Air inflation rubber tire plug used for cast tube coating inserting port end and having automatic compensation sealing effect

Abstract

The invention discloses an air inflation rubber tire plug used for a cast tube coating inserting port end and having an automatic compensation sealing effect. The air inflation rubber tire plug comprises an air inflation rubber tire and an inflating valve. The cross section of the air inflation rubber tire is L-shaped, a cavity in the same shape is arranged in the air inflation rubber tire, the inflating valve is arranged on an outer end face A of the air inflation rubber tire, and the inflation valve is communicated with the cavity of the air inflation rubber tire. During use, the air inflation rubber tire plug is sleeved on an inserting port end of a nodular cast iron pipe, and a plane B and a plane C of the air inflation rubber tire are contacted with end faces of the outer diameter of a ball pipe and the inserting port end respectively. When 0.3-0.5Mpa compressed air is inflated through the inflating valve, the plane B of the air inflation rubber tire is attached to the outer diameter of the ball pipe closely, and the plane C of the air inflation rubber tire is closely sealed with the end face of the inserting port end of the ball pipe. When cement mortar is coated on an inner wall of the ball pipe of the nodular cast iron pipe, a phenomenon of leaking of sand and mortar can not occur, a coating port of the pipe forms a fixed and neat chamfer, and inner coating work of the ball pipe is finished through one step.

Description

technical field [0001] The invention relates to the technical field of rubber products, in particular to a tool used in the production process of cement mortar internally coated with a centrifugal method of a nodular cast iron pipe. Background technique [0002] During the manufacturing process of ductile iron pipes, it is necessary to use high-speed centrifugation to line the inner wall of the pipe with cement mortar. In the past, various types of pneumatic rubber tire plugs used at the socket end were only fixed on the pipe socket end through a metal skeleton, and the sealing effect was not good due to the small contact force. Therefore, sand leakage and slurry leakage are often caused, and the blocked ports are not neat. Like this, the port after interior coating also needs artificial secondary repair, and repair effect is bad, wasted manpower and material resources. Moreover, traditional pneumatic rubber tires also need to be equipped with heavy metal frames when in us...

AI Technical Summary

Problems solved by technology

In the past, various types of pneumatic rubber tire plugs used at the socket end were only fixed on the pipe socket end through a metal skeleton, and the sealing effect was not good due to the small contact force. Therefore, sand leakage and slurry leakage are often caused, and the blocked ports are not neat

In this way, the port after internal coating needs to be manually repaired twice, and the repair effect is not good, which wastes manpower and material resources

Moreover, the traditional pneumatic rubber tire is equipped with a heavy metal frame when it is used, and the labor intensity of the workers is relatively large during operation.

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