Hitachi, Ltd.

Hitachi Construction Machinery Co., Ltd.

Akiomi Kono

Genroku Sugiyama

Tadashi Sano

Norihide Saho

Takeshi Harada

Ryo Miyake

Akira Koide

Yuji Yoshitomi

Akihiko Yamamoto

Wataru Idetsu

A reaction apparatus comprises a first supply flow channel having a fine flow channel cross sectional area for a liquid pressurized by a pressurizing device, a gas supply flow channel having a fine flow channel cross sectional area for supplying a gas, a two-phase flow channel having a fine flow channel cross sectional area in communication with a joined portion for the first supply flow channel and the second supply flow channel for flowing a gas/liquid two-phase fluid, a gas bubble reaction flow channel in communication with the exit of the gas/liquid two-phase channel and having a flow channel cross sectional area larger than that of the gas/liquid two-phase flow channel, and a liquid discharge flow channel for discharging the liquid in the gas bubble reaction flow channel. Therefore, in the reaction apparatus, a stable mixing ratio of a gas to a liquid can be obtained and the mixing speed of the gas to the liquid is increased.

Reaction apparatus and mixing system

Hardened surface layers ( ) and ( ) of a nitride or other compound, which is higher in hardness than dirt or soil, are formed on the inner peripheral surface ( B) of each metal bush ( ) and on the outer peripheral surface ( A) of each connecting pin ( ) which constitute a crawler belt ( ), respectively. In addition, resinous sliding bearings ( ) are fitted in transversely spaced positions on the inner periphery of each metal bush ( ) of the crawler belt. Bearing ( ) is provided with recessed grooves ( ). Accordingly, part of soil or dirt which intrudes into a gap space between an outer link portion ( ) of a track link and a metal bush ( ) through an annular seal member ( ) is trapped on an inner peripheral surface ( A) of the bearing ( ).

Crawler

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Tomobe, Japan

Akiomi Kono