Dual Window Stress Analysis Metal Ceramic X-Ray Tube

Abstract

A double-window stress analysis metal ceramic X-ray tube, composed of a cooling water circulation component, an outer tube, a protective lead sleeve, an inner tube, a cathode part, an anode part and a top cover. The lower end of the inner tube is welded to the lower end of the cathode part, and the upper end of the inner tube is welded to the lower end of the anode part to form a closed vacuum. A protective lead sleeve is installed on the outer wall of the inner tube, and an outer tube is installed outside the protective lead sleeve. The lower end of the outer tube is connected to the cooling water circulation component, and a top cover is installed on the top of the X-ray tube, which is fixed to the outer tube by screws. The X-ray tube has two vertical ray windows, which can form a point focus and a line focus at the same time. The tube voltage is as high as 250kV to achieve the purpose of comprehensive stress analysis. The utility model adopts water cooling, and the cooling water flows into the inside of the anode assembly directly to the target bottom, which has a better cooling effect, so that the anode temperature of the X-ray tube is always kept within a certain temperature limit during operation, and it will not heat up even if it works continuously.

Description

Technical Field

[0001] The utility model relates to an X-ray tube, in particular to a double-window stress analysis metal ceramic X-ray tube. Background Art

[0002] In the process of producing, handling or processing materials, internal stress will inevitably be generated due to uneven plastic deformation in local areas of the material. Residual stress will bring many side effects, such as cracking, warping or changes in device size of processed components. Therefore, it is extremely important to analyze the residual stress of dangerous points related to the failure of mechanical parts and components. There are many ways to test residual stress, among which X-ray diffraction is the most common. Traditional X-ray analysis tubes not only have low voltage but also mostly have single focus, so the detection effect is relatively simple and cannot fully meet the test requirements of stress analysis. Summary of the invention

[0003] In view of the above problems, the utility model provides a double-window stress analysis metal ceramic X-ray tube which can form both a point focus and a line focus and has a maximum voltage of 250 kV.

[0004] The technical measures taken to solve the above technical problems are:

[0005] A double-window stress analysis metal ceramic X-ray tube, characterized in that: an inner cylinder 4 is provided on the double-window metal ceramic X-ray tube, the lower end of the inner cylinder 4 is welded to the lower end of a cathode part 5, the upper end of the inner cylinder 4 is welded to the lower end of an anode part 6 to form a closed vacuum, a protective lead sleeve 3 is provided on the outer wall of the inner cylinder 4, an outer cylinder 2 is provided outside the protective lead sleeve 3, the lower end of the outer cylinder 2 is connected to a cooling water circulation component 1, and a top cover 7 is provided on the top of the X-ray tube and fixed to the outer cylinder 2 by screws;

[0006] The cathode part 5 is composed of a flange 51, a ceramic cone 52, a fixed ceramic disk 53, an electrode needle 54, a sleeve 55, a cathode head 56, a molybdenum rod 57, a filament 58, and a cathode sleeve 59. The lower part of the ceramic cone 52 is connected to the flange 51 by brazing, and the upper part of the ceramic cone 52 is connected to the sleeve 55 by brazing. The sleeve 55 is equipped with a fixed ceramic disk 53, and the fixed ceramic disk 53 is equipped with an electrode needle 54, which are connected together by brazing. The cathode head 56 is brazed to the top of the sleeve 55, and a molybdenum rod 57 is installed on the cathode head 56. The filament 58 is connected to the molybdenum rod 57, and the cathode sleeve 59 is installed at the uppermost end of the cathode part 5.

[0007] The anode part 6 is composed of a transition ring 61, a transition section 62, a cooling water joint 63, an anode body 64, a line focus window 65, an anode target 66, and a point focus window 67. The lower end of the anode body 64 is brazed with the transition section 62. The bottom of the transition section 62 is equipped with a transition ring 61. Cooling water joints 63 are installed on both sides below the anode body 64. Two mutually perpendicular windows, namely the line focus window 65 and the point focus window 67, are installed in the middle position of the anode body 64. The anode target 66 is brazed inside the anode body 64.

[0008] Positive effects of the utility model: The double-window metal ceramic X-ray tube in the utility model uses a double-window layout scheme on the basis of the traditional single-focus X-ray tube. By adding a ray window perpendicular to the filament direction, a new X-ray stress analysis tube that combines point focus and line focus is realized. The tube voltage can reach up to 250kV, and the tube voltage level is also the first in this type of X-ray device. The point focus has a very strong resolving power, and the line focus can greatly shorten the exposure time, so that the stress analysis of material components can be more comprehensive. The utility model adopts water cooling, and the cooling water passes through the outer wall of the inner tube to the inside of the anode assembly and directly reaches the bottom of the target. The cooling effect is better, so that the anode temperature of the X-ray tube is always kept within a certain temperature limit during operation, and it will not heat up even if it works continuously, thereby increasing the continuous working time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a cross-sectional view of the cathode part of the utility model;

[0011] Figure 3 It is a cross-sectional view of the anode part of the utility model;

[0012] Figure 4 It is a schematic diagram of two window parts of the utility model;

[0013] Figure 5 for Figure 4 AA direction cross-sectional view. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with the accompanying drawings.

[0015] A double-window stress analysis metal ceramic X-ray tube, the internal structure of which is shown in cross-section. Figure 1As shown, an inner cylinder 4 is provided on the double-window metal ceramic X-ray tube, the lower end of the inner cylinder 4 is welded to the lower end of the cathode part 5, and the upper end of the inner cylinder 4 is welded to the lower end of the anode part 6, thereby forming a closed vacuum. A protective lead sleeve 3 is provided on the outer wall of the inner cylinder 4, an outer cylinder 2 is provided outside the protective lead sleeve 3, the lower end of the outer cylinder 2 is connected to the cooling water circulation component 1, and a top cover 7 is provided on the top of the X-ray tube, which is fixed to the outer cylinder 2 by screws.

[0016] Figure 2 : This is a cross-sectional view of the cathode part of the utility model. The cathode part 5 is composed of a flange 51, a ceramic cone 52, a fixed ceramic disk 53, an electrode needle 54, a sleeve 55, a cathode head 56, a molybdenum rod 57, a filament 58, and a cathode sleeve 59. The lower part of the ceramic cone 52 is connected to the flange 51 by brazing, and the upper part of the ceramic cone 52 is connected to the sleeve 55 by brazing. The sleeve 55 is equipped with a fixed ceramic disk 53, and the fixed ceramic disk 53 is equipped with an electrode needle 54, which are connected together by brazing. The cathode head 56 is brazed to the top of the sleeve 55, and a molybdenum rod 57 is installed on the cathode head 56. The filament 58 is connected to the molybdenum rod 57, and a cathode sleeve 59 is installed at the uppermost end of the cathode part.

[0017] Figure 3 The figure is a cross-sectional view of the anode part of the utility model, and the anode part is composed of a transition ring 61, a transition section 62, a cooling water joint 63, an anode body 64, a line focus window 65, an anode target 66, and a point focus window 67. The lower end of the anode body 64 is brazed with the transition section 62, the bottom of the transition section 62 is provided with a transition ring 61, cooling water joints 63 are provided on both sides below the anode body 64, two mutually perpendicular windows are provided in the middle position of the anode body 64, which are a line focus window 65 and a point focus window 67, and the anode target 66 is brazed inside the anode body 64.

[0018] Figure 4 It is a schematic diagram of two window parts of the present invention, from Figure 4 The position relationship of the two windows can be clearly seen, the point focus window and the line focus window are perpendicular to each other.

[0019] Figure 5 for Figure 4 AA direction section view. Figure 4 It can be seen from the AA direction that the line focus window 65 and the point focus window 67 are vertically distributed. After the filament 58 is powered on, the emitted electrons are reflected by the anode target 66, and the generated X-rays are emitted from the point focus window 67 to form a point focus. The generated X-rays are emitted from the line focus window 65 to form a line focus.

[0020] When the utility model is working, when the filament 58 passes enough current to generate an electron cloud, and when enough voltage is applied between the cathode part 5 and the anode part 6, the electron cloud is pulled toward the anode part 5. At this time, the electrons hit the anode target 66 in a high-energy and high-speed state. When the high-speed electrons reach the target surface, their movement is suddenly stopped. A small part of their kinetic energy, about only 1%, is converted into radiation energy and emitted in the form of X-rays, emitted from the point focus window 67 to form a point focus, and emitted from the line focus window 65 to form a line focus. The remaining 99% of the electron kinetic energy is converted into heat energy, so a good cooling structure is required to prevent the target from melting. When the cooling system of the utility model is working, cooling water enters from the inlet of the cooling water circulation component 1, adheres to the outer wall of the inner tube 4, enters the interior of the anode body 64 through the cooling water joint 63, and then flows into the bottom of the anode target 66 to complete the cooling of the X-ray tube, so that the anode temperature of the X-ray tube is always kept within a certain temperature limit during operation, and will not heat up even if it works continuously.

Claims

1. A double-window stress analysis metal ceramic X-ray tube, characterized in that: An inner tube (4) is provided on the double-window metal ceramic X-ray tube, the lower end of the inner tube (4) is welded to the lower end of the cathode part (5), the upper end of the inner tube (4) is welded to the lower end of the anode part (6), a protective lead sleeve (3) is provided on the outer wall of the inner tube (4), an outer tube (2) is provided outside the protective lead sleeve (3), the lower end of the outer tube (2) is connected to the cooling water circulation component (1), and a top cover (7) is provided on the top of the X-ray tube and fixed to the outer tube (2) by screws; The cathode part (5) is composed of a flange (51), a ceramic cone (52), a fixed ceramic disk (53), an electrode needle (54), a sleeve (55), a cathode head (56), a molybdenum rod (57), a filament (58), and a cathode sleeve (59). The lower part of the ceramic cone (52) is connected to the flange (51) by brazing, and the upper part of the ceramic cone (52) is connected to the sleeve (55) by brazing. The sleeve (55) is provided with a fixed ceramic disk (53), and the fixed ceramic disk (53) is provided with an electrode needle (54), which are connected together by brazing. The cathode head (56) is brazed to the top end of the sleeve (55), and a molybdenum rod (57) is provided on the cathode head (56). The filament (58) is connected to the molybdenum rod (57), and the cathode sleeve (59) is provided at the uppermost end of the cathode part. The anode part (6) is composed of a transition ring (61), a transition section (62), a cooling water joint (63), an anode body (64), a line focus window (65), an anode target (66), and a point focus window (67). The lower end of the anode body (64) is brazed to the transition section (62). The bottom of the transition section (62) is provided with a transition ring (61). Cooling water joints (63) are provided on both sides below the anode body (64). Two mutually perpendicular windows, namely the line focus window (65) and the point focus window (67), are provided in the middle of the anode body (64). The anode target (66) is brazed inside the anode body (64).

Images