CN202153504U

CN202153504U - Superpower large power X-ray ceramic tube

Info

Publication number: CN202153504U
Application number: CN2011202362244U
Authority: CN
Inventors: 盛志华; 盛杰
Original assignee: HUBEI SHENGDA TESTOMG MACHINERY CO Ltd
Current assignee: HUBEI SHENGDA TESTOMG MACHINERY CO Ltd
Priority date: 2011-07-06
Filing date: 2011-07-06
Publication date: 2012-02-29
Anticipated expiration: 2021-07-06

Abstract

The utility model relates to a superpower large power X-ray ceramic tube applied to industrial flaw detection machine, comprising a five-wave ceramic tube sleeve, wherein the upper portion of the five-wave ceramic tube sleeve is provided with a cathode assembly via an outer ring sleeve; the upper end of the cathode assembly is provided with a gas-guide tube which sticks out the exterior of the five-wave ceramic tube sleeve; the lower end of the cathode assembly is provided with a focusing head which is arranged inside the five-wave ceramic tube sleeve; the lower end of the five-wave ceramic tube sleeve is provided with a flange plate; and a cathode assembly is arranged upon the flange plate. The superpower large power X-ray ceramic tube is characterized in that: the internal diameter of the five-wave ceramic tube sleeve is increased to Phi 61.6 mm, with the wall thickness thereof being increased to 13.5 mm; and the distance between the lower end of the focusing head and the central point of the anode target in the anode assembly is increased to 106 mm. The superpower large power X-ray ceramic tube increases the maximum tube voltage of the X-ray ceramic tube from 350kV to 360kV, with the maximum penetrating force being increased from 60mm to 65mm. The superpower large power X-ray ceramic tube is mainly applicable to the flaw detection machines in petroleum, aviation, shipbuilding, and other fields.

Description

A kind of superpower high-power X ray earthenware

The (1) technical field: the utility model relates to the critical piece that uses on the industrial flaw detection machine, especially a kind of superpower high-power X ray earthenware.

The (2) background technology: the topmost application of ray detection is to survey the inner macroscopical geometrical defect (flaw detection) of test specimen, and the radiography method is meant with penetrating the X line or the r ray penetrates test specimen, with the lossless detection method of film as the recorded information equipment.This method is the most basic, most widely used a kind of ray detection method.X ray Non-Destructive Testing (flaw detection) is widely used in Aero-Space, petrochemical industry, shipbuilding, pressure vessel (weld seam) manufacturing industry, auto parts and components, testing of materials, alloy-steel casting etc., and the part quality that all butt welded seam quality have higher requirements detects.Large scale structure equipment, boiler equal pressure container, petrochemical equipment, the portable especially ample scope for abilities of penetrating X line defectoscope of equipment, structural member that inconvenience such as pipeline are moved.The most crucial parts of the used X of penetrating line defectoscope are exactly the X-ray tube that can produce X ray, and the miscellaneous part of x-ray flaw detector all is to be configured according to the performance of X-ray tube and special environment for use.The industrial X-ray pipe that circulates on the market has: glass shell, ceramic package and three kinds of forms of metal shell.Portable industrial X-ray diagnostic machine uses the industrial X-ray pipe of glass and ceramic package, and wherein the ceramic package X-ray tube is because of its intensity is high, volume is little, antidetonation, durable in use, moderate cost are used the most extensively.

X-ray tube is a kind of the two poles of the earth electron tubes.The cathode filament energising is made it incandescent; Electronics is just emitted in a vacuum, if when adding tens voltages to the hundreds of kilovolt (tube voltage) between the two poles of the earth, electronics just quickens to fly from negative electrode anode direction; Obtain very big kinetic energy; When these high-velocity electrons impinge anode,, emit X ray with the outer Coulombian field effect of the nuclear of anode metal atom.The kinetic energy fraction of electronics changes the X ray ability into, and major part changes heat energy into.Electronics is shifted to anode from negative electrode, and electric current is then opposite, moves to negative electrode from anode, and this electric current is called tube current.X ray is when the material, and its intensity weakens gradually, and X ray can make light reaching the film, accepts the more positions of X ray, and the melanism degree is high more after development and photographic fixing, and this effect is called the effect of taking pictures of ray.During x-ray bombardment material to be detected, if there is defective in material internal to be detected, the film density of rejected region can obviously be strengthened.

For industrial X-ray tube, electron energy convert to X ray can efficient be generally 1%, the highlyest be no more than 3%.Tube voltage is high more, electronic kinetic energy is big more; The X ray energy that produces is just big more, so its penetration power is also just high more, the industrial ceramics X-ray tube that can provide on the domestic market at present; Maximum tube voltage is 350kv; Tube current be 5mm. wherein directional solidification ceramics X-ray tube penetration power is higher slightly than circumferential ceramic X-ray tube penetration power, but the highest develop rapidly that also is no more than 60mm. along with industrial society, to ray detector require increasingly high.Detect and require the occasion of the penetration power of checkout equipment at the construction field (site) for a lot of needs, before not higher tube voltage X-ray tube occurs, can only achieve the goal through repeated exposure repeatedly greater than 60mm.Have a strong impact on detection efficiency.

The (3) summary of the invention: it is limited with X ray earthenware penetration power that the purpose of the utility model will solve existing defectoscope exactly, can't satisfy the problem of the high-end requirement of user, and a kind of great power X ray earthenware is provided

The concrete scheme of the utility model: improve to existing ray earthenware; It has five ripples pottery pipe box; Top at five ripples pottery pipe box is equipped with cathode assembly through outer ring set, and the upper end of cathode assembly is provided with the outside that wireway stretches out five ripples pottery pipe box, and the lower end of cathode assembly is provided with the inside that focus head places five ripples pottery pipe box; Lower end at five ripples pottery pipe box is equipped with ring flange; Anode assemblies is housed on ring flange, anode screen guard shield is housed outside the head of anode assemblies, be equipped with on the metal in the junction of ring flange and five ripples pottery pipe box and encircle; It is characterized in that: a, said five ripples pottery pipe box interior through increasing to φ 61.6mm, wall thickness increases to 13.5mm; Plate target central point distance in b, said focus head lower end and the cathode assembly increases to 106mm.

The design principle of the utility model is: carrying out structural analysis to the X ray earthenware can know: the inside of X ray earthenware is too narrow, and the 350kv tube voltage is that its limit is withstand voltage.Improve maximum tube voltage, just must change ceramic structure; Improve maximum peneration power, also will improve electronics kinetic energy before impinge anode.The internal vacuum of known ceramics X-ray tube has reached 10 negative 6Pa.Electronics is after leaving cathode surface; High voltage electric field between anode and cathode quickens (energy of acquisition is decided by tube voltage); Fly to the anode target surface then; In ultra-high vacuum environment, the flying distance of electronics is long more, the speed of its acquisition bigger (the acceleration pipeline that duplet collides very length is exactly this principle).The utility model five ripples pottery X-ray tube lengthening anode stub, the distance of elongating negative electrode and anode target surface has improved the speed of electronics before impinge anode, and then has improved the penetration power of ray tube.The utility model has increased ceramic inner radial space simultaneously, and the inside of improving X-ray tube is withstand voltage; Increase ceramic wall thickness, improved ceramic anti-highfield impact capacity.

The utility model is simple in structure, is easy to realize that its maximum peneration power has reached 65mm (A3), can satisfy user's high-end demand.

The (4) description of drawings:

Fig. 1 is the general structure front view of the utility model.

Among the figure, the 1-wireway, the outer endless tube of 2-, the 3-cathode assembly, the 4-focus head, 5-five ripples pottery pipe box, the 6-anode assemblies, 7-anode screen guard shield encircles 9-ring flange, 10-plate target on the 8-metal.

The (5) embodiment:

Referring to Fig. 1, the utlity model has five ripples pottery pipe box 5, through outer ring set 2 cathode assembly 3 is installed on the top of five ripples pottery pipe box 5; The upper end of cathode assembly 3 is provided with the outside that wireway 1 stretches out five ripples pottery pipe box 5; The lower end of cathode assembly 3 is provided with the inside that focus head 4 places five ripples pottery pipe box 5, in the lower end of five ripples pottery pipe box 5 ring flange 9 is installed, and anode assemblies 6 is housed on ring flange 9; Anode screen guard shield 7 is housed outside the head of anode assemblies 6; Be equipped with in the junction of ring flange 9 and five ripples pottery pipe box 5 and encircle 8 on the metal, particularly: the utility model has increased ceramic inner radial space, and the inside of improving X-ray tube is withstand voltage; The inside diameter D of said five ripples pottery pipe box 5 increases to φ 61.6mm, and wall thickness B increases to 13.5mm; And increase the wall thickness of pottery, improve ceramic anti-highfield impact capacity, the plate target 10 central point distance H in said focus head 4 lower ends and the anode assemblies 6 increase to 106mm, promptly constitute the utility model.

Claims

1. a superpower high-power X ray earthenware has five ripples pottery pipe box, through outer ring set cathode assembly is installed on the top of five ripples pottery pipe box; The upper end of cathode assembly is provided with the outside that wireway stretches out five ripples pottery pipe box; The lower end of cathode assembly is provided with the inside that focus head places five ripples pottery pipe box, in the lower end of five ripples pottery pipe box ring flange is installed, and cathode assembly is housed on ring flange; The cathode screen guard shield is housed outside the head of cathode assembly; Be equipped with on the metal in the junction of ring flange and five ripples pottery pipe box and encircle, it is characterized in that: the internal diameter of a, said five ripples pottery pipe box increases to φ 61.6mm, and wall thickness increases to 13.5mm; Plate target central point distance in b, said focus head lower end and the anode assemblies increases to 106mm.