CN109273335A - A kind of metal and glass sealing process of CT bulb - Google Patents
A kind of metal and glass sealing process of CT bulb Download PDFInfo
- Publication number
- CN109273335A CN109273335A CN201811154735.4A CN201811154735A CN109273335A CN 109273335 A CN109273335 A CN 109273335A CN 201811154735 A CN201811154735 A CN 201811154735A CN 109273335 A CN109273335 A CN 109273335A
- Authority
- CN
- China
- Prior art keywords
- glass
- metal
- kovar ring
- metal kovar
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/16—Vessels; Containers; Shields associated therewith
- H01J35/165—Vessels; Containers; Shields associated therewith joining connectors to the tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/26—Sealing together parts of vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Joining Of Glass To Other Materials (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The invention discloses the metals and glass sealing process of a kind of CT bulb, including the other glass bar to for sealing-in, glass tube and metal kovar ring are cleaned, annealing in hydrogen atmosphere processing is carried out to metal kovar ring, melten glass is wound to metal kovar ring, metal kovar ring is docked with glass tube, the several steps of sintering annealing, the beneficial effects of the present invention are, before glass tube and the docking of metal kovar ring, first on the inner side edge edge of metal kovar ring opening and outer side edges along the glass for winding upper one layer of molten condition, glass tube is set directly to dock with the glass of metal kovar ring opening, to which metal kovar ring be sealed with glass tube, the difficulty of metal kovar ring Yu glass tube sealing-in is effectively reduced, it is round and smooth bright and clean at the sealing-in of metal kovar ring and glass tube simultaneously, one integrated mass, fusion degree and intensity are high, to effectively improve CT ball The service life of pipe.
Description
Technical field
The present invention relates to process for sealing, in particular to a kind of the metal and glass sealing process of CT bulb.
Background technique
CT machine is a kind of multiple functional condition detection instrument, and with the development of technology, CT machine is with high resolution and directly
See, accurate diagnosis effect and popularized, be widely used in medical field.CT bulb, also referred to as X-ray
Pipe, is the core component in CT machine, and for generating X-ray, the technical perfection of CT bulb whether directly affects the work effect of CT machine
Fruit.X-ray tube mainly includes anode, cathode and glass shell, and anode includes target disc, shaft, rotor and bearing, and cathode includes lamp
Silk, cathode taps and cathode stem.Its working principle is that: the filament made of tungsten wire can emit sufficient amount of electricity at high temperature
Son, as electron source；Under the forceful electric power field action formed between anode, cathode plus the high pressure by tens kilovolts to several hundred kilovolts,
Accelerate electronics and forms high-speed electron flow；The effect of anode is to attract electronics and accelerate electronics, and bang the electronics of high-speed motion
Hit target disc target surface, target surface is subjected to electron bombardment it is made sharply to be obstructed generating X-ray.The electrode system of entire X-ray tube is encapsulated in
In the glass shell of high vacuum, glass shell to support yin, yang the two poles of the earth and provide high-velocity electrons flight and high temperature filament it is normal
Vacuum environment necessary to working.
Required vacuum environment when in order to guarantee the work of CT bulb, the rotor of CT bulb anode need to connect with glass shell
Connect, if but glass shell directly connect with rotor, such as use rivet interlacement, temperature generate variation or rotor high speed rotation
When, the interface of rotor and glass shell is easy to produce crack or fragmentation, therefore current CT bulb is usually to pass through metal
Kovar ring realizes the connection between rotor and glass shell.Current general connection method is in metal kovar ring one end and rotor
Bearing insert connection, the other end of metal kovar ring connect with glass shell, and metal kovar ring is swollen with glass by the coefficient of expansion
The alloy of swollen coefficient similar is made, to avoid that glass shell is made to be easy to produce crack or fragmentation in interface because of temperature change.
Currently, glass shell and metal kovar ring are first connect glass tube and metal kovar ring by high temperature in sealing-in
The end of metal kovar ring, is then pressed into the end face of glass tube, or directly adopt internal diameter and be slightly larger than by contact portion point softening
The glass pipe sleeve of metal kovar ring outer diameter is on metal kovar ring, to be attached, reaches the gastight purpose of interface.But
It is that this sealing-in mode is difficult to ensure accurately the end of metal kovar ring can be pressed into the end face of glass tube in operation, and
And either using metal kovar ring end be pressed into the end face of glass tube in or use glass tube be directly sleeved on metal can
The mode on circle, operating difficulties are cut down, connecting portion rough surface needs subsequent increase process to remove corner angle and burr, glass
Glass pipe and the fusion degree of metal kovar ring be not high, so that CT bulb is at work, the envelope of glass shell and metal kovar ring
It connects position to be easily broken off, the service life of CT bulb is not grown.
Summary of the invention
The problem to be solved by the invention is to provide the metal and glass sealing process of a kind of CT bulb, reduce metal with
The sealing-in difficulty of glass, while metal and glass the sealing-in surface of position after sealing-in are smooth, fusion degree and intensity are high, improve CT
The service life of bulb.
In order to solve the above-mentioned technical problem, the technical solution adopted is as follows:
A kind of metal and glass sealing process of CT bulb, it is characterised in that include the following steps:
(1) it is cleaned respectively to for the glass bar of sealing-in, glass tube and metal kovar ring；
(2) annealing in hydrogen atmosphere processing is carried out to metal kovar ring；
(3) metal kovar ring winds melten glass: the end of glass bar is heated to molten condition at 550-800 DEG C, and
The opening of metal kovar ring is heated at 750-900 DEG C to be then heated to molten condition using end close to molten condition
Glass bar in the inner side edge edge that metal kovar ring is open and outer side edges along the glass for winding upper one layer of molten condition；
(4) metal kovar ring is docked with glass tube: glass tube opening being heated at 500-650 DEG C until glass tube opening is soft
Change, then docks glass tube opening edge along the glass with metal kovar ring opening edge along molten condition, then in 600-960
20-30min is heated at DEG C, melts glass tube opening sufficiently mutually with the glass that metal kovar ring is open；
(5) sintering annealing: the sintering temperature of glass tube opening and metal kovar ring opening is gradually decreased until room temperature, completes gold
Belong to the sealing-in of kovar ring and glass tube；
(6) metal kovar ring oxide layer remained on surface is disposed.
It is above-mentioned dispose metal kovar ring oxide layer remained on surface can be used chemistry mode handled, can also adopt
The method manually polished is handled.
Above-mentioned process for sealing uses glass bar to wind the glass of molten condition at metal kovar ring first, so that glass
It is closer in conjunction with the surface of metal kovar ring, but can play the role of transition connection, enable softening glass tube directly with gold
Belong to the glass docking of kovar ring opening molten condition, then reheating melts glass tube and the glass phase of metal kovar ring, thus
Metal kovar ring is sealed with glass tube, avoids glass tube after directly heating molten condition, under molten condition
Glass nozzle is easy to deform due to gravity sagging, it is difficult to be aligned with the edge of metal kovar ring, metal kovar ring is effectively reduced
With the difficulty of glass tube sealing-in, while round and smooth bright and clean, one integrated mass at the sealing-in of metal kovar ring and glass tube, fusion degree and
Intensity is high, to effectively improve the service life of CT bulb；In addition, annealing in hydrogen atmosphere processing is carried out to metal kovar ring before sealing-in,
Make metal can headband superficial decarbonization, to avoid when subsequent high temperature sealing-in generating stain at sealing-in position and destroying whole jail
Solidity and leakproofness；And when the inner side edge edge of metal kovar ring opening and outer side edges are along winding glass, to metal kovar ring
Opening is heated to close to molten condition (being transition state between solid and molten condition close to molten condition), this shape
It can be avoided under state and form oxide layer in the position, and make the metallic atom at this quite active, it can be with molten condition
Glass interpenetrated, metal kovar ring is easier with melten glass ining conjunction with, and in conjunction with even closer after annealing, into one
Step improves the fastness and leakproofness after sealing-in；There are also after sealing-in completion, metal kovar ring oxygen remained on surface is disposed
Change layer, avoids at sealing-in the glass with falling off for oxide layer.
In preferred embodiment, in the step (1), using dehydrated alcohol as cleaning solution to glass bar and glass tube inside and outside
Wall is cleaned, and is cleaned using acetone as inside and outside wall of the cleaning solution to metal kovar ring.By cleaning to remove glass
Oxide, grease and the dust of glass stick, glass tube and metal kovar ring surface.
In preferred embodiment, in the step (2), annealing in hydrogen atmosphere processing is metal kovar ring to be placed in hydrogen furnace and using hydrogen
Gas is calcined, and is then made annealing treatment under conditions of lasting inputting hydrogen.Metal kovar ring is entire in hydrogen furnace
In calcining and annealing process, carried out under the protection of hydrogen stream, be conducive to metal kovar ring superficial decarbonization, under high temperature due to
The diffusion of hydrogen atom, other gases inside hydrogen substituted metal kovar ring, plays the role of exhaust, and sealing-in position is made to combine jail
Gu air-tightness is good.
In preferred embodiment, in the step (3), the time to the opening heat treatment of metal kovar ring is 8-15min.
In further preferred embodiment, glass bar is open to metal kovar ring in the step (3) inner side edge edge, outside
Edge winds the glass of upper molten condition, until the glass on inner side edge edge, outer side edges edge converges to form glassy layer.
In preferred embodiment, the material of the metal kovar ring is teleoseal.
The beneficial effects of the present invention are: the metal of this CT bulb and the process for sealing of glass effectively reduce metal
With the sealing-in difficulty of glass, while metal and glass the sealing-in surface of position after sealing-in are smooth, air-tightness is good, fusion degree and strong
Degree is high, improves the service life of CT bulb.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that metal kovar ring winds melten glass in the embodiment of the present invention；
Fig. 2 is structural schematic diagram when metal kovar ring is docked with glass tube in the embodiment of the present invention；
Fig. 3 is that the structural schematic diagram after sealing-in is completed in metal kovar ring and glass tube sealing-in in the embodiment of the present invention.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments:
The metal and glass sealing process of a kind of CT bulb as shown in Figs. 1-3, include the following steps:
(1) glass bar, glass tube 1 and the metal kovar ring 2 for sealing-in are cleaned respectively: using dehydrated alcohol as clear
Washing lotion cleans the inside and outside wall of glass bar and glass tube 1, using acetone as cleaning solution to the inside and outside wall of metal kovar ring 2
It is cleaned.By cleaning to remove oxide, grease and the dust on 2 surface of glass bar, glass tube 1 and metal kovar ring；
(2) carry out annealing in hydrogen atmosphere processing to metal kovar ring 2: annealing in hydrogen atmosphere processing is that metal kovar ring 2 is placed in hydrogen furnace and is used
Hydrogen is calcined, and is then made annealing treatment under conditions of lasting inputting hydrogen.Metal kovar ring 2 is whole in hydrogen furnace
In a calcining and annealing process, all it is to be carried out under the protection of hydrogen stream, is conducive to 2 superficial decarbonization of metal kovar ring, under high temperature
Due to the diffusion of hydrogen atom, other gases inside hydrogen substituted metal kovar ring 2 play the role of exhaust, make sealing-in position
It is firmly combined, air-tightness is good.
(3) metal kovar ring 2 winds melten glass: the end of glass bar is heated to molten condition at 550-800 DEG C,
And heat treatment 8-15min is carried out to the opening of metal kovar ring 2 at 750-900 DEG C, until the opening of metal kovar ring 2
In close to molten condition, the inner side edge that the glass bar of molten condition is open in metal kovar ring 2 then is heated to using end
Edge and outer side edges are along the glass for winding upper one layer of molten condition, until the glass on inner side edge edge, outer side edges edge converges to form glass
Layer 3.
(4) metal kovar ring 2 is docked with glass tube 1: the opening of glass tube 1 is heated at 500-650 DEG C until glass tube 1
Opening softening then carries out 1 opening edge of glass tube pair along with 2 opening edge of metal kovar ring along the glassy layer 3 of molten condition
It connects, then heats 20-30min at 600-960 DEG C, melt the opening of glass tube 1 sufficiently mutually with the glass that metal kovar ring 2 is open；
(5) sintering annealing: the opening of glass tube 1 is gradually decreased with the sintering temperature of 2 opening of metal kovar ring until room temperature, is completed
The sealing-in of metal kovar ring 2 and glass tube 1；
(6) metal kovar ring oxide layer remained on surface is disposed.
Further, the material of the metal kovar ring 2 is teleoseal.
Claims (6)
1. a kind of metal and glass sealing process of CT bulb, it is characterised in that include the following steps:
(1) it is cleaned respectively to for the glass bar of sealing-in, glass tube and metal kovar ring；
(2) annealing in hydrogen atmosphere processing is carried out to metal kovar ring；
(3) metal kovar ring winds melten glass: the end of glass bar is heated to molten condition at 550-800 DEG C, and
The opening of metal kovar ring is heated at 750-900 DEG C to be then heated to molten condition using end close to molten condition
Glass bar in the inner side edge edge that metal kovar ring is open and outer side edges along the glass for winding upper one layer of molten condition；
(4) metal kovar ring is docked with glass tube: glass tube opening being heated at 500-650 DEG C until glass tube opening is soft
Change, then docks glass tube opening edge along the glass with metal kovar ring opening edge along molten condition, then in 600-960
20-30min is heated at DEG C, melts glass tube opening sufficiently mutually with the glass that metal kovar ring is open；
(5) sintering annealing: the sintering temperature of glass tube opening and metal kovar ring opening is gradually decreased until room temperature, completes gold
Belong to the sealing-in of kovar ring and glass tube；
(6) metal kovar ring oxide layer remained on surface is disposed.
2. a kind of metal of CT bulb as described in claim 1 and the process for sealing of glass, it is characterised in that: the step
(1) it in, is cleaned using dehydrated alcohol as inside and outside wall of the cleaning solution to glass bar and glass tube, using acetone as cleaning
Liquid cleans the inside and outside wall of metal kovar ring.
3. a kind of metal of CT bulb as described in claim 1 and the process for sealing of glass, it is characterised in that: the step
(2) in, annealing in hydrogen atmosphere processing is that metal kovar ring is placed in hydrogen furnace and is calcined using hydrogen, then in lasting input hydrogen
It is made annealing treatment under conditions of gas.
4. a kind of metal of CT bulb as described in claim 1 and the process for sealing of glass, it is characterised in that: the step
(3) in, the time heated to the opening of metal kovar ring is 8-15min.
5. a kind of metal of CT bulb as claimed in claim 4 and the process for sealing of glass, it is characterised in that: the step
(3) glass on glass bar is open to metal kovar ring in inner side edge edge, the upper molten condition of outer side edges edge winding, until inner side edge
Glass along, outer side edges edge converges to form glassy layer.
6. a kind of metal of CT bulb as described in claim 1 and the process for sealing of glass, it is characterised in that: the metal can
The material for cutting down circle is teleoseal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154735.4A CN109273335B (en) | 2018-09-30 | 2018-09-30 | Metal and glass sealing process for CT bulb tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154735.4A CN109273335B (en) | 2018-09-30 | 2018-09-30 | Metal and glass sealing process for CT bulb tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109273335A true CN109273335A (en) | 2019-01-25 |
| CN109273335B CN109273335B (en) | 2020-10-13 |
Family
ID=65196323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811154735.4A Active CN109273335B (en) | 2018-09-30 | 2018-09-30 | Metal and glass sealing process for CT bulb tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109273335B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417584A (en) * | 2022-09-16 | 2022-12-02 | 珠海瑞能真空电子有限公司 | Manufacturing process of CT bulb tube |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798184A (en) * | 2010-02-26 | 2010-08-11 | 北京天瑞星真空技术开发有限公司 | Sealing connection method of metal and glass of novel medium-high temperature solar energy heat collection pipe |
| CN202434460U (en) * | 2011-12-21 | 2012-09-12 | 王建军 | Environmental-friendly CT (Computed Tomography) metal X-ray tube |
| CN102838292A (en) * | 2012-10-08 | 2012-12-26 | 北京工业大学 | Glass-metal sealing structure of high-temperature collector tube |
| CN202993623U (en) * | 2012-11-21 | 2013-06-12 | 山东禄禧新能源科技有限公司 | Metal heat tube type vacuum solar collector tube utilizing sealing technology |
| CN103408220A (en) * | 2013-07-13 | 2013-11-27 | 北京工业大学 | Trench type photo-thermal utilization high-temperature heat collection pipe end head sealing structure |
-
2018
- 2018-09-30 CN CN201811154735.4A patent/CN109273335B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798184A (en) * | 2010-02-26 | 2010-08-11 | 北京天瑞星真空技术开发有限公司 | Sealing connection method of metal and glass of novel medium-high temperature solar energy heat collection pipe |
| CN202434460U (en) * | 2011-12-21 | 2012-09-12 | 王建军 | Environmental-friendly CT (Computed Tomography) metal X-ray tube |
| CN102838292A (en) * | 2012-10-08 | 2012-12-26 | 北京工业大学 | Glass-metal sealing structure of high-temperature collector tube |
| CN202993623U (en) * | 2012-11-21 | 2013-06-12 | 山东禄禧新能源科技有限公司 | Metal heat tube type vacuum solar collector tube utilizing sealing technology |
| CN103408220A (en) * | 2013-07-13 | 2013-11-27 | 北京工业大学 | Trench type photo-thermal utilization high-temperature heat collection pipe end head sealing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417584A (en) * | 2022-09-16 | 2022-12-02 | 珠海瑞能真空电子有限公司 | Manufacturing process of CT bulb tube |
| CN115417584B (en) * | 2022-09-16 | 2023-03-21 | 珠海瑞能真空电子有限公司 | Manufacturing process of CT bulb tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109273335B (en) | 2020-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109243948A (en) | A kind of high stability CT bulb | |
| CN109273335A (en) | A kind of metal and glass sealing process of CT bulb | |
| CN107706072B (en) | The indium encapsulation method and prepared photomultiplier tube of photomultiplier tube based on cathode transfer equipment | |
| CN107265889A (en) | A kind of vacuum pumping method of vacuum glass | |
| CN106636586B (en) | Vacuum-tight container and vacuum sealing method, vacuum heat-treating method | |
| CN208796949U (en) | A kind of high stability CT bulb | |
| CN115148562A (en) | Firing process and firing equipment for X-ray tube | |
| US5733162A (en) | Method for manufacturing x-ray tubes | |
| CN209087760U (en) | A kind of CT tube filament with lead | |
| CN101390181A (en) | Furnace-made feedthrough featuring wrap-around glass-to-metal seal | |
| CN216015286U (en) | Rotary anode X-ray tube bearing fixing device | |
| CN220324404U (en) | Glass bulb suitable for high-power | |
| CN205645749U (en) | Be used in high withstand voltage inflatable collector on travelling wave tube | |
| JP4306110B2 (en) | Open X-ray tube | |
| CN112062454B (en) | Energy-saving vacuum fritting furnace for manufacturing vacuum glass | |
| CN208796947U (en) | A kind of high speed rotor sub-assembly of CT bulb | |
| US5722870A (en) | System and method for manufacturing x-ray tubes having glass envelopes | |
| JPH06169850A (en) | Metallic vacuum double container and its manufacture | |
| US5722868A (en) | System and method for manufacturing x-ray tubes having glass envelopes utilizing a metal disk | |
| US2715691A (en) | Vapor discharge lamp | |
| CN109767965B (en) | X-ray tube electrode device and manufacturing method thereof | |
| CN215910649U (en) | High-sensitivity geiger counter probe | |
| US5628664A (en) | System for manufacturing x-ray tubes | |
| JPH1173884A (en) | Manufacture of cathode-ray tube and heating device | |
| US5722869A (en) | System and method for manufacturing x-ray tubes having metal envelopes utilizing a metal disk |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |