公开(公告)号：US4068372A

公开(公告)日：1978-01-17

申请号：US768198

申请日：1977-02-14

申请人： Hideaki Kamohara ,  Toji Nakatui ,  Yuji Yoshitomi ,  Iwao Sasaki ,  Kenji Shimada

发明人： Hideaki Kamohara ,  Toji Nakatui ,  Yuji Yoshitomi ,  Iwao Sasaki ,  Kenji Shimada

IPC分类号： B21D39/06 ,  B21D39/20 ,  B23P17/00

CPC分类号： B21D39/06 ,  B21D39/203 ,  B21D39/206 ,  Y10T29/53122 ,  Y10T29/53987 ,  Y10T29/53996

摘要： Disclosed is a tube expander adapted for use in fixing tubes to a tube plate of a boiler or a multitubular heat exchanger. The expander incorporates an elastic expanding medium adapted to be inserted into a tube to be expanded radially against a wall of a tube-receiving bore of the tube plate. The expander further includes a pressurizing rod passing through the expanding medium, a pressurizing rod head provided at one end of the pressurizing rod, a back-up ring adapted to be supported straddling said tube receiving bore and slidably passed by the pressurizing rod, and seal rings disposed at both sides of the pressurizing rod. The seal rings are made of a hard elastic material of a hardness greater than that of the expanding medium, and each of them is provided with at its portion confronting the end of the expanding medium with a conical recess.

摘要翻译： 公开了一种适于用于将管固定到锅炉或多管式热交换器的管板的管式膨胀机。 膨胀机结合弹性膨胀介质，该弹性膨胀介质适于被插入到管中以径向扩张地抵靠管板的管接收孔的壁。 膨胀机还包括通过膨胀介质的加压杆，设置在加压杆的一端的加压杆头，适于被支撑跨过所述管接收孔并被加压杆可滑动地通过的支撑环，并且密封 设置在加压杆两侧的环。 密封环由硬度大于膨胀介质的硬弹性材料制成，并且它们中的每一个在其与膨胀介质的端部相对的部分处设置有锥形凹部。