Pressure balance structure for radiation source oil tank

Abstract

The invention provides a pressure balancing structure for a radiation source oil tank, and relates to the technical field of medical imaging equipment, the pressure balancing structure comprises an oil tank main body and a balancing bag body, at least one radiation generating mechanism is arranged in the oil tank main body, the oil tank main body is filled with an insulating medium, and the balancing bag body is arranged in the oil tank main body and is communicated with an inner cavity of the oil tank main body; wherein the balance capsule body is deformed in response to the volume change of the insulating medium caused by the temperature change, so as to maintain the pressure balance inside and outside the oil tank main body. By arranging the breathing bag in the oil tank, the volume expansion and shrinkage of the insulating oil caused by temperature change can be automatically responded, so that the internal pressure of the oil tank is always kept in dynamic balance with the external atmospheric pressure, and the problem of pressure fluctuation caused by thermal expansion and cold contraction of the oil in the oil tank is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical imaging equipment technology, and more specifically to a pressure balancing structure for a radiation source oil tank. Background Technology

[0002] In X-ray diagnostic equipment, the X-ray source, as a core component, is typically encapsulated in a sealed tank filled with an insulating medium (such as insulating oil). This insulating medium serves the dual function of high-voltage insulation and heat dissipation, ensuring stable operation of the X-ray generating mechanism under high-voltage conditions and timely heat dissipation. However, when the X-ray source is operating, the tube generates a large amount of heat, causing the temperature of the insulating medium inside the tank to rise rapidly and its volume to expand, leading to a sharp increase in internal pressure. When the equipment is shut down and cooled, the temperature of the insulating medium decreases and its volume to shrink, resulting in a negative pressure inside the tank.

[0003] Such periodic and drastic pressure fluctuations can repeatedly stress the sealing structure of the oil tank. Over time, this can easily lead to fatigue aging and sealing failure of the sealing rings, causing leakage of the insulating medium. At the same time, external moisture, dust, and other impurities may enter the oil tank, contaminating the insulating medium and affecting the insulation performance and service life of the radiation source. In addition, for dual-tube integrated oil tanks with compact internal space and high heat generation, traditional pressure balancing solutions (such as simple vents and simple expansion bladders) have obvious defects: vents directly lead to oil-gas contact, accelerating the oxidation and deterioration of the insulating medium; simple expansion bladders have insufficient pressure regulation precision and are prone to interference with internal high-voltage components, making it difficult to achieve reliable and long-term stable pressure balance within a limited space.

[0004] Therefore, there is an urgent need for a pressure balance structure that is compact, responsive, has good isolation, and is adaptable to multi-tube layouts, in order to solve the technical problems existing in the prior art, such as pressure fluctuations affecting sealing reliability, easy contamination of insulating media, and poor spatial adaptability. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a pressure balancing structure for a radiation source tank. By setting a flexible balancing bladder that is physically isolated from the insulating medium inside the tank, the adaptive deformation of the bladder responds to the volume change of the insulating medium, thereby achieving dynamic balance of pressure inside and outside the tank. It also features a compact structure, good isolation, and strong adaptability.

[0006] According to one aspect of the present invention, a pressure balancing structure for a radiation source tank includes: The tank consists of a sealed structure with an internal cavity for housing the X-ray generating mechanism and filling it with insulating oil, which provides both high-voltage insulation and heat dissipation. A balancing bladder, a breathing bag, is fixedly positioned inside the upper part of the tank body, communicating with the cavity but physically isolated from the insulating oil. The breathing bag elastically deforms in response to the expansion or contraction of the insulating oil due to temperature changes, dynamically balancing the pressure inside and outside the tank body. One or more X-ray generating mechanisms, arranged side-by-side within the cavity of the tank body, generate X-rays. An insulating component surrounds the high-voltage components of the X-ray generating mechanism, enhancing high-voltage insulation performance and preventing insulating oil breakdown. An adapter plate, mounted on the top of the tank body, integrates external cable and pipeline connection interfaces, enabling connection between internal tank components and external systems. A pressure monitoring device, located inside the tank body or on a pipeline communicating with the cavity, monitors the pressure inside the tank body in real time.

[0007] According to at least one embodiment of the present invention, a pressure balancing structure for a radiation source oil tank includes a tank body and a cover plate. The tank body is a cavity structure with one open end, used to provide installation space and mechanical support for components. The cover plate is detachably fixed to the open end of the tank body through a sealing structure to form a sealed receiving cavity. The sealing structure adopts an oil-resistant sealing ring to ensure the sealing of the receiving cavity and prevent leakage of insulating oil.

[0008] According to at least one embodiment of the pressure balancing structure for a radiation source tank, the breathing bag is fixedly connected to the inner top wall of the tank body, specifically installed on the side of the cover plate facing the inside of the tank body. The breathing bag is made of a flexible, airtight, and corrosion-resistant polymer composite material, and is pre-filled with gas. It is completely isolated from the insulating oil in the tank body through the bag wall, thus avoiding contact between oil and gas and causing aging of the insulating oil.

[0009] According to at least one embodiment of the pressure balancing structure for a radiation source tank of the present invention, the number of breathing bags is one or more. When there are multiple breathing bags, they are arranged side by side or dispersedly above the interior of the tank body along the length of the cover plate. The multiple breathing bags work together to cope with the volume change of the insulating oil, thereby improving the stability and redundancy reliability of pressure compensation. The total capacity of the breathing bags is designed according to the volume of the insulating oil inside the tank body and the operating temperature range. Specifically, the volume of the insulating oil is obtained by calculating the difference between the internal volume of the tank body and the volume of the internal structural components. Then, the minimum total capacity of the breathing bags is determined according to the volume change of the insulating oil between the lowest and highest temperatures, ensuring that the total capacity of the breathing bags is greater than the maximum volume change of the insulating oil.

[0010] According to at least one embodiment of the present invention, a pressure balancing structure for a radiation source tank includes a radiation generating mechanism comprising an X-ray tube, a transformer assembly, and a back pressure sampling plate. The transformer assembly includes a high-voltage transformer that provides high voltage to the X-ray tube and a filament transformer that supplies power to the cathode of the X-ray tube. The high-voltage transformer and the filament transformer are fixedly mounted on the inner wall of the tank by bolts and electrically connected to the corresponding X-ray tube by a high-voltage cable. The back pressure sampling plate is used to sample the electrical signals of the high-voltage circuit in real time to provide feedback for system control.

[0011] According to at least one embodiment of the present invention, a pressure balancing structure for a radiation source oil tank includes an insulating assembly comprising an insulating box and an insulating cover. The insulating box is a sealed structure used to encapsulate the back pressure sampling plate, preventing the back pressure sampling plate from directly contacting the insulating oil and causing a short circuit. The insulating cover is made of a high-temperature and high-pressure resistant insulating material and is used to cover the main body of the X-ray tube, forming a double insulating barrier together with the insulating oil to improve the pressure resistance level of the X-ray tube.

[0012] According to at least one embodiment of the present invention, a pressure balancing structure for a radiation source tank includes an adapter plate fixedly installed on the outer surface of a cover plate, which integrates various standardized interfaces, including a high-voltage power socket, a low-voltage control signal connector, a grounding terminal, and a quick-connect oil circulation connector. All outgoing cables (such as transformer power lines, X-ray tube control lines, and back pressure sampling plate signal lines) and pipelines inside the tank are centrally connected to the corresponding terminals on the inner side of the adapter plate, and then quickly connected to external systems through the interfaces on the outer side of the adapter plate, simplifying the installation and maintenance process.

[0013] According to at least one embodiment of the present invention, a pressure balancing structure for a radiation source tank is provided, wherein the pressure monitoring device is a pressure sensor or a pressure gauge. When it is a pressure sensor, its probe extends into the receiving cavity of the tank body or is installed on a pipeline communicating with the receiving cavity. The pressure sensor is electrically connected to an external control system, converting the pressure signal into an electrical signal in real time and transmitting it to the control system, so that the operator can monitor the internal pressure status of the tank. When it is a pressure gauge, its probe is communicating with the receiving cavity, and the internal pressure of the tank is displayed intuitively through mechanical indication.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By incorporating a breather bag inside the oil tank, the system automatically responds to the volume expansion and contraction of the insulating oil due to temperature changes. When the oil temperature rises, the breather bag is compressed to a smaller volume; when the oil temperature drops, the breather bag expands to replenish the volume, thus maintaining a dynamic balance between the internal pressure of the oil tank and the external atmospheric pressure. This solves problems such as stress fatigue of the sealing ring, oil leakage, or intrusion of external moisture caused by drastic pressure fluctuations, improving the long-term sealing reliability and environmental adaptability of the oil tank.

[0015] 2. The compensation effect of the breather bag ensures that the oil tank remains filled with insulating oil at any operating temperature, keeping all high-voltage components continuously in a good insulating and heat-dissipating medium, thus guaranteeing the electrical safety and thermal stability of the equipment, especially the high-power dual-tube system. Furthermore, by placing the breather bag inside the upper part of the oil tank, it does not occupy additional external space, resulting in an extremely compact tank structure. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of a pressure balance structure for a radiation source oil tank according to an embodiment of the present invention. Figure 2 This is a front view of a pressure balance structure for a radiation source oil tank according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the AA section of a pressure balance structure for a radiation source oil tank according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the BB cross-section of a pressure balance structure for a radiation source oil tank according to an embodiment of the present invention.

[0017] In the picture: 10. Fuel tank body; 110. Box body; 120. Cover plate; 20. Radiation generating mechanism; 210. X-ray tube; 220. High-voltage transformer; 230. Filament transformer; 240. Back pressure sampling plate; 30. Breathing bag; 40. Insulation box; 50. Insulating cover; 60. Adapter board. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0019] It should be noted that, where there is no conflict, the embodiments and features described in this invention can be combined with each other. The technical solution of this invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise stated, the exemplary embodiments / exemplifications shown are to be understood as providing exemplary features of various details that provide ways in which the technical concept of the invention can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / exemplifications may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concept of the invention.

[0021] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0022] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, a mechanical connection, etc., and may or may not have intermediate components.

[0023] For descriptive purposes, the present invention may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0024] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0025] According to one embodiment of the present invention, a pressure balancing structure for a radiation source oil tank is provided, which is suitable for radiation source oil tanks in medical imaging equipment, and is particularly suitable for dual-tube integrated compact layout oil tanks. Through passive pressure compensation design, dynamic balance between the internal pressure of the oil tank and the external atmospheric pressure is achieved, ensuring the sealing and reliability of the equipment during long-term operation.

[0026] like Figures 1 to 4 As shown, the pressure balancing structure for the radiation source oil tank includes an oil tank body 10. The oil tank body 10 serves as the mounting base and sealing carrier for the entire structure and is made of high-strength metal materials (such as aluminum alloy and stainless steel), possessing good mechanical strength and corrosion resistance. The oil tank body 10 includes a box body 110 and a cover plate 120. The box body 110 is a cuboid or cylindrical cavity structure with one open end, forming an internal receiving cavity for installing components such as the radiation generating mechanism 20, the breathing bag 30, and insulating components. The cover plate 120 is detachably fixed to the open end of the box body 110 by bolts, and an oil-resistant sealing ring is provided between them to form a sealed receiving cavity, ensuring that the insulating oil does not leak and isolating moisture, dust, and other impurities from the external environment from intrusion.

[0027] The containment cavity of the oil tank body 10 is filled with insulating oil. The insulating oil serves as both an insulating and heat dissipation medium, enveloping all internal components. This not only prevents current leakage and achieves high-voltage insulation under high-voltage conditions, but also quickly absorbs the heat generated by the radiation generating mechanism 20 and transfers the heat to the tank wall to dissipate it into the external environment, ensuring the stable operation of the radiation source.

[0028] An adapter plate 60 is fixedly installed on the outer surface of the cover plate 120. The adapter plate 60 is made of high-strength plastic or metal sheet with excellent insulation properties and integrates various standardized interfaces, including a high-voltage power socket, a low-voltage control signal connector, a grounding terminal, and a quick-connect oil circulation connector. All outgoing components inside the oil tank, such as the power lines of the high-voltage transformer 220, the control lines of the filament transformer 230, the signal lines of the X-ray tube 210, the sampling lines of the back-pressure sampling board 240, and possible oil circulation pipelines, are centrally connected to the corresponding terminals or interfaces on the inner side of the adapter plate 60. Then, through the standardized interfaces on the outer side of the adapter plate 60, it quickly and reliably connects with external systems (such as high-voltage generator cabinets, equipment control systems, and cooling circulation units). This integrated interface design not only simplifies the connection process between the oil tank and external systems but also reduces the number of interfaces, lowers the risk of insulating oil leakage, and facilitates equipment installation, commissioning, and maintenance.

[0029] A balancing bladder is fixedly installed inside the upper part of the main body 10 of the oil tank. The balancing bladder is specifically a breathing bag 30. The breathing bag 30 is fixedly installed on the side of the cover plate 120 facing the inside of the tank body 110 by means of pressure plate, bolts or adhesive. It is suspended in the upper space of the receiving cavity and will not interfere with the radiation generating mechanism 20 and insulation components below. It makes full use of the idle space inside the oil tank, making the overall structure more compact, especially suitable for the compact layout requirements of the dual-tube integrated oil tank.

[0030] The breathing bag 30 is made of a flexible, airtight, and corrosion-resistant polymer composite material (such as fluororubber coated fabric or polytetrafluoroethylene composite material). It is pre-filled with a certain amount of dry air or inert gas (such as nitrogen). The wall of the breathing bag 30 forms a reliable physical barrier, which completely isolates the internal gas from the insulating oil in the oil tank cavity, avoiding contact between oil and gas that could lead to oxidation and aging of the insulating oil. At the same time, it prevents the insulating oil from seeping into the breathing bag 30 and affecting the pressure compensation effect.

[0031] The number of breathing bags 30 can be designed as one or more according to the oil tank capacity and spatial layout. When multiple breathing bags 30 are used, they are arranged side by side or dispersed along the length of the cover plate 120 in the upper part of the receiving cavity. Multiple breathing bags 30 work together to cope with the volume change of insulating oil and improve the redundancy and reliability of the pressure compensation system. The total capacity of the breathing bags 30 needs to be determined by precise calculation: First, the total volume V1 inside the box 110 is obtained through three-dimensional modeling or actual measurement. Then, the total volume V2 of all structural components inside the oil tank (including the ray generating mechanism 20, insulation components, and connecting parts of the adapter plate 60) is calculated. The volume of insulating oil in the receiving cavity is obtained by V1-V2. Then, according to the operating temperature range of the equipment (e.g., -10℃ to 60℃), the volume change ΔV of the insulating oil between the lowest and highest temperatures is calculated. The total capacity of the breathing bags 30 needs to be greater than ΔV to ensure that the volume change of the insulating oil can be completely absorbed and pressure balance is achieved.

[0032] The main body 10 of the tank houses two X-ray generating mechanisms 20, arranged side-by-side in the lower part of the tank 110, forming a dual-tube integrated layout to meet multi-mode imaging requirements. Each X-ray generating mechanism 20 includes a tube 210, a transformer assembly, and a backpressure sampling plate 240. The tube 210, as the core of the X-ray generation, is fixedly installed at the bottom of the tank 110, with its X-ray emission end facing the side wall or cover plate 120 of the tank 110 (designed according to the imaging requirements of the equipment). The transformer assembly includes a high-voltage transformer 220 and a filament transformer 230, which are bolted to the side wall of the tank 110, located on one side of the tube 210. The high-voltage transformer 220 is connected to the tube 210 via a high-voltage cable. The anode electrical connection is used to provide the high voltage required for X-ray generation in the X-ray tube 210. The filament transformer 230 is electrically connected to the cathode of the X-ray tube 210 through a low-voltage cable to heat the cathode filament and generate an electron beam. The back pressure sampling plate 240 is fixedly installed on the inner wall of the housing 110 and is electrically connected to the high-voltage transformer 220 and the filament transformer 230 through wires. It is used to sample the voltage, current and other electrical signals of the high-voltage circuit in real time and transmit the sampled signals to the external control system to provide feedback for the system's voltage regulation and safety protection.

[0033] To enhance high-voltage insulation performance and prevent the insulating oil from breaking down under high-voltage conditions, an insulating assembly is provided on the outside of the high-voltage components of the X-ray generating mechanism 20. This insulating assembly includes an insulating box 40 and an insulating cover 50. The insulating box 40 is a sealed box structure made of high-temperature and high-voltage resistant insulating materials (such as epoxy resin and ceramics). It is used to encapsulate the back-pressure sampling plate 240, completely isolating it from the insulating oil and preventing short circuits or decreased insulation performance caused by contact between the sampling circuit and the insulating oil. The insulating cover 50 is also made of high-strength insulating material. Its shape matches the main contour of the X-ray tube 210, covering the main body of the X-ray tube 210 (except for the X-ray exit window and connection end). Together with the insulating oil, it forms a double insulating barrier, significantly improving the withstand voltage level of the X-ray tube 210 and ensuring that insulation breakdown does not occur under high-voltage conditions.

[0034] The main body 10 of the oil tank is also equipped with a pressure monitoring device, preferably a pressure sensor. Its probe extends through the cover plate 120 or the side wall of the tank body 110 into the receiving cavity, directly contacting the insulating oil. The pressure sensor is electrically connected to an external control system, enabling real-time detection of the pressure value inside the oil tank and converting the pressure signal into an electrical signal for transmission to the control system. Operators can visually monitor the internal pressure status of the oil tank through the control system's display interface. When the pressure value exceeds the preset normal range, the control system can issue an alarm signal, indicating potential sealing failure or a malfunction of the breathing bag 30, facilitating timely troubleshooting and maintenance. In some preferred embodiments, the pressure monitoring device can also be a mechanical pressure gauge, with its probe connected to the receiving cavity, mechanically indicating the internal pressure of the oil tank via a pointer. This design is simple, inexpensive, and suitable for scenarios where high monitoring accuracy is not required.

[0035] The pressure balance working principle of this invention is as follows: When the X-ray source equipment starts working, the X-ray tube 210 generates a large amount of heat. This heat is transferred to the surrounding insulating oil through heat conduction, causing the insulating oil temperature to gradually rise and its volume to expand. At this time, the expanding insulating oil will exert pressure on the inner wall of the receiving cavity of the oil tank body 10, and simultaneously squeeze the breathing bag 30 located at the top of the receiving cavity. Since the breathing bag 30 is made of flexible material, under the pressure of the insulating oil, the breathing bag 30 will elastically contract, and the gas filled inside it will be compressed, thereby making room for the expanding insulating oil, preventing the internal pressure of the oil tank from rising excessively, and keeping the internal pressure of the oil tank in dynamic balance with the external atmospheric pressure.

[0036] After the equipment is shut down and cooled, the temperature of the insulating oil gradually decreases, and its volume shrinks accordingly. The pressure inside the main body 10 of the oil tank decreases, forming a slight negative pressure. At this time, the external atmospheric pressure acts on the internal gas through the bladder wall of the breathing bag 30, driving the breathing bag 30 to expand elastically and increase its volume. This fills the space left by the shrinkage of the insulating oil, preventing excessive negative pressure from forming inside the oil tank, and maintaining the balance between the internal pressure of the oil tank and the external atmospheric pressure.

[0037] Through the adaptive elastic deformation of the breathing bag 30, regardless of whether the insulating oil expands or contracts due to temperature changes, the pressure inside the tank body 10 can always maintain a dynamic balance with the external atmospheric pressure. This avoids repeated stress impacts on the sealing structure caused by drastic pressure fluctuations, significantly improves the service life of the tank sealing structure, prevents insulating oil leakage and the intrusion of external impurities, and ensures that the tank is always filled with insulating oil. All high-voltage components are continuously in a good insulation and heat dissipation environment, ensuring the electrical safety and thermal stability of the equipment, especially the dual-tube high-power system.

[0038] The pressure balancing structure for X-ray source oil tanks described in this invention achieves passive pressure compensation by incorporating a breather bag 30, physically isolated from the insulating oil, within the tank. This breather bag utilizes the breather bag's flexible deformation characteristics. The structure is compact, responsive, and requires no additional power source. The parallel layout of the dual X-ray tubes and the integrated adapter plate 60 design adapt to the needs of compact equipment, simplifying installation and maintenance. The insulation components enhance high-voltage insulation performance, ensuring the safety of the equipment under high-voltage conditions. This structure effectively solves the problems of sealing failure and insulating oil contamination caused by pressure fluctuations in traditional X-ray source oil tanks, providing a reliable guarantee for the long-term stable operation of X-ray source equipment.

[0039] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A pressure balancing structure for a radiation source oil tank, characterized in that, include: The oil tank body (10) is a sealed structure with an internal cavity for installing the radiation generating mechanism (20) and filling it with an insulating medium, which is insulating oil. Breathing bag (30), the breathing bag (30) is fixedly installed inside the upper part of the oil tank body (10), communicates with the receiving cavity of the oil tank body (10) and is physically isolated from the insulating oil. The breathing bag (30) undergoes elastic deformation in response to the volume expansion or contraction of the insulating oil caused by temperature change, so as to dynamically balance the pressure inside and outside the oil tank body (10). X-ray generating mechanism (20), which is installed in the receiving cavity of the oil tank body (10) and is used to generate X-rays; An insulating component, which is wrapped around the high-voltage component of the radiation generating mechanism (20), is used to enhance the high-voltage insulation performance; Adapter plate (60), which is installed on the top of the tank body (10) and is used to integrate the connection interface of external cables and pipelines; A pressure monitoring device is installed inside the tank body (10) or on a pipeline connected to the containment cavity, for real-time monitoring of the pressure status inside the tank body (10).

2. The pressure balancing structure for a radiation source oil tank according to claim 1, characterized in that, The main body (10) of the oil tank includes a tank body (110) and a cover plate (120). The tank body (110) is a cavity structure with one end open. The cover plate (120) is detachably fixed to the open end of the tank body (110) through a sealing structure to form a sealed receiving cavity. The sealing structure is an oil-resistant sealing ring.

3. The pressure balancing structure for a radiation source oil tank according to claim 2, characterized in that, The breathing bag (30) is fixedly installed on the side of the cover plate (120) facing the inside of the box (110). The breathing bag (30) is made of a flexible, airtight and insulating oil-resistant polymer composite material, and its interior is pre-filled with dry air or inert gas.

4. The pressure balancing structure for a radiation source oil tank according to claim 1, characterized in that, The number of breathing bags (30) is one or more. When there are multiple bags, they are arranged side by side or dispersed along the length of the cover plate (120) on the upper part of the receiving cavity. The total capacity of the breathing bags (30) is greater than the maximum volume change of the insulating oil within the operating temperature range.

5. The pressure balancing structure for a radiation source oil tank according to claim 1, characterized in that, There are two X-ray generating mechanisms (20), which are arranged side by side in the lower part of the housing (110). Each X-ray generating mechanism (20) includes an X-ray tube (210), a high-voltage transformer (220), a filament transformer (230), and a back pressure sampling plate (240). The high-voltage transformer (220) and the filament transformer (230) are fixedly installed on the inner wall of the housing (110) and electrically connected to the corresponding X-ray tube (210) through a cable. The back pressure sampling plate (240) is electrically connected to the high-voltage transformer (220) and the filament transformer (230) and is used to sample the electrical signals of the high-voltage circuit.

6. The pressure balancing structure for a radiation source oil tank according to claim 5, characterized in that, The insulation assembly includes an insulation box (40) and an insulation cover (50). The insulation box (40) is a sealed structure used to encapsulate the back pressure sampling plate (240). The insulation cover (50) covers the main body of the X-ray tube (210) and together with the insulating oil, forms a double insulation barrier.

7. The pressure balancing structure for a radiation source oil tank according to claim 2, characterized in that, The adapter plate (60) is fixedly installed on the outer surface of the cover plate (120), and integrates a high-voltage power socket, a low-voltage control signal connector, a grounding terminal and an oil circulation quick connector. The cables and pipelines inside the oil tank are centrally connected to the corresponding terminals on the inner side of the adapter plate (60).

8. The pressure balancing structure for a radiation source oil tank according to claim 1, characterized in that, The pressure monitoring device is a pressure sensor or a pressure gauge; when it is a pressure sensor, its probe extends into the receiving cavity and is electrically connected to the external control system; when it is a pressure gauge, its probe is connected to the receiving cavity.

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