CN101504905B - X ray generating device - Google Patents

Abstract

To provide an X-ray generator surely fixing an X-ray tube in a protection case. In an X-ray generator 1, a fixing nut 30 is fastened by screwing an outer screw part 30a of the fixing nut 30 into a female screw part 29 formed on a wall face of an opening 26 in a state that an output window holding part 12 of an X-ray tube 8 is inserted into the opening 26 of a front panel 5. By sufficiently fastening the fixing nut 30, a flange part 18 disposed at the holding part 12 of the X-ray tube 8 is abutted on a projected part 27 disposed on the panel 5, as the result, the flange part 18 is pressed toward the projected part 27 by the fixing nut 30 and the X-ray tube 8 is fixed to the panel 5. Further, since the thermal conductivity from the holding part 12 of the X-ray tube 8 to the panel 5 is enhanced and the heat of the X-ray tube 8 is made easy to radiate by using the fixing nut 30 having thermal conductivity, the generation efficiency of the X-ray can be maintained and a breakage of the X-ray tube 8 can be prevented.

Description

X-ray generator

(the application be the denomination of invention submitted on May 13rd, 2004 dividing an application) for the application 200410043563.5 of " X-ray generator "

Technical field

The X-ray tube that the present invention relates to be used in the X ray that static removes etc. is contained in the X-ray generator in the protection container.

Background technology

As an example of the X-ray tube that always exists, see the special fair 7-50594 communique of patent announcement of Japan.In the X-ray tube that this communique discloses, behind the filament heating power, electron beam penetrates, and this electron beam with the high speed impact target, penetrates this material intrinsic X ray from target by focusing on acceleration such as grids.Then, this X ray penetrates to the outside in the X ray penetrating window in target the place ahead from being spaced apart.This class X-ray tube is owing to be in the condition of high temperature, and its cooling is by to being fixed in target, carrying out the natural air cooling from the outstanding scoring ring of peripheral device (vacuum tube) and realize.Like this,, keep the luminous efficiency of X ray, prevent the breakage of target by the cooling of X-ray tube.Again, this class X-ray tube can be in the voltage generating unit be contained in the protection container.In addition, as an example of the X-ray tube that always exists, can enumerate the flat 10-106463 communique of Japan Patent Publication Laid-Open, the flat 6-251735 communique of Japan Patent Publication Laid-Open, reach No. the 4384360th, U.S. Patent bulletin.

In the X-ray tube of target and X ray penetrating window divergence type, peripheral device itself is big, for realizing the natural air cooling, around peripheral device big space need be arranged, and its result causes protecting container to maximize.On the contrary, have the X-ray tube of the output window maintaining part that target and X ray penetrating window (output window) is integrally formed, owing to be small-sized, thereby the diameter of peripheral device (vacuum tube) is little, is difficult to be fixed in protect in the container in the reality.

Summary of the invention

The objective of the invention is to, a kind of X-ray generator of protecting in the container that X-ray tube is fixed in reliably is provided.

X-ray generator of the present invention, the voltage generating unit that the output window maintaining part that has conductivity and heat conductivity concurrently is fixed on the X-ray tube of vacuum tube front end and drives this X-ray tube is contained in the protection container, it is characterized in that having: the flange part that is formed at the output window maintaining part; Be arranged at the front panel of protecting container and having the peristome that inserts for the output window maintaining part; The jut of the flange part of, butt output window maintaining part outstanding from the wall of the peristome that forms front panel; And the flange part of butt jut pushed and have and be formed at hold-doun nut external thread part, that heat conductivity is arranged that the negative thread portion of the wall of peristome screws togather to jut.

In this X-ray generator, under the state in the peristome that the output window maintaining part of X-ray tube is inserted front panel, the external thread part of hold-doun nut and the negative thread portion that is formed at the wall of peristome are screwed togather, tighten hold-doun nut.And, by fully tightening hold-doun nut, flange part that is arranged at X-ray tube output window maintaining part and the jut butt that is arranged on the front panel, its result is at fixing spiral shell

With following, flange part is pushed to jut, and X-ray tube is fixed on the front panel.Therefore, utilize such hold-doun nut, then can make X-ray tube easy

Be fixed in the protection container by ground.And, utilizing hold-doun nut with heat conductivity, can improve from the output window maintaining part of X-ray tube conductibility to the heat of front panel, the thermal capacitance of X-ray tube is easily distributed, can keep the luminous efficiency of X ray, prevent the breakage of X-ray tube.

In addition, the internal face of hold-doun nut is contacted with the lateral surface of output window maintaining part.When adopting such formation, can utilize hold-doun nut to realize the location of X-ray tube easy and reliably, and can further improve from the output window maintaining part that is arranged at X-ray tube conductibility to the heat of front panel.Like this, can further improve the generation of keeping X rayPrevent the performance of X-ray tube breakage.

In addition, preferably also has rubber ring between the flange part that is clipped in hold-doun nut front end and output window maintaining part.Because the Zhong Jie effect of rubber ring, the flange part of X-ray tube can apply appropriate pressing force to jut, and is fixing reliably.

In addition, X-ray generator of the present invention, the irradiation accumulating time, the output that preferably also have X ray in the aforementioned X-ray tube of instrumentation are represented by the timer of the signal of the irradiation accumulating time of the X ray of instrumentation.Because X-ray tube is a limited dress of life-spanWith, can utilize aforementioned timer correctly to hold the irradiation accumulating time of the X ray of X-ray tube, carry out the artefact management of X-ray generator suitably.

Description of drawings

Fig. 1 shows X of the present invention

The exploded perspective view of generating means one embodiment.

Fig. 2 is Fig. 1

The profile of X-ray generator.

Fig. 3 is the profile along Fig. 2 III-III line.

Fig. 4 is the profile that shows X-ray tube.

Fig. 5 be X-ray generator shown in Figure 2 want portion's amplification profile.

Fig. 6 is the stereogram that shows the state on the front panel that X-ray tube is assemblied in.

Fig. 7 is the block diagram that the formation that relevant ID checks is shown.

Fig. 8 is the flow chart that the ID collation process is shown.

Embodiment

Below, elaborate with reference to the suitable example of accompanying drawing with regard to X-ray generator of the present invention.

As Fig. 1～shown in Figure 3, X-ray generator 1 has theprotection container 2 of box, and thisprotection container 2 is made of the good material of heat conductivity, is divided into 3 parts.That isprotection container 2 is by thecontainer body portion 4 of the quadrangular shape of stainless steel, the flat front panel of aluminum

Theflat backplate 6 that reaches aluminum is formed, and constitutes the casing of 3 Splittables.And this protectscontainer 2, sets its total length and is about 100mm, and the thickness offront panel 5 is about about 10mm.Therefore, the thickness offront panel 5 reaches the about 1/10 of total length, can seek high-cooling property by the thickness that increases front panel 5.Again, in theprotection container 2, the installation of aluminum is screwed withbase 7.

Insuch protection container 2, theX-ray tube 8 that static is removed etc. takes place, is used in the configurable grenz ray that makes.ThisX-ray tube 8 as shown in Figure 4, has thecylindric vacuum tube 9 of Kovar alloy glass, end at thisvacuum tube 9, form thestem 11 ofband blast pipe 10,, fuse and form the metal outputwindow maintaining part 12 of Kovar alloy cylindraceous in the open end of vacuum tube 9.In addition, in this outputwindow maintaining part 12, with the output window of Ag soldering fixed disc shape

Thecentral opening 12a of outputwindow maintaining part 12 is clogged, at output window

Inner face side, evaporation forms thetarget 14 that the impact utilize electron beam produces X ray.

Again, be fixed with 2stem bars 15,15 in thestem 11, invacuum tube 9, be provided with as the lamp that penetrates the negative electrode of electron beam with assigned voltage

Thisfilament 16 is fixed in the front end of stem bar 15.In addition, on a side thestem bar 15, fixing the focusingpole plate 17 of stainless steel cylindraceous.And, this outputwindow maintaining part 12, owing to is formed by the Kovar alloy metal, so heat conductivity and conductivity are good, simultaneously, owing to theprotection container 2 with ground connection is electrically connected, thereby are in earthing potential, its result,target 14 also is maintained at earthing potential.

On thestem bar 15 ofX-ray tube 8,, penetrate electron beam to thetarget 14 of earthing potential herein, fromfilament 16 from the high potential ofvoltage generating unit 21 supply-9.5kV described later.At this moment, by the impact of electron beam, penetrate grenz ray fromtarget 14, this X ray penetrates to the outside from output window 13.By suchformation X-ray tube 8,vacuum tube 9 can be made diameter 15mm, length is size about 30mm, and total length is that the small-sized X-ray tube 8 about 40mm becomes possibility.In addition, in use, thetarget 14 of small-sized X-ray tube 8 is in the condition of high temperature, therefore, for the luminous efficiency of keeping X ray and the breakage that preventstarget 14, needs suitably the heat oftarget 14 to be distributed to the outside.

Again, as shown in Figures 1 and 2, thevoltage generating unit 21 of carrying oncircuit substrate 20 is accommodated in the protection container 2.Thisvoltage generating unit 21 is used for to stemThe high potential of supply-9.5kV, driving X-ray tube 8.At first, the low-voltage happening part involtage generating unit 21 is brought up to current potential-1kV, current potential is brought up to-9.5kV at the high voltage happening part again.Thecircuit substrate 20 of suchvoltage generating unit 21 is screwed on thebedplate 22 of steel.Again, thedistribution 21a from the high voltage happening part of voltage generating unit extends withstem bar 15 tie lines ofX-ray tube 8, on thevacuum tube 9 ofX-ray tube 8, is fixing the cover cylindraceous 19 that covers stem bar 15.In addition,cover 19

Behinddistribution 21a andstem bar 15 tie lines, filling silicones P (with reference to Fig. 6).In addition, oncircuit substrate 20, be provided with thefront end circuit 40 of built-in CPU41 (with reference to Fig. 7), from preposition

Control signal

Line 42 (with reference to Fig. 2) outputs tovoltage generating unit 21.

At the front end of thisbedplate 22, be provided with setting integratedly and be the1st installation sheet 22a of L font, in the rear end ofbedplate 22, also be provided with setting integratedly and be the2nd installation sheet 22b of L font.Again, the1st installation sheet 22a is used tovoltage generating unit 21 is fixed on theprotection container 2, the2nd installation sheet 22b be used to install withcircuit substrate 20 on thesplicing ear 23 of low-voltage happening part tie lines.For example, the1st installation sheet 22a fixes by limit screw, makes it to compressfront panel 5, and splicingear 23 is fixed on the2nd installation sheet 22b by fasteningnut 24, andbackplate 6 is fixing byscrew 28, makes it to compress the 2nd installation sheet 22b.Like this, the goodflat front panel 5 of aluminum of heat conductivity is connected with thebedplate 22 ofbackplate 6 by steel, therefore, also can utilizebackplate 6 heat radiations, realizes the high-cooling property ofprotection container 2.

Again, whenaforementioned X-ray tube 8 was fixed inprotection container 2,X-ray tube 8 was fixed on thefront panel 5 of aluminum.As Fig. 1 and shown in Figure 5, form the columnedperistome 26 that inserts for the outputwindow maintaining part 12 ofX-ray tube 8 on thisfront panel 5, making on thewall 26a of thisperistome 26, form thejut 27 of ring-type towards the inboard.Be arranged at theflange part 18 and thesejut 27 butts of the ring-type of outputwindow maintaining part 12 front ends integratedly.

Again, formnegative thread portion 29 on thewall 26a ofperistome 26, the hold-doun nut 30 of bandexternal screw thread 30a screws togather with this negative thread portion 29.The good brass of these hold-doun nut 30 usefulness heat conductivities is made, and is made of the hexagon-head 32 that can insert the body roughlycylindraceous portion 31 in theperistome 26 and form hexagonal (hexagon)nut.

, under the state in theperistome 26 that the outputwindow maintaining part 12 ofX-ray tube 8 is insertedfront panel 5, theexternal thread part 30a of hold-doun nut 30 andnegative thread portion 29 are screwed togather herein, tighten hold-doun nut 30.And,, be arranged at thejut 27 offlange part 18 buttfront panels 5 of the ring-type ofX-ray tube 8 outputwindow maintaining parts 12 by fully being screwed into hold-doun nut 30.Consequently,flange part 18 utilizes fixedly spiralshell

Front end 30b pushes to jut 27, makesX-ray tube 8 be fixed in front panel 5 (with reference to Fig. 6).Therefore, utilize such hold-doun nut 30, can makeX-ray tube 8 easy, be fixed in theprotection container 2 reliably.And the good material of hold-doun nut 30 usefulness heat conductivities forms, so, can improve from the conductibility ofX-ray tube 8 outputwindow maintaining parts 12 to the heat offront panel 5, distribute the heat of temperature easily, can keep the luminous efficiency of X ray, preventtarget 14 breakages near outputwindow maintaining part 12 Celsius 100 ℃.

In addition, on the internal face of hold-doun nut 30, form outstanding to the inside locatingsurface 30c, this locatingsurface 30c contacts with the lateral surface of output window maintaining part 12.Like this, can utilizefixed screw cap 30 to realize the location ofX-ray tubes 8 easy and reliably, and can further improve from the outputwindow maintaining part 12 that is arranged atX-ray tube 8 conductibility to the heat of front panel 5.Therefore, can further improve the luminous efficiency of keeping X ray and prevent the hit performance of 14 breakages ofX-ray tube 8.

In addition, if between theflange part 18 of thefront end 30b of hold-doun nut 30 and outputwindow maintaining part 12,sandwich rubber ring 34,, 18 pairs of juts offlange part 27 are fixed reliably with appropriate pressing force then by being screwed into of hold-doun nut 30.In addition, when adopting aforesaid hold-doun nut 30, the thickness offront panel 5 must strengthen, and thereupon, can seek the high-cooling property of front panel 5.Again,, make thefront panel 5 of the good aluminum of heat conductivity carry out hot link,, realize the high-cooling property ofprotection container 2 so also can utilizebackplate 6 heat radiations withbackplate 6 owing to thebedplate 22 with steel is an intermediary.

Among Fig. 7, show the formation of X-ray generator 1 and peripheral device thereof.As shown in Figure 7, X-ray generator 1 is via splicing ear 23 (references

Fig. 2) be connected withcontrol part 50,control part 50 is connected with auxiliary equipment 60.Control part 50 is used for managing X-ray generator 1 by the user of X-ray generator 1.In addition,auxiliary equipment 60 is by X-ray generator 1 and control

Management company uses.

In the X-ray generator 1, be connected with the CPU41 offront end circuit 40 via voltage generating unit 21 (with reference to Fig. 2) andX-ray tube 8, this CPU41, by the conduction time of 21 pairs ofX-ray tubes 8 of monitor voltage generating unit, the irradiation time of the X ray of X-ray tube 8 (that is, the operating time of X-ray tube 8) is carried out instrumentation, accumulative total.The X-ray tube work cumulative time of accumulative total, together with the manufacturing sequence number of X-ray generator 1, make the intrinsic code of date, examiner's name, X-ray generator 1 etc., by the CPU41 memory at front end circuit

Among the not shown EEPROM (Electrically Erasableand Programmable ROM).

In thecontrol part 50, CPU51 is being set, reaching therepeater lamp 52 that showsX-ray tube 8 operating states.The operating time of CPU51 instrumentation, accumulative total control part 50.The control part work cumulative time of accumulative total, together with the manufacturing sequence number of X-ray generator 1, make date, examiner's name, and the intrinsic code of X-ray generator 1 etc., by the CPU51 memory at control part

Among the interior not shown EEPROM.

CPU41 and the control of managingfront end circuit 40 in the lump is set in theauxiliary equipment 60

Display part 62, and theinput part 63 that constitutes such as the keyboard used by input information of CPU61, display message of CPU51.As shown in Figure 7, by X-ray generator 1 is connected withcontrol part 50 andauxiliary equipment 60, the operator of management company can show ondisplay part 62 remembering in the information of the EEPROM of X-ray generator 1 and remembering in the information of the EEPROM ofcontrol part 50, and can be with these information of information rewriting ofinput part 63 inputs.

For example, when only exchanging X-ray generator 1, the operator of management company, can with remember the X-ray generator 1 before the exchange of the EEPROM ofcontrol part 50 the manufacturing sequence number, make date, examiner's name, and exchange before the information rewriting of intrinsic code of X-ray generator 1 be new X-ray generator 1 the manufacturing sequence number, make date, examiner's name, and the information of the intrinsic code of new X-ray generator 1.

In addition, the operator of management company, can with utilizefront end circuit 40 CPU41 accumulativetotal X-ray tube 8 the work cumulative time and utilize work cumulative time ofcontrol part 50 of the CPU51 accumulative total ofcontrol part 50 ondisplay part 62, to show, thereby the work cumulative time of correctly holdingX-ray tube 8 and control part 50.Particularly, becauseX-ray tube 8 is limited goods of life-span, thereby has by correctly holding the work cumulative time ofX-ray tube 8, can carry out X ray suitably and send out

The advantage of artefact management.

The CPU41 offront end circuit 40 is only receiving from control

During the x-ray bombardment signal of CPU51, just carry out the irradiation of the X ray that undertaken by X-ray tube 8.Like this, the irradiation of the X ray that is undertaken byX-ray tube 8 is subjected to the control from the x-ray bombardment signal of the CPU51 of control part 50.For this reason, when the CPU51 ofcontrol part 50 drops at the power supply of thiscontrol part 50, only once, the ID collation process ofexecution graph 8, with the irradiation of the X ray that prevents to produce without X-ray generator 1 permission, unsuitable in possible trouble.Below, the ID collation process of Fig. 8 is described.

When the power supply ofcontrol part 50 drops into, begin the ID collation process ofexecution graph 8 by CPU51.At first, read the manufacturing sequence number and the intrinsic code (S1 of Fig. 8) of the X-ray generator 1 of remembering the EEPROM in front end circuit 40.Then, the manufacturing sequence number of the X-ray generator 1 read is checked with the manufacturing sequence number of remembering the X-ray generator 1 of the EEPROM incontrol part 50, simultaneously, the intrinsic code of the X-ray generator 1 read is checked (S2) with the intrinsic code of remembering the X-ray generator 1 of the EEPROM in control part 50.In addition, why, check making sequence number and intrinsic code respectively, change because make the identical and intrinsic code of sequence number sometimes even be as the ID (identifying information) of X-ray generator 1.

The result who checks, judge to make sequence number and intrinsic code whether all consistent (checking establishments) (S3), allow to export x-ray bombardment signal (S4) from the CPU51 ofcontrol part 50 when making sequence number and intrinsic code when all consistent.

Otherwise, when a certain item in manufacturing sequence number and the intrinsic code in the S3 step is inconsistent, forbid exporting x-ray bombardment signal (S5), shine (S6) by makingrepeater lamp 52 from the CPU51 ofcontrol part 50, notify the user without permission, unsuitable X-ray generator 1 just is being used.

By carrying out the processing of above such Fig. 8, the x-ray bombardment signal of the CPU51 ofcontrol part 50 is only to through 1 output of permission, suitable X-ray generator, and the irradiation that can prevent the X ray that takes place without X-ray generator 1 permission, unsuitable is in possible trouble.

Utilizability on the industry

X-ray generator of the present invention owing to adopt above such formation, can obtain following effect. That is, in the X-ray generator in the voltage generating unit that the output window maintaining part with electric conductivity and heat conductivity is fixed in the X-ray tube of vacuum tube front end and this X-ray tube is driven is contained in the protection container, have: the flange part that is formed at the output window maintaining part; Be arranged at the front panel of protecting container and having the peristome that inserts for the output window maintaining part; The jut of the flange part of, butt output window maintaining part outstanding from the wall of the peristome that forms front panel; And the flange part of butt jut pressed and have hold-doun nut external thread part, that heat conductivity is arranged that the negative thread section with the wall that is formed at peristome screws togather to jut, like this, X-ray tube is fixed in the protection container reliably.

Claims (2)

1. X-ray generator, the voltage generating unit that the output window maintaining part that has conductivity and heat conductivity concurrently is fixed on the X-ray tube of vacuum tube front end and drives this X-ray tube is contained in the protection container, it is characterized in that having:

Be formed at the flange part of aforementioned output window maintaining part;

The front panel that is arranged at aforementioned protection container and has the heat conductivity of the peristome that inserts for aforementioned output window maintaining part;

Outstanding from the wall of the aforementioned peristome that forms aforementioned front panel, with the jut of the aforementioned flange part butt of aforementioned output window maintaining part; And

The aforementioned flange part of the aforementioned jut of butt is pushed and had and be formed at hold-doun nut external thread part, that heat conductivity is arranged that the negative thread portion of the aforementioned wall of aforementioned peristome screws togather to aforementioned jut, front end at the internal face of this hold-doun nut, form outstanding to the inside locating surface, this locating surface contacts to realize the location of aforementioned X-ray tube with the lateral surface of aforementioned output window maintaining part, and be used to carry out from of the heat conduction of aforementioned output window maintaining part to front panel

Also possesses the rubber ring between the aforementioned flange part of the front end that is clipped in the aforementioned fixation nut and aforementioned output window maintaining part.

2. X-ray generator as claimed in claim 1 is characterized in that,

The backplate of aforementioned front panel and the heat conductivity that is arranged at aforementioned protection container is connected by the bedplate of steel.

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