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目前,国内用离心法生产的自应力管大都采用半模生产。这种半模的跑轮采用锥面配合,用钩头螺栓紧固。为防止螺栓的钩头沿圆周方向位移,在跑轮辐面上安装了数对定位螺栓(见图1)。上述锁紧装置虽有结构紧凑,操作灵便,备件制作较简单等优点,但由于钩头螺栓必须与跑轮上两定位螺栓间的空档对位,往往要将沉重的跑轮沿圆周方向多次往复转动,操作程序较复杂,工人劳动强度大,在实际操作中经常发生没有对位的情况。由于钩头螺栓没有定位,在管模高速运转的过
At present, most of the self-stress pipes produced by centrifugal methods in China use half-mold production. This half-mold running wheel adopts a tapered surface and is fastened with a hook bolt. In order to prevent the hook head from displacing in the circumferential direction, several pairs of positioning bolts are installed on the running surface of the running wheel (see Figure 1). Although the above-mentioned locking device has the advantages of compact structure, convenient operation, simple spare parts, etc., but because the hook bolt must be aligned with the neutral position between the two positioning bolts on the running wheel, it is often necessary to have a heavy running wheel in the circumferential direction. The reciprocal rotation, the operation procedure is more complex, the labor intensity of the workers is large, and there is often no alignment during actual operation. Because the hook bolt is not positioned, the high speed operation of the die