JPS5842644U

JPS5842644U - Pipeline leak detection device

Info

Publication number: JPS5842644U
Application number: JP13623181U
Authority: JP
Inventors: 一郎和田
Original assignee: 株式会社東芝
Priority date: 1981-09-16
Filing date: 1981-09-16
Publication date: 1983-03-22
Also published as: JPS6344750Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案によるパイプライン漏洩検出装置の一実
施例を示すブロック図、第２図は同じく他の実施例を示
すブロック図である。１・・・命令装置、２・・・上流側流量計、３・・・下
流側流量計、４・・・流量制御弁、５・・・流体送出装
置、６・・・流量調節計、７・・・切替回路、８・・・
第１チェック回路、９・・・第１メモリ、１０・・・第
３ゲート、１１・・・第３メモリ、１２・・・第２チェ
ック回路、１３・・・第２メ、モリ、１４・・・第４ゲ
ート、１５・・・第４メモリ、１６・・・第１減算器、
１７・・・第２減算器、１８・・・漏洩判定回路、２０
・・・パイプライン、２０ａ・・・パイプラインの被検
区域。FIG. 1 is a block diagram showing one embodiment of a pipeline leak detection device according to the present invention, and FIG. 2 is a block diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Command device, 2... Upstream flow meter, 3... Downstream flow meter, 4... Flow rate control valve, 5... Fluid delivery device, 6... Flow rate regulator, 7 ...Switching circuit, 8...
1st check circuit, 9... 1st memory, 10... 3rd gate, 11... 3rd memory, 12... 2nd check circuit, 13... 2nd memory, 14... ... Fourth gate, 15... Fourth memory, 16... First subtractor,
17... Second subtractor, 18... Leakage determination circuit, 20
... Pipeline, 20a... Pipeline inspection area.

Claims

[Scope of utility model registration request]

A command device that sequentially outputs commands based on a predetermined leak detection sequence, an upstream flow meter and a downstream flow meter placed across a pipeline inspection area, and one of these flow meters. a flow rate control valve disposed downstream of the flow meter, and a command from the instruction device disposed upstream of the upstream flow meter to cause a substantially constant flow rate of fluid to flow into the test area of the pipeline with varying pressure. a flow controller that controls the opening degree of the flow control valve so as to zero the deviation between the flow rate signal of a flow meter located upstream and close to the flow control valve and the set flow rate; a switching circuit that is connected between the flow rate regulator and the flow control valve and fixes and maintains the opening degree of the flow rate control valve at the opening degree when the flow rate signal matches the set flow rate according to a command from the command device; , when the fluid delivery device is delivering a predetermined flow rate of fluid at a predetermined first test pressure according to a command from the command device, a flow rate located upstream and close to the flow control valve according to a command from the command device; Check the flow rate signal of the meter, and when the flow rate stabilizes at a predetermined flow rate, input this flow rate signal into the first memory, and open the third gate to input the flow rate signal of the flow meter remote from the flow control valve into the third memory. a first check circuit; when the fluid delivery device is delivering a predetermined flow rate of fluid at a predetermined second test pressure in accordance with a command from the command device, the fluid delivery device approaches the flow rate control valve according to a command from the command device; The flow rate signal of the flow meter located upstream is checked, and when the flow rate is stabilized at a predetermined flow rate, this flow rate signal is input to the second memory, and the flow rate signal of the flow meter remote from the flow rate control valve is sent to open the fourth gate. and a second check circuit that subtracts the flow rate signal value stored in the first memory from the flow rate signal value stored in the second memory according to a command from the instruction device and outputs the result. a first subtractor, and a third
a second subtracter that subtracts and outputs the flow rate signal value stored in the memory; and a second subtracter that subtracts and outputs the flow rate signal value stored in the memory;
Calculate the difference between the output of the subtracter and the output of the second subtracter, and when the value of the difference is zero or almost equal to zero, output a signal indicating no leakage, and when it is not zero, output a signal indicating leakage cloth. A pipeline leakage detection device comprising a leakage determination circuit.