Nodular cast iron pipe jacking method installation steps

(1) Before inserting the socket (socket) into the person, brush the outside of the socket door, the inner surface of the socket and the rubber ring with thick paste of soapy water. (2) After inserting the person, wear the rubber ring on the socket and push it with your fingers to the position where you can gently enter the person. (3) Insert the open ring (divided into 3 arc-shaped pieces) from below in sequence, first install two I below, and then slide H to the direction of the tube axis, and combine it on the top of I. When the 3 arcs of the opening ring are inserted into the socket, if there is a large gap between the arcs and the arcs, a kind of arcs for filling the gap (with the same section, the same material and the thickness of 6mm) is inserted between the arcs of the opening ring. (4) Insert the tightening ring (divided into four arcs) screwed into the bolt from below. In order to prevent the II from falling off, it is secured by a fastener that prevents the upper compression ring from falling off during installation. After installation, due to the rebound of the rubber ring and the arch action of the cement mortar filled between the gland ring and the bottom of the socket, the risk of the upper gland ring falling off no longer exists and can be removed. However, the fixed parts can also be retained, in order to be careful, generally galvanized parts. (5) The part of the bolt of the compression ring (the approximate proportion of 1 of the 3), with a wrench or ratchet wrench reverse rotation, so that it is twisted out of the compression ring 35-40mm degree, thus pushing the rubber ring deep. (6) Install a fixing pin on the flat cap of the bolt head that has not yet been screwed out. (7) Slightly screw out the bolt with the fixing pin, screw the starting bolt once, and install the fixing pin on its head (all bolt installation fixing pin is completed). While paying attention to make the screw out of the gap equal, while all the bolts are screwed out, until the gap between the compression ring and the bottom of the socket reaches the specified length, the installation is complete.