Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Patent
1998-12-15
2000-12-12
Simmons, David A.
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
55478, 55480, 55525, 55DIG17, B01D 4600
Patent
active
061592595
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates in general to a filter device for compressed air which has filter means having suitable packings accommodated in sleeves.
BACKGROUND ART
Generally, passages for supplying compressed air to various pneumatically operated components used in various factories and atomic plants, for example, are usually provided with filter devices for removing water and oil contained in the compressed air, for the purpose of protecting the pneumatic components or improving the performance of those components.
One type of such a filter device for compressed air is disclosed in JP-A-5-200217, which is constructed to include two kinds of filter means. Namely, this filter device has first filter means having a suitable first packing accommodated in a sleeve, and second filter means having a suitable second packing accommodated in another sleeve. The first and second filter means are disposed parallel to each other. At one of axially opposite ends of the first and second filter means, there is disposed a manifold which includes an inlet passage portion and an outlet passage portion. The inlet passage portion has an inlet passage formed therein, through which the compressed air is introduced into the filter device. The outlet passage portion has an outlet passage formed therein, through which the compressed air is fed out from the filter device. The inlet and outlet passages communicate with the first and second filter means, respectively. At the other of axially opposite ends of the first and second filter means, there is disposed an enclosed trap chamber having a suitable volume, such that each of the first and second filter means communicates with the trap chamber. The thus arranged first and second filter means, the trap chamber and the manifold are assembled together and fixed to each other by a plurality of bolts which extend through the manifold and which are screwed in the trap chamber. According to this arrangement, the compressed air entering the inlet passage of the manifold is fed into the outlet passage of the manifold through the first filter means, the trap chamber, and the second filter means, whereby an air passage for the compressed air is formed through the filter device.
In the filter device constructed as described above, usually, the first packing of the first filter means is a roll of a wire mesh fabric formed by weaving or knitting stainless steel fibers or other metallic materials, so that vapor and/or liquid particles like water and oil contained in the compressed air are condensed or coalesced as the compressed air passes through the first filter means, while the second packing of the second filter means is a wound fabric mesh formed by weaving or knitting cotton fibers or other materials, so that the liquid particles contained in the compressed air are absorbed or vaporized as the compressed air passes through the second filter means.
Thus, in the filter device disclosed in the above-indicated publication, the vapor and/or liquid particles are condensed or coalesced as the compressed air is introduced into the trap chamber through the inlet passage of the manifold and the first filter means, so that the vapor and/or liquid particles are separated from the compressed air. Further, the compressed air from which the vapor and/or liquid particles have been thus separated is introduced into the second filter means through the trap chamber, so that the amount of the liquid particles remaining in the compressed air is minimized.
The first and second packings constituting the first and second filter means, respectively, are required to be replaced with clean ones when the packings get clogged with dust and/or grease. The replacement requires the following operations.
First, the plurality of bolts serving to connect the first and second filter means, the manifold and the trap chamber into an integral assembly are all removed, and the assembly is disassembled into the four parts. Secondly, the clogged first and second packings which are accommodated in the first an
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Maeda Limited
Maeda Shell Services Co., Ltd.
Prince Fred
Simmons David A.
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