CN214485190U

CN214485190U - Multi-focus X-ray generator, X-ray irradiator and X-ray irradiation system

Info

Publication number: CN214485190U
Application number: CN202022233230.6U
Authority: CN
Inventors: 黄文会; 靳清秀; 谭承君; 唐传祥; 陈怀璧
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-10-26
Anticipated expiration: 2030-10-09

Abstract

The utility model relates to a biological equipment technical field especially relates to multifocal X ray generator, X ray irradiation appearance and X ray irradiation system, multifocal X ray generator include the casing and lie in inside positive pole target and two sets of cathode emission subassemblies of casing, and every cathode emission subassembly of group all includes a plurality of cathode electron guns, and two sets of cathode emission subassemblies are symmetrical respectively and set up in the both sides of positive pole target, and every cathode electron gun all just to positive pole target, and the casing is equipped with the play beam hole that is used for launching electron beam. The utility model has the advantages of utilize a plurality of X ray sources to carry out the stack of dose field, obtain even dose field, guarantee the even irradiation of irradiation article, solved the inhomogeneous difficult problem of irradiation under the single X ray source, but also broken through the restricted difficult problem of irradiation article lateral area, greatly increased the irradiation field of vision, can once handle more irradiation articles, improved irradiation efficiency, its cost also greatly reduced with the blood irradiation appearance that adopts a plurality of light source X-ray tubes.

Description

Multi-focus X-ray generator, X-ray irradiator and X-ray irradiation system

Technical Field

The utility model relates to a biological equipment technical field especially relates to multifocal X ray generator, X ray irradiator and X ray irradiation system.

Background

TA-GVHD (transfusion-associated graft versus host disease) is one of the most serious complications in transfusion in medicine. TA-GVHD is mainly due to the fact that after a person with immune function deficiency receives blood transfusion, the imported donor immunocompetent lymphocytes (mainly T lymphocytes) are not recognized and rejected by the immune system of a recipient, and are transplanted and proliferated in the recipient to attack and destroy tissues, organs and hematopoietic systems in the recipient. Irradiation of blood products prior to transfusion is effective in preventing TA-GVHD. After the blood product is irradiated by proper amount of ray (mainly gamma ray and X ray), the lymphocyte with immunological activity in blood can be effectively deactivated, and the function of erythrocyte and platelet and the activity of blood coagulation factor are not greatly affected.

Currently, blood irradiators can be classified into two types according to the radiation source, one type irradiating blood products with gamma rays generated by radiation sources (Cs-137 and Co-60), and the other type irradiating blood or blood products with X rays generated by an X-ray tube.

The blood irradiator adopting the radioactive source to generate gamma rays has the risk of radioactive source leakage, needs high-level shielding, and has complicated procedures of environmental evaluation, transportation approval and daily maintenance and management of radioactive source equipment. Compared with a radioactive source, the X-ray device has the advantages that the number of required shielding materials is greatly reduced, the equipment is small and portable, the problem of radioactive source treatment does not exist, but the X-ray energy generated by the X-ray device is low, so that X photons are easily absorbed by a large amount of superficial blood in the irradiation process, and the number of deep X photons is rapidly reduced.

The X-ray tube is a commonly used device of the blood irradiator adopting the X-ray device, but the X-ray tube as the most common X-ray source has some defects in use, such as small irradiation field and uneven irradiation of the single-source X-ray blood irradiator, so that the requirement on the uniformity of the dose in the irradiation standard cannot be met, and the blood product treated at one time is few. At present, measures such as adding a filter or extending the irradiation distance are generally adopted to obtain a relatively uniform dose field, so that although the above-mentioned partial disadvantages are overcome, the dose is further reduced, and the utilization efficiency of the X-ray tube is too low.

Aiming at the defects of a single-source X-ray tube in irradiation, a double-light-source irradiation scheme is provided, and X-ray sources are respectively arranged in the upper direction, the lower direction or the left direction and the right direction of a blood product, so that the uniformity of irradiation in the depth direction is improved. Although the dual X-ray source solves the problem of uniformity of irradiation in the depth direction, the X-ray tube emits spherical waves, so that the uniformity of a blood product in the transverse direction is limited, the larger the transverse area is, the worse the uniformity is, the larger the transverse area of the blood product is, the larger the difference between the doses of the center and the edge of the blood product is, and the working efficiency of the blood irradiation instrument is limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a multifocal X-ray generator utilizes a plurality of X-ray sources to carry out the stack in dose field, obtains even dose field, guarantees the even irradiation of irradiation article, has solved the inhomogeneous difficult problem of irradiation under the single X-ray source, and has still broken through the restricted difficult problem of irradiation article lateral area, greatly increased the irradiation field of vision, can once handle more irradiation articles, improved irradiation efficiency, its cost is compared also greatly reduced with the blood irradiator that adopts a plurality of light source X-ray tubes. The problem of dose reduction caused by the fact that a single X-ray tube adopts a filter or the irradiation distance is increased is solved, and compared with a blood irradiator with double X-ray tubes, the blood irradiator has a larger irradiation field, the utilization efficiency of the X-ray tube is effectively improved, and the blood irradiator has more advantages in cost.

The utility model discloses still provide an X ray irradiation appearance.

The utility model discloses still provide an X ray irradiation system.

According to the utility model discloses multifocal X ray generator of first aspect embodiment, include the casing and be located inside positive pole target and two sets of cathode emission subassembly of casing, every cathode emission subassembly of group all includes a plurality of negative pole electron guns, and is two sets of the cathode emission subassembly symmetry respectively set up in the both sides of positive pole target, and every the cathode electron gun is all just right the positive pole target, the casing is equipped with and is used for the transmission the hole of restrainting of play of electron beam.

According to the utility model discloses an embodiment, still including being used for gathering together the focus pole of electron beam, the focus pole with cathode electron gun one-to-one sets up, and is located cathode electron gun with between the positive pole target.

According to an embodiment of the utility model, still include the messenger the inside of casing is the vacuum subassembly of vacuum state, vacuum subassembly includes ion pump and feed-through, the ion pump with the casing intercommunication, feed-through set up in the inside of casing and with the casing is connected.

According to an embodiment of the present invention, the feed-through comprises a base and a needle body, one side of the base is connected to the inner wall of the housing, and the other side is connected to the needle body.

According to the utility model discloses X ray irradiator of second aspect embodiment, including shielding storehouse and being located shielding storehouse inside holding subassembly and as above the multifocal X ray generator, the holding subassembly is used for placing the irradiation article container, the holding subassembly corresponds the setting of beam outlet hole of multifocal X ray generator.

According to the utility model discloses an embodiment, the holding subassembly includes tray, pivot and motor, the tray level sets up, the motor passes through the pivot with the tray is connected, in order to drive the tray level rotates, the outside cladding motor shielding shell of motor.

According to the utility model discloses an embodiment, it supplies the line hole of crossing that the cable worn out still to be equipped with on the shielding storehouse, the shielding storehouse is in the outside of crossing the line hole sets up cable shielding shell.

According to the utility model discloses X ray irradiation system of third aspect embodiment, including high voltage generator, light source control box, cooling unit and as above X ray irradiator, high voltage generator with the positive pole target of multifocal X ray generator is connected, the cooling unit with the cooling line of multifocal X ray generator is connected, the light source control box with the negative pole electron gun of multifocal X ray generator is connected.

According to the utility model discloses an embodiment still includes the shell, the shell includes frame and gyro wheel, be equipped with the multilayer backup pad on the frame, the bottom of frame is equipped with the gyro wheel, high voltage generator the light source control box the cooling unit with X ray irradiator all set up in the backup pad.

According to the utility model discloses an embodiment, still be equipped with push-and-pull door, display screen and button on the shell.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, at least, have following technological effect: the utility model discloses multifocal X ray generator, the positive pole target is carried the inside production high tension electric field at the casing, the both sides of positive pole target correspond installation cathode emission subassembly, a plurality of cathode electron guns on two cathode emission subassemblies set up at the bilateral symmetry of positive pole target, the electron beam that the cathode electron gun thermal emission produced bombards on the positive pole target under high tension electric field's effect, thereby obtain multifocal X ray source, the irradiation field that multifocal X ray source produced superposes each other, obtain a relatively even, the enough big dosage region of area, project on the irradiation article through the play beam hole on the casing.

The utility model discloses utilize a plurality of X ray sources to carry out the stack in dose field, obtain even dose field, guarantee the even irradiation of irradiation article, solved the inhomogeneous difficult problem of irradiation under the single X ray source, but also broken through the restricted difficult problem of irradiation article lateral area, greatly increased the irradiation field of vision, can once handle more irradiation articles, improved irradiation efficiency, its cost is compared also greatly reduced with the blood irradiation appearance that adopts a plurality of light source X-ray tubes. The problem of dose reduction caused by the fact that a single X-ray tube adopts a filter or the irradiation distance is increased is solved, and compared with a blood irradiator with double X-ray tubes, the blood irradiator has a larger irradiation field, the utilization efficiency of the X-ray tube is effectively improved, and the blood irradiator has more advantages in cost.

In addition to the technical problems addressed by the present invention, the technical features of the constituent technical solutions, and the advantages brought by the technical features of these technical solutions, which have been described above, other technical features of the present invention and the advantages brought by these technical features will be further described with reference to the accompanying drawings, or can be learned by practice of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a multi-focus X-ray generator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an X-ray irradiator according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a shielding bin of an X-ray irradiator according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an X-ray irradiation system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a housing of an X-ray irradiation system according to an embodiment of the present invention;

fig. 6 is a schematic control diagram of an X-ray irradiation system according to an embodiment of the present invention.

Reference numerals:

1: a housing; 11: a beam outlet hole;

2: an anode target; 3: a cathode electron gun; 4: a focusing electrode;

5: a vacuum assembly; 51: an ion pump; 52: a base; 53: a needle body;

01: a shielding bin; 011: a motor shield case; 012: a cable shield shell; 013: a protective door; 014: a rear cover;

02: an accommodating component; 021: a tray; 022: a rotating shaft; 023: a motor;

03: a multifocal X-ray generator; 04: an irradiation article container;

001: a high voltage generator; 002: a light source control box; 003: a cooling unit; 004: an X-ray irradiator;

005: a housing; 0051: a frame; 0052: a roller; 0053: a support plate; 0054: a sliding door; 0055: a display screen; 0056: a button; 0057: a guide rail;

006: a distribution box; 007: an ion pump power supply; 008: and an industrial personal computer.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1, the embodiment of the utility model provides a multifocal X-ray generator, including casing 1 and the inside positive pole target 2 and two sets of cathode emission subassembly that are located casing 1, every cathode emission subassembly of group all includes a plurality of negative pole electron guns 3, and two sets of cathode emission subassemblies symmetry respectively set up in the both sides of positive pole target 2, and every negative pole electron gun 3 all just to positive pole target 2, and casing 1 is equipped with the hole 11 that restraints that is used for launching the electron beam.

The utility model discloses multifocal X ray generator, positive pole target 2 produces high tension electric field in casing 1's inside, positive pole target 2's both sides correspond installation negative pole emission subassembly, a plurality of negative pole electron guns 3 on two negative pole emission subassemblies set up at the bilateral symmetry of positive pole target 2, the electron beam that 3 thermal emissions of negative pole electron gun produced bombards on positive pole target 2 under high tension electric field's effect, thereby obtain multifocal X ray source, the irradiation field that multifocal X ray source produced superposes each other, obtain a relatively even, the enough big dosage region of area, project on the irradiation article through play beam hole 11 on casing 1.

The utility model discloses carry out the X ray irradiation to blood products for prevent TA-GVHD (blood transfusion associated graft versus host disease), simultaneously, multifocal X ray generator not only is applied to the irradiation treatment of blood products, also can be applied to biological irradiation field, for example irradiate cell or toy, thereby can be used to stem cell DNA damage, cell culture, tumour, radiobiological research.

According to the utility model discloses an embodiment, the utility model discloses multifocal X-ray generator still includes the focus 4 that is used for gathering together the electron beam, and focus 4 sets up with cathode electron gun 3 one-to-one, and is located between cathode electron gun 3 and the positive pole target 2. Each cathode electron gun 3 is provided with a focusing electrode 4 in front of the position close to the anode target 2, the cathode electron gun 3 thermally emits electrons to hit the anode target 2 to generate X rays in a heating state, and the control of electron beams can be realized through the focusing electrode 4.

According to the utility model discloses an embodiment, the utility model discloses multifocal X-ray generator still includes the vacuum module 5 that makes the inside of casing 1 be vacuum state, and vacuum module 5 includes ion pump 51 and feed-through, and ion pump 51 communicates with casing 1, and feed-through sets up in casing 1's inside and is connected with casing 1. In this embodiment, the inside of the casing 1 is a vacuum chamber, the ion pump 51 of the vacuum module 5 forms a vacuum environment inside the casing 1, the feed-throughs enable the electron beam to transmit under the vacuum environment, the two feed-throughs are respectively disposed at two sides of the anode target 2 and correspond to the cathode emission module, and the two ion pumps 51 are disposed at the bottom of the casing 1 and communicate with the casing 1.

According to an embodiment of the present invention, the feed-through comprises a base 52 and a needle 53, one side of the base 52 is connected to the inner wall of the housing 1, and the other side of the base 52 is connected to the needle 53. In this embodiment, the base 52 is a ceramic base, the needle body 53 is a feeder thoru (feed through) needle, and the ceramic base serves as a mounting base to fix the needle body 53 inside the housing 1. A plurality of needle bodies 53 are arranged on one base 52, and the needle bodies 53 on both sides of the anode target 2 are symmetrically arranged.

As shown in fig. 1, fig. 2 and fig. 3, the embodiment of the present invention provides an X-ray irradiator, which includes a shielding bin 01, a containing component 02 located inside the shielding bin 01, and a multi-focus X-ray generator 03 as in the above embodiment, wherein the containing component 02 is used for placing an irradiation product container 04, and the containing component 02 is arranged corresponding to a beam outlet 11 of the multi-focus X-ray generator 03.

The utility model discloses X-ray irradiator, irradiation article container 04 are placed on holding subassembly 02, and one side of holding subassembly 02 is multifocal X ray generator 03, and irradiation article container 04 just is restrainting hole 11 to the play of multifocal X ray generator 03. The utility model discloses utilize multifocal X ray generator 03 to make a plurality of X ray sources carry out the superimposed characteristics in dosage field, obtain even dosage field, guarantee the even irradiation of irradiation article, greatly increased the irradiation field of vision, can once handle more irradiation articles, improved irradiation efficiency.

In this embodiment, shielding storehouse 01 is the plumbous shield body, mainly shields X ray, is provided with open-type protection door 013 on shielding storehouse 01, and protection door 013 corresponds the position setting of holding subassembly 02, can put into or take out shielding storehouse 01 with irradiation article container 04 after opening, and is provided with lock and entrance guard sensor on protection door 013, can form a confined shielding space after protection door 013 closes, can guarantee irradiation process's safe operation, the X ray leakage can not appear. The shielding bin 01 is also provided with a rear cover 014, the rear cover 014 is a whole openable bin surface, the occupied area of the shielding bin is larger than that of the protective door 013, the side surface of the shielding bin 014 is arranged corresponding to the multifocal X-ray generator 03, instrument parts in the shielding bin 01 can be taken out after the shielding bin 014 is opened, and overhauling and installation are facilitated.

According to the utility model discloses an embodiment, holding subassembly 02 includes tray 021, pivot 022 and motor 023, and tray 021 level sets up, and motor 023 is connected with tray 021 through pivot 022 to drive tray 021 level rotation, the outside cladding motor shielding case 011 of motor 023. In this embodiment, hold the irradiation article in the irradiation article container 04, irradiation article container 04 prevents on tray 021, tray 021 level sets up, the central point of its lower surface puts the vertical fixation and has pivot 022, the bottom and the drive gear of pivot 022 are connected, drive gear is connected with motor 023, it is rotatory to drive tray 021 under the drive of motor 023, thereby make irradiation article container 04 rotatory, can make irradiation article container 04 rotatory 360 accepting the irradiation of X ray in irradiation process, the uniformity of irradiation dose has been guaranteed, the utilization ratio of ray has also been improved. Meanwhile, the rotating speed of the irradiation product container 04 is adjusted by controlling the motor 023, so that the irradiation dose is more uniform. The motor shielding shell 011 also belongs to a lead shielding body, so that the safe operation of the irradiation process is ensured, and the problem of X-ray leakage is avoided.

According to the utility model discloses an embodiment still is equipped with the line hole of crossing that supplies the cable to wear out on the shielding storehouse 01, and the outside of shielding storehouse 01 crossing the line hole sets up cable shielding shell 012. In this embodiment, the bottom in shielding storehouse 01 sets up the line hole, and the outside sets up cable shielding shell 012 as the passageway that is used for the cable to connect specially, conveniently shields instrument in the storehouse 01 and outside instrument and walks line connection, can guarantee not to leak the dose during operation. The cable shielding shell 012 also belongs to a lead shielding body, so that the safe operation of the irradiation process is ensured, and the problem of X-ray leakage is avoided.

As shown in fig. 4, 5 and 6, the embodiment of the present invention provides an X-ray irradiation system, which includes a high voltage generator 001, a light source control box 002, a cooling unit 003 and an X-ray irradiator 004 according to the above embodiment, wherein the high voltage generator 001 is connected to an anode target 2 of a multi-focus X-ray generator 03, the cooling unit 003 is connected to a cooling pipeline of the multi-focus X-ray generator 03, and the light source control box 002 is connected to a cathode electron gun 3 of the multi-focus X-ray generator 03.

The utility model discloses X ray irradiation system, high voltage generator 001 provide required high pressure for positive pole target 2 to at the inside high voltage electric field that produces of casing 1 of multifocal X ray generator 03. The light source control box 002 heats the cathode electron gun 3, the electron beam generated by the thermal emission of the cathode electron gun 3 bombards the anode target 2 under the action of the high-voltage electric field to generate X-ray to irradiate the irradiated product in the shielding bin 01, and in addition, the light source control box 002 also controls the generation and stop of the X-ray of the cathode electron gun 3 and the beam size of the electron beam, thereby controlling the related irradiation process. The electron beam bombards the anode target 2 and generates a large amount of heat besides X rays, so that the temperature of the anode target 2 is rapidly increased, and the cooling unit 003 cools the multi-focus X ray generator 03 to ensure the normal working temperature of the system.

In this embodiment, the high voltage generator 001 is connected to the anode target 2 through a high voltage cable, the cooling unit 003 is connected to the cooling line of the multi-focus X-ray generator 03 through a cooling line, and the light source control box 002 is connected to the cathode electron gun 3 mainly through a specific control cable. Wherein, high voltage generator 001 is a positive high voltage generator, and can generate 200KV high voltage at most.

According to the utility model discloses an embodiment, the utility model discloses X-ray irradiation system still includes shell 005, and shell 005 includes frame 0051 and gyro wheel 0052, is equipped with multilayer backup pad 0053 on frame 0051, and frame 0051's bottom is equipped with gyro wheel 0052, and high-pressure generator 001, light source control box 002, cooling unit 003 and X-ray irradiator 004 all set up on backup pad 0053. In this embodiment, the casing 005 is a rectangular box body, the inside of the casing is supported by a frame 0051, a support plate 0053 is provided on the frame 0051 to divide the inside of the casing 005 into a plurality of spaces, and rollers 0052 are provided at four corners of the bottom of the casing 005. In this embodiment, two support plates 0053 are used for placing the upper space and the lower space inside the housing 005, the upper space is used for placing the distribution box 006, the X-ray irradiator 004, and the ion pump power source 007, the lower space is divided into a left space and a right space, the left space is used for placing the light source control box 002 and the high voltage generator 001, and the right space is used for placing the cooling unit 003.

In this embodiment, the ion pump power source 007 is disposed at the top of the X-ray irradiator 004, the ion pump power source 007 supplies power to the ion pump 51 of the multi-focus X-ray generator 03, and the distribution box 006 supplies power to the high-voltage generator 001, the light source control box 002, the cooling unit 003, the ion pump 51, and the like.

According to an embodiment of the present invention, a sliding door 0054, a display screen 0055 and a button 0056 are further disposed on the housing 005. In this embodiment, a display screen 0055 and a rail-type sliding door 0054 are disposed on a side wall of the housing 005, and an operation button 0056 is disposed near the display screen 0055, the display screen 0055 and the button 0056 are used for displaying information related to an irradiation process and controlling the irradiation process, and the sliding door 0054 is provided with a guide rail 0057, so as to facilitate opening and closing of the door. The sliding door 0054 is opposite to the protective door 013 of the X-ray irradiator 004, and after the sliding door 0054 is opened, the protective door 013 can be directly opened, so that the irradiation article container 04 can be put into or taken out of the shielding bin 01.

In this embodiment, an industrial personal computer 008 is provided on the back surface of the display screen 0055, and the industrial personal computer 008 is connected to the display screen 0055 through a line, and the X-ray irradiator 004 is controlled by sequentially operating the display screen 0055. High voltage generator 001, cooling unit 003, ion pump 51 power, light source control box 002, the motor 023 and the block terminal 006 of holding subassembly 02 all are connected with industrial computer 008 through the circuit, and operating personnel directly operates on display screen 0055, controls whole X ray irradiation system's work flow through industrial computer 008 of being connected with display screen 0055.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A multifocal X-ray generator characterized by: including the casing with be located inside positive pole target and two sets of cathode emission subassembly of casing, every cathode emission subassembly of group all includes a plurality of negative pole electron guns, and is two sets of the cathode emission subassembly symmetry respectively set up in the both sides of positive pole target, and every the cathode electron gun all just right the positive pole target, the casing is equipped with the hole of restrainting that is used for launching electron beam.

2. The multifocal X-ray generator of claim 1 wherein: the focusing electrode is used for gathering the electron beams, and the focusing electrode and the cathode electron gun are arranged in a one-to-one correspondence mode and are located between the cathode electron gun and the anode target.

3. The multifocal X-ray generator of claim 1 or 2, characterized in that: still include the messenger the inside of casing is vacuum state's vacuum subassembly, vacuum subassembly includes ion pump and feed-through, the ion pump with the casing intercommunication, feed-through set up in the inside of casing and with the casing is connected.

4. The multifocal X-ray generator of claim 3 wherein: the feed-through piece comprises a base and a needle body, wherein one side of the base is connected with the inner wall of the shell, and the other side of the base is connected with the needle body.

5. An X-ray irradiator characterized in that: the multi-focus X-ray generator comprises a shielding bin, a containing component and the multi-focus X-ray generator, wherein the containing component is located inside the shielding bin, the containing component is used for placing an irradiation product container, and the containing component is arranged corresponding to a beam outlet hole of the multi-focus X-ray generator.

6. The X-ray irradiator according to claim 5, characterized in that: the holding assembly comprises a tray, a rotating shaft and a motor, the tray is horizontally arranged, the motor is connected with the tray through the rotating shaft to drive the tray to horizontally rotate, and the motor shielding shell is coated outside the motor.

7. The X-ray irradiator according to claim 5, characterized in that: the shielding bin is further provided with a wire passing hole for the cable to penetrate out, and a cable shielding shell is arranged outside the wire passing hole.

8. An X-ray irradiation system characterized by: the X-ray irradiator comprises a high voltage generator, a light source control box, a cooling unit and the X-ray irradiator as claimed in any one of claims 5 to 7, wherein the high voltage generator is connected with an anode target of the multi-focus X-ray generator, the cooling unit is connected with a cooling pipeline of the multi-focus X-ray generator, and the light source control box is connected with a cathode electron gun of the multi-focus X-ray generator.

9. The X-ray irradiation system according to claim 8, characterized in that: the high-voltage generator, the light source control box, the cooling unit and the X-ray irradiator are all arranged on the supporting plate.

10. The X-ray irradiation system according to claim 9, characterized in that: the shell is also provided with a sliding door, a display screen and a button.