Toyo Engineering Corporation

Takayuki Kaneko

Kazumi Shima

Hideaki Yanaru

Mitsuo Okada

Jun Zamma

Yuichi Fujita

Yoshinori Nishimura

Youichi Nakajima

Tohru Numaguchi

Sadami Ninagawa

A valve including rotor means of which position is rotatably fixed within tubular flowpassage means; rotating magnetic field generating means fixedly positioned around said rotor means; first screw means which are rotated coaxially with the rotor means together with the latter; second screw means which engage the first screw means and are movable in an axial direction of the screw without being rotated for itself by the rotation of the first screw means; valve body means connected to the second screw means; and valve seat means in engagement with the valve body means, whereby the rotor means are rotated by the action of the rotating magnetic field generated by the rotating magnetic field generating means, said rotation causes the second screw means to be moved in an axial direction of the screw, and said movement is transmitted to the valve body to adjust a degree of opening and closing of the valve.

Valve

Tubes are positioned in a shell of a heat exchanger, hot fluid flowing through the tubes. An inlet of each of the tubes for hot fluid is opened to a separate section which is provided with a clearance from a thick tube sheet secured to the shell. An inlet and outlet port of each of the tubes are positioned alternately at the tube sheet. By the provision of the separate section and alternate positioning of inlets and outlets of tubes, thermal stress arising in the thick tube sheet is made very small.

Heat exchanger with U-tubes

A waste heat boiler which comprises a water chamber and a water vapor chamber, both surrounded by an opposed pair of tube plates, respectively, and a plurality of double tubes extending across the two chambers. The inner tubes within the double tubes are adapted to pass hot waste gases therethrough, while annular spaces defined between the inner and outer tubes within the double tubes are for directing water to be heated therethrough. At least one end area of the double tubes is of triplicate structure so that thermal stresses generated from thermal expansion of the tube elements may be absorbed effectively.

Waste heat boiler

Growing community of inventors

Chiba, Japan

Takayuki Kaneko