X-ray generator with cooling device
By designing the X-ray tube cooling device and combining heat sinks, semiconductor coolers, and temperature sensors, the aging problem caused by high-temperature operation of the X-ray tube was solved, achieving stable operation and data stability of the X-ray tube.
Patent Information
- Application Number
- CN202423142009.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-19
AI Technical Summary
X-ray tubes are prone to aging under high-temperature operation, which can lead to damage to the anode target and unstable X-ray emission, affecting the accuracy of data from the X-ray surface density meter.
An X-ray generator with a cooling device was designed, including a heat sink, a semiconductor cooler, a fan, and a temperature sensor. The temperature of the X-ray tube is controlled by heat transfer oil and airflow circulation to ensure that it operates within a suitable temperature range.
Stable operation of the X-ray tube was achieved, the aging of the anode target was reduced, the data stability of the X-ray surface density meter was improved, and system errors were reduced.
Smart Images
Figure CN223771094U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of X-ray generating equipment, and specifically to an X-ray generator with a cooling device. Background Technology
[0002] The core component of an X-ray generator is the X-ray tube, which is a vacuum diode operating at high voltage. It contains two electrodes: a filament that emits electrons (cathode) and a target that receives electron bombardment (anode). Both electrodes are sealed within a high-vacuum glass or ceramic housing. The X-ray tube is a closed cylindrical body, with the cathode mounted at the front and the anode at the rear. X-ray generators generate significant heat when operating under positive high voltage, and this heat must be dissipated promptly to prevent the X-ray tube from burning out. In lithium battery coating lines, electrodes are coated with a slurry and then dried in a continuous oven. An X-ray areal density meter is used to monitor the coating quality of the electrodes online at the oven outlet. The X-ray generator is the core component that provides the X-rays used for measurement by the X-ray areal density meter. The actual full-load coating speed of lithium battery electrodes is 120 m / min. To fully dry the wet film electrodes, the length of the drying oven in the coating production line can reach 80 m, and the temperature of the dry film electrodes at the outlet can reach about 100°C. The measurement gap of the electrode areal density measuring instrument is 10 to 20 mm. The high-temperature electrodes within the measurement gap can raise the ambient temperature of the measurement environment to about 50°C.
[0003] The X-ray generator in an electrode areal density measuring instrument operates under continuous normal conditions, with a maximum tube voltage of 50KV and a maximum tube current of 1mA, generating approximately 50W of its own power. The efficiency of the X-ray tube is only about 1%, with a large amount of energy converted into heat. Prolonged high-temperature operation of the X-ray tube can easily lead to aging of the anode target, and even irreversible damage due to cracking. Furthermore, the amount of X-rays emitted by the X-ray tube varies at different operating temperatures. The X-rays provided by the X-ray generator in the X-ray areal density measuring instrument are for metrological purposes, and instability in the X-ray emission can introduce systematic errors into the data fed back by the instrument. Therefore, there is room for improvement in the existing technology to maintain the X-ray tube within a suitable temperature range during operation, thereby reducing anode target aging and enabling the X-ray tube to continuously emit relatively stable X-rays within a suitable temperature range. This would reduce the technical problem of increased systematic errors in the data fed back by the X-ray areal density measuring instrument due to unstable X-ray emission. Summary of the Invention
[0004] In view of the shortcomings of the prior art, this utility model provides an X-ray generator with a cooling device that enables the X-ray tube to operate at a suitable temperature, thereby overcoming the defects in the prior art.
[0005] The technical solution adopted by this utility model is as follows: an X-ray generator with a cooling device, including an X-ray tube, the X-ray tube including a tube body and a positive target disposed on the tube body, a first outer shell disposed on the outside of the X-ray tube, a first heat sink disposed on the outer end of the positive target of the X-ray tube, a cover plate disposed on the top of the first outer shell, a heat sink rod disposed on the cover plate, a rubber airbag disposed inside the first outer shell above the first heat sink, an air exchange valve disposed on the first outer shell and the rubber airbag, a second heat sink disposed on the heat sink rod on the side of the cover plate away from the first outer shell, an oil inlet disposed on the cover plate, the oil inlet communicating with the inner cavity of the first outer shell, a sealing screw disposed on the oil inlet, a first sealing ring disposed between the sealing screw and the oil inlet, and a second sealing ring disposed between the cover plate and the first outer shell.
[0006] Preferably, a temperature sensor is provided inside the first housing.
[0007] Preferably, a second outer shell is provided on the outside of the first outer shell and the heat sink rod, a second heat sink is located inside the second outer shell, a fourth heat sink is provided on one side of the second heat sink, a mounting groove is provided above the fourth heat sink, a semiconductor cooler is provided inside the mounting groove, a fifth heat sink is provided on the second outer shell above the semiconductor cooler, the fifth heat sink is connected to the hot end of the semiconductor cooler, and the fourth heat sink is connected to the cold end of the semiconductor cooler.
[0008] Preferably, the first outer shell adopts a barrel-shaped structure with an open top, and a cover plate is installed on the open end of the first outer shell. The cover plate includes a large end and a small end at the bottom of the large end. The cross-section of the cover plate adopts an inverted convex shape. The shape of the top part of the first outer shell matches the shape of the bottom part of the cover plate. A second sealing ring is located between the large end of the cover plate and the first outer shell. The X-ray tube also includes a radiation output end provided on the tube body and a connecting flange provided on the radiation output end. A third sealing ring is provided between the connecting flange and the first outer shell. Radiation passage holes are provided on the first and second outer shells below the radiation output end.
[0009] Preferably, thermally conductive silicone grease layers are respectively provided between the fourth heat sink and the cold end of the semiconductor cooler, and between the fifth heat sink and the hot end of the semiconductor cooler.
[0010] Preferably, a first fan is provided on the fourth heat sink, the first fan is located inside the second housing, and a second fan is provided on the fifth heat sink.
[0011] The beneficial effects of this invention are as follows: First, this invention enables the X-ray tube to operate at a suitable temperature, thereby allowing the X-ray tube to continuously and stably emit X-rays. This overcomes the problem of unstable X-ray emission due to unstable X-ray tube operating temperature, thus increasing the stability of the feedback data from the X-ray surface density measuring instrument and reducing system errors.
[0012] Secondly, a temperature sensor is provided inside the first housing of this invention. Installing a temperature sensor facilitates feedback on the temperature of the medium inside the first housing.
[0013] This utility model has a simple structure, is easy to operate, and has a clever design, which greatly improves work efficiency and has good social and economic benefits. It is a product that is easy to promote and use. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 for Figure 1 A magnified view of detail A.
[0016] Figure 3 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0017] like Figures 1 to 3 As shown, an X-ray generator with a cooling device includes an X-ray tube 1. The X-ray tube 1 includes a tube body and a positive target mounted on the tube body. A first outer shell 2 is provided on the outside of the X-ray tube 1. A first heat sink 3 is provided on the outer end of the positive target of the X-ray tube 1. A cover plate 5 is provided on the top of the first outer shell 2. A heat sink rod 6 is provided on the cover plate 5. A rubber airbag 7 is provided inside the first outer shell 2 above the first heat sink 3. The rubber airbag 7 is a bladder-like structure made of rubber. An air exchange valve 8 is provided on the first outer shell 2 and the rubber airbag 7. A second heat sink 9 is provided on the heat sink rod 6 on the side of the cover plate 5 away from the first outer shell 2. An oil inlet 10 is provided on the cover plate 5, which is connected to the inner cavity of the first outer shell 2. A sealing screw 11 is provided on the oil inlet 10. A first sealing ring 12 is provided between the sealing screw 11 and the oil inlet 10. A second sealing ring 13 is provided between the cover plate 5 and the first outer shell 2. Preferably, a temperature sensor 14 is provided inside the first outer shell 2. The temperature sensor 14 is installed to facilitate feedback of the medium temperature inside the first housing 2.
[0018] A second outer shell 16 is disposed outside the first outer shell 2 and the heat sink 6. A second heat sink 9 is located inside the second outer shell 16. A fourth heat sink 17 is disposed on one side of the second heat sink 9. A mounting groove 18 is disposed above the fourth heat sink 17. A thermoelectric cooler 19 is disposed inside the mounting groove 18. A fifth heat sink 20 is disposed on the second outer shell 16 above the thermoelectric cooler 19. The fifth heat sink 20 is connected to the hot end of the thermoelectric cooler 19, and the fourth heat sink 17 is connected to the cold end of the thermoelectric cooler 19. Thus, the second outer shell 16 provides a first heat exchange channel for heat exchange at the hot end of the thermoelectric cooler 19 and a second heat exchange channel for heat exchange at the cold end of the thermoelectric cooler 19. Furthermore, a first fan 24 is disposed on the fourth heat sink 17, which is located inside the second outer shell 16, and a second fan 25 is disposed on the fifth heat sink 20. Both the fourth heat sink 17 and the second heat sink 9 are finned heat sinks. The second heat sink 9 includes several first fins and several third heat exchange channels between the first fins. The fourth heat sink 17 includes several second fins and several fourth heat exchange channels between the second fins. The several third heat exchange channels are parallel to each other, and the several fourth heat exchange channels are parallel to each other. The first fan 24 is installed to drive the air inside the second outer shell 16 outside the first outer shell 2 to exchange heat with the fourth heat sink 17 to obtain a low-temperature airflow. A portion of the low-temperature airflow then exchanges heat with the second heat sink 9 to reduce the temperature of the second heat sink 9, thereby reducing the temperature of the heat sink rod 6. Furthermore, the heat sink rod 6 is a rod-shaped structure made of copper.
[0019] Furthermore, thermally conductive silicone grease layers 23 are respectively provided between the cold ends of the fourth heat sink 17 and the thermoelectric cooler 19, and between the hot ends of the fifth heat sink 20 and the thermoelectric cooler 19. This facilitates heat conduction between the hot ends of the fifth heat sink 20 and the thermoelectric cooler 19, as well as between the cold ends of the fourth heat sink 17 and the thermoelectric cooler 19.
[0020] The first outer shell 2 adopts a barrel-shaped structure with an open top. The cover plate 5 is installed on the open end of the first outer shell 2. The cover plate 5 includes a large end and a small end at the bottom of the large end. The cross-section of the cover plate 5 adopts an inverted convex shape. The shape of the top part of the first outer shell 2 and the shape of the bottom part of the cover plate 5 are matched. The second sealing ring 13 is located between the large end of the cover plate 5 and the first outer shell 2. The X-ray tube 1 also includes a radiation output end provided on the tube body and a connecting flange provided on the radiation output end. A third sealing ring 22 is provided between the connecting flange and the first outer shell 2. Installing the three sealing rings 22 facilitates the improvement of the sealing between the X-ray tube 1 and the first outer shell 2. Radiation passage holes 21 are provided on the first outer shell 2 and the second outer shell 16 below the radiation output end.
[0021] The instructions for using this product are as follows: Figures 1 to 3 As shown, during the assembly stage of this product, after installing the components inside the first housing 2, the sealing screw 11 should be loosened and heat-conducting oil should be injected into the oil inlet 10 until the heat-conducting oil fills the inner cavity of the first housing 2 to form a heat-conducting oil layer; then, the sealing screw 11 and the first sealing ring 12 should be reinstalled; then, the ventilation valve 8 should be opened; finally, the components on the outside of the first housing 2 should be installed.
[0022] When this product is in use, the first fan 24, the second fan 25 and the semiconductor cooler 19 are turned on. The heat released by the X-ray tube 1 during operation is transferred to the first heat sink 3. The first heat sink 3 transfers the heat to the heat-conducting oil layer. The temperature of the heat-conducting oil layer rises and continuously transfers the heat to the heat dissipation rod 6. The heat dissipation rod 6 then transfers the heat to the second heat sink 9.
[0023] The first fan 24 drives the air in the inner cavity of the second outer shell 16 outside the first outer shell 2 to continuously exchange heat with the fourth heat sink 17 to form a low-temperature airflow. The low-temperature airflow is divided into two parts, namely a first part of low-temperature airflow and a second part of low-temperature airflow. The first part of low-temperature airflow descends along the inner wall of the second outer shell 16 and is then transported back to the inner cavity of the second outer shell 16 below the first fan 24. The second part of low-temperature airflow passes through the second heat sink 9 to reduce the temperature of the second heat sink 9, thereby reducing the temperature of the heat sink 6 and the heat-conducting oil layer. The second part of low-temperature airflow forms a heat exchange airflow after heat exchange through the second heat sink 9. The heat exchange airflow descends along the inner wall of the second outer shell 16 to the inner cavity of the second outer shell 16 below the first fan 24. The heat exchange airflow and the first part of low-temperature airflow in the inner cavity of the second outer shell 16 below the first fan 24 form an airflow circulation after being driven by the first fan 24.
[0024] The fourth heat sink 17 continuously receives the cooling energy from the cold end of the thermoelectric cooler 19, while the heat from the hot end of the thermoelectric cooler 19 is transferred to the fifth heat sink 20. The second fan 25 continuously supplies air from the outside of the second housing 16 through the fifth heat sink 20, thereby reducing the heat of the fifth heat sink 20 and consequently lowering its temperature, as well as the temperature of the hot end of the thermoelectric cooler 19. In actual operation, the volume expansion of the heat-conducting oil layer due to its rising temperature requires volume compensation, which is achieved by compressing the rubber air bladder 7. This releases the air originally stored in the rubber air bladder 7 through the ventilation valve 8, thus avoiding leakage caused by the volume expansion of the heat-conducting oil layer due to heat. If the temperature sensor 14 indicates that the temperature is too high, the X-ray tube 1 needs to be shut off while the first fan 24, the second fan 25, and the thermoelectric cooler 19 remain on until the temperature sensor 14 returns to the preset range, at which point the X-ray tube 1 is restarted.
[0025] This embodiment enables the X-ray tube 1 to operate at a suitable temperature, thereby allowing the X-ray tube 1 to continuously and stably emit X-rays. This overcomes the problem of unstable X-ray quantity emitted due to unstable operating temperature of the X-ray tube 1, thus increasing the stability of the feedback data from the X-ray surface density measuring instrument and reducing system errors.
[0026] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. An X-ray generator with cooling, comprising an X-ray tube (1) which comprises a tube body and an anode target arranged on the tube body, characterized in that: The X-ray tube (1) is provided with a first shell (2) outside, a first heat sink (3) is arranged on the outer end of the anode target of the X-ray tube (1), a cover plate (5) is arranged on the top of the first shell (2), a heat dissipation rod (6) is arranged on the cover plate (5), a rubber air bag (7) is arranged in the first shell (2) above the first heat sink (3), an air exchange valve (8) is arranged on the first shell (2) and the rubber air bag (7), a second heat sink (9) is arranged on the heat dissipation rod (6) away from the first shell (2) on the side of the cover plate (5), an oil inlet (10) is arranged on the cover plate (5), the oil inlet (10) is communicated with the inner cavity of the first shell (2), a sealing screw (11) is arranged on the oil inlet (10), a first sealing ring (12) is arranged between the sealing screw (11) and the oil inlet (10), and a second sealing ring (13) is arranged between the cover plate (5) and the first shell (2).
2. The X-ray generator with cooling device according to claim 1, characterized in that: The first shell (2) is provided with a temperature sensor (14).
3. The X-ray generator with cooling device according to claim 1, characterized in that: The first shell (2) and the heat dissipation rod (6) are provided with a second shell (16) outside, the second heat sink (9) is located in the second shell (16), a fourth heat sink (17) is arranged on one side of the second heat sink (9), an installation groove (18) is arranged above the fourth heat sink (17), a semiconductor refrigerator (19) is arranged inside the installation groove (18), a fifth heat sink (20) is arranged above the second shell (16) of the semiconductor refrigerator (19), the fifth heat sink (20) is connected with the hot end of the semiconductor refrigerator (19), and the fourth heat sink (17) is connected with the cold end of the semiconductor refrigerator (19).
4. The X-ray generator with cooling device according to claim 3, characterized in that: The first shell (2) adopts a barrel-shaped structure with an open top, the cover plate (5) is installed on the open end of the first shell (2), the cover plate (5) comprises a large head end and a small head end arranged at the bottom of the large head end, the cross section of the cover plate (5) adopts an inverted convex character structure, the shape of part of the top of the first shell (2) is matched with the shape of part of the bottom of the cover plate (5), the second sealing ring (13) is located between the large head end of the cover plate (5) and the first shell (2), the X-ray tube (1) further comprises a ray output end arranged on the tube body and a connecting flange arranged on the ray output end, a third sealing ring (22) is arranged between the connecting flange and the first shell (2), and a ray passing hole (21) is arranged on the first shell (2) and the second shell (16) below the ray output end.
5. The X-ray generator with cooling device according to claim 3, characterized in that: Thermally conductive silicone grease layers (23) are arranged between the fourth heat sink (17) and the cold end of the semiconductor refrigerator (19) and between the fifth heat sink (20) and the hot end of the semiconductor refrigerator (19) respectively.
6. The X-ray generator with cooling device according to claim 3, characterized in that: A first fan (24) is arranged on the fourth heat sink (17), and the first fan (24) is located in the second shell (16); and a second fan (25) is arranged on the fifth heat sink (20).