X-ray source device with efficient heat dissipation

Abstract

The utility model relates to the technical field of ray devices, in particular to an X-ray source device with efficient heat dissipation. Comprising an oil tank filled with insulating oil, an X-ray tube and a high-voltage circuit assembly, and the X-ray tube and a part of the high-voltage circuit assembly are installed in the oil tank; the other part of the high-voltage circuit assembly is installed in a protection cover outside the oil tank, and an air flow channel used for heat dissipation is formed in the protection cover. A fan and a convection hole matched with the fan to form an air flow channel are mounted on the protective cover. According to the utility model, a part of the high-voltage circuit assembly is arranged in the protective cover outside the oil tank, the air flow channel is designed and formed, and the fan and the convection holes are arranged, so that the insulating oil is beneficial to cooling the X-ray tube and a part of the high-voltage circuit assembly in the oil tank, and the high-voltage circuit assembly outside the oil tank can dissipate heat more quickly in a forced air cooling manner; and the heat dissipation efficiency of the device is improved. Therefore, the service life of the equipment can be prolonged, and the operation stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ray devices, in particular to an X-ray source device with efficient heat dissipation. Background Art

[0002] As a ray source device, an X-ray tube has been widely used in various different types of machines. Such as in high-precision X-ray fluorescence analyzers, X-ray thickness gauges, X-ray film thickness gauges, X-ray non-destructive detectors and other equipment.

[0003] Patent CN204046909U discloses a combined high-frequency high-voltage X-ray head. The X-ray head includes an oil tank cover and an oil tank body. An internal insulating frame fixedly connected to the oil tank cover is placed inside the oil tank body. The internal insulating frame is divided into several spaces by setting insulating partitions, and a positive terminal voltage-doubling rectifying and filtering unit, a negative terminal voltage-doubling rectifying and filtering unit, a filament transformer, a high-frequency high-voltage transformer and an X-ray tube are respectively fixedly installed. A wiring board unit and a through-core capacitor are also provided on the oil tank cover. The internal insulating frame and the insulating partitions are both made of 10-mm thick PP plates. The above patent can effectively solve the problem that the head is prone to spark when outputting a high-power X-ray source, and can stably output a high-power X-ray. Since all the high-voltage circuit components that supply power to the X-ray tube in the above X-ray head are placed in the oil tank, a large amount of heat will be generated in the oil tank. Although the transformer oil is used for heat conduction and dissipation, the heat dissipation rate of the transformer oil is too low, which easily causes the temperature of the transformer oil in the oil tank to be too high. The too high temperature will seriously affect the working stability of the X-ray tube.

[0004] Therefore, it is crucial to reduce the working temperature of the X-ray tube. Content of the Utility Model

[0005] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides an X-ray source device with efficient heat dissipation. The utility model can effectively reduce the working temperature of the X-ray tube, thereby improving the working stability of the X-ray tube.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] An X-ray source device with efficient heat dissipation, including an oil tank filled with insulating oil, an X-ray tube and a part of high-voltage circuit components are installed in the oil tank; another part of high-voltage circuit components are installed in a protective cover outside the oil tank, and a wind flow channel for heat dissipation is formed in the protective cover; a fan is installed on the protective cover, and convection holes for cooperating with the fan to form the wind flow channel.

[0008] As a further solution of the present utility model: The protective cover includes a bottom plate, a top plate, a front enclosure plate, and a rear enclosure plate that are connected to each other; the front enclosure plate and the rear enclosure plate are opposed to each other to form a cavity with upper and lower openings; the bottom plate and the top plate respectively cover both ends of the cavity to enclose a receiving cavity;

[0009] Convection holes are provided on the front enclosure plate and / or the rear enclosure plate.

[0010] As a further solution of the present utility model: The fuel tank is installed in the receiving cavity, and a positioning strip protruding from the plate surface is fixedly installed on the upper plate surface of the bottom plate, and a positioning groove for the positioning strip to be inserted into is provided at the bottom of the fuel tank.

[0011] As a further solution of the present utility model: The front enclosure plate includes an end plate portion and side plate portions located on both sides of the end plate, a window is provided on the end plate, and a fan is fixedly installed on the window; convection holes are provided on at least one of the side plates.

[0012] As a further solution of the present utility model: The rear enclosure plate wraps around the outside of the fuel tank from the rear forward, and a sandwich cavity structure is formed between the side surfaces of the fuel tank and the rear enclosure plate that are close to each other.

[0013] As a further solution of the present utility model: The top plate presses down on the top of the fuel tank from top to bottom, and at least two positioning pins are fixedly installed on the upper end surface of the fuel tank cover, and pin holes for the positioning pins to be inserted into to fixedly connect the top plate to the cover are provided on the top plate.

[0014] As a further solution of the present utility model: The high-voltage circuit assembly includes a voltage multiplier rectification device, a sampling device, a filtering device, and a spark current-limiting device installed in the fuel tank;

[0015] The high-voltage circuit assembly includes a high-frequency transformer installed outside the fuel tank for connecting to an external power supply and boosting the external power supply;

[0016] The high-frequency transformer, the voltage multiplier rectification device, the sampling device, the filtering device, the spark current-limiting device, and the anode of the X-ray tube 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.

[0017] As a further solution of the present utility model: Installation struts are fixedly installed inside the fuel tank, and both the voltage multiplier rectification device and the sampling device are fixedly installed on the installation struts.

[0018] As a further solution of the present utility model: The fuel tank includes a box body and a cover that is hermetically covered on the box body; a plug hole is provided on the cover, the anode of the X-ray tube passes through the plug hole and immerses into the fuel tank, the cathode of the X-ray tube is fixedly installed on the cover, and the X-ray tube and the plug hole are hermetically matched with each other.

[0019] As a further solution of the present utility model: a wire passing hole for power supply connection to the high-frequency transformer and the voltage multiplier rectification device is provided on the box body.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. In the present utility model, a part of the high-voltage circuit components are installed in the protective cover outside the fuel tank, and a wind flow channel is designed and equipped with a fan and convection holes. This layout significantly improves the heat dissipation efficiency of the device. The insulating oil helps to cool the X-ray tube and part of the high-voltage circuit components, and the external high-voltage circuit components and the fuel tank can also achieve rapid heat dissipation through forced air cooling, preventing overheating, thereby prolonging the service life of the equipment and improving the operation stability;

[0022] In addition, by arranging the transformer and inductor in the protective cover outside the fuel tank, the structure is compact, and while ensuring heat dissipation, the overall volume of the radiation source can be effectively reduced.

[0023] 2. By placing part of the high-voltage circuit components in the protective cover outside the fuel tank, the number of high-voltage components inside the fuel tank is reduced, which is convenient for heat dissipation. At the same time, the design of the protective cover also provides an additional safety protection layer, preventing the equipment from being exposed, improving the service life of the equipment, and having higher safety.

[0024] 3. Since part of the high-voltage circuit components are located outside the fuel tank, it is more convenient to operate when maintenance, repair or replacement of these components is required, without having to completely open the fuel tank, thus saving maintenance time and cost.

[0025] 4. Through reasonable layout and design of the heat dissipation system, the oil-immersed radiation device can manage heat more effectively, reduce performance degradation or failures caused by high temperature, and ensure the stability and high precision of the equipment during long-term operation. This is particularly important for application scenarios that require continuous and efficient operation.

[0026] 5. By adding the design of a fan and a wind flow channel, the device can better adapt to the temperature conditions in different working environments. Whether in a high-temperature or relatively enclosed space, it can maintain a better working state, improving the environmental adaptability and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present utility model;

[0028] Figure 2 is the structural schematic diagram of the front enclosure panel in the present utility model;

[0029] Figure 3 is the assembly structural schematic diagram of the box body and the high-voltage circuit components in the present utility model;

[0030] Figure 4 It is a schematic cross-sectional structure diagram of the X-ray source device inside the box body in the present utility model;

[0031] Figure 5 It is a schematic cross-sectional structure diagram of the X-ray source device in the present utility model;

[0032] Figure 6 It is a schematic structure diagram of the banana plug in the present utility model;

[0033] Figure 7 It is a schematic assembly structure diagram of the banana plug and the adapter in the present utility model;

[0034] Figure 8 It is a schematic structure diagram of the inside of the box body in the present utility model;

[0035] Figure 9 It is a schematic cross-sectional structure diagram of the first insulating housing and the second insulating housing in the present utility model;

[0036] Figure 10 It is a schematic cross-sectional structure diagram of the second insulating housing in the present utility model;

[0037] Figure 11 It is a schematic structure diagram of the box cover in the present utility model;

[0038] Figure 12 It is a schematic assembly structure diagram of the fuel tank and the breather in the present utility model.

[0039] Figure 13 It is a schematic structure diagram of the breather in the present utility model; and

[0040] Figure 14 It is a schematic structure diagram of the elastic expansion cap in the present utility model.

[0041] In the figure: 1. Protective cover; 11. Bottom plate; 111. Positioning strip; 12. Top plate; 13. Front enclosure panel; 131. End plate; 1311. Mounting plate; 13111. Fan; 132. Side plate; 1321. Convection hole; 14. Rear enclosure panel; 2. Fuel tank; 21. Tank body; 211. Pressure relief hole; 212. Compression ring groove; 214. Positioning groove; 22. Tank cover; 231. Insertion hole; 232. Oil filling hole; 3. Mounting support; 31. Mounting hole; 32. Fixed plate; 4. High-voltage circuit assembly; 41. Voltage multiplier rectifier device; 42. Sampling device; 43. Filtering device; 44. Spark current-limiting device; 45. High-frequency transformer; 46. Inductor; 5. X-ray tube; 51. Anode; 511. Mounting screw hole; 52. Cathode; 6. Banana plug; 61. Threaded rod; 62. Elastic piece end; 7. Adapter; 71. Axial hole; 72. Crown spring; 8. First insulating housing; 81. First connection hole; 9. Second insulating housing; 91. Positioning lug; 92. Voltage equalizing ring; 93. Overcurrent gap; 921. Second connection hole; 10. Breather; 101. Elastic expansion cap; 1011. Cylindrical section; 112. Conical section; 113. Sealing ring; 114. Compression ring. Detailed implementation mode

[0042] In the following description, a large number of 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.

[0043] 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 specific 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.

[0044] 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 "comprising" and / or "including" 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 are not limitations.

[0045] The ordinal numbers such as "first" and "second" cited in the present utility model are merely 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.

[0046] 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.

[0047] 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.

[0048] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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.

[0049] Please refer to Figures 1 to 14 , 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 for the X-ray tube 5.

[0050] See Figures 1 to 4 and Figure 8 , the housing includes an oil tank 2 filled with insulating oil and a protective cover 1 wrapped outside 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 sealed and 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. See Figure 8, the box body 21 is made of insulating material, and the outer surface of the box body 21 is covered with a metal material layer, and the metal layer plays a role of isolation and protection. The box cover 22 is made of conductive material.

[0051] Reference Figure 1 , 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 fuel tank 2 is placed on the bottom plate 11, and a limiting relationship is generated between the two through a positioning component.

[0052] In the illustrated example, the positioning component includes a positioning strip 111 which is a cuboid strip protruding upward and fixedly arranged on the upper plate surface of the bottom plate 11, and the length of the positioning strip 111 is appropriate. Here, the positioning strip 111 can also be a protrusion of other shapes, that is, after the upper and lower clamping, the fuel tank 2 will not move on the upper plate surface of the bottom plate 11. The positioning strip 111 is located in the rear half part of the upper plate surface of the bottom plate 11. Usually, two or more positioning strips 111 are provided, and preferably two are 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 fuel tank 2, so that when the fuel tank 2 is placed on the bottom plate 11 from top to bottom in the vertical direction, the positioning strip 111 can be embedded into the positioning groove, so as to realize the limiting relationship between the fuel tank 2 and the bottom plate 11 and prevent the fuel tank 2 from moving on the upper plate 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 to be approximately the same as that of the positioning strip 111, so as to eliminate the fitting gap between the two.

[0053] A limiting relationship is also generated between the top plate of the fuel tank 2 and the box cover 22 through a positioning component. Two or more positioning pins are fixedly installed on the upper end surface of the box cover 22 of the fuel tank 2. At the same time, positioning holes are opened on the top plate 12, so that when the top plate 12 is pressed on the box cover 22, the positioning pins can be inserted into the positioning holes to prevent the top plate 12 and the box cover 22 from generating displacement along the plate surface direction of the top plate 12. A fill hole 232 (see Figure 11 ) for filling insulating oil that can be opened and closed is also provided on the box cover 22. A valve can be installed at the fill hole 232 to control the opening and closing of the fill hole 232.

[0054] After the bottom plate 11, the fuel tank 2 and the top plate 12 are sequentially installed and fixed from bottom to top, then the U-shaped rear enclosure plate 14 is used to surround the fuel tank 2 from the back of the fuel tank 2. At the same time, the upper edge of the rear enclosure plate 14 surrounds a part of the outer edge of the top plate 12, and the lower edge of the rear enclosure plate 14 surrounds a part of the outer edge of the bottom plate 11. Threaded holes are opened on the outer edges of the top plate 12 and the bottom plate 11, and through holes are opened at the upper port and the lower port of the rear enclosure plate 14. After the rear enclosure plate 14 is installed in place, bolts are used to pass through the through holes and be threadedly connected with the threaded holes, so as to fixedly connect the top plate 12, the bottom plate 11 and the rear enclosure plate 14 into one body.

[0055] In order to improve the heat dissipation uniformity of the fuel tank 2 during operation, during the design, the distances between the three corresponding surfaces of the installed fuel tank 2 and the three corresponding surfaces of the rear enclosure panel 14 can be made approximately the same, thereby forming a sandwich structure to evenly disperse the heat in the sandwich cavity.

[0056] The front enclosure panel 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.

[0057] The front enclosure panel 13 can also be formed by an integral connection method, that is, two side plates 132 and one end plate 131 are connected together by welding to form an inseparable U-shaped plate.

[0058] The front enclosure panel 13 is used to wrap the fuel tank 2 from the front of the fuel tank 2, and the front enclosure panel 13 is fixed to the bottom plate 11 and the top plate 12 by bolts. The front enclosure panel 13, the rear enclosure panel 14, the top plate 12 and the bottom plate 11 enclose to form an accommodation cavity for accommodating the fuel tank 2 and some electronic devices.

[0059] An installation space for installing electronic devices is formed between the front end face of the fuel tank 2 and the front enclosure 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 externally connected 24V DC power supply. The voltage multiplier rectifier device 41, the sampling device 42 for sampling the current frequency, the filtering device 43 and the spark-limiting current-limiting device 44 in the high-voltage circuit assembly 4 are installed inside the fuel tank 2.

[0060] Since there are multiple electronic devices arranged inside the installation space and the heat generation is large. Therefore, a window is opened on the end plate 131, a detachable mounting plate 1311 is covered and installed on the window, a fan 13111 for blowing air to dissipate heat into the installation space is installed on the mounting plate 1311, and at the same time, convection holes 1321 for facilitating the outflow of hot air are also opened on the side plates 132 (see Figure 2) to improve the heat dissipation efficiency. Some wiring connectors are also installed on the mounting plate 1311, including a power interface, a signal interface, a communication interface, and a chassis ground wire, which are used to provide power, data transmission, etc. for each electronic device in the installation space. The ray device in this embodiment communicates with the outside through RS232, and the working parameters of the X-ray source device are controlled through the control device, so as to control the operation of the X-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.

[0061] In the present utility model, the inductor 46 and the high-frequency transformer 45 are installed in the protective cover 1 outside the fuel tank 2, and a wind flow channel is designed and formed, and a fan 13111 and convection holes 1321 are equipped, and this layout significantly improves the heat dissipation efficiency of the device.

[0062] Reference Figure 3 , a support frame is also provided in the installation space of the accommodating cavity. The support frame is supported and connected to the bottom plate 11, and the installation space is divided 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. See Figure 1 and Figure 2 , a plurality of convection holes 1321 are provided on the front panel 13 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.

[0063] Figure 3 In the shown embodiment, on the one hand, the support frame can play a role in fixing and supporting the devices, make full use of the installation space, and the compact structure can further reduce the overall volume of the X-ray source; on the other hand, it can play a role as a structural framework and improve the structural strength of the X-ray source device.

[0064] The insulating oil can not only achieve electrical isolation, but also help to cool the X-ray tube 5 and some high-voltage circuit components 4. By means of forced air cooling, the fuel tank 2 and the inductor 46 and the high-frequency transformer 45 outside the fuel tank 2 can be cooled more quickly to prevent overheating, thereby extending the service life of the equipment and improving the operation stability. Exemplarily, the insulating oil is transformer oil.

[0065] 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.

[0066] 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 (see Figure 8 ), and the top end of the mounting pillar 3 is in snap-fit with the mounting hole 31 to fix the mounting pillar 3 and the tank cover 22. In this embodiment, the bottom end of the mounting pillar 3 is supported on the first insulating housing 8. The top end of the mounting pillar 3 can be in interference fit with the mounting hole 31.

[0067] In this embodiment, the lower end of the mounting pillar 3 is supported and connected to the first insulating housing 8, which can save mounting space and reduce the volume of the fuel tank 2. In other embodiments not shown in the present utility model, the lower end of the mounting pillar can be supported and connected to the bottom of the fuel tank.

[0068] See Figure 3 , 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 (see Figure 4 and Figure 8 ), and a filtering device 43 is installed inside the first insulating housing 8. And the first insulating housing 8 is respectively provided with first connection holes 81 communicating with the inside of the box body 21 at both ends along the width direction of the fuel tank 2 (see Figure 4 and Figure 9 ) for insulating oil to flow in and fill the inside of the first insulating housing 8.

[0069] A second insulating housing 9 is also installed in the fuel tank 2. Specifically, in the present embodiment, the second insulating housing 9 extends along the height direction of the fuel tank 2, and both the upper and lower ends are open ends. A flange for fixedly connecting the first insulating housing 8 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, and positioning lugs 91 are fixedly installed on the hole wall of the round hole end. An overcurrent gap 93 is left between the positioning lugs 91 and the hole wall of the round hole end (see Figure 4 ), and a guiding hole is provided on the positioning lugs 91.

[0070] An axis hole 71 is coaxially penetrated through a adapter 7 with a two-stage stepped shape that is smaller at the top and larger at the bottom, and external threads are coaxially provided on the outer cylindrical surface of the small-diameter end of the adapter 7. An internal threaded hole is coaxially penetrated through the center of the voltage equalizing ring 92. The small-diameter section of the adapter 7 passes upward through the guiding hole in the middle of the positioning lugs and is threadedly connected to the internal threaded hole of the voltage equalizing ring 92, so that the adapter 7, the positioning lugs 91, and the voltage equalizing ring 92 are tightly fixedly connected together.

[0071] Refer to Figures 4 to 10 , 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 assembly 4 (i.e., the output end of the spark-limiting current-limiting device 44) 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 (axis hole 71), and the opening of the socket hole is vertically upward. The electrical connector is configured as a plug-in electrical connector. The reliable connection between the X-ray tube 5 and the high-voltage circuit assembly 4 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 5.

[0072] Exemplarily, 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 the present 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. 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.

[0073] The electrical connector can also be a pin that matches the size of the socket hole. One end of the pin and the mounting screw hole 511 of the anode 51 are fixedly connected to each other. 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 disposed at both ends of the crown spring along the axial direction 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 direction of the crown spring. Each spring piece has a certain elasticity and can be deformed when subjected to pressure and return to its original shape when the pressure disappears.

[0074] When the X-ray tube 5 is installed, the lower end of the pin is inserted and fitted with the crown spring 72 in the socket hole. 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 to form a reliable electrical connection.

[0075] Of course, like in the illustrated embodiment, the electrical connector can adopt a banana plug 6, and at the same time, a crown spring 72 is provided in the socket hole.

[0076] Reference Figure 7 In the illustrated embodiment, a crown spring 72 that cooperates with the banana plug 6 is coaxially installed in the axial hole 71. Combining Figure 4 , the conductive column at the wiring terminal of the spark suppression and 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 as a whole and the first insulating housing 8 are assembled.

[0077] In this embodiment, the bottom plate of the second insulating housing 9 simultaneously constitutes a part of the top plate of the first insulating housing 8 (see Figure 4 ), which facilitates the assembly of the electronic devices inside the insulating housing, saves space, and reduces the volume and weight of the X-ray source device. The first insulating housing 8 and the second insulating housing 9 can be two independent components.

[0078] The spark suppression and current limiting device 44 is pressed tightly above the first insulating housing 8, and then the second insulating housing 9 is fixed to the first insulating housing 8 by using bolts to pass through the flange (refer to Figure 9 , Figure 10 ). Through holes for wires to pass through (not shown in the figure) are provided on both the first insulating housing 8 and the second insulating housing 9. The wires pass through the two through holes to electrically connect the filtering device 43 and the spark suppression and current limiting device 44.

[0079] Continue to refer to Figure 4 , a current-carrying gap 93 is formed through on the voltage equalizing ring 92 (see Figure 4) and the second connection hole 921 inside the box body 21, so that the insulating oil enters from the second connection hole 921, passes through the overcurrent gap 93 and flows into the inside of the second insulating housing 9 to immerse the spark-limiting current device 44.

[0080] In this embodiment, by introducing the combination of the banana plug 6 and the crown spring 72, a convenient and stable electrical connection of the anode 51 of the X-ray tube 5 is achieved. 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, and this tight contact method ensures the 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.

[0081] A wire is used to connect the high-voltage circuit component 4 and the cathode 52. Based on the flexibility of the wire, the position limitation 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 facilitate the quick and accurate plugging of the banana plug 6 into the crown spring 72 and improve the working efficiency.

[0082] 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. 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. Specifically, in combination with the closing connection method of the box body 21 and the box cover 22 of the fuel tank 2, when the box body 21 and the box cover 22 are separated up and down, the X-ray tube 5 and the high-voltage circuit component 4 can be separated, facilitating the inspection and replacement of the faulty X-ray tube.

[0083] The most direct function of the first insulating housing 8 and the second insulating housing 9 is to provide electrical insulation, preventing the filtering device 43 and the spark-limiting current device 44 from making electrical contact with other conductive components in the fuel tank 2 during operation, thereby avoiding the occurrence of electrical faults such as short circuits and electric leakage. This is one of the important measures to ensure the safe and stable operation of the device.

[0084] When the X-ray device is working, it may generate electromagnetic radiation and electromagnetic interference, and these interferences may affect the normal operation of the filtering device 43 and the spark-limiting current device 44. The existence of the insulating housing can isolate these electromagnetic interferences to a certain extent and protect the device from their influence.

[0085] By sleeving an insulating housing, the filtering device 43 and the spark suppression and current limiting device 44 can be effectively isolated from other components in the fuel 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 improve the shock resistance, vibration resistance, etc. of the equipment to a certain extent, enhancing the overall safety and reliability of the equipment.

[0086] See Figure 4 , Figure 5 and Figure 8 , 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 fuel tank 2, the cathode 52 of the X-ray tube 5 is installed outside the fuel tank 2, and the emission port of the X-ray tube 5 is also installed outside the fuel tank 2.

[0087] See Figure 4 , Figure 8 and Figure 11 , at the position where the top plate 12 and the tank cover 22 are fitted, a plugging hole 231 is provided. The X-ray tube 5 is inserted into the plugging hole 231, the anode 51 extends into the cavity of the fuel tank, and a banana plug 6 is installed at the wiring terminal 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 plugging and matching with the crown spring 72.

[0088] 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. Correspondingly, a sealing rubber ring is installed at the plugging hole 231 to prevent oil leakage from the plugging hole 231.

[0089] Refer to Figures 5 to 7 , a mounting screw hole 511 is coaxially provided at the wiring terminal of the anode 51, and an external thread is coaxially provided at the tail end of the banana plug 6 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 spark suppression and current limiting device 44 and the X-ray tube 5.

[0090] See Figure 3 and Figure 8 , a breather 10 is also hermetically provided on the box body 21 of the fuel tank 2, which can absorb the expanded volume of the insulating oil in the fuel tank 2 after being heated through elastic deformation.

[0091] See Figures 12 to 14 , a breather 10 for pressure relief is also arranged in the pressure relief hole 211 provided 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 (see Figure 14)。The other end of the cylindrical section 1011 is turned outwards to form an annular sealing ring 113. A pressing ring 114 is coaxially fixed on the ring surface of the sealing ring 113 close to the conical section 112. An annular pressing ring 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, the fuel tank 2 is also provided with a locking screw hole outside the pressing ring groove 212. The pressing ring 114 is coaxially pressed on the sealing ring 113 of the elastic expansion cap 101, and the locking bolt 12 passes through the through hole on the pressing ring 114 and is threadedly connected with the locking screw hole, thereby sealingly pressing the elastic expansion cap 101 at the pressure relief hole 211.

[0092] The heat generated by the 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 outwards 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, so as to prevent the fuel tank 2 from being burst due to excessive internal pressure, prevent the insulating oil from overflowing from each joint, effectively achieve pressure reduction, and then ensure the stable operation of the ray source device. This mechanism does not require external power and has a rapid response. And the utility model 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 and the locking bolt 12. 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.

[0093] 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 by the temperature rise during the operation of the X-ray source device.

[0094] 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 sealing oil, the insulating oil shrinks, and the elastic expansion cap 101 continues to sink inwards to ensure the relative balance of the internal and external pressures during expansion and contraction.

[0095] The working expansion volume of the elastic expansion cap 101 is about 20 ml. The material of the elastic expansion cap 101 is preferably fluororubber with good oil resistance. Through long-term testing, it can be known that this elastic expansion cap 101 can work for a long time under a pressure difference of 0.2 Mpa.

[0096] According to a specific embodiment of the present utility model, the calculation method of the expanded volume of the transformer oil in the fuel tank 2 is as follows: the expansion coefficient of No. 25 transformer oil is 0.0007, the volume of the transformer oil in the fuel tank 2 is 1.4L, and the maximum temperature rise of the internal insulating oil of the X-ray tube 5 is 15°C. Then the expanded volume is 1.4×1000×0.0007×15 = 14.7ml. The working expansion volume of the elastic expansion cap 101 can reach 20ml. Therefore, the elastic expansion cap 101 can meet the usage requirements of the radiation source.

[0097] See Figure 14 , the design of the elastic expansion cap 101 makes full use of the elastic characteristics of the material and the close 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 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 because of its larger contact area with the insulating oil and the pressure concentrated on its top, thus releasing the pressure initially. 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 slow change of pressure can be realized, maintaining a small change range and improving the stability of the device operation.

[0098] 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.

[0099] The installation and disassembly process of the breather 10 is relatively simple. The design of the locking bolt 12 enables users to conveniently check and replace the components of the breather 10, reducing the maintenance cost and time. At the same time, this design is also convenient for rapid intervention in case of emergency to ensure the safe operation of the equipment.

[0100] The present utility model is a micro-focus X-ray device, 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 equalized, for realizing 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. The effective operation of the micro-focus X-ray tube 5 requires providing anode high voltage, cathode 52, and a grid and filament power supply suspended (potential suspension) above the cathode. 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.

[0101] Among them, the anode power supply adopts 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 sparking current-limiting device 44, it is transmitted to the anode 51 through the banana plug 6, and then the cathode 52 is powered on to realize the excitation of X-rays.

[0102] Inversion process:

[0103] 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 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.

[0104] Boosting process:

[0105] The high-frequency AC signal is then sent to the high-frequency transformer 45 for boosting. The high-frequency transformer 45 utilizes 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 an embodiment of the present 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.

[0106] Rectification process:

[0107] 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 the 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 an embodiment of the present utility model, a DC high voltage of up to 100kV can be achieved.

[0108] Filtering process:

[0109] 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.

[0110] Sparking current-limiting device 44:

[0111] Before the anode 51 of the X-ray tube 5 is connected, a spark 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 surges and damage caused by sparking, that is, local discharge phenomena on the anode target. When sparking occurs, the current-limiting device can quickly limit the magnitude of the current and prevent excessive current from damaging the equipment.

[0112] Connection of the anode 51 of the X-ray tube 5:

[0113] The stabilized DC high voltage after the above treatment is finally fed into 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.

[0114] 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 achieved, and the stable operation and efficient work of the X-ray tube 5 are ensured.

[0115] 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 of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An X-ray source device with efficient heat dissipation, characterized in that, It includes an oil tank (2) filled with insulating oil. The X-ray tube (5) and a part of the high-voltage circuit components (4) are both installed in the oil tank (2); another part of the high-voltage circuit components (4) is installed in a protective cover (1) outside the oil tank (2), and an air flow channel for heat dissipation is formed in the protective cover (1); a fan (13111) is installed on the protective cover (1), and a convection hole (1321) that cooperates with the fan (13111) to form the air flow channel.

2. The X-ray source device with high heat dissipation according to claim 1, characterized in that The protective cover (1) includes a bottom plate (11), a top plate (12), a front enclosure plate (13) and a rear enclosure plate (14) connected to each other; the front enclosure plate (13) and the rear enclosure plate (14) are opposed to each other to form a cavity with upper and lower openings; the bottom plate (11) and the top plate (12) respectively cover both ends of the cavity to enclose a receiving cavity. The convection hole (1321) is provided on the front enclosure plate (13) and / or the rear enclosure plate (14).

3. The X-ray source device with high heat dissipation according to claim 2, characterized in that, The front enclosure plate (13) includes an end plate (131) and side plates (132) located on both sides of the end plate (131). A window is opened on the end plate (131), and the fan (13111) is fixedly installed on the window; the convection hole (1321) is provided on at least one of the side plates (132).

4. The X-ray source device with efficient heat dissipation according to claim 2, wherein, The rear enclosure plate (14) wraps around the outside of the oil tank (2) from the rear to the front, and a sandwich structure is formed between the side surfaces of the oil tank (2) and the rear enclosure plate (14) that are close to each other.

5. The high-efficiency heat-dissipating X-ray source device according to claim 2, wherein, The oil tank (2) is installed in the receiving cavity, and a positioning strip (111) protruding from the plate surface is fixedly installed on the upper plate surface of the bottom plate (11), and a positioning groove for the positioning strip (111) to be inserted is opened at the bottom of the oil tank (2).

6. The X-ray source device with high-efficiency heat dissipation according to claim 2, wherein The top plate (12) presses down on the top of the oil tank (2) from top to bottom, and at least two positioning pins are fixedly installed on the upper end surface of the tank cover (22) of the oil tank (2), and pin holes for the positioning pins to be inserted to fix the top plate (12) to the tank cover (22) are opened on the top plate (12).

7. The X-ray source device with high-efficiency heat dissipation according to any one of claims 1 to 6, characterized in that, The high-voltage circuit components (4) include a voltage multiplier rectifier device (41), a sampling device (42), a filtering device (43) and a spark current-limiting device (44) installed in the oil tank (2); The high-voltage circuit components (4) include a high-frequency transformer (45) installed outside the oil tank (2) for connecting to an external power supply and boosting the external power supply; The high-frequency transformer (45), the voltage multiplier rectifier device (41), the sampling device (42), the filtering device (43), the spark current-limiting device (44), and the anode (51) of the X-ray tube (5) 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 X-ray source device with high heat dissipation according to claim 7, characterized in that Installation struts (3) are fixedly installed inside the oil tank (2), and both the voltage multiplier rectifier device (41) and the sampling device (42) are fixedly installed on the installation struts (3).

9. The X-ray source device with efficient heat dissipation according to any one of claims 1 to 6, characterized in that The fuel tank (2) includes a tank body (21) and a tank cover (22) hermetically closed on the tank body (21); a plugging hole (231) is formed in the tank cover (22), the anode (51) of the X-ray tube (5) passes through the plugging hole (231) and immerses into the fuel tank (2), the cathode (52) of the X-ray tube (5) is fixedly installed on the tank cover (22), and the X-ray tube (5) and the plugging hole (231) are hermetically matched with each other.

10. The X-ray source device with high-efficiency heat dissipation according to claim 9, characterized in that, A threading hole for power supply connection of the high-frequency transformer (45) and the voltage multiplier rectifier device (41) is formed in the tank body (21).

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