CN207303037U - X ray tubes - Google Patents

Abstract

This application involves a kind of X-ray tube, with vacuum (-tight) housing (10), anode (12) and cathode (11) are disposed with the vacuum (-tight) housing, wherein described vacuum (-tight) housing (10) includes ray output window (14), closed by positive cathode lid (13) and has Pipe Flange (6) in the region of the ray output window (13), it is characterized in that, at least one plane of reference (18) is set on the end of the cathode side of the vacuum (-tight) housing (10), for the cathode (11) is axially aligned the anode (12)；And the cathode lid (13) has at least one calibrating element (19), for the cathode (11) is axially aligned with relative to the Pipe Flange (6).

Description

X-ray tube

Technical field

It the utility model is related to X-ray tube.

Background technology

Such X-ray tube has vacuum (-tight) housing, wherein being disposed with anode and cathode.The vacuum (-tight) housing include ray output window and Closed by positive cathode lid.In the region of ray output window, vacuum (-tight) housing has Pipe Flange.

Emission of cathode electronics, these electronics accelerate towards the direction of anode and generation X is penetrated when hitting the focal spot of anode material Line.The focal spot can be that static (erectting anode/fixed anode) either forms focal track (in rotating anode X-ray tube or rotation Turn a work rotating anode in plug X-ray tube).Caused X-ray is effectively penetrated using beam by ray output window as X-ray Line is projected from vacuum (-tight) housing, then passes through Pipe Flange, which is arranged in the ray output window area on the lateral surface of vacuum (-tight) housing Domain.The X-ray of center extension from the center of focal spot perpendicular to pipe axis and in effective rays beam is referred to here as central ray.

Vacuum (-tight) housing is completely by glass (glass tube), completely by metal (all metal tube), the combination (metal by metal and glass Stage casing manage) or by metal and ceramics combination (metal ceramic tube) be made.

At present, can be just that all metal tube or metal stage casing pipe calibrate central ray only under ray.Need for this Dedicated, high-tech equipment including lead cabin.The equipment and operating personnel are subject to limitation as defined in radiation protection.Therefore this sets It is standby usually to inspect periodically and operating personnel periodical training.Therefore this calibration is time-consuming.

Utility model content

The task of the utility model is to realize a kind of X-ray tube, its obvious calibration simplified to Pipe Flange.

According to the utility model by solving the task according to X-ray tube as described herein.X according to the present utility model is penetrated The preferable technical solution of spool is also the content of this paper.

X-ray tube according to the present utility model has vacuum (-tight) housing, and anode and cathode are disposed with the vacuum (-tight) housing, wherein should Vacuum (-tight) housing includes ray output window, closed by positive cathode lid and has Pipe Flange in the region of ray output window.According to The utility model, sets at least one plane of reference on the end of the cathode side of vacuum (-tight) housing, for cathode is axially registered to Anode, i.e., be aligned on the longitudinal axis of X-ray tube, and the cathode lid has at least one calibrating element, for opposite In the radially aligned cathode of Pipe Flange.

By the plane of reference on the end of the cathode side of vacuum (-tight) housing, cathode can easily axially align anode.It is because positive Pole axially and has been coaxially aligned in vacuum (-tight) housing, so being used to produce X-ray by axially aligning for cathode All components are mutually aligned and install in mechanical aspects in the vertical.Therefore, disappear in solution according to the present utility model Except tolerance chain occurring in the vertical, causing generation installation error.

Also needed for good picture quality, central ray for the central axial line of Pipe Flange collimation and because This for the central axial line of ray output window collimation in X-ray tube according to the present utility model it is reliable by calibrating element Realize on ground.

With known X-ray tube on the contrary, in X-ray tube according to the present utility model, it is no longer necessary to which pipe ray comes opposite Central ray is calibrated in Pipe Flange.Shielding can be used without by the calibration of this no ray and provided from radiation protection The installation equipment of constraint.The personnel to work by this installation equipment are equally no longer by constraint as defined in radiation protection.

X-ray tube according to the present utility model can relative to Pipe Flange calibrate central ray after in known manner by It is building up to X-ray cover (mainly only including X-ray tube) either single case cover (including X-ray tube and affiliated high voltage unit) or double In block (X-ray tube and heating transformer being included, but not including that high voltage unit).

According to a kind of advantageous embodiment, the plane of reference ring-type extension on the end for the cathode side for being arranged on vacuum (-tight) housing. Continuous surface is embodied as according to another technical solution, the plane of reference herein.In addition, the plane of reference can be range selector, that is, have Multiple single sections.

In the scope of the utility model, calibrating element can be arranged on the lateral surface of cathode lid or cathode lid it is interior On side.Especially advantageous technical solution is that the calibrating element is arranged on the lateral surface of cathode lid.

The calibrating element being arranged on the lateral surface of cathode lid is herein blind hole according to preferable technical solution.To this replacement Technical solution can be, calibrating element is also embodied as groove and either bolt or is embodied as form fit.

Brief description of the drawings

It is expanded on further the embodiment schematically shown below with respect to attached drawing, but the utility model not limited to this.Wherein：

Fig. 1 shows the longitudinal section of X-ray tube, and

Fig. 2 shows the front view of the X-ray tube according to Fig. 1.

Embodiment

With longitudinal section and the X-ray tube 2 that is illustrated in fig. 2 with facing is configured to metal stage casing pipe in Fig. 1, including it is true Sky cover 10, wherein being disposed with cathode 11 and anode 12.Vacuum (-tight) housing 10 is by 13 vacuum-tight closing of cathode lid.Cathode 11 launches electricity Son, these electronics accelerate towards the direction of anode 12 and when focal spot 30 in the material for hitting anode 12 produces X-ray.Anode 12 are embodied as rotary anode, so that focal spot 30 forms focal track.Anode 12 is installed on armature spindle 20 in a manner of anti-torsion for this, The armature spindle 20 is located in pipe axis 15 (longitudinal axis of X-ray tube 2 or vacuum (-tight) housing 10).Armature spindle 20 carries rotor 22, should Rotor 22 forms anode drive mechanism together with the stator not shown in Fig. 1.

Caused X-ray is penetrated from vacuum (-tight) housing 10 using beam by ray output window 14 as X-ray effective rays Go out.The X-ray of center extension from the center of focal spot 30 perpendicular to pipe axis 15 and in effective rays beam is referred to here as center Ray 16.

X-ray tube 2 has Pipe Flange 6 in the region of ray output window 14.In an illustrated embodiment, 6 ring of Pipe Flange Surround ray output window 14 shape.Therefore, which unhinderedly by ray output window 14 and can pass through pipe Flange 6 is projected from X-ray tube 2.

For good picture quality, all components for producing X-ray must be all mutually aligned and pacify in mechanical aspects Dress, wherein eliminating the tolerance chain for causing installation error occurred in the vertical.

In addition, for good picture quality, the central ray 16 of effective rays beam and the central axial line 61 of Pipe Flange 6 are necessary It is parallel to each other or overlaps.In the embodiment shown in figure 1, the central axial line 61 of Pipe Flange 6 is overlapped with central ray 16.

For these conditions of picture quality realized, according to the utility model in the end of the cathode side of vacuum (-tight) housing 10 On be provided with least one plane of reference 18, for cathode 11 is axially aligned anode 12, and cathode lid 13 is in outer side It is upper that there is at least one calibrating element 19, for cathode 11 is radially aligned relative to Pipe Flange 6.

In an illustrated embodiment, which is embodied as cricoid (Fig. 2).In addition, two are configured to blind hole (Fig. 1) Calibrating element 19 is arranged in cathode lid 13.

Cathode 11 easily can be axially aligned by anode by the plane of reference 18 on the end of the cathode side of vacuum (-tight) housing 10 12.Because anode 12 axially and has been coaxially aligned in vacuum (-tight) housing 10, by axially aligning the use of cathode 11 It is mutually aligned and installs in mechanical aspects in all component for producing X-ray.Therefore, solution according to the present utility model disappears Except the tolerance chain for causing to produce installation error occurred on longitudinal direction.

As shown in fig. 1, the plane of reference on the end for the cathode side that x1 is vacuum (-tight) housing 10 is measured in the calibration for anode 12 Spacing between 18 and the central ray 16 of effective rays beam.It is the spacing between cathode lid 13 and cathode 11 that x2 is measured in calibration. Therefore it is automatically adjusted to when cathode lid 13 and vacuum (-tight) housing 10 are connected between conforming with the regulations between cathode 11 and anode 12 Away from.The spacing is referred to as e spacing.

Although illustrate and describing the utility model by preferred embodiment in detail, the utility model is from public affairs The embodiment limitation opened, but other changes can be therefrom released by professional, without departing from the protection of the utility model Scope.

A kind of X-ray tube is the utility model is related to, it is disposed with anode 12 and cathode with vacuum (-tight) housing 10 in vacuum (-tight) housing 11, the wherein vacuum (-tight) housing 10 includes ray output window 14, is closed by positive cathode lid 13, and in the area of ray output window 14 There is Pipe Flange 6 in domain.According to the utility model, at least one plane of reference is set on the end of the cathode side of vacuum (-tight) housing 10 18, for cathode 11 is axially aligned anode 12, and cathode lid 13 has at least one calibrating element 19, for inciting somebody to action Cathode 11 is axially aligned with relative to Pipe Flange 6.In an illustrated embodiment, the arrangement calibration member on the lateral surface of cathode lid 13 Part 19., can be real by solution according to the present utility model as in the description according to illustrating shown embodiment Now central ray 16 is calibrated to Pipe Flange 6 without ray.

Claims (9)

1. a kind of X-ray tube, has vacuum (-tight) housing (10), anode (12) and cathode (11) is disposed with the vacuum (-tight) housing, wherein The vacuum (-tight) housing (10) includes ray output window (14), is closed and in the ray output window by positive cathode lid (13) (14) there is Pipe Flange (6) in region, it is characterised in that

At least one plane of reference (18) is set on the end of the cathode side of the vacuum (-tight) housing (10), for by the cathode (11) axially it is registered to the anode (12)；And

The cathode lid (13) has at least one calibrating element (19), for the cathode (11) is convex relative to the pipe Edge (6) is axially aligned with.

2. X-ray tube according to claim 1, it is characterised in that the plane of reference (18) annularly extends.

3. X-ray tube according to claim 1 or 2, it is characterised in that the plane of reference (18) is embodied as continuous surface.

4. X-ray tube according to claim 1 or 2, it is characterised in that the plane of reference (18) is range selector.

5. X-ray tube according to claim 1, it is characterised in that the calibrating element (19) is arranged in the cathode lid (13) on lateral surface.

6. X-ray tube according to claim 1 or 5, it is characterised in that the calibrating element (19) is blind hole.

7. X-ray tube according to claim 1 or 5, it is characterised in that the calibrating element (19) is groove.

8. X-ray tube according to claim 1 or 5, it is characterised in that the calibrating element (19) is bolt.

9. X-ray tube according to claim 1 or 5, it is characterised in that the calibrating element (19) is form fit.