Joint sealing structure for ductile cast iron pipes

Abstract

The invention discloses a joint sealing structure for ductile cast iron pipes. The joint sealing structure comprises a ductile cast iron pipe insert, a ductile cast iron pipe socket and a rubber seal ring, wherein the inner surface of the ductile cast iron pipe socket is provided with a first annular groove in which the rubber seal ring is embedded, the thickness of the rubber seal ring is more than the depth of the first groove, the outer surface of the rubber seal ring is provided with a bump, the surface of the first groove is provided with a second groove matched with the bump on the outer surface of the rubber seal ring, and the surface of the rubber seal ring contacting with water in a pipe is a V-shaped concave surface. The joint sealing structure is simple in structure and easy to mount; meanwhile, the surface of the rubber seal ring contacting with water in the pipe is the V-shaped concave surface such that the sealing effect is reinforced by the water pressure, and thus the problem that the joint of the ductile cast iron pipes is leaking water with high water pressure is overcome. At the same time, the production technology and the production process are greatly simplified, and the productivity is increased while the quality of the rubber ring is improved.

Description

technical field [0001] The invention relates to an interface sealing structure of a ductile iron pipe. Background technique [0002] The joint of the ductile iron pipe uses the self-sealing effect of the rubber ring to keep the joint sealed. Since the contact surface between the rubber ring of the T-shaped structure and the water in the pipe is a circular convex surface, the sealing effect is poor, especially when the water pressure in the pipe increases. , prone to leakage, resulting in water loss and water pollution. At the same time, the currently used T-shaped rubber ring is composed of soft rubber and hard rubber. The hardness of soft rubber and hard rubber is different, the production process is complicated, and the production is difficult, which affects the product quality, and then affects the safety and stability of the seal. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an interface sealing structure...

AI Technical Summary

Problems solved by technology

[0002] The joint of the ductile iron pipe uses the self-sealing effect of the rubber ring to keep the joint sealed. Since the contact surface between the rubber ring of the T-shaped structure and the water in the pipe is a circular convex surface, the sealing effect is poor, especially when the water pressure in the pipe increases. , prone to leakage, causing water loss and water pollution

At the same time, the currently used T-shaped apron is composed of soft rubber and hard rubber. The hardness of soft rubber and hard rubber is different, the production process is complicated, and the production is difficult, which affects the product quality, and then affects the safety and stability of the seal.

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