X-ray tube with high counting rate

Abstract

The utility model discloses a high-counting-rate X-ray tube, and the tube comprises a vacuum tube, one side of the vacuum tube is provided with an X-ray output port, and the X-ray output port protrudes outwards in the radial direction of the vacuum tube; the core column is arranged at the other end of the vacuum tube; a groove is formed in one side, facing the target material, of the core column; the lamp filament is arranged in the groove; and the target material is arranged at one end of the vacuum tube. According to the scheme, the efficiency of the X-ray tube can be improved, the dosage of the X-ray tube is reduced, and the service life of the X-ray tube is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of X-ray, in particular to a high counting rate X-ray tube. BACKGROUND

[0002] In the field of XF fluorescence detection, coating thickness measurement, food detection and industrial flaw detection, the X-ray tube is a key component to realize high-precision detection. In order to ensure the accuracy of detection, the X-ray tube usually needs to run in a long-time or uninterrupted working mode and needs to reach a certain dose of X-ray parameters. However, in the high-dose working mode, the X-ray tube itself will generate a large amount of heat. If the cooling is not timely and effective, the phenomena of target melting and X-ray tube bursting will occur, and the service life of the X-ray tube will be significantly shortened under the condition of long-term work at high temperature, which not only increases the maintenance cost of the equipment, but also causes economic losses to the customers.

[0003] At present, the X-ray tube is cooled by air cooling, water cooling and oil cooling. However, these traditional cooling methods often cannot meet the demand of rapid cooling in the high-dose working mode, especially in the case of long-time or uninterrupted work, the cooling effect is limited and the above problems cannot be effectively solved. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide a high counting rate X-ray tube.

[0005] To achieve the above purpose, embodiments of the present application provide a high counting rate X-ray tube, comprising:

[0006] A vacuum tube, one side of the vacuum tube is provided with an X-ray output port, the X-ray output port is raised outward along the radial direction of the vacuum tube;

[0007] A target material, the target material is arranged at one end of the vacuum tube;

[0008] A core column, the core column is arranged at the other end of the vacuum tube; a groove is formed on the side of the core column facing the target material;

[0009] A filament, the filament is arranged in the groove.

[0010] In one of the embodiments, the X-ray output port is a conical body or a hemispherical body.

[0011] In one of the embodiments, the target material comprises a copper target and a target surface; the target surface is welded to the end surface of the copper target; the center of the target surface is taken as the base point of the axial center of the copper target;

[0012] The copper target is sealingly connected with the vacuum tube.

[0013] In one of the embodiments, the end surface of the copper target welded with the target surface is arranged at an angle to the axial direction.

[0014] In one of the embodiments, the filament is made of tungsten.

[0015] In one of the embodiments, the filament is wound in a spiral manner.

[0016] Compared with the prior art, the high counting rate X-ray tube provided by the application can improve the efficiency of the X-ray tube, reduce the dose of the X-ray tube, and prolong the service life of the X-ray tube. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 A structure schematic diagram of the high counting rate X-ray tube in the embodiment of the application;

[0019] Figure 2 A front view of the vacuum tube in the high counting rate X-ray tube in the embodiment of the application;

[0020] Figure 3 A left view of the vacuum tube in the high counting rate X-ray tube in the embodiment of the application;

[0021] Figure 4 A top view of the core column in the high counting rate X-ray tube in the embodiment of the application;

[0022] Figure 5 A view in the direction of A-A. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments only constitute some of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0024] In the description of the application, it should be understood that the terms “center”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0025] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0027] Referring to Figure 1 , the embodiments of the present application provide a high counting rate X-ray tube, comprising:

[0028] A vacuum tube 1, one side of the vacuum tube 1 is provided with an X-ray output port 11, the X-ray output port 11 is raised outward along the radial direction of the vacuum tube 1;

[0029] A target material 4 is arranged at one end of the vacuum tube 1;

[0030] A core column 2 is arranged at the other end of the vacuum tube 1; the side of the core column 2 facing the target material 4 is provided with a groove 21;

[0031] A filament 3 is arranged in the groove 21.

[0032] Specifically, the vacuum tube 1 can adopt a glass shell, which is a hollow tube column. The vacuum tube 1 is used to carry the remaining components, sealing, bearing internal vacuum pressure and X-ray output.

[0033] As shown in Figure 2 , As shown in 3 , the X-ray output port 11 is arranged on one side of the vacuum tube 1 and is raised outward along the radial direction of the vacuum tube 1, which can make the path of X-ray output more in the vacuum state, thereby effectively improving the efficiency of the X-ray tube, reducing the dose of the X-ray tube, so that the heat generation of the X-ray tube is greatly relieved, the use efficiency of the X-ray is greatly improved, and the service life of the X-ray tube is prolonged. The X-ray output port 11 can be provided as a conical body or a hemispherical body. It can be understood that the size of the X-ray output port 11 is set according to actual requirements.

[0034] As part of the X-ray tube cathode, the core post 2 provides mechanical support for the filament 3, ensuring its stable position and shape under high-temperature operating conditions. It also focuses the electron beam emitted by the filament 3, enabling it to accurately bombard the target material 4. Furthermore, the core post 2 connects the filament 3 to the external circuitry, ensuring current can flow smoothly through the filament 3, heating it to its operating temperature and emitting electrons. Understandably, to maintain the high vacuum environment inside the X-ray tube, the seal between the core post 2 and the vacuum tube 1 needs to have excellent sealing properties. Also understandably, to conduct some of the heat generated by the filament 3 to the outside, aiding in heat dissipation and reducing the operating temperature of the X-ray tube, the core post 2 can be made of a material with good thermal conductivity.

[0035] like Figure 4 , Figure 5 As shown, the filament 3 is disposed in a groove 21 opened on the side of the core post 2 facing the target material 4. The filament 3 is heated to a high temperature by an electric current, thereby emitting electrons and generating an electron beam. The filament 3 can be made of tungsten wire and is wound in a spiral manner.

[0036] The target 4 is placed at one end of the vacuum tube 1 to withstand high temperature, electron beam and heat transfer.

[0037] In one embodiment, the target material 4 includes a copper target 41 and a target surface 42; the target surface 42 is welded to the end face of the copper target 41; the center of the target surface 42 is based on the axial center of the copper target 41; the copper target 41 is sealed to the vacuum tube 1.

[0038] Specifically, the target surface 42 is used to withstand high temperatures and electron beams, while the copper target 41 is used to support the target surface 42 and transfer the heat generated by the target surface 42 to the outside of the X-ray tube.

[0039] In one embodiment, the end face of the copper target 41 welding target surface 42 is angled to the axial direction to optimize X-ray reflection output. Specifically, this angle can be set according to actual needs, for example, 19°.

[0040] The manufacturing process of the high counting rate X-ray tube is as follows: the vacuum tube 1 is blow-formed twice in the forming manufacturing process, the first time is to blow-form a tube column with a preset diameter, and after annealing, the tube column is cut to a preset length, then the cut tube column is heated to 900 DEG C, and the second time is to blow-form at the X-ray output port 11, the shape and size of the X-ray output port 11 are adjusted according to actual requirements. The packaging of the X-ray tube is as follows: when the vacuum tube 1 is at about 900 DEG C, the target material 4 and the core column 2 provided with the filament 3 are respectively placed into the vacuum tube 1 through a tooling and are packaged, and when packaging, the distance and angle of the filament 3 and the target material 4 need to be adjusted according to requirements, the distance determines the final highest KV value of the X-ray tube, and the angle determines the direction and efficiency of the X-ray output. After annealing, the exhaust hole at one end of the vacuum tube 1 provided with the filament 3 is connected with a vacuum device and is vacuumized, and after the pressure of the vacuum tube 1 reaches 10 -4 ~10 -7 Pa, the vacuum tube 1 is heated to 900 DEG C and is sealed, thus the production of the X-ray tube is completed, and then the aging and testing links are carried out.

[0041] Embodiment 1

[0042] Fluorescent detection of gold, constant counting rate 30000, collimator 1.5MM, the original X-ray tube needs a dose of 45KV, 210UA, and the high counting rate X-ray tube of the application needs a dose of 45KV, 95UA to achieve the target of counting rate 30000.

[0043] Embodiment 2

[0044] Coating thickness measurement, collimator 1.5MM, the original X-ray tube needs a dose of 45KV, 800UA, and the high counting rate X-ray tube of the application needs a dose of 45KV, 385.6UA to achieve the same test effect.

[0045] Embodiment 3

[0046] Fluorescent detection of lead purity, constant counting rate 30000, collimator 1.5MM, the original X-ray tube needs a dose of 45KV, 190UA, and the high counting rate X-ray tube of the application needs a dose of 45KV, 90.3UA to achieve the target of counting rate 30000.

[0047] The high counting rate X-ray tube provided by the application can improve the efficiency of the X-ray tube, reduce the dose of the X-ray tube, and prolong the service life of the X-ray tube.

[0048] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high count rate X-ray tube, characterized in that, include: A vacuum tube (1) is provided with an X-ray output port (11) on one side, and the X-ray output port (11) protrudes outward along the radial direction of the vacuum tube (1); Target (4), the target (4) is disposed at one end of the vacuum tube (1); A core post (2) is disposed at the other end of the vacuum tube (1); a groove (21) is provided on the side of the core post (2) facing the target material (4); The filament (3) is disposed in the groove (21).

2. The high count rate X-ray tube according to claim 1, characterized in that, The X-ray output port (11) is a cone or a hemisphere.

3. The high count rate X-ray tube according to claim 1, characterized in that, The target material (4) includes a copper target (41) and a target surface (42); the target surface (42) is welded to the end face of the copper target (41); the center of the target surface (42) is based on the axial center of the copper target (41); The copper target (41) is sealed to the vacuum tube (1).

4. The high count rate X-ray tube according to claim 3, characterized in that, The copper target (41) is welded to the end face of the target surface (42) at an angle to the axial direction.

5. The high count rate X-ray tube according to claim 1, characterized in that, The filament (3) is made of tungsten wire.

6. The high count rate X-ray tube according to claim 1, characterized in that, The filament (3) is wound in a spiral manner.

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