X-ray tube with protection

Abstract

The utility model discloses a kind of X-ray tubes with protection device, X-ray tube with protection device includes tube cover, tube core subassembly and expansion and contraction subassembly.The inside of tube cover has first inner cavity, one end of expansion and contraction subassembly is communicated with outside through one end of tube cover, expansion and contraction subassembly has second inner cavity, second inner cavity is communicated with outside, the volume of second inner cavity changes along with the volume change of insulating oil.The outer cavity that expansion and contraction subassembly and tube cover form intercommunication, expansion and contraction subassembly itself has second inner cavity, and second inner cavity and outer cavity are filled with gas communicated with outside.When insulating oil expands due to temperature rise, gas is compressed, the volume of second inner cavity of expansion and contraction subassembly is reduced, first inner cavity is increased in turn, and then provide space for the expansion of insulating oil, thereby the pressure of insulating oil is released, effectively reduce the risk of X-ray tube is squeezed crack, improve the safety and reliability of X-ray tube.

Description

Technical Field

[0001] This utility model relates to the field of X-ray equipment technology, and in particular to an X-ray tube with a protective device. Background Technology

[0002] As a key component of medical imaging diagnostic equipment, the structure and working principle of the X-ray tube are crucial to the equipment's performance. It mainly consists of a tube body, a cathode assembly, and an anode assembly. The cathode assembly contains a filament, and the anode assembly includes an anode bearing and an anode target disk. The tube body is filled with insulating oil. During operation, the filament is heated by electricity. Under the high voltage between the anode and cathode, free electrons move directionally from the cathode to the anode. The anode target disk rotates at high speed and is bombarded by the electron beam, thus generating X-rays.

[0003] However, significant energy issues exist during X-ray tube operation. Only about 1% of the high-speed electron kinetic energy is converted into X-rays, while the remaining approximately 99% is dissipated as heat, especially in the focal trajectory region of the anode target disk, where temperatures can reach 2600°C-2700°C. This heat dissipates into the insulating oil, causing its temperature to gradually rise. This temperature rise in the insulating oil can trigger a series of serious problems. According to the principle of thermal expansion and contraction, the volume of the insulating oil will gradually expand, which, if not effectively controlled, may cause arcing, leakage, and other malfunctions. Simultaneously, the pressure inside the X-ray tube will rise sharply in a short period, posing a risk of rupturing the X-ray tube and seriously affecting the safety and reliability of the equipment. Therefore, there is an urgent need for an X-ray tube sheath protection device capable of maintaining pressure balance inside the X-ray tube to prevent the expanding insulating oil from rupturing the X-ray tube. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an X-ray tube with a protective device that can maintain the pressure inside the X-ray tube in a horizontal position to prevent the expanding insulating oil from cracking the X-ray tube.

[0005] An X-ray tube with a protective device according to an embodiment of the present invention includes:

[0006] A sleeve, wherein the sleeve has a first inner cavity filled with insulating oil, and the side wall of the sleeve is provided with a ray window;

[0007] A core assembly disposed within the sleeve and located in the first inner cavity, the core assembly being immersed in the insulating oil, the core assembly being used to generate X-rays, the X-rays being able to exit from the X-ray window; and

[0008] An expansion and contraction assembly is disposed in the sleeve and located at one end of the core assembly. One end of the expansion and contraction assembly is connected to the outside through one end of the sleeve. The expansion and contraction assembly has a second inner cavity, and there is an outer cavity between the expansion and contraction assembly and the sleeve. The outer cavity and the second inner cavity are interconnected. Both the second inner cavity and the outer cavity are filled with gas. The second inner cavity is connected to the outside. The volume of the second inner cavity changes with the volume of the insulating oil.

[0009] The X-ray tube with a protective device according to the present invention has at least the following beneficial effects: The expansion and contraction assembly of the X-ray tube forms an interconnected outer cavity with the tube sleeve. The expansion and contraction assembly itself has a second inner cavity, and both the second inner cavity and the outer cavity are filled with gas communicating with the outside. When the insulating oil expands in volume due to temperature rise, the gas is compressed, and the volume of the second inner cavity of the expansion and contraction assembly is compressed accordingly, while the first inner cavity increases in size. This provides space for the expansion of the insulating oil, thereby easing the pressure of the insulating oil and preventing malfunctions such as arcing and leakage caused by a rapid increase in pressure. This effectively reduces the risk of the X-ray tube being crushed and improves the safety and reliability of the X-ray tube.

[0010] According to some embodiments of the present invention, the expansion and contraction assembly includes a sealing plate and an expansion and contraction shell. The interior of the expansion and contraction shell forms a second inner cavity. One end of the expansion and contraction shell is tightly connected to the inner wall of one end of the sleeve. The outer wall of the other end of the expansion and contraction shell abuts against one side wall of the sealing plate. The shape of the sealing plate matches the cross-sectional shape of the sleeve. The periphery of the sealing plate is tightly connected to the inner wall of the sleeve. The expansion and contraction shell is expandable and contractible. The sealing plate can slide along the length direction of the sleeve. The sealing plate is used to isolate the outer cavity and the first inner cavity.

[0011] According to some embodiments of the present invention, the expansion and contraction shell includes a spherical segment, the spherical segment is spherically shaped, the spherical segment abuts against one side of the sealing plate, and the spherical segment is elastic.

[0012] According to some embodiments of the present invention, the expansion and contraction shell includes a waveform segment, the waveform segment is waveform-shaped, the waveform segment is tightly connected to the inner wall of one end of the sleeve, the waveform segment is expandable and contractible, the waveform segment is connected to the spherical segment, and the waveform segment and the spherical segment cooperate to define the second inner cavity.

[0013] According to some embodiments of the present invention, the peaks and troughs of the waveform segment are both rounded, and the peaks and troughs of the waveform segment are arranged alternately and evenly.

[0014] According to some embodiments of this utility model, the expansion and contraction shell is made of rubber material.

[0015] According to some embodiments of the present invention, a protective layer is provided on the outer wall of the expansion and contraction shell, and the protective layer is used to isolate the insulating oil.

[0016] According to some embodiments of the present invention, the second inner cavity is connected to the outside through a connecting valve. The connecting valve is located on the outside of one end of the sleeve, and a barometer is provided on the connecting valve. The barometer is used to detect the air pressure value in the second inner cavity.

[0017] According to some embodiments of the present invention, the outer wall of the sleeve is provided with a connection hole, which is used for the cathode and anode of the core assembly to be electrically connected to the outside.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of an X-ray tube with a protective device according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of a half-section of an X-ray tube with a protective device is shown.

[0022] Figure 3 for Figure 2 A partially enlarged schematic diagram of an X-ray tube with protective devices is shown.

[0023] Icon labels:

[0024] Tube sleeve 10; First inner cavity 11; X-ray window 12; Connecting hole 13;

[0025] Core assembly 20;

[0026] Expansion / contraction assembly 30; second inner cavity 31; outer cavity 32; sealing plate 33; expansion / contraction shell 34; spherical section 341; wave section 342; connecting valve 35; barometer 36. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 3 The X-ray tube with a protective device according to an embodiment of the present invention includes a tube sleeve 10, a core assembly 20, and an expansion and contraction assembly 30. The sleeve 10 has a first inner cavity 11 filled with insulating oil. X-ray windows 12 are provided on the side wall of the sleeve 10. The core assembly 20 is disposed in the sleeve 10 and located in the first inner cavity 11. The core assembly 20 is immersed in the insulating oil and is used to generate X-rays, which can be emitted from the X-ray windows 12. The expansion and contraction assembly 30 is disposed in the sleeve 10 and located at one end of the core assembly 20. One end of the expansion and contraction assembly 30 is connected to the outside through one end of the sleeve 10. The expansion and contraction assembly 30 has a second inner cavity 31. There is an outer cavity 32 between the expansion and contraction assembly 30 and the sleeve 10. The outer cavity 32 is connected to the second inner cavity 31. Both the second inner cavity 31 and the outer cavity 32 are filled with gas. The second inner cavity 31 is connected to the outside. The volume of the second inner cavity 31 changes with the volume of the insulating oil.

[0031] Specifically, during the operation of an X-ray tube, due to its low energy conversion rate, a large amount of energy is dissipated into the insulating oil as heat, causing the oil temperature to rise and its volume to expand. Traditional X-ray tubes cannot effectively handle this situation, potentially leading to arcing, leakage, and even the risk of the X-ray tube cracking. In contrast, the expansion and contraction assembly 30 of this X-ray tube forms an interconnected outer cavity 32 with the tube sleeve 10. The expansion and contraction assembly 30 itself has a second inner cavity 31, and both the second inner cavity 31 and the outer cavity 32 are filled with gas connected to the outside. When the insulating oil expands due to temperature rise, the gas is compressed, causing the volume of the second inner cavity 31 of the expansion and contraction assembly 30 to decrease, while the volume of the first inner cavity 11 increases. This provides space for the expansion of the insulating oil, thus mitigating the pressure and preventing arcing, leakage, and other malfunctions caused by a rapid increase in pressure. This effectively reduces the risk of the X-ray tube cracking and improves its safety and reliability. Furthermore, this design requires no complex mechanical structure or additional power source, is simple in structure, low in cost, and easy to implement and maintain, demonstrating good practicality and economy.

[0032] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific implementation of this X-ray tube with a protective device. Figures 1 to 3 As shown, this X-ray tube mainly includes a sleeve 10, a core assembly 20, and an expansion / contraction assembly 30. The sleeve 10 is cylindrical in shape and has a first inner cavity 11 filled with insulating oil. A radiation window 12 is provided on the side wall of the sleeve 10. This radiation window 12 is made of a special material that effectively prevents insulating oil leakage while ensuring smooth X-ray emission. The core assembly 20 is disposed inside the sleeve 10 and located in the first inner cavity 11, completely immersed in the insulating oil. The core assembly 20 includes a cathode assembly and an anode assembly. The cathode assembly includes a filament, and the anode assembly includes an anode bearing and an anode target disk. When the X-ray tube is working, the filament is heated by electricity, applying a high voltage between the cathode and anode. Ionized electrons outside the filament move directionally from the cathode to the anode under the influence of the strong electric field. The anode bearing drives the anode target disk to rotate at high speed, bearing the bombardment of the electron beam, thereby generating bremsstrahlung and characteristic radiation. The resulting X-rays can be emitted from the radiation window 12. An expansion and contraction assembly 30 is disposed within the sleeve 10 and located at one end of the core assembly 20. One end of the expansion and contraction assembly 30 communicates with the outside through one end of the sleeve 10, and it has a second inner cavity 31. An outer cavity 32 is formed between the expansion and contraction assembly 30 and the sleeve 10, and the outer cavity 32 is interconnected with the second inner cavity 31. Both the second inner cavity 31 and the outer cavity 32 are filled with gas, and the second inner cavity 31 is connected to the outside. The expansion and contraction assembly 30 is made of an elastic material, such as rubber or silicone, and has good elasticity and sealing properties. When the X-ray tube is working, the temperature of the insulating oil rises and its volume expands, the gas is compressed, the volume of the second inner cavity 31 of the expansion and contraction assembly 30 decreases accordingly, and the volume of the first inner cavity 11 increases accordingly, providing space for the expansion of the insulating oil, thereby relieving the pressure of the insulating oil. When the X-ray tube stops working, the temperature of the insulating oil drops and its volume shrinks. The expansion and contraction component 30 returns to its original shape under its own elasticity, the volume of the second inner cavity 31 increases, and the gas re-enters the outer cavity 32 and the second inner cavity 31. The volumes of the outer cavity 32 and the second inner cavity 31 increase, and the volume of the first inner cavity 11 decreases, thereby ensuring the stability of the internal pressure of the X-ray tube.

[0033] Therefore, it is understood that the X-ray tube with a protective device according to the present invention has at least the following beneficial effects: the expansion and contraction assembly 30 of the X-ray tube and the sleeve 10 form an interconnected outer cavity 32. The expansion and contraction assembly 30 itself has a second inner cavity 31, and both the second inner cavity 31 and the outer cavity 32 are filled with gas that communicates with the outside. When the insulating oil expands in volume due to the increase in temperature, the gas is compressed, and the volume of the second inner cavity 31 of the expansion and contraction assembly 30 is compressed accordingly. The first inner cavity 11 increases accordingly, thereby providing space for the expansion of the insulating oil, thus easing the pressure of the insulating oil, avoiding malfunctions such as arcing and leakage caused by a rapid increase in pressure, effectively reducing the risk of the X-ray tube being crushed, and improving the safety and reliability of the X-ray tube.

[0034] Reference Figures 2 to 3 In some embodiments of this utility model, the expansion and contraction assembly 30 includes a sealing plate 33 and an expansion and contraction shell 34. The interior of the expansion and contraction shell 34 forms a second inner cavity 31. One end of the expansion and contraction shell 34 is tightly connected to the inner wall of one end of the sleeve 10. The outer wall of the other end of the expansion and contraction shell 34 abuts against one side wall of the sealing plate 33. The shape of the sealing plate 33 matches the cross-sectional shape of the sleeve 10. The periphery of the sealing plate 33 is tightly connected to the inner wall of the sleeve 10. The expansion and contraction shell 34 is expandable and retractable. The sealing plate 33 can slide along the length direction of the sleeve 10. The sealing plate 33 is used to isolate the outer cavity 32 and the first inner cavity 11.

[0035] Specifically, in the X-ray tube with protective device in this embodiment, the expansion and contraction assembly 30 is composed of a sealing plate 33 and an expansion and contraction shell 34. The expansion and contraction shell 34 is made of a material with good elasticity and extensibility, such as highly elastic rubber, and forms a second inner cavity 31 inside. One end of the expansion and contraction shell 34 is tightly connected to the inner wall of one end of the sleeve 10 through a sealing connection process to ensure a good seal at the connection and prevent leakage of insulating oil or gas. The outer wall of the other end of the expansion and contraction shell 34 is tightly abutted against one side wall of the sealing plate 33. This abutment method can ensure a tight contact between the two and reduce the penetration of gas or liquid. The shape of the sealing plate 33 matches the cross-sectional shape of the sleeve 10, and is usually circular. Its periphery is tightly connected to the inner wall of the sleeve 10. The connection method can be achieved by setting a sealing ring around the sealing plate 33, and achieving a tight connection through the interference fit between the sealing ring and the inner wall of the sleeve 10. This effectively isolates the outer cavity 32 and the first inner cavity 11, preventing the insulating oil in the first inner cavity 11 from entering the outer cavity 32, and also preventing the gas in the outer cavity 32 from directly contacting the insulating oil in the first inner cavity 11, thus ensuring the stability of the internal environment of the X-ray tube. The expansion and contraction shell 34 has the characteristic of being expandable and contractible. When the X-ray tube is working, the insulating oil expands in volume due to the increase in temperature. The insulating oil applies pressure to the expansion and contraction shell 34, and the expansion and contraction shell 34 undergoes elastic deformation under pressure. The volume of the second inner cavity 31 shrinks accordingly, and the volume of the first inner cavity 11 increases accordingly, providing space for the expansion of the insulating oil. At the same time, the sealing plate 33 can slide along the length of the sleeve 10 under the push of the expansion and contraction shell 34. This sliding process is smooth and stable, and will not cause additional damage to the sleeve 10 or the expansion and contraction assembly 30. When the X-ray tube stops working, the insulating oil temperature drops and its volume shrinks. The expansion and contraction shell 34 gradually returns to its original shape under its own elasticity and the pressure of the gas. The volume of the second inner cavity 31 increases, while the volume of the first inner cavity 11 decreases accordingly. The sealing plate 33 also slides in the opposite direction under the influence of the expansion and contraction shell 34, returning to its initial position, thus maintaining the pressure balance inside the X-ray tube. Through the expansion and contraction of the shell 34 and the sliding of the sealing plate 33, this X-ray tube can effectively alleviate the pressure caused by temperature changes in the insulating oil, ensuring the normal operation of the equipment.

[0036] Furthermore, referring to Figures 2 to 3In some embodiments of this utility model, the expansion and contraction shell 34 includes a spherical segment 341. The spherical segment 341 is spherically shaped and abuts against one side of the sealing plate 33. The spherical segment 341 is elastic. In this embodiment of the X-ray tube with a protective device, the expansion and contraction shell 34 includes the key spherical segment 341 structure. The spherical segment 341 is generally spherically shaped and is made of a highly elastic material, such as silicone rubber. This material not only has good elasticity and can deform to a large extent under stress, but also can quickly return to its original shape after deformation, ensuring the reliability and durability of the expansion and contraction shell 34. One side of the spherical segment 341 is in close contact with one side of the sealing plate 33. When the X-ray tube is working, the insulating oil expands in volume due to the increase in temperature, and the sealing plate 33 applies pressure to the expansion and contraction shell 34. At this time, the spherical segment 341, due to its elastic properties, can quickly respond to the pressure change and undergo elastic deformation. Due to the special spherical structure of the spherical segment 341, it has uniform expansion and contraction capabilities in all directions, which can evenly distribute pressure, allowing the expansion and contraction shell 34 as a whole to stably reduce the volume of the second inner cavity 31, providing sufficient space for the expansion of the insulating oil.

[0037] Furthermore, referring to Figures 2 to 3 In some embodiments of this utility model, the expansion and contraction shell 34 includes a waveform segment 342, which is waveform-shaped and tightly connected to the inner wall of one end of the sleeve 10. The waveform segment 342 is telescopic and connectable to a spherical segment 341. The waveform segment 342 and the spherical segment 341 cooperate to form a second inner cavity 31.

[0038] In the X-ray tube with protective device of this embodiment, the expansion and contraction shell 34 includes a spherical segment 341 and a corrugated segment 342. The corrugated segment 342 is shaped like a corrugated tube and is made of a metal sheet or a high-polymer elastic material with good flexibility and elasticity, such as stainless steel sheet or polytetrafluoroethylene (PTFE). This material selection allows the corrugated segment 342 to flexibly expand and contract under stress, while maintaining good structural stability during repeated deformation. One end of the corrugated segment 342 is tightly connected to the inner wall of one end of the sleeve 10 through a special sealing connection process. The connection method can be welding (for the metal corrugated segment 342) or high-strength bonding (for the high-polymer elastic material corrugated segment 342), ensuring good sealing performance at the connection point, preventing leakage of insulating oil or gas, and ensuring the stability of the internal environment of the X-ray tube. The corrugated segment 342 is directly connected to the spherical segment 341, and the two are tightly bonded together through an integral molding process (such as injection molding or metal stamping) or a reliable mechanical connection method (such as threaded connection with sealant). At the connection point, the waveform segment 342 and the spherical segment 341 cooperate to jointly define the second inner cavity 31 of the expansion and contraction shell 34.

[0039] When the X-ray tube is operating, the insulating oil expands in volume due to the increase in temperature, exerting pressure on the expansion and contraction shell 34. At this time, the waveform segment 342, thanks to its waveform tube structure, can quickly respond to pressure changes and expand and contract along the length of the sleeve 10. The expansion and contraction of the waveform segment 342 effectively buffers the pressure changes caused by the expansion of the insulating oil, and works in conjunction with the elastic deformation of the spherical segment 341 to compress the volume of the second inner cavity 31, providing sufficient space for the expansion of the insulating oil. When the X-ray tube stops operating, the temperature of the insulating oil drops and its volume shrinks, the waveform segment 342 gradually returns to its original shape under the action of its own elasticity and gas pressure, causing the spherical segment 341 to reset as well, thus increasing the volume of the second inner cavity 31. This design combining the waveform segment 342 and the spherical segment 341 fully utilizes the advantages of both, allowing the expansion and contraction shell 34 to adapt to changes in the volume of the insulating oil more flexibly and efficiently, further improving the stability and reliability of the internal pressure regulation of the X-ray tube, and ensuring the safe and stable operation of the X-ray tube under various working conditions.

[0040] In some embodiments of this invention, the peaks and troughs of the waveform segment 342 are rounded, and the peaks and troughs of the waveform segment 342 are arranged alternately and evenly. On one hand, the rounded shape effectively reduces stress concentration. During the operation of the X-ray tube, the waveform segment 342 repeatedly expands and contracts with changes in the volume of the insulating oil, and the peaks and troughs are areas of concentrated stress. The rounded shape makes the stress distribution more uniform, preventing cracks or damage to the waveform segment 342 due to stress concentration, thereby improving the mechanical strength and fatigue life of the waveform segment 342 and ensuring the long-term stable operation of the expansion and contraction assembly 30. On the other hand, the peaks and troughs of the waveform segment 342 are arranged alternately and evenly. During the design and manufacturing process of the waveform segment 342, the size and shape of the mold are precisely controlled to ensure that the spacing between each peak and trough is equal, forming a uniform waveform structure. The evenly distributed peaks and troughs enable the waveform segment 342 to maintain stable motion characteristics during expansion and contraction.

[0041] In some embodiments of this utility model, a protective layer (not shown in the figure) is provided on the outer wall of the expansion and contraction shell 34. The protective layer is used to isolate the insulating oil. The main function of the protective layer on the outer wall of the expansion and contraction shell 34 is to isolate the insulating oil and prevent the insulating oil from causing adverse effects on the expansion and contraction shell 34. The protective layer can be made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical stability and hardly reacts with any chemical substances. It can effectively resist the corrosion of insulating oil and avoid problems such as swelling and corrosion of the expansion and contraction shell 34 due to long-term contact with insulating oil, thereby extending the service life of the expansion and contraction shell 34 and ensuring its stable performance.

[0042] Reference Figures 1 to 3 In some embodiments of this utility model, the second inner cavity 31 is connected to the outside through a connecting valve 35. The connecting valve 35 is located on the outside of one end of the sleeve 10, and a barometer 36 is provided on the connecting valve 35. The barometer 36 is used to detect the air pressure value in the second inner cavity 31.

[0043] In this embodiment of the X-ray tube with a protective device, the second inner cavity 31 is connected to the outside via a connecting valve 35. The connecting valve 35 is a stainless steel ball valve, which possesses excellent corrosion resistance and mechanical strength, enabling it to withstand the complex working environment that the X-ray tube may encounter and ensuring long-term stable operation. The connecting valve 35 is fixedly installed on the outside of one end of the sleeve 10 by welding, ensuring a firm and well-sealed connection between the connecting valve 35 and the sleeve 10, preventing gas or liquid leakage. The connecting valve 35 ensures smooth gas exchange between the second inner cavity 31 and the outside. When the connecting valve 35 is open, the second inner cavity 31 is connected to the outside atmosphere. When changes in the volume of the insulating oil inside the X-ray tube cause abnormal increases or decreases in the gas pressure of the second inner cavity 31, the connecting valve 35 can be used to adjust the pressure balance between the second inner cavity 31 and the outside. For example, when the air pressure in the second inner cavity 31 is too high, the connecting valve 35 is opened to allow some gas to escape to the outside, thus reducing the air pressure in the second inner cavity 31. When the air pressure in the second inner cavity 31 is too low, the connecting valve 35 can be opened appropriately to allow outside gas to enter the second inner cavity 31, thus increasing the air pressure. A barometer 36 is installed on the connecting valve 35. The barometer 36 uses a high-precision digital pressure sensor, which has advantages such as high measurement accuracy, fast response speed, and good stability. The barometer 36 is installed on the connecting valve 35 by a threaded connection, and a sealing gasket is provided at the connection to ensure the airtightness of the connection and prevent gas leakage from affecting the accuracy of the air pressure measurement. The main function of the barometer 36 is to detect the air pressure value in the second inner cavity 31 in real time, and then calculate the pressure in the first inner cavity 11. During the operation of the X-ray tube, the barometer 36 continuously monitors the air pressure in the second inner cavity 31 and displays the detected air pressure value in digital form on the display screen of the barometer 36. Operators can observe the values ​​on the display screen to understand the air pressure status of the second inner cavity 31 and thus infer the pressure status of the first inner cavity 11. When the air pressure value exceeds the set safety range, the barometer 36 can also be equipped with an alarm function, which will remind the operator to take appropriate measures by emitting sound or flashing light, such as adjusting the opening of the connecting valve 35 to adjust the air pressure of the second inner cavity 31, thereby ensuring the stability of the internal pressure of the X-ray tube and ensuring the safe operation of the equipment.

[0044] Reference Figures 1 to 2In some embodiments of this utility model, the outer wall of the sleeve 10 is provided with connection holes 13, which are used for electrical connection between the cathode and anode of the die assembly 20 and the external environment. In this embodiment of the X-ray tube with a protective device, the outer wall of the sleeve 10 is specifically provided with connection holes 13, which play an important role in realizing the electrical connection between the cathode and anode of the die assembly 20 and the external environment. For the electrical connection between the cathode of the die assembly 20 and the external environment, the cathode lead is connected to the connection hole 13 through a specially designed conductive connector. Similarly, for the electrical connection between the anode of the die assembly 20 and the external environment, the anode lead is also connected to another connection hole 13 through a corresponding conductive component. By providing these connection holes 13 on the outer wall of the sleeve 10 and adopting a reasonable connection method, the cathode and anode of the die assembly 20 can be conveniently and stably connected to the external power supply and other circuits, providing the necessary electrical support for the normal operation of the X-ray tube, ensuring that the X-ray tube can stably generate X-rays, and meeting the needs of various application scenarios.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An X-ray tube with a protective device, characterized in that, include: A sleeve, wherein the sleeve has a first inner cavity filled with insulating oil, and the side wall of the sleeve is provided with a ray window; A core assembly is disposed in the sleeve and located in the first inner cavity. The core assembly is immersed in the insulating oil and is used to generate X-rays, which can be emitted from the X-ray window. as well as An expansion and contraction assembly is disposed in the sleeve and located at one end of the core assembly. One end of the expansion and contraction assembly is connected to the outside through one end of the sleeve. The expansion and contraction assembly has a second inner cavity, and there is an outer cavity between the expansion and contraction assembly and the sleeve. The outer cavity and the second inner cavity are interconnected. Both the second inner cavity and the outer cavity are filled with gas. The second inner cavity is connected to the outside. The volume of the second inner cavity changes with the volume of the insulating oil.

2. The X-ray tube with a protective device according to claim 1, characterized in that, The expansion and contraction assembly includes a sealing plate and an expansion and contraction shell. The interior of the expansion and contraction shell forms the second inner cavity. One end of the expansion and contraction shell is tightly connected to the inner wall of one end of the sleeve. The outer wall of the other end of the expansion and contraction shell abuts against one side wall of the sealing plate. The shape of the sealing plate matches the cross-sectional shape of the sleeve. The periphery of the sealing plate is tightly connected to the inner wall of the sleeve. The expansion and contraction shell is expandable and contractible. The sealing plate can slide along the length of the sleeve. The sealing plate is used to isolate the outer cavity from the first inner cavity.

3. The X-ray tube with a protective device according to claim 2, characterized in that, The expansion and contraction shell includes a spherical segment, which is spherically shaped and abuts against one side of the sealing plate. The spherical segment is elastic.

4. The X-ray tube with a protective device according to claim 3, characterized in that, The expansion and contraction shell includes a waveform segment, which is waveform-shaped and tightly connected to the inner wall of one end of the sleeve. The waveform segment is expandable and contractible, and is connected to the spherical segment. The waveform segment and the spherical segment cooperate to define the second inner cavity.

5. The X-ray tube with a protective device according to claim 4, characterized in that, The peaks and troughs of the waveform segment are all rounded, and the peaks and troughs of the waveform segment are arranged alternately and evenly.

6. The X-ray tube with a protective device according to claim 2, characterized in that, The expansion and contraction shell is made of rubber.

7. The X-ray tube with a protective device according to claim 2, characterized in that, The outer wall of the expansion and contraction shell is provided with a protective layer, which is used to isolate the insulating oil.

8. The X-ray tube with a protective device according to claim 1, characterized in that, The second inner cavity is connected to the outside through a connecting valve. The connecting valve is located on the outside of one end of the sleeve. A barometer is installed on the connecting valve to detect the air pressure value in the second inner cavity.

9. The X-ray tube with a protective device according to claim 1, characterized in that, The outer wall of the sleeve is provided with a connection hole, which is used for the cathode and anode of the core assembly to be electrically connected to the outside.

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