Kabushiki Kaisha Kobe Seiko Sho

Yoshiro Tanaka

Kazuo Akagi

Ryujiro Shitamatsu

Tadashi Nishimura

Hayato Moroi

Yukihiko Komatsu

Osamu Tsuge

Noritsugu Fujii

Yutaka Inada

Yukihiko Kamatsu

Coomarasamy Thirulingham

Masaki Miyake

Disclosed is a method of manufacturing briquettes of reduced iron, wherein a residual oil on distillation containing petroleum asphalt or petroleum pitch is sprayed on the surfaces of rolls. The petroleum asphalt or petroleum pitch are thermally cracked into hydrocarbon gas and carbon by the heat (650.degree. to 750.degree. C.) of the reduced ion. This makes it possible to prevent briquettes from sticking on roll pockets, and hence to provide stable operation of the briquette manufacturing apparatus.

Lubricant and method of manufacturing briquette using the same

An apparatus for pickling the inner wall of a tubular member, for example, a zirconium or zircaloy tubular member as a cladding tube for nuclear fuel. The apparatus features the use of ultrasonic instruments for measuring the inner diameter of the tubular member while pickling the inner wall of the same. Owing to the interlocked association of the instruments and mechanism for supplying a pickling liquid into the tubular member, the supply of the pickling liquid can be stopped as soon as the inner diameter has reached a predetermined value. Various mechanisms may also be incorporated in the apparatus to minimize the temperature variation along the length of the tubular member and to improve the accuracy of the measurement by the instruments.

Apparatus for pickling the inner wall of tubular material

A cleaning apparatus for use in pickling facilities for tubular members such as zirconium or zirconium alloy tubes. The apparatus includes a travelling crane for conveying and loading the tubular members from one cleaning tank to another, a pair of endless wrapping connectors such as endless chains spacedly and circulatably provided in at least one tank, for example, in a first cleaning tank filled with slightly warm water below the level of its cleaning fluid, and a plurality of feed claws provided with an interval therebetween on each of the endless wrapping connectors along the length of the same so as to prevent the tubular members from contacting one another during cleaning treatment. Thus, development of stain or physical damage such as scratches or dents is eliminated or minimized. It is possible to tentatively stock the tubular members on the endless wrapping connectors so as to perform a smooth and continuous pickling and cleaning operation of such tubular members.

Cleaning apparatus of tubular materials for use in pickling facilities

An apparatus for continuously pickling the outer surfaces of hermetically plugged tubular members is described. The apparatus includes a plurality of liquid tanks which separately contain different pickling liquids and define through-holes in their respective front and rear walls on at least one common longitudinal line to permit the successive passage of the tubular members therethrough while rotating them around their respective longitudinal axes. The apparatus includes a cleaning tank and cleaning brush unit provided sequentially before the liquid tanks. The cleaning tank includes at least one ultrasonic cleaning oscillator and defines through-holes in the front and rear walls thereof for allowing said tubular members to pass through the cleaning tank and the brush unit. Since any oil, grease or dust can be completely removed by the cleaning tank and brush unit prior to pickling, it is possible to obtain tubular members having excellent outer surface quality.

Apparatus for continuously pickling the outer surfaces of tubular

An apparatus for conveying tubular members along a plurality of treatment liquid tanks in pickling facilities. The apparatus includes a pair of guide rails and a travelling car adapted to reciprocate on the guide rails. The travelling car includes at least one pair of tube-supporting hooks which can be reciprocated upwardly and downwardly and turned between positions parallel to the rails and other positions perpendicular to the rails. The tube-supporting hooks can be lowered or raised independently so as to support the tubular members aslant near the treatment liquid level in each of the treatment liquid tanks, thereby allowing immersion of the tubular members into the treatment liquid or retraction of the tubular members out of the treatment liquid without forming considerable air bubbles in the liquid. Since such bubbles are known to develop stains on the tubular members, tubular members of high surface quality can be obtained. The above apparatus also permits a smooth, simple and efficient conveyance and loading and unloading of tubular members between the treatment liquid tanks.

Growing community of inventors

Shimonoseki, Japan

Yoshiro Tanaka