Title:
DIAGNOSIS METHOD FOR GATE VALVE AND GATE VALVE DIAGNOSIS SYSTEM
Document Type and Number:
Japanese Patent JP2020106064
Kind Code:
A
Abstract:
To provide a diagnosis method for a gate valve capable of diagnosing a failure of the gate valve without stopping operation of the gate valve, and a gate valve diagnosis system.SOLUTION: The present invention relates to a diagnosis method for a gate valve 1 for diagnosing a failure of the gate valve 1 in which a guide rail 20 for guiding a valve body 4 which opens/closes a flow channel 3 in an opening/closing direction is provided within a valve box 2. The valve box 2 comprises a valve box main body part 7 including a flow channel 3, and a bonnet part 8. The valve body 4 is moved in the opening/closing direction in slide contact with the guide rail 20 by a fluid pressure type actuation device 6, rushes into the valve box main body part 7 at a closing position to shut down the flow channel 3 and leaves the inside of the valve box main body part 7 to the inside of the bonnet part 8 at an opening position. The present invention also relates to the method and a gate valve diagnosis system in which an actuation pressure of the actuation device 6 for moving the valve body 4 in the opening/closing direction is detected and the failure of the gate valve 1 is diagnosed on the basis of a change in the detected actuation pressure.SELECTED DRAWING: Figure 5
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Inventors:
YOSHIDA YASUTARO
TAKAHASHI MASASHI
TAKAHASHI MASASHI
Application Number:
JP2018243841A
Publication Date:
July 09, 2020
Filing Date:
December 27, 2018
Export Citation:
Assignee:
KUBOTA KK
International Classes:
F16K37/00
Domestic Patent References:
| JPH07119862A | 1995-05-12 | |||
| JP2014080996A | 2014-05-08 | |||
| JP2017166621A | 2017-09-21 |
Foreign References:
| US20160061335A1 | 2016-03-03 |
Attorney, Agent or Firm:
Morimoto International Patent Office