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US 6,139,801 AGranted
Gas collecting apparatus
AssigneeObayashi Corporation
InventorsTakeshi Kawachi, Masahiro Moriya, Yasue Sato
Life of this patent
Estimating the term…
Abstract
The present invention relates to a gas collecting system collecting an inspection objective gas, such as a toxic gas discharged into an ambient air, and particularly to a gas collecting system which can achieve down-sizing of the system and permit implementation of analysis of gas concentration of the inspection objective gas at high precision with simple operation.
Claims55
A gas collecting system comprising:
- a portable air pump which is driven by a portable battery to suck a gas in an inspection objective space;
- a collection vessel, in which a collecting liquid for collecting an inspection objective gas from said gas is filled;
- an induction passage having one end connected to said collection vessel and the other end communicated with said inspection objective space for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- an accumulation body connected to a discharge port of said air pump, accumulating said gas discharged from said air pump and serving as a volumeter;
- drying means disposed between said accumulation body and said collection vessel for drying said gas;
- a pressure switch detecting an internal pressure of said accumulation body;
- a bypass passage connecting said accumulation body to said suction port of said air pump bypassing said collection vessel;
- and
- switching means for switching a flow path connecting said accumulation body to either one of said discharge port of said air pump and said bypass passage, and in conjunction therewith, connecting said discharge port of said air pump to an ambient air opening passage when said accumulation body is connected to said bypass passage.
7 more elements
A gas collecting system comprising:
- a portable air pump which is driven by a portable battery to suck a gas in an inspection objective space;
- a collection vessel, in which a collecting liquid for collecting an inspection objective gas from said gas is filled;
- an induction passage having one end connected to said collection vessel and the other end communicated with said inspection objective space for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- an accumulation body connected to a discharge port of said air pump, accumulating said gas discharged from said air pump and serving as a volumeter;
- drying means disposed between said accumulation body and said collection vessel for drying said gas;
- a pressure switch detecting an internal pressure of said accumulation body;
- a bypass passage connecting said accumulation body to said suction port of said air pump bypassing said collection vessel;
- switching means for switching a flow path connecting said accumulation body to either one of said discharge port of said air pump and said bypass passage, and in conjunction therewith, connecting said discharge port of said air pump to an ambient air opening passage when said accumulation body is connected to said bypass passage;
- a main receptacle box receiving said air pump and said battery therein and having mounting surfaces for mounting said drying means and said collection vessel;
- and
- an auxiliary receptacle box mounted on said main receptacle box, receiving said switching means and said pressure switch therein, and having a mounting portion for detachably mounting said accumulation body, wherein,
- said collection vessel is formed of a transparent material to be used as a color comparison tube, and is also used as a reaction tube filled with reagents reacting with said inspection objective gas,
- said pressure switch detects an internal pressure of said accumulation body reaching a predetermined pressure for outputting a stop signal of said air pump, and
- said accumulation body is a foldable and exchangeable bag.
12 more elements
A gas collecting system comprising:
- a casing covering an inspection objective space in a sealing condition from outside to enclose an inspection objective gas discharged from an inspection object enclosed therein;
- a sampling port provided with said casing to sample a gas containing said inspection objective gas in said casing;
- an air pump sucking said gas from said inspection objective space in said casing;
- a supply port provided with said casing for supplying a reference gas into said casing depending upon suction of said gas in said casing by said air pump;
- a collection vessel, in which a collection liquid for collecting said inspection objective gas from said gas is filled;
- an induction passage having one end connected to said collection vessel and the other end connected to said sampling port for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- an accumulation body connected to a discharge port of said air pump, accumulating said gas discharged from said air pump and serving as a volumeter;
- a capillary passage disposed between said sampling port and said accumulation body for lowering flow velocity of said gas sucked;
- drying means disposed between said accumulation body and said collection vessel for drying said gas;
- a pressure switch detecting an internal pressure of said accumulation body;
- a bypass passage connecting said accumulation body to said suction port of said air pump bypassing said collection vessel;
- and
- switching means for switching a flow path connecting said accumulation body to either one of said discharge port of said air pump and said bypass passage, and in conjunction therewith, connecting said discharge port of said air pump to an ambient air opening passage when said accumulation body is connected to said bypass passage, wherein,
- said casing has an opening in a bottom portion, on which a packing for fitting said casing with said inspection object in gas-tight fashion is provided,
- a filter is connected to said supply port, and said reference gas is an ambient air purified by said filter.
13 more elements
A gas collecting system comprising:
- a casing covering an inspection objective space in a sealing condition from outside to enclose an inspection objective gas discharged from an inspection object enclosed therein;
- a sampling port provided with said casing to sample a gas containing said inspection objective gas in said casing;
- an air pump sucking said gas from said inspection objective space in said casing;
- a collection vessel filled with a collecting liquid for collecting said inspection objective gas from said gas;
- an induction passage having one end connected to said collection vessel and the other end connected to said sampling port for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- an accumulation body connected to a discharge port of said air pump, accumulating said gas discharged from said air pump and serving as a volumeter;
- drying means disposed between said accumulation body and said collection vessel for drying said gas;
- a pressure switch detecting an internal pressure of said accumulation body;
- a bypass passage connecting said accumulation body to said suction port of said air pump bypassing said collection vessel;
- switching means for switching a flow path connecting said accumulation body to either one of said discharge port of said air pump and said bypass passage, and in conjunction therewith, connecting said discharge port of said air pump to an ambient air opening passage when said accumulation body is connected to said bypass passage;
- an internal pressure maintaining bag provided in said casing and having expandability and sealing ability;
- a pressure induction passage connected to said internal pressure maintaining bag through said casing and introducing a pressure adjusting gas for expanding said internal pressure maintaining bag according to lowering of the internal pressure of said casing;
- a volume varying bag provided in said casing and having expandability and sealing ability;
- and
- a gas supplying and discharging passage connected to said volume varying bag through said casing, for supplying and discharging a volume adjusting gas to said volume varying bag for varying volume in said casing by expanding and deflecting said volume varying bag.
13 more elements
A gas collecting system comprising:
- a casing covering an inspection objective space in a sealing condition from outside to enclose an inspection objective gas discharged from an inspection object enclosed therein;
- a pair of gas circulating ports provided with said casing and circulating a gas through said casing;
- an air pump sucking said gas containing said inspection objective gas from said inspection objective space in said casing;
- a collection vessel, in which a collection liquid collecting said inspection objective gas from said gas is filled;
- an induction passage having one end connected to said collection vessel and the other end connected to one of said gas circulating ports of said casing for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- a buffer disposed between a discharge port of said air pump and the other of said gas circulating ports of said casing to buffer a gas pressure by temporarily storing said gas discharged from said air pump, and in conjunction therewith, to circulate said gas to said casing again;
- and
- humidity adjusting means disposed between said buffer and said collection vessel for adjusting a humidity of said gas circulated to be constant.
6 more elements
A gas collecting system comprising:
- a casing covering an inspection objective space in a sealing condition from outside to enclose an inspection objective gas discharged from an inspection object enclosed therein;
- a pair of gas circulating ports provided with said casing to circulate a gas through said casing;
- an air pump sucking said gas containing said inspection objective gas from said inspection objective space in said casing;
- a collection vessel filled with a collection liquid for collecting said inspection objective gas from said gas;
- an induction passage having one end connected to said collection vessel and the other end connected to one of said gas circulating ports of said casing for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- a buffer disposed between a discharge port of said air pump and the other of said gas circulating ports of said casing to buffer a gas pressure by temporarily storing said gas discharged from said air pump, and in conjunction therewith, to supply said gas to said casing again;
- and
- humidity adjusting means disposed between said buffer and said collection vessel for adjusting a humidity of said gas circulated to be constant, wherein
- said casing has an opening in a bottom portion, on which a packing for fitting said casing with said inspection object in gas-tight fashion is provided,
- said collection vessel is formed with transparent material to be used as a color comparison tube, and is also used as a reaction tube to be filled with reagents reacting with said inspection objective gas,
- said buffer is a bag to be expanded and deflected depending upon a difference between a pressure of said gas stored therein and an ambient air pressure, and
- said humidity adjusting means is a container filled with a humidity adjusting liquid prepared by a salt solution for adjusting humidity of said gas.
10 more elements
A gas collecting system comprising:
- a casing covering an inspection objective space in a sealing condition from outside to enclose an inspection objective gas discharged from an inspection object enclosed therein;
- a pair of gas circulating ports provided with said casing and circulating a gas through said casing;
- an air pump sucking said gas containing said inspection objective gas from said inspection objective space in said casing;
- a collection vessel filled with a collection liquid collecting said inspection objective gas from said gas;
- an induction passage having one end connected to said collection vessel and the other end connected to one of said gas circulating ports of said casing for introducing said gas into said collection vessel;
- a suction passage having one end connected to said collection vessel and the other end connected to a suction port of said air pump for introducing said gas in said collection vessel into said air pump;
- a buffer disposed between a discharge port of said air pump and the other of said gas circulating ports of said casing to buffer a gas pressure by temporarily storing said gas discharged from said air pump, and in conjunction therewith, to circulate said gas to said casing again;
- and
- humidity adjusting means disposed between said buffer and said collection vessel for adjusting a humidity of said gas circulated to be constant, wherein
- said casing has an opening in a bottom portion, on which a packing for fitting said casing with said inspection object in gas-tight fashion is provided,
- said buffer is a bag to be expanded and deflected depending upon a difference between a pressure of said gas stored therein and an ambient air pressure,
- said humidity adjusting means is a container filled with a humidity adjusting liquid prepared by a salt solution for adjusting humidity of said gas,
- said collection vessel is provided in plural and in parallel, said collection vessels being formed with transparent material to be used as a color comparison tube, and being also used as a reaction tube to be filled with reagents reacting with said inspection objective gas, and
- switching device is disposed between said collection vessels and one of said gas circulating ports of said casing to selectively communicate said casing with either one of said collection vessels according to time counted.
11 more elements
Dependencies are inferred from the claim text.