X-ray generator and detection device

Abstract

The invention provides an X-ray generator and detection equipment. The X-ray generator comprises a voltage doubling rectifying circuit, at least one X-ray tube and a ray shielding structure. The voltage doubling rectifying circuit comprises a plurality of output ends. The anode of the X-ray tube is electrically connected with the first output end of the plurality of output ends, the cathode of the X-ray tube is electrically connected with the second output end of the plurality of output ends, and the output voltage of the first output end is higher than the output voltage of the second output end. The ray shielding structure comprises a packaging body, a penetrating ray emitting hole is formed in the packaging body, the voltage doubling rectifying circuit and the X-ray tube are arranged in the packaging body, and the packaging body has insulating performance and ray shielding performance.

Description

Technical Field

[0001] The present disclosure relates to the technical field of X-ray generating devices, and in particular to an X-ray generator and a detection device. Background Art

[0002] X-rays are widely used in industrial non-destructive testing, safety inspections, medical diagnosis and treatment, and other fields. In particular, X-ray fluoroscopic imaging equipment (such as CT (computed tomography)) made using the high penetrating power of X-rays plays an important role in all aspects of people's daily lives. Among them, the X-ray generator is an indispensable part of the X-ray fluoroscopic imaging equipment. An X-ray generator refers to a device that can generate X-rays, among which the X-ray tube (also called the bulb tube) and the voltage doubler rectifier circuit are important components of the X-ray generator. The X-ray tube is used to generate X-rays, and the voltage doubler rectifier circuit is used to provide the X-ray tube with the high voltage required to generate X-rays.

[0003] The X-ray tube and the voltage doubler rectifier circuit are usually designed as two independent components in an insulated split design, and work together through electrical connections. Among them, the voltage doubler rectifier circuit adopts insulating materials to design the corresponding structure. The X-ray tube adopts a combination of insulating materials and radiation shielding materials to design the corresponding structure to ensure insulation performance while meeting radiation shielding requirements. Then, the positive and negative electrodes of the X-ray tube and the output end of the voltage doubler rectifier circuit are connected correspondingly through electrical connecting wires.

[0004] In the process of realizing the concept of the present invention, the inventors found that this insulation separation design of the X-ray tube and the voltage doubler rectifier circuit has the following defects: on the one hand, the voltage doubler rectifier circuit and the X-ray tube insulation are designed separately, which increases the number of materials and costs, and reduces the internal space utilization of the X-ray generator; on the other hand, the voltage level of the connecting wire required for the electrical connection between the X-ray tube and the voltage doubler rectifier circuit is relatively high (for example, ±80kV), so the connecting wire must be additionally insulated and protected, and because the connecting wire needs to pass through the insulating material and radiation shielding material of the X-ray tube, local discharge and radiation leakage problems are likely to occur.

[0005] The above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art. Summary of the invention

[0006] In view of this, the present disclosure provides an X-ray generator that integrates an X-ray tube and a voltage doubler rectifier circuit.

[0007] According to one aspect of the embodiments of the present disclosure, an X-ray generator is provided, which includes a voltage doubler rectifier circuit, at least one X-ray tube, and a ray shielding structure.

[0008] The voltage doubler rectifier circuit includes a plurality of output terminals.

[0009] The X-ray tube comprises an anode and a cathode, wherein the anode of the X-ray tube is electrically connected to a first output terminal among a plurality of output terminals, and the cathode of the X-ray tube is electrically connected to a second output terminal among the plurality of output terminals, wherein an output voltage of the first output terminal is higher than an output voltage of the second output terminal.

[0010] The ray shielding structure comprises a packaging body, on which a ray exit hole is provided, wherein the voltage doubler rectifier circuit and the X-ray tube are arranged inside the packaging body; wherein the packaging body has insulation performance and ray shielding performance.

[0011] According to some embodiments of the present disclosure, the voltage doubler rectifier circuit further includes a circuit board; wherein the X-ray tube is disposed on the circuit board.

[0012] According to some embodiments of the present disclosure, a first direction pointing from the anode to the cathode of the X-ray tube and a second direction pointing from the first output end to the second output end satisfy a parallel condition and have the same direction, wherein the parallel condition includes that the first direction and the second direction are parallel, or that the angle between the first direction and the second direction is less than a predetermined first angle threshold.

[0013] According to some embodiments of the present disclosure, a first midpoint of the X-ray tube in the first direction and a second midpoint of the voltage doubler rectifier circuit in the second direction satisfy an alignment condition, wherein the alignment condition includes that a midpoint line formed by connecting the first midpoint and the second midpoint is perpendicular to one of the first direction and the second direction, or that the angles formed by the midpoint line and the first direction and the second direction, respectively, deviate from 90° by less than a second angle threshold.

[0014] According to some embodiments of the present disclosure, the ray shielding structure also includes a first lead and a second lead, wherein the first lead and the second lead are arranged on the package body; wherein one end of the first lead extends to the outside of the package body, and the other end is electrically connected to the input end of the voltage doubler rectifier circuit; one end of the second lead extends to the outside of the package body, and the other end is electrically connected to the cathode of the X-ray tube.

[0015] According to some embodiments of the present disclosure, the first lead and the second lead are integrally cast with the package body.

[0016] According to some embodiments of the present disclosure, the X-ray generator also includes a metal casing and a heat dissipation system.

[0017] The radiation shielding structure is wrapped by a metal shell, wherein a first transformer oil is filled between the metal shell and the packaging body of the radiation shielding structure.

[0018] The heat dissipation system includes a cooling system and a heat exchange pipeline. The cooling system is arranged outside the metal shell; a part of the heat exchange pipeline passes through the metal shell and contacts the first transformer oil, and at least another part is located in the cooling system.

[0019] According to some embodiments of the present disclosure, the X-ray generator also includes a filament transformer, wherein the filament transformer is electrically connected to one end of the second lead extending to the outside of the package body, wherein the filament transformer is arranged between the metal shell and the package body, and the external lead of the filament transformer extends outward through the package body.

[0020] According to some embodiments of the present disclosure, the X-ray generator also includes a high-voltage power supply transformer, wherein the high-voltage power supply transformer is electrically connected to one end of the first lead extending to the outside of the package body; wherein the high-voltage power supply transformer is arranged between the metal shell and the package body, and the external lead of the high-voltage power supply transformer extends outward through the package body.

[0021] According to some embodiments of the present disclosure, the interior of the packaging body is filled with a second transformer oil.

[0022] According to some embodiments of the present disclosure, the packaging body is made of lead yellow material.

[0023] Another aspect of the embodiments of the present disclosure provides a detection device, which includes the above-mentioned X-ray generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0025] Figure 1A The structure diagram of the detection device according to the embodiment of the present disclosure is schematically shown;

[0026] Figure 1B Schematically shows Figure 1A A side view of the detection device shown;

[0027] Figure 2A A schematic diagram schematically shows a power supply mode of an X-ray tube according to an embodiment of the present disclosure, which schematically shows a single power supply mode;

[0028] Figure 2BA schematic diagram schematically shows a power supply method of an X-ray tube according to an embodiment of the present disclosure, which schematically shows a dual power supply method;

[0029] Figure 3 The structure of an X-ray generator according to an embodiment of the present disclosure is schematically shown;

[0030] Figure 4 The structure of an X-ray generator according to another embodiment of the present disclosure is schematically shown.

[0031] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of the overall / local structures or the overall / local areas may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not have to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known structures, materials or methods are not specifically described.

[0033] Throughout the specification, references to "some exemplary embodiments," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least some exemplary embodiments of the present invention. Therefore, the phrases "in some exemplary embodiments," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any appropriate combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0035] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0036] The terms "upper", "lower", "left" and "right" used in this specification are not intended to limit the absolute position of components, but to describe the relative position of components in the view to aid understanding; the "top side" and "bottom side" in this specification are relative to the upper and lower sides of an object standing upright in general; "first", "second" and the like are not for sorting, but to distinguish different components.

[0037] Figure 1A The structure diagram of the detection device according to the embodiment of the present disclosure is schematically shown. Figure 1B Schematically shows Figure 1A A side view of the detection device shown.

[0038] Combined with reference Figure 1A and Figure 1B According to an exemplary embodiment of the present disclosure, a detection device 10 includes: a conveying device 17 for conveying an inspected object in a conveying direction V; a slip ring 12 capable of rotating around a rotation axis, and the rotation axis can be substantially parallel to the conveying direction V; a radiation source 11 connected to the slip ring 12; a detection device 16 opposite to the radiation source 11 and connected to the slip ring 12, and the detection device 16 and the radiation source 11 can rotate together with the slip ring 12; a control device 18 for controlling the operation of the detection device 10; and a data processing device 15 for processing data detected by the detection device 16.

[0039] In the embodiment of the present disclosure, the ray source 11 can emit X-rays, that is, the ray source 11 can be an X-ray generator.

[0040] According to an embodiment of the present disclosure, an X-ray generator may include an X-ray tube, a voltage-doubling rectifier circuit, and a radiation shielding structure, wherein the X-ray tube and the voltage-doubling rectifier circuit are integrally packaged inside the radiation shielding structure, and the radiation shielding structure has insulation performance and radiation shielding performance.

[0041] Specifically, the X-ray tube can generate X-rays, and the voltage-doubling rectifier circuit can provide the X-ray tube with the high voltage required between the anode and cathode of the X-ray tube. For example, the anode and cathode of the X-ray tube can be electrically connected to the high and low voltage output ends of the voltage-doubling rectifier circuit through the anode wire and the cathode wire, and then the X-ray tube and the voltage-doubling rectifier circuit are packaged together in a package body of a ray shielding structure, wherein a ray exit hole is provided on the package body, so that the X-rays generated by the X-ray tube can be emitted through the ray exit hole.

[0042] In some embodiments, the X-ray generator may include only one X-ray tube. In other embodiments, the X-ray generator may also include multiple X-ray tubes, so that a voltage doubler rectifier circuit can be used to provide the multiple X-ray tubes with high voltages required for their respective operations, and the multiple X-ray tubes and the voltage doubler rectifier circuit are both packaged inside the radiation shielding structure.

[0043] Compared with the structure in the prior art that requires the X-ray tube and the voltage-doubling rectifier circuit to be separately packaged and then connected via connecting wires, the structure of the integrated design and packaging of the X-ray tube and the voltage-doubling rectifier circuit in the disclosed embodiment can, on the one hand, effectively reduce material costs, and the compact structure can reduce the size of the X-ray generator; on the other hand, since the connecting wires between the voltage-doubling rectifier circuit and the X-ray tube (i.e., the cathode wire and the anode wire) are packaged inside the radiation shielding structure, there is no need to additionally consider the insulation problem of the cathode wire and the anode wire, and correspondingly reduces the problem of local discharge or radiation leakage that may exist in the cathode wire and the anode wire.

[0044] It should be noted that Figure 1A and Figure 1B The detection device shown in the figure is a CT device for checking luggage or articles for illustration only. The detection device according to the embodiment of the present disclosure is not limited to a CT device for checking luggage or articles, but may also be a CT device for checking a human body, or other detection devices using an X-ray generator, such as other types of security inspection equipment, etc.

[0045] Figure 2A A schematic diagram schematically shows a power supply mode of the X-ray tube 20 according to an embodiment of the present disclosure, which schematically shows a single power supply mode; Figure 2B A schematic diagram schematically shows a power supply method of the X-ray tube 20 according to an embodiment of the present disclosure, which schematically shows a dual power supply method.

[0046] Combined with reference Figure 2A and Figure 2B The X-ray tube 20 may include a tube shell 21, and an anode 22 and a cathode 24 disposed in the tube shell 21. The interior of the tube shell 21 is a vacuum.

[0047] The main function of the cathode 24 is to emit an electron beam and focus the electron beam so that the electron beam bombarding the target surface has a certain size and shape. The cathode 24 may include a filament 241. For example, the filament 241 may be made of tungsten, because tungsten has certain electron emission capabilities at high temperatures, a high melting point, good ductility, is easy to draw, has good tensile strength, and is not easily deformed under a strong electric field. The filament 241 may be wound into a small solenoid shape. For example, the filament voltage may be AC ​​5 to 10 V / 50 Hz, and the filament current may be 2 to 9 A. After the filament 241 is powered on, the temperature gradually rises, and electrons begin to be emitted after reaching a certain temperature (about 2100 K).

[0048] The main function of the anode 22 is to block the high-speed electron flow to generate X-rays, and at the same time radiate or conduct away the heat generated during exposure. In addition, the anode 22 can also absorb secondary electrons and scattered rays. The anode 22 may include a target surface for electrons to strike.

[0049] The tube shell 21 can be a glass shell, which is used to fix and support the anode 22 and the cathode 24 and maintain the vacuum degree in the tube. The tube shell 21 can be made of molybdenum group hard glass with high melting point, high insulation strength and small expansion coefficient. Since the metal expansion coefficients of the molybdenum group glass shell and the cathode and anode are different, the two are not suitable for direct welding. Therefore, an alloy ring containing about 54% iron, about 29% nickel and about 17% cobalt can be inlaid on the copper body as an intermediate transition body, and then the glass shell is welded on the alloy ring, so that the expansion coefficients of the alloy ring and the hard glass are close to each other, so as to avoid cracks or fragments in the glass at the joint due to temperature changes. In order to prevent gas discharge in the tube shell 21 and ensure that the electrons emitted by the cathode 24 can fly to the anode 22 at high speed without obstruction, the vacuum degree in the tube shell 21 should be maintained below 133.3×10-7Pa. In addition, all parts installed in the tube shell 21 are strictly cleaned, degreased and thoroughly degassed. For example, high-frequency vacuum heating and exhaust can be used.

[0050] When a high voltage is applied between the anode 22 and the cathode 24 and a certain voltage is applied to both ends of the filament 241, a large number of free electrons are emitted from the cathode 24, which will collide with the target surface of the anode. After the energy carried by the high-speed electron beam is sharply blocked, part of it is lost in the form of heat energy, and the other effective part will produce X-rays.

[0051] The power supply of the X-ray tube 20 may include a high voltage power supply 31 and a filament power supply 32. The high voltage power supply 31 is used to apply a high voltage to the anode and cathode of the X-ray tube, and the filament power supply 32 is used to provide current to the filament 241. According to an embodiment of the present disclosure, the high voltage power supply 31 may be a voltage doubling rectifier circuit.

[0052] exist Figure 2AIn the embodiment shown, the high voltage power supply 31 and the filament power supply 32 can be closed-loop controlled by a set of control systems, and the control circuit is relatively simple.

[0053] exist Figure 2B In the embodiment shown, a dual power supply mode of positive and negative high voltage power supplies is adopted, which makes it easier to obtain high voltage. The output of the same high voltage is only half of that of a single power supply mode, and the device voltage resistance and power supply volume can be reduced.

[0054] According to the working principle of the X-ray tube 20, a sufficiently high voltage, that is, a sufficient electric field strength, is required between the anode 22 (corresponding to the target) and the cathode 24 (corresponding to the filament) to make the electrons of the filament hit the target in a high-energy and high-speed state. Therefore, the voltage provided by the high-voltage power supply 31 needs to be high enough. For example, the amplitude of the voltage provided by the high-voltage power supply 31 can be tens to hundreds of kilovolts (kV). The filament power supply 32 provides low-voltage power to the filament 241, and its voltage amplitude can be tens of volts (V) and the power is tens of watts (W). The negative pole of the filament power supply 32 is electrically connected to the negative pole of the high-voltage power supply 31, so that the filament 241 of the entire X-ray tube is at a negative high-voltage potential. A filament transformer can be added between the high-voltage power supply 31 and the filament power supply 32 to achieve isolation, wherein the filament transformer requires a higher isolation voltage level.

[0055] Figure 3 The structure of an X-ray generator 40 according to an embodiment of the present disclosure is schematically shown.

[0056] like Figure 3 As shown, the X-ray generator 40 includes a voltage doubler rectifier circuit 41 , an X-ray tube 20 and a ray shielding structure 42 .

[0057] The voltage doubler rectifier circuit 41 includes a first output terminal and a second output terminal, wherein the first output terminal is connected to the anode line 43, and the second output terminal is connected to the cathode line 44. The output voltage of the first output terminal is higher than the output voltage of the second output terminal.

[0058] The X-ray tube 20 includes an anode 22 and a cathode 24 (for details, see Figure 2A and Figure 2B ), wherein the anode 22 of the X-ray tube is connected to the anode line 43, and the cathode 24 of the X-ray tube is connected to the cathode line 44. Thus, the electrical connection between the X-ray tube 20 and the voltage doubler rectifier circuit 41 is realized through the cathode line 44 and the anode line 43.

[0059] The radiation shielding structure 42 includes a packaging body 421 , and a radiation exit hole 422 may be provided on the packaging body 421 . The voltage doubler rectifier circuit 41 and the X-ray tube 20 are provided inside the packaging body 421 .

[0060] The package body 421 has both insulation and radiation shielding properties, for example, it can be made of a material having both insulation and radiation shielding properties (such as lead yellow material, i.e., lead oxide). The package body 421 can be in a shell shape or a frame structure, wherein the package body 421 can be integrally cast.

[0061] The main function of the voltage doubler rectifier circuit 41 is to convert the input alternating current (AC) voltage into a direct current (DC) voltage, and the output voltage is a multiple of the effective value of the input voltage. The working principle of the voltage doubler rectifier circuit 41 is based on the charging and discharging process of the capacitor. In each cycle of the AC voltage, the capacitor is charged to the peak voltage, and then the capacitor is controlled by the diode to transfer its stored charge to another capacitor, thereby realizing voltage doubling. Through multiple such charging and transfer steps, a higher voltage output can be achieved. Among them, the high voltage output by the voltage doubler rectifier circuit 41 is transmitted to the anode 22 and cathode 24 of the X-ray tube 20 through the anode line 43 and the cathode line 44, thereby providing a sufficiently high voltage between the anode 22 and the cathode 24 of the X-ray tube 20, that is, a sufficient electric field strength, so that the electrons of the filament hit the target in a high-energy and high-speed state, thereby generating X-rays. Since the package 421 has both insulation and ray shielding properties, the X-rays generated by the X-ray tube 20 are emitted through the ray exit hole 422 on the package 421.

[0062] According to the embodiment of the present disclosure, the voltage-doubling rectifier circuit 41 and the X-ray tube 20 in the X-ray generator 40 can be packaged in an integrated manner inside the radiation shielding structure 42, and an integrated insulation and radiation shielding design can be performed, which can effectively reduce the materials used for packaging. Moreover, the voltage-doubling rectifier circuit 41 and the X-ray tube 20 can be arranged more closely, effectively saving space, which is conducive to the standardized design of the X-ray generator 40. Moreover, the electrical connection lines between the voltage-doubling rectifier circuit 41 and the X-ray tube 20, namely the anode line 43 and the cathode line 44, are all arranged inside the package 421, and there is no need to consider the insulation problem of the anode line 43 and the cathode line 44 separately. Moreover, the connection lines between the voltage-doubling rectifier circuit 41 and the X-ray tube 20, namely the anode line 43 and the cathode line 44, do not need to pass through other insulation structures or radiation shielding structures, thereby avoiding the local discharge and radiation leakage problems that may exist in the electrical connection lines of the voltage-doubling rectifier circuit and the X-ray tube in the insulation split design mode.

[0063] According to an embodiment of the present disclosure, the radiation shielding structure 42 may further include a first lead 423 and a second lead 424 , wherein the first lead 423 and the second lead 424 are disposed on the package body 421 .

[0064] One end of the first lead 423 extends to the outside of the package 421, and the other end is electrically connected to the input end of the voltage doubler rectifier circuit 41. The first lead 423 is the input power lead of the voltage doubler rectifier circuit 41, and one end thereof extending to the outside of the package 421 can be electrically connected to the high voltage power transformer.

[0065] One end of the second lead 424 extends to the outside of the package 421, and the other end is electrically connected to the cathode 24 of the X-ray tube 20. The second lead 424 is a filament power lead of the cathode 24 of the X-ray tube 20, and one end thereof extending to the outside of the package 421 can be electrically connected to the filament transformer.

[0066] In some embodiments, the first lead 423 and the second lead 424 are integrally cast with the package body 421 , so as to avoid radiation leakage at the contact point between the first lead 423 and the second lead 424 and the package body 421 .

[0067] According to an embodiment of the present disclosure, the voltage doubler rectifier circuit 41 also includes a circuit board, and accordingly, the X-ray tube 20 can also be arranged on the circuit board. Specifically, the voltage doubler rectifier circuit 41 provides physical support and design layout of electronic components (such as diodes, capacitors, resistors, etc.) in the voltage doubler rectifier circuit through the circuit board. In the integrated design structure of the voltage doubler rectifier circuit 41 and the X-ray tube 20, the X-ray tube 20 can also be fixed to the circuit board, which has a compact structure, and the relative positions of the voltage doubler rectifier circuit 41 and the X-ray tube 20 are fixed by the arrangement on the circuit board.

[0068] For example, in one embodiment, when laying out on a circuit board, the first direction from the anode 22 of the X-ray tube 20 to the cathode 24 and the second direction from the first output end (the end connected to the anode line 43) of the voltage doubler rectifier circuit 41 to the second output end (the end connected to the cathode line 44) can meet the parallel condition and have the same direction, wherein the parallel condition includes that the first direction and the second direction are parallel, or the angle between the first direction and the second direction is less than a predetermined first angle threshold (such as 5°, which is only an example). Figure 3 As shown, in the layout of the voltage doubler rectifier circuit 41 and the X-ray tube 20, the high and low voltage directions are the same and substantially parallel, so that the potential difference between the X-ray tube 20 and the voltage doubler rectifier circuit 41 can be small.

[0069] In some embodiments, when the layout of the X-ray tube 20 and the voltage doubler rectifier circuit 41 makes the first direction and the second direction meet the parallel condition and the directions are the same, the layout can be further refined so that the first midpoint of the X-ray tube 20 in the first direction and the second midpoint of the voltage doubler rectifier circuit 41 in the second direction meet the alignment condition, wherein the alignment condition includes that the midpoint line formed by connecting the first midpoint and the second midpoint is perpendicular to one of the first direction and the second direction, or the angles formed by the midpoint line and the first direction and the second direction respectively, and the deviation from the 90° angle is less than the second angle threshold (such as 3°, which is only an example). Figure 3 As shown, the middle positions of the potential distribution from high to low in the voltage doubler rectifier circuit 41 and the X-ray tube 20 are basically aligned, so that the potential between the X-ray tube 20 and the voltage doubler rectifier circuit 41 can be basically evenly distributed, ensuring a small potential difference between them.

[0070] Figure 4 The structure of an X-ray generator 40 according to another embodiment of the present disclosure is schematically shown.

[0071] Combination Figure 3 and Figure 4 The X-ray generator 40 may further include a metal shell 51 and a heat dissipation system 52.

[0072] The metal shell 51 wraps the radiation shielding structure 42 , wherein the space between the metal shell 51 and the packaging body 421 of the radiation shielding structure 42 is filled with first transformer oil. Figure 4 In order to distinguish the metal shell 51 from the package body 421, a dotted frame is used to represent the metal shell 51. The metal shell 51 can be a fully enclosed shell to play a sealing role. The metal shell 51 can also be grounded to play a grounding protection role.

[0073] The heat dissipation system 52 includes a cooling system 521 and a heat exchange pipe 522. The cooling system 521 is arranged outside the metal shell 51. A part of the heat exchange pipe 522 passes through the metal shell 51 and contacts the first transformer oil, and at least a part of the heat exchange pipe 522 is located in the cooling system 521.

[0074] Transformer oil has a heat-conducting effect. The heat exchange pipe 522 can take away the heat generated by the X-ray tube 20 while emitting X-rays by contacting the first transformer oil, and transfer it to the cooling system 521, which cools and dissipates the heat.

[0075] The interior of the package 421 may also be filled with a second transformer oil. Through the heat conduction of the second transformer oil, the heat generated by the X-ray tube 20 may be promptly transferred to the first transformer oil through the wall of the package 421 , facilitating timely heat dissipation of the heat dissipation system 52 .

[0076] In some embodiments, the X-ray generator 40 further includes a filament transformer 53. Figure 3 and Figure 4 , the filament transformer 53 can be electrically connected to one end of the second lead 424 extending to the outside of the package 421. The filament transformer can be arranged between the metal shell 51 and the package 421, such as being immersed in the first transformer oil, and its external lead can extend outward through the package 421, and the structure is compact. Among them, the filament transformer 40 is immersed in the first transformer oil, which can facilitate the first transformer oil to promptly take away the heat generated by the filament transformer 40 during operation.

[0077] The X-ray generator 40 may further include a high-voltage power transformer 54, wherein the high-voltage power transformer 54 is electrically connected to one end of the first lead 423 extending to the outside of the package body 421. The high-voltage power transformer 54 may also be disposed between the metal housing 51 and the package body 421, with a compact structure, and the high-voltage power transformer 54 may be immersed in the first transformer oil, so that the first transformer oil may promptly take away the heat generated by the high-voltage power transformer 54. The external lead of the high-voltage power transformer 54 may extend outward through the package body 421, and is used to be electrically connected to an external initial power source, thereby inputting power to the voltage doubler rectifier circuit 41.

[0078] Those skilled in the art can understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in various embodiments can be freely combined without causing conflicts in structure or principle.

[0079] After describing the preferred embodiments of the present disclosure in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the appended claims, and the present disclosure is not limited to the implementation methods of the exemplary embodiments listed in the specification.

Claims

1. An X-ray generator, characterized in that: The X-ray generator comprises: A voltage doubler rectifier circuit, comprising a plurality of output terminals; at least one X-ray tube, wherein the X-ray tube comprises an anode and a cathode, wherein the anode of the X-ray tube is electrically connected to a first output terminal among the plurality of output terminals, and the cathode of the X-ray tube is electrically connected to a second output terminal among the plurality of output terminals, wherein an output voltage of the first output terminal is higher than an output voltage of the second output terminal; A ray shielding structure comprises a packaging body, wherein the packaging body is provided with a penetrating ray exit hole, wherein the voltage doubler rectifier circuit and the X-ray tube are arranged inside the packaging body, wherein the packaging body has insulation performance and ray shielding performance.

2. The X-ray generator according to claim 1, characterized in that: The voltage doubler rectifier circuit further includes a circuit board; wherein the X-ray tube is arranged on the circuit board.

3. The X-ray generator according to claim 2, characterized in that: A first direction pointing from the anode of the X-ray tube to the cathode and a second direction pointing from the first output end to the second output end satisfy a parallel condition and have the same direction, wherein the parallel condition includes that the first direction and the second direction are parallel, or that the angle between the first direction and the second direction is less than a predetermined first angle threshold.

4. The X-ray generator according to claim 3, characterized in that: A first midpoint of the X-ray tube in the first direction and a second midpoint of the voltage doubler rectifier circuit in the second direction satisfy an alignment condition, wherein the alignment condition includes that a midpoint line formed by connecting the first midpoint and the second midpoint is perpendicular to one of the first direction and the second direction, or that angles formed by the midpoint line and the first direction and the second direction, respectively, deviate from 90° by less than a second angle threshold.

5. The X-ray generator according to claim 1, characterized in that: The radiation shielding structure further includes a first lead and a second lead, wherein the first lead and the second lead are arranged on the package body; wherein, One end of the first lead extends to the outside of the package body, and the other end is electrically connected to the input end of the voltage doubler rectifier circuit; One end of the second lead extends to the outside of the package body, and the other end is electrically connected to the cathode of the X-ray tube.

6. The X-ray generator according to claim 5, characterized in that: The first lead and the second lead are cast integrally with the package body.

7. The X-ray generator according to claim 5, characterized in that: The X-ray generator also includes: a metal shell, wrapping the radiation shielding structure, wherein a first transformer oil is filled between the metal shell and the packaging body of the radiation shielding structure; and The heat dissipation system comprises a cooling system and a heat exchange pipeline, wherein the cooling system is arranged outside the metal shell; a part of the heat exchange pipeline passes through the metal shell and contacts the first transformer oil, and at least another part is located in the cooling system.

8. The X-ray generator according to claim 7, characterized in that: The X-ray generator also includes a filament transformer, wherein the filament transformer is electrically connected to an end of the second lead extending to the outside of the package, wherein the filament transformer is arranged between the metal shell and the package, and the external lead of the filament transformer extends outward through the package.

9. The X-ray generator according to claim 7, characterized in that: The X-ray generator also includes a high-voltage power transformer, wherein the high-voltage power transformer is electrically connected to an end of the first lead extending to the outside of the package; wherein the high-voltage power transformer is arranged between the metal shell and the package, and the external lead of the high-voltage power transformer extends outward through the package.

10. The X-ray generator according to claim 5, characterized in that: The interior of the packaging body is filled with second transformer oil.

11. The X-ray generator according to claim 1, characterized in that: The packaging body is made of lead yellow material.

12. A detection device, characterized in that: The detection device comprises the X-ray generator according to any one of claims 1 to 11.

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