Adjustable foundation bolt pre-buried nut structure

Abstract

The invention discloses an adjustable foundation bolt pre-buried nut structure. The adjustable foundation bolt pre-buried nut structure is characterized by comprising a sleeve, a foundation bolt, a buried plate, a concave surface ring, a convex surface ring and a pre-buried nut, wherein the sleeve is integrally welded to the buried plate and is buried in concrete; the ground bolt penetrates through the sleeve to a position below the buried plate; a concave surface ring, a convex surface ring and the buried nut sequentially sleeve the bolt below the buried plate; the outer diameter of the concave surface ring is larger than the inner diameter of the sleeve; a space for the concave surface ring, the convex surface ring and the pre-buried nut to move is preserved below the buried plate; and the inner diameter of the sleeve is larger than the outer diameter of the ground bolt, so that a horizontal displacement space for the foundation bolt exists in the sleeve. By using the structure, position degree deviation and perpendicularity deviation of the foundation bolt pre-buried component can be corrected, so that the phenomenon that equipment interference or reworking is caused when design requirement cannot be met during on-site assembly, so that assembly progress is affected is avoided.

Description

technical field [0001] The invention relates to a fixing device for a ground part of a steam turbine, in particular to an adjustable anchor bolt pre-embedded nut structure. Background technique [0002] The ground-supported bearing housing, low-pressure cylinder, valve bracket and other components in the steam turbine are mainly connected to the foundation through anchor bolts. In addition to the type of anchor bolts that completely penetrate the foundation, in order to avoid the anchor bolts being too long or because there is no installation and operation space at the bottom of the foundation, more types are embedded and fixed at one end of the anchor bolts in the foundation, and the embedded nuts and embedded plates welded together. However, due to factors such as positioning deviation and concrete shrinkage during the foundation grouting process, most of the anchor bolts embedded in the foundation at one end will have a certain degree of deviation in horizontal position ...

AI Technical Summary

Problems solved by technology

However, the power plant does not have the processing capacity of large-scale equipment, and it is often necessary for the power plant to measure the deviation size of the embedded parts, and then the steam turbine manufacturer matches the positioning holes on the equipment according to the measured data, which is time-consuming and laborious, and affects the production progress of the equipment.

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