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Title:
MULTI-STAGE HYDRAULIC SPEED REGULATION SYSTEM, AND HYDRAULIC SUPPORT
Document Type and Number:
WIPO Patent Application WO/2023/206747
Kind Code:
A1
Abstract:
The present disclosure relates to the technical field of hydraulic control systems, and provides a multi-stage hydraulic speed regulation system and a hydraulic support. In the multi-stage hydraulic speed regulation system disclosed by embodiments of the present disclosure, a first reversing valve and a second reversing valve are controlled to be in different states so as to realize three working states of the piston rod of a hydraulic cylinder, namely differential extension, slow extension and retraction. The regulation of the multi-stage hydraulic speed regulation system is therefore realized, the control precision of the multi-stage hydraulic speed regulation system in the embodiments of the invention can be improved, and the control precision of the hydraulic support having the multi-stage hydraulic speed regulation system can be enhanced.

Inventors:
WEI WENSHU (CN)
WANG WEI (CN)
LU DELAI (CN)
LI XIANGBO (CN)
YAO ZHUO (CN)
ZHAO YUBEI (CN)
Application Number:
PCT/CN2022/099256
Publication Date:
November 02, 2023
Filing Date:
June 16, 2022
Export Citation:
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Assignee:
BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD (CN)
BEIJING CCRI TIANMA AUTOMATION TECH CO LTD (CN)
International Classes:
E21D23/16; F15B11/04; F16K11/07
Foreign References:
CN113309547A2021-08-27
CN111236998A2020-06-05
CN111911216A2020-11-10
CN112412915A2021-02-26
CN111473013A2020-07-31
CN206530358U2017-09-29
CN109973455A2019-07-05
CN111336148A2020-06-26
SU939845A11982-06-30
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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