CN208077937U - A kind of annular X-ray emitter of fixed electron gun - Google Patents

Abstract

The utility model discloses a kind of annular X-ray emitter of fixed electron gun, includes the electron gun of multiple settings circumferentially fixed in ring vaccum chamber, the anode scoring ring of fixed setting, and the detector rings being coaxially disposed side by side with anode scoring ring.Setting has the anode target cooling water channel and detector cooling water channel of annular respectively in the ring body of anode scoring ring and detector rings.The fixed metallic target of the utility model annular no longer carries out the rotation of high speed around axle center, to make the stressing conditions of metallic target greatly improve.The heat that metallic target generates is taken away export by the coolant liquid in the cooling pipe of annular, solves the problems, such as that the overheat of metallic target and thermal capacity are limited, to enable X-ray emitter to continuously send out ray for a long time so that metallic target is hardly damaged.Since endless metal target no longer rotates, metallic target is hardly damaged so that the service life of X-ray emitter is greatly improved.

Description

A kind of annular X-ray emitter of fixed electron gun

Technical field

The utility model belongs to technical field of medical equipment, is sent out more particularly to a kind of annular X-ray of fixed electron gun Raw device.

Background technology

In medical imaging field, X-ray emitter is the core equipment of X ray image equipment.X-ray emitter generates X After ray, Radiolucent object, later the ray through overdamping get on detector, detector receive X-ray simultaneously generate figure As data.

The basic principle of X-ray emitter is that the electronics that electron gun generates passes through the acceleration of electric field, is beaten later in metallic target On（This metallic target is generally tungsten alloy）, make the free electron of the part of atoms on metallic target to high energy order transition later, subsequently This high level free electron discharges photon to low energy order transition.This photon is x-ray photon.In above structure, electronics Rifle and metallic target are encapsulated in a glass container, are vacuum state in container.

Among the above process, about 1 percent conversions of electric energy are fully entered for X-ray, remaining 90 about percent Nine energy converts for heat.Therefore in order to lasting generation X-ray, metallic target has prodigious thermal capacity, Huo Zhejin Belong to the heat generated on target to allow for quickly conducting.Due to one of the electronics constant bombardment metallic target after acceleration The temperature in the region of very little, this region can be very high, and prolonged bombardment can lead to metal evaporation herein, influence follow-up X and penetrate The generation of line.In order to solve the problems, such as this, metallic target has been designed to discoid and can be rotatable about an axis, and allows electron beam to exist with this The bombarded point of metallic target becomes toroid.But it is difficult export that the problem of thus bringing, which is the heat generated on rotating metallic target, （Ensure to allow heat that can continue to export while persistently rotation）.So the problem of bringing is, X-ray emitter cannot continue to grow The work of time, meanwhile, in order to ensure the lasting unwrapping wire of a period of time, the volume of metallic target is bigger, is ensured with this bigger Thermal capacity.The above problem results in that X-ray emitter volume is big, and weight is big, cannot continue unwrapping wire for a long time.Simultaneously because The shell of vacuum chamber is glass material, easily broken, and metallic target wants long-time high speed rotation when working, and metallic target is fragile, into And result in X-ray emitter and integrally easily damage, service life is very short.

Utility model content

The utility model aim is that in view of the drawbacks of the prior art, heat, type discharge can quickly be exported by providing one kind Line, the annular X-ray emitter of fixed electron gun with long service life.

The utility model to achieve the above object, adopts the following technical scheme that：

A kind of annular X-ray emitter of fixed electron gun, including electron gun, anode scoring ring and detector rings, feature It is：The anode scoring ring fixed setting；The electron gun is multiple, the circumferentially fixed setting in ring vaccum chamber.

It is further characterized by：The electron gun is circumferential in ring vaccum chamber uniformly or non-uniformly to be arranged.

Further：It is provided with annular cooling water road in the ring body of the anode scoring ring and/or detector rings.

The electron gun is fixed on electron gun supporting rack.

The electron gun supporting rack is located in vacuum (-tight) housing ring, and the vacuum (-tight) housing ring cooperatively forms the annular with anode scoring ring Vacuum chamber.

There is ray window ring, ray window ring outgoing described in X-ray transparent on the vacuum (-tight) housing ring inner wall.

The X-ray of outgoing forms X-ray covering of the fan；Multiple entire detector rings of X-ray covering of the fan covering Search coverage.

The ring vaccum chamber, anode scoring ring and detector rings are coaxially disposed side by side.

The electron beam of the electron gun transmitting, to directive anode scoring ring, is penetrated along the anode target annulate shaft after X ray excited To the search coverage of the detector rings opposite with incoming position.

Preferably：The electron gun is 6.

The utility model tool has the advantage that：

1. solving the problems, such as that metallic target is easily damaged.Metallic target used in the utility model is the fixed metal of annular Target, since metallic target no longer carries out the rotation of high speed around axle center, to make the stressing conditions of metallic target greatly improve.

2. solving the problems, such as that X-ray emitter metallic target is not easy quickly to export heat.Used in the utility model The cooling pipe of annular is built-in in endless metal target, cooling pipe is connected with extraneous radiator, cold in cooling pipe But liquid takes away the heat that metallic target generates, and heat is dissipated in environment by extraneous radiator.It is generated on metallic target Heat is rapidly exported so that metallic target is hardly damaged.

3. solving the problems, such as that X-ray emitter can not continue unwrapping wire for a long time.The utility model due to the use of The fixation metallic target of annular, the coolant liquid in metallic target can rapidly export the heat that metallic target generates, and solve metal The limited problem of the overheat and thermal capacity of target, to enable X-ray emitter to continuously send out ray for a long time.

4. solving the problems, such as X-ray emitter short life.The endless metal target of the utility model no longer rotates, metallic target It is hardly damaged so that the service life of X-ray emitter is greatly improved.

Description of the drawings

Fig. 1 is the utility model structure diagram.

Fig. 2,3 are the utility model section schematic diagram.

Wherein, 1- electron guns；2- anode scoring rings；3- detector rings；4- electron gun supporting racks；5- vacuum (-tight) housing rings；6-X rays Covering of the fan；7- ray window rings；21- anode target cooling water channels；31- detector cooling water channels.

Specific implementation mode

As shown in Figs. 1-3, a kind of annular X-ray emitter of fixed electron gun, including it is multiple all in ring vaccum chamber To the electron gun 1 of fixed setting, the anode scoring ring 2 and detector rings 3 of fixed setting.Ring vaccum chamber, anode scoring ring 2 and spy Device ring 3 is surveyed to be coaxially disposed side by side.The anode target cooling water of annular is respectively arranged in the ring body of anode scoring ring 2 and detector rings 3 Road 21 and detector cooling water channel 31.

Electron gun 1 is fixed on electron gun supporting rack 4.Electron gun supporting rack 4 is located in vacuum (-tight) housing ring 5, vacuum (-tight) housing Ring 5 cooperatively forms ring vaccum chamber with anode scoring ring 2.The electron beam that electron gun 1 emits is along the axial directive anode of anode scoring ring 2 Scoring ring 2, the search coverage of the X ray excited rear directive detector rings 3 opposite with incoming position.Have on 5 inner wall of vacuum (-tight) housing ring Ray window ring 7, X-ray transparent ray window ring 7 are emitted.The X-ray of outgoing forms X-ray covering of the fan 6；Multiple X-ray covering of the fans 6 cover The search coverage of entire detector rings 3.

Preferably：The electron gun 1 is 6, is evenly arranged on electron gun supporting rack 4.

Metallic target used in the utility model is endless metal target, there is the cooling pipe of annular in endless metal target.It is cold But the coolant liquid in pipeline takes away rapidly the heat that metallic target generates.Electron gun is fixed on electron gun fixed frame, electron gun Fixed frame is fixed on the circumference along endless metal target in the inside of X-ray emitter shell, multiple electron guns and its fixed frame Direction is arranged.The stressing conditions of metallic target are made greatly to improve so that metallic target is hardly damaged.X-ray emitter shell will be annular Metallic target, electron gun fixed frame, electron gun wrap up, and in the outlet of X-ray, there are one X-ray window, X-ray window is fixed on On the shell of X-ray emitter.Above-mentioned multiple X electron guns time division emission electronics successively, to make to divide successively on metal ring target When generate X-ray on different positions.Metal evaporation caused by prevent constant bombardment metallic target the same area.

Claims (10)

1. a kind of annular X-ray emitter of fixed electron gun, including electron gun, anode scoring ring and detector rings, feature exist In：The anode scoring ring fixed setting；The electron gun is multiple, the circumferentially fixed setting in ring vaccum chamber.

2. the annular X-ray emitter of fixed electron gun as described in claim 1, it is characterised in that：The electron gun is in ring It is circumferential in shape vacuum chamber uniformly or non-uniformly to arrange.

3. the annular X-ray emitter of fixed electron gun as claimed in claim 1 or 2, it is characterised in that：The anode scoring ring And/or annular cooling water road is provided in the ring body of detector rings.

4. the annular X-ray emitter of fixed electron gun as claimed in claim 1 or 2, it is characterised in that：The electron gun is solid It is fixed to be arranged on electron gun supporting rack.

5. the annular X-ray emitter of fixed electron gun as claimed in claim 4, it is characterised in that：The electron gun support Frame is located in vacuum (-tight) housing ring, and the vacuum (-tight) housing ring cooperatively forms the ring vaccum chamber with anode scoring ring.

6. the annular X-ray emitter of fixed electron gun as claimed in claim 5, it is characterised in that：In the vacuum (-tight) housing ring There is ray window ring, ray window ring outgoing described in X-ray transparent on wall.

7. the annular X-ray emitter of fixed electron gun as claimed in claim 6, it is characterised in that：The X-ray of outgoing Form X-ray covering of the fan；The search coverage of multiple entire detector rings of X-ray covering of the fan covering.

8. the annular X-ray emitter of fixed electron gun as claimed in claim 1 or 2, it is characterised in that：The ring vaccum Chamber, anode scoring ring and detector rings are coaxially disposed side by side.

9. the annular X-ray emitter of fixed electron gun as claimed in claim 8, it is characterised in that：The electron gun transmitting Electron beam along the anode target annulate shaft to directive anode scoring ring, it is X ray excited after the directive detection opposite with incoming position The search coverage of device ring.

10. the annular X-ray emitter of fixed electron gun as claimed in claim 1 or 2, it is characterised in that：The electron gun It is 6.