A focusing structure for use in X-ray tubes

Abstract

This utility model discloses a focusing structure for X-ray tubes, relating to the field of X-ray tube technology. The focusing structure includes a focusing electrode and a focusing cover for housing the focusing electrode. The focusing cover includes a cover body and an electron guide that bends inward at least twice along the circumferential edge of the end of the cover body and then extends horizontally. The electron guide is positioned directly opposite the focusing electrode, forming an electron guiding channel in the middle of the focusing cover that is directly opposite the focusing electrode. The electron guiding channel is used to guide the electrons emitted by the focusing electrode. When the focusing cover is placed on the focusing electrode, the end of the electron guide facing the focusing electrode and the side of the electron guide facing the cover body, respectively, form a hollow area between the electron guide and the focusing electrode and the cover body. This design can greatly reduce the overall weight of the X-ray tube, which is beneficial for gas release during X-ray tube operation, thereby improving the service life and stability of the X-ray tube.

Description

Technical Field

[0001] This utility model relates to the field of X-ray tube technology, specifically a focusing structure applied to X-ray tubes. Background Technology

[0002] An X-ray tube is the core device for generating X-rays. It uses a high-voltage electric field to accelerate electrons and bombard a target material, thereby stimulating the emission of X-rays.

[0003] Please refer to the instruction manual. Figure 6 The image shows an existing X-ray tube, which includes a focusing structure consisting of a focusing electrode 100b and a focusing mask 200b. According to... Figure 6 It is known that both the focusing electrode 100b and the focusing cover 200b are solid, and the focusing cover 200b has an electron guiding channel 300b in the middle facing the focusing electrode 100b. The electron guiding channel 300b can guide the electrons so that they can accurately bombard the target material to generate X-rays.

[0004] However, the existing focusing electrode 100b and focusing cover 200b are both made of solid material, which will result in a large overall weight of the X-ray tube, which is not conducive to the venting of the X-ray tube during operation, and thus reduces the service life and stability of the X-ray tube. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a focusing structure for X-ray tubes, so as to solve the technical problem that the existing focusing structures in the background art result in a large overall weight of the X-ray tube, which is not conducive to the venting of the X-ray tube during operation, thereby reducing the service life and stability of the X-ray tube.

[0006] This invention provides a focusing structure for use in an X-ray tube. The focusing structure includes a focusing electrode and a focusing cover for covering the focusing electrode. The focusing cover includes a cover body and an electron guide that bends inward at least twice along the circumferential edge of the end of the cover body and then extends horizontally. The electron guide is positioned directly opposite the focusing electrode, thereby forming an electron guiding channel in the middle of the focusing cover that is directly opposite the focusing electrode. The electron guiding channel is used to guide the electrons emitted by the focusing electrode. When the focusing cover is placed over the focusing electrode, the end of the electronic guide facing the focusing electrode and the side of the electronic guide facing the cover body respectively form a hollow area between the focusing electrode and the cover body.

[0007] Furthermore, the cover and the electronic guide are integrally formed.

[0008] Furthermore, the electronic guide includes a first bent portion, a second bent portion, and a horizontal portion; The first bend, the second bend, and the horizontal portion are connected in sequence, wherein the end of the first bend away from the second bend is connected to the cover.

[0009] Furthermore, the focusing electrode is provided with multiple mounting through holes.

[0010] Furthermore, the plurality of the assembly through holes are circumferentially spaced with the center of the focusing electrode as the origin.

[0011] Furthermore, the X-ray tube also includes a ceramic column, a nickel tube, a tungsten filament, and a molybdenum rod.

[0012] Furthermore, the ceramic column, the nickel tube, the tungsten filament, and the molybdenum rod are all disposed on the focusing electrode.

[0013] Furthermore, there are two of each of the ceramic column, the nickel tube, and the molybdenum rod, and the two molybdenum rods are connected by a tungsten filament.

[0014] Furthermore, the electronic guidance channel includes a horizontal sub-channel and an inclined sub-channel, the size of which extends from one end near the horizontal sub-channel to the other end in an increasing manner.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In the focusing structure of the X-ray tube of this utility model, the focusing hood shown in this application includes a hood body and an electronic guide that is bent inward at least twice along the circumferential edge of the end of the hood body and then extends horizontally. When the focusing hood is placed on the focusing electrode, the ends of the electronic guides facing the focusing electrode and the sides of the electronic guides facing the hood body, respectively, form hollow areas between the focusing electrode and the hood body. Compared with the solid construction of the focusing hood of the X-ray tube in the prior art, this application can greatly reduce the overall weight of the X-ray tube by forming hollow areas inside the focusing hood, which is beneficial to the gas release of the X-ray tube during operation, thereby improving the service life and stability of the X-ray tube. Attached Figure Description

[0016] Figure 1 This is a front view of the focusing structure applied to an X-ray tube in one embodiment of the present invention; Figure 2 for Figure 1 A three-dimensional sectional view of AA; Figure 3 for Figure 1 Sectional view of AA; Figure 4 for Figure 3 Enlarged view of section A in the middle; Figure 5 for Figure 1 Sectional view of BB; Figure 6 This is a schematic diagram of a focusing structure in the prior art; Figure 7 This is a schematic diagram illustrating the imaging quality using a focusing structure in existing technologies. Figure 8 This is a schematic diagram of the imaging quality of the focusing structure in this application.

[0017] In the diagram: 100a, focusing electrode; 200a, focusing cover; 210, cover body; 220, electronic guide; 221, first bend; 222, second bend; 223, horizontal section; 300a, electronic guide channel; 310, horizontal sub-channel; 320, inclined sub-channel; 400, assembly through hole; 500, ceramic pillar; 600, nickel tube; 700, tungsten filament; 800, molybdenum rod; 100b, focusing electrode; 200b, focusing cover; 300b, electronic guide channel. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please refer to Figure 6, which shows the focusing structure of an X-ray tube in the prior art. Figure 6It is known that both the existing focusing electrode 100b and focusing cover 200b are solid, and the focusing cover 200b has an electron guiding channel 300b in the middle facing the focusing electrode 100b. The electron guiding channel 300b can guide the electrons so that the electrons can accurately bombard the target material to excite X-rays.

[0022] Example Please see Figures 1-5 The image shows a focusing structure applied to an X-ray tube in one embodiment of the present invention. The focusing structure includes a focusing electrode 100a and a focusing cover 200a for covering the focusing electrode 100a. The focusing cover 200a includes a cover body 210 and an electron guide 220 that extends horizontally after being bent inward at least twice along the circumferential edge of the end of the cover body 210. The electron guide 220 is positioned directly opposite the focusing electrode 100a, thereby forming an electron guiding channel 300a in the middle of the focusing cover 200a, which is positioned directly opposite the focusing electrode 100a. The electron guiding channel 300a is used to guide the electrons emitted by the focusing electrode 100a. When the focusing cover 200a is placed on the focusing electrode 100a, the end of the electronic guide 220 facing the focusing electrode 100a and the side of the electronic guide 220 facing the cover 210 form a hollow area between the focusing electrode 100a and the cover 210, respectively.

[0023] In specific implementation, the focusing hood 200a shown in this application includes a hood body 210 and an electronic guide 220 that extends horizontally after being bent inward at least twice along the circumferential edge of the end of the hood body 210. When the focusing hood 200a is placed on the focusing electrode 100a, the end of the electronic guide 220 facing the focusing electrode 100a and the side of the electronic guide 220 facing the hood body 210 respectively form a hollow area between the focusing electrode 100a and the hood body 210. Compared with the solid structure of the focusing hood 200b of the X-ray tube in the prior art, this application can greatly reduce the overall weight of the X-ray tube by forming a hollow area inside the focusing hood 200a, which is beneficial to the gas release of the X-ray tube during operation, thereby improving the service life and stability of the X-ray tube.

[0024] To further demonstrate that designing the focusing cover 200a as a hollow area in this application does not affect the performance of the X-ray tube, please refer to [link to relevant documentation]. Figure 7 and Figure 8 As shown, Figure 7 This is a diagram illustrating the effect of using an existing X-ray tube. Figure 8 To utilize the X-ray tube usage diagram in this application, through... Figure 7 and Figure 8The comparison shows that the focal spot change of the X-ray tube in the prior art and the focal spot change of the X-ray tube in this application are both within 5%-10%, which does not affect the final imaging quality.

[0025] It should be further noted that in this application, the cover 210 and the electronic guide 220 are integrally formed, and the electronic guide 220 includes a first bending portion 221, a second bending portion 222 and a horizontal portion 223. The first bending portion 221, the second bending portion 222 and the horizontal portion 223 are connected in sequence, wherein the end of the first bending portion 221 away from the second bending portion 222 is connected to the cover 210.

[0026] In addition, in this application, the electronic guide channel 300a includes a horizontal sub-channel 310 and an inclined sub-channel 320, the size of which extends from one end near the horizontal sub-channel 310 to the other end in an increasing manner.

[0027] To further reduce the overall weight of the X-ray tube, in this application, the focusing electrode 100a is provided with a plurality of mounting through holes 400, and the plurality of mounting through holes 400 are circumferentially spaced with the center of the focusing electrode 100a as the origin. The mounting through holes 400 can reduce the overall weight of the X-ray tube, and in subsequent processing, the focusing electrode 100a can be mounted on a fixture for subsequent assembly.

[0028] It should be noted that, in some preferred embodiments, the X-ray tube further includes a ceramic column 500, a nickel tube 600, a tungsten filament 700, and a molybdenum rod 800, and the ceramic column 500, nickel tube 600, tungsten filament 700, and molybdenum rod 800 are all disposed on the focusing electrode 100a. Specifically, there are two ceramic columns 500, nickel tube 600, and molybdenum rods 800, and the two molybdenum rods 800 are connected by a tungsten filament 700.

[0029] In summary, the focusing structure of this utility model applied to an X-ray tube has at least the following advantages compared to existing X-ray tube focusing structures: In the focusing structure of the X-ray tube of this utility model, the focusing hood 200a shown in this application includes a hood body 210 and an electronic guide 220 that extends horizontally after being bent inward at least twice along the circumferential edge of the end of the hood body 210. When the focusing hood 200a is placed on the focusing electrode 100a, the end of the electronic guide 220 facing the focusing electrode 100a and the side of the electronic guide 220 facing the hood body 210 respectively form a hollow area between the electronic guide 220 and the focusing electrode 100a and the hood body 210. Compared with the solid structure of the focusing hood 200b of the X-ray tube in the prior art, this application can greatly reduce the overall weight of the X-ray tube by forming a hollow area inside the focusing hood 200a, which is beneficial to the gas release of the X-ray tube during operation, thereby improving the service life and stability of the X-ray tube.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A focusing structure applied to an X-ray tube, the focusing structure comprising a focusing anode and a focusing shield for shielding the focusing anode, characterized in that, The focusing cover includes a cover body and an electron guide that bends inward at least twice along the circumferential edge of the end of the cover body and then extends horizontally. The electron guide is positioned directly opposite the focusing electrode, thereby forming an electron guiding channel in the middle of the focusing cover that is directly opposite the focusing electrode. The electron guiding channel is used to guide the electrons emitted by the focusing electrode. When the focusing cover is placed over the focusing electrode, the end of the electronic guide facing the focusing electrode and the side of the electronic guide facing the cover body respectively form a hollow area between the focusing electrode and the cover body.

2. The focusing structure applied to an X-ray tube according to claim 1, characterized in that: The cover and the electronic guide are integrally formed.

3. The focusing structure for an X-ray tube according to claim 1, characterized in that: The electronic guide includes a first bend, a second bend, and a horizontal section; The first bend, the second bend, and the horizontal portion are connected in sequence, wherein the end of the first bend away from the second bend is connected to the cover.

4. The focusing structure for an X-ray tube according to claim 1, characterized in that: The focusing electrode is provided with multiple mounting through holes.

5. The focusing structure for an X-ray tube according to claim 4, characterized in that: The plurality of assembly through holes are circumferentially spaced with the center of the focusing electrode as the origin.

6. The focusing structure for an X-ray tube according to claim 1, characterized in that: The X-ray tube also includes a ceramic column, a nickel tube, a tungsten filament, and a molybdenum rod.

7. The focusing structure for an X-ray tube according to claim 6, characterized in that: The ceramic column, the nickel tube, the tungsten filament, and the molybdenum rod are all located on the focusing electrode.

8. The focusing structure for an X-ray tube according to claim 6, characterized in that: There are two of each of the ceramic column, the nickel tube, and the molybdenum rod, and the two molybdenum rods are connected by a tungsten filament.

9. The focusing structure for an X-ray tube according to claim 1, characterized in that: The electronic guidance channel includes a horizontal sub-channel and an inclined sub-channel, the size of which extends from one end near the horizontal sub-channel to the other end in an increasing manner.

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