Combined mechanical seal device, side-entering agitator and maintenance and replacement method of combined mechanical seal device of side-entering agitator

Abstract

The invention discloses a combined mechanical seal device, a side-entering agitator and a maintenance and replacement method of the combined mechanical seal device of the side-entering agitator. The combined mechanical seal device comprises a mechanical seal stand and a mechanical seal assembly detachably connected with the mechanical seal stand, and further comprises a self-locking cone which is matched with the mechanical seal stand and is close to the mechanical seal assembly. An O-shaped seal ring is arranged on the conical face of the self-locking cone in a clamped mode. In the first state, the conical face of the self-locking cone and the O-shaped seal ring are separated from the conical inner wall of the mechanical seal stand, and a liquid medium is dynamically sealed with the mechanical seal assembly; and in the second state, the conical face of the self-locking cone and the O-shaped seal ring are attached to the conical inner wall of the mechanical seal stand, and static sealing of the liquid medium is achieved. Effective sealing of the side-entering agitator in the operating state and the maintenance state is achieved, the two sealing structures are reasonable and convenient to switch, the service life of components to be sealed can be easily prolonged, online replacement sealing is facilitated, sealing reliability of replacement sealing is improved, and thus reliability of integral equipment is ensured.

Description

technical field [0001] The invention relates to a sealing device, a side-entry agitator using the sealing device and a maintenance and replacement method for the sealing device, in particular to a combined mechanical seal device, a side-entry agitator and a method for repairing and replacing the combined mechanical seal device . Background technique [0002] As the main supporting equipment in petroleum, chemical, food, papermaking, environmental protection and other industries, mixing equipment is widely used in industrial production. Due to its special application occasions, side-entry agitators have great impact on mixing effect and equipment reliability. especially important. [0003] Mechanical seal refers to a device that prevents fluid leakage by at least one pair of end faces perpendicular to the axis of rotation under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of auxiliary seals to keep fit and slide relativ...

AI Technical Summary

Problems solved by technology

[0004] The sealing structure of the side-entry agitator produced by domestic agitator manufacturers usually adopts a double-end mechanical seal, or a single mechanical seal without bearings. The structure of the double-end mechanical seal is relatively complicated. The moving ring is easily damaged. When these mechanical seal structures are damaged in the static ring, moving ring and other parts and need to be replaced, repaired or replaced, the liquid in the tank cannot be effectively sealed, resulting in the problem of liquid leakage.

[0005] The sealing structure of the side-entry agitator produced by international agitator manufacturers is usually located in a deep position in the tank, which is not convenient to observe the operation status of the mechanical seal, and when the mechanical seal is damaged or the parts are damaged, the mechanical seal is difficult to replace , and some are because the internal structure of the mechanical seal is too complicated and inconvenient to disassemble, which makes it difficult to maintain and increases the difficulty of operation

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