CN203690250U - Beryllium window - Google Patents
Beryllium window Download PDFInfo
- Publication number
- CN203690250U CN203690250U CN201320888719.4U CN201320888719U CN203690250U CN 203690250 U CN203690250 U CN 203690250U CN 201320888719 U CN201320888719 U CN 201320888719U CN 203690250 U CN203690250 U CN 203690250U
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- China
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- sealing
- beryllium window
- beryllium
- ring
- window
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- Expired - Fee Related
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Abstract
The utility model provides a beryllium window, which solves the technical problems in an existing beryllium window structure that sealing is poor and resistance to baking is poor. The beryllium window in the utility model comprises a sealing ring and a beryllium window slice disposed above the sealing ring, a layer of metallic nickel is coated in the edge sealing area on the lower surface of the beryllium window slice, and the edge sealing area on the lower surface of the beryllium window is welded to the sealing face of the sealing ring; and the layer of metallic nickel is electroplated on the edge sealing area of the beryllium window slice, so that invasion between the beryllium window slice and sealing and welding materials can be increased and sealing survival rate of the beryllium window can be effectively increased.
Description
Technical field
The utility model belongs to X ray image intensifier with beryllium window sealing-in field, is specifically related to a kind of beryllium window.
Background technology
X ray image intensifier is the core devices of portable X ray detector, X-ray machine vision system, and the instrument being made up of it is mainly used in the detection of human limb fracture inspection, wiring board and wiring board solder joint etc.The input window of X ray image intensifier selects the high metal material sealing-in to X ray transmitance to form conventionally.The input window that X ray image intensifier is conventional is Titanium window and aluminum window; because metallic beryllium is more much higher to the transmitance of X ray than Titanium, aluminium; obtaining required X ray intensity and the metering of image equally clearly all can be much lower; therefore being, is all best selection to personal safety and environmental protection employing metallic beryllium as the input window of X ray vacuum device.
Beryllium generally adopts brazing and diffusion welding method.But the titanium input window that the sealing-in of metallic beryllium window is commonly used relatively and the sealing-in of aluminum imput window can difficulties.Lead base sealing-in scolder and money base sealing-in scolder for soldering. but no matter be which kind of sealing-in scolder, all poor in beryllium wettability of the surface and mobility, and beryllium is easy to oxidation, increased the difficulty of beryllium window soldering.In addition, the soldering of beryllium window also should not be carried out at too high temperature, and beryllium is at high temperature easy to diffusion, forms the hole at brazed seam interface.
For X ray vacuum device, degas owing to needing that in manufacturing process device is carried out to about 400 DEG C bakings, therefore can only adopt the method for vacuum brazing to prepare X ray input window, can ensure its vacuum-tightness and ovenable roasting requirement simultaneously.Patent 200510040724.X mentions under the air-proof condition that the method that adopts gluing way to prepare beryllium window is only applicable to not need high-temperature baking and using.
Adopt conventional its sealing-in survival rate of titanium input window method for sealing sealing-in small size beryllium window extremely low, the sealing-in difficulty of large scale beryllium window is well imagined.
Summary of the invention
The purpose of this utility model is: a kind of beryllium window is provided, solves bad, the not ovenable roasting technical problem of existing beryllium window construction seal.
The utility model is achieved in that
A kind of beryllium window, comprises sealing ring and is placed in the beryllium window of sealing ring top, its special character is: the sealed edge region of beryllium window lower surface is coated with layer of metal nickel, the sealed edge region of beryllium window lower surface and the welding of the sealing surface of sealing ring.
Above-mentioned beryllium window also comprises the sealing-in shading ring that is positioned at beryllium window top, described beryllium window, sealing ring and sealing-in shading ring are coaxial, the sealed edge region of beryllium window upper surface is coated with layer of metal nickel, the sealed edge region welding of sealing-in shading ring and beryllium window upper surface.
The inward flange of the sealing surface of above-mentioned sealing ring is provided with chamfering.
The diameter of above-mentioned beryllium window is less than the outer peripheral diameter of sealing-in shading ring.
The utility model has the advantages that:
(1) the sealed edge region of beryllium window is electroplate with layer of metal nickel, can increase the wettability between beryllium window and sealing-in scolder, effectively improves the sealing-in survival rate of beryllium window.
(2) inward flange of the sealing surface of sealing ring is provided with chamfering, prevents that scolder is diffused into effective input face of beryllium window.
(3) diameter of beryllium window is slightly less than the diameter of sealing ring and sealing-in shading ring, can utilize the micro gap between sealing ring and sealing-in shading ring edge to produce capillarity and form good vacuum seal after solder fusing.
(4) utilize sealing-in locating ring sealing-in briquetting location can be prevented from causing after sealing-in solder fusing the movement of sealing-in briquetting and beryllium window.
(5) the utility model can be realized the vacuum seal sealing-in of large scale beryllium window.This sealing technology equally can be for the sealing-in of large scale titanium window, aluminum window.Be mainly used in the input window of X ray image intensifier, large head tube etc.
Brief description of the drawings
Fig. 1 is the structure cutaway view of the utility model embodiment mono-beryllium window;
Fig. 2 is the structure cutaway view of the utility model embodiment bis-beryllium windows;
Fig. 3 is the local enlarged diagram of beryllium window construction;
Fig. 4 is the method for sealing schematic diagram of the utility model beryllium window.
Wherein: 1-sealing-in briquetting; 2-sealing-in locating ring; 3-sealing-in base; 4-beryllium window; 41-sealing ring; 42-sealing-in shading ring; 43-sealing-in scolder; 44-beryllium window; 5-nickel; 6-chamfering.
Embodiment
Embodiment mono-, as Fig. 1, this beryllium window, comprises sealing ring 41 and is placed in the beryllium window 44 of sealing ring 41 tops, the sealed edge region of beryllium window 44 lower surfaces is coated with layer of metal nickel 5, the sealed edge region of beryllium window 44 lower surfaces and the welding of the sealing surface of sealing ring 41.
Embodiment bis-, as Fig. 2, this beryllium window also comprises the sealing-in shading ring 42 that is positioned at beryllium window 44 tops, described beryllium window 44, sealing ring 41 and sealing-in shading ring 42 are coaxial, the sealed edge region of beryllium window 44 upper surfaces is coated with layer of metal nickel 5, and sealing-in shading ring 42 welds with the sealed edge region of beryllium window 44 upper surfaces.
Preferably, the inward flange of the sealing surface of sealing ring 41 is provided with chamfering 6, prevents that scolder is diffused into effective input face of beryllium window.
Preferably, the diameter of beryllium window 44 is less than the outer peripheral diameter of sealing-in shading ring 42.After solder fusing, can utilize the micro gap between sealing ring and sealing-in shading ring edge to produce capillarity and form good vacuum seal.
The method of sealed Beryllium-windows under vacuum environment, comprises the following steps:
The sealing-in mold of beryllium window must clean up before the soldering of beryllium window.Sealing-in mold comprises sealing-in base 3, sealing-in locating ring 2 and sealing-in briquetting 1, the center of sealing-in base 3 is provided with location notch, location notch is used for holding sealing ring 41, sealing-in locating ring 2 fastens with sealing-in base 3, sealing-in locating ring 2 is for locating sealing-in briquetting 1, and fixing sealing-in briquetting 1 inserts in the ring of sealing-in locating ring 2.
There is one deck beryllium oxide film on the surface of beryllium window 44, can hinder the wetting of sealing-in scolder 43, therefore before the soldering of beryllium window, must remove.Beryllium window 44 washing lotion compositions are: chromic anhydride 50g, concentrated phosphoric acid 450mL, concentrated sulfuric acid 26mL.Beryllium window 44 immerses in this solution of 60 DEG C and soaks 1～3min, rinses dry for standby after taking-up with clear water well.
For the beryllium window of embodiment mono-, effective input face of the lower surface of the beryllium window 44 of removal oxide layer is coated with to protective paint, whole upper surface is coated with protective paint.At the sealed edge region of the lower surface of beryllium window plating layer of metal nickel; Sealing ring is placed in the location notch of sealing-in base, then sealing-in scolder is positioned over to the sealing surface place of sealing ring, the sealed edge region of beryllium window lower surface and sealing-in scolder position alignment; Sealing-in locating ring is fixed on sealing-in base, sealing-in briquetting is inserted in sealing-in locating ring, and be pressed on beryllium window; Start vacuum furnace, rise vacuum furnace bell jar, sealing-in base, sealing-in briquetting, sealing-in locating ring, beryllium window are positioned on vacuum furnace inner pallet as a whole, fall vacuum furnace bell jar, set beryllium window process for sealing program; Start beryllium window process for sealing program, complete successively vacuumize, system heats up, the step of insulation and cooling, completes the vacuum seal of beryllium window.Sealing-in vacuum degree is 3 × 10
-3pa; Heating-up time is 15 minutes, and holding temperature is 780～820 ° of C; Temperature retention time is 10～25 minutes.
For the beryllium window of embodiment bis-, effective input face of lower surface and effective input face of upper surface of the beryllium window 44 of removing oxide layer are coated with to protective paint.At the sealed edge region of lower surface and the sealed edge region of the upper surface plating layer of metal nickel of beryllium window; As Fig. 3 and 4, sealing ring 41 is placed in the location notch with the sealing-in base 3 of air discharge duct, then successively sealing-in scolder 43, beryllium window 44, sealing-in shading ring 42 are placed on the relevant position in sealing ring 41 and with sealing ring 41 and keep concentric, again sealing-in locating ring 2 is placed on sealing-in base 3, finally sealing-in briquetting 1 is inserted in sealing-in locating ring 2 and is pressed on sealing-in shading ring 42.Start vacuum furnace, rise vacuum furnace bell jar, sealing-in base, sealing-in briquetting, sealing-in locating ring, beryllium window are positioned on vacuum furnace inner pallet as a whole, fall vacuum furnace bell jar, set beryllium window process for sealing program; Start beryllium window process for sealing program, complete successively vacuumize, system heats up, the step of insulation and cooling, completes the vacuum seal of beryllium window.Sealing-in vacuum degree is 3 × 10
-3pa; Heating-up time is 15 minutes, and holding temperature is 780～820 ° of C; Temperature retention time is 10～25 minutes.
Sealing-in scolder 43 adopts AgCu28, and sealing-in scolder is the annulus of the wide 3mm of thick 0.1mm, and annulus external diameter is 16～106mm; The thickness of beryllium window 44 is 0.1～0.3mm, and diameter range is in 15～105mm; Sealing-in shading ring 42 thickness are 0.5mm～1mm, and the width of sealing-in shading ring 42 is 3mm～5mm, and sealing-in shading ring 42 internal diameters are 10mm～100mm, and the external diameter of sealing-in shading ring 42 is 16～106mm.
Claims (4)
1. a beryllium window, comprises sealing ring and is placed in the beryllium window of sealing ring top, it is characterized in that: the sealed edge region of beryllium window lower surface is coated with layer of metal nickel the sealed edge region of beryllium window lower surface and the welding of the sealing surface of sealing ring.
2. beryllium window according to claim 1, is characterized in that: the inward flange of the sealing surface of described sealing ring is provided with chamfering.
3. beryllium window according to claim 1 and 2, it is characterized in that: described beryllium window also comprises the sealing-in shading ring that is positioned at beryllium window top, described beryllium window, sealing ring and sealing-in shading ring are coaxial, the sealed edge region of beryllium window upper surface is coated with layer of metal nickel, the sealed edge region welding of sealing-in shading ring and beryllium window upper surface.
4. beryllium window according to claim 3, is characterized in that: the diameter of described beryllium window is less than the outer peripheral diameter of sealing-in shading ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888719.4U CN203690250U (en) | 2013-12-31 | 2013-12-31 | Beryllium window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888719.4U CN203690250U (en) | 2013-12-31 | 2013-12-31 | Beryllium window |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203690250U true CN203690250U (en) | 2014-07-02 |
Family
ID=51012122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888719.4U Expired - Fee Related CN203690250U (en) | 2013-12-31 | 2013-12-31 | Beryllium window |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203690250U (en) |
-
2013
- 2013-12-31 CN CN201320888719.4U patent/CN203690250U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20171231 |