PVC pipe

Abstract

The invention relates to the technical field of building materials, and discloses a PVC pipe. The PVC pipe comprises a rubber layer, a fire protection layer and a PVC layer in sequence from inside tooutside, wherein a plurality of air bags are vertically and fixedly mounted in the fire protection layer along the periphery of the rubber layer; an air passage communicating with the air bags is arranged in the fire protection layer; all the air bags are connected with an anti-blocking mechanism fixed in the rubber layer; the anti-blocking mechanism comprises anti-blocking boxes; a penetration piece and a spring are arranged in each of the anti-blocking boxes; each penetration piece is connected with the corresponding anti-blocking box in a sliding manner; an opening used for allowing each penetration piece to penetrate through is formed in each of the anti-blocking boxes; one end of each of the springs is fixedly connected with the corresponding penetration piece, and the other ends of the springs are fixedly connected with the air bags; a plurality of bulges are arranged on the fire protection layer; the bulges partition the rubber layer into contraction sections, throat pipe sections and diffusion sections; each throat pipe section enables the corresponding contraction section and diffusion section to communicate with each other; an air pipe is arranged in each of the throat pipe sections; one end of each of the air pipes communicates with the corresponding throat pipe section and is higher than the corresponding bulge; and the air passage communicates with the parts, higher than the bulges, of the air pipes. According to the PVC pipe, the structure is simple, a negative pressure is formed through sewage discharge, so that the purpose of preventing the PVC pipe from being blocked is achieved through a series of cooperation.

Description

technical field [0001] The invention relates to the technical field of construction consumables, in particular to a PVC pipe. Background technique [0002] At present, with the development of science and technology, PVC pipes occupy an important position in construction consumables, and are widely used to dredge pipes and sewers. Has gradually replaced metal pipes. [0003] When PVC pipes are used as sewers, PVC pipes are prone to blockage and other problems. When the PVC pipe is blocked, it needs to be unblocked, and the unblocking method is extremely difficult, and it may even damage the PVC pipe or directly replace the entire PVC pipe, which will inevitably increase the use cost of the PVC pipe, and generally the PVC pipe is buried in the wall Yes, it will also damage the building wall when replacing it, which is not worth the candle. There are also PVC pipes that will be exposed to the air if they are not buried. Because PVC pipes are oxidized by air and weathered by ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a PVC pipe

Images