CN214898323U

CN214898323U - X-ray tube

Info

Publication number: CN214898323U
Application number: CN202121659290.2U
Authority: CN
Inventors: 聂西鹏; 刘灿彬; 周奇
Original assignee: Siemens X Ray Vacuum Technology Ltd
Current assignee: Siemens X Ray Vacuum Technology Ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-11-26
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to an X-ray tube, include: the X-ray diagnosis device comprises a waist hoop (1), wherein a window (4) is formed in the peripheral wall of the waist hoop (1), and the window (4) is used for enabling X-rays to pass through; the cathode part (2) and the anode part (3), wherein the cathode part (2) and the anode part (3) are respectively and fixedly connected to the two ends of the waist hoop (1) in the axial direction; and a heat dissipation assembly through which insulating oil flows, the heat dissipation assembly being configured such that the insulating oil flows through the periphery of the window (4). The utility model discloses an X-ray tube through increased radiator unit and oil circulation around the window, can reduce the window regional temperature of brazing high-efficiently to the probability of brazing regional leading to the vacuum to reveal because of the heat altered shape has been reduced.

Description

X-ray tube

Technical Field

The utility model relates to an X-ray tube specifically relates to medical X-ray tube's window heat radiation structure's design.

Background

The structure of a typical medical rotary anode X-ray tube core is generally composed of an anode, a cathode and an intermediate waist hoop to form a vacuum sealed shell. The design of the middle waist hoop adopts different materials according to the type and the design power of the X-ray tube. The entire core may be of glass or ceramic construction in a low power X-ray tube waistband. The waist hoop design made of metal is generally adopted in the medical CT tube or other high-power X-ray tubes.

And the filament fixed at the cathode end of the sealed shell is excited to overflow under the electrifying current to form an electron cloud. After being accelerated by a high-voltage electric field which is loaded between the cathode and the anode and is as high as 40kV to 150kV (+ -20 kV to +/-75 kV), high-speed electrons bombard and are fixed on a target disc at the anode end of the sealed shell, so that characteristic radiation and bremsstrahlung radiation are caused, and X rays are generated. The generated X-rays exit to the outside of the tube through a ray window on a waist band of the X-ray tube. The window is typically made of a hard X-ray transparent metal material, such as beryllium and beryllium alloys or titanium and titanium alloys. The window is generally welded, for example, by a brazing process, to the waist band.

The window position will be subjected to X-rays for a long time during use and also to bombardment by secondary and other scattered electrons. Under these actions, the temperature at the window is usually much higher than other areas on the waist band, so that under the use condition of alternating heat load, due to the thermal stress generated by the temperature difference between the surface and the inner layer, the welding part of the window or the exit window per se is prone to generate undesirable material deformation, denaturation, cracks or blackening, and the like, thereby causing the X-ray tube to fail due to vacuum leakage.

At present, in order to improve the failure of the radiation window caused by high-temperature deformation, different designs and methods are provided for various manufacturers. For example, 1) a heat sink is fixed around the window, such as an X-ray tube with a heat sink window disclosed in CN211238152U, which has a plurality of heat sinks (heat sinks) uniformly distributed around the irradiation region (window region) to reduce the temperature of the window; 2) a shield design is added at the window, such as the high-energy X-ray tube disclosed in CN 205959947U: the sealed shell is provided with a ray outlet window, the inner side surface of the sealed shell corresponding to the ray outlet window is provided with a shielding window which at least can cover the ray outlet window, and the shielding window is made of a hard X-ray permeable material.

However, despite the various approaches described above, vacuum leakage through the window and window weld area remains one of the major failures of X-ray tubes due to the lack of heat dissipation capability of these window areas in the prior art. It is therefore a valuable task to achieve high efficiency in reducing window failures with a more optimal design.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an X-ray tube with novel ray goes out window design reduces the temperature of ray window department through increase oil cooling pipeline design all around at the window brazing to reduce metal tube shell and take place the probability of warping or fracture gas leakage in window department of brazing. According to an aspect of the present invention, there is provided an X-ray tube including: the outer peripheral wall of the waist hoop is provided with a window, and the window is used for enabling X-rays to pass through; the cathode part and the anode part are respectively and fixedly connected to two ends of the waist hoop in the axial direction; and a heat dissipation assembly through which the insulating oil flows, the heat dissipation assembly being configured such that the insulating oil flows through a periphery of the window.

In this way, by flowing the insulating oil through the heat dissipating assembly at the periphery of the window, heat can be more efficiently conducted away from the brazed portion of the window, and dissipated through the increased surface area, so that the brazed portion of the window can be protected from overheating.

Further, the heat radiating assembly includes a heat radiating pipe extending along a periphery of the window to be disposed on the outer circumferential wall of the waist band, the heat radiating pipe has an inlet and an outlet, and the insulating oil can flow through the heat radiating pipe through the inlet and the outlet.

In this way, by circulating the insulating oil through the radiating pipe, heat can be better taken away from the brazing site, and the cooled insulating oil is continuously supplied to the brazing site, so that the brazing site can be efficiently cooled.

Further, the heat radiating pipe is made of copper alloy.

In this way, the heat from the brazing portion of the window can be better dissipated by using the copper alloy with high heat dissipation rate.

Further, the radiating pipe is of a flat pipeline structure.

In this way, the radiating pipe can be closely attached at the brazing site around the window, thereby more facilitating heat conduction generated at the brazing site to the radiating pipe.

Further, the heat radiating pipe is mechanically fixed or mechanically welded to the periphery of the window.

In this way, the radiating pipe can be further closely attached at the brazing site around the window, thereby facilitating heat conduction from the brazing site to the radiating pipe.

Further, the inlet and the outlet face in the same direction or in opposite directions.

In this way, the inlet and the outlet are directed in the same direction, enabling a more compact layout, and thus miniaturization of the heat dissipation system; and the inlet and the outlet face opposite directions to separate the flow path of the hot insulating oil from the flow path of the cold insulating oil, so that the heat transfer of the flowing-out hot insulating oil to the flowing-in cold insulating oil is avoided, and the cooling efficiency is further improved.

Further, the inlet and the outlet are disposed along an axial direction of the waist band or perpendicular to the axial direction.

In this way, the inlet and the outlet are arranged along the axial direction of the waist band or perpendicular to the axial direction, and a more regular layout can be realized, thereby making the installation of the radiating pipe easier.

Further, the radiating pipe extends around the periphery of the window to form a one-turn structure or a multi-turn structure.

In this way, by providing the radiating pipe in a one-turn structure or a multi-turn structure, the number of radiating pipes can be configured as desired, so that design flexibility is higher.

Further, the radiating pipe extends around the periphery of the window to form a multi-turn structure, the multi-turn structure comprises a plurality of parallel pipe sections which are arranged in a nested manner in a tiled mode, and adjacent parallel pipe sections are connected through connecting pipe sections, so that the flow directions of insulating oil in the adjacent parallel pipe sections around the window are opposite.

In this way, by reversing the flow direction of the insulating oil in adjacent parallel pipe sections, the mutual heat transfer between the hot insulating oil and the cold insulating oil can be further promoted, thereby further improving the heat dissipation efficiency.

The technical scheme of the utility model new X-ray tube's window heat radiation structure has been adopted, through having increased cooling tube and oil circulation around the window, can reduce the regional temperature of window brazing high-efficiently to the probability of brazing regional leading to the vacuum to reveal because of the heat altered shape has been reduced.

According to another aspect of the present invention, the heat dissipation assembly comprises; a heat-dissipating case forming an insulating oil chamber surrounding the waist band, the cathode section, and the anode section, and having an oil inlet pipe extending inside thereof and an oil outlet opening to an outside of the heat-dissipating case, the oil inlet pipe having an oil inlet pipe inlet opening to the inside from the outside of the heat-dissipating case and an oil inlet pipe outlet provided adjacent to a periphery of the window, the oil inlet pipe outlet being provided so that insulating oil flowing out from the oil inlet pipe outlet can impinge on an area where the window is located; and a circulation pump fluidly connected to the inlet of the oil inlet pipe and the oil outlet, thereby forming a circulation loop of the insulating oil.

In this way, through setting into the oil inlet pipe export and making the insulating oil direct impact of outflow in window place region, can make the cold insulating oil of outflow strike on the region of window to take away the heat from the window region more high-efficiently.

Further, the outflow direction of the oil inlet pipe outlet and the plane of the window form an acute angle.

In this way, by arranging the outflow direction of the oil inlet pipe outlet to form an acute angle with the plane of the window, the cold insulating oil flowing out can be spread over the area of the window in a carpet-like manner after impacting the area of the window, thereby further efficiently taking heat away from the area of the window.

Further, still include the controller with set up in the temperature sensor in the oil feed pipe, the controller can be according to the temperature that temperature sensor sensed and control the velocity of flow of circulating pump.

In this way, through having set up controller and temperature sensor, can adjust the velocity of flow of circulating pump according to the temperature height in the oil feed pipe to can realize energy-conserving high-efficient.

Furthermore, a diversion trench is arranged in the oil inlet pipe along the flow direction.

In this way, the diversion trench is arranged in the oil inlet pipe, so that when cold insulating oil rushes in, eddy current is prevented from being generated in the oil inlet pipe, and oil circuit circulation is influenced.

Further, the periphery of the window is formed with a peripheral boss protruding along the radial direction of the waist band.

In this way, the provision of raised peripheral bosses through the periphery of the window enables cold insulating oil that flows out to impinge behind the area of the window, surrounding the peripheral bosses of the window, thereby further efficiently removing heat from the window area.

The technical scheme of the utility model adopted new X-ray tube's window heat radiation structure, through making the insulating oil direct impact of endless in the window region to set up the window region into boss structure, be favorable to insulating oil to take away the heat from the window region, can reduce the temperature that the window brazed the region high-efficiently, thereby reduced the probability that the region of brazing leads to the vacuum to reveal because of the heat altered shape.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:

fig. 1 shows a top view of an X-ray tube according to an embodiment of the invention;

fig. 2 shows a perspective view of the X-ray tube of fig. 1;

fig. 3 shows a top view of an X-ray tube according to another embodiment of the invention;

figure 4 shows a perspective view of the X-ray tube of figure 3;

fig. 5 shows a perspective view of an X-ray tube according to a further embodiment of the invention;

figure 6 shows a partial cross-sectional view of the X-ray tube of figure 5;

figure 7 shows a further partial cross-sectional view of the X-ray tube of figure 5;

fig. 8 shows a perspective view of an X-ray tube according to a further embodiment of the invention; and

fig. 9 shows a partial cross-sectional view of the X-ray tube in fig. 8.

Wherein the figures include the following reference numerals:

1: a waist hoop;

2: a cathode portion;

3: an anode section;

4: a window;

5: a radiating pipe;

51: an inlet;

52: an outlet;

6: an oil inlet pipe;

61: an inlet of an oil inlet pipe;

62: an oil inlet pipe outlet;

7, a temperature sensor.

Detailed Description

In order to avoid conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless defined otherwise, 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 belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the poor technical problem of X-ray tube's window department radiating effect among the prior art, provide the utility model discloses an X-ray tube.

Fig. 1 shows a top view of an X-ray tube according to an embodiment of the invention. Fig. 2 shows a perspective view of the X-ray tube in fig. 1.

An X-ray tube according to an embodiment of the present application includes: the X-ray diagnosis device comprises a waist hoop 1, wherein a window 4 is formed in the outer peripheral wall of the waist hoop 1, and the window 4 is used for allowing X-rays to pass through; the cathode part 2 and the anode part 3, the cathode part 2 and the anode part 3 are respectively and fixedly connected to two ends of the waist hoop 1 in the axial direction; and a heat dissipating assembly through which the insulating oil flows, the heat dissipating assembly being configured such that the insulating oil flows through the periphery of the window 4.

By flowing the insulating oil through the heat dissipating member around the window, heat can be more efficiently conducted away from the brazing portion of the window, and the heat can be dissipated through the increased surface area, so that the brazing portion of the window can be protected from overheating.

According to one embodiment of the present application, the heat radiating assembly includes a heat radiating pipe 5, and the heat radiating pipe 5 is provided on the outer circumferential wall of the waist band 1 to extend along the periphery of the window 4. The radiating pipe 5 has an inlet 51 and an outlet 52, and the insulating oil can flow through the radiating pipe 5 through the inlet 51 and the outlet 52.

Through the insulating oil of circulation through the cooling tube, can take away the heat from the position of brazing better to continuously provide the position of brazing with refrigerated insulating oil, thereby can cool off the position of brazing with high efficiency.

According to one embodiment of the present application, the radiating pipe 5 is made of copper alloy.

The copper alloy with high heat dissipation rate can better dissipate heat from the brazing part of the window.

According to one embodiment of the present application, the radiating pipe 5 has a flat pipe structure.

The radiating pipe can be closely attached to the brazing site around the window, thereby more facilitating heat generated at the brazing site to be conducted to the radiating pipe.

According to one embodiment of the present application, the radiating pipe 5 is mechanically fixed to the periphery of the window 4. According to one embodiment of the present application, the radiating pipe 5 is mechanically welded to the periphery of the window 4.

The radiating pipe can be further closely attached to the brazing position around the window, thereby facilitating heat conduction from the brazing position to the radiating pipe. In this way, the radiating pipe can be attached more closely at the brazing site around the window, thereby facilitating heat conduction from the brazing site to the radiating pipe.

Fig. 3 shows a top view of an X-ray tube according to another embodiment of the invention. Fig. 4 shows a perspective view of the X-ray tube in fig. 3.

According to one embodiment of the present application, the inlet 51 and the outlet 52 are oriented in the same direction, as illustrated in fig. 3. According to one embodiment of the present application, the inlet 51 and the outlet 52 are directed in opposite directions, as shown in fig. 1.

According to one embodiment of the present application, the inlet 51 and the outlet 52 are disposed along the axial direction of the waist band 1 (as shown in fig. 3) or perpendicular to the axial direction (as shown in fig. 1).

With the axial direction or this axial direction setting of perpendicular to of entry and export along waist hoop, can realize more regular overall arrangement to it is easier to make the installation of cooling tube.

According to one embodiment of the present application, the radiating pipe 5 extends around the circumference of the window 4 to form a one-turn structure or a multi-turn structure.

Through setting up the cooling tube into a circle structure or multiturn structure, can dispose the quantity of cooling tube as required for the design flexibility is higher.

According to one embodiment of the present application, the radiating pipe 5 extends around the periphery of the window 4 to form a multi-turn structure, the multi-turn structure comprises a plurality of parallel pipe sections which are arranged in a flat manner in a nested manner, and adjacent parallel pipe sections are connected through connecting pipe sections, so that the flow directions of the insulating oil in the adjacent parallel pipe sections around the window 4 are opposite.

By reversing the flow direction of the insulating oil in adjacent parallel pipe sections, the mutual heat transfer between the hot insulating oil and the cold insulating oil can be further promoted, thereby further improving the heat dissipation efficiency.

The utility model discloses a design has adopted new X-ray tube's window heat radiation structure, through increased cooling tube and oil circulation around the window, can reduce the regional temperature of window brazing high-efficiently to the probability of brazing regional leading to the vacuum to reveal because of the heat altered shape has been reduced.

Fig. 5 shows a perspective view of an X-ray tube according to a further embodiment of the invention. Fig. 6 shows a partial cross-sectional view of the X-ray tube of fig. 5, wherein the guide slots are shown. Fig. 7 shows a further partial cross-sectional view of the X-ray tube from fig. 5, wherein it is shown that the outflow direction of the oil inlet tube outlet forms an acute angle with the plane of the window.

According to one embodiment of the present application, the heat dissipation assembly comprises; a heat-dissipating case (not shown) forming an insulating oil chamber surrounding the waist band 1, the cathode portion 2 and the anode portion 3, and having an oil inlet pipe 6 extending inside thereof and an oil outlet opening to the outside of the heat-dissipating case, the oil inlet pipe 6 having an oil inlet pipe inlet 61 opening to the inside from the outside of the heat-dissipating case and an oil inlet pipe outlet 62 provided adjacent to the periphery of the window 4, the oil inlet pipe outlet 62 being provided so that the insulating oil flowing out from the oil inlet pipe outlet 62 can impinge on the area where the window 4 is located; and a circulation pump fluidly connected to the oil inlet pipe inlet 61 and the oil outlet, thereby forming a circulation loop of the insulating oil.

Through set into the oil inlet pipe export and make the insulating oil direct impact of outflow in window place region, can make the cold insulating oil impact of outflow on the region of window to take away the heat from the window region more high-efficiently.

According to one embodiment of the present application, the outflow direction of the oil inlet pipe outlet 62 forms an acute angle with the plane of the window 4.

The outflow direction of the oil inlet pipe outlet and the plane where the window is located are arranged to form an acute angle, so that the cold insulating oil flowing out can impact the area of the window, and the carpet-shaped tile spreads the area of the window, and further, the heat is efficiently taken away from the area of the window.

According to an embodiment of the present application, the system further comprises a controller and a temperature sensor 7 arranged in the oil inlet pipe 6, wherein the controller can control the flow rate of the circulating pump according to the temperature sensed by the temperature sensor 7. Specifically, when the temperature sensed by the temperature sensor 7 is higher than a threshold value, the controller increases the flow rate of the circulation pump; and when the temperature sensed by the temperature sensor 7 is lower than the threshold value, the controller decreases the flow rate of the circulation pump.

Through having set up controller and temperature sensor, can adjust the velocity of flow of circulating pump according to the temperature height in the oil feed pipe to can realize energy-conserving high-efficient.

According to one embodiment of the present application, a flow guide groove 63 is provided in the oil inlet pipe 6 in the flow direction, as shown in fig. 7.

Through set up the guiding gutter in advancing oil pipe, prevent when cold insulating oil from surging, produce the vortex in advancing oil pipe, influence the oil circuit circulation.

Fig. 8 shows a perspective view of an X-ray tube according to a further embodiment of the invention. Fig. 9 shows a partial cross-sectional view of the X-ray tube in fig. 8.

According to one embodiment of the present application, the periphery of the window 4 is formed with a peripheral boss protruding in the radial direction of the waist band 1.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An X-ray tube, comprising:

the X-ray diagnosis device comprises a waist hoop (1), wherein a window (4) is formed in the peripheral wall of the waist hoop (1), and the window (4) is used for enabling X-rays to pass through;

the cathode part (2) and the anode part (3), wherein the cathode part (2) and the anode part (3) are respectively and fixedly connected to the two ends of the waist hoop (1) in the axial direction; and

a heat dissipation assembly through which insulating oil flows, the heat dissipation assembly being configured such that the insulating oil flows through the periphery of the window (4).

2. The X-ray tube according to claim 1, wherein the periphery of the window (4) is formed with a peripheral boss protruding in a radial direction of the waist band (1).

3. The X-ray tube according to claim 1 or 2, wherein the heat radiating assembly comprises a heat radiating pipe (5), the heat radiating pipe (5) is provided on the outer circumferential wall of the waist band (1) extending along the periphery of the window (4), the heat radiating pipe (5) has an inlet (51) and an outlet (52), and the insulating oil can flow through the heat radiating pipe (5) through the inlet (51) and the outlet (52).

4. The X-ray tube according to claim 3, wherein the heat pipe (5) is made of an alloy of copper.

5. The X-ray tube according to claim 3, wherein the heat dissipating tube (5) is of a flat tube structure.

6. The X-ray tube according to claim 3, wherein the heat dissipation tube (5) is mechanically fixed or mechanically welded to the periphery of the window (4).

7. The X-ray tube according to claim 3, wherein the inlet (51) and the outlet (52) are directed in the same direction or in opposite directions.

8. The X-ray tube according to claim 7, wherein the inlet (51) and the outlet (52) are arranged along an axial direction of the waist band (1) or perpendicular to the axial direction.

9. The X-ray tube according to claim 3, wherein the heat dissipating tube (5) extends around the periphery of the window (4) forming one or more turns.

10. The X-ray tube according to claim 3, wherein the heat pipe (5) extends around the periphery of the window (4) to form a multi-turn structure comprising a plurality of parallel pipe sections nested in a tiled manner, adjacent parallel pipe sections being connected by connecting pipe sections such that the flow direction of the insulating oil in adjacent parallel pipe sections around the window (4) is opposite.

11. The X-ray tube of claim 1, wherein the heat dissipation assembly comprises:

a heat-dissipating housing forming an insulating oil chamber surrounding the waist band (1), the cathode section (2) and the anode section (3), and having an oil inlet tube (6) extending inside thereof and an oil outlet opening to the outside of the heat-dissipating housing, the oil inlet tube (6) having an oil inlet tube inlet (61) opening to the inside from the outside of the heat-dissipating housing and an oil inlet tube outlet (62) disposed adjacent to the periphery of the window (4), the oil inlet tube outlet (62) being disposed such that insulating oil flowing out from the oil inlet tube outlet (62) can impinge on the area where the window (4) is located; and

a circulation pump fluidly connected to the oil inlet pipe inlet (61) and the oil outlet, thereby forming a circulation loop of the insulating oil.

12. The X-ray tube according to claim 11, wherein the outflow direction of the oil inlet tube outlet (62) forms an acute angle with the plane of the window (4).

13. The X-ray tube according to claim 11, further comprising a controller and a temperature sensor (7) arranged in the oil feed tube (6), the controller being capable of controlling the flow rate of the circulation pump in dependence on the temperature sensed by the temperature sensor (7).

14. The X-ray tube according to claim 11, wherein a flow guiding groove (63) is provided in the oil inlet tube (6) in the flow direction.