Thin-walled stainless steel pipes are widely used in internal or external construction of water, steam and other fluids. These thin-walled stainless steel pipes replace iron and easily corrode copper pipes that cause leakage, and vinyl pipes have lower resistance to cold and hot weather.
The wall thickness of the stainless steel pipe is about one millimeter. Therefore, it is difficult to thread the ends of these thin-walled stainless steel pipes with connecting nuts. For this reason, welding, welding, and double folding interlocks have been used to connect them.
This mechanism consists of a V-shaped ring bead, a pair of diagonally opposed thin-walled stainless steel pipes and a large enough diameter to receive the end supporting surface of the pipe joint sleeve. A male thread and an annular groove are provided on the outer surface and the inner edge of the joint sleeve. The connecting sleeve is installed on the pipe, and it is arranged in the annular groove by the annular seal close to the inclined annular bead. The connecting nut has an annular flange threaded connection sleeve whose inner edge is gradually changed to abut on another inclined surface to connect a pipe joint sleeve.
The installation ring seal of the thin-walled stainless steel pipe is connected in the sealing groove, the pipe joint sleeve is inserted, the conical spring connection sleeve is installed, and the nut is tightened. The annular seal makes it close to the first inclined surface, the surface of the abutment and the sealing groove to prevent fluid leakage in the pipeline. The tapered part, the inclined shoulder part and the annular sealing ring used are composed of annular beads to prevent the pipe in the joint sleeve from falling off.
When the coupling nut threaded joint is sleeved on the supporting surface of the coupling nut and the front of the coupling sleeve, the conical compression spring coupling nut and the central enlarged flange part make the color conical spring invisible, so that the installation procedure can observe the connection The nut is airtight. It is preferable that the side wall of the collar part with the enlarged center is the seam of the upright outer surface, which makes the observation easy.
When the connecting nut is tightened, the front end of the connecting sleeve abuts the connecting nut so that the threaded portion provides a large tensile force increase, which in turn provides a large tightening force and a frictional resistance bearing surface between the threads. In addition, the joint sleeve and coupling nut that are tightly pressed on the ring bead increase the elastic strength of the ring bead to the elastic strength of the annual seal and the conical spring, thereby preventing loose connections due to pipe bending or vibration Nut.
As shown above, the improved traction and durability of the joint mechanism according to the present invention makes it easy to not only connect or connect thin-walled stainless steel pipes only by tightening or loosening the connecting nut, thereby eliminating the need for skilled workers, but also by observing Found a loose joint.