CN109216138A - X-ray tube - Google Patents
X-ray tube Download PDFInfo
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- CN109216138A CN109216138A CN201710524615.8A CN201710524615A CN109216138A CN 109216138 A CN109216138 A CN 109216138A CN 201710524615 A CN201710524615 A CN 201710524615A CN 109216138 A CN109216138 A CN 109216138A
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- anode
- shell
- ray tube
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- engaging portion
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- 238000000429 assembly Methods 0.000 claims description 27
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- 238000009434 installation Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
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Abstract
The invention discloses a kind of X-ray tubes, including the fixed device of shell, cathode, anode and at least two.Cathode is located in shell and draws electronic beam current from multiple positions.Anode has strip, is located in shell and is aligned with cathode to generate Multi-Beam X-Ray from multiple target spots.Fixed device is mounted on shell, and is connect at least two different positions of the length direction of the anode with anode, so that the distance between multiple positions of the generation electronic beam current of cathode and multiple target spots of anode keep uniform.When X-ray tube generates biggish linear expansion since temperature raises during the anode working of strip, stress can be discharged, maintains the spacing between cathode and anode uniform.
Description
Technical field
The embodiment of the present invention is related to a kind of X-ray tube, more particularly, it relates to which one kind can generate X-ray from multiple target spots
X-ray tube.
Background technique
Ray has a wide range of applications in fields such as industrial nondestructive testing, safety inspection, medical diagnosis and treatments.Generate X
The device of ray is known as x-ray source, generally includes the auxiliary devices such as X-ray tube, power supply and control system, cooling and shielding.X is penetrated
Spool mainly includes shell and is mounted on shell inner cathode and anode.Cathode generate electronic beam current, electronic beam current by cathode with
High voltage electric field between anode accelerates, and hits anode target surface, generates X-ray.Anode needs to load tens kilovolts to several hundred thousand
The high voltage of volt, and need to keep extraordinary with the shell (usually ground potential) of ray tube to be electrically insulated, due to anode lengths
With quality very little, therefore it is supported usually using single insulating fixing structure (such as glass column) opposing rays tube shell.
In the course of work, anode receives beam bombardment, can generate a large amount of heat, the temperature meeting acute variation of anode, usual temperature rise
It is several hundred degrees Celsius, the thermal expansion effects of anode can make its size change.Due to traditional anode dimension very little, usually
Grade, therefore influence of the change in size thermally expanded to structure can generally also be ignored.Powerful X-ray tube is using rotation
The structure of anode, i.e. anode are disc, can be banged along the fixing axle high speed rotation at center, electronic beam current from a fixed position
The edge of anode disc is hit, anode disc is by rotation so that the different zones of disk receive the bombardment of electron amount in turn, in fact
The dispersion of existing thermal power.This anode is fixed again by the single fixed position of axis.
A kind of multiple target point (focus) X-ray tube (or distributed X-ray source), including shell, setting have been had developed in shell
Multiple cathodes and anode in body, anode are equipped with multiple target spots, to generate X-ray from multiple and different positions.This distribution X-ray
Source is due to that can generate X-ray from multiple and different positions under slave mode with multiple cathodes and multiple target spots.
Summary of the invention
The embodiment of the present invention technical problem to be solved is, provides a kind of X-ray tube, in strip anode working
When generating biggish linear expansion since temperature raises in the process, stress can be discharged, maintains the spacing between cathode and anode
Uniformly.
Embodiment according to an aspect of the present invention, provides a kind of X-ray tube, including shell, cathode, anode and at least
Two fixed devices.Cathode is located in shell and is configured to draw electronic beam current from multiple positions.Anode have strip,
In shell and it is configured to be aligned with cathode to generate Multi-Beam X-Ray from multiple target spots.Fixed device is mounted on described
On shell, and it is configured to connect at least two different positions of the length direction of the anode with the anode, so that
The distance between multiple positions of the generation electronic beam current of the cathode and multiple target spots of the anode keep uniform.
X-ray tube according to an embodiment of the present, at least one of fixed device are configured to allow for described
Anode is mobile relative to the shell at least one link position that at least one fixes device and shell.
X-ray tube according to an embodiment of the present, at least one is fixed device and is configured to allow for the anode
It is only mobile relative to the shell in the length direction.
X-ray tube according to an embodiment of the present, each fixed device includes: main part, is mounted on institute
It states on shell；And first engaging portion, it is arranged on the main part.It is equipped with the second engaging portion on the anode, described the
One engaging portion is movably coupled together with the second engaging portion, with allow the anode only in the length direction relative to
The shell is mobile.
X-ray tube according to an embodiment of the present, a packet in first engaging portion and the second engaging portion
The sliding groove extended in the length direction is included, another in first engaging portion and the second engaging portion includes being kept
In the sliding groove and along the slide assemblies of length direction sliding.
X-ray tube according to an embodiment of the present, the sliding groove include: from first engaging portion and second
Opening portion that one surface in engaging portion is recessed inwardly and from the side wall side of the opening portion to concave shape at constraint
Portion.The slide assemblies include: the linking arm being inserted into the opening portion；And it vertical with the linking arm connect and installs
Restrained portion in the constriction, enable the slide assemblies in the sliding groove only in the length direction
It slides and the slide assemblies is prevented to be detached from the sliding groove.
X-ray tube according to an embodiment of the present, the sliding groove are formed on the anode, the Slide Group
Part is fixed on the main part.
X-ray tube according to an embodiment of the present, the main part are equipped with through hole, peace in the through hole
Fill anode connector or for making the protection pipe of cable or cooling medium pass through the through hole.
X-ray tube according to an embodiment of the present, the shell have rough elongated hexahedral shape, and
And the hexahedron includes: to extend in the longitudinal direction and be equipped with the first side table for drawing the Windows of the X-ray
Face, second side surface opposite with first side surface, upper surface, lower surface and two end surfaces.The fixed device
Two device for fixing end part including being connected to the anode both ends, one in two device for fixing end part is configured to allow for
The anode is mobile relative to the shell in the link position of one fixed device and shell.
X-ray tube according to an embodiment of the present, the fixed device further include being arranged two ends
It fixes between device and at least one intermediate retainer on an upper is set.
X-ray tube according to an embodiment of the present, two device for fixing end part are separately mounted on described
On surface and it is located near two ends of the shell.
X-ray tube according to an embodiment of the present, the shell have rough elongated hexahedral shape, and
And the hexahedron includes extending in the longitudinal direction and being equipped with the first side table for drawing the Windows of the X-ray
Face and upper surface.The cathode includes multiple sub- cathodes being sequentially arranged, and the anode includes multiple strips being sequentially arranged
Sub- anode, every sub- anode is configured to be aligned with respective sub- cathode.The fixed device is arranged on the upper surface,
And a fixed device is equipped on each sub- anode, so that the generation electronic beam current of the sub- cathode is multiple
The distance between multiple target spots of position and the sub- anode keep uniform.
The whole length-width ratio of X-ray tube according to an embodiment of the present, the anode of the strip is greater than 10, respectively
For the length-width ratio of a sub- anode less than 10, preferential is no more than 5.
The X-ray tube of above-mentioned working Examples according to the present invention, by the way that fixed device is arranged, in the anode work of strip
When generating biggish linear expansion since temperature raises during making, stress can be discharged, between maintaining between cathode and anode
Away from uniform, to realize that anode accurately reliably positions.
Detailed description of the invention
These and or other aspects and advantage of the invention will become from description of preferred embodiments with reference to the accompanying drawing
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is a kind of stereoscopic schematic diagram of the X-ray tube of exemplary embodiment according to the present invention；
Fig. 2 is a kind of the first engaging portion of exemplary embodiment according to the present invention and the combination of the second engaging portion
Stereoscopic schematic diagram；
Fig. 3 A-3E is the first engaging portion of further exemplary embodiment according to the present invention and the knot of the second engaging portion
The schematic cross-section of conjunction mode；
Fig. 4 A-4C is the stereoscopic schematic diagram of the fixed device of different shapes of an exemplary embodiment of the present invention；
Fig. 5 A-5G is to show the fixation device of an exemplary embodiment of the present invention to be mounted on the different location of shell
Schematic diagram；And
Fig. 6 is that the section of the anode and the mounting means of fixed device of another exemplary embodiment in accordance with the present invention shows
It is intended to.
Description of symbols
1: shell；
11: the first side surfaces；
12: the second side surfaces；
13: upper surface；
14: lower surface；
15,16: end surfaces；
2: cathode；
2 ': sub- cathode；
3: anode；
3 ': sub- anode；
31: the second engaging portions；
32: sliding groove；
321,323: opening portion；
322,324: constriction；
4: Windows；
5: cathode connector；
6: anode connector；
7,76: fixed device；
71: main part；
72: the first engaging portions；
73,74；Device for fixing end part；
75: intermediate retainer；
711: through hole；
721: linking arm；
723: the first arms；
724: the second arms；
722,725,726: restrained portion；
E: electronic beam current；
H1, h2, h3: the distance between anode and cathode.
Specific embodiment
Throughout the specification, similar appended drawing reference indicates similar part.
Below will be by embodiment, and in conjunction with attached drawing, the technical solutions of the present invention will be further described.It is saying
In bright book, the same or similar drawing reference numeral indicates the same or similar component.Following reference attached drawings are to embodiment of the present invention
Explanation be intended to explain present general inventive concept of the invention, and be not construed as to a kind of limitation of the invention.
In addition, in the following detailed description, to elaborate many concrete details to provide to present disclosure convenient for explaining
The comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments without these specific details can also be with
It is carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
Inventive concept generally according to the present invention, a kind of X-ray tube include: shell；Cathode, the cathode are located at shell
It is interior and be configured to from multiple positions draw electronic beam current；Anode, the anode are located in shell, have strip, and
It is configured to be aligned with cathode to generate Multi-Beam X-Ray from multiple target spots；And at least two fixed devices, it is mounted on the shell
It on body, and is configured to connect at least two different positions of the length direction of the anode with the anode, so that institute
The distance between multiple positions and the multiple target spots of the anode for stating the generation electronic beam current of cathode keep uniform.
Fig. 1 is a kind of stereoscopic schematic diagram of the X-ray tube of exemplary embodiment according to the present invention.
As shown in Figure 1, a kind of X-ray tube of exemplary embodiment according to the present invention includes shell 1, multiple cathodes 2, sun
Pole 3 and multiple fixed devices 7.High vacuum is formed in shell 1, provides high vacuum seal environment for cathode and anode.Cathode 2 is located at
In shell 1 and it is configured to draw electronic beam current E from multiple positions.Anode 3 have strip, be located at shell 1 in and by
It is configured to be aligned with cathode 2 to generate Multi-Beam X-Ray from multiple target spots.Specifically, the electronic beam current E quilt drawn by cathode 2
High voltage electric field between cathode and anode accelerates and obtains energy, hits multiple target spots (or focus) on anode, from
And generate Multi-Beam X-Ray X.X-ray is drawn out to outside ray tube by the Windows 4 being arranged on shell 1 and is applied.At least
Two fixed devices 7 are mounted on shell 1, and be configured at least two different positions in the length direction of anode 3 with
The anode 3 connects, so that the distance between multiple positions of the generation electronic beam current of cathode 2 and multiple target spots of anode are kept
Uniformly.
X-ray tube according to an embodiment of the present invention, cathode 2 include multiple cathode electrode units, can be from each cathode electrode unit point
It Chan Sheng not electronic beam current E.Anode has string configuration, generates X-ray, multiple target spots from multiple target spots (focus) of anode 3
It is arranged as straight line.The lineal measure or length-width ratio of entire anode 3 depend on the target spot for generating X-ray quantity and
The density degree of target spot arrangement.For example, the target spot quantity of X-ray tube according to an embodiment of the present invention can reach hundreds of, anode
Length can achieve several centimetres even up to a hundred centimetres.Anode 3 is applied the high voltage that opposing cathode 2 is positive potential, usually
Tens kilovolts are arrived several hundred kilovolts, thus anode 3 can establish high voltage electric field between cathode 2 and anode 3.It is produced from cathode electrode unit
Effect of the raw electronic beam current by high voltage electric field obtains high-energy and finally hits anode, produce to anode movement after being accelerated
Raw X-ray is simultaneously launched, and impingement position is referred to as anode focus or target spot.Anode is after receiving beam bombardment, temperature
Degree, which increases will lead to, generates thermal expansion in length direction.By the way that fixed device is arranged, make it in strip anode working process
In when generating biggish linear expansion since temperature raises, stress can be discharged, maintain the spacing between cathode and anode uniform,
To realize that anode accurately reliably positions.
The electronic beam current that cathode generates only will not just lose because of colliding with air molecule under vacuum conditions, yin
High voltage electric field between pole and anode also only will not just puncture sparking under high vacuum environment.Cathode connector 5 and anode connect
It connects device 6 to be arranged on X-ray tube shell, on the one hand guides to the electric connecting point of cathode and anode outside X-ray tube shell；Separately
On the one hand the high vacuum seal characteristic that also keep shell, i.e., cannot destroy the high vacuum seal requirement of shell script.
In one embodiment, at least one of fixed device 7 is configured to allow for anode 3 to fix dress at least one
It sets mobile relative to shell 1 at least one link position of shell 1.Further, at least one is fixed device 7 and is configured to
Allow anode 3 only mobile relative to shell 1 on the length direction of anode 3.
The anode of the embodiment of the present invention is strip, for example, the length-width ratio of anode is typically larger than 10, even up to length-width ratio
It is tens.It is apart from each other with the fixed point if also anode is fixed on shell 1 in a point using a fixed device
Position, can generate position error enlarge-effect, realize that precise positioning has very big difficulty, or even if first installation positioning is quasi-
Really, it is still difficult to ensure the long-time accurate positioning compared with distant positions.For example, transport and use process in anchor point it is a small amount of
Deformation also can be because of error enlarge-effect, so that anode position variation or position inaccurate.The variation or positioning of anode position are not
Accurately, it can be brought a negative impact to the field distribution between cathode, anode, so that the mass property (packet of the X-ray of final products
Include focus size, shape, position and the X-ray intensity etc. of X-ray) do not meet initial design objective.
X-ray tube according to an embodiment of the present invention, during the anode working of strip, the electronic beam current of cathode generation
After being accelerated by high voltage electric field and obtain energy and bombard anode, the kinetic energy of 99% or more electronic beam current is converted into thermal energy, therefore
Temperature meeting acute variation, typical temperature variation are several hundred degrees Celsius to anode at work.Such as the tungsten material for being 1m for length
For manufactured anode, even if only 200 degree of temperature change, thermal expansion can also reach about 0.9 millimeter.If anode and fixation
Two fixing points between device all using the connection being completely fixed, then can generate great thermal expansion stress, damage anode or
The fixation device of person's anode.Therefore, in an embodiment of the present invention, for connecting the fixation device of strip anode, in length
Only one point is connected using fixed form on direction, another point is connected using manner.In this way, being generated when temperature increases
When biggish linear expansion, since fixed device 7 is configured to allow for anode 3 only mobile in the longitudinal direction relative to shell 1,
Thermal expansion stress can be discharged in this way, maintain the spacing between cathode and anode uniform, so that the quality of the X-ray of final products
Characteristic (focus size, shape, position and X-ray intensity including X-ray etc.) has stability.
Fig. 2 is a kind of the first engaging portion of exemplary embodiment according to the present invention and the combination of the second engaging portion
Stereoscopic schematic diagram.As illustrated in fig. 1 and 2, each fixed device includes the main part 71 being mounted on shell 1 and is arranged in master
The first engaging portion 72 in body portion 71.The second engaging portion 31 is equipped on anode 3, the first engaging portion 72 and the second engaging portion 31 can
It is movably combined together, to allow anode 3 only mobile in the longitudinal direction relative to shell 1.
More specifically, referring to Fig. 1 and 2, can the anode 3 to strip carry out three-dimensional coordinate orientation, the length side of anode 3
To for X-axis, width direction is Y-axis, and short transverse is Z axis.Being flexibly connected by by being arranged between fixed device 7 and anode 3
The moving connecting mechanism of the first engaging portion 72 and the second engaging portion 31 composition being arranged on anode 3 on the securing means is real
Existing, this moving connecting mechanism allows anode 3 only to move in the X-axis direction relative to shell 1.One-way movable bindiny mechanism includes
Matrix fixed structure (sliding groove) and formula bascule (slide assemblies).
In one embodiment, the second engaging portion 31 includes the sliding extended on the length direction (X-direction) of anode 3
The slide assemblies of slot 32, the first engaging portion 72 are maintained at the slide assemblies slided in sliding groove 32 and along its length.More
Body, sliding groove 32 include opening portion 321 and constriction 322, opening portion 321 from one surface in the second engaging portion 31 to
Sunken inside, constriction 322 from the side wall side of opening portion 321 to concave shape at.Slide assemblies include linking arm 721 and restrained portion
722, linking arm 721 is inserted into opening portion 321；Restrained portion 722 is vertical with linking arm 721 to be connect and is mounted on constriction
In 322, slide assemblies are only slided in the longitudinal direction in sliding groove 32 and slide assemblies is prevented to be detached from sliding groove
32.That is, the restrained portion 722 in slide assemblies is disposed substantially perpendicularly to linking arm protrusion, can permit in this way
Slide assemblies can only move on the length direction (X-direction) of anode 3, and limit slippage component is moved in Y-axis and Z-direction
It is dynamic.It is appreciated that sliding groove 32 and slide assemblies have shape complimentary to one another, slide assemblies are mounted in sliding groove.
In one embodiment, the sliding groove 32 of the second engaging portion 31 is formed on anode, and the slide assemblies are fixed on
On the main part 71 of fixed device 7.In a kind of alternate embodiment, slide assemblies are arranged on anode 3,32 shape of sliding groove
At on the main part 71 of fixed device 7.
In the embodiment shown in Figure 2, the cross section of sliding groove 32 and the slide assemblies of the first engaging portion 72 all has greatly
" ┴ " shape caused.
Fig. 3 A-3E is the first engaging portion of further exemplary embodiment according to the present invention and the knot of the second engaging portion
The schematic cross-section of conjunction mode.
In the embodiment as shown in fig. 3 a, in section view, the sliding groove of the second engaging portion 31 has rough L shape
And the opening portion 323 including the side walls collapse from the second engaging portion 31 and the ending vertical from the opening portion are in opening portion 323
The constriction 324 of extension, the slide assemblies of the first engaging portion 72 include the first arm being resisted against on the side wall of the second engaging portion 31
723, the second arm 724 in the opening portion 323 is inserted into perpendicular to first arm and hang down from the end of the second arm 724
The restrained portion 725 directly extended in opening portion 323.
In the embodiment shown in figure 3b, in section view, the sliding groove of the second engaging portion 31 and the first engaging portion 72
Slide assemblies all there is rough " mountain " shape.
In the embodiment shown in Fig. 3 C, in section view, the sliding groove of the second engaging portion 31 and the first engaging portion 72
Slide assemblies all there is rough L shape.
In the embodiment shown in Fig. 3 D, in section view, the constriction and first of the sliding groove of the second engaging portion 31
The restrained portion 726 of the slide assemblies of engaging portion 72 all has rough semicircle.
In the embodiment shown in Fig. 3 E, in section view, the sliding groove of the second engaging portion 31 and the first engaging portion 72
Slide assemblies all there is rough " ├ " shape.
Fig. 4 A-4C is the stereoscopic schematic diagram of the fixed device of different shapes of an exemplary embodiment of the present invention.
As shown in figs. 4 a-4 c, in one embodiment, the main part 71 is equipped with through hole, in the through hole 711
Anode connector 6 is installed or for making the protection pipe of cable or cooling medium pass through the through hole 711.For example,
In a kind of embodiment, the protection of cable or cable for being electrically connected the intracorporal electronic device of shell (including cathode and anode etc.)
Pipe or arrangements of electric connection may be mounted in through hole 711；In another embodiment, for conveying the protection of cooling medium
Pipe is connected to across through hole 711, and with the through-hole formed in Anodic, to cool down to anode.
In the embodiment shown in Fig. 4 A, fixed device 7 mainly by being suitble to the electrically insulating material of vacuum environment to constitute, such as by
The insulating materials such as ceramics, glass, quartz are made.The exterior contour of main part 71 has rough cuboid；Shown in Fig. 4 B
Embodiment in, the exterior contour of main part 71 has substantial cylindrical；In the embodiment shown in Fig. 4 C, outside main part 71
Contouring has rough ripple tubular.Protection pipe or anode for conveying cooling medium are installed to connect in through hole 711
In the case where connecing device 6, outer surface length can be increased with the main part 71 of bellows form, not only expanded and external environment
Contact area, and improve the electric insulating effect of fixed device.Since anode 3 is typically applied to opposing cathode 2 tens thousand
Several hundred kilovolts of high pressure is lied prostrate, anode 3 is also similar high voltage with respect to X-ray tube shell 1, therefore fixed device 7 needs
Extraordinary electrical insulation characteristics.In general, on the one hand electric insulating effect depends on the dielectric parameter of material itself, i.e., in material
The resistance characteristic (i.e. bulk resistor) in portion；On the other hand the material surface between two different voltages sites is additionally depended on apart from (i.e.
Surface resistance), if anode is along the influence of the distance of the surface arrival shell of fixed device.The fixation device of the embodiment of the present invention removes
Specific material selection is outer, and there are also the length requirements of surface distance, such as the length of fixed device is usually tens mm to ten
More cm.
Fig. 5 A-5G is to show the fixation device of an exemplary embodiment of the present invention to be mounted on the different location of shell
Schematic diagram.
In one embodiment, as shown in Fig. 5 A-5G, shell 1 has rough elongated hexahedral shape, and six faces
Body includes: to extend and be equipped with the first side surface 11 for drawing the Windows 4 of X-ray in the longitudinal direction, with described the
The second opposite side surface 12 of one side surface 11, upper surface 13, lower surface 14 and two end surfaces 15 and 16.Fixed device 7
It is mounted on shell 1, fixed device 7 includes two device for fixing end part 73 and 74 for being mounted on anode both ends, and two ends are solid
Determining one in device 73 and 74 is configured to allow for the anode 3 in one device for fixing end part 73 or 74 and shell 1
Link position it is mobile relative to shell 1.In further carrying out example, fixed device further includes that setting is fixed two ends
Between device 73 and 74 and at least one intermediate retainer 75 for being arranged on upper surface 13.Generally, fixed device is in sun
The middle position of pole is attached using fixed form, solid and reliable to realize registration.Anode both ends articulating device
Keep the spacing between cathode and anode uniform, but anode can carry out suitable stretch along its length.
In the embodiment shown in Fig. 5 A, device for fixing end part 73 and 74 is all mounted on the upper surface 13 of shell 1 and position
Near two ends of shell, and device for fixing end part 73 and 74 is connected to the both ends of anode 3.The fixed dress in two ends
Setting one in 73 and 74 is configured to allow for the anode 3 in the company of one device for fixing end part 73 or 74 and shell 1
It is mobile relative to shell 1 to connect position.For example, the device for fixing end part 73 for being located at left side is connected using fixed form with anode 3
It connects, the fixation device 74 positioned at right side is attached using manner with anode 3, is had inside device for fixing end part 74 and is realized
The protection of anode connector 6, cable or cable that peripheral control unit is electrically connected with the intracorporal electronic device of shell (including anode)
Pipe.The protection pipe for cooling medium is equipped in a kind of alternate embodiment, inside device for fixing end part 73 and 74.Herein
In embodiment, the device for fixing end part 73 and 74 for being connected to the both ends of anode can make the spacing between cathode 2 and anode 3 equal
Even, line expansion is not generated because heated by anode 3 is influenced, and maintains anode and cathode consistent in the distance at both ends, i.e. h1=
h2。
In a kind of alternate embodiment, the connection type of two device for fixing end part 73 and 74 and anode 3 is work
Dynamic connection.The both ends of anode 3 are connect using manner, it can be achieved that anode is during the work time in temperature with fixed device 73 and 74
When degree increases centered on intermediate fixed point, to the linear expansion of both ends generation.Active connection place is used at the both ends of anode
Stress can be discharged by manner, maintain the stabilization of structure, guarantee the relative distance of anode both ends and cathode not by anode
The influence of length linear expansion, so that the distance between anode and cathode apparent surface are uniform.
In the embodiment shown in Fig. 5 B, intermediate retainer 75 is mounted on the upper surface 13 of shell 1；Two ends are solid
Determine the both ends that device 73 and 74 is separately mounted on two end surfaces 15 and 16 of shell 1 and is connected to anode 3.Two ends
One in fixed device 73 and 74 is configured to allow for the anode 3 in one device for fixing end part 73 or 74 and shell
1 link position is mobile relative to shell 1.For example, be located at the device for fixing end part 73 in left side using fixed form and anode 3 into
Row connection, the fixation device 74 positioned at right side are attached with anode 3 using manner, are had inside intermediate retainer 75
Realize peripheral control unit be electrically connected with the intracorporal electronic device of shell (including anode) anode connector 6, cable or cable
Protection pipe.In a kind of alternate embodiment, it is equipped with inside device for fixing end part 73 and 74 for conveying cooling medium
Protection pipe.In this embodiment, the device for fixing end part 73 and 74 for being connected to anode both ends can make between cathode 2 and anode 3
Spacing it is uniform, not generated line expansion due to heated by anode 3 is influenced, and maintains anode and cathode in the distance one at both ends
It causes, i.e. h1=h2.In a kind of alternate embodiment, the connection type of two device for fixing end part 73 and 74 and anode 3 is equal
To be flexibly connected.
In the embodiment shown in Fig. 5 C, intermediate retainer 75 is mounted on the upper surface 13 of shell 1；Two ends are solid
Determine device to be separately mounted on upper surface and be located near an end of shell 1 and another end of the shell
On end surfaces.For example, a device for fixing end part 73 is mounted on upper surface 13 and is located near an end of shell 1, separately
One device for fixing end part 74 is mounted on the end surfaces 15 of another end of shell 1.
In the embodiment shown in Fig. 5 D, a device for fixing end part 73 in two device for fixing end part is mounted on table
On face 13 and it is located near an end of shell, another is mounted on the end surfaces 16 of another end of shell 1.Two
One in device for fixing end part 73 and 74 be configured to allow for the anode 3 one device for fixing end part 73 or 74 with
The link position of shell 1 is mobile relative to shell 1.Have inside the device for fixing end part 73 in left side and realizes peripheral control unit
The protection pipe of the anode connector 6, cable or the cable that are electrically connected with the intracorporal electronic device of shell (including anode).
In the embodiment shown in Fig. 5 E, intermediate retainer 75 is mounted on the upper surface 13 of shell 1；Two ends are solid
Determine device 73 and 74 to be separately mounted on the second side surface 12.Have inside intermediate retainer 75 and realizes peripheral control unit and shell
Anode connector 6, the protection pipe of cable or cable of intracorporal electronic device (including anode) electrical connection.
In the embodiment shown in Fig. 5 F, intermediate retainer 75 is mounted on the upper surface 13 of shell 1, the fixed dress in end
It sets 73 to be mounted on second side surface 12 and be located near an end of shell 1, device for fixing end part 74 is mounted on shell
On the end surfaces 16 of another end of body 1.
In the embodiment shown in Fig. 5 G, intermediate retainer 75 is mounted on the upper surface 13 of shell 1, the fixed dress in end
It sets 73 to be mounted on upper surface 13 and be located near an end of shell 1, device for fixing end part 74 is mounted on second surface 12
It goes up and is located near the other end of shell 1.
Fig. 6 is that the section of the anode and the mounting means of fixed device of another exemplary embodiment in accordance with the present invention shows
It is intended to.
As shown in fig. 6, in one embodiment, shell 1 has rough elongated hexahedral shape, and six face
Body includes extending in the longitudinal direction and being equipped with the first side surface and upper surface for drawing the Windows of the X-ray
13；Cathode includes multiple sub- cathodes 2 ' being sequentially arranged；Anode includes the sub- anode 3 ' of multiple strips being sequentially arranged, each
Sub- anode 3 ' is configured to be aligned with respective sub- cathode 2 '；Fixed device 76 is arranged on the upper surface 13 of shell 1, Mei Gegu
Determine the shell 1 of one end connection X-ray tube of device 76, other end connexon anode 3 '.Also, it is equipped on every sub- anode 3 '
One fixed device 76, each fixed device 76 is to be fixedly connected with the connection type of respective sub- anode 3 ', so that sub- cathode 2 '
Multiple positions of generation electronic beam current and the distance between multiple target spots h1, h2, h3 ... hn of sub- anode 3 ' keep uniform.
In this way it can be ensured that every sub- 3 ' registration of anode, solid and reliable.Positioned at the fixation device of the approximately mid way between of shell 1
76 inside have the anode connector 6 realizing peripheral control unit and being electrically connected with the intracorporal electronic device of shell (including anode), cable
Or the protection pipe of cable.
According to the X-ray tube of above-described embodiment, strip anode is joined end to end arrangement by two or more sub- anodes 3 '
It forms, each sub- anode 3 ' is fixed by a fixed device 76.Pass through electric connection line (such as metal between each sub- anode
Conducting wire) realize electrical connection.The whole length-width ratio of the anode 3 of strip is greater than 10；The length-width ratio of each sub- anode 3 ' is excellent less than 10
First is no more than 5；Each sub- anode 3 ' is arranged as the straight line of one with strip cathode parallel.
The X-ray tube of above-mentioned working Examples according to the present invention, by the way that fixed device is arranged, in the anode work of strip
When generating biggish linear expansion since temperature raises during making, stress can be discharged, between maintaining between cathode and anode
Away from uniform, to realize that anode accurately reliably positions.
Although for the purpose illustrated according to being presently considered to be most realistic and preferred embodiment to this hair
It is bright to be described in detail.It will be understood to those skilled in the art that embodiment described above is all exemplary, and
Those skilled in the art can make improvements, and structure described in various embodiments is in not recurring structure or principle
It can be freely combined in the case where the conflict of aspect, to be realized more on the basis of solving technical problem of the invention
A variety of X-ray tubes.
After the preferred embodiment that the present invention will be described in detail, those skilled in the art can be apparent from,
It does not depart from the protection scope of appended claims and spirit is lower can carry out various change and change, and the present invention is also not only restricted to
The embodiment of examples cited embodiment in bright book.
Claims (13)
1. a kind of X-ray tube, comprising:
Shell；
Cathode, the cathode are located in shell and are configured to draw electronic beam current from multiple positions；
Anode, the anode has strip, in shell and is configured to be directed at cathode with from the generation of multiple target spots
Multi-Beam X-Ray；And
At least two fixed devices, installation on the housing, and be configured to the anode length direction at least two
A different position is connect with the anode so that the cathode generation electronic beam current multiple positions and the anode it is more
The distance between a target spot keeps uniform.
2. X-ray tube according to claim 1, wherein
At least one of described fixed device is configured to allow for the anode to fix device and shell extremely at least one
A few link position is mobile relative to the shell.
3. X-ray tube according to claim 2, wherein
At least one described fixation device is configured to allow for the anode only in the length direction relative to the shell
It is mobile.
4. X-ray tube described in any one of -3 according to claim 1, wherein
Each fixed device includes:
Main part, installation is on the housing；And
First engaging portion is arranged on the main part；
It is equipped with the second engaging portion on the anode, first engaging portion is movably coupled together with the second engaging portion,
To allow the anode only mobile relative to the shell in the length direction.
5. X-ray tube according to claim 4, wherein
One in first engaging portion and the second engaging portion includes the sliding groove extended in the length direction, and described the
Another in one engaging portion and the second engaging portion includes being maintained in the sliding groove and sliding along the length direction
Slide assemblies.
6. X-ray tube according to claim 5, wherein
The sliding groove includes:
Opening portion is recessed inwardly from one surface in first engaging portion and the second engaging portion；And
Constriction, from the side wall side of the opening portion to concave shape at, and
The slide assemblies include:
Linking arm is inserted into the opening portion；And
Restrained portion, it is vertical with the linking arm to connect and be mounted in the constriction, the slide assemblies are existed
It is only slided in the length direction in the sliding groove and the slide assemblies is prevented to be detached from the sliding groove.
7. X-ray tube according to claim 6, wherein
The sliding groove is formed on the anode, and the slide assemblies are fixed on the main part.
8. the X-ray tube according to any one of claim 4-7, wherein
The main part is equipped with through hole, anode connector is installed in the through hole or for making cable or cooling
The protection pipe of medium passes through the through hole.
9. X-ray tube described in any one of -8 according to claim 1, wherein
The shell has rough elongated hexahedral shape, and the hexahedron includes: to extend in the longitudinal direction simultaneously
The first side surface equipped with the Windows for drawing the X-ray, second side surface opposite with first side surface,
Upper surface, lower surface and two end surfaces；
The fixed device includes two device for fixing end part for being connected to the anode both ends, in two device for fixing end part
One is configured to allow for the anode mobile relative to the shell in the link position of one fixed device and shell.
10. X-ray tube according to claim 9, wherein the fixed device further includes that setting is solid two ends
Determine between device and at least one intermediate retainer on an upper is set.
11. X-ray tube according to claim 9 or 10, wherein two device for fixing end part are separately mounted to described
On upper surface and it is located near two ends of the shell.
12. X-ray tube described in any one of -8 according to claim 1, wherein
The shell has rough elongated hexahedral shape, and the hexahedron includes extending in the longitudinal direction and setting
There are the first side surface and upper surface of the Windows for drawing the X-ray；
The cathode includes multiple sub- cathodes being sequentially arranged,
The anode includes the sub- anode of multiple strips being sequentially arranged, and every sub- anode is configured to and respective sub- cathode
Alignment,
The fixed device setting on the upper surface, and is equipped with the fixed dress on each sub- anode
It sets, so that the distance between multiple positions of the generation electronic beam current of the sub- cathode and multiple target spots of the sub- anode are kept
Uniformly.
13. X-ray tube according to claim 12, wherein
The whole length-width ratio of the anode of the strip is greater than 10, and less than 10, preferential is no more than the length-width ratio of each sub- anode
5。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710524615.8A CN109216138B (en) | 2017-06-30 | 2017-06-30 | X-ray tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710524615.8A CN109216138B (en) | 2017-06-30 | 2017-06-30 | X-ray tube |
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| CN109216138B (en) | 2024-07-26 |
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