Flexible seal coal powder injection ball valve

Abstract

The invention discloses a flexible seal coal powder injection ball valve. The ball valve comprises a valve body, a valve cover and a sphere, and further comprises an insert, a sealing ring supportingring, an air bag, an air valve and a sealing ring. The insert comprises a concave torus, and the concave torus is of the step structure and integrated with a step-shaped structure. One end of the step-shaped structure is in contact with the valve body. The concave torus is in contact with the inner side surface of the valve cover. The sealing ring supporting ring is a circular annular half-ring surface, the outer sphere surface of the sealing ring supporting ring is in contact with the insert and the valve cover in a sliding mode, the head of the sealing ring supporting ring is loaded with thesealing ring, and the side surface of the sealing ring supporting ring is loaded with an O-shaped sealing ring. The sealing ring is opposite to the sphere. The air bag is a ring type sealing body made of rubber, the air bag is loaded with the air valve, and the air bag is loaded between the valve cover and the sealing ring supporting ring. The valve cover and the valve body are connected to forma valve inlet and outlet end face. The valve body is provided with a structure for removing dust accumulation in a valve body cavity, and the structure is through holes arranged on the left and rightbodies of the valve body. The flexible seal coal powder injection ball valve has the advantages of simple structure, reliable operation and long service life.

Description

technical field [0001] The invention relates to a pulverized coal injection ball valve. Background technique [0002] For the pulverized coal valve used in blast furnace pulverized coal injection, the sealing material between the ball and the valve body is a sealing material mixed and pressed by polytetrafluoroethylene, glass fiber, graphite, copper powder, polyphenylene resin and other materials. Usually, the sealing ring is embedded in the sealing ring groove of the valve seat to form a sealing structure between the ball and the valve body. This kind of sealing is through the pressure generated by the pre-compressed spring, pushing the sealing ring to contact the valve ball to form a seal. After a period of application of the valve with this structure, due to the wear of the sealing ring or insufficient spring pressure, the valve will leak, and a large amount of coal ash will accumulate outside the ball, resulting in an increase in the opening and closing torque of the va...

AI Technical Summary

Problems solved by technology

After a period of application of the valve with this structure, due to the wear of the sealing ring or insufficient spring pressure, the valve will leak, and a large amount of coal ash will accumulate outside the ball, resulting in an increase in the opening and closing torque of the valve. In severe cases, it will be stuck and affect the normal operation of the valve

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