CN103594308A

CN103594308A - Double-lamp filament X-ray tube

Info

Publication number: CN103594308A
Application number: CN201310600540.9A
Authority: CN
Inventors: 李冬雪; 戴东辉; 高波; 夏海涛; 隋莹莹; 周立涛; 姜淑芳; 卢元成; 孙怀东
Original assignee: DANDONG HUARI SCIENCE ELECTRIC Co Ltd
Current assignee: DANDONG HUARI SCIENCE ELECTRIC Co Ltd
Priority date: 2013-11-25
Filing date: 2013-11-25
Publication date: 2014-02-19

Abstract

The invention provides a double-lamp filament X-ray tube. A cooling device is mounted on an X-ray tube shell. A 1# lamp filament and a 2# lamp filament are mounted at the position of a ray tube cathode in the X-ray tube shell, and a double-target surface anode target is mounted at the position of a ray tube anode. A 1# ray emitting window and a 2# ray emitting window are arranged at the position, corresponding to the head portion of the double-target surface anode target, of the X-ray tube shell. A high-voltage cable is inserted into the power input end in the ray tube shell. Due to the structure of the double lamp filaments and the symmetric target surfaces, the service life of the X-ray tube is prolonged; according to a single-filament working mode, the working window is selected as needed, and therefore the trouble caused by rotating the ray tube can be avoided; an alternate working mode can also be adopted, as a result, symmetric double-station detection is realized, the time ratio of rest to work is increased, heat dissipation time of the anode target is prolonged, and the working performance of the ray tube is maintained.

Description

Two filament X-ray pipes

Technical field

The present invention relates to a kind of X-ray tube, relate to specifically the metal-ceramic X-ray tube of a kind of pair of filament, symmetrical target surface, symmetrical window and double work.

Background technology

In nondestructive testing technique, X-ray tube is different from other assemblies, unrepairable after damaging, and therefore, the life-span of X-ray tube is determining the useful life of defect-detecting equipment, and the ability to work of raising X-ray tube becomes the first element of improvement equipment flaw detection ability.In the useful life of X-ray tube, mainly by following three aspects, determined: filament, target, vacuum.The course of work of X-ray tube is: the free electron that filament heating produces, at high voltage electric field, to accelerate, and bombardment, to target, produces X ray.

The life-span of X-ray tube depends mainly on:

1, can X-ray tube vacuum keep for a long time;

2, whether filament easily blows;

3, whether target can stand long-term high-velocity electrons bombardment.

In x-ray inspection technology, X-ray tube is single filament, single window, single target surface working method at present, ray tube is after having been used a period of time, consumption due to excitation electron, the voltage-current characteristic of filament changes, the landslide that causes ray tube service behaviour, once filament is blown, ray tube lost efficacy, only have and changed new ray tube and just can make equipment rework, increased the cost of equipment; Even if the ray tube of two filamentray structures also exists the same target surface of the long-term bombardment of electron beam, and cause landslide or even the damage of the ray tube performance that the consumption due to target causes.

X-ray tube is power device, and its radiating effect is also most important to the useful life of X-ray tube.

Summary of the invention

The problem existing for the X-ray tube of existing single target surface, single window banging mode, the invention provides a kind of long service life, selects single filament work, selects as required working face, a kind of pair of filament X-ray pipe that needn't rotary irradiating spool.

The concrete technical measures that address the above problem are: a kind of pair of filament X-ray pipe, comprise cooling device, it is characterized in that: cooling device 8 is housed on X-ray tube housing 4, in the position of X-ray tube housing 4 inner rays tube cathodes, 1# filament 1 and 2# filament 2 are housed, two target surface plate targets 3 are housed in the position of ray tube anode, on the X-ray tube housing 4 with two target surface plate targets 3 head opposite position places, be provided with 1# ray

outgoing window

5 and 2# ray outgoing window 6, high-tension cable 7 inserts ray tube housing 4 interior power inputs.

Beneficial effect of the present invention:

(1) two filaments, symmetrical target face structure increase the service life;

(2) single filament working method, according to the window of need of production selection work, the trouble that can avoid rotary irradiating spool to bring;

(3) also can alternation, realize symmetric double station and detect, extend rest working time ratio, extended the heat radiation time of plate target, safeguard the service behaviour of ray tube.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is that the present invention detects workpiece operation principle schematic.

Embodiment

Below in conjunction with accompanying drawing, describe structure of the present invention and operation principle in detail.

A filament X-ray pipe, as shown in Figure 1: cooling device 8 is housed on X-ray tube housing 4, adopts external circulating water-cooled to dispel the heat, also play in addition the effect of x radiation x protection.The problem of filament is fairly simple, and it is high that major requirement material purity is wanted, because when X-ray tube is worked, filament is in consumption.In the position of X-ray tube housing 4 inner rays tube cathodes, 1# filament 1 and 2# filament 2 are housed, two target surface plate targets 3 are housed in the position of ray tube anode, the structure of plate target adopts the mode of " axis full symmetric double-reflecting face ", guarantee that two filaments produce complete living working effect, can also realize the conversion of operating angle simultaneously.In addition on the Material Selection of plate target, adopted tungsten-rhenium alloy as target, tungsten-rhenium alloy has high-melting-point, high strength, high rigidity, high-ductility, high recrystallization temperature and the low premium properties such as plastic brittle transition temperature, use is on X-ray tube plate target, can accept long-term beam bombardment, and a large amount of heat of producing during work of reply and the service behaviour of target of can not changing.On the X-ray tube housing 4 with two target surface plate targets 3 head opposite position places, be provided with 1# ray

outgoing window

5 and 2# ray outgoing window 6, the power input that high-tension cable 7 inserts in ray tube housing 4.According to requirements of one's work, select filament working method, the two ends of vacuum ray tube have been coupled with negative high voltage, 1# filament 1 or 2# filament 2 or two filaments are heated to incandescent state simultaneously, its surface emitting goes out free electron, effect due to the high voltage electric field between negative electrode and anode, and make free electron fly at a high speed two target surface plate targets 3, when running into the prevention of target surface, and between target surface, there is interaction sharply, the kinetic energy overwhelming majority that free electron loses has converted heat energy to, about 1% kinetic energy converts X ray to, from 1# ray

outgoing window

5 or 2# ray outgoing window 6, penetrate, carry out nondestructive inspection operation.

The operation principle of X-ray tube of the present invention is as shown in Figure 2:

1) single filament working method: when 5 work of 1# ray outgoing window, the 6 use lead sealings of 2# ray outgoing window are blocked, now, 1# filament 1 is in running order, 2# filament 2 is in resting state, workpiece is placed on detection line, by motion arrival 1# ray outgoing window 5 positions of streamline, stops and start to detect; After detection, streamline moves on, and the workpiece having detected is advanced and prepares to roll off the production line, and next workpiece to be checked has arrived again detection position.Or 2 work of 2# filament, 1# filament 1 is had a rest, and working method is identical with the former; The advantage of this mode is the useful life that can extend ray tube;

2) rotation working method: 1# ray

outgoing window

5 and 2# ray outgoing window 6 are all opened, 1# filament 1 and 2 alternations of 2# filament, rotation is had a rest, and detection method is identical with single filament working method.During 1 work of 1# filament, detect the 1# workpiece C on 1# detection line A, 2# detection line B transports 2# workpiece D and arrives detecting position simultaneously, 2# filament 2 starts to detect 2# workpiece D, while 1# detection line A transports 1# workpiece C and rolls off the production line, and subsequent workpiece arrives detecting position, so repeatedly alternation.The advantage of this mode is that double is worked simultaneously, has improved the detection efficiency of equipment, has also improved rest and the working time ratio of each filament, can better maintain the serviceability of filament, meanwhile, also makes plate target be had a rest fully and dispel the heat.

Claims

1. a two filament X-ray pipe, comprise cooling device, it is characterized in that: cooling device (8) is housed on X-ray tube housing (4), in the position of X-ray tube housing (4) inner rays tube cathode, 1# filament (1) and 2# filament (2) are housed, two target surface plate targets (3) are housed in the position of ray tube anode, on the X-ray tube housing (4) with two target surface plate targets (3) head opposite position place, be provided with 1# ray outgoing window (5) and 2# ray outgoing window (6), high-tension cable (7) inserts the power input in ray tube housing (4).