Special device for adjusting splayed opening of underwater expansion bent flange

The invention discloses a special device for adjusting a splayed opening of an underwater expansion bent flange. The device comprises a fastening baffle plate, a stress application base plate, a stress application nut and a tension bolt, the tension bolt is arranged at a gap between two flanges, one end of the stress application bolt penetrates through a bolt hole of one flange and is detachably and fixedly connected with the fastening baffle plate, the stress application nut is located on one side, away from the fastening baffle plate, of one flange and is in threaded connection with the tension bolt, and the stress application base plate is arranged between one flange and the stress application nut. According to the device, the problems that a bolt is difficult to penetrate through the two flanges and the bolt rotates along with a wrench can be solved. 本发明公开了一种用于水下膨胀弯法兰"八字口"调整的专用装置，包括紧固挡板、加力垫板、加力螺母及拉力螺栓，所述拉力螺栓设于两法兰间隙处，所述加力螺栓的一端穿过其中一个法兰的螺栓孔，与所述紧固挡板可拆卸式的固定连接，所述加力螺母位于一个法兰上远离紧固挡板的一侧，并与所述拉力螺栓螺纹连接，所述加力垫板设于一个法兰与所述