Title:
COMBINED LOW-TORQUE FLAT GATE VALVE
Document Type and Number:
WIPO Patent Application WO/2019/019127
Kind Code:
A1
Abstract:
A combined low-torque flat gate valve, comprising a valve body (100), a valve cavity (200), first valve seats (300) and a first valve plate (400); the first valve seats (300) are provided in the valve cavity (200) and connect medium channels (101) located at two ends thereof, and divide the valve cavity (200) into an upper cavity (201), a middle cavity (202) and a lower cavity (203) in order. Said valve further comprises: a second valve plate (500), which is provided in the first valve plate (400), the first valve plate (400) being provided with flow guide channels (401), the flow guide channels (401) being in communication with the medium channels (101); and second valve seats (600), which connect the flow guide channels (401) located at two ends of the second valve seat. By providing the two second valve seats (600) and the second valve plate (500) in the interior of the first valve plate (400), a small sealing pair having a low opening torque is formed, such that the flow guide channels (401) can be opened under the condition of full-pressure, reducing the pressure difference between two sides of the first valve plate (400) and then driving the first valve plate (400) to move so as to fully open the large-diameter gate valve, solving the traditional problem that a flat gate valve, which has a huge diameter, in an oil and gas pipeline cannot be operated by a single person.
Inventors:
ZHOU CHUANBEN (CN)
HUANG GUOCHENG (CN)
HUANG GUOCHENG (CN)
Application Number:
PCT/CN2017/094810
Publication Date:
January 31, 2019
Filing Date:
July 28, 2017
Export Citation:
Assignee:
JIANGSU ZHENGXUAN PETROLEUM MACHINERY CO LTD (CN)
International Classes:
F16K3/02; F16K3/314
Domestic Patent References:
| WO2013158029A1 | 2013-10-24 |
Foreign References:
| CN101680554A | 2010-03-24 | |||
| CN102537392A | 2012-07-04 | |||
| US20150083954A1 | 2015-03-26 | |||
| CN107387787A | 2017-11-24 | |||
| CN2072623U | 1991-03-06 | |||
| CN103925382A | 2014-07-16 | |||
| US4711262A | 1987-12-08 | |||
| CN201145054Y | 2008-11-05 | |||
| RU2586958C1 | 2016-06-10 |
Attorney, Agent or Firm:
YUV (NANJING) INTELLECTUAL PROPERTY FIRM (SPECIAL GP) (CN)
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