In hydraulic fracturing and cementing the formation process, Swivel joint is one of the main parts of the cement truck and a wellhead connection. With this Swivel joint, the pipeline can be linked to each other at any angle, while Swivel joint able to absorb most of the shock pump due to uneven amount produced.
Swivel joint damping effect of its various components such as bearings, seal rings, made a special request. Swivel joint flexibility and strength and bend short tube must be considered together. Swivel joint in order to increase the lifetime and reliability, the need to improve the bearing seal.
Figure l is a new configuration of orange Swivel joint. In order to make a tighter seal ring attached to the sealing surface, packing bevel position than ordinary Swivel joint moved 90 °. This makes the bevel facing the direction of the flow, when the elongation of one meter, bevel becomes softer, thus packing under small pressure (20-50 kg / cm) can be achieved sealed.

Figure 1 High Pressure manifolds Swivel joint
1- threaded elbow; 2- elbow; 3- packing; 4- 10 mm diameter ball; 5- seal ring; 6- bush; 7- tapered seat; 8; short tube; 9- packing 11- coat nuts;; vertebral 10- 12- lids seal ring; 13- butter mouth; 14- bolt; 15- spring pad.
These measures reduce the possibility of abrasive debris falling into the gap between the root and the contact surface.
In the course of using Swivel joint observed, the outer diameter of the sealing ring in the fastest portion of the wear member P (Fig. 1). When the pressure began packing to move B gap and quickly stabbed bad in some parts of P.
To prevent sprint, packing a metal ring assembly (Figure 2). The ring is made of 0.5 mm thick steel plate stamping made of poured into the mill from the above rubber molding.

Figure 2 Swivel joint packing metal ring
1- ring; 2- Rubber
In order to reduce the dirt since the end face (V arrow) into the bearing, bearing fitted in front of the rubber sealing ring, it can be protective dirt into the bearings, bearing wear until so far. When (Figure 3) between the balls and the bearing clearance groove 6 is formed, if a great shock, dirt enters the gap △ Jane connection between the parts, and penetrate the bearing, such as K arrows indicate (Figure 3). Therefore not completely prevent dirt from entering the bearing. After working for the dirt to exclude from the bearing, and Paul, as the normal lubrication of the bearing, the lids with holes 12 and 13 means grease fittings. This butter mouth with the fresh oil is injected into the bearing pressure tank to discharge sewage lubrication. Thus, after each work can reply bearing lubrication, Swivel joint to increase the period of use.

Figure 3 Swivel joint seal packing