Transmission type X-ray tube

Abstract

The invention relates to the technical field of X-ray tubes, in particular to a transmission-type X-ray tube which comprises a vacuum tube and a cleaning mechanism. The cleaning mechanism comprises a driving assembly and a cleaning assembly, the cleaning assembly is arranged in the vacuum tube and attached to the inner wall of the vacuum tube, the driving assembly is arranged on the vacuum tube and connected with the cleaning assembly, and the driving assembly is used for driving the cleaning assembly to move in the vacuum tube. And the cleaning assembly is used for cleaning the inner wall of the vacuum tube. The X-ray tube has the effect of reducing the possibility of damage to the X-ray tube.

Description

Technical Field

[0001] The present application relates to the technical field of X-ray tubes, and in particular to a transmission type X-ray tube. Background Art

[0002] At present, a transmission X-ray tube generally includes a vacuum tube, a cathode and an anode, and the cathode and the anode are arranged in the vacuum tube. Its working principle is to generate electrons by heating the cathode, and the electrons are accelerated under the action of the high-voltage electric field and collide with the anode target, generating X-rays through bremsstrahlung. The X-rays will pass through the anode target and be emitted from the window end for imaging or detection. In the related art, the transmission X-ray tube generally adopts a closed design, and the internal cathode mostly uses a tungsten wire as an electron source, and the electrons are emitted by heating the tungsten wire.

[0003] Regarding the above-mentioned related technologies: under high temperature, the tungsten filament will produce vaporization phenomenon, and the vaporized tungsten atoms will accumulate on the inner wall of the vacuum tube to form a tungsten layer, which will easily cause the electron beam emitted from the cathode to generate an arc. The arc hits the inner wall of the vacuum tube, which can easily cause damage to the vacuum tube wall and further damage the X-ray tube. Summary of the invention

[0004] In order to reduce the possibility of damage to the X-ray tube, the present application provides a transmission type X-ray tube.

[0005] The present application provides a transmission type X-ray tube, which adopts the following technical solution: A transmission X-ray tube, comprising: Vacuum tubes; The cleaning mechanism includes a driving component and a cleaning component. The cleaning component is arranged in the vacuum tube and fits the inner wall of the vacuum tube. The driving component is arranged on the vacuum tube and connected to the cleaning component. The driving component is used to drive the cleaning component to move in the vacuum tube so that the cleaning component cleans the inner wall of the vacuum tube.

[0006] By adopting the above technical solution, when the vacuum tube needs to be cleaned, the driving component drives the cleaning component to work, so that the cleaning component cleans the inner wall of the vacuum tube to remove the tungsten layer accumulated on the inner wall of the vacuum tube, thereby helping to avoid the generation of arcs in the vacuum tube, thereby reducing the possibility of damage to the vacuum tube, and further helping to reduce the possibility of damage to the X-ray tube.

[0007] Optionally, a cathode, an anode target and a transmission window are respectively arranged in the vacuum tube, the transmission window is arranged opposite to the cathode, the anode target is arranged on a side of the transmission window close to the cathode, and the driving component and the cleaning component are respectively arranged close to the cathode.

[0008] By adopting the above technical solution, when the X-ray tube is working, the cathode emits electrons to the anode target, so that the electrons collide with the anode target, thereby generating X-rays, and the X-rays pass through the anode target and the transmission window, thereby facilitating the emission of X-rays using the X-ray tube.

[0009] Optionally, the cleaning component includes a support ring and an adsorption ring arranged on the support ring, the support ring is slidably arranged in the vacuum tube and connected to the driving component, the adsorption ring is in contact with the inner wall of the vacuum tube, and the driving component is used to drive the support ring to move in the vacuum tube.

[0010] By adopting the above technical solution, when the driving component is working, the driving component can drive the support ring to move in the vacuum tube, and the support ring can drive the adsorption ring to move, so that the adsorption ring can adsorb the tungsten layer accumulated on the inner wall of the vacuum tube, thereby facilitating the removal of the tungsten layer accumulated on the inner wall of the vacuum tube.

[0011] Optionally, a guide piece is provided on the inner wall of the vacuum tube along its length direction, and guide grooves are respectively provided on the support ring and the adsorption ring, and the guide piece is slidably inserted in the guide grooves.

[0012] By adopting the above technical solution, the guide member is inserted into the guide groove, so that the guide member can guide the support ring and the adsorption ring, which is beneficial to reduce the possibility of the support ring and the adsorption ring being offset during movement, and further beneficial to improve the stability of the support ring and the adsorption ring in the vacuum tube.

[0013] Optionally, a plurality of guide members are provided, and the plurality of guide members are evenly distributed in the vacuum tube, and the number of guide grooves is equal to the number of guide members and are arranged in one-to-one correspondence.

[0014] By adopting the above technical solution, a plurality of guide members cooperate with each other to jointly support the support ring and the adsorption ring, thereby further improving the stability of the support ring and the adsorption ring in moving in the vacuum tube.

[0015] Optionally, a receiving groove is provided on the outer wall of the vacuum tube at a position corresponding to the guide member, a heat sink is provided in the receiving groove, and the heat sink protrudes from the receiving groove.

[0016] By adopting the above technical solution, the heat sink is arranged in the accommodating groove, which increases the heat dissipation area of ​​the vacuum tube to a certain extent, thereby facilitating improving the heat dissipation efficiency of the vacuum tube and reducing the heat accumulation inside the vacuum tube.

[0017] Optionally, the heat sink is designed to be wavy.

[0018] By adopting the above technical solution, the heat sink is designed in a wave shape, which increases the heat dissipation area of ​​the heat sink to a certain extent, thereby helping to improve the heat dissipation efficiency of the heat sink, so that the heat sink can be used to dissipate heat for the vacuum tube, which is beneficial to reduce heat accumulation inside the vacuum tube.

[0019] Optionally, a sliding hole is provided on the vacuum tube, and the driving assembly includes a driving push rod and a sealing telescopic sleeve. The driving push rod slides through the sliding hole and is connected to the support ring. One end of the driving push rod away from the support ring extends out of the vacuum tube. The sealing telescopic sleeve is respectively connected to the vacuum tube and the support ring and is sleeved on the driving push rod, and the sliding hole is connected to the sealing telescopic sleeve.

[0020] By adopting the above technical solution, when the vacuum tube needs to be cleaned, the driving push rod is moved, so that the driving push rod drives the support ring to move, and the support ring drives the adsorption ring to move, so that the adsorption ring is used to clean the tungsten layer accumulated on the inner wall of the vacuum tube, thereby reducing the possibility of damage to the vacuum tube. In this process, the sealing telescopic sleeve can extend or contract with the movement of the support ring, which is conducive to reducing the possibility of the sealing telescopic sleeve interfering with the movement of the support ring, and is convenient for isolating the sliding hole with the sealing telescopic sleeve, so that the sliding hole is not easily connected with the inside of the vacuum tube, and to a certain extent, the vacuum degree inside the vacuum tube is avoided from being reduced.

[0021] Optionally, the driving push rod includes a first rod portion and a second rod portion, the first rod portion passes through the sliding hole and is connected to the support ring, the end of the first rod portion away from the support ring is hinged to the second rod portion, and a clamping groove is provided on the end surface of the vacuum tube close to the sliding hole, and when the sealing telescopic sleeve is in a contracted state, the second rod portion can be inserted into the clamping groove.

[0022] By adopting the above technical solution, when it is necessary to push the support ring to move in a direction away from the sliding hole, the second rod portion is rotated so that the second rod portion is parallel to the first rod portion, and the second rod portion can be inserted into the sliding hole at this time, so that the first rod portion and the second rod portion cooperate with each other to push the support ring to move. And when the sealing telescopic sleeve is in a contracted state, the second rod portion is located outside the sliding hole, so it is easy to rotate the second rod portion so that the second rod portion is inserted into the clamping groove, which is conducive to reducing the space required for the second rod portion.

[0023] Optionally, a sealing gasket is filled between the inner wall of the clamping groove and the second rod portion.

[0024] By adopting the above technical solution, when the second rod portion is inserted into the snap-in slot, a sealing gasket is filled between the second rod portion and the inner wall of the snap-in slot, which helps to reduce the possibility of shaking or moving of the second rod portion in the snap-in slot, and further helps to improve the stability of the second rod portion inserted in the snap-in slot.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the cooperation between the driving component and the cleaning component, the driving component can drive the cleaning component to move in the vacuum tube, so as to use the cleaning component to clean the tungsten layer accumulated on the inner wall of the vacuum tube, thereby helping to avoid arcing in the vacuum tube, thereby reducing the possibility of damage to the vacuum tube, and further helping to reduce the possibility of damage to the X-ray tube; 2. Through the cooperation of the support ring, the adsorption ring, the driving push rod and the sealing telescopic sleeve, the driving push rod can drive the support ring to move, and the support ring can drive the adsorption ring to move, so that the tungsten layer accumulated on the inner wall of the vacuum tube can be cleaned by the adsorption ring, which is conducive to reducing the possibility of damage to the vacuum tube. In this process, the sealing telescopic sleeve can be extended or contracted with the movement of the support ring, which is conducive to reducing the possibility of interference of the sealing telescopic sleeve with the movement of the support ring, and on the other hand, it is convenient to use the sealing telescopic sleeve to seal the sliding hole, so as to avoid the reduction of the vacuum degree inside the vacuum tube; 3. Through the mutual cooperation of the vacuum tube, the first rod and the second rod, when the support ring is in the initial position, the second rod can be inserted into the clamping groove, thereby facilitating the reduction of the space required for the second rod; 4. The setting of the heat sink increases the heat dissipation area of ​​the vacuum tube to a certain extent, which is beneficial to improving the heat dissipation efficiency of the vacuum tube, and further helps to reduce the heat accumulation inside the vacuum tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a transmission-type X-ray tube in Example 1 of the present application.

[0027] Figure 2 It is a side view of a transmission-type X-ray tube in Example 1 of the present application.

[0028] Figure 3 is along Figure 2 Sectional view along line BB.

[0029] Figure 4 is along Figure 1 Section view along line AA.

[0030] Figure 5 is along Figure 2 Sectional view along the CC line.

[0031] Figure 6 A schematic diagram of the overall structure of a transmission-type X-ray tube in Example 2 of the present application.

[0032] Description of reference numerals: 1. Vacuum tube; 11. Guide; 12. Slide hole; 13. Snap-in groove; 131. Sealing gasket; 14. Accommodating groove; 15. Heat sink; 2. Cathode; 3. Anode target; 4. Transmission window; 5. Cleaning mechanism; 51. Driving assembly; 511. Driving push rod; 5111. First rod portion; 5112. Second rod portion; 512. Sealing telescopic sleeve; 52. Cleaning assembly; 521. Support ring; 522. Adsorption ring; 523. Guide groove. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a transmission type X-ray tube.

[0035] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] Embodiment 1: Reference Figure 1-3 The transmission type X-ray tube comprises a vacuum tube 1, a cathode 2, an anode target 3, a transmission window 4 and a cleaning mechanism 5. The cathode 2, the anode target 3 and the transmission window 4 are sequentially arranged in the vacuum tube 1, and the anode target 3 is arranged opposite to the cathode 2. The cleaning mechanism 5 is arranged in the vacuum tube 1 and close to the cathode 2. The cleaning component 52 is used to clean the inner wall of the vacuum tube 1 to remove the tungsten layer accumulated on the inner wall of the vacuum tube 1, so as to avoid arcing in the vacuum tube 1, and further reduce the possibility of damage to the X-ray tube.

[0037] Reference Figure 3 When the cathode 2 generates electrons, the electrons will be accelerated under the action of the high voltage electric field and collide with the anode target 3, causing the anode target 3 to emit X-rays, and the X-rays will pass through the anode target 3 and the transmission window 4 to detect the sample.

[0038] It should be noted that in the embodiments of the present application, the specific designs of the cathode 2, the anode target 3 and the transmission window 4 are conventional technical means for those skilled in the art, and therefore will not be described in detail in the embodiments of the present application.

[0039] Reference Figure 3 The cleaning mechanism 5 includes a driving component 51 and a cleaning component 52. The cleaning component 52 is arranged in the vacuum tube 1 and fits with the inner wall of the vacuum tube 1. The driving component 51 is arranged on the vacuum tube 1 and connected to the cleaning component 52. The driving component 51 is used to drive the cleaning component 52 to move in the vacuum tube 1 so that the cleaning component 52 cleans the inner wall of the vacuum tube 1.

[0040] A guide member 11 is integrally formed on the inner wall of the vacuum tube 1 along its length direction, and a plurality of guide members 11 are provided, and the plurality of guide members 11 are evenly distributed in the vacuum tube 1 .

[0041] Reference Figure 3 The cleaning assembly 52 includes a support ring 521 and an adsorption ring 522 fixedly connected to the support ring 521. The support ring 521 is slidably disposed in the vacuum tube 1 and is in contact with the inner wall of the vacuum tube 1. The support ring 521 and the adsorption ring 522 are both spaced apart from the cathode 2. In this embodiment, an insulating sleeve (not shown in the figure) is disposed on the support ring 521 and the adsorption ring 522 to avoid attracting the electron beam.

[0042] Reference Figure 3 and Figure 4 Guide grooves 523 are respectively provided on the support ring 521 and the adsorption ring 522. The number of the guide grooves 523 is equal to the number of the guide members 11, and one guide member 11 is slidably inserted in one guide groove 523, so that multiple guide members 11 can jointly support the support ring 521 and the adsorption ring 522 to improve the stability of the support ring 521 and the adsorption ring 522 in the vacuum tube 1.

[0043] Reference Figure 3 The adsorption ring 522 is fitted with the inner wall of the vacuum tube 1. In this embodiment, the adsorption ring 522 is made of activated carbon, so that the adsorption ring 522 can be used to adsorb the tungsten layer in the vacuum tube 1. In other embodiments, the adsorption ring 522 can also be made of special alloys.

[0044] Reference Figure 3 and Figure 5 A sliding hole 12 is provided at one end of the vacuum tube 1 close to the cathode 2, and the driving assembly 51 includes a driving push rod 511 and a sealing telescopic sleeve 512. The driving push rod 511 includes a first rod portion 5111 and a second rod portion 5112, the first rod portion 5111 passes through the sliding hole 12 and is connected to the support ring 521, and one end of the first rod portion 5111 away from the support ring 521 is hinged to the second rod portion 5112.

[0045] Reference Figure 5 When the support ring 521 needs to be pushed to move, the second rod portion 5112 is rotated so that the second rod portion 5112 is parallel to the first rod portion 5111. At this time, the second rod portion 5112 can be inserted into the sliding hole 12, so that the first rod portion 5111 and the second rod portion 5112 cooperate with each other to push the support ring 521 to move.

[0046] Reference Figure 5 The end surface of the vacuum tube 1 close to the slide hole 12 is provided with a snap-in groove 13. When the support ring 521 moves to a direction close to the slide hole 12, the second rod portion 5112 is located outside the vacuum tube 1. At this time, the second rod portion 5112 can be rotated into the snap-in groove 13, thereby facilitating reducing the space required for the second rod portion 5112 to occupy.

[0047] Reference Figure 2 In this embodiment, a sealing gasket 131 is installed in the clamping groove 13. When the second rod portion 5112 is inserted into the clamping groove 13, the sealing gasket 131 can be filled between the second rod portion 5112 and the inner wall of the clamping groove 13, thereby reducing the possibility of the second rod portion 5112 shaking or moving in the clamping groove 13, thereby facilitating the improvement of the stability of the second rod portion 5112 inserted in the clamping groove 13.

[0048] Reference Figure 5 The sealing telescopic sleeve 512 is sleeved on the first rod portion 5111, and the sealing telescopic sleeve 512 is fixedly connected to the vacuum tube 1 and the support ring 521 respectively, and the sliding hole 12 is communicated with the sealing telescopic sleeve 512, so that the sealing telescopic sleeve 512 can extend or contract with the movement of the support ring 521, which is beneficial to reduce the possibility of the sealing telescopic sleeve 512 interfering with the movement of the support ring 521 on the one hand, and on the other hand, it is convenient to use the sealing telescopic sleeve 512 to seal the sliding hole 12, so that the sliding hole 12 is not easily communicated with the inside of the vacuum tube 1, and to a certain extent, the reduction of the vacuum degree inside the vacuum tube 1 is avoided.

[0049] When the second rod portion 5112 is inserted into the clamping groove 13 , the sealing telescopic sleeve 512 is in a contracted state. At this time, the support ring 521 is close to the sliding hole 12 , so that the electrons emitted by the cathode 2 are not easy to collide with the support ring 521 .

[0050] The implementation principle of a transmission type X-ray tube in the embodiment of the present application is as follows: when the vacuum tube 1 needs to be cleaned, the second rod 5112 is first rotated so that the second rod 5112 is disengaged from the clamping groove 13 and is flush with the first rod 5111, and then the second rod 5112 is pushed so that the second rod 5112 moves into the vacuum tube 1, and the second rod 5112 applies a thrust to the support ring 521 through the first rod 5111 to push the support ring 521 to move. The support ring 521 drives the adsorption ring 522 to move so that the adsorption ring 522 adsorbs the tungsten layer accumulated on the inner wall of the vacuum tube 1, thereby facilitating the removal of the tungsten layer accumulated on the inner wall of the vacuum tube 1.

[0051] Next, the second rod 5112 is pulled in the reverse direction to move the second rod 5112 away from the vacuum tube 1, so that the second rod 5112 is separated from the slide hole 12, and then the second rod 5112 is rotated to insert the second rod 5112 into the clamping groove 13. At this time, the support ring 521 and the adsorption ring 522 return to their original positions, thereby completing the cleaning process of the vacuum tube 1.

[0052] During this process, the sealing telescopic sleeve 512 can extend or contract as the supporting ring 521 moves, so as to seal the sliding hole 12 , thereby preventing the vacuum degree inside the vacuum tube 1 from decreasing.

[0053] Embodiment 2: Reference Figure 4 and Figure 6 The difference between this embodiment and the first embodiment is that a receiving groove 14 is provided on the outer wall of the vacuum tube 1 at a position corresponding to the guide member 11 , and a heat sink 15 is installed in the receiving groove 14 .

[0054] Reference Figure 6 The heat sink 15 protrudes from the receiving groove 14 and is designed in a wave shape, thereby increasing the heat dissipation area of ​​the vacuum tube 1 to a certain extent, improving the heat dissipation efficiency of the vacuum tube 1, and thus helping to reduce the heat accumulation inside the vacuum tube 1. In this embodiment, the heat sink 15 is made of a heat conductive material.

[0055] Reference Figure 4 and Figure 6 The number of the receiving grooves 14 is equal to the number of the guide members 11, and a heat sink 15 is installed in each receiving groove 14, thereby further improving the heat dissipation efficiency.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A transmission type X-ray tube, characterized in that: include: Vacuum tube (1); The cleaning mechanism (5) comprises a driving component (51) and a cleaning component (52), wherein the cleaning component (52) is arranged in the vacuum tube (1) and is in contact with the inner wall of the vacuum tube (1), and the driving component (51) is arranged on the vacuum tube (1) and is connected to the cleaning component (52), and the driving component (51) is used to drive the cleaning component (52) to move in the vacuum tube (1), so that the cleaning component (52) cleans the inner wall of the vacuum tube (1).

2. The transmission type X-ray tube according to claim 1, characterized in that: A cathode (2), an anode target (3) and a transmission window (4) are respectively arranged in the vacuum tube (1); the transmission window (4) is arranged opposite to the cathode (2); the anode target (3) is arranged on a side of the transmission window (4) close to the cathode (2); and the driving component (51) and the cleaning component (52) are respectively arranged close to the cathode (2).

3. The transmission type X-ray tube according to claim 1, characterized in that: The cleaning component (52) comprises a support ring (521) and an adsorption ring (522) arranged on the support ring (521); the support ring (521) is slidably arranged in the vacuum tube (1) and connected to the driving component (51); the adsorption ring (522) is in contact with the inner wall of the vacuum tube (1); and the driving component (51) is used to drive the support ring (521) to move in the vacuum tube (1).

4. The transmission type X-ray tube according to claim 3, characterized in that: A guide member (11) is provided on the inner wall of the vacuum tube (1) along its length direction, and guide grooves (523) are respectively provided on the support ring (521) and the adsorption ring (522), and the guide member (11) is slidably inserted in the guide grooves (523).

5. The transmission type X-ray tube according to claim 4, characterized in that: A plurality of the guide members (11) are provided, and the plurality of the guide members (11) are evenly distributed in the vacuum tube (1), and the number of the guide grooves (523) is equal to the number of the guide members (11) and are provided in a one-to-one correspondence.

6. The transmission type X-ray tube according to claim 4, characterized in that: An accommodating groove (14) is provided on the outer wall of the vacuum tube (1) at a position corresponding to the guide member (11), a heat sink (15) is arranged in the accommodating groove (14), and the heat sink (15) protrudes from the accommodating groove (14).

7. The transmission type X-ray tube according to claim 6, characterized in that: The heat sink (15) is designed to be wavy.

8. The transmission type X-ray tube according to claim 3, characterized in that: The vacuum tube (1) is provided with a sliding hole (12); the driving assembly (51) comprises a driving push rod (511) and a sealing telescopic sleeve (512); the driving push rod (511) is slidably arranged in the sliding hole (12) and is connected to the support ring (521); one end of the driving push rod (511) away from the support ring (521) extends out of the vacuum tube (1); the sealing telescopic sleeve (512) is respectively connected to the vacuum tube (1) and the support ring (521) and is sleeved on the driving push rod (511); and the sliding hole (12) is communicated with the sealing telescopic sleeve (512).

9. The transmission type X-ray tube according to claim 8, characterized in that: The driving push rod (511) comprises a first rod portion (5111) and a second rod portion (5112); the first rod portion (5111) passes through the sliding hole (12) and is connected to the support ring (521); an end of the first rod portion (5111) away from the support ring (521) is hinged to the second rod portion (5112); an end surface of the vacuum tube (1) close to the sliding hole (12) is provided with a clamping groove (13); when the sealing telescopic sleeve (512) is in a contracted state, the second rod portion (5112) can be inserted into the clamping groove (13).

10. The transmission type X-ray tube according to claim 9, characterized in that: A sealing gasket (131) is filled between the inner wall of the clamping groove (13) and the second rod portion (5112).

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