Tube assembly and its performance measurement method, control rod hydraulic drive system

Abstract

The invention relates to the field of fluid delivery pipelines, and provides a pipe assembly, a performance measurement method thereof, and a control rod hydraulic drive system. The tube assembly includes a first end joint, an intermediate joint, and a second end joint; each of the first end joint, the intermediate joint, and the second end joint includes a joint body, an extension tube, and a joint ball formed on the extension tube At the end of the joint ball, a first through hole communicating with the extension tube is opened axially through the joint ball; a joint cavity is formed inside the joint body, and installation through holes and matching through holes communicating with the joint cavity are formed on both sides of the joint body. The joint ball is rotatably arranged in the joint cavity, the extension tube extends out of the installation through hole, and the first through hole communicates with the matching through hole; the extension tube of the middle joint and the matching through hole pass through the first connecting tube and the first end joint respectively. It communicates with the extension tube of the second end joint. The invention has small dispersion of failure times and high credible movement times, and is applicable to motion displacement compensation of small size, high frequency and large deformation.

Description

technical field [0001] The invention relates to the field of fluid delivery pipelines, in particular to a pipe assembly, a performance measurement method thereof, and a control rod hydraulic drive system. Background technique [0002] When transporting fluid, in order to absorb the dimensional changes of pipelines, conduits, containers, etc. caused by thermal expansion and contraction, or to compensate for the axial, lateral and angular displacement of pipelines, conduits, containers, etc., metal expansion joints are usually used or metal hose. [0003] Taking the control rod hydraulic drive system as an example, the hydraulic drive mechanism is placed in the high temperature, high pressure and irradiation environment in the reactor pressure vessel. Cooperate to realize the step-up, step-down and rod-down functions of the control rod. Wherein, the outer casing of the transmission hydraulic cylinder is fixedly connected with the inner casing of the lifting hydraulic cylinde...

AI Technical Summary

Problems solved by technology

[0004] However, metal expansion joints are generally suitable for motion displacement compensation of large size, low frequency, and small deformation, and cannot meet the motion displacement compensation of small size, high frequency, and large deformation of hydraulic drive mechanisms.

Although the metal hose can satisfy the motion displacement compensation of the hydraulic drive mechanism with small size, high frequency, and large deformation, the number of failures of the metal hose has a large dispersion, and its credible number of motions is 50,000 times, which is difficult to meet. The hydraulic drive mechanism needs more than 300,000 times, or even millions of times of movement

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