CN100485819C

CN100485819C - Superconducting Tokamak nuclear fusion vacuum chamber window neck-pipe structure

Info

Publication number: CN100485819C
Application number: CNB200610040635XA
Authority: CN
Inventors: 武松涛; 宋云涛; 姚达毛
Original assignee: Institute of Plasma Physics of CAS
Current assignee: Institute of Plasma Physics of CAS
Priority date: 2006-05-18
Filing date: 2006-05-18
Publication date: 2009-05-06
Anticipated expiration: 2026-05-18
Also published as: CN1851830A

Abstract

This invention discloses a window neck tube structure of a special superconductive Tokamak nuclear fusion device vacuum chamber, including a shell of the vacuum chamber, in which, the chamber includes a level window and a vertical window installed with neck tubes on them characterizing that said neck tubes have two sections of ripple tubes and a hard tube between the two sections of ripple tubes, thus the chamber can absorb heat distortion effectively and the neck tube keeps linearity along the axial direction so as to guarantee the normal work of some diagnosis devices.

Description

The window neck-pipe structure of superconducting Tokamak nuclear fusion vacuum chamber

Technical field

The invention belongs to a kind of parts of superconducting Tokamak nuclear fusion device, specifically is a kind of horizontal window of special superconducting Tokamak nuclear fusion device and the neck-pipe structure of vertical window.

Background technology

The superconducting tokamak device vacuum chamber is structural design and all comparatively complicated ultra high vacuum container of processing technology in the present same device, be one of " heart " parts of device main frame, it is the direct place of plasma operation, it relates to electric physics, plasma physics, machinery, subject such as vacuum and mechanics, according to the Physical Experiment demand, have a lot of levels and vertical window up and down on the vacuum chamber body, be used for diagnosis, heating, bleed, inflation, cooling etc., a kind of common feature of these windows is exactly that the window end face of flange is all far from the device center, and the running temperature of vacuum chamber body construction is 1008 ℃, its window outer neck pipe is subjected to the influence of the thermal stress of vacuum chamber system, the heat absorption bending takes place easily, thereby causes especially optical system cisco unity malfunction of some diagnostic devices.

Summary of the invention

The present invention proposes a kind of window neck-pipe structure of special superconducting Tokamak nuclear fusion vacuum chamber, design feature according to superconducting tokamak device, take into full account loading characteristic, take to have the neck-pipe structure of two spacer segment corrugated tubes, make vacuum chamber and after operation the time is heated, both can effectively absorb thermal deformation, window neck-pipe still keeps rectilinearity vertically, thereby has guaranteed particularly optical system operate as normal of some diagnostic devices, is unlikely to measure light path skew plasma.

Technical scheme of the present invention is as follows:

The window neck-pipe structure of special superconducting Tokamak nuclear fusion vacuum chamber, include the vacuum chamber housing, horizontal window and vertical window are arranged on the vacuum chamber, on described horizontal window and the vertical window neck tube is installed, it is characterized in that two sections corrugated tubes are arranged on the described neck tube, between two sections corrugated tubes hard tube is arranged.

10 node of every section corrugated tube, corrugated tube thickness is 1mm, hard tube length is got 200mm.

Because the length of window neck-pipe is long, and its ratio of rigidity vacuum chamber body is little, the vacuum chamber housing passes through mutually under the loadings such as being in atmospheric pressure, electromagnetic force, baking thermal stress with window neck-pipe and will produce bigger bending stress like this, in order to absorb thermal deformation, reduce the stress that vacuum chamber and neck tube pass through the place mutually, consider from structural design, be respectively equipped with two sections corrugated tubes, and between two sections corrugated tubes, be provided with one section hard section neck tube at each horizontal window and vertical window.This structure can realize the large scale parallel offset of the main up and down hard section axis of window on the one hand, can effectively reduce the wave number of corrugated tube on the other hand, reduce the probability factor of vacuum breaking, the more important thing is the deflection that can reduce corrugated tube, thereby reduce the maximum stress value on the corrugated tube.The present invention can make vacuum chamber and both can effectively absorb thermal deformation after operation the time is heated, and window neck-pipe still keeps rectilinearity vertically, thereby has guaranteed particularly optical system operate as normal of some diagnostic devices, is unlikely to measure light path skew plasma.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a bellows structure synoptic diagram of the present invention.

Distressed structure compares synoptic diagram to pre-structure to Fig. 3 with being heated afterwards for neck tube of the present invention is heated.

Embodiment

Referring to accompanying drawing.

Horizontal window and vertical window are arranged on the superconducting Tokamak nuclear fusion vacuum chamber housing, neck tube 1 is installed on described horizontal window and the vertical window, it is characterized in that having on the described neck tube between 2, two sections corrugated tubes 2 of two sections corrugated tubes hard tube 3 is arranged.Every section corrugated tube 2 has 10 node, and corrugated tube 2 thickness are 1mm, the hard tube 3 long 200mm that get.

The optimization of hard tube length between the window neck-pipe corrugated tube:

Every section corrugated tube of vertical window is got 10 node, set up the window neck-pipe finite element analysis model, the window end face of flange is full fixed constraint, neck tube and vacuum chamber the housing place of passing through mutually add displacement boundary conditions according to 250 ℃ of bakings of vacuum chamber thermal deformation situation (along the displacement of big ring radial direction are 15mm, is 15mm along the window neck-pipe direction to top offset), the hard segment length of computation optimization then.

Concrete optimization result is as shown in table 1.From result of calculation as can be seen corrugated tube node number get 10, it is more reasonable that hard tube length is got 200mm.

The hard segment length of table 1 vertical window is optimized the result

Hard tube length (mm)	100	150	200
Hard tube length (mm)	100	150	200	Maximum stress (MPa)	671	511	422.7

When hard tube length is got 200mm, the stress maximal value is 422.7MPa, these stress mainly cause owing to the vacuum chamber baking produces thermal deformation, therefore all belong to the secondary stress scope, its value is all less than the stainless permissible stress 147MPa of 3 times 316L, so think that these corrugated tube syndeton schemes are safe, rational.

Claims

1, the window neck-pipe structure of superconducting Tokamak nuclear fusion vacuum chamber, include the vacuum chamber housing, horizontal window and vertical window are arranged on the vacuum chamber, on described horizontal window and the vertical window neck tube is installed, it is characterized in that two sections corrugated tubes are arranged on the described neck tube, between two sections corrugated tubes hard tube is arranged, 10 node of every section corrugated tube, corrugated tube thickness is 1 millimeter, and hard tube length is got 200 millimeters.