CN212517111U - Shielding fairing for a ray tube - Google Patents

Abstract

The utility model discloses a shielding radome fairing for ray tube, including the whole cover body that is the tube-shape, the one end of the cover body is sealed and is formed the connecting plate, and other end opening forms and holds the end, is provided with the interface that is used for installing high-voltage socket on the connecting plate. The utility model discloses the cover body that is the tube-shape with a whole forms overall structure with the connecting plate, then be provided with an interface that is used for installing high-pressure socket on the connecting plate, install high-pressure socket in the interface, during the use, primary ray and secondary ray in the ray tube are when using the insulating part of high-pressure socket, at first can be through the reflection shield effect of the shield cover body, the ray volume of bombardment on insulating part has significantly reduced, thereby its life has been improved, stability has also greatly increased, it is unexpected to make people, through setting up the cover body, in the use, shield behind primary ray and the secondary ray, it is better to have the directionality after most ray their jets out, the mesh of removing the impurity has been reached.

Description

Shielding fairing for a ray tube

Technical Field

The utility model relates to an ionizing radiation irradiation equipment technical field, concretely relates to shielding radome fairing for ray tube.

Background

Vacuum electronic device for generating X-ray by using high-speed electrons to impact metal target surface. The X-ray tube can be classified into a gas tube and a vacuum tube according to the manner of generating electrons. X-ray tube inflatable X-ray tubes were early X-ray tubes. In 1895, X-rays were found in kruse tube experiments performed by w.c. roentgen. The kruse tube was the earliest gas-filled X-ray tube. After the tube is connected with high voltage, the gas in the tube is ionized, electrons escape from the cathode under the bombardment of positive ions, and the electrons are accelerated and then impact on a target surface to generate X rays. The inflatable X-ray tube has small power, short service life and difficult control, and is rarely applied later. In 1913, a vacuum X-ray tube was invented by w.d. kuligi. The vacuum degree in the tube is not lower than 10-4 Pa. The cathode is a directly-heated spiral tungsten wire, and the anode is a metal target inlaid on the end face of a copper block. The target material and the electron beam energy are chosen according to the use of the tube, tungsten being commonly used as the target material. In some applications, silver, palladium, rhodium, molybdenum, copper, nickel, cobalt, iron, chromium, and the like are also used. The working temperature of the cathode is about 2000K, and emitted electrons are accelerated by tens of thousands to hundreds of thousands of volts and then impact the target surface. The cathode is surrounded by a metal hood which is slotted at the front end. The metal shield is at a potential equal to or lower than the cathode, forcing the electrons to focus in a narrow region on the target surface, forming a focal spot. The X-rays radiate from the focal spot in all directions and exit through a window in the wall of the tube. The window is typically made of beryllium, aluminum, or lightweight glass, with beryllium being the best.

The ray tube has been widely applied in the fields of industry, medical treatment and the like, and has achieved great social and economic benefits. The reliability and radiation uniformity of a tube are important indicators of its performance. On the one hand, a large amount of rays (including primary rays and various secondary rays) generated by the tube during operation can bombard the insulation part of the tube, and the insulation damage can be caused by long-time action, so that the reliability of the tube is seriously affected, such as a large amount of electrons and photons generated by the tube during operation, especially a large-dose tube, and the internal radiation bombardment environment is complicated. On the other hand, the structure of the tube is complicated, so that the electric field distribution in the tube is not uniform, the distribution of charged particle beams is not uniform, the beam target effect is not uniform, and the radiation uniformity of the tube is seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a shielding radome fairing for ray tube solves among the prior art short problem of ray tube life-span.

The utility model discloses a following technical scheme realizes:

a shielding fairing for a ray tube comprises a cylindrical hood body, wherein one end of the hood body is sealed to form a connecting plate, the other end of the hood body is opened to form an accommodating end, and an interface used for mounting a high-voltage socket is arranged on the connecting plate. In the prior art, because in the using process, a large amount of electrons and photons are generated while the generated X-rays are generated, the radiation bombardment environment in the ray tube is very complex, the emitted X-rays, the electrons and the photons are easily acted on the insulating part of the high-voltage socket, long-time primary rays and various secondary rays are bombarded on the insulating part, the insulating property of the insulating part can be damaged, and the reliability of the ray tube is seriously influenced, the inventor of the utility model finds that the ray bombardment effect is a determining factor for determining the service life of a single ray tube after years of research, finds that the problem is solved by adopting a mode of arranging a shielding fairing after years of research, a cover body which is integrally cylindrical is formed into an integral structure with a connecting plate, then an interface for installing the high-voltage socket is arranged on the connecting plate, and the high-voltage socket is installed in the interface, during the use, primary ray and secondary ray in the ray tube are when the insulating part of using high voltage socket, at first can be through the reflection and the absorption shielding effect of the shield cover body, the radiation dose of bombardment on insulating part has significantly reduced, thereby its life has been improved, stability has also greatly been increased, it is unexpected that, through setting up the cover body, in the use, after having shielded primary ray and secondary ray, it is better to have the directionality of most its back of penetrating of ray, the mesh of going miscellaneous has been reached.

The connecting plate is bent towards the outer side of the cover body to form a spherical surface structure, and the diameter of the spherical surface is 6-8 times of that of the cover body. Through multiple researches, the applicant improves the connecting plate at the end part of the cover body, and the connecting plate is arranged into a spherical structure which is bent outwards, so that the electric field distribution in the ray tube can be effectively adjusted, the charged particle beam is more uniform, and when the diameter of the spherical surface is 6-8 times of that of the cover body, the uniformity of the charged particle beam is improved by 20-50% compared with that of a flat plate structure.

The opening end of the cover body is turned outwards to form a convex ring body. Through setting up the bulge loop body, be favorable to holistic stamping forming, also bear the marginal position of ray bombardment as the cover body moreover, through the setting of bulge loop body, can solve the bombardment and to holistic vibrations effect, set solid cylinder structure to with the thin slice structure at marginal position, greatly increased holistic anti-seismic capacity.

The position on the axis of the cover body at which the length from the connecting plate is the entire length 1/3 is the position at which the wall thickness of the cover body is the smallest, and the wall thickness of the cover body gradually decreases from both ends to the position at which the thickness is the smallest. Through research, the wall thickness of the mask body has certain shielding effect on X-rays within a certain range after the shape of the mask body is determined, and how to set the shape of the mask body is the key of the processing technology, and through trial production of tens of thousands of samples, the applicant finds the optimal structure: the wall thickness of the cover body reduces gradually from both ends to the position that thickness is minimum, and minimum position is 1/3 department of axis length, can form better shielding effect, and the machine-shaping technology that can do benefit to the cover body is set up to such wall thickness moreover, and the yield is very high, and such structure has an advantage yet: under the same shielding parameter requirement, the material consumption is the least, and the lowest cost can be achieved.

The surface roughness of the outer side of the cover body is superior to Ra0.1, and the surface roughness of the inner side of the cover body is superior to Ra0.4. According to actual experimental tests, the applicant finds that the surface smoothness, namely roughness of the cover body has great influence on the ray shielding effect, the shielding effect can be greatly improved by setting the surface roughness of the outer side of the cover body to be better than Ra0.1, the surface smoothness of the inner part of the cover body is not so high, and the conventional requirement can be met when the surface smoothness reaches Ra0.4.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model relates to a shielding fairing for a ray tube, which adopts a mode of arranging a shielding fairing to solve the problems, and a whole cylindrical cover body and a connecting plate form an integral structure, then an interface used for installing a high-voltage socket is arranged on the connecting plate, the high-voltage socket is installed in the interface, when in use, when the primary rays and the secondary rays in the ray tube act on the insulating part of the high-voltage socket, the primary rays and the secondary rays firstly pass through the reflection shielding effect of the shield cover body, the ray quantity bombarded on the insulating part is greatly reduced, thereby prolonging the service life of the utility model and greatly increasing the stability, and the cover body is arranged, in the using process, after primary rays and secondary rays are shielded, most of the rays have better directivity after being emitted, and the aim of removing impurities is fulfilled;

2. the utility model relates to a shielding radome fairing for ray tube sets it to the spherical surface structure of outside bending, can improve the homogeneity of charged particle beam effectively, when the diameter of this sphere is 6 ~ 8 times of cover body diameter, the homogeneity of charged particle beam improves 20-50% than the flat structure;

3. the utility model relates to a shielding radome fairing for ray tube, the wall thickness of the cover body reduces to the position that thickness is minimum from both ends gradually, and the minimum position is axis length's 1/3 department, can form better shielding effect, and the setting of wall thickness like this can do benefit to the machine-shaping technology of the cover body moreover, and the yield is very high, and structure like this has an advantage in addition: under the same shielding parameter requirement, the material consumption is the least, and the lowest cost can be achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Reference numbers and corresponding part names in the drawings:

the novel high-voltage socket comprises a cover body 1, a connecting plate 2, a high-voltage socket 3 and a convex ring body 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail with reference to the following embodiments, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

As shown in figure 1, the utility model relates to a shielding fairing for a ray tube, which comprises a whole cylindrical hood body 1, wherein one end of the hood body 1 is sealed to form a connecting plate 2, the connecting plate 2 is bent towards the outer side of the hood body 1 to form a spherical structure, the diameter of the spherical surface is 6-8 times of that of the hood body 1, the opening of the other end forms a containing end, an interface for installing a high-voltage socket 3 is arranged on the connecting plate 2, the opening end of the hood body 1 is turned outwards to form a convex ring body 4, the hood body 1 is about 80-160mm, the height is 1-50mm, the top of the insulating part of the high-voltage socket can be covered, the thickness is about 1-5mm, the position on the axis of the hood body 1, which is apart from the connecting plate 2 and has the whole length of 1/3, is the position with the smallest wall thickness of the hood body 1, the surface roughness of the outer side of the cover body 1 is Ra0.05, and the surface roughness of the inner side of the cover body 1 is Ra0.4; the utility model discloses a shielding radome fairing adopts the material to be single or composite construction's metal material, like single material such as copper, molybdenum, tungsten, aluminium, stainless steel, perhaps adopts sandwich structure such as aluminium-plumbous-aluminium, copper-plumbous-copper, molybdenum-plumbous-molybdenum, tungsten-plumbous-tungsten, guarantees to have fine absorption effect to electron, photon and ion etc. and the secondary particle that produces simultaneously is less to have good electric vacuum performance.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. A shield fairing for a tube, comprising: the high-voltage socket comprises a cylindrical cover body (1), wherein one end of the cover body (1) is closed to form a connecting plate (2), the other end of the cover body is opened to form an accommodating end, and an interface used for installing a high-voltage socket (3) is arranged on the connecting plate (2).

2. A shield fairing for a tube as recited in claim 1, wherein: the connecting plate (2) is bent towards the outer side of the cover body (1) to form a spherical surface structure, and the diameter of the spherical surface is 6-8 times of that of the cover body (1).

3. A shield fairing for a tube as recited in claim 1, wherein: the opening end of the cover body (1) is turned outwards to form a convex ring body (4).

4. A shield fairing for a tube as recited in claim 1, wherein: the position on the axis of the cover body (1) which is away from the connecting plate (2) by the whole length 1/3 is the position where the wall thickness of the cover body (1) is minimum, and the wall thickness of the cover body (1) is gradually reduced from two ends to the position where the thickness is minimum.

5. A shield fairing for a tube as recited in claim 1, wherein: the surface roughness of the outer side of the cover body (1) is Ra0.1, and the surface roughness of the inner side of the cover body (1) is Ra0.4.

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