A special hoisting tool for installing the ash lock lower valve of Lurgi gasifier

Abstract

The invention discloses a special hoisting tool for mounting an ash lock lower valve of a Lurgi gasification furnace. The special hoisting tool comprises a cross-shaped supporting frame, and lifting lugs which are arranged on the cross-shaped supporting frame and symmetrically arranged; the circle center of the cross-shaped supporting frame is provided with a supporting steel pipe; a circular supporting plate is arranged at the top of the supporting steel pipe; locking nuts are arranged at the circle centers where the circular supporting plate and the circular supporting plate are connected with the cross-shaped supporting frame; and single-end bolts penetrate into the locking nuts. The special hoisting tool has the effects that a valve head can be locked so that the valve head is in tight contact with a hanger; and the axial and radial positions of the valve head are fixed so that a phenomenon that a sealing surface is damaged because the collision occurs in a hoisting process is prevented, and the condition that valve rod groove holes deviate and cannot be in butt joint also can be avoided. The axial position of the valve head can be adjusted according to readings of a scale rule so that the valve rod and an inner swinging rod are paired and the operation is relatively accurate. The device has a reasonable structure, the hoisting process is safe and reliable, the installation difficulty is extremely reduced and the overhauling schedule is accelerated; and meanwhile, the safety of equipment and workers is guaranteed and occurring of accidents is prevented.

Description

Technical field [0001] The invention relates to the field of parts assembly in the process of equipment installation and inspection and maintenance, in particular to a special tool for lifting the ash lock valve of a Lurgi gasifier. Background technique [0002] At present, during the initial installation or maintenance of the ash lock of the Lurgi gasifier, the lower valve of the ash lock is hoisted by the method of simultaneously hoisting the valve head (rod) and the valve seat. The valve seat is lifted by a chain hoist during the hoisting process. The valve seat supports the valve head (rod), and the assembly is mainly based on the position of the internal transmission mechanism of the gray lock. Because there is no radial displacement restriction between the valve head (rod) and the valve seat, the valve rod and the swing rod in the transmission mechanism are The swing head cannot be accurately assembled (the assembly side clearance: only 1mm), and it is difficult to hoist in...

AI Technical Summary

Problems solved by technology

[0002] At present, the ash lock of the Lurgi gasifier is in the initial installation or inspection and maintenance. The hoisting of the valve under the ash lock adopts the method of hoisting the valve head (rod) and the valve seat at the same time. During the hoisting process, the valve seat is lifted by a chain hoist The valve seat supports the valve head (rod), and is mainly assembled according to the position of the internal transmission mechanism of the gray lock. Since there is no radial displacement limitation between the valve head (rod) and the valve seat, the valve stem and the swing rod in the transmission mechanism The swing head cannot be assembled accurately (the gap between the assembly side is only 1mm), and due to the limitation of the distance between the valve seat and the lower valve flange of the ash lock, it is difficult to hoist it in place at one time. installed in place

Moreover, because the chain hoist cannot directly hang the valve stem, but hangs the lower valve seat to support the valve head for installation, and the valve stem and the valve seat cannot be fixed, the valve stem is easy to fall off during the hoisting process, causing the valve head and valve seat Tungsten carbide ring sealing surface damage and personal injury accidents

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