Cooling structure for X-ray tube

Abstract

The utility model discloses a cooling structure for an X-ray tube, the X-ray tube comprises a cathode for generating emission electrons, an anode for receiving electron bombardment and generating X-rays, and a tube shell for accommodating the cathode and the anode and providing a vacuum environment, the cooling structure comprises air cooling equipment and liquid cooling equipment, the air cooling equipment is arranged close to the anode and is used for cooling the anode, a sealing cover is fixed at the end part of the anode, a cavity is formed between the anode and the sealing cover, and the liquid cooling equipment is communicated with the cavity; and the liquid cooling equipment is used for driving a cooling medium to perform closed circulation between the liquid cooling equipment and the cavity so as to cool the anode. According to the cooling structure of the X-ray tube, the cooling efficiency of the anode of the X-ray tube in the exhaust process is improved, the anode degassing effect of the X-ray tube is enhanced, the vacuum degree of the X-ray tube is improved, the service life of the X-ray tube is prolonged, and the working stability of the X-ray tube is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of X-ray tubes, in particular to a cooling structure for X-ray tubes. Background Art

[0002] The working principle of the X-ray tube is that the hot electrons excited by the high temperature at the cathode bombard the anode target at high speed under the action of the high voltage electric field, thereby generating bremsstrahlung and characteristic radiation, that is, forming X-rays. In the process of generating X-rays, only 1% of the electron kinetic energy is converted into X-rays, while more than 99% is converted into thermal energy. The temperature in the electron bombardment area can even reach 2600℃~2700℃.

[0003] At present, the exhaust process of X-ray tubes adopts air cooling to dissipate the heat of the tube anode. Due to the limitation of the heat dissipation effect of air cooling, the heat dissipation efficiency of the anode during exhaust is very low, whether it is a ball bearing or a liquid metal bearing tube, which reduces the effect of anode degassing and affects the service life and working stability of the X-ray tube. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a cooling structure for an X-ray tube, which improves the anode heat dissipation efficiency, improves the anode degassing effect, and improves the service life and working stability of the X-ray tube.

[0005] The utility model is realized by the following technical solutions:

[0006] A cooling structure for an X-ray tube, the X-ray tube comprising a cathode for generating emitted electrons, an anode for receiving electron bombardment and generating X-rays, and a tube shell for accommodating the cathode and the anode and providing a vacuum environment, the cooling structure comprising an air cooling device and a liquid cooling device, the air cooling device being arranged close to the anode for cooling the anode, a sealing cover being fixed at the end of the anode, and a cavity being formed between the anode and the sealing cover, the liquid cooling device being connected to the cavity, and the liquid cooling device being used to drive a cooling medium to flow in a closed manner between the liquid cooling device and the cavity to cool the anode.

[0007] Furthermore, the liquid cooling device includes a circulating oil pump, and the circulating oil pump is connected to the cavity to drive the cooling medium to flow in a closed manner between the circulating oil pump and the cavity.

[0008] Furthermore, the liquid cooling device also includes a heat sink, which is fixed on the circulating oil pump to dissipate heat in the cooling medium.

[0009] Furthermore, the liquid cooling device also includes an oil inlet pipe and an oil outlet pipe, one end of the oil inlet pipe passes through the sealing cover and is suspended in the cavity, and the other end is connected to the outlet of the circulating oil pump; one end of the oil outlet pipe passes through the sealing cover and is suspended in the cavity, and the other end is connected to the inlet of the circulating oil pump.

[0010] Furthermore, one end of the oil inlet pipe is arranged close to the bottom wall of the cavity.

[0011] Furthermore, the projection of the oil inlet pipe on the bottom wall is located at the center of the bottom wall.

[0012] Furthermore, one end of the oil outlet pipe is arranged close to the sealing cover.

[0013] Furthermore, the sealing cover is provided with a first hole and a second hole, the oil inlet pipe passes through the first hole, and the oil outlet pipe passes through the second hole.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] Compared with air cooling alone, the added cooling medium can further improve the heat dissipation effect of the anode in the exhaust process. The circulation of the cooling medium can keep the anode at a lower temperature for a long time, thereby reducing the residual gas content inside the material, improving the internal vacuum of the tube during long-term operation, and improving the service life and working stability of the X-ray tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a cooling structure for an X-ray tube according to an embodiment of the present invention.

[0017] 1. X-ray tube; 10. cathode; 11. anode; 110. cavity; 111. bottom wall; 12. tube shell; 2. air cooling device; 3. liquid cooling device; 30. circulating oil pump; 300. outlet; 301. inlet; 31. heat sink; 32. oil inlet pipe; 33. oil outlet pipe; 4. sealing cover; 40. first channel; 41. second channel. DETAILED DESCRIPTION

[0018] The following is a further non-restrictive detailed description of the utility model technical solution in conjunction with the preferred embodiment and its accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limitations on the utility model.

[0019] like Figure 1 As shown, a cooling structure for an X-ray tube according to an embodiment of the utility model, wherein the X-ray tube 1 comprises a cathode 10 for generating and emitting electrons, an anode 11 for receiving electron bombardment and generating X-rays, and a tube shell 12 for accommodating the cathode 10 and the anode 11 and providing a vacuum environment, and the cooling structure comprises an air cooling device 2 and a liquid cooling device 3, the air cooling device 2 is arranged near the anode 11 for cooling the anode 11, a sealing cover 4 is fixed at the end of the anode 11, and a cavity 110 is formed between the anode 11 and the sealing cover 4, the liquid cooling device 3 is connected to the cavity 110, and the liquid cooling device 3 is used to drive the cooling medium to flow in a closed manner between the liquid cooling device 3 and the cavity 110 to cool the anode 11. It is worth noting that the cooling medium can be oil or other cooling medium, such as water.

[0020] The liquid cooling device 3 includes a circulating oil pump 30 and a heat sink 31. The circulating oil pump 30 is connected to the cavity 110 to drive the cooling medium to flow in a closed manner between the circulating oil pump 30 and the cavity 110. The heat sink 31 is fixed to the circulating oil pump 30 to dissipate the heat in the cooling medium. The heat sink 31 can be a radiator or a cooling fan.

[0021] The liquid cooling device 3 also includes an oil inlet pipe 32 and an oil outlet pipe 33. One end of the oil inlet pipe 32 passes through the sealing cover 4 and is suspended in the cavity 110, and the other end is connected to the outlet 300 of the circulating oil pump 30. One end of the oil outlet pipe 33 passes through the sealing cover 4 and is suspended in the cavity 110, and the other end is connected to the inlet 301 of the circulating oil pump 30.

[0022] Specifically, one end of the oil inlet pipe 32 is disposed close to the bottom wall 111 of the cavity 110 , and the projection of the oil inlet pipe 32 on the bottom wall 111 is located at the center of the bottom wall 111 . One end of the oil outlet pipe 33 is disposed close to the sealing cover 4 .

[0023] A sealing ring (not shown) is provided between the sealing cover 4 and the anode 11 , and a first hole 40 and a second hole 41 are provided on the sealing cover 4 . The oil inlet pipe 32 passes through the first hole 40 , and the oil outlet pipe 33 passes through the second hole 41 .

[0024] During operation, the cooling medium with a relatively low temperature flows out from the outlet 300 of the circulating oil pump 30 through the oil inlet pipe 32 to the bottom wall 111 of the cavity 110, and the cooling medium with a relatively high temperature in the cavity 110 floats up through the oil outlet pipe 33 and flows into the circulating oil pump 30, and the heat sink 31 cools the cooling medium in the circulating oil pump 30, and the cycle repeats. Compared with air cooling alone, the added cooling medium can further improve the heat dissipation effect of the anode 11 in the exhaust process, and the circulation of the cooling medium can keep the anode 11 at a relatively low temperature for a long time, thereby improving the degassing effect of the anode, thereby reducing the residual gas content inside the material, improving the internal vacuum degree of the tube during long-term operation, and improving the service life and working stability of the X-ray tube.

[0025] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cooling structure for an X-ray tube, characterized in that: The X-ray tube (1) comprises a cathode (10) for generating and emitting electrons, an anode (11) for receiving electron bombardment and generating X-rays, and a tube shell (12) for accommodating the cathode (10) and the anode (11) and providing a vacuum environment. The cooling structure comprises an air cooling device (2) and a liquid cooling device (3). The air cooling device (2) is arranged close to the anode (11) and is used for cooling the anode (11). A sealing cover (4) is fixed to the end of the anode (11), and a cavity (110) is formed between the anode (11) and the sealing cover (4). The liquid cooling device (3) is connected to the cavity (110), and the liquid cooling device (3) is used for driving a cooling medium to flow in a closed manner between the liquid cooling device (3) and the cavity (110) to cool the anode (11).

2. The cooling structure for an X-ray tube according to claim 1, characterized in that: The liquid cooling device (3) comprises a circulating oil pump (30), wherein the circulating oil pump (30) is connected to the cavity (110) and is used to drive the cooling medium to flow in a closed manner between the circulating oil pump (30) and the cavity (110).

3. The cooling structure for an X-ray tube according to claim 2, characterized in that: The liquid cooling device (3) further comprises a heat sink (31), wherein the heat sink (31) is fixed to the circulating oil pump (30) and is used to dissipate heat in the cooling medium.

4. The cooling structure for an X-ray tube according to claim 2, characterized in that: The liquid cooling device (3) further comprises an oil inlet pipe (32) and an oil outlet pipe (33); one end of the oil inlet pipe (32) passes through the sealing cover (4) and is suspended in the cavity (110), and the other end is communicated with the outlet (300) of the circulating oil pump (30); one end of the oil outlet pipe (33) passes through the sealing cover (4) and is suspended in the cavity (110), and the other end is communicated with the inlet (301) of the circulating oil pump (30).

5. The cooling structure for an X-ray tube according to claim 4, characterized in that: One end of the oil inlet pipe (32) is arranged close to the bottom wall (111) of the cavity (110).

6. The cooling structure for an X-ray tube according to claim 5, characterized in that: The projection of the oil inlet pipe (32) on the bottom wall (111) is located at the center of the bottom wall (111).

7. The cooling structure for an X-ray tube according to claim 4, characterized in that: One end of the oil outlet pipe (33) is arranged close to the sealing cover (4).

8. The cooling structure for an X-ray tube according to claim 4, characterized in that: The sealing cover (4) is provided with a first hole (40) and a second hole (41); the oil inlet pipe (32) passes through the first hole (40) and the oil outlet pipe (33) passes through the second hole (41).

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