CN102110566B - X ray tube - Google Patents
X ray tube Download PDFInfo
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- CN102110566B CN102110566B CN2010100044213A CN201010004421A CN102110566B CN 102110566 B CN102110566 B CN 102110566B CN 2010100044213 A CN2010100044213 A CN 2010100044213A CN 201010004421 A CN201010004421 A CN 201010004421A CN 102110566 B CN102110566 B CN 102110566B
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- ray tube
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- sealing device
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Abstract
The invention relates to an X ray tube which comprises a shell, a second flange and a sealing device, wherein the shell comprises a first opening positioned at one end of the shell, a second opening positioned at the other end of the shell and an X ray tube positioned in the shell, and the shell is filled with insulating pressure-resistant oil; the second flange is connected to the second opening of the shell; the sealing device is positioned outside the shell and is connected to the first opening of the shell; the sealing device comprises a telescopic tube, an end cover connected to a first orifice of the telescopic tube and a first flange connected to a second orifice of the telescopic tube; the telescopic tube, the end cover and the first flange are made of metal materials; the first flange also comprises at least one through hole; and the insulating pressure-resistant oil is fully filled in the telescopic tube via the through hole. The sealing device is made of the metal materials, and the metal materials have the advantages of long service life and reliable structure, thereby solving the problems of poor reliability and short service life of the sealing device made of rubber materials.
Description
Technical field
The present invention relates to Xray fluorescence spectrometer and make field, particularly a kind of X-ray tube.
Background technology
Xray fluorescence spectrometer is a kind of X-ray analysis instrument commonly used, is widely used in metallurgy, geology and scientific research field.
X-ray tube is the important component part of Xray fluorescence spectrometer, mainly comprises: housing is positioned at the X-ray pipe of housing and is positioned at the sealing device of shell nozzle.Said X-ray pipe is the parts that are used to produce X ray, and the metal target surface of the electronics that the filament of X-ray tube cathode is launched impinge anode after high pressure quickens produces X ray.Comprise window on the said housing, mixing that the X-ray pipe produces shielded by housing to ray, only penetrates the X ray of single pack from window.Said sealing device is used for housing, is positioned at the component-assembled such as X-ray pipe of housing and seals.
In order to produce X ray, need the X-ray pipe is applied the voltage of tens thousand of volts; And high-velocity electrons bombardments metal target surface can produce a large amount of heats, so also comprises in the X-ray tube and be used to the parts that insulate and dispel the heat.At present, in housing, being full of dielectric voltage withstand oil, is one of insulation measures the most effectively.
Yet, in the production process of X ray, being in the dielectric voltage withstand oil meeting expanded by heating of sealing state, the dielectric voltage withstand oil of expansion can produce big pressure to the window of sealing device and housing.Said big pressure can make on the one hand that sealing device is poorly sealed and produce leakage of oil, and on the other hand, the window of housing also can be owing to can not bearing too high pressure, and have influence on the job stability of X-ray tube, reduces the life-span of X-ray tube.
For eliminating or reduce the oily pressure that is produced of dielectric voltage withstand of expanded by heating, prior art has proposed multiple solution.For example, application number is that 200710073898.5 one Chinese patent application discloses a kind of sealing device.With reference to figure 1, show the sketch map of said sealing device.Said sealing device comprises mainly that end face seal ring flange 5, vacuum hole disappear and presses rubber 1, caulking gum pad 4 and screw 3.An end face of wherein said end face seal ring flange 5 has the sealing cannelure, and said vacuum disappears and presses rubber 1 to comprise a plurality of vacuum chambers, and said vacuum hole disappears and presses rubber 1 to adhere to said end face center with sealing cannelure through adhesive glue 7.During sealing; Said caulking gum pad 4 is positioned in the sealing cannelure of said end face seal ring flange 5; Disappear the end face of the end face seal ring flange 5 of pressing rubber 1 towards housing 2 with being stained with vacuum hole; With screw 3 end face seal ring flange 5 is fixed on the housing 2 of X-ray tube, compresses caulking gum pad 4 simultaneously, realize sealing.Because disappearing, vacuum hole press rubber 1 to comprise a plurality of vacuum chambers; So disappearing, vacuum hole presses rubber 1 smaller volume when being stressed; The temperature part that dielectric voltage withstand oil 6 volumes cause increase that raises like this; Disappear by vacuum hole and to press rubber 1 volume to reduce to offset, and then eliminated the pressure that dielectric voltage withstand oil 6 is produced.
With reference to figure 2, show the sketch map of the another kind of sealing device of prior art.Said sealing device mainly comprises end cap 11 and rubber cap 13.During sealing, rubber cap 13 is sticked on housing 14 inwalls, with the dielectric voltage withstand oil seal in housing 14.The adhesion locations of said rubber cap 13 has certain distance apart from housing 14 openings; Afterwards end cap 11 is covered on the opening surface of housing 14; Weld with housing 14; Between end cap 11 and rubber cap 13, form space 12 like this, dielectric voltage withstand oil expanded by heating makes rubber cap 13 stress deformations, space 12 smaller volume.So the part that the dielectric voltage withstand oil volume that the temperature rising causes increases is reduced to offset by space 12 volumes, and then eliminated the pressure that dielectric voltage withstand oil is produced.
But the sealing device of above-mentioned prior art of giving an example still exists poor reliability, short problem of life-span.
Summary of the invention
The problem that the present invention solves provides a kind of X-ray tube, avoids sealing device poor reliability, life-span weak point.
For addressing the above problem; The present invention provides a kind of X-ray tube, and said X-ray tube comprises: housing, said housing comprise first opening that is positioned at housing one end and second opening that is positioned at the housing other end; Be positioned at the X-ray pipe of housing, be full of dielectric voltage withstand oil in the said housing; Second ring flange is connected in housing second opening; Sealing device is positioned at outside the housing, and said sealing device comprises telescoping tube; Be connected in the end cap of telescoping tube first mouth of pipe; With first ring flange that is connected in telescoping tube second mouth of pipe, said telescoping tube, end cap and first ring flange are metal materials, and said first ring flange is connected in housing first opening; Also comprise at least one through hole in said first ring flange, said dielectric voltage withstand oil is full of said telescoping tube via said through hole.
Optional, said first ring flange and telescoping tube second mouth of pipe are for being welded to connect.
Optional, the said end cap and telescoping tube first mouth of pipe are for being welded to connect.
Optional, said end cap is identical with the shape and the area of telescoping tube first mouth of pipe.
Optional, said X-ray tube also comprises and covering in outside the said X-ray pipe, is positioned at the insulating cover within the housing, and said insulating cover comprises thread protrusion towards the position of first ring flange; The said first ring flange center also comprises screw, and the thread protrusion of said screw and insulating cover is supporting.
Optional, said first ring flange comprises plural through hole, said through hole evenly is arranged in around the said screw.
Optional, said X-ray tube also comprises and being placed in outside the insulating cover, is positioned at the insulating case of housing.
Optional, comprising a plurality of screws on the end face of said first opening, the card edge of said first ring flange also comprises the supporting flange hole of screw on a plurality of and first open end, said screw is connected through screw with said flange hole.
Compared with prior art; Technique scheme has the following advantages: said X-ray tube comprises sealing device, and said sealing device is positioned at outside the housing and with housing and communicates, and said sealing device comprises telescoping tube; Under the effect of dielectric voltage withstand oil pressure that expanded by heating produces; Telescoping tube stretches vertically, has increased the volume of sealing device, eliminates the pressure in the X-ray tube; Said sealing device is processed by metal material, and service life of metal material is long, reliability is high.
Description of drawings
Fig. 1 is the generalized section of a kind of X-ray tube sealing device of prior art;
Fig. 2 is the generalized section of the another kind of X-ray tube sealing device of prior art;
Fig. 3 is the assembling sketch map of a kind of embodiment of X-ray tube of the present invention;
Fig. 4 is the explosive view of a kind of embodiment of X-ray tube shown in Figure 3;
Fig. 5 A is the generalized section of sealing device in the X-ray tube shown in Figure 3;
Fig. 5 B is the generalized section of the telescoping tube extended configuration of sealing device in the X-ray tube shown in Figure 3;
Fig. 5 C is the generalized section of the telescoping tube compressive state of sealing device in the X-ray tube shown in Figure 3;
Fig. 6 is the volume change and the temperature relation curve chart of sealing device in the X-ray tube shown in Figure 3.
Embodiment
To discovering of prior art, the sealing device of prior art X-ray tube has adopted elastomeric material in order to eliminate pressure.But the elastomeric material life-span is short, it is aging to be prone to, and this makes sealing device poorly sealed, causes leakage of oil, so existing sealing device poor reliability, life-span are shorter.
Based on this, X-ray tube of the present invention adopts metal material structure sealing device, to evade the easy problem of aging of elastomeric material.
In conjunction with Fig. 3 and Fig. 4, show assembling sketch map and the structure exploded perspective view of a kind of embodiment of X-ray tube of the present invention respectively.
Said X-ray tube comprises: housing 30, said housing 30 comprise first opening that is positioned at housing 30 1 ends and second opening that is positioned at housing 30 other ends, are positioned at the X-ray pipe 40 of housing 30, are full of dielectric voltage withstand oil (figure does not show) in the said housing 30; Be positioned at outside the housing 30, and be connected in the sealing device 20 of housing 30 first openings; And second ring flange 50 that is connected in housing 30 second openings.
Said housing 30 comprises the cylindrical metal thin-walled, is used to shield the spuious ray that X-ray pipe 40 sends.In two openings of said housing 30, near X-ray pipe 40 anodes be first opening, near X-ray pipe 40 negative electrodes are second openings.Include a plurality of screws on the end face of said first opening and second opening, the screw on said first open end is used for being connected with said sealing device 20, and the screw on said second open end is used for being connected with second ring flange 50.Preferable, said screw evenly distributes on the end face of said first, second opening.
Fig. 5 A shows the generalized section of said sealing device 20.In conjunction with Fig. 4 and Fig. 5 A, said sealing device 20 comprises telescoping tube 21, is connected in the end cap 22 of telescoping tube 21 first mouths of pipe and is connected in first ring flange 23 of telescoping tube 21 second mouths of pipe, and said telescoping tube 21, end cap 22 and first ring flange 23 are metal materials.
Said telescoping tube 21 is axisymmetric cylindrical housings, and telescoping tube 21 can stretch or compress under external force vertically.Said telescoping tube 21 adopts the flexible metal material, for example can be the metal material of austenitic stainless steel, tin bronze and beryllium-bronze etc.The tube wall of said telescoping tube 21 can have axial wrinkle, and in the present embodiment, the tube wall wrinkle of said telescoping tube 21 are V-arrangements, can also be U type, S type etc.
Said end cap 22 is the thin type metalworks that are used to seal said first mouth of pipe, can adopt stainless steel, the metal material of copper etc.Said thin type metalwork need have certain area and shape, can cover first mouth of pipe of said telescoping tube 21 fully.Preferably, the area of said end cap 22 is identical with said first mouth of pipe with shape, and at this moment, said end cap 22 just covers said first mouth of pipe fully, can save material, reduces volume.Said end cap 22 is connected through welding manner with said first mouth of pipe, and welding manner can be realized good sealing and fixed effect, also can adopt other modes.
Said first ring flange 23 can adopt stainless steel, the metal material of copper etc.Said first ring flange 23 comprises corresponding joint face and sealing surface, and said joint face is used for being connected with second mouth of pipe of telescoping tube 21, and for example said joint face is connected with welding manner with second mouth of pipe of telescoping tube 21.Said sealing surface is connected with first opening of said housing 30.Said sealing surface edge comprises a plurality of flange holes 24, and the screw on the said flange hole 24 and first open end is supporting.The screw that screw passes on the said flange hole 24 and first open end is fixed together, thereby realizes that the sealing surface of first ring flange 23 is fixedly connected with said housing 30.Said first ring flange 23 also comprises the through hole 25 that is positioned at the centre, connects joint face and sealing surface.Dielectric voltage withstand oil (figure does not show) can be full of said telescoping tube 21 via said through hole 25.
When said sealing device did not receive external force, telescoping tube was in the nature (shown in Fig. 5 A) that does not stretch or do not compress.Under external force, telescoping tube 21 stretches (shown in Fig. 5 B) or telescoping tube 21 vertically and compresses (shown in Fig. 5 C) vertically
Produce a large amount of heats in the process of X-ray pipe 40 emission X ray, this makes the dielectric voltage withstand oil expanded by heating that is full of housing 30 and sealing device 20, and the dielectric voltage withstand oil of expansion produces pressure.Because housing 30 itself is a rigid body, and is rigidly connected with second ring flange 50, so can flow into telescoping tube 21 via through hole 25 behind the dielectric voltage withstand oil expanded by heating in the housing 30.When dielectric voltage withstand oil is full of telescoping tube 21, can produce pressure to end cap 22, telescoping tube 21 is stretched vertically, end cap 22 is ejected with respect to the script position.The telescoping tube 21 that is in extended state has increased the volume of sealing device 20, and the volume of increase has been cleared up the oily pressure that is produced of the dielectric voltage withstand that expands, thereby in X-ray tube, realizes disappearing pressure.
With reference to figure 6, show the volume change of sealing device and the graph of relation of temperature.Can find out by said curve chart, when temperature when 30 ℃ raise gradually, the volume change of sealing device obviously increases, when 5 milliliters (ml) during from 30 ℃ have been increased to 70 ℃ 25 milliliters.The volume that increases has been eliminated the pressure that dielectric voltage withstand oil expands and produces.
Continue to combine Fig. 4 and Fig. 5 A, said X-ray tube also comprises and covering in outside the said X-ray pipe 40, is positioned at the insulating cover 31 within the housing 30, and said insulating cover 31 comprises thread protrusion towards the position of first ring flange 23; Said first ring flange 23 centers also comprise screw 26, and said screw 26 is supporting with the thread protrusion of insulating cover 31.Concrete, through thread protrusion and screw 26 are fixed together, said insulating cover 31 are fixed on first ring flange 23, thereby are fixed in the housing 30.
Preferable; Comprise a plurality of through holes 25 in said first ring flange 23, said a plurality of through holes 25 be evenly distributed on screw 26 around, said equally distributed a plurality of through holes 25; So that the circulation of dielectric voltage withstand oil between housing 30 and the sealing device 20, and then help to realize disappearing fast pressure.
Also be equipped with insulating case 32 in the housing 30 of said X-ray tube, said insulating case 32 is placed in outside the insulating cover 31, is positioned within the housing 30.
Said X-ray tube also comprises thermal component.For example, be not described further at this at the anode of X-ray pipe 40 and the thermal component of the thermal column between the insulating cover 31, cooling pad etc.
In addition, usually X-ray tube fitting tight at normal temperatures and pressures, when X-ray tube was in the higher operational environment of air pressure, because inner and outer air pressure difference, X-ray tube can bear big pressure, and it is impaired easily that especially the window on the housing bears big pressure.And the sealing device of X-ray tube of the present invention; Under extraneous pressure by air pressure; Telescoping tube compresses vertically, and the telescoping tube that is in compressive state has reduced the volume of sealing device, the housing internal gas pressure rising that makes sealing device and communicate with it; The inside and outside air pressure balance of X-ray tube has like this been avoided inner and outer air pressure difference and has been caused the problem that the housing window is impaired.Otherwise in the lower operational environment of air pressure, telescoping tube can stretch vertically, with the balance inner and outer air pressure.
In sum, the sealing device of X-ray tube of the present invention adopts metal material, and the life-span is long, and reliability is high, and can eliminate the pressure that dielectric voltage withstand oil expanded by heating produces on the one hand, and X-ray tube is worked in the environment of non-normal pressure.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (8)
1. an X-ray tube is characterized in that, said X-ray tube comprises:
Housing, said housing comprise first opening that is positioned at housing one end and second opening that is positioned at the housing other end, are positioned at the X-ray pipe of housing, are full of dielectric voltage withstand oil in the said housing;
Second ring flange is connected in housing second opening;
Sealing device is positioned at outside the housing, and said sealing device comprises telescoping tube; Be connected in the end cap of telescoping tube first mouth of pipe; With first ring flange that is connected in telescoping tube second mouth of pipe, said telescoping tube, end cap and first ring flange are metal materials, and said first ring flange is connected in housing first opening; Also comprise at least one through hole in said first ring flange, said dielectric voltage withstand oil is full of said telescoping tube via said through hole.
2. X-ray tube as claimed in claim 1 is characterized in that, said first ring flange and telescoping tube second mouth of pipe are for being welded to connect.
3. X-ray tube as claimed in claim 1 is characterized in that, the said end cap and telescoping tube first mouth of pipe are for being welded to connect.
4. X-ray tube as claimed in claim 1 is characterized in that, said end cap is identical with the shape and the area of telescoping tube first mouth of pipe.
5. X-ray tube as claimed in claim 1 is characterized in that, said X-ray tube also comprises and covering in outside the said X-ray pipe, is positioned at the insulating cover within the housing, and said insulating cover comprises thread protrusion towards the position of first ring flange; The said first ring flange center also comprises screw, and the thread protrusion of said screw and insulating cover is supporting.
6. X-ray tube as claimed in claim 5 is characterized in that, said first ring flange comprises plural through hole, and said through hole evenly is arranged in around the said screw.
7. X-ray tube as claimed in claim 5 is characterized in that, said X-ray tube also comprises and being placed in outside the insulating cover, is positioned at the insulating case of housing.
8. X-ray tube as claimed in claim 1; It is characterized in that; Comprise a plurality of screws on the end face of said first opening, the card edge of said first ring flange also comprises the supporting flange hole of screw on a plurality of and first open end, and said screw is connected through screw with said flange hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100044213A CN102110566B (en) | 2009-12-24 | 2010-01-15 | X ray tube |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910265712 | 2009-12-24 | ||
| CN200910265712.5 | 2009-12-24 | ||
| CN2010100044213A CN102110566B (en) | 2009-12-24 | 2010-01-15 | X ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102110566A CN102110566A (en) | 2011-06-29 |
| CN102110566B true CN102110566B (en) | 2012-08-22 |
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ID=44174687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100044213A Active CN102110566B (en) | 2009-12-24 | 2010-01-15 | X ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102110566B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6218403B2 (en) * | 2013-03-15 | 2017-10-25 | 株式会社マーストーケンソリューション | X-ray tube equipped with a field emission electron gun and X-ray inspection apparatus using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2161262Y (en) * | 1993-05-07 | 1994-04-13 | 北京市轮勤医学工程技术研究所 | Half-closed type X-ray tube head |
| CN2247811Y (en) * | 1996-05-31 | 1997-02-19 | 北京科电高技术公司 | Portable flash X-ray tester |
| CN1711008A (en) * | 2005-07-15 | 2005-12-21 | 北京中盾安民分析技术有限公司 | Sectional-drum-shape X-ray source |
-
2010
- 2010-01-15 CN CN2010100044213A patent/CN102110566B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2161262Y (en) * | 1993-05-07 | 1994-04-13 | 北京市轮勤医学工程技术研究所 | Half-closed type X-ray tube head |
| CN2247811Y (en) * | 1996-05-31 | 1997-02-19 | 北京科电高技术公司 | Portable flash X-ray tester |
| CN1711008A (en) * | 2005-07-15 | 2005-12-21 | 北京中盾安民分析技术有限公司 | Sectional-drum-shape X-ray source |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-135295A 1999.05.21 |
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| Publication number | Publication date |
|---|---|
| CN102110566A (en) | 2011-06-29 |
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