CN208796944U - A kind of CT bulb cathode - Google Patents
A kind of CT bulb cathode Download PDFInfo
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- CN208796944U CN208796944U CN201821616528.1U CN201821616528U CN208796944U CN 208796944 U CN208796944 U CN 208796944U CN 201821616528 U CN201821616528 U CN 201821616528U CN 208796944 U CN208796944 U CN 208796944U
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- nickel cup
- bulb
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Abstract
A kind of CT bulb cathode, it can be cut down including pallet, cathode taps, cathode base, cathode loop, cathode tube, cathode, the first nickel cup, the second nickel cup, getter, filament and two heater leads, cathode taps, cathode tube are installed on pallet, cathode base is mounted in cathode taps, and cathode loop is socketed in outside cathode taps；Cathode can cut down lower end and be fixedly mounted in cathode tube, first nickel cup, the second nickel cup, getter are set in cathode tube, cathode base is equipped with filament fixation hole and two lead wiring holes, it is equipped with the first half porcelain beads and the second half porcelain beads in filament fixation hole, filament is fixed on cathode base by the gap between the first half porcelain beads and the second half porcelain beads；Ceramic dielectric is filled in each lead wiring hole, two heater leads are separately fixed in two lead wiring holes by ceramic dielectric and are separately connected with the respective end of filament.The available preferable focusing of electronics that filament emits in above-mentioned technical proposal, and then the problem more than scattered rays can be improved, improve image quality.
Description
Technical field
The utility model relates to CT bulb more particularly to a kind of CT bulb cathodes.
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 is made of anode head, anode cap, glass collar and anode handle,
Cathode is mainly made of filament, focus mask (or referred to as cathode taps), cathode sheath and glass stem etc..Its working principle is that: it uses
Filament made of tungsten wire can emit sufficient amount of electronics, as electron source at high temperature；Plus enough between anode, cathode
Voltage (kilovolt grade) formed strong electrical field, accelerate electronics to anode movement and form high-speed electron flow；The effect of anode is to inhale
Draw electronics and accelerate electronics, and make the target surface of the electron bombardment anode head of high-speed motion, target surface, which is subjected to electron bombardment, makes it sharply
It is obstructed and generates X-ray.The electrode system of entire X-ray tube is encapsulated in the glass shell of high vacuum, and glass shell is to support
Yin, yang the two poles of the earth simultaneously provide vacuum environment necessary to high-velocity electrons flight and high temperature filament normal work.Filament in the prior art
Cathode taps are usually directly loadable into, or are first fixed on filament on cathode base by molybdenum rod, are reloaded into cathode taps, filament transmitting
Electronics is not focused well, can generate more scattered rays, reduces image quality.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of CT bulb cathode, this CT bulb cathode can improve
Problem more than scattered rays improves image quality.The technical solution adopted is as follows:
A kind of CT bulb cathode, including pallet, cathode taps, cathode base, cathode loop, cathode tube, cathode can be cut down, the first nickel
Cup, the second nickel cup, getter, filament and two heater leads, cathode taps are mounted on the side of pallet, and cathode base is mounted on cathode
On head, cathode loop is socketed in outside cathode taps；Cathode tube is mounted on pallet and connect with cathode taps, and the lower end that cathode can be cut down is solid
Dingan County is on cathode tube, and the upper end that cathode can be cut down with the glass shell of the CT bulb for connecting；First nickel cup, the second nickel
Cup, getter are arranged on the inside of cathode tube, and the first nickel cup, the second nickel cup, which are socketed in cathode, can cut down outside, at the second nickel cup
In the top of the first nickel cup；It is characterized by: the cathode base is equipped with filament fixation hole and two lead wiring holes, filament are solid
Determine to be equipped with the first half porcelain beads and the second half porcelain beads in hole, the filament passes through the gap between the first half porcelain beads and the second half porcelain beads
It is fixed on cathode base；Ceramic dielectric is filled in each lead wiring hole, two heater leads pass through ceramic dielectric
It is separately fixed in two lead wiring holes and is separately connected with the respective end of filament.
Filament is fixed on cathode base by the gap between the first half porcelain beads and the second half porcelain beads, is reloaded into cathode taps
In, porcelain bead hardness is high, the available preferable focusing of electronics of filament transmitting, and then can improve the problem more than scattered rays, mentions
High imaging quality.Ceramic dielectric is filled in each lead wiring hole, ceramic dielectric is non-aging, high pressure resistant, high temperature resistant, into
One step improves the electromechanical properties of heater lead, and from being internally embedded into lead wiring hole, the thinner filament of line footpath draws heater lead
Line is not susceptible to external force and rotates distortion, to avoid damage to original seal interface, avoids generating X-ray tube gas leakage
Failure.The secondary electron energy that the target surface of anode head generates is larger, when striking on glass shell inner wall, can make glass shell temperature
Degree increases and releasing gas reduces vacuum degree in pipe, and getter can absorb the gas that CT bulb excites in the operating condition at this time,
Gas in CT bulb is minimized to improve vacuum degree, keeps CT bulb performance more stable.
As a preferred embodiment of the present invention, the cathode can be cut down including cathode fixing end and cathode closure, cathode
Closure is fixedly mounted in the cathode tube, and the lower end of cathode fixing end extend into cathode tube and connects with cathode closure
It connects, for connecting with the glass shell of the CT bulb, the first nickel cup, the second nickel cup are socketed for the upper end of cathode fixing end
Outside cathode fixing end.It is set as cathode fixing end and cathode closure by the way that cathode can be cut down, wherein cathode closure is straight
The middle and lower part being arranged in cathode tube is connect, realizes the preferable cathode fixing end for being tightly connected, and being used to weld with glass shell
It can then be made wide greatly, it is convenient to be connect with glass shell, and the whole center of gravity that cathode can be cut down moves down, whole stable structure
Property is more preferable.
As the further preferred embodiment of the utility model, the cathode fixing end is made of brass.The intensity height of brass,
Hardness is big, and has preferable heat dissipation performance, can generate a large amount of heat in the X-ray tube course of work, the yin being made of brass
Pole fixing end helps to radiate, and can avoid glass shell because of frit or fragmentation caused by temperature change, and then avoid vacuum
Situations such as degree decline or X-ray tube are scrapped.
As a preferred embodiment of the present invention, the side wall of the cathode base is equipped with locking through-hole, and cathode base passes through spiral shell
The cooperation of silk, locking through-hole is fixedly mounted in the cathode taps.
As a preferred embodiment of the present invention, the pallet, cathode taps, cathode base, cathode loop, cathode tube, the first nickel
Cup, the second nickel cup are made of nickel.
The utility model compared with prior art, has the advantages that
The first half porcelain beads and the second half porcelain beads are equipped in the filament fixation hole of cathode base, by filament by the first half porcelain beads and
Gap between the second half porcelain beads is fixed on cathode base, is reloaded into cathode taps, can be improved the problem more than scattered rays, is improved
Image quality.
Detailed description of the invention
Fig. 1 is the utility model structure diagram；
Fig. 2 is the A of Fig. 1 to cross-sectional view；
Fig. 3 is the structural schematic diagram of cathode base in Fig. 1；
Fig. 4 is the enlarged diagram of porcelain bead in Fig. 3.
Specific embodiment
It is described further with reference to the accompanying drawing with preferred embodiments of the present invention.
As shown in Figures 1 to 4, a kind of CT bulb cathode, including pallet 1, cathode taps 2, cathode base 3, cathode loop 4, cathode
Cylinder 5, cathode can cut down the 6, first nickel cup 7, the second nickel cup 8, getter 9, filament 10 and two heater leads 11, and cathode taps 2 are installed
In the side of pallet 1, cathode base 3 is mounted in cathode taps 2, and cathode loop 4 is socketed in 2 outside of cathode taps；Cathode tube 5 is mounted on support
Connect on disk 1 and with cathode taps 2, the lower end that cathode can cut down 6 is fixedly mounted on cathode tube 5, cathode can cut down 6 upper end be used for
The glass shell of CT bulb connects；First nickel cup 7, the second nickel cup 8, getter 9 are arranged at 5 inside of cathode tube, the first nickel cup
7, the second nickel cup 8, which is socketed in cathode, can cut down 6 outsides, and the second nickel cup 8 is in the top of the first nickel cup 7；Cathode base 3 is equipped with lamp
Silk fixation hole 301 and two lead wiring holes 302 is equipped with the first half porcelain beads 12 and the second half porcelain beads 13 in filament fixation hole 301,
Filament 10 is fixed on cathode base 3 by the gap between the first half porcelain beads 12 and the second half porcelain beads 13；Each lead wiring hole
Ceramic dielectric is filled in 302, two heater leads 11 are separately fixed in two lead wiring holes 302 by ceramic dielectric
And it is separately connected with the respective end of filament 10.
It includes cathode fixing end 601 and cathode closure 602 that above-mentioned cathode, which can cut down 6, and cathode closure 602 is fixedly mounted on
In cathode tube 5, the lower end of cathode fixing end 601 extend into cathode tube 5 and connect with cathode closure 602, cathode fixing end
For connecting with the glass shell of CT bulb, above-mentioned first nickel cup 7, the second nickel cup 8 are socketed in cathode fixing end for 601 upper end
601 outsides.It is set as cathode fixing end 601 and cathode closure 602 by the way that cathode can be cut down 6, wherein cathode closure 602 is straight
The middle and lower part being arranged in cathode tube 5 is connect, realizes the preferable cathode fixing end for being tightly connected, and being used to weld with glass shell
601 can be made wide greatly, convenient to connect with glass shell, and the whole center of gravity that cathode can cut down 6 moves down, whole structure
Stability is more preferable.
Above-mentioned cathode fixing end 601 is made of brass.The intensity of brass is high, hardness is big, and has preferable heat dissipation performance,
A large amount of heat can be generated in the X-ray tube course of work, the cathode fixing end 601 being made of brass helps to radiate, and can avoid
Glass shell avoids vacuum degree from declining or situations such as X-ray tube is scrapped because of frit or fragmentation caused by temperature change.
The side wall of above-mentioned cathode base 3 is equipped with locking through-hole 303, the cooperation that cathode base 3 passes through screw, locking through-hole 303
It is fixedly mounted in cathode taps 2.
Above-mentioned pallet 1, cathode taps 2, cathode base 3, cathode loop 4, cathode tube 5, the first nickel cup 7, the second nickel cup 8 are by nickel system
At.
Filament 10 is fixed on cathode base 3 by the gap between the first half porcelain beads 12 and the second half porcelain beads 13, is refilled
Enter in cathode taps 2, porcelain bead hardness is high, the available preferable focusing of electronics that filament 10 emits, and then can improve scattered rays
More problems improves image quality.Ceramic dielectric is filled in each lead wiring hole 302, ceramic dielectric is non-aging, resistance to
High pressure, high temperature resistant further increase the electromechanical properties of heater lead 11, and heater lead 11 is from being internally embedded lead wiring hole
In 302, the thinner heater lead 11 of line footpath is not susceptible to external force and rotates distortion, to avoid damage to original sealing
Interface avoids generating X-ray tube air leakage failure.The secondary electron energy that the target surface of anode head generates is larger, when striking glass
On outer casing inner wall, glass shell temperature can be made to increase and release gas reduction and manage interior vacuum degree, getter 9 can absorb CT ball at this time
The gas excited in the operating condition is managed, gas in CT bulb is minimized to improve vacuum degree, makes CT bulb performance more
Stablize.
In addition, it should be noted that, the specific embodiments described in this specification, each section title etc. can not
Together, all equivalent or simple changes done according to structure, feature and principle described in the concept of the patent of the utility model are included in this
In the protection scope of utility model patent.Those skilled in the art of the present invention can be to described specific reality
Example is applied to do various modifications or additions or be substituted in a similar manner, structure without departing from the utility model or
Beyond the scope defined by this claim, it all should belong to the protection range of the utility model.
Claims (5)
1. a kind of CT bulb cathode, including pallet, cathode taps, cathode base, cathode loop, cathode tube, cathode can be cut down, the first nickel cup,
Second nickel cup, getter, filament and two heater leads, cathode taps are mounted on the side of pallet, and cathode base is mounted on cathode taps
On, cathode loop is socketed in outside cathode taps；Cathode tube is mounted on pallet and connect with cathode taps, and the lower end that cathode can be cut down is fixed
It is mounted on cathode tube, the upper end that cathode can be cut down with the glass shell of the CT bulb for connecting；First nickel cup, the second nickel
Cup, getter are arranged on the inside of cathode tube, and the first nickel cup, the second nickel cup, which are socketed in cathode, can cut down outside, at the second nickel cup
In the top of the first nickel cup；It is characterized by: the cathode base is equipped with filament fixation hole and two lead wiring holes, filament are solid
Determine to be equipped with the first half porcelain beads and the second half porcelain beads in hole, the filament passes through the gap between the first half porcelain beads and the second half porcelain beads
It is fixed on cathode base；Ceramic dielectric is filled in each lead wiring hole, two heater leads pass through ceramic dielectric
It is separately fixed in two lead wiring holes and is separately connected with the respective end of filament.
2. CT bulb cathode as described in claim 1, it is characterized in that: the cathode can be cut down including cathode fixing end and cathode envelope
Fitting, cathode closure are fixedly mounted in the cathode tube, and the lower end of cathode fixing end is extend into cathode tube and and cathode
Closure connection, the upper end of cathode fixing end with the glass shell of the CT bulb for connecting, the first nickel cup, the second nickel
Cup is socketed in outside cathode fixing end.
3. CT bulb cathode as claimed in claim 2, it is characterized in that: the cathode fixing end is made of brass.
4. CT bulb cathode as described in claim 1, it is characterized in that: the side wall of the cathode base is equipped with locking through-hole, yin
Pole piece is fixedly mounted in the cathode taps by the cooperation of screw, locking through-hole.
5. CT bulb cathode as described in claim 1, it is characterized in that: the pallet, cathode taps, cathode base, cathode loop, cathode
Cylinder, the first nickel cup, the second nickel cup are made of nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821616528.1U CN208796944U (en) | 2018-09-30 | 2018-09-30 | A kind of CT bulb cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821616528.1U CN208796944U (en) | 2018-09-30 | 2018-09-30 | A kind of CT bulb cathode |
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| Publication Number | Publication Date |
|---|---|
| CN208796944U true CN208796944U (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821616528.1U Active CN208796944U (en) | 2018-09-30 | 2018-09-30 | A kind of CT bulb cathode |
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| CN (1) | CN208796944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993469A (en) * | 2019-12-26 | 2020-04-10 | 珠海瑞能真空电子有限公司 | Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device |
-
2018
- 2018-09-30 CN CN201821616528.1U patent/CN208796944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993469A (en) * | 2019-12-26 | 2020-04-10 | 珠海瑞能真空电子有限公司 | Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device |
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