Measurement device for measuring plate spring compressive force of fuel assembly

Abstract

The present invention discloses a measurement device for measuring the plate spring compressive force of a fuel assembly. The device comprises an outer pipe, an upper support mechanism, a driving mechanism, a core rod and a compressive force measurement mechanism. The outer pipe is of a hollow structure. The upper support mechanism comprises a support seat and a hanging bracket. The driving mechanism is arranged on the support seat. The driving mechanism drives the outer pipe to rotate. The core rod is connected with a handle. The compressive force measurement mechanism comprises a screw rod, a screw rod nut, a mounting plate, a positioning pin, a pressing plate, a clamping plate, a pressure sensor and a display. The screw rod is in butt joint with the outer pipe. The screw rod nut is arranged on the mounting plate. The screw rod penetrates through the screw rod nut. The positioning pin is elastically connected with the mounting plate and penetrates through the pressing plate. The core rod penetrates through the outer pipe and the pressing plate to be detachably connected with the clamping plate. A shaft sleeve is arranged on the core rod to stop the pressing plate from sliding downwardly and vertically. The pressure sensor is arranged on the mounting plate to be electrically connected with the display. During the measurement process, a plate spring is clamped between the clamping plate and the pressing plate, so that the interference of external forces is avoided. The measurement device is accurate and reliable in measurement, and simple and practical in structure.

Description

technical field [0001] The invention relates to a measuring tool for a fuel assembly, in particular to a measuring device for measuring the compression force of a leaf spring in an upper pipe seat of a fuel assembly. Background technique [0002] The spring pressure testing machine adopts a double-space floor-standing structure, the upper space is stretched, and the lower space is compressed and bent. The host part is composed of four columns, upper beams, middle beams, and workbenches to form a floor-standing frame. The speed control system is installed at the lower part of the workbench. The AC servo motor drives the ball screw to rotate through the synchronous toothed belt deceleration system. The ball screw drives the The beam drives the tensile attachment to move up and down to realize the loading and unloading of the sample; the spring pressure testing machine with this structure is complex and cannot work underwater, so it cannot be applied to the fuel assembly in the...

AI Technical Summary

Problems solved by technology

The main machine part is composed of four columns, upper beams, middle beams, and workbench. The beam drives the tensile attachment to move up and down to realize the loading and unloading of the sample; the spring pressure testing machine with this structure is complex and cannot work underwater, so it cannot be applied to the fuel assembly in the spent fuel pool. The compression force (ie: elastic force) of the leaf spring of the upper tube seat is measured

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