Introduction of PVC spiral muffler pipe 1. Construction method and precautions (1) Processing of pipe material After determining the required length of the pipe, a hacksaw can be used to cut the saw by hand, or a circular saw blade or a cut saw on an aluminum bed can be used. After cutting is completed, both ends of the pipe must be kept flat, using butterfly tools to remove burrs, and chamfering treatment. Note that the chamfering angle should not be too large. (2) Bonding of pipe and pipe fittings Before connecting, it is necessary to accurately measure the length of the straight pipe that should be inserted into the pipe fitting socket, and make a clear mark on the straight pipe. Next, install the cover and pressure ring first, then insert the riser into the pipe fitting socket, load the film and tighten the cover, and then it can be directly put into use. ( 3) Installation points During the installation process, special attention should be paid to the placement direction of the rubber pressure ring. At the same time, if the height of each layer of the riser is within 3 meters, it is recommended to set up a pipe hoop. 2. Scientific test PVC spiral muffler The inner cavity of the pipe is equipped with a reasonably designed guide rib structure. According to scientific principles, the rotation angle of the guide rib is precisely designed (for example, the right-handed thread lift angle is designed as α