Plug-in type X-ray source device

Abstract

The utility model relates to the technical field of ray devices, in particular to a plug-in type X-ray source device. Comprising an oil tank filled with insulating oil, an X-ray tube mounted on the oil tank and a high-voltage circuit assembly for supplying power to the X-ray tube. The X-ray tube and the high-voltage circuit assembly are connected through an electrical connector. The electrical connector comprises a plug and an adapter which are matched with each other. The adapter is electrically connected to the power supply end of the high-voltage circuit assembly in the height direction of the oil tank, the X-ray tube is provided with a mounting hole with a downward opening, and the mounting hole is conductively connected with an anode of the X-ray tube. The plug comprises a fixed end and a plugging end, the fixed end is detachably and fixedly connected to the mounting hole, and the plugging end is used for being connected to the adapter in a plugging mode. The quick and reliable connection between the high-voltage circuit assembly and the X-ray tube can be realized through the plug and the adapter, so that the quick disassembly and assembly of the X-ray source device can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of ray devices, in particular to a plug-in type X-ray source device. Background Art

[0002] In the existing X-ray sources, the anode of the ray tube is usually directly connected to the high-voltage power supply through a high-voltage cable; for the case where the anode target disc rotates, a more complex electrical connection component is required to achieve a reliable connection between the ray tube and the high-voltage power supply. The connection devices between the ray tube and the high-voltage power supply are all relatively complex, with high production costs, and are not convenient for the installation, disassembly and maintenance of the ray source in the later stage. Once a failure occurs, the whole machine needs to be replaced. Content of the Utility Model

[0003] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a plug-in type X-ray source device. The utility model adopts a plug-in type connector, which can realize the quick connection between the X-ray tube and the power supply equipment, thereby improving the working efficiency.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] The plug-in type X-ray source device includes an oil tank filled with insulating oil, an X-ray tube installed on the oil tank, and a high-voltage circuit component for supplying power to the X-ray tube. It further includes an electrical connector, and the electrical connector includes a matching plug and adapter. Along the height direction of the oil tank, the adapter is electrically connected to the power supply end of the high-voltage circuit component. The X-ray tube has an installation hole with an opening facing downwards, and the installation hole is electrically connected to the anode of the X-ray tube. The plug includes a fixed end and a plugging end, the fixed end is detachably fixed to the installation hole, and the plugging end is used for plugging connection to the adapter.

[0006] As a further scheme of the utility model: the adapter has an axial hole for plugging and matching with the plugging end, a crown spring is coaxially fixed in the axial hole of the adapter, and the crown spring is electrically connected to the high-voltage circuit component; and / or the plug is provided with an outwardly protruding elastic piece on the outer surface of the plugging end.

[0007] As a further scheme of the utility model: the plug is coaxially provided with an external thread at the fixed end to form a threaded rod; the installation hole is an installation screw hole, and the threaded rod is coaxially threadedly connected in the installation screw hole.

[0008] As a further scheme of the utility model: a second insulating housing is fixedly installed in the oil tank, and the adapter is fixedly installed in the second insulating housing; along the height direction, the second insulating housing is located below the installation hole, and the top of the second insulating housing has an opening. When the plug and the adapter are plugged and matched, the connection position of the plug and the adapter is located within the top opening of the second insulating housing.

[0009] As a further solution of the present utility model: the adapter is of a two-stage stepped shape with a smaller upper part and a larger lower part, and an external thread is coaxially provided on the outer side of its small-diameter section; positioning lugs are fixed at the opening on the top of the second insulating housing, a guiding hole is provided on the positioning lugs, the small-diameter section of the adapter coaxially passes through the guiding hole, and is threadedly connected with a grading ring provided with an internal threaded hole, so that the adapter, the positioning lugs and the grading ring are fixedly connected into one body.

[0010] As a further solution of the present utility model: the high-voltage circuit assembly includes a sparking current-limiting device, the sparking current-limiting device is installed in the internal cavity of the second insulating housing and is electrically connected to the adapter; the grading ring is provided with second connection holes communicating the internal cavity of the second insulating housing and the internal part of the box body, and each of the second connection holes is uniformly distributed on the annular surface of the grading ring along the circumferential direction of the grading ring.

[0011] As a further solution of the present utility model: the high-voltage circuit assembly further includes a voltage-doubling rectifying device, a sampling device and a filtering device installed in the fuel tank, and a high-frequency transformer installed outside the fuel tank and used for connecting an external power supply and boosting the external power supply; the high-frequency transformer, the voltage-doubling rectifying device, the sampling device, the filtering device, and the sparking current-limiting device are electrically connected in sequence, and the high-frequency transformer is also electrically connected to the cathode of the X-ray tube through a wire.

[0012] As a further solution of the present utility model: mounting supports are fixedly installed inside the fuel tank, a fixing plate is fixed on the mounting supports, along the length direction of the fuel tank, the fixing plate and the X-ray tube are spaced apart; the voltage-doubling rectifying device and the sampling device are respectively fixedly installed on both sides of the fixing plate, and the voltage-doubling rectifying device is located on the side away from the X-ray tube, and the filtering device is installed in the first insulating housing.

[0013] As a further solution of the present utility model: the fuel tank includes a box body and a box cover hermetically covering the box body; the box cover is provided with a plugging hole, the anode of the X-ray tube passes through the plugging hole and immerses into the fuel tank, the cathode of the X-ray tube is fixedly installed on the box cover, and the X-ray tube and the plugging hole are hermetically matched with each other.

[0014] As a further solution of the present utility model: the high-voltage circuit assembly further includes a high-frequency transformer, the high-frequency transformer is arranged outside the fuel tank, a fan for heat dissipation is installed at the high-frequency transformer, and the high-frequency transformer is located on the air flow path of the fan.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The plug-in X-ray source device of the present utility model includes an oil tank filled with insulating oil, an X-ray tube installed on the oil tank, and a high-voltage circuit component that provides power to the X-ray tube. The X-ray tube and the high-voltage circuit component are connected through an electrical connector. The electrical connector includes a matching plug and adapter. Along the height direction of the oil tank, the adapter is electrically connected to the power supply end of the high-voltage circuit component. The X-ray tube has a mounting hole with an opening facing downwards, and the mounting hole is electrically connected to the anode of the X-ray tube. The plug includes a fixed end and a plugging end. The fixed end is detachably fixed to the mounting hole, and the plugging end is used for plugging and connecting to the adapter. Through the plug and the adapter, a fast and reliable connection between the high-voltage circuit component and the X-ray tube can be achieved, thereby realizing the quick disassembly and assembly of the X-ray source device.

[0017] 2. The oil-immersed design places the X-ray tube and its high-voltage circuit component in insulating oil. The insulating oil has good insulation and heat dissipation properties, which can effectively prevent electrical short circuits and overheating, thereby improving the safety and stability of the entire device. In addition, the oil-immersed environment can also play a certain shock-absorbing role for the X-ray tube and extend its service life.

[0018] Other features and advantages of the present utility model will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional structure diagram inside the box body of the X-ray source device in the present utility model.

[0020] Figure 2 It is a schematic structure diagram of the X-ray source device in the present utility model.

[0021] Figure 3 It is a schematic cross-sectional structure diagram of the X-ray source device in the present utility model.

[0022] Figure 4 It is a schematic structure diagram of the banana plug in the present utility model.

[0023] Figure 5 It is a schematic assembly structure diagram of the banana plug and the adapter in the present utility model.

[0024] Figure 6 It is a schematic structure diagram inside the box body in the present utility model.

[0025] Figure 7 It is a schematic cross-sectional structure diagram of the first insulating housing and the second insulating housing in the present utility model.

[0026] Figure 8It is a schematic cross-sectional structural diagram of the second insulating shell in the present utility model.

[0027] Figure 9 It is a schematic diagram of the assembly structure of the oil tank and the breather in the utility model.

[0028] Figure 10 It is a structural schematic diagram of the respirator in the utility model.

[0029] Figure 11 It is a structural schematic diagram of the elastic expansion cap in the utility model.

[0030] Figure 12 It is a structural schematic diagram of the box body in the utility model.

[0031] Figure 13 It is a structural schematic diagram of the box cover in the utility model.

[0032] Figure 14 It is a schematic diagram of the assembly structure of the box body and the high-voltage circuit component in the utility model.

[0033] Figure 15 It is a schematic structural diagram of the front panel in the utility model.

[0034] Figure 16 It is a schematic diagram of the overall structure of the utility model.

[0035] In the figure: 1, protective cover; 11, bottom plate; 111, positioning strip; 12, top plate; 13, front panel; 131, end plate; 1311, mounting plate; 13111, fan; 132, side plate; 1321, convection hole; 14, rear panel; 2, oil tank; 21, box body; 211, pressure relief hole; 212, clamping ring groove; 213, locking screw hole; 214, positioning groove; 22, box cover; 231, plug hole; 232, oil filling hole; 3, mounting support; 31, mounting hole; 32, fixing plate; 4, high-voltage circuit assembly; 41, voltage doubler rectifier; 42, sampling device; 43, Filter device; 44, ignition current limiting device; 45, high-frequency transformer; 5, X-ray tube; 51, anode; 511, mounting screw hole; 52, cathode; 6, banana plug; 61, threaded rod; 62, spring end; 7, adapter; 71, axial hole; 72, crown spring; 8, first insulating shell; 81, first connecting hole; 9, second insulating shell; 91, positioning ear; 92, equalizing ring; 921, second connecting hole; 10, respirator; 101, elastic expansion cap; 1011, cylindrical section; 112, conical section; 113, sealing ring; 114, clamping ring; 102, locking bolt. DETAILED DESCRIPTION

[0036] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the embodiments of the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present utility model, some well-known technical features in the art are not described.

[0037] In order to thoroughly understand the embodiments of the present utility model, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present utility model is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model can also have other embodiments and should not be construed as limited to the embodiments presented here.

[0038] 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 utility model. The singular forms of "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations. The terms "upper", "lower", "front", "rear", "left", "right" and similar expressions used in the present utility model are for illustrative purposes only and not for limitation.

[0039] The ordinal numbers such as "first" and "second" cited in the present utility model are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0040] In this article, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include the allowable errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0041] 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.

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0043] Please refer to Figures 1 to 16 , according to a specific embodiment of the present utility model, the X-ray source device mainly includes a housing, an X-ray tube 5 installed on the housing, and a high-voltage circuit component 4 that provides power to the X-ray tube 5.

[0044] The housing includes an oil tank 2 filled with insulating oil and a protective cover 1 covering the outside of the oil tank 2 for protection. The oil tank 2 includes a box body 21 with an open top and a hollow cuboid shape. The top of the box body 21 is hermetically covered with a box cover 22 through a sealing ring, and the box cover 22 is fixedly installed on the box body 21 through bolts.

[0045] The protective cover 1 includes a bottom plate 11, a top plate 12, a front enclosure plate 13, and a rear enclosure plate 14. The bottom plate 11 is in the shape of a cuboid and is used to be placed on the ground. The oil tank 2 is placed on the bottom plate 11, and a limiting relationship is generated between the two through a positioning component.

[0046] The positioning component includes a positioning strip 111 which is a convex cuboid strip fixedly arranged on the upper surface of the bottom plate 11, and the length of the positioning strip 111 is appropriate. Here, the positioning strip 111 can also be other shaped protrusions, that is, after being clamped up and down, the oil tank 2 will not move on the upper surface of the bottom plate 11. The positioning strip 111 is located in the rear half part of the upper surface of the bottom plate 11. Usually, two or more positioning strips 111 are provided, preferably two arranged side by side along the length direction of the bottom plate 11. A positioning groove with both ends sealed is recessed on the bottom surface of the box body 21 of the oil tank 2, so that when the oil tank 2 is placed on the bottom plate 11 vertically from top to bottom, the positioning strip 111 can be embedded into the positioning groove, thereby realizing the limiting relationship between the oil tank 2 and the bottom plate 11 and preventing the oil tank 2 from moving on the upper surface of the bottom plate 11. At the same time, in order to improve the stability of the limit, in the design, the cross-sectional dimension of the positioning groove is made substantially the same as that of the positioning strip 111, so as to eliminate the fitting gap between the two.

[0047] There is also a limiting relationship between the top plate of the fuel tank 2 and the tank cover 22 through the positioning components. More than two positioning pins are fixedly installed on the upper end surface of the tank cover 22 of the fuel tank 2. At the same time, positioning holes are provided on the top plate 12 so that when the top plate 12 is pressed on the tank cover 22, the positioning pins are inserted into the positioning holes to prevent displacement of the top plate 12 and the tank cover 22 in the direction of the plate surface of the top plate 12. A refillable insulating oil filling hole 232 is also provided on the tank cover 22, and a valve can be installed at the filling hole 232 to control the opening and closing of the filling hole 232.

[0048] After the bottom plate 11, the fuel tank 2, and the top plate 12 are fixedly installed in sequence from bottom to top, then the U-shaped rear enclosure 14 is used to surround the fuel tank 2 from the rear of the fuel tank 2. At the same time, the upper edge of the rear enclosure 14 surrounds a part of the outer edge of the top plate 12, and the lower edge of the rear enclosure 14 surrounds a part of the outer edge of the bottom plate 11. Threaded holes are provided on the outer edges of the top plate 12 and the bottom plate 11, and through holes are provided at the upper and lower ports of the rear enclosure 14. After the rear enclosure 14 is installed in place, bolts are used to pass through the through holes and be threadedly connected to the threaded holes, thereby fixing the top plate 12, the bottom plate 11, and the rear enclosure 14 into one body.

[0049] In order to improve the heat dissipation uniformity of the fuel tank 2 during operation, during design, the distances between three corresponding faces of the installed fuel tank 2 and the rear enclosure 14 can be made approximately the same, thereby forming a sandwich structure to evenly disperse heat in the sandwich cavity.

[0050] The front enclosure 13 is configured as a U-shaped plate formed by enclosing two side plates 132 and one end plate 131, and both the side plates 132 and the end plate 131 are rectangular parallelepiped plates. Through holes are provided at the outer edges of the end plate 131, and through holes are also provided at the upper and lower outer edges of the side plates 132. Threaded holes are provided at the outer edges where the side plates 132 and the end plate 131 are in contact with each other. When assembling the side plates 132 and the end plate 131, after aligning the threaded holes on the side plates 132 with the through holes on the end plate 131, bolts are used to pass through the through holes and form a threaded fit with the threaded holes to fix the side plates 132 and the end plate 131 to each other, thereby forming a U-shaped plate.

[0051] The front enclosure 13 can also be formed by an integral fixed connection method, that is, the two side plates 132 and one end plate 131 are connected together by welding to form an inseparable U-shaped plate.

[0052] The front enclosure 13 is used to wrap the fuel tank 2 from the front of the fuel tank 2 and is fixed to the bottom plate 11 and the top plate 12 by bolts. The front enclosure 13, the rear enclosure 14, the top plate 12, and the bottom plate 11 enclose a containing cavity for accommodating the fuel tank 2 and some electrical appliances.

[0053] An installation space for installing electrical appliances is formed between the front end face of the fuel tank 2 and the front wall panel 13. An inductor 46 and a high-frequency transformer 45 in the high-voltage circuit assembly 4 are installed in this installation space, and the inductor 46 is electrically connected to an external 24V DC power supply. A voltage multiplier rectification device 41, a sampling device 42 for sampling the current frequency, a filtering device 43, and a spark-limiting current device 44 in the high-voltage circuit assembly 4 are installed inside the fuel tank 2.

[0054] Since there are multiple electrical appliances arranged inside the installation space and the heat generation is relatively large. Therefore, a window is opened on the end plate 131, and a detachable mounting plate 1311 is covered and installed on the window. A fan 13111 for blowing air into the installation space for heat dissipation is installed on the mounting plate 1311. At the same time, convection holes 1321 for facilitating the outflow of hot air are also opened on the side plate 132, so as to improve the heat dissipation efficiency. Some wiring connectors are also installed on the mounting plate 1311, including a power supply interface, a signal interface, a communication interface, and a chassis ground wire, for providing power supply, data transmission, etc. for each electrical appliance in the installation space. The ray device in this embodiment communicates with the outside through RS232, and the working parameters of the ray source device are controlled through the control device, so as to control the operation of the ray source device. 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.

[0055] In this utility model, by installing the inductor 46 and the high-frequency transformer 45 inside the protective cover 1 outside the fuel tank 2, and designing and forming an air flow channel and equipping with the fan 13111 and the convection holes 1321, this layout significantly improves the heat dissipation efficiency of the device.

[0056] A support frame is also provided in the installation space in the accommodation cavity. The support frame is supported and connected to the bottom plate 11, and divides the installation space into upper and lower parts in the height direction. The inductor 46 and the high-frequency transformer 45 are installed in the upper space and are arranged side by side at intervals. The front wall panel 13 is provided with a plurality of convection holes 1321 at a position close to the high-frequency transformer 45. The fan 132 and the mounting plate 1311 are located in the lower space, and similarly, a plurality of convection holes 1321 are also provided in the lower part.

[0057] On the one hand, the support frame can play a role in fixing and supporting the components, making full use of the installation space, and the compact structure can also reduce the overall volume of the X-ray source device; on the other hand, it can play the role of a structural framework and improve the structural strength of the X-ray source device.

[0058] The insulating oil can not only achieve electrical isolation, but also help to cool the X-ray tube 5 and part of the high-voltage circuit assembly 4. The external inductor 46 and high-frequency transformer 45 can dissipate heat more quickly through forced air cooling, preventing overheating, thereby extending the service life of the equipment and improving the operating stability.

[0059] The design of the protective cover 1 also provides an additional layer of safety protection, preventing accidental contact or external damage and enhancing the safety of the device. Since some of the high-voltage circuit components 4 are located outside the fuel tank 2, it makes the operation more convenient when maintenance, repair or replacement of these components is required, without the need to completely open the fuel tank 2, thus saving maintenance time and costs. By reasonably arranging and designing the heat dissipation system, this oil-immersed radiation device can manage heat more effectively, reduce performance degradation or failures caused by high temperature, enabling the X-ray source device to operate stably for a long time, and further ensuring the accuracy of the X-ray source output. This is particularly important for application scenarios that require continuous and efficient operation. By adding the design of the fan 13111 and the air flow channel, the device can better adapt to the temperature conditions in different working environments and maintain a better working state whether in high temperature or relatively enclosed spaces, improving the environmental adaptability and flexibility of the device.

[0060] An insulating mounting pillar 3 is installed inside the fuel tank 2. The top end of the mounting pillar 3 is coaxially inserted into the mounting hole 31 opened on the inner end face of the tank cover 22. The top end of the mounting pillar 3 has an interference fit with the mounting hole 31, thereby fixing the mounting pillar 3 on the tank cover 22, and a sealing coil is installed at the fixing position, thus improving the sealing performance of the fuel tank 2. The bottom end of the mounting pillar 3 supports on the first insulating housing 8, further improving the mounting stability of the mounting pillar 3 in the fuel tank 2.

[0061] In this embodiment, the lower end of the mounting pillar is supported and connected to the first insulating housing 8, which can save mounting space and reduce the volume of the fuel tank. In other embodiments of the present invention, the lower end of the mounting pillar can be supported and connected to the bottom of the fuel tank. An insulating fixing plate 32 is also fixedly installed on the mounting pillar 3. A voltage multiplier rectifying device 41 and a sampling device 42 are sequentially installed on the fixing plate 32 from top to bottom. A first insulating housing 8 is installed at the inner bottom of the fuel tank 2, and a filtering device 43 is installed inside the first insulating housing 8. And both ends of the first insulating housing 8 distributed along the width direction of the fuel tank 2 are provided with first connection holes 81 communicating with the inside of the box body 21, for insulating oil to flow in and fill the inside of the first insulating housing 8.

[0062] A second insulating housing 9 is also installed in the fuel tank 2. Both ends of the second insulating housing 9 are open ends, and a flange for fixing connection is installed at the bottom end of the second insulating housing 9. The top end of the second insulating housing 9 is a round hole end. A positioning ear 91 is fixedly installed on the hole wall of the round hole end. An overcurrent gap 93 is left between the positioning ear 91 and the hole wall of the round hole end, and a guiding hole is opened on the positioning ear 91.

[0063] The adapter 7 has a two-stage stepped shape with a smaller upper part and a larger lower part, and an axial hole 71 is coaxially penetrated through it. An external thread is coaxially provided on the outer circumferential surface of the small-diameter end of the adapter 7. An internal threaded hole is coaxially penetrated through the center of the pressure equalizing ring 92. The small-diameter section of the adapter 7 passes through the guiding hole in the middle of the positioning lug from bottom to top and is threadedly connected to the internal threaded hole of the pressure equalizing ring 92, so that the adapter 7, the positioning lug 91, and the pressure equalizing ring 92 are tightly fixed together.

[0064] The anode 51 of the X-ray tube 5 is electrically connected to the conductive socket at the output end of the high-voltage circuit through an electrical connector. The anode 51 is provided with a mounting screw hole 511 with an opening vertically downward. The conductive socket (adapter 7) is located vertically below the anode 51. The conductive socket forms a socket hole (axial hole 71) with an opening vertically upward. The electrical connector is configured as a plug-in electrical connector. The reliable connection between the X-ray tube and the high-voltage circuit can be achieved by plugging, and at the same time, it is also convenient for the disassembly, installation, maintenance, and replacement of the X-ray tube.

[0065] Exemplarily, the plug in the electrical connector can be a banana plug 6. The first end of the banana plug 6 can be detachably connected to the mounting screw hole 511 of the anode 51. For example, in this embodiment, it is a threaded connection. The second end of the banana plug 6 is used for plugging and mating with the socket hole. The second end of the banana plug 6 is usually a spring piece end 62, and its outer surface is designed with outwardly protruding spring pieces. When the second end of the banana plug 6 is inserted into the socket hole, the spring pieces contact the inner wall of the socket hole and are deformed under pressure, and the elastic force generated by the deformation of the spring pieces ensures that the second end of the banana plug 6 can be pressed tightly against the socket hole. Thus, the reliable connection between the electrical connector and the conductive socket can be achieved, and further, the reliable connection between the anode 51 and the anode high-voltage power supply can be ensured.

[0066] The plug in the electrical connector can also be a pin that matches the size of the socket hole, and one end of the pin is fixedly connected to the mounting screw hole 511 of the anode 51. Preferably, in order to improve the reliability of the electrical connection, a crown spring 72 can be provided in the socket hole. Those skilled in the art know that the crown spring 72 includes end bands axially provided at both ends of the crown spring and a plurality of spring pieces connected between the two end bands and spaced apart. The spring pieces have contact portions protruding towards the axis of the crown spring. Each spring piece has a certain elasticity and can be deformed when subjected to pressure and can return to its original state when the pressure disappears.

[0067] When the X-ray tube 5 is installed, the lower end of the pin is plugged and mated with the crown spring 72 in the socket hole, and the body of the crown spring 72 can form an electrical contact with the socket hole. After the pin is inserted, the spring pieces of the crown spring 72 will be elastically deformed under the extrusion of the pin, and the contact portions of the spring pieces can be in close contact with the surface of the pin under the action of the elastic force, forming a reliable electrical connection.

[0068] Of course, like in the illustrated embodiment, a banana plug 6 can be used for the electrical connector, and at the same time, a crown spring 72 can be provided in the socket hole.

[0069] A crown spring 72 that cooperates with the banana plug 6 is coaxially installed in the axial hole 71. The conductive column at the wiring terminal of the spark-limiting current-limiting device 44 installed inside the second insulating housing 9 is inserted into the axial hole 71 from bottom to top and is electrically connected to the crown spring 72. Then, the second insulating housing 9 is placed above the first insulating housing 8, and the spark-limiting current-limiting device 44 is pressed tightly against the upper part of the first insulating housing 8. Then, the second insulating housing 9 is fixed to the first insulating housing 8 by using bolts to pass through the flange. Both the first insulating housing 8 and the second insulating housing 9 are provided with wire passing holes (not shown in the figure) for the wires to pass through. The wires pass through the two wire passing holes to electrically connect the filtering device 43 and the spark-limiting current-limiting device 44. The equalizing ring 92 is provided with a second connection hole 921 that communicates with the current-carrying gap 93 and the inside of the box body 21, so that the insulating oil enters from the second connection hole 921, passes through the current-carrying gap and flows into the inside of the second insulating housing 9 to achieve insulating sealing.

[0070] The present utility model realizes convenient and stable electrical connection of the anode 51 of the X-ray tube 5 by introducing the combination of the banana plug 6 and the crown spring 72. This design is not only novel but also improves the reliability and maintainability of the device. Because the plugging method of the banana plug 6 and the crown spring 72 allows for quick connection and disconnection, reducing the operation complexity and time cost. At the same time, the banana plug 6 is coaxially and elastically inserted into the crown spring 72. This tight contact method ensures efficient transmission of electric energy, reduces energy loss, improves the working efficiency of the X-ray tube 5, and reduces the risk of electrical faults caused by poor contact.

[0071] A wire is used to connect between the high-voltage circuit component 4 and the cathode 52. Based on the flexibility of the wire, the limitation of the position between the high-voltage circuit component 4 and the cathode 52 can be eliminated, providing a better plugging angle for the plugging of the anode 51, so as to quickly and accurately plug the banana plug 6 into the crown spring 72 and improve the working efficiency.

[0072] The oil-immersed design places the X-ray tube 5 and its high-voltage circuit component 4 in insulating oil. The insulating oil has good insulation and heat dissipation properties, which can effectively prevent electrical short circuits and overheating, thereby improving the safety and stability of the entire device. Exemplarily, the insulating oil can be transformer oil. In addition, the oil-immersed environment can also play a certain shock-absorbing role for the X-ray tube 5 and extend its service life. Due to the adoptable pluggable banana plug 6 design, when maintenance or replacement of the X-ray tube 5 or the high-voltage circuit component 4 is required, the connection or disconnection operation can be quickly completed without a complex disassembly process, greatly improving the maintenance efficiency.

[0073] The most direct function of the first insulating housing 8 and the second insulating housing 9 is to provide electrical insulation, preventing the filter device 43 and the arc suppression and current limiting device 44 from making electrical contact with other conductive components in the insulating oil tank 2 during operation, thereby avoiding electrical faults such as short circuits and leakage. This is one of the important measures to ensure the safe and stable operation of the device.

[0074] When the X-ray device is operating, it may generate electromagnetic radiation and electromagnetic interference, which may affect the normal operation of the filter device 43 and the arc suppression and current limiting device 44. The presence of the insulating housing can, to a certain extent, isolate these electromagnetic interferences, protect the equipment from their influence, and ensure the accuracy and reliability of the equipment.

[0075] By sleeving the insulating housing, the filter device 43 and the arc suppression and current limiting device 44 can be effectively isolated from other components in the insulating oil tank 2, reducing potential safety hazards caused by equipment failures or improper maintenance. At the same time, the presence of the insulating housing can also, to a certain extent, improve the shock resistance, vibration resistance, etc. of the equipment, enhancing the overall safety and reliability of the equipment.

[0076] The X-ray tube 5 used in the present utility model is an L-shaped X-ray tube. The anode 51 of the X-ray tube 5 is installed inside the oil tank 2, the cathode 52 of the X-ray tube 5 is installed outside the oil tank 2, and the emission port of the X-ray tube 5 is also installed outside the oil tank 2. At the position where the top plate 12 and the tank cover 22 are fitted, there is an insertion hole 231. The X-ray tube 5 is inserted into the insertion hole 231, the anode 51 extends into the cavity of the oil tank, and a banana plug 6 is installed at the wiring end of the anode 51. The banana plug 6 is electrically connected to the anode of the X-ray tube. The banana plug is used to further achieve the insertion fit with the crown spring 72.

[0077] After the X-ray tube 5 is installed, the X-ray tube 5 is still fixed to the top plate 12 and the tank cover 22 by means of bolts cooperating with the flange on the X-ray tube 5, and a corresponding sealing rubber ring is also installed at the insertion hole 231 to prevent oil leakage from the insertion hole 231.

[0078] At the wiring end of the anode 51, there is a mounting screw hole 511 coaxially opened. The tail end of the banana plug 6 has an external thread coaxially opened to form a threaded rod 61. The banana plug 6 is fixed to the anode 51 by means of threaded connection. Then, when installing the X-ray tube 5, the elastic piece end 62 of the banana plug 6 is inserted into the crown spring 72 to electrically connect the arc suppression and current limiting device 44 and the X-ray tube 5.

[0079] The ignition current-limiting device 44 plays a crucial role in the electrical system. By restricting the magnitude of the current, it protects the equipment from damage, improves the stability and safety of the system, and meets the requirements of different application scenarios. During the process of inserting the banana plug 6 into the crown spring 72 to achieve electrical connection, the firmness and reliability of the connection should be ensured to avoid electrical faults or safety issues caused by poor contact.

[0080] A breather 10 for pressure relief is also arranged in the pressure relief hole 211 opened on the front end face of the fuel tank 2. The breather 10 includes an elastic expansion cap 101. The elastic expansion cap 101 includes a cylindrical section 1011 and a conical section 112 encapsulated at one end of the cylindrical section 1011 and protruding outward. The other end of the cylindrical section 1011 is turned outward to form an annular sealing ring 113. A pressing ring 114 is coaxially fixed on the annular surface of the sealing ring 113 close to the conical section 112. An annular pressing ring 114 groove 212 is coaxially recessed on the outer end face of the pressure relief hole 211. The elastic expansion cap 101 is inserted into the pressure relief hole 211, and the pressing ring 114 is embedded in the positioning groove. At the same time, a locking screw hole 213 is also opened outside the pressing ring 114 groove 212. The pressing ring 114 is coaxially pressed on the sealing ring 113 of the elastic expansion cap 101, and the locking bolt 102 passes through the through hole on the pressing ring 114 and is threadedly connected to the locking screw hole 213, thereby sealing and pressing the elastic expansion cap 101 at the pressure relief hole 211.

[0081] The heat dissipated by the X-ray tube and other electronic devices located inside the fuel tank 2 during operation diffuses into the insulating oil. The temperature rise of the insulating oil will cause volume expansion. At this time, the elastic expansion cap 101 will deform outward under the extrusion of the insulating oil. The deformation of the elastic expansion cap 101 will expand the volume of the sealed space inside the fuel tank 2, effectively reducing the pressure inside the fuel tank 2, preventing the fuel tank 2 from bursting due to excessive internal pressure, preventing the insulating oil from overflowing from each joint, effectively achieving pressure reduction, and thus ensuring the stable operation of the radiation source device.

[0082] The principle of the breather 10 is that the working expansion volume of the breather 10 should be greater than the expansion volume of the insulating oil brought about by the temperature rise during the operation of the X-ray device.

[0083] The protruding surface of the elastic expansion cap 101 contacts the insulating oil inside the fuel tank 2, and the concave part contacts the air. When the oil temperature rises, the insulating oil expands and squeezes out the air in the concave part of the elastic expansion cap 101. When the oil temperature is lower than the temperature of the sealed oil, the insulating oil contracts, and the elastic expansion cap 101 continues to sink inward to ensure that the internal and external pressures are relatively balanced during expansion and contraction.

[0084] The material of the expansion cap 11 is preferably fluororubber. According to a specific embodiment of the present invention, the expansion volume of the insulating oil in the fuel tank 2 at the maximum temperature rise is 14.7 ml. The working expansion volume of the elastic expansion cap 101 can reach 20 ml. Therefore, the elastic expansion cap 101 can meet the usage requirements of the radiation source.

[0085] When the insulating oil in the fuel tank 2 expands in volume and increases in pressure due to the heat generated by the electrical operation inside, the elastic expansion cap 101 can automatically deform outward under the action of the pressure, thereby increasing the internal space of the fuel tank 2 and effectively reducing the pressure. This mechanism requires no external power and has a rapid response, effectively avoiding the risk of damage or oil leakage of the fuel tank 2 due to excessive pressure. The present invention ensures the sealing performance of the elastic expansion cap 101 at the pressure relief hole 211 through the tight combination of the pressing ring 114 and the positioning groove, and the locking screw hole 213 and the locking bolt 102. This multiple-sealing design not only improves the sealing performance of the system but also enhances the overall stability and durability, ensuring the stability of the internal environment of the fuel tank 2.

[0086] The design of the elastic expansion cap 101 makes full use of the elastic characteristics of the material and the tight cooperation of the mechanical structure. The elastic expansion cap 101 is composed of a cylindrical section 1011 and a conical section 112. This structure not only ensures the sealing performance under normal pressure but also can release the pressure through deformation when the pressure increases, achieving a perfect combination of structure and function. When the volume of the insulating oil in the fuel tank 2 gradually increases, the conical section 112 will deform first to release the pressure initially because its contact area with the insulating oil is large and the pressure is concentrated at its top. Then, when the pressure of the insulating oil gradually increases, the cylindrical section 1011 will also gradually deform and be slowly extruded out of the pressure relief hole 211, thereby achieving pressure reduction. Through the segmented pressure reduction, the pressure can change slowly, maintaining a small change range and improving the stability of the device operation.

[0087] It should be noted that the "cylindrical section" and "conical section" described in the foregoing text refer to approximately this shape, not a shape limitation.

[0088] The installation and disassembly process of the breather 10 is relatively simple. The design of the locking bolt 102 enables users to easily inspect and replace the breather 10 components, reducing the maintenance cost and time. At the same time, this design also facilitates rapid intervention in case of an emergency to ensure the safe operation of the equipment.

[0089] The utility model is a micro-focus X-ray device, which is powered by DC24V. Through internal DC-DC high-frequency conversion at all levels, the cathode, grid, filament, and anode high voltage required for the operation of the micro-focus X-ray tube 5 are made equipotential, so as to realize the output of micro-focus X-rays. The micro-focus rays of the micro-focus X-ray device are generated by the micro-focus X-ray tube 5. For the micro-focus X-ray tube 5 to work effectively, anode high voltage, a cathode, a grid suspended (electric potential suspended) above the cathode 52, and a hot filament power supply need to be provided. The hot filament heats the active electrons, and the cathode and grid control the focusing and emission ability of the electron beam. The electron beam is bombarded on the anode target by the anode electric field to generate micro-focus X-rays.

[0090] Among them, the anode power supply uses a series resonance topology to invert the externally input DC24V into a high-frequency AC signal of 60 - 120kHz. After being boosted to AC7kV by the high-frequency transformer 45, it is sent to the voltage multiplier rectifier device 41 for rectification. After passing through the filtering device 43, a DC high voltage of up to 100kV is achieved. After passing through the spark-limiting current-limiting device 44, it is transmitted to the anode 51 through the banana plug 6, and then the cathode 52 is powered on, thereby realizing the excitation of X-rays.

[0091] Inversion process:

[0092] The externally connected DC24V DC voltage passes through the inductor 46 and is then converted into a high-frequency AC signal of 60 - 120kHz by the high-frequency transformer 45. This inversion process is usually achieved by controlling an IGBT (Insulated Gate Bipolar Transistor) or other types of switching devices through PWM (Pulse Width Modulation). The selection of the high-frequency AC signal is to reduce the volume and weight of the transformer, and at the same time improve the efficiency and response speed of the system.

[0093] Boosting process:

[0094] The high-frequency AC signal is then sent to the high-frequency transformer 45 for boosting. The high-frequency transformer 45 uses the principle of electromagnetic induction to convert the AC signal with low voltage and high current into an AC signal with high voltage and low current. In one embodiment of the utility model, the voltage can be boosted to AC7kV. The use of the high-frequency transformer 45 makes the boosting process more compact and efficient.

[0095] Rectification process:

[0096] The boosted high-voltage AC signal is sent to the voltage multiplier rectifier device 41 for rectification. Voltage multiplication rectification is a technology that uses components such as capacitors and diodes to convert an AC voltage into a DC voltage and at the same time realizes voltage multiplication. Through multi-stage voltage multiplication rectification, a higher DC voltage output can be obtained. In one embodiment of the utility model, a DC high voltage of up to 100kV can be achieved.

[0097] Filtering process:

[0098] The rectified DC high-voltage signal may contain certain ripples and noises, so it needs to be filtered by the filtering device 43. The filtering device 43 usually includes components such as capacitors and inductors, which can smooth the DC voltage waveform, reduce the ripple coefficient, and improve the voltage stability.

[0099] Arc-striking current-limiting device 44:

[0100] Before the anode 51 of the X-ray tube 5 is connected, an arc-striking current-limiting device 44 is usually set. The main function of this device is to protect the X-ray tube 5 and the entire power supply system from current shocks and damages caused by arc striking, that is, local discharge phenomena on the anode target. When an arc strike occurs, the current-limiting device can quickly limit the magnitude of the current to prevent excessive current from damaging the equipment.

[0101] Connection of the anode 51 of the X-ray tube 5:

[0102] The stable DC high voltage after the above processing is finally sent to the anode 51 of the X-ray tube 5. Under the action of the high-voltage electric field formed between the anode 51 and the cathode 52, the electrons released by the cathode 52 are accelerated and strike the anode target, thereby generating X-rays.

[0103] In summary, the anode power supply design of the micro-focus X-ray device of the present utility model is a complex and precise systematic project, which involves multiple technical links such as inversion, boosting, rectification, filtering, and current-limiting protection. Through the coordinated action of these links, the conversion from low-voltage DC input to high-voltage DC output is realized, and the stable operation and efficient work of the X-ray tube 5 are ensured.

[0104] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. Plug-in X-ray source device, comprising an oil tank (2) filled with insulating oil, an X-ray tube (5) installed on the oil tank (2), and a high-voltage circuit assembly (4) for supplying power to the X-ray tube (5), characterized in that, It further includes an electrical connector, which includes a matching plug and an adapter (7); along the height direction of the fuel tank (2), the adapter (7) is electrically connected to the power supply end of the high-voltage circuit assembly (4), the X-ray tube (5) has a mounting hole with an opening facing downwards, and the mounting hole is conductively connected to the anode of the X-ray tube (5); the plug includes a fixed end and a plugging end, the fixed end is detachably fixedly connected to the mounting hole, and the plugging end is used for plugging and connecting to the adapter (7).

2. The plug-in X-ray source device according to claim 1, wherein The adapter (7) has an axial hole (71) for plugging and mating with the plugging end, a crown spring (72) is coaxially fixed in the axial hole (71) of the adapter (7), and the crown spring (72) is electrically connected to the high-voltage circuit assembly (4); and / or the plug is provided with outwardly protruding elastic pieces on the outer surface of the plugging end.

3. The plug-in X-ray source device according to claim 1, wherein The plug is coaxially provided with an external thread at the fixed end to form a threaded rod (61); the mounting hole is a mounting screw hole (511), and the threaded rod (61) is coaxially threadedly connected in the mounting screw hole (511).

4. The plug-in X-ray source device according to any one of claims 1 to 3, characterized in that, A second insulating housing (9) is fixedly installed in the fuel tank (2), and the adapter (7) is fixedly installed in the second insulating housing (9); along the height direction, the second insulating housing (9) is located below the mounting hole, the top of the second insulating housing (9) has an opening, and when the plug and the adapter (7) are plugged and mated, the connection position of the plug and the adapter (7) is located within the top opening of the second insulating housing (9).

5. The plug-in X-ray source device according to claim 4, characterized in that, The adapter (7) is of a two-stage stepped shape with a smaller upper part and a larger lower part, and an external thread is coaxially provided on the outer side of its small-diameter section; a positioning lug (91) is fixed at the opening of the top of the second insulating housing (9), a guiding hole is provided on the positioning lug (91), the small-diameter section of the adapter (7) coaxially passes through the guiding hole and is threadedly connected to a voltage equalizing ring (92) provided with an internal threaded hole, so that the adapter (7), the positioning lug (91) and the voltage equalizing ring (92) are fixedly connected into one body.

6. The plug-in X-ray source device according to claim 5, characterized in that, The high-voltage circuit assembly (4) includes a sparking current-limiting device (44), the sparking current-limiting device (44) is installed in the internal cavity of the second insulating housing (9) and is conductively connected to the adapter (7); the voltage equalizing ring (92) is provided with a second connection hole (921) communicating the internal cavity of the second insulating housing (9) and the internal part of the box body (21), and each second connection hole (921) is evenly distributed on the ring surface of the voltage equalizing ring (92) along the circumferential direction of the voltage equalizing ring (92).

7. The plug-in X-ray source device according to claim 6, wherein The high-voltage circuit assembly (4) further includes a voltage multiplier rectifying device (41), a sampling device (42) and a filtering device (43) installed in the fuel tank (2), and a high-frequency transformer (45) installed outside the fuel tank (2) and used for externally connecting a power supply and boosting the externally connected power supply; the high-frequency transformer (45), the voltage multiplier rectifying device (41), the sampling device (42), the filtering device (43), and the sparking current-limiting device (44) are electrically connected in sequence, and the high-frequency transformer (45) is also electrically connected to the cathode (52) of the X-ray tube (5) through a wire.

8. The plug-in X-ray source device according to claim 7, wherein, A mounting support (3) is fixedly installed inside the oil tank (2), a fixing plate (32) is fixed on the mounting support (3), and the fixing plate (32) and the X-ray tube (5) are spaced apart and distributed along the length direction of the oil tank (2); a voltage doubler rectifier device (41) and a sampling device (42) are respectively fixedly installed on both sides of the fixing plate (32), and the voltage doubler rectifier device is located on a side away from the X-ray tube (5), and a filter device (43) is installed in a first insulating shell (8).

9. The plug-in X-ray source device according to any one of claims 1 to 3, characterized in that, The oil tank (2) comprises a box body (21) and a box cover (22) sealed and joined to the box body (21); a plug hole (231) is provided on the box cover (22); an anode (51) of an X-ray tube (5) passes through the plug hole (231) and is immersed in the oil tank (2); a cathode (52) of the X-ray tube (5) is fixedly mounted on the box cover (22); and the X-ray tube (5) and the plug hole (231) are sealed and matched with each other.

10. The plug-in X-ray source device according to any one of claims 1 to 3, characterized in that, The high-voltage circuit assembly (4) further comprises a high-frequency transformer (45), which is arranged outside the oil tank (2). A fan (13111) for heat dissipation is installed at the high-frequency transformer (45), and the high-frequency transformer (45) is located on the airflow path of the fan (13111).

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