Hitachi, Ltd.

The Tokyo Electric Power Company, Incorporated

Toshimasa Shimada

Katsumoto Otake

Yasuo Fujitani

Yoshio Sumiya

Katsuhei Tanemura

Shigeo Oda

A device for cleaning inner surfaces of heat exchanger tubes including a pair of main cleaning device bodies each having a moving device and a brush driving device disposed on opposite tube plates on which each opened end of the heat exchanger tubes is disposed. At least one of the pair of main cleaning devices is provided with a cleaning brush changing device, and each brush driving devices is made to correspond to the opened end of the same heat exchanger tube so that pressurized fluid is alternately supplied to each of the corresponding brush driving device from a pressurized fluid supplying unit and thereby the cleaning brush is moved. As a result of this, only one cleaning brush can clean a multiplicity of heat exchanger tubes. Furthermore, since a brush changing device is provided, the cleaning brush can be at need replaced by fresh one so that a further number of heat exchanger tubes can be cleaned.

Growing community of inventors

Chofu, Japan

Toshimasa Shimada