X-ray generating device

Abstract

The utility model discloses an X-ray generating device, the X-ray generating device comprises a ray tube, a ray tube radiator and a fixing seat, the ray tube radiator is arranged at one end of the ray tube, is connected with one end of an anode in the ray tube, and is used for dissipating heat of the anode; a fixing hole is formed in the fixing seat, a connecting groove is formed in the side, deviating from the ray tube, of the ray tube radiator, a screwing piece penetrates through the fixing hole and is in threaded connection with the connecting groove, and a cavity is formed between the tail end of the screwing piece and the groove bottom of the connecting groove; an exhaust flow channel is formed between the hole wall of the fixing hole and the screw joint piece, and an exhaust flow channel is formed between the groove wall of the connecting groove and the screw joint piece; and the exhaust flow channel is communicated with the cavity and the outside. The X-ray generating device can solve the problem that breakdown is prone to occurring at the bolt connecting position.

Description

Technical Field

[0001] The utility model relates to the technical field of field emission, in particular to an X-ray generating device. Background Art

[0002] X-ray generating devices generally include an X-ray tube and a high-voltage generator. The high-voltage generator applies a high-voltage electric field to the positive and negative electrodes of the X-ray tube. The cathode filament is heated to generate electrons. The electrons move at high speed to the anode under the action of the electric field, thereby stimulating the generation of X-rays. Usually, the X-ray tube and the high-voltage generator need to be installed in a sealed box, and the box is filled with an insulating medium to provide a good insulating environment for the high-voltage electric field.

[0003] However, when the anode of the X-ray tube is fixed to the fixing base through the heat sink, it is usually fixed with bolts. Air will exist between the bolts and the holes and it is not easy to be eliminated, which makes it easy for air breakdown to occur at the connection, resulting in damage to the X-ray tube or failure of the generator. Utility Model Content

[0004] The main purpose of the utility model is to provide an X-ray generating device, aiming to solve the risk of breakdown of the X-ray generating device at the threaded connection.

[0005] To achieve the above-mentioned purpose, the X-ray generating device proposed in the utility model comprises a ray tube, a ray tube radiator and a fixing seat, wherein the ray tube radiator is arranged at one end of the ray tube and connected to one end of the anode in the ray tube to dissipate the heat of the anode;

[0006] The fixing seat is provided with a fixing hole, a connecting groove is provided on a side of the radiator of the radiator tube away from the radiator tube, a screw connection piece passes through the fixing hole and is threadedly connected to the connecting groove, and a cavity is formed between the tail end of the screw connection piece and the bottom of the connecting groove;

[0007] An exhaust flow channel is formed between the hole wall of the fixing hole and the screw connection piece, and between the groove wall of the connecting groove and the screw connection piece. The exhaust flow channel connects the cavity with the outside.

[0008] In a possible embodiment of the present invention, a first through hole is formed in the hole wall of the fixing hole, and a second through hole is formed in the groove side wall of the connecting groove. The first through hole and the second through hole are both extended along the axial direction of the screw connection, and the second through hole and the first through hole are connected to form the exhaust flow channel.

[0009] In a possible embodiment of the present invention, at least two first through holes are provided, and at least two second through holes are provided. At least two first through holes are spaced apart around the circumference of the fixing hole, and one second through hole is connected to one first through hole.

[0010] In a possible embodiment of the present utility model, two first through holes and two second through holes are provided. The two first through holes are arranged in a straight line around the circumferential side of the fixing hole, and the two second through holes are arranged in a straight line around the circumferential side of the connecting groove.

[0011] Alternatively, four first through holes and four second through holes are provided. The four first through holes are arranged in a cross shape around the circumferential side of the fixing hole, and the four second through holes are arranged in a cross shape around the circumferential side of the connecting groove.

[0012] In a possible embodiment of the present utility model, the dimension of the second through hole in the depth direction of the connecting groove is equal to the depth of the connecting groove.

[0013] And / or, the second through hole is a rectangular hole, the width of the second through hole extends along the circumferential direction of the connecting groove, and the ratio of the width of the second through hole to the perimeter of the groove side wall of the connecting groove is 1 / 6 - 1 / 4.

[0014] In a possible embodiment of the present utility model, the X-ray generating device further includes a gasket, which is clamped between the ray tube radiator and the fixing seat and sleeved on the screw member. A first avoidance groove is formed on the inner circumferential wall of the gasket, and the first avoidance groove communicates with the first through hole and the second through hole.

[0015] In a possible embodiment of the present utility model, the X-ray generating device further includes a spacer, which is clamped between the fixing seat and the head end of the screw member and sleeved on the screw member. A second avoidance groove is formed on the inner circumferential wall of the spacer, and the second avoidance groove communicates with the first through hole and the outside, or a part of the opening of the first through hole is exposed on the periphery of the spacer.

[0016] In a possible embodiment of the present utility model, the screw member includes a stud and a head end connected to the stud. A first groove is formed on the circumferential side of the stud, and the first groove extends along the extending direction of the stud. A second groove is formed on the end face of the head end facing the stud, and the first groove communicates with the second groove to jointly form at least part of the exhaust flow channel.

[0017] In a possible embodiment of the present utility model, the number of the first groove and the second groove is at least two. The two first grooves are arranged at intervals along the circumferential side of the stud, and the two second grooves are arranged at intervals along the circumferential side of the head end. One first groove corresponds to one second groove.

[0018] In a possible embodiment of the present utility model, the proportion of the size of the first groove in the circumferential direction of the stud to the circumference of the stud is 1 / 6 - 1 / 4.

[0019] The X-ray generating device of the technical solution of the present utility model includes an X-ray tube, an X-ray tube radiator, and a fixing base. The X-ray tube has a cathode and an anode inside. The X-ray tube radiator is provided at one end of the X-ray tube and is connected to one end of the anode inside the X-ray tube, for providing high voltage to the anode and dissipating heat. The fixing base is threadedly connected to the X-ray tube radiator through a screw connector, so as to fix the X-ray tube.

[0020] A cavity is formed between the tail end of the screw connector and the bottom of the connection groove; it is set that an exhaust flow channel is jointly formed between the pore wall of the fixing hole and the screw connector and between the groove wall of the connection groove and the screw connector. This exhaust flow channel communicates the cavity with the outside, and this outside is the inside of the box body of the high-voltage generator, so that the insulating medium can enter the cavity through this exhaust flow channel, discharge the gas from the cavity, and at the same time, it can also facilitate the air in the pores between the screw connector and the connection groove to converge into the exhaust flow channel and be discharged through the exhaust flow channel, greatly enhancing the insulation performance of the high-voltage end, ensuring the reliability of the high-voltage generator, reducing the risk of high-voltage breakdown, and prolonging the service life of the X-ray generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the X-ray generating device of the present utility model;

[0023] Figure 2 For Figure 1 The longitudinal sectional view of the X-ray generating device shown;

[0024] Figure 3 For Figure 1 The schematic structural diagram of the X-ray tube, the X-ray tube radiator, and the fixing base in the X-ray generating device shown;

[0025] Figure 4 For Figure 3 The transverse sectional view of the X-ray tube, the X-ray tube radiator, and the fixing base shown;

[0026] Figure 5 For Figure 1 The schematic structural diagram of the X-ray tube in the X-ray generating device shown in;

[0027] Figure 6 is Figure 5 the right view of an embodiment of the X-ray tube;

[0028] Figure 7 is Figure 5 the right view of another embodiment of the X-ray tube;

[0029] Figure 8 is a schematic structural view of an embodiment of the screw connection member in the X-ray generating device of the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100 - X-ray generating device, 10 - X-ray tube, 11 - anode, 12 - cathode, 13 - tube body, 14 - focusing cover body, 15 - anode cap, 20 - X-ray tube radiator, 21 - connecting groove, 211 - second through hole, 22 - cavity, 23 - heat dissipation hole, 30 - fixing seat, 31 - fixing hole, 311 - first through hole, 40 - screw connection member, 41 - stud, 411 - first groove, 42 - head end, 50 - gasket ring, 51 - first avoidance groove, 60 - gasket, 61 - second avoidance groove, 70 - high voltage generator, 71 - transformer, 72 - voltage boosting plate, 80 - box body.

[0032] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] The X-ray tube used to generate X-rays is generally fixed in the box of the high-voltage generator through a fixing seat. In order to ensure the insulation inside the box, the tube is generally evacuated and filled with an insulating medium, thereby ensuring the insulation of the high-voltage environment. However, a closed cavity will appear at the threaded connection between the fixing seat and the tube, and the air in the gap at the threaded connection is not easy to discharge, which may cause a risk of breakdown at this point, affecting the service life of the X-ray generating device. The utility model proposes an X-ray generating device, which aims to set an exhaust flow channel so that the insulating medium can enter the cavity and the connection gap through the exhaust flow channel, thereby discharging the gas and improving the insulation performance.

[0038] Please refer to Figure 1 , Figure 3 and Figure 4 In one embodiment of the utility model, an X-ray generating device 100 includes a ray tube 10, a ray tube heat sink 20 and a fixing seat 30, wherein the ray tube heat sink 20 is disposed at one end of the ray tube 10 and connected to one end of an anode 11 in the ray tube 10, and is used to dissipate the heat of the anode 11;

[0039] The fixing seat 30 is provided with a fixing hole 31, and the side of the X-ray tube heat sink 20 facing away from the X-ray tube 10 is provided with a connecting groove 21, a screw connection 40 passes through the fixing hole 31 and is threadedly connected to the connecting groove 21, and a cavity 22 is formed between the tail end of the screw connection 40 and the bottom of the connecting groove 21;

[0040] An exhaust flow channel is formed between the hole wall of the fixing hole 31 and the screw connector 40 , and between the groove wall of the connecting groove 21 and the screw connector 40 . The exhaust flow channel connects the cavity 22 with the outside.

[0041] Combination Figure 2 It can be understood that the X-ray generating device 100 also includes a high voltage generator 70 and a box 80 for accommodating the high voltage generator 70 and the ray tube 10. The high voltage generator 70 generally includes a transformer 71 and a booster plate 72, which are connected to generate high voltage. The box 10 is used to evacuate the ray tube and then fill it with an insulating medium. In this embodiment, the structure of the ray tube 10 can refer to the structure that can currently achieve the function of generating X-rays, and is not limited here. For example, in one example, the ray tube 10 includes a tube body 13 and a cathode 12 and an anode 11 arranged in the tube body 13. The tube body 13 is made of glass material, which has low cost, simple process and small size. The cathode 12 and the anode 11 are respectively fixed at both ends of the tube body 13, and high voltage power is applied to them respectively. The cathode 12 is heated to generate electrons, and the electrons move at high speed to the anode 11 under the action of the electric field, thereby exciting the generation of X-rays. Optionally, the outer periphery of the cathode 12 is covered with a focusing cover 14, which is fixed on the tube body 13 to enhance the protection of the cathode 12. The tail end of the cathode 12 is connected with a wire and electrically connected to the high-voltage generator 70 to access the high-voltage power supply. The end of the anode 11 used to receive electrons is covered with an anode cap 15, which can protect the target surface of the anode 11. The anode cap 15 has two corresponding perforations, one perforation allows electrons to enter the target surface of the anode 11, and the other perforation allows X-rays to be emitted, effectively preventing secondary electrons from damaging the tube body 13. Optionally, a beryllium window is provided in one of the perforations. The beryllium window is made of metal beryllium, which has low density, light weight, high rigidity, good thermal properties, and the beryllium window has a small shielding effect on X-rays, which is conducive to X-ray penetration.

[0042] The ray tube radiator 20 is connected to one end of the tube body 13 and to the anode 11 extending out of the tube body 13. It is used to connect a high voltage power supply and help the anode 11 dissipate heat, which is beneficial to extend the service life of the ray tube 10. Here, the ray tube radiator 20 can be an aluminum block, which has good thermal conductivity and can improve the heat dissipation efficiency. In other examples, the ray tube radiator 20 can also be other shapes, such as a heat sink structure. The connection method between the ray tube radiator 20 and the anode 11 can be vacuum welding to reduce the presence of pores. The ray tube radiator 20 is located outside the tube body 13, which is beneficial to heat dissipation. It is installed in the box 80 through a fixing seat 30. The fixing seat 30 can be a plate or a block. It can be fixed in the box 80 in a detachable manner or by welding, which is not limited here. The fixing seat 30 is attached to the side of the ray tube radiator 20 away from the anode 11 and is threadedly connected to the ray tube radiator 20.

[0043] Please refer to Figure 6 Optionally, the fixing base 30 is provided with a fixing hole 31, and the ray tube radiator 20 is provided with a connecting groove 21. The fixing hole 31 corresponds to the connecting groove 21, and a screwing member 40 is screwed into the fixing hole 31 to achieve threaded connection. Therefore, the inner wall of the connecting groove 21 is provided with internal threads. The screwing member 40 can be a bolt or a screw, which is not limited herein. A notch is provided at the head end of the screwing member 40 to facilitate the use of tools to screw it, thereby improving the disassembly and assembly efficiency. When the screwing member 40 is connected into the connecting groove 21, in order to improve the connection stability, there is a certain distance between the tail end of the screwing member 40 and the bottom of the connecting groove 21, thereby forming a cavity 22.

[0044] It can be understood that an exhaust flow channel is formed between the screwing member 40 and the inner wall of the fixing hole 31, and between the screwing member 40 and the inner wall of the connecting groove 21. The exhaust flow channel not only communicates the cavity 22 with the outside, that is, the space on the side of the fixing base 30 away from the ray tube radiator 20, but also can communicate the pores between the screwing member 40 and the inner wall of the fixing hole 31, and the pores between the screwing member 40 and the side wall of the connecting groove 21, so that the gas in all pores can be discharged. The exhaust flow channel can be linear or curved in its extending direction, which is not limited herein.

[0045] The X-ray generating device 100 of the technical solution of the present utility model includes a ray tube 10, a ray tube radiator 20 and a fixing base 30. The ray tube 10 has a cathode 12 and an anode 11 inside. The ray tube radiator 20 is arranged at one end of the ray tube 10 and is connected to one end of the anode 11 inside the ray tube 10 for providing high voltage and dissipating heat for the anode 11. The fixing base 30 is threadedly connected to the ray tube radiator 20 through a screwing member 40, thereby realizing the fixation of the ray tube 10.

[0046] A cavity 22 is formed between the tail end of the screwing member 40 and the bottom of the connecting groove 21; it is set that an exhaust flow channel is jointly formed between the inner wall of the fixing hole 31 and the screwing member 40, and between the inner wall of the connecting groove 21 and the screwing member 40. The exhaust flow channel communicates the cavity 22 with the outside, and the outside is the space inside the box body 80. Thus, the insulating medium can enter the cavity 22 through the exhaust flow channel to discharge the gas from the cavity 22. At the same time, it can also facilitate the air in the pores between the screwing member 40 and the connecting groove 21 to converge at the exhaust flow channel and be discharged through the exhaust flow channel, greatly enhancing the insulation performance of the high-voltage end, ensuring the reliability at the high-voltage generator 70, reducing the risk of high-voltage breakdown, and prolonging the service life of the X-ray generating device 100.

[0047] In addition, to improve the heat dissipation effect, the fixing base 30 is provided with heat dissipation holes 23 which penetrate through to the X-ray tube radiator 20 and form a blind hole structure, so that the X-ray tube radiator 20 has a larger heat dissipation area and the heat dissipation efficiency is improved. The number of the heat dissipation holes 23 can be multiple, and the multiple heat dissipation holes 23 are circumferentially arranged at intervals with the centers of the fixing holes 31 and the connecting grooves 21 as the centers.

[0048] Please continue to refer to Figure 4 , in a possible embodiment of the present utility model, a first through hole 311 is provided on the hole wall of the fixing hole 31, and a second through hole 211 is provided on the groove side wall of the connecting groove 21. Both the first through hole 311 and the second through hole 211 extend along the axial direction of the screw member 40, and the second through hole 211 and the first through hole 311 communicate with each other to jointly form the exhaust flow channel.

[0049] In this embodiment, a first through hole 311 is provided on the hole wall of the fixing hole 31. The first through hole 311 penetrates through in the thickness direction of the fixing base 30, that is, penetrates through in the direction from the fixing base 30 to the X-ray tube radiator 20, and one side hole wall of the first through hole is communicated with the hole wall of the fixing hole 31. It can also be understood that a groove structure is recessed on the hole wall of the fixing hole 31 in a direction away from its center. A second through hole 211 is provided on the groove side wall of the connecting groove 21. The second through hole 211 is arranged corresponding to the first through hole 311, which means that at least part of the opening of the first through hole 311 is opposite to at least part of the opening of the first through hole 311 so that the first through hole 311 communicates with the second through hole 211. The setting of the second through hole 211 is the same as that of the first through hole 311, except that the second through hole 211 does not penetrate through the X-ray tube radiator 20. The first through hole 311 and the second through hole 211 jointly form the exhaust flow channel. The setting of this structure can not only discharge air, but also increase the heat dissipation area of the X-ray tube radiator 20 and further improve the heat dissipation efficiency. At the same time, it can also be processed synchronously when processing the fixing base 30 and the X-ray tube radiator 20, which is simple, convenient and easy to process.

[0050] Optionally, the cross-sectional shape of the first through hole 311 can be circular, rectangular or polygonal, etc., which is not limited herein. The cross-sectional shape of the second through hole 211 can be the same as that of the first through hole 311 to improve the smoothness of the inflow of the insulating medium and the smoothness and efficiency of the air discharge. In other examples, the shape of the second through hole 211 can also be different from that of the first through hole 311.

[0051] Please refer to Figure 5 and Figure 6, in a possible embodiment of the present utility model, at least two first through holes 311 are provided, and at least two second through holes 211 are provided. The at least two first through holes 311 are arranged at intervals around the circumferential side of the fixing hole 31, and one second through hole 211 corresponds to and communicates with one first through hole 311.

[0052] In this embodiment, at least two exhaust channels are provided, and the at least two exhaust channels are arranged at intervals along the circumferential side of the screw member 40. When the insulating medium flows into one of them, air can flow out from the other exhaust channel, thereby improving the efficiency of exhausting air from the cavity 22 and the pores on the circumferential side of the screw member 40 and saving assembly time. Of course, when the insulating medium enters from both exhaust channels simultaneously, air can also flow out from both exhaust channels simultaneously, and in this way, the efficiency can also be improved.

[0053] Please refer to Figure 6 and Figure 7 , in a possible embodiment of the present utility model, two first through holes 311 and two second through holes 211 are provided. The two first through holes 311 are arranged in a straight line around the circumferential side of the fixing hole 31, and the two second through holes 211 are arranged in a straight line around the circumferential side of the connecting groove 21;

[0054] Or, four first through holes 311 and four second through holes 211 are provided. The four first through holes 311 are arranged in a cross shape around the circumferential side of the fixing hole 31, and the four second through holes 211 are arranged in a cross shape around the circumferential side of the connecting groove 21.

[0055] In this embodiment, two first through holes 311 and two second through holes 211 are provided, and the two first through holes 311 are arranged in a straight line, and the two second through holes 211 are also arranged in a straight line. That is, the cross-sectional shape of each first through hole 311 and second through hole 211 is approximately strip-shaped, for example, rectangular or oval, and the long side direction faces the radial direction, that is, it has a larger dimension in the radial direction of the screw member 40, so that while increasing the space of the exhaust channel, the influence on the hole wall of the fixing hole 31 and the groove side wall of the connecting groove 21 can be reduced, and the connection effect can be improved. At the same time, the two first through holes 311 are symmetrically arranged on the circumferential side of the fixing hole 31, and the two second through holes 211 are symmetrically arranged on the circumferential side of the connecting groove 21, which can improve the connection uniformity and exhaust uniformity.

[0056] In an alternative other embodiment, both the first through holes 311 and the second through holes 211 are provided with four. The four first through holes 311 are arranged in a cross shape around the circumferential side of the fixing hole 31, and the four second through holes 211 are arranged in a cross shape around the circumferential side of the connecting groove 21. In addition to having the above advantages, the exhaust passage of this example also increases in quantity, which can further improve the exhaust efficiency.

[0057] Of course, in yet another embodiment, the number of the first through holes 311 and the second through holes 211 can also be three or more than four, and the multiple first through holes 311 are evenly arranged on the circumferential side of the fixing hole 31, and the multiple second through holes 211 are arranged on the circumferential side of the connecting groove 21.

[0058] In a possible embodiment of the present utility model, the size of the second through hole 211 in the depth direction of the connecting groove 21 is equal to the depth of the connecting groove 21;

[0059] And / or, the second through hole 211 is a rectangular hole, the width of the second through hole 211 extends along the circumferential direction of the connecting groove 21, and the proportion of the width of the second through hole 211 in the perimeter of the groove side wall of the connecting groove 21 is 1 / 6 - 1 / 4.

[0060] In this embodiment, the depth of the second through hole 211, that is, the size in the depth direction of the connecting groove 21, is set to be the same as the depth of the connecting groove 21, so as to increase the space of the exhaust passage and accelerate the exhaust rate. In other examples, the depth of the second through hole 211 can be larger than the insertion depth of the tail end of the screw member 40 in the depth direction of the connecting groove 21.

[0061] On the basis of defining or not defining the depth of the second through hole 211, the shape of the second through hole 211 is set as a rectangle, and the proportion of the width dimension of the second through hole 211 in the perimeter of the groove side wall of the connecting groove 21 is 1 / 6 - 1 / 4, for example, 1 / 6, 11 / 60, 1 / 5, 13 / 60, 7 / 30, 1 / 4, etc., so as to improve the connection stability while increasing the exhaust space. This proportion is the size set when the second through hole 211 is one, and the sum of the overall sizes when the second through hole 211 is multiple. Optionally, the size of the first through hole 311 in the circumferential direction of the fixing hole 31 is also set to be the same as the size of the second through hole 211.

[0062] Please refer to Figure 4, in a possible embodiment of the present utility model, the X-ray generating device 100 further includes a gasket 50, the gasket 50 is clamped between the ray tube radiator 20 and the fixed seat 30, and is sleeved on the screw member 40. A first avoidance groove 51 is formed on the inner ring wall of the gasket 50, and the first avoidance groove 51 communicates with the first through hole 311 and the second through hole 211.

[0063] To improve the installation stability of the ray tube radiator 20, a gasket 50 is provided between the ray tube radiator 20 and the fixed seat 30. The gasket 50 can be made of a structure with certain elasticity, so that a continuous abutting effect can be maintained between the ray tube radiator 20 and the fixed seat 30, and buffering can be achieved, improving the connection stability and service performance of the ray tube 10. In this case, the gasket 50 is also annular, and a first avoidance groove 51 is formed on its inner wall. The shape of the first avoidance groove 51 can be the same as that of the first through hole 311 or the second through hole 211, and the size can also be the same as the sizes of the first through hole 311 and the second through hole 211, so as to increase the exhaust space and improve the exhaust efficiency. In other examples, the shape and size of the first avoidance groove 51 are not the same as those of the first through hole 311 and the second through hole 211, as long as the effect of connecting the two can be achieved.

[0064] In an optional embodiment, a limiting groove is formed on the surface of the fixed seat 30 facing the ray tube radiator 20. The gasket 50 is installed in the limiting groove and partially exposed from the limiting groove. When the ray tube radiator 20 and the fixed seat 30 are cooperatively connected, there is a certain gap between them, which is beneficial to the heat dissipation of the ray tube radiator 20 while improving the installation stability.

[0065] Please refer to Figure 4 , in a possible embodiment of the present utility model, the X-ray generating device 100 further includes a spacer 60, the spacer 60 is clamped between the fixed seat 30 and the head end of the screw member 40, and is sleeved on the screw member 40. A second avoidance groove 61 is formed on the inner ring wall of the spacer 60, and the second avoidance groove 61 communicates with the first through hole 311 and the outside, or, a part of the opening of the first through hole 311 is exposed on the periphery of the spacer 60.

[0066] In the above case, the setting of the gasket 60 can increase the contact area of ​​the screw connection 40 and provide a certain elastic force, thereby improving the connection stability. On the basis of setting the gasket 60, the gasket 60 is provided with a second avoidance groove 61. The gasket 60 is annular, and the second avoidance groove 61 is formed by the inner ring of the gasket 60 being recessed in a direction away from its center, so that the first through hole 311 can be exposed to the fixing seat 30, thereby connecting with the external space, improving the exhaust efficiency and the connection stability. In another example, the half size of the gasket 60 can also be set smaller than the size of the first through hole 311, that is, the opening part of the first through hole 311 is exposed to the gasket 60, so that the first through hole 311 can be connected with the outside without slotting or drilling on the gasket 60, which is simple and convenient, and reduces the processing steps.

[0067] Please combine Figure 8 In a possible embodiment of the utility model, the screw connection 40 includes a stud 41 and a head end 42 connected to the stud 41, a first groove 411 is provided on the circumferential side of the stud 41, the first groove 411 is extended along the extension direction of the stud 41, and a second groove is provided on the head end 42 toward the end surface of the stud 41, the first groove 411 is connected with the second groove to form at least part of the exhaust flow channel.

[0068] In the above case, it is not necessary to open slots on the hole wall of the fixing hole 31 and the groove wall of the connecting groove 21, but directly improve the screw connection 40, open a first groove 411 on the peripheral side of the stud 41, the first groove 411 is set along the axial direction of the stud 41, and a second groove is opened on the end face of the head end 42, the second groove passes through the edge of the head end 42, so that the groove wall of the first groove 411 and the hole wall of the fixing hole 31 and the groove wall of the connecting groove 21 and the groove wall of the second groove together form an exhaust flow channel, while realizing the rapid discharge of air in the cavity 22, the air in the pores of the threaded connection is also quickly discharged, so as to improve the insulation performance. The cross-sectional shape of the first groove 411 can be rectangular, circular or polygonal, etc., which is not limited here.

[0069] In an optional embodiment, a first through hole 311, a second through hole 211, a first groove 411 and a second groove may be provided at the same time. The first groove 411 is provided corresponding to the first through hole 311 and the second through hole 211, thereby further increasing the space of the exhaust flow channel and further improving the exhaust efficiency and insulation performance.

[0070] In a possible embodiment of the present utility model, the number of the first grooves 411 and the second grooves is at least two. The two first grooves 411 are arranged at intervals along the circumferential side of the stud 41, and the two second grooves are arranged at intervals along the circumferential side of the head end 42. One first groove 411 is arranged corresponding to one second groove.

[0071] In the above case, by increasing the number of the first grooves 411 and the second grooves, the space of the exhaust flow channel can be further increased, and the exhaust efficiency and insulation performance can be further improved. In an optional embodiment, the cross-sectional shape of the first groove 411 can also be strip-shaped, and the length direction of the strip-shaped structure is along the radial direction of the stud. The setting of the second groove is the same as that of the first groove 411. In this way, while increasing the space of the exhaust flow channel, the influence on the hole wall of the fixing hole 31 and the groove side wall of the connecting groove 21 can be reduced, and the connection effect can be improved. In an example, two first grooves 411 are arranged symmetrically on the circumferential side of the stud 41, and two second grooves are arranged symmetrically on the circumferential side of the head end 42, which can improve the connection uniformity and the exhaust uniformity.

[0072] In a possible embodiment of the present utility model, the ratio of the dimension of the first groove 411 in the circumferential direction of the stud 41 to the circumference of the stud 41 is 1 / 6 - 1 / 4.

[0073] It can be understood that the dimension of the first groove 411 in the circumferential direction of the stud 41 should not be too large or too small. Setting its ratio to the circumference of the stud 41 to be 1 / 6 - 1 / 4, for example, 1 / 6, 11 / 60, 1 / 5, 13 / 60, 7 / 30, 1 / 4. In this way, while meeting the space requirement of the exhaust flow channel, the thread connection stability of the threaded part 40 can be reduced.

[0074] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. An X-ray generating device, characterized in that: It comprises a ray tube, a ray tube radiator and a fixing seat, wherein the ray tube radiator is arranged at one end of the ray tube and connected to one end of an anode in the ray tube to dissipate the heat of the anode; The fixing seat is provided with a fixing hole, a connecting groove is provided on a side of the radiator of the radiator tube away from the radiator tube, a screw connection piece passes through the fixing hole and is threadedly connected to the connecting groove, and a cavity is formed between the tail end of the screw connection piece and the bottom of the connecting groove; An exhaust flow channel is formed between the hole wall of the fixing hole and the screw connection piece, and between the groove wall of the connecting groove and the screw connection piece. The exhaust flow channel connects the cavity with the outside.

2. The X-ray generating device according to claim 1, characterized in that: The hole wall of the fixing hole is provided with a first through hole, the groove side wall of the connecting groove is provided with a second through hole, the first through hole and the second through hole are both extended along the axial direction of the screw connection, and the second through hole and the first through hole are connected to form the exhaust flow channel.

3. The X-ray generating device according to claim 2, characterized in that: There are at least two first through holes, and at least two second through holes. At least two first through holes are spaced around the circumference of the fixing hole, and one second through hole is connected to one first through hole.

4. The X-ray generating device according to claim 3, characterized in that: There are two first through holes and two second through holes, the two first through holes are arranged in a straight line around the circumference of the fixing hole, and the two second through holes are arranged in a straight line around the circumference of the connecting groove; Alternatively, four of the first through holes and four of the second through holes are provided, the four first through holes are arranged in a cross shape around the circumference of the fixing hole, and the four second through holes are arranged in a cross shape around the circumference of the connecting groove.

5. The X-ray generating device according to claim 2, characterized in that: The dimension of the second through hole in the depth direction of the connecting groove is equal to the depth of the connecting groove; And / or, the second through hole is a rectangular hole, the width of the second through hole extends along the circumference of the connecting groove, and the ratio of the width of the second through hole to the circumference of the groove side wall of the connecting groove is 1 / 6-1 / 4.

6. The X-ray generating device according to claim 2, characterized in that: The X-ray generating device also includes a gasket ring, which is clamped between the ray tube heat sink and the fixing seat and sleeved on the screw connector. The inner ring wall of the gasket ring is provided with a first avoidance groove, and the first avoidance groove connects the first through hole and the second through hole.

7. The X-ray generating device according to claim 2, characterized in that: The X-ray generating device also includes a gasket, which is clamped between the fixing seat and the head end of the screw-in component and is sleeved on the screw-in component. The inner ring wall of the gasket is provided with a second avoidance groove, and the second avoidance groove connects the first through hole and the outside, or a part of the opening of the first through hole is exposed at the periphery of the gasket.

8. The X-ray generating device according to any one of claims 1 to 7, characterized in that: The screw connection includes a stud and a head end connected to the stud, a first groove is provided on the circumferential side of the stud, the first groove is extended along the extension direction of the stud, and a second groove is provided on the head end toward the end surface of the stud, the first groove is connected to the second groove to form at least a part of the exhaust flow channel.

9. The X-ray generating device according to claim 8, characterized in that: The number of the first groove and the second groove is at least two, two first grooves are arranged at intervals along the circumference of the stud, two second grooves are arranged at intervals along the circumference of the head end, and one first groove corresponds to one second groove.

10. The X-ray generating device according to claim 9, characterized in that: The ratio of the dimension of the first groove in the circumferential direction of the stud to the circumference of the stud is 1 / 6-1 / 4.

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