An oil-immersed X-ray source device

Abstract

The present invention belongs to the technical field of X-ray sources, and provides an oil-immersed X-ray source device, which includes an X-ray tube, an oil tank housing, an isolation housing and a high-voltage circuit assembly. The top cover and the oil tank housing jointly form a sealed inner cavity, and insulating oil is filled in the inner cavity. The X-ray tube is installed on the top cover, the isolation housing is arranged in the inner cavity and below the X-ray tube, and the isolation housing forms an isolation cavity communicating with the inner cavity of the oil tank housing; part of the high-voltage circuit assembly is located in the isolation cavity. By arranging an isolation housing in the oil tank housing to install part of the high-voltage circuit assembly, the present invention can effectively insulate and protect the circuit assembly, prevent electrical shock, and improve stability and safety; in addition, insulating oil is also injected into the oil tank housing and the isolation housing. On the one hand, it quickly dissipates heat from the high-voltage circuit assembly by means of oil immersion, and on the other hand, the insulating oil can cooperate with the isolation housing to achieve a double isolation effect, further improving stability and safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of X-ray sources, and particularly relates to an oil-immersed X-ray source device. Background Art

[0002] A closed X-ray source, also known as a closed-type X-ray source. Compared with an open X-ray source, a closed X-ray source does not require frequent maintenance during use and has a lower cost, making it very suitable for systems or devices that require long-term stable operation. Currently, the closed-tube microfocus X-ray source is still the main choice in the field of precision X-ray detection such as integrated circuits, electronics manufacturing, and new energy batteries. The anode of the X-ray tube in the X-ray source needs to be connected to a high-voltage power supply to ensure that sufficient voltage and current can be provided to excite the generation of X-rays. The safety performance of the X-ray source itself is the key to the long-term and stable use of the X-ray source. Currently, in the research and development of X-ray sources, high-stability X-ray sources are the key research and development direction in the industry.

[0003] For the X-ray source to work stably for a long time, it is required that the high-voltage part of the X-ray source has sufficient voltage resistance to avoid damage caused by arc discharge. The insulation structure performance of the high-voltage power supply directly determines the stability of the high-voltage power supply. In addition, the volume of the high-voltage power supply directly affects the volume of the X-ray source. The smaller the volume of the X-ray source, the greater the advantages in transportation, installation, and use.

[0004] Therefore, providing a sufficiently high and stable high voltage for the X-ray tube within a sufficiently small volume is a technical problem that the high-voltage power supply has been seeking to break through. Summary of the Invention

[0005] In view of the problems in the background art, the present invention proposes an oil-immersed X-ray source device.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An oil-immersed X-ray source device, comprising:

[0008] An oil tank housing;

[0009] A top cover, which is installed at the top opening of the oil tank housing and together with the oil tank housing forms a sealed inner cavity filled with insulating oil;

[0010] An X-ray tube, which is installed on the top cover, and the anode connection end extends into the inner cavity;

[0011] An isolation housing, which is arranged in the inner cavity and below the X-ray tube, and the isolation housing forms an isolation cavity communicating with the inner cavity;

[0012] And a high-voltage circuit assembly, including a filtering module, and the filtering module is located in the isolation cavity.

[0013] Preferably, the high-voltage circuit assembly further includes a spark-limiting current-limiting module, which is electrically connected to the X-ray tube and the filtering module respectively;

[0014] The isolation housing includes:

[0015] A first isolation housing, which is arranged at the bottom of the inner cavity and is used for installing the filtering module;

[0016] And a second isolation housing, which is connected to the first isolation housing or the fuel tank housing and is used for installing the spark-limiting current-limiting module.

[0017] Preferably, the first isolation housing is provided with a first connection hole with an upward opening for communicating with the inner cavity of the fuel tank housing;

[0018] The second isolation housing is fixedly connected to the top of the first isolation housing. The second isolation housing has a top opening facing the X-ray tube. At the position of the top opening, the second isolation housing is further provided with a socket mounting plate, and the socket mounting plate is provided with a fourth connection hole for communicating with the inner cavity of the fuel tank housing.

[0019] Preferably, the X-ray source device further includes a high-voltage connector assembly, and the high-voltage connector assembly includes a matching socket and plug;

[0020] The X-ray tube has a mating hole with a downward opening, and the plug is connected to the mating hole;

[0021] The socket is installed through the socket mounting plate and is electrically connected to the spark-limiting current-limiting module. The socket is formed with a jack with an upward opening for plugging and mating with the plug;

[0022] When the plug and the socket are plugged and mated, the connection position of the plug and the socket is located within the top opening of the second isolation housing.

[0023] Preferably, the high-voltage connector assembly further includes a grading ring. After passing through the socket mounting plate, the socket is connected to the grading ring, and the grading ring is located at the connection position of the plug and the jack;

[0024] The surface of the grading ring is provided with a third connection hole communicating with the fourth connection hole.

[0025] Preferably, the surface of the connection end of the plug for connecting the socket is provided with a reed;

[0026] And / or, a crown spring is arranged in the jack.

[0027] Preferably, the X-ray source device further includes an isolation bracket disposed in the inner cavity and fixedly connected to the fuel tank housing and / or the isolation housing. Along the length direction of the fuel tank housing, the isolation bracket and the ray tube are spaced apart from each other;

[0028] The high-voltage circuit assembly further includes:

[0029] A voltage multiplier rectification module, mounted on the isolation bracket and located on the side facing away from the ray tube;

[0030] And a sampling module, mounted on the isolation bracket and electrically connected to the voltage multiplier rectification module and the filtering module respectively.

[0031] Preferably, the fuel tank housing is provided with an installation hole, and a breathing valve is hermetically arranged at the installation hole. The breathing valve includes an elastic valve body and a pressing flange;

[0032] When the elastic valve body is installed on the fuel tank housing, at least part of it protrudes into the inner cavity of the fuel tank housing;

[0033] The pressing flange is connected to the fuel tank housing to press the elastic valve body at the position of the installation hole.

[0034] Preferably, a circular groove is formed on the outer surface of the fuel tank housing around the installation hole;

[0035] A circular mounting portion is formed on the circumferential edge of the elastic valve body. When the elastic valve body is installed on the fuel tank housing, the circular mounting portion is embedded in the circular groove.

[0036] Preferably, the X-ray source device further includes an outer housing, the fuel tank housing is located inside the outer housing, and the outer housing includes:

[0037] A top plate, located on top of the top cover and snap-fitted with the top cover;

[0038] A bottom plate, located at the bottom of the fuel tank housing and snap-fitted with the fuel tank housing;

[0039] A first side baffle, disposed on both sides of the fuel tank housing;

[0040] A second side baffle, starting from one of the first side baffles and extending along the periphery of the fuel tank housing to the other first side baffle and connected to the first side baffle;

[0041] The first side baffle and the second side baffle are connected between the top plate and the bottom plate along the height direction of the fuel tank housing;

[0042] An extension plate, detachably mounted on the second side baffle.

[0043] Preferably, an installation cavity is formed between the outer housing and the fuel tank housing. A support plate is arranged in the installation cavity, and the support plate divides the installation cavity into an upper cavity and a lower cavity;

[0044] An inductor and a high-frequency transformer are installed in the upper cavity. The inductor is located on the support plate and is electrically connected to the high-frequency voltage transformer. The high-frequency transformer is located on the support plate and is used for electrically connecting to the high-voltage circuit component in the fuel tank;

[0045] A heat dissipation device is installed in the lower cavity;

[0046] The second side baffle is provided with upper heat dissipation holes and lower heat dissipation holes. The upper heat dissipation holes are located in the upper cavity, and the lower heat dissipation holes are located in the lower cavity;

[0047] The extension board is located in the lower cavity, and a heat dissipation port is arranged on the surface.

[0048] Advantages of the present invention:

[0049] 1. By arranging an isolation housing in the fuel tank housing to install some high-voltage circuit components, the present invention can effectively provide insulation protection for the circuit components, prevent electrical shock, and improve stability and safety; in addition, insulating oil is injected into the fuel tank housing and the isolation housing. On the one hand, it quickly dissipates heat from the high-voltage circuit components by oil immersion, and on the other hand, the insulating oil can cooperate with the isolation housing to achieve a double isolation effect, further improving stability and safety;

[0050] 2. By arranging an isolation bracket in the fuel tank housing to install some high-voltage circuit components, and at the same time, the isolation bracket is distributed separately from the X-ray tube, the electrical safety of the high-voltage circuit components is ensured and interference is prevented;

[0051] 3. The present invention sets a reed on the plug at the anode connection end of the X-ray tube. By cooperating the reed with the crown spring of the socket jack, the over-current capacity is stronger, and the stability of the X-ray source during use is better;

[0052] 4. The breather valve of the present invention is hermetically installed on the fuel tank housing and has good oil resistance. It can discharge the pressure caused by the thermal expansion of the insulating oil when the device continuously operates and generates heat, and the breather valve is fixed by cooperating the first installation part with the annular slot and then through a flange. Its installation structure is convenient for disassembly and replacement, and easy to repair;

[0053] 5. By arranging some high-voltage circuit components in the installation cavity between the outer housing and the fuel tank housing, the present invention makes reasonable use of space, and when performing maintenance and replacement, only the second side baffle needs to be opened, which is convenient and fast.

[0054] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following briefly introduces the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0056] Figure 1 FIG. shows a three-dimensional structural schematic diagram of an oil-immersed X-ray source device according to a preferred embodiment of the present invention;

[0057] Figure 2 FIG. shows a structural schematic diagram of the second side baffle of the present invention;

[0058] Figure 3 FIG. shows an internal layout diagram of the installation cavity of the present invention;

[0059] Figure 4 FIG. shows a positional relationship diagram of the breathing valve of the present invention;

[0060] Figure 5a FIG. shows a connection relationship diagram of the breathing valve and the fuel tank of the present invention;

[0061] Figure 5b FIG. shows a positional schematic diagram of the mounting holes of the fuel tank housing of the present invention;

[0062] Figure 6 FIG. shows a cross-section of the fuel tank housing of the present invention Figure 1 ;

[0063] Figure 7 FIG. shows a cross-section of the fuel tank housing of the present invention Figure 2 ;

[0064] Figure 8 FIG. shows a three-dimensional view of the first isolation housing, the second isolation housing and the isolation bracket of the present invention;

[0065] Figure 9 FIG. shows a three-dimensional view of the second isolation housing of the present invention;

[0066] Figure 10 FIG. shows a connection relationship diagram of the ray tube and the plug of the present invention;

[0067] Figure 11 FIG. shows a structural schematic diagram of the plug of the present invention;

[0068] Figure 12 Shows a connection schematic diagram of an X-ray tube, a plug, and a socket according to a preferred embodiment of the present invention;

[0069] Figure 13 Shows a three-dimensional structural schematic diagram of a top cover in an X-ray source device according to a preferred embodiment of the present invention.

[0070] In the figure: 1. Top plate; 2. First side baffle; 3. Second side baffle; 301. Upper heat dissipation hole; 302. Lower heat dissipation hole; 303. Window; 4. Bottom plate; 401. Installation groove; 5. Extension plate; 6. X-ray tube; 601. Matching hole; 7. Oil tank housing; 701. Installation hole; 702. Annular clamping groove; 703. Positioning convex block; 8. Inductor; 9. High-frequency transformer; 901. Fixed seat; 10. Support plate; 11. Installation bracket; 12. Breather valve; 1201. Annular installation part; 13. Compression flange; 14. Voltage multiplier rectification module; 15. Sampling module; 16. Filter module; 17. Spark-limiting current module; 18. First isolation housing; 19. Second isolation housing; 1901. Isolation bottom plate; 1902. Isolation cylinder; 1903. First connection hole; 20. Isolation bracket; 2001. Installation pillar; 2002. Pillar side plate; 2003. Pillar convex block; 2004. Pillar bottom plate; 2005. Second connection hole; 21. Top cover; 2101. X-ray tube installation hole; 2102. Transformer oil injection hole; 22. Socket; 2201. Jack; 2202. Crown spring; 23. Grading ring; 2301. Third connection hole; 24. Plug spring; 2401. Threaded end; 2402. Reed end; 2403. Reed; 25. Locking part; 26. Socket mounting plate; 2601. Fourth connection hole. Detailed implementation manners

[0071] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some well-known technical features in the art are not described.

[0072] In order to thoroughly understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention can also have other embodiments and should not be construed as being limited to the embodiments presented here.

[0073] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present invention. The singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms "comprising" and / or "including" are used in this specification, they specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "rear", "left", "right" and similar expressions used in the present invention are for illustrative purposes only and not for limitation.

[0074] The ordinal numbers such as "first" and "second" cited in the present invention are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" does not imply the existence of a "second component" by itself, and the term "second component" does not imply the existence of a "first component" by itself.

[0075] In this article, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0076] Unless otherwise specified, the numerical ranges in this article include not only the entire range within its two endpoints, but also several sub-ranges included therein.

[0077] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0078] An oil-immersed X-ray source device according to the present invention includes an oil tank housing 7, a top cover 21, an X-ray tube 6, an isolation housing and a high-voltage circuit assembly. Among them, the top cover 21 is installed at the top opening of the oil tank housing 7 and together with the oil tank housing 7 forms a sealed inner cavity. The inner cavity is filled with insulating oil. The X-ray tube 6 is installed on the top cover 21, and the anode connection end of the X-ray tube 6 extends into the inner cavity.

[0079] The isolation housing is disposed in the inner cavity and is located below the X-ray tube 6. The isolation housing forms an isolation cavity communicating with the inner cavity. The functions of the high-voltage circuit assembly include providing anode high voltage for the anode of the X-ray tube 6. The high-voltage circuit assembly includes a plurality of circuit modules, and some of the circuit modules are disposed in the isolation cavity. In particular, the high-voltage circuit assembly includes a filtering module 16, and the filtering module 16 is located in the isolation cavity.

[0080] By arranging the isolation housing in the inner cavity, the functions of insulating protection and isolation for the electronic devices in the isolation housing can be achieved. And by placing the filtering module 16 in the isolation housing, the filtering effect can be improved, and electrical shock can be effectively prevented, thereby improving the stability and safety of the X-ray source device; in addition, insulating oil is also injected into the oil tank housing and the isolation housing. On the one hand, the high-voltage circuit assembly can be quickly cooled by the oil immersion method, and on the other hand, the insulating oil can cooperate with the isolation housing to achieve a double isolation effect, further improving the stability and safety.

[0081] Some preferred embodiments of the oil-immersed X-ray source device will be described below with reference to the accompanying drawings.

[0082] Reference Figures 1 to 13 , an oil-immersed X-ray source device according to an embodiment of the present invention includes an outer housing, an X-ray tube 6, an oil tank housing 7, an isolation housing, and a high-voltage circuit assembly. A top cover 21 is installed at the top opening of the oil tank housing 7, and the top cover 21 and the oil tank housing 7 together form a sealed inner cavity, and insulating oil is filled in the inner cavity. The X-ray tube 6 is installed on the top cover 21, its anode connection end extends into the inner cavity, and the cathode end extends to the outside of the outer housing. The isolation housing is disposed in the inner cavity and is located below the X-ray tube 6, and the isolation housing forms an isolation cavity communicating with the inner cavity of the oil tank housing 7; the high-voltage circuit assembly includes a filtering module 16, and the filtering module 16 is located in the isolation cavity. The external body is installed outside the oil tank housing 7, and an installation cavity is formed between the two, and some high-voltage circuit components can be assembled in the installation cavity.

[0083] It should be noted that by arranging the isolation housing in the oil tank housing 7 to install some high-voltage circuit components, the circuit components can be effectively insulated and protected, electrical shock can be prevented, and the stability and safety can be improved; in addition, insulating oil is also injected into the oil tank housing 7 and the isolation housing. On the one hand, the high-voltage circuit assembly can be quickly cooled by the oil immersion method, and on the other hand, the insulating oil can cooperate with the isolation housing to achieve a double isolation effect, further improving the stability and safety. Therefore, the purpose of the device isolation housing is to ensure electrical safety and prevent interference, isolate electrical components, and avoid the risks of short circuit and electric shock. In addition, the isolation housing also helps to reduce electromagnetic interference.

[0084] Exemplarily, the insulating oil can be transformer oil.

[0085] Such as Figure 1As shown in the figure, the outer casing is composed of a top plate 1, a first side baffle 2, a second side baffle 3, a bottom plate 4, an extension plate 5, an X-ray tube 6, etc. Among them, the first side baffle 2 and the second side baffle 3 are installed between the top plate 1 and the bottom plate 4, the extension plate 5 is installed on the surface of the second side baffle 3, and the cathode end of the X-ray tube 6 extends to the outside of the outer casing.

[0086] Combined Figure 2 with Figure 3 it can be known that the top plate 1 is installed on the surface of the fuel tank casing 7, and the bottom plate 4 is connected to the bottom of the fuel tank casing 7; the first side baffles 2 are symmetrically arranged on both sides of the fuel tank casing 7, and both ends are respectively connected to the top plate 1 and the bottom plate 4 along the height direction of the fuel tank casing 7, and there is a gap between the first side baffle 2 and the fuel tank casing 7.

[0087] Both ends of the second side baffle 3 are respectively connected to the top plate 1 and the bottom plate 4 along the height direction of the fuel tank casing 7, starting from the first side baffle 2 on one side, extending to the first side baffle 2 on the other side along the periphery of the fuel tank casing 7, and connected to the first side baffle 2. Moreover, there is an installation cavity between the second side baffle 3 and the front surface of the fuel tank casing 7 for installing some high-voltage circuit components.

[0088] It should be noted that Figure 2 on the side surface of the second side baffle 3 in [a certain context], there are upper heat dissipation holes 301 and lower heat dissipation holes 302 to facilitate the heat dissipation of the high-voltage circuit components in the installation cavity. Preferably, the upper heat dissipation holes 301 and the lower heat dissipation holes 302 can be strip-shaped holes, and the openings face the lower side. On the front surface of the second side baffle 3, there is a window 303, and the detachable extension plate 5 can be installed in this window 303.

[0089] It should be further noted that Figure 3 in [a certain context], generally, a circuit board is arranged on the inner side of the extension plate 5, and the circuit board is electrically connected to a power supply interface, a signal interface, a communication interface, and a chassis ground wire, all of which are exposed from the extension plate 5. The X-ray source device in this embodiment communicates with the outside through RS232 and controls the operation of the device by setting parameters. It can also be adjusted according to actual needs, such as setting other types of communication interfaces. There can be two or more communication interfaces. The X-ray source device is also designed with status indicators, including a working status indicator and a fault status indicator, and the colors when the two are lit are different. For example, the working status is green and the fault status is yellow. Therefore, through holes for exposing the power supply interface, signal interface, communication interface, chassis ground wire, and status indicators are provided on the extension plate 5. And heat dissipation openings for exposing the heat dissipation device. In the illustrated example, the heat dissipation device is a fan.

[0090] In addition, when it is necessary to repair the fuel tank, the first side baffle 2 can be removed; when it is necessary to repair and replace the electrical equipment in the installation cavity, only the second side baffle 3 needs to be removed, which is very convenient to use.

[0091] As Figure 3 shown, a support plate 10 and a mounting bracket 11 are provided in the installation cavity. The support plate 10 is placed substantially horizontally and fixedly connected to the mounting bracket 11, dividing the installation cavity into an upper cavity and a lower cavity. The mounting bracket 11 is located at the edge of the support plate 10, connected to the support plate 10 at one end and to the bottom plate 4 at the other end.

[0092] Combined with Figure 3 it can be seen that some high-voltage circuit components are installed in the upper cavity, including an inductor 8 and a high-frequency transformer 9. The inductor 8 is located on the support plate 10 and electrically connected to the high-frequency transformer 9. A fixing seat 901 is provided around the high-frequency transformer 9 and then installed on the support plate 10 through the fixing seat 901, and is used to be electrically connected to the high-voltage circuit components in the fuel tank.

[0093] Combined with Figure 4 it can be seen that an installation groove 401 is provided on the bottom plate 4 of the lower cavity, and a heat dissipation device can be installed on the installation groove 401. In this embodiment, the mounting bracket 11 is installed on the installation groove 401 through fasteners. It can be understood that by removing a part of the bottom plate 4, the space of the installation cavity can be increased, and the inner wall of the installation groove 401 can be used to limit the components installed in the groove, so that the components in the installation cavity and the components on the mounting bracket 11 can be stably supported on the bottom plate 4.

[0094] It should be noted that placing the high-frequency transformer 9 outside the fuel tank housing 7 helps to improve the heat dissipation efficiency, because the heat generated by the transformer can be more directly dissipated into the air rather than being conducted through the fuel tank housing 7. Moreover, the externally placed high-frequency transformer 9 is easier to perform daily inspections and maintenance, because the transformer can be accessed without opening the fuel tank housing 7. In addition, since the high-frequency transformer 9 does not directly contact the insulating oil, the risk of contamination of the insulating oil can be reduced when the transformer fails.

[0095] It should be further noted that, combined with Figure 3 and Figure 4 it can be seen that the heat dissipation device can dissipate heat quickly through the upper heat dissipation holes 301, the lower heat dissipation holes 302 in Figure 3 and the fan heat dissipation openings on the extension plate 5. The upper heat dissipation holes 301 are located in the upper cavity position, and the lower heat dissipation holes 302 are located in the lower cavity position.

[0096] As Figure 4 and Figure 5b shown, an installation hole 701 is provided on the surface of the fuel tank housing 7 facing the installation cavity, and a coaxial annular slot 702 is provided around the installation hole 701.

[0097] As Figure 5aAs shown, a breather valve 12 is sealingly arranged at the installation hole 701. The breather valve 12 includes an elastic valve body and a pressing flange 13. When the elastic valve body is installed on the fuel tank housing 7, at least part of it protrudes into the inner cavity of the fuel tank housing 7. The pressing flange 13 is connected to the fuel tank housing 7 to press the elastic valve body at the position of the installation hole 701.

[0098] Furthermore, an annular installation portion 1201 is formed at the circumferential edge of the elastic valve body. When the elastic valve body is installed on the fuel tank housing 7, the annular installation portion 1201 is embedded in the annular clamping groove 702. A number of screw holes are also provided outside the annular clamping groove 702 for installing the pressing flange 13.

[0099] It should be noted that the middle of the breather valve 12 is made of elastic material and is recessed towards the inside of the fuel tank housing 7. The breather valve 12 is sealingly installed on the fuel tank housing 7 and has good oil resistance. It can release the pressure caused by the thermal expansion of the insulating oil when the device continuously operates and generates heat to cause temperature rise (the size requirement of the breather valve 12 is that the deformation volume of the elastic valve body can completely absorb the expansion volume of the transformer oil generated during the use of the X-ray source).

[0100] See Figure 5a , the elastic valve body of the breather valve 12 is constructed by a connected cylindrical section and a conical section. This structure not only ensures the sealing performance under normal pressure but also can release pressure through deformation when the pressure increases, achieving a perfect combination of structure and function. When the X-ray source device is working, the volume of the transformer oil in the inner cavity of the fuel tank gradually increases after being heated. Since the conical section has a larger contact area with the transformer oil and the pressure is concentrated at its top, it will deform prior to the cylindrical section that is evenly stressed circumferentially, for the preliminary release of pressure. Then, when the pressure of the transformer oil gradually increases, the cylindrical section will also gradually deform and be slowly extruded out of the installation hole 701, thereby achieving pressure reduction. Through the segmented pressure reduction, the slow change of pressure can be realized, maintaining a small change amplitude and improving the operating stability of the device. It should be noted that the "cylindrical section" and "conical section" described in the previous text refer to approximately this shape, not a shape limitation.

[0101] As Figure 6 shown, the isolation housing is located in the fuel tank housing 7 and includes a first isolation housing 18 and a second isolation housing 19. The top opening of the fuel tank housing 7 is sealingly installed with a top cover 21, and the top cover 21 is clamped with the top plate 1. The first isolation housing 18 is laid on the bottom of the inner cavity of the fuel tank housing 7 for installing the filtering module 16. The second isolation housing 19 is connected to the first isolation housing 18 or the fuel tank housing 7. Along the height direction of the fuel tank housing 7, the second isolation housing 19 is located below the ray tube 6 for installing the arc suppression current limiting module 17.

[0102] It should be noted that the multiple circuit modules of the high-voltage circuit assembly further include a filtering module 16 and a spark-limiting current-limiting module 17, wherein the spark-limiting current-limiting module 17 is electrically connected to the ray tube 6 and the filtering module 16 respectively. Additionally, in other preferred solutions, the second isolation housing 19 can also be connected to the first isolation housing 18.

[0103] The second isolation housing 19 is installed on the surface of the first isolation housing 18; the isolation bracket 20 is located on one side of the second isolation housing 19, with one end connected to the first isolation housing 18 and the other end connected to the top cover 21. Part of the high-voltage circuit assembly is installed on the inner cavity of the first isolation housing 18, the inner cavity of the second isolation housing 19, and the isolation bracket 20. Additionally, the ray tube 6 is installed inside the fuel tank housing 7, and the cathode end of the ray tube 6 is installed on the top cover 21, and the anode end extends into the fuel tank housing 7 and is connected to the power electronic module inside the second isolation housing 19. Additionally, the fuel tank housing 7, the first isolation housing 18, and the second isolation housing 19 are all filled with transformer oil to isolate this part of the high-voltage circuit assembly.

[0104] It should be noted that in the fuel tank housing 7, the first isolation housing 18 and the second isolation housing 19 can play an isolation role for the high-voltage circuit assembly, avoiding the risks of short circuit and electric shock, and also helping to reduce electromagnetic interference. Additionally, after injecting transformer oil, it can achieve a double isolation effect on the power electronic modules inside the first isolation housing 18 and the second isolation housing 19, and the transformer oil helps with heat dissipation, further improving the stability and reliability of the device operation.

[0105] It should be further noted that, as can be seen from Figure 6 , the top plate 1 is installed on the surface of the top cover 21. Specifically, the top plate 1 and the top cover 21 can be installed and positioned through a positioning component. The positioning component can include a matching protrusion and groove, with one of the protrusion and groove set on the top cover 21, and the other of the protrusion and groove set on the top cover 21. Moreover, the top cover 21 and the fuel tank housing 7 can be connected through a locking member 25 (screw), and at the same time, a sealing ring is used to improve the sealing performance (see Figure 7 ).

[0106] Similarly, as shown in Figure 6 and Figure 7 , in this embodiment, positioning bumps 703 are also provided at the bottom of the fuel tank housing 7. By the snap-fit cooperation between the positioning bumps 703 and the bottom plate 4, the stability between the fuel tank housing 7 and the outer housing can be ensured, and at the same time, the reliable grounding of the fuel tank housing 7 can also be ensured.

[0107] It can be understood that in this embodiment, since the fuel tank (the fuel tank housing 7 and the top cover 21) and the outer housing are installed and positioned in a snap-fit manner, the production and installation efficiency of the X-ray source device can be improved.

[0108] As shown Figure 7 in the figure, a gap is provided between the first side baffle 2 and the fuel tank housing 7. Exemplarily, in order to improve the heat dissipation uniformity of the fuel tank during operation, the distances between the three surfaces of the installed fuel tank housing 7 corresponding to the three surfaces of the first side baffle 2 can be made substantially the same, thereby forming a clamping cavity structure around the fuel tank housing 7. The heat generated by the fuel tank housing 7 can be evenly dispersed in the clamping cavity. Referring to the foregoing, this clamping cavity can communicate with the fan and the heat dissipation holes (upper heat dissipation hole 301 and lower heat dissipation hole 302) on the second side baffle 3 to form a air flow channel, and this layout significantly improves the heat dissipation efficiency of the X-ray source device.

[0109] In this embodiment, the fuel tank housing 7 includes an inner layer and an outer layer. The inner layer is made of an insulating material, and a conductive material layer is laid / attached outside the insulating material, which can achieve the function of ensuring safety with a uniform electric field. Specifically, the inner layer can be made of a non-metallic insulating material. The non-metallic inner layer design can effectively improve the high-voltage insulation performance of the entire ray source device and reduce the volume and weight of the device; the outer layer is designed to be conductive and reliably grounded (the outer housing is made of a conductive material and is in contact with the fuel tank housing 7 during installation), which can effectively discharge the accumulated charges of the fuel tank in the high-voltage electric field and at the same time build a stable electric field working environment for the ray tube 6.

[0110] Furthermore, the X-ray source device further includes an isolation bracket 20, and the isolation bracket 20 is disposed in the inner cavity. The isolation bracket 20 can be fixedly connected to at least one of the fuel tank housing 7 and the isolation housing. Refer to Figure 6 and Figure 7 , a voltage multiplier rectification module 14 and a sampling module 15 in the high-voltage circuit assembly are installed on the isolation bracket, and the sampling module 15 is electrically connected to the voltage multiplier rectification module 14 and the filtering module 16 respectively. The voltage multiplier rectification module 14 is also used to be electrically connected to the high-frequency transformer 9 outside the fuel tank housing 7. In this embodiment, the isolation bracket 20 and the ray tube 6 are spaced apart along the length direction of the fuel tank housing 7. Protect the high-voltage circuit assembly in the fuel tank housing 7 and improve the insulation effect of the ray source device to ensure the stability of its performance.

[0111] It should be noted that in an alternative embodiment, the isolation bracket 20 can be a part of the first isolation housing 18, specifically see Figure 8 and Figure 9 .

[0112] As shown Figure 8 and 9 in the figure, the isolation bracket 20 includes an installation pillar 2001, a pillar side plate 2002, a pillar convex block 2003 and a pillar bottom plate 2004. One end of the installation pillar 2001 is connected to the pillar bottom plate 2004, and the other end is provided with the pillar convex block 2003. The pillar convex block 2003 can be snap-connected to the top cover 21 (seeFigure 7 ).

[0113] In this embodiment, the support base plate 2004 constitutes a part of the first isolation shell 18 (the top of the first isolation shell 18). Under the premise of ensuring the isolation effect, the structure of the X-ray source device is further simplified, the assembly is convenient, the weight of the product is reduced, and the cost is reduced.

[0114] like Figure 8 As shown, the support base plate 2004 is provided with a second connecting hole 2005 , and the second connecting hole 2005 is used to connect the inner cavity of the first isolation shell 18 and the oil tank shell 7 . Figure 8 In the figure, the pillar side plate 2002 is provided with a plurality of blocks, which are respectively connected to different surfaces of the mounting pillar 2001.

[0115] Furthermore, combined with Figure 6 and Figure 7 It can be seen that the voltage doubler rectifier module 14 is installed on the surface of one pillar side plate 2002, separated from the ray tube 6; the sampling module 15 is installed on the surface of another pillar side plate 2002, separated from the ray tube 6. In particular, since there is a large voltage difference between the access end of the voltage doubler rectifier module 14 and the anode connection end of the ray tube 6, the voltage doubler rectifier module 14 is installed on the side away from the ray tube 6 to improve the insulation effect of the ray source device to ensure the stability of its performance. The sampling module 15 can be used to collect voltage data and current data in the circuit in the oil tank housing 7. In this way, the anode voltage of the ray tube 6 in the oil tank housing 7 can be determined.

[0116] The filter module 16 is installed in the inner cavity of the first isolation shell 18 and is electrically connected to the ignition current limiting module 17. The ignition current limiting module 17 is installed in the inner cavity of the second isolation shell 19 and is electrically connected to the ray tube 6.

[0117] It should be noted that in the X-ray source device, the high-voltage circuit assembly also has a 24V DC power supply and an inverter device. The 24V DC power supply serves as the power supply for the entire system, and first provides stable DC power for the inverter device. The inverter device converts DC power into high-frequency AC power, and then increases or converts the voltage through the high-frequency transformer 9. After passing through the high-frequency transformer 9, the AC power is sent to the voltage doubler rectifier module 14, which converts the AC power into the required high-voltage DC power. The sampling module 15 is used to monitor and adjust the output voltage to ensure that the voltage is stable at the set value. The filter module 16 is used to remove high-frequency noise in the voltage to ensure that the output DC power is pure. Finally, the spark current limiting module 17 is used to limit the current to prevent excessive current caused by the spark phenomenon and protect the safe and stable operation of the entire system. These devices are connected in the above order to jointly ensure the normal operation of the X-ray source device.

[0118] Further, the second isolation housing 19 is fixedly connected to the top of the first isolation housing 18. Specifically, as Figure 8 shown, the second isolation housing 19 includes an isolation bottom plate 1901 and an isolation cylinder 1902. The isolation bottom plate 1901 abuts against the pillar bottom plate 2004 on one side, and the two together form the top of the first isolation housing 18. An upward-opening first connection hole 1903 is provided on the surface of the isolation bottom plate 1901, and the first connection hole 1903 is used to communicate the inner cavities of the first isolation housing 18 and the fuel tank housing 7; one end of the isolation cylinder 1902 is connected to the isolation bottom plate 1901, and the inside is used to install the ignition current-limiting module 17, and the top opening faces the X-ray tube 6. In addition, a socket mounting plate 26 is provided at the position of the top opening of the isolation cylinder 1902, and a fourth connection hole 2601 is provided on the surface of the socket mounting plate 26, and the fourth connection hole 2601 is used to communicate the inner cavities of the isolation cylinder 1902 and the fuel tank housing 7.

[0119] It should be noted that Figure 8 the combined structure of the first isolation housing 18 in

[0120] is only one implementation manner, which is convenient for disassembly and assembly. The first isolation housing 18 can also be designed as an integral closed structure including the isolation bottom plate 1901 and the pillar bottom plate 2004 at the top.

[0121] Exemplarily, the plug can be a plug spring 24 (refer to a banana plug). The first end of the plug spring 24 is a threaded end 2401, and the second end of the plug spring 24 is a reed end 2402, which is used for plugging and mating with the jack 2201.

[0122] An outwardly protruding reed 2403 is designed on the outer surface of the reed end 2402. When the second end of the plug spring 24 is inserted into the jack 2201, the reed 2403 contacts the inner wall of the jack 2201 and is deformed under pressure. The elastic force generated by the deformation of the reed 2403 ensures that the plug spring 24 can be tightened against the jack 2201 through the reed end 2402. Thus, a reliable connection between the plug and the socket 22 can be achieved, and further a reliable connection between the X-ray tube 6 and the anode high-voltage power supply (i.e., the high-voltage output end) can be ensured.

[0123] In other embodiments of the present application, the plug can also be a pin matching the size of the jack 2201, and one end of the pin and the mating hole 601 are fixedly connected to each other. In order to improve the reliability of the electrical connection, a crown spring 2202 is selected to be provided in the jack 2201.

[0124] When the ray tube 6 is installed, the lower end of the pin can be inserted and fitted with the crown spring 2202 in the jack 2201, and the body of the crown spring 2202 can form electrical contact with the jack 2201. After the pin is inserted, the spring pieces of the crown spring 2202 will be elastically deformed under the extrusion of the pin, and the contact parts of the spring pieces can be in close contact with the surface of the pin under the action of elastic force to form a reliable electrical connection.

[0125] Of course, like in the illustrated embodiment, the plug can use the plug spring 24, and at the same time, the crown spring 2202 is arranged in the jack 2201 of the socket 22. The following will be specifically described in combination with Figures 10 - 12 For specific illustration.

[0126] As Figure 10 As shown in (a and b), the high-voltage connector assembly includes the socket 22, the grading ring 23 and the plug spring 24, and the sizes of the socket 22 and the plug spring 24 are matched. This high-voltage connector assembly is installed at the connection between the ray tube 6 and the spark-limiting current-limiting module 17.

[0127] The anode connection end of the ray tube 6 has a mating hole 601 with the opening facing downwards, and the plug spring 24 is connected to the mating hole 601.

[0128] As Figure 11 As shown, the socket 22 is installed through the socket mounting plate 26 and is electrically connected to the spark-limiting current-limiting module 17. The socket 22 is formed with a jack 2201 with the opening facing upwards for plugging and mating with the plug spring 24. When the plug spring 24 and the socket 22 are plugged and mated, the connection position of the plug spring 24 and the socket 22 is located within the top opening of the second isolation housing 19. When the plug spring 24 and the jack 2201 are mated, the mating position of the high-voltage connector assembly is located within the space enclosed by the second isolation housing 19, and the second isolation housing 19 can play a good role in isolating the high-voltage connection position.

[0129] The crown spring 2202 is arranged in the jack 2201. In combination with Figure 12 , one end of the plug spring 24 is set as the threaded end 2401, and the other end is set as the spring piece end 2402. The threaded end 2401 is connected to the mating hole 601 of the ray tube 6. Moreover, the spring piece end 2402 is inserted into the jack 2201, and a spring piece 2403 protruding from the columnar surface of the spring piece end 2402 and mating with the crown spring 2202 is arranged on the surface of the spring piece end 2402. After the spring piece end 2402 is inserted into the jack 2201, the spring piece 2403 is deformed to tightly press against the inner wall of the jack 2201 to realize the tight connection between the ray tube 6 and the high-voltage output end.

[0130] It should be noted that the socket 22 is arranged on the top of the ignition current-limiting module 17 and is electrically connected to the ignition current-limiting module 17. The crown spring 2202 can cooperate better with the reed end 2402 of the plug spring 24. In addition, the plug spring 24 is directly connected to the X-ray tube 6, and the plug spring 24 is directly connected to the socket 22, both of which have stronger overcurrent capacity, making the X-ray source more stable during use.

[0131] Furthermore, in Figure 11 the socket 22 passes through the socket mounting plate 26 and is connected to the equipotential ring 23, preferably by threaded connection. The equipotential ring 23 can be polished, and the equipotential ring 23 is located on the surface of the socket mounting plate 26 (at the connection position of the plug spring 24 and the jack 2201), and the surface of the equipotential ring 23 is provided with a third connection hole 2301 communicating with the fourth connection hole 2601.

[0132] It should be noted that the transformer oil in the fuel tank housing 7 can enter the fourth connection hole 2601 through the third connection hole 2301 and then fill the inner cavity of the second isolation housing 19. At this time, the ignition current-limiting module 17 achieves a double isolation effect through the transformer oil and the second isolation housing 19.

[0133] It should be further noted that double isolation is adopted in both the first isolation housing 18 and the second isolation housing 19. The transformer oil can not only play a role in heat dissipation, but also effectively isolate the electric arc, preventing fires or explosions caused by the electric arc. The housing isolation further ensures the isolation of the electrical equipment from the external environment, reducing the probability of danger. In addition, the double isolation design of the oil and the housing can reduce the influence of the external environment on the electrical equipment, such as dust and moisture, thereby improving the stability and reliability of the equipment operation. At the same time, the isolation measures can reduce the wear and corrosion of the electrical equipment and extend the service life of the equipment.

[0134] As Figure 13 shown, it is a schematic diagram of the upper surface of the top cover 21, which is provided with an X-ray tube mounting hole 2101 and a transformer oil injection hole 2102. The X-ray tube mounting hole 2101 can mount the cathode end of the X-ray tube 6, and the transformer oil injection hole 2102 is used to inject insulating oil into the fuel tank housing 7.

[0135] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil-immersed X-ray source device, characterized in that, Comprising: A fuel tank housing (7); A top cover (21), which is installed at the top opening of the fuel tank housing (7) and forms a sealed inner cavity together with the fuel tank housing (7), and the inner cavity is filled with insulating oil; An X-ray tube (6), which is installed on the top cover (21), and the anode connection end extends into the inner cavity; A high-voltage circuit assembly, including a filtering module (16) and a spark-limiting current-limiting module (17), and the spark-limiting current-limiting module (17) is electrically connected to the X-ray tube (6) and the filtering module (16) respectively; And an isolation housing, which is arranged in the inner cavity and below the X-ray tube (6), and the isolation housing forms an isolation cavity communicating with the inner cavity; The isolation housing includes: A first isolation housing (18), which is arranged at the bottom of the inner cavity and is used for installing the filtering module (16); And a second isolation housing (19), which is connected to the first isolation housing (18) or the fuel tank housing (7) and is used for installing the spark-limiting current-limiting module (17), and the second isolation housing (19) has a top opening facing the X-ray tube (6).

2. The oil-immersed X-ray source device according to claim 1, characterized in that The first isolation housing (18) is provided with a first connection hole (1903) with an upward opening for communicating with the inner cavity of the fuel tank housing (7); The second isolation housing (19) is fixedly connected to the top of the first isolation housing (18), and a socket mounting plate (26) is further arranged at the position of the top opening of the second isolation housing (19), and the socket mounting plate (26) is provided with a fourth connection hole (2601), and the fourth connection hole (2601) is used for communicating with the inner cavity of the fuel tank housing (7).

3. The oil-immersed X-ray source device according to claim 2, wherein, The X-ray source device further includes a high-voltage connector assembly, and the high-voltage connector assembly includes a matching socket (22) and a plug; The X-ray tube (6) has a mating hole (601) with a downward opening, and the plug is connected to the mating hole (601); The socket (22) is penetrated and installed on the socket mounting plate (26) and is electrically connected to the spark-limiting current-limiting module (17), and the socket (22) is formed with a jack (2201) with an upward opening for plugging and mating with the plug; When the plug and the socket (22) are plugged and mated, the connection position of the plug and the socket (22) is located within the top opening of the second isolation housing (19).

4. An oil-immersed X-ray source device according to claim 3, wherein The high-voltage connector assembly further includes a grading ring (23), the socket (22) is connected to the grading ring (23) after passing through the socket mounting plate (26), and the grading ring (23) is located at the connection position of the plug and the jack (2201); The surface of the grading ring (23) is provided with a third connection hole (2301) communicating with the fourth connection hole (2601).

5. An oil-immersed X-ray source device according to claim 3, characterized in that, A reed (2403) is arranged on the surface of the connection end of the plug for connecting the socket (22); And / or, a crown spring (2202) is arranged in the jack (2201).

6. The oil-immersed X-ray source device according to claim 1, characterized in that, The X-ray source device further comprises an isolation bracket (20), the isolation bracket (20) being arranged in the inner cavity and fixedly connected to the oil tank housing (7) and / or the isolation housing, and the isolation bracket (20) and the ray tube (6) being spaced apart and distributed along the length direction of the oil tank housing (7); The high voltage circuit assembly further comprises: A voltage doubler rectifier module (14) mounted on the isolation bracket (20) and located on a side facing away from the ray tube (6); And, a sampling module (15) is mounted on the isolation bracket (20) and is electrically connected to the voltage doubler rectifier module (14) and the filter module (16) respectively.

7. An oil-immersed X-ray source device according to claim 1, characterized in that, The oil tank housing (7) is provided with a mounting hole (701), and a breathing valve (12) is sealedly provided at the mounting hole (701), wherein the breathing valve (12) comprises an elastic valve body and a clamping flange (13); When the elastic valve body is mounted on the oil tank housing (7), it at least partially protrudes toward the inner cavity of the oil tank housing (7); The clamping flange (13) is connected to the oil tank housing (7) to clamp the elastic valve body at the position of the mounting hole (701).

8. An oil-immersed X-ray source device according to claim 7, characterized in that, An annular groove (702) is formed on the outer surface of the oil tank housing (7) around the mounting hole (701); An annular mounting portion (1201) is formed on the circumferential edge of the elastic valve body; when the elastic valve body is mounted on the oil tank housing (7), the annular mounting portion (1201) is embedded in the annular clamping groove (702).

9. An oil-immersed X-ray source device according to any one of claims 1 to 8, characterized in that, The X-ray source device further comprises an outer shell, the oil tank shell (7) is located inside the outer shell, and the outer shell comprises: A top plate (1) located on the top of the top cover (21) and snap-fitted with the top cover (21); A bottom plate (4) is located at the bottom of the oil tank housing (7) and is snap-fitted with the oil tank housing (7); A first side baffle (2) is arranged on both sides of the oil tank housing (7); A second side baffle (3) starts from the first side baffle (2) on one side, extends along the periphery of the oil tank housing (7) to the first side baffle (2) on the other side, and is connected to the first side baffle (2); The first side baffle (2) and the second side baffle (3) extend along the height direction of the oil tank housing (7) and are connected between the top plate (1) and the bottom plate (4); The expansion plate (5) is detachably mounted on the second side baffle plate (3).

10. The oil-immersed X-ray source device according to claim 9, characterized in that, An installation cavity is formed between the outer shell and the oil tank shell (7), a support plate (10) is arranged in the installation cavity, and the support plate (10) divides the installation cavity into an upper cavity and a lower cavity; An inductor (8) and a high-frequency transformer are installed in the upper cavity. The inductor (8) is located on the support plate (10) and is electrically connected to the high-frequency transformer (9). The high-frequency transformer (9) is located on the support plate (10) and is used to be electrically connected to the high-voltage circuit component in the oil tank. A heat dissipation device is installed in the lower cavity; The second side baffle (3) is provided with an upper heat dissipation hole (301) and a lower heat dissipation hole (302), the upper heat dissipation hole (301) is located in the upper cavity, and the lower heat dissipation hole (302) is located in the lower cavity; the expansion board (5) is located in the lower cavity, and a heat dissipation port is provided on the surface.

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