JPS6079134U

JPS6079134U - High concentration/low concentration gas detection device

Info

Publication number: JPS6079134U
Application number: JP17157883U
Authority: JP
Inventors: 博行岡崎; 木下　裕雄; 平田　茂雄
Original assignee: 大阪瓦斯株式会社; 新コスモス電機株式会社
Priority date: 1983-11-04
Filing date: 1983-11-04
Publication date: 1985-06-01
Also published as: JPH0131951Y2

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 drawings]

第１図はサンプリング開始時の各ポーリング穴　　　　
−間の相対ガス濃度を示す図、第２図はサンプリング時
間とポーリング穴内のガス濃度との関係を示す図、第３
図には先行技術に係るガス検知装置を説明するための全
体概略構成図である。そして、第４図および第５図は、
本考案に係る高濃度・低濃度両用ガス検知装置の一実施
例を示し、第４図は全体概略構成図、第５図は正面パネ
ルの正面図である。１・・・・・・ガス流入路、２・・・・・・ガス流出路
、３・・・・・・　　　　゛希釈空気流入路、４・・・
・・・三方弁、５・・・・・・ガスバイパス流路、６・
・・・・・余剰ガス排出流路、９・・・・・・逆止弁、
Ｄ・・・・・・希釈装置、Ｐｌ・・・・・・吸引用メイ
ンポンプ、−Ｐ２・・・・・・圧送用補助ポンプ、Ｓ・
・・・・・ガスセンサ　　。 −〇Figure 1 shows each polling hole at the start of sampling.
Figure 2 shows the relationship between sampling time and gas concentration in the poling hole. Figure 3 shows the relative gas concentration between
The figure is an overall schematic configuration diagram for explaining a gas detection device according to the prior art. And, FIG. 4 and FIG. 5 are as follows.
An embodiment of the high-concentration/low-concentration gas detection device according to the present invention is shown, and FIG. 4 is a schematic diagram of the overall configuration, and FIG. 5 is a front view of the front panel. 1... Gas inflow path, 2... Gas outflow path, 3... ゛Dilution air inflow path, 4...
...Three-way valve, 5...Gas bypass flow path, 6.
... Surplus gas discharge channel, 9 ... Check valve,
D...Dilution device, Pl...Main pump for suction, -P2...Auxiliary pump for pressure feeding, S...
...Gas sensor. −〇

Claims

[Scope of utility model registration request]

A state in which the gas inflow path 1 and the gas outflow path 2 are directly communicated between the gas inflow path 1, the gas outflow path 2, and the diluted air inflow path 3, and a state in which the diluted air inflow path 3 and the gas outflow path 2 are A three-way valve 4 is provided for selectively switching between the gas inflow path 1 and the gas outflow path 2 by bypassing the three-way valve 4. In a gas concentration meter that constitutes a dilution device and is provided with a gas sensor S and a sampling gas suction pump P1 in the gas outflow path 2, a sufficient amount of sampling gas is introduced into the gas inflow path 1. A high-concentration/low-concentration gas detection device characterized in that an auxiliary pump P2 that can be introduced under pressure is provided, and an excess gas discharge channel 6 equipped with a check valve 9 is branched out from the middle of the gas inflow channel 1. Device.