XIUMEI (CN)
LI RUIRUI (CN)
LI BEIBEI (CN)
HE JIE (CN)
LI RUIRUI (CN)
LI BEIBEI (CN)
HE JIE (CN)
Application Number:
PCT/CN2018/072846
Publication Date:
April 18, 2019
Filing Date:
January 16, 2018
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
F16K17/20; F15B13/02; F16K1/32; F16K31/122
Foreign References:
| CN107504201A | 2017-12-22 | |||
| CN202001688U | 2011-10-05 | |||
| CN103671324A | 2014-03-26 | |||
| CN103375626A | 2013-10-30 | |||
| CN204267413U | 2015-04-15 | |||
| US4275758A | 1981-06-30 | |||
| US20090101218A1 | 2009-04-23 | |||
| US4197874A | 1980-04-15 |
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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