Checking and verification method of torsional angle of three-branch oblique support arm of radial gate

Abstract

The invention belongs to the technical field of hydropower station engineering, and relates to a checking and verification method of the torsional angle of a three-branch oblique support arm of a radial gate. The following operational formulas are adopted: tan alpha=(L-1) / 2(R-h); L1=theta1'*R pi / 180, L2=theta2'*R pi / 180; sin(theta1 / 2)=sin(theta1' / 2)*cos alpha, sin(theta2 / 2)=sin(theta2' / 2)*cos alpha; tan phi1=sin alpha*tan theta1'; tan phi2=sin alpha*tan theta2'; eta1=arc sin[sin phi1 / (tan theta1*tan alpha)]+ phi 1-90 degrees; and eta2=arc sin[sin phi2 / (tan theta2*tan alpha)]+ phi 2-90 degrees. The checking and verification method disclosed by the invention has the beneficial effects that the deficiency of "Specification for Design of Steel Gate in Hydraulic and Hydroelectric Engineering" SL74-2013 and "Specification for Design of Steel Gate in Hydroelectric Engineering" NB35055-2015 for checking the torsional angle of the three-branch oblique support arm of the radial gate is overcome, and theoretical preparation and reference are provided for making corresponding terms. Major accidents caused by checking mistakes are avoided, and the correctness and the precision of the design, and construction quality are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of hydropower station engineering, and relates to a method for checking and verifying the torsion angle of a trident oblique arm of an arc gate. Background technique [0002] The curved gate is composed of four parts: door leaf, support arm, support hinge (including hinge, hinge shaft, hinge seat, etc.) and water stop device. The main function of the support arm is to connect the door leaf and the hinge, transmit the water pressure on the door leaf panel to the hinge, and the hydraulic structure where the hinge seat is installed. The common inclined arm is composed of upper and lower pillars. Vertical supports and oblique pull rods are arranged at intervals between the pillars to connect the upper and lower arms into a whole, referred to as V-shaped arm. For the oblique support arm of the arc gate, in order to ensure that the support arm's support web and the main beam web of the door leaf are installed on ...

AI Technical Summary

Problems solved by technology

[0009] However, the prerequisite for the use of the "Calculation Formula in Article 6.1.11" of the "Specification" is "the torsion angle 2φ formed on the vertical section of the bisector of the angle between the two arms at the hinge". It is not on the "bisector of the angle between the two arms", and the angles between the upper, middle, middle and lower arms are not equal, which is not suitable for the use conditions stipulated in the specification

Therefore, the result obtained must be wrong

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