JP2003197136A - Rotary anode x-ray tube device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary anode X-ray tube device having a structure in which the inside can be cooled by coolant, and in which an X-ray tube can be separated from a housing to be replaced as the coolant is kept sealed. <P>SOLUTION: In this X-ray tube device, a partition wall is provided in the housing 19 to part the inside to a containing part to detachably contain an X-ray tube unit 40, and a containing part to fixedly contain a stator coil. The X-ray tube unit 40 is provided with a case 41 in which the X-ray tube of a rotary anode type is held, and a passage for coolant to cool the X-ray tube 50 is provided in the case 41 to be communicated with an external cooler device 30 through a detachable duct and a connector. The X-ray tube unit 40 can be taken out by separating the duct provided on the X-ray tube unit 40 from a duct fixed to the housing 19 using the connector. The new X-ray tube unit 40 is installed on the housing 19 to be positioned, and connected to the duct fixed to the housing 19 using the connector, thereby the passage for coolant in it is connected to the cooler device 30. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary anode type X-ray tube device, and more particularly to an X-ray tube device having a cooling mechanism.
The present invention relates to a rotary anode X-ray tube device capable of separating and replacing an X-ray tube and its peripheral portion from a ray tube container.

[0002]

2. Description of the Related Art A rotary anode type X-ray tube device is incorporated as an X-ray generation source in a medical diagnostic system such as an X-ray CT or an industrial diagnostic system. In such an X-ray tube device, a device provided with a cooling mechanism for cooling the inside thereof has been developed in order to achieve high performance and high efficiency.
Its structure is also complicated.

FIG. 1 shows an example of a conventional rotary anode type X-ray tube device provided with such a cooling mechanism. Figure 1
As shown in FIG. 1, the rotary anode type X-ray tube device includes a housing 1 in which an X-ray tube 10 including a vacuum envelope 2 containing an insulator or a part of metal is arranged. There is. In this X-ray tube 10, the rotated anode target 3, the anode target 3 is fixed, the rotor 4 is rotated together with the anode target 3, and the vacuum envelope 2 is fixed, and the anode target 3 and the rotor 4 are fixed. A cathode assembly 6 that is arranged so as to face a fixed shaft 5 that rotatably supports the anode target 3 and that generates a cathode line toward the anode target 3 is housed in the vacuum envelope 2.

In the space inside the housing 1 opposite to the space inside the housing 1 in which the cathode assembly 6 is arranged and outside the vacuum envelope 2, the anode target 3 is rotated. A stator coil 7 that generates an induction electromagnetic field is arranged. Usually, this stator coil 7 is fixed in the housing 1.

In order to cool the X-ray tube and the stator coil 7 in the housing 1, the housing 1 is filled with a cooling liquid such as insulating oil. When operating the X-ray tube,
The stator coil 7 is energized from the outside and an induction magnetic field is formed around it. Therefore, the rotating body 4 is rotated at a high speed by this induced magnetic field, and the anode target 3 is rotated by the rotating body 4.
Along with high speed rotation. Further, due to the high voltage applied between the anode target 3 and the cathode of the cathode assembly 6, thermoelectrons are emitted from the cathode and collide with the anode target 3 rotating at a high speed.
Lines are generated. During operation of this X-ray tube, heat generated by the anode target 3 causes the envelope 2 and the fixed shaft 5 to move.
Becomes high temperature, and the energized stator coil 7 also generates heat and becomes high temperature. The temperatures of the envelope 2, the fixed shaft 5, and the stator coil 7 are cooled by the cooling liquid in the housing 1, and the temperatures thereof are lowered.

In the X-ray tube device shown in FIG. 1, in order to efficiently cool the heat of the X-ray tube 10 and the stator coil 7, it is composed of a heat exchanger and a pump unit provided outside the housing 1. The cooler device 8 has a structure in which the cooling medium circulates in the X-ray tube device and the X-ray tube 10 and the stator coil 7 therein can be cooled. In the X-ray tube device shown in FIG. 1, for example, insulating oil is used as a cooling medium.

[0007]

When a system equipped with an X-ray tube device is already put to use in the market, the X-ray tube 10 is generally used in comparison with other parts of the device. The performance cannot be maintained for a long period of time because the degree of vacuum inside the sphere is deteriorated with time or the cathode filament is worn. Therefore, regularly X
The tube needs to be replaced. When the X-ray tube 10 is replaced, the structure of the X-ray tube device itself is complicated, so that the system equipped with the X-ray tube device is not limited to the X-ray tube 10, but the housing 1 and the housing 1 A method of replacing the entire X-ray tube device including the cooler device 8 connected to the is adopted. The reason why such a method is adopted is that the X-ray tube 10 is immersed in the cooling liquid in the housing 1,
Take out only this X-ray tube 10 alone at the place where the X-ray system is installed, attach a new X-ray tube 10 and re-close the cooling liquid in the housing at the place where the system is installed. Is based on a very difficult task.

Generally, with respect to the life of the X-ray tube 10 alone,
The life of the housing 1, the stator coil 7, and the cooler device 8 is sufficiently long. Although the parts other than the X-ray tube 10 still have a service life, the X-ray tube device is replaced for each housing for the above reason.
Price loss will occur. Further, since the focal position for generating X-rays and the housing size are slightly different for each tube, it is necessary to adjust the position including the X-ray tube device every time the tube is replaced when actually used as an X-ray device. To be done. The refrigerant that cools the X-ray tube alone and the stator coil is indispensable for use. Especially, in recent years when high output of X-rays is demanded, methods such as air cooling are no longer used. Conventionally, in order to improve the work and price at the time of this replacement, the cooler device and the X-ray tube device are connected by a connector having a structure that does not leak the refrigerant inside, and only the housing that houses the X-ray tube is replaced. There is also a way to do it.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to cool the inside of the X-ray tube with a cooling liquid and to separate the X-ray tube from the housing while keeping the cooling liquid sealed. It is an object to provide a rotating anode X-ray tube device having a structure that can be exchanged.

[0010]

According to the present invention, there is provided an anode target, a rotary body to which the anode target is fixed and which supports the anode target, and which has a rotary drive section for generating a rotational force. A fixed body that rotatably supports this rotating body, a cathode that is arranged to face the target, the anode target, the rotating body, the fixed body, and the cathode are housed, and the fixed body is held and fixed. An X-ray tube including a vacuum envelope, a coil for generating an induction electromagnetic field to be applied to the rotation drive section to rotate the rotation drive section, a first space for accommodating the X-ray tube, and A housing having the coil and a second space separated from the first space, the coil being fixedly held, the X-ray tube being detachably held, and the X-ray from the housing. A wire tube A housing having a releasing possible structure, rotating anode X-ray tube apparatus characterized by comprising a are provided.

Further, according to the present invention, the anode target, the rotating body on which the anode target is fixed and which supports the anode target, and the rotating body having the rotation drive section for generating a rotating force, and the rotating body are provided. A vacuum envelope in which a fixed body rotatably supported, a cathode arranged to face a target, the anode target, the rotating body, the fixed body and the cathode are housed, and the fixed body is held and fixed. An X-ray tube including: an X-ray tube container section for holding the X-ray tube and defining therein a flow path of a cooling liquid for cooling the X-ray tube; and the rotation drive section. A coil for generating an induction electromagnetic field to rotate the rotation drive unit, a first space for accommodating the X-ray tube container portion, and a second space for accommodating and fixing the coil from the first space. With a housing that has a partition that divides the space And a housing having a detachable structure for detachably holding the X-ray tube container portion and detaching the X-ray tube container portion from the housing. Provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary anode X-ray tube device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a sectional view schematically showing the structure of the rotary anode X-ray tube device according to the embodiment of the present invention. 3, 4 and 5 are a perspective view and a sectional view showing in detail the structure of the housing 19 of the rotary anode X-ray tube device shown in FIG. FIG. 6 is a cross-sectional view showing the structure of the X-ray tube unit of the rotary anode X-ray tube device shown in FIG.

As shown in FIG. 2, the rotary anode X-ray tube device has a substantially cylindrical housing 19 and a unitized X-ray tube.
The tube unit 40 is provided. As shown in FIGS. 2 and 3, the housing 19 has a partition wall 20 therein, and the space inside the housing 19 includes a bulb storage space portion 24A for storing the X-ray tube unit 40 by the partition wall 20 and It is airtightly isolated from a stator coil housing space 24B housing the stator coil 22. The partition wall 20 is provided with a bottomed tubular portion 20A protruding toward the lid portion 19A of the housing 19 at the center thereof, and the bottomed tubular portion 20A accommodates the X-ray tube unit 40. Has a shape corresponding to that of the X-ray tube unit 40, and is a hollow cylindrical portion 51 which is a part of the X-ray tube 50 of the X-ray tube unit 40.
A is inserted and arranged.

In the housing 19, the cooling liquid supplied from the cooler device 30 is introduced into the tube storage space 24A,
Ducts 31A and 31B that define liquid passages for returning the cooling liquid from the tube housing space portion 24A to the cooler device 30 are provided. Spring-type connectors 32A and 32B are provided at both ends of the ducts 31A and 31B. The ducts 31A and 31B are the ducts 3 on the cooler side, which are also provided with spring-type connectors 35A and 35B.
3A, 33B and ducts 34A, 3 on the X-ray tube unit side
When 4B is installed, these ducts 33A, 33B,
34A, 34B, and these ducts 33A, 33
When B, 34A and 34B are detached, the connector 32
Liquid-tightly sealed by A and 32B. Similarly, from the ducts 31A and 31B on the housing side to the ducts 33
When A, 33B, 34A, 34B are detached, these ducts 33A, 33B, 34A, 34B are liquid-tightly sealed by the connectors 35A, 35B. Cooler device 30, ducts 31A, 31B, 33A, 33B, 34
A and 34B constitute a part of a cooling liquid circulation network for cooling the X-ray tube 50 in the X-ray tube unit 40.

The housing 19 as shown in FIGS.
Is provided with a housing window 25 corresponding to the X-ray window 51B of the X-ray tube unit 40. This housing window 2
5 is opposed to the X-ray window 51B of the X-ray tube unit 40 when the X-ray tube unit 40 is placed in the tube storage space 24A, and the X-rays from the X-ray tube unit 40 are stored in the housing window 25. It is radiated to the outside of the X-ray apparatus via the. As shown in FIGS. 3 and 5, the X-ray tube unit 40 is installed in the tube storage space 2
Even when the position of the X-ray tube unit 40 is determined when the X-ray tube unit 40 is placed in 4A and the X-ray tube unit 40 is replaced,
A step portion, that is, a step portion 26 is provided in the housing 19 so that the X-ray tube unit 40 is always arranged at the same position. Corresponding to the step portion 26, the case 41 of the X-ray tube unit 40 is provided with a flange portion 41A that abuts on the step portion 26. When the X-ray tube unit 40 is arranged in the tube storage space 24A and the flange portion 41A is brought into contact with the step portion 26, the X-ray tube unit 40 and the housing 19 are positioned with respect to the axial direction of the X-ray tube unit 40. Be matched. Further, the housing 19
A screw hole 27 is formed in the step portion 26 of
A screw hole 42 is formed in the flange portion 41A of the X-ray tube unit 40 so as to correspond to the screw hole 27. When the X-ray tube unit 40 is placed in the tube storage space 24A and the positions of the screw holes 27 and 42 are aligned, the X-ray tube unit 4
0 and the housing 19 are aligned about the axis of the X-ray tube unit 40. This X-ray tube unit 40 is
By screwing the screw 43 into the aligned screw holes 27 and 42, the screw 19 is securely fixed to the housing 19.

After the unitized X-ray tube unit 40 is fixed and housed in the tube housing space 24A, the opening of the housing 19 is sealed by the lid 21 which can be opened and closed in the air. ing. This lid portion 21 is the housing 1
It is securely fixed in such a manner that it can be opened and closed by fitting it into the opening of 9, and screwing it or other fixing structure. Also, this lid 2
1 is provided with an opening 28 for holding the cathode portion 44 of the X-ray tube unit 40, and the X-ray tube unit 40 is surely held also by this opening 28. On the peripheral wall of the housing 19 that defines the tube housing space portion 24A,
A slit 29 for introducing outside air is formed, and the member arranged in the tube housing space portion 24A is cooled by the outside air.
Although the slit 29 is shown in FIGS. 2, 3 and 5, not all of the slit 29 is drawn for the purpose of simplifying the drawings, but only a part thereof is drawn. Furthermore,
Outside air is introduced into the slit 29 and the housing 1
A large number of fins (not shown) may be provided on the outer peripheral surface of the housing 19 to increase the surface area of the housing 9 and cool the housing 19. By this fin, a larger amount of outside air is taken into the tube storage space 24A, and the cooling liquid ducts 34A and 34B, the X-ray tube unit 40, and the like arranged therein are efficiently cooled.

The stator coil 22 is housed in the stator coil housing space 24B, is fixed to the housing 19, is filled with the cooling liquid 23, and the opening of the housing 19 is sealed by the fixed lid 25. The coolant 23 absorbs the heat generated by the stator coil 22 when the stator coil 22 is energized,
Is cooled. A bellows 37 having an empty tray is arranged in the stator coil housing space 24B. Further, since the stator coil 22 is energized, insulating oil is used as the cooling liquid filled in the stator coil housing space 24B. Electric power is supplied to the stator coil 22 from the outside of the housing during operation of the tube, and an induction electromagnetic field is generated. This induced electromagnetic field is transmitted through the bottomed tubular portion 20A of the housing 19 to the rotary body drive unit 52 in the X-ray tube 50.
And the rotary body 52 is rotated.

The X-ray tube unit 40 is composed of a case 41 and an X-ray tube 50 housed in the case 41 as shown in FIG. The X-ray tube 50 has a hollow cylindrical portion 51A, and is provided with a vacuum peripheral device 51 whose interior is maintained in vacuum. A fixed shaft 53 arranged along the axis of the X-ray tube 50 is fixed to the vacuum peripheral device 51. The fixed shaft 53 is formed with a cooling liquid passage 53A that is folded back inside and is open at one end thereof. The flow port 53A has its output port side communicated with the duct 34B, and its input port side communicated with the flow channel inside the case 41 with 47.

In the X-ray tube 50, the fixed shaft 53 rotatably supports the rotating body 54, and a bearing, for example, a dynamic pressure bearing, is provided between the two. A rotary anode 55 is fixed to the rotating body 54 so as to rotate together with the rotating body 54. The cathode 56 of the cathode portion 44 is arranged so as to face the target surface of the rotating anode 55. The cathode portion 44 is a hollow cylindrical portion 51.
It is housed in and fixed to the vacuum peripheral device 51 so as to project to the side opposite to A. When the cathode 56 is energized and the electron beam is focused and generated toward the focal position on the target surface of the rotating anode 55, and the electron beam is projected to the focal position on the target surface of the rotating anode 55,
X-rays are generated from the focal position of the rotating anode 55 on the target surface. The vacuum envelope 51 is provided with an X-ray window 51B so as to form a part of the vacuum envelope 51, and the case 41 accommodating the X-ray tube 50 is provided with this X-ray window 51B, a so-called Be window. A window frame 41B is provided so as to be exposed to the outside.

From the base of the rotary body 54, a skirt-shaped cylindrical rotary body drive portion 52 extends into the hollow cylindrical portion 51A. The hollow cylindrical portion 51A is formed in a substantially double cylindrical shape with an opening closed to accommodate the cylindrical rotating body driving portion 52, and a cylindrical space between the double cylindrical portions is a rotating body driving portion 52. It is defined in the storage section of.

As shown in FIG. 6, the case 41 accommodating the X-ray tube 50 is provided with an input port to which the duct 34A is connected.
5 is formed in the case 41 so as to extend along the outer periphery of the cathode portion 44. The cooling liquid channel 45 extends on the outer periphery of the window frame 41B of the case 41 and communicates with the hollow cylindrical portion 51A side cooling liquid channel 46 in the case 41. The cooling liquid flow path 46 extends around the hollow cylindrical portion 51A, further extends spirally around the X-ray tube 50, is provided on the cathode part 44 side of the case 41, and is provided with a cooling liquid flow. The buffer space 48 communicates with the passage 47. A bellows 49 having an empty tray is installed in the buffer space 48, and the cooling liquid circulated in the X-ray tube device is expanded or contracted. The expansion or contraction of the cooling liquid is absorbed by the bellows 49. It

In the X-ray tube device described above, the X-ray tube 50 and the stator coil 22 are cooled as follows. The stator coil 22 is cooled by natural convection by the insulating oil around the stator coil 22. At this time, the oil generated by the stator coil 22 heats and expands the oil, or the oil cools and contracts. This expansion and contraction is absorbed by the bellows 37 having a hollow tray.

In cooling the X-ray tube 50, the cooling liquid is supplied to the X-ray tube device from the cooler device 30 provided outside the housing 19 and having a pump function. Water is used as a cooling liquid for cooling the X-ray tube 50 according to this embodiment.
The cooling liquid supplied from the cooler device 30 is indicated by an arrow 6 in FIG.
As indicated by reference numeral 1, it is guided to the duct 34A in the housing 19 through the ducts 33A and 31A. As shown by the arrow 62, the cooling liquid is supplied to the case 4 via the duct 34A.
It is flowed into the flow path 45 in the No. 1. The cooling liquid is applied to the outer periphery of the cathode part 44 and the case 41 as shown by arrows 63 and 64.
Flows along the flow path 45 along the outer periphery of the window frame 41B, and is led out to the cooling liquid flow path 46 on the hollow cylindrical portion 51A side in the case 41 as shown by an arrow 65. Since this flow path 46 extends around the hollow cylindrical portion 51A, the cooling liquid is cooled by the hollow cylindrical portion 51 as indicated by arrows 66 and 67.
It flows around A and is guided to a flow path (not shown) spirally extended around the X-ray tube 50 as indicated by arrows 68, 69, 70 and 71. The cooling liquid flowing around the X-ray tube 50 is directed to the cathode part 44 side of the case 41, guided to the cooling liquid buffer space 48, and introduced into the liquid flow path 47 as shown by an arrow 72. The cooling liquid that has flowed out of the liquid flow path 47 is supplied to the fixed shaft 5 via the input port of the fixed shaft 53.
Introduced into the cooling liquid flow path 53A that is folded back in 3,
The input port is provided on the same side and is guided to the duct 34B through the output port of the fixed shaft 53. The cooling liquid guided to the duct 34B passes through the duct 31B to cooler device 3
It is set back to 0.

As described above, the cooling liquid supplied from the cooler unit 30 is introduced into the X-ray tube unit 40 and circulates around the X-ray tube 50, so that heat is generated during the operation of the X-ray tube 50. When it occurs, heat is effectively transferred to the coolant,
Even if the X-ray tube unit 40 has a closed structure, the X-ray tube 50
Is effectively cooled. Further, since the slit 29 for introducing the outside air is formed on the peripheral wall of the housing 19 defining the tube housing space 24A, the outside air is introduced from the outside of the housing, and the inside of the tube housing space 24A is naturally air-cooled. To be done. In particular, when the X-ray tube device is used for a tomographic diagnosis system (CT device), the housing 19 to which the rotating mechanism is attached is rotated at a high speed of 5 to 10 m / sec, so that the slit for air cooling is more reliable. Therefore, the X-ray tube 50 is cooled more effectively.

The above-described X-ray tube device is attached to a device such as a tomographic diagnosis system together with the cooler device and the housing 19 and is used as an X-ray source. When the X-ray tube device is moved for a certain period, the X-ray tube unit 40 whose durability time has elapsed is taken out with the cooler device and the housing 19 attached to the device, and a new X-ray tube unit is taken out.
The tube unit 40 is replaced.

At the time of tube replacement, the lid 21 is removed from the housing 19, and the duct 34A,
34B connectors 35A, 35B are ducts 31A, 31
It is removed from the B connectors 32A and 32B. The connectors 35A, 35B, 32A, and 32B are sealed by the sealing mechanism inside the connectors 35A, 35B, 32A, and 32B, so that the cooling liquid in the ducts 31A, 31B, 34A, and 34B is sealed by the duct 3.
Leakage from 1A, 31B, 34A, 34B is prevented. Further, the screw 43 is removed from the screw holes 27 and 42, the X-ray tube unit 40 is taken out of the housing 19, and the X-ray tube unit 40 whose durability time has elapsed is removed from the housing 19.

When the new prepared X-ray tube unit 40 is attached to the housing 19, it is attached to the housing 19 in the reverse order to the above. In this mounting process, the X-ray tube unit 40 includes the flange portion 41A provided on the case 41 thereof and the step portion 26 inside the housing 19.
The X-ray tube unit 40 and the housing 19 are aligned with respect to the axial direction of the X-ray tube unit 40 by abutting against the X-ray tube unit 40. Further, by aligning the screw hole 42 provided in the flange portion 41A of the X-ray tube unit 40 with the screw hole 27 provided in the step portion 26, the X-ray tube unit 40 and the housing 19 are separated from each other. Aligned about the axis.

When the cooler device 30 is replaced,
The ducts 33A and 33B are removed from the connectors 32A and 32B of the ducts 31A and 31B, and the cooler device 30 is separated from the housing 19 and can be easily replaced with a new cooler device 30.

In the embodiment described above, the X-ray tube unit 40 is aligned with the housing 19 by the flange portion 41A of the X-ray tube unit 40, the step portion 26 of the housing 19, the screw holes 27, 42 and the screw 43. Is going to be done. However, in reality, there may be a slight error in the shape and size in the manufacturing process of the X-ray tube unit 40 and the housing 19, and there may be an assembly error when the X-ray tube unit 40 is attached to the housing 19. There is. If an error occurs, the focal position of the X-ray apparatus may be misaligned, and accurate data may not be obtained by the diagnostic system to which the X-ray apparatus is attached. Therefore,
In order to correct this error, it is preferable that a correction mechanism for correcting the focus position is provided in the housing 19 or the X-ray tube unit 40.

Next, a modified embodiment of the X-ray tube device of the present invention will be described with reference to FIGS. 7 and 8. In FIGS. 7 and 8, the parts or parts to which the same reference numerals have been already used in the description with reference to FIGS. 2 to 6 indicate the same parts and the same parts, and the description thereof will be omitted.

The X-ray tube device shown in FIG. 7 is different from the X-ray tube device shown in FIGS. 2 to 6 in the cooling system. Figure 7
In the X-ray tube device shown in (1), not only the X-ray tube 50 but also the stator coil 22 is cooled with the same cooling liquid, for example, insulating oil. That is, as shown in FIG. 8, the fixed shaft 53 is provided with a cooling liquid passage 53A extending along the center thereof, and its input port is communicated with the cooling liquid buffer space 48 via the duct 71. The output port is connected via a duct 72 to a connector 74 provided on the partition wall 20 and having a sealing function at the time of attachment / detachment. The duct 72 is provided with a connector 73 that also has a sealing function at the time of attachment / detachment. When the connector 73 is connected to the connector 74, the sealing mechanism is released and the two are communicated, and when the two are separated, both connectors 73, The sealing mechanism of 74 acts to connect the connectors 73,
The seal 74 is sealed to prevent the coolant from flowing out through the connectors 73 and 74. The connector 74 is in communication with the stator coil housing space 24B via a cooling liquid flow path 75 defined between the partition wall 20 and the bellows 37. In addition, the duct 31B provided in the housing 19
Is connected to the stator coil storage space 24B, and the cooling liquid discharged from the stator coil storage space 24B is
It is returned to the cooler device 30 via this duct 31B.

In the X-ray tube device shown in FIG. 7, the cooling liquid supplied from the cooler device 30 is ducts 33A and 31A.
Through the duct 34A in the housing 19.
The cooling liquid flows through the duct 34A into the flow path 4 in the case 41.
Inflow to 5. The cooling liquid flows along the flow path 45 along the outer circumference of the cathode part 44 and the outer circumference of the window frame 41B of the case 41, and is led out to the cooling liquid flow path 46 on the hollow cylindrical portion 51A side in the case 41. This flow path 46 is a hollow cylindrical portion 51.
Since it extends around A, the cooling liquid flows around the hollow cylindrical portion 51A and is guided to a flow path (not shown) that extends around the X-ray tube 50 in a spiral shape. X-ray tube 50
The cooling liquid flowing around the
To the side and is guided to the coolant buffer space 48,
It is introduced into the duct 71. The cooling liquid passing through the duct 71 is
It is introduced into the cooling liquid flow path 53A in the fixed shaft 53 via the input port of the fixed shaft 53, and is guided to the duct 72 via the output port of the fixed shaft 53. The cooling liquid guided to the duct 72 is guided to the stator coil housing space 24B via the cooling liquid flow passage 75, and then to the cooler device 3 via the duct 31B.
It is set back to 0.

As described above, the cooling liquid supplied from the cooler device 30 is introduced into the X-ray tube unit 40, circulated around the X-ray tube 50, and then supplied around the stator coil 22. Therefore, even if heat is generated during operation of the X-ray tube 50 and the stator coil 22, the heat is effectively transferred to the cooling liquid, and the X-ray tube 50 is effective even if the X-ray tube unit 40 has a closed structure. Is cooled.

The cooling structure shown in FIG. 7 is effective for an X-ray tube or the like in which the stator coil generates a large amount of heat. When replacing the X-ray tube unit 50, the lid 21 is removed from the housing 19 as in the X-ray tube device shown in FIG.
The connection with 5A and 32A is released, and the duct 34A is separated from the duct 31. After that, the fixing screw 43 is removed similarly to the X-ray tube device shown in FIG.
Is pulled out in the axial direction, the connection between the connectors 73 and 74 is released, and the duct 72 is taken out together with the X-ray tube unit 50. When a new X-ray tube unit 50 is attached, the connector 73 is aligned with the connector 74 and the X-ray tube unit 50 is pushed in, so that the two are connected without liquid leakage.

In the above-described embodiment and modified embodiment, the input port of the flow channel 45 is provided in the case 41, and the flow channels 45, 46, 47 and the buffer space 48 are formed in the case 41. However, a part or all of the input / output port, the flow path and the buffer space are formed in the vacuum envelope 51 of the X-ray tube 50, and the case is provided only to protect the vacuum envelope 51 of the X-ray tube 50. You may be taken.

[0037]

As described above, according to the present invention, the cooling liquid flow path which is fixed to the vacuum envelope and is directly connected to the outside of the housing can be used for the X-ray tube without filling the housing with the cooling liquid. It becomes possible to efficiently cool the heat generated from the outside, and the stator coil has a housing structure that has a space inside which is airtightly separated from the X-ray tube. And can be easily attached.

Due to the structure of the housing and the X-ray tube having such a structure, it is necessary to replace the entire heavy housing when replacing the tube, but only the relatively light X-ray tube unit in the housing can be easily replaced. In addition, since it can be safely replaced, the running cost on the side using the device is significantly improved compared to the conventional one.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a conventional X-ray tube device.

FIG. 2 is a sectional view schematically showing an X-ray tube device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing the housing of the X-ray tube device shown in FIG. 2 from the side of a tube storage space.

4 is a perspective view showing the housing of the X-ray tube device shown in FIG. 2 from the stator coil housing space side.

5 is a cross-sectional view schematically showing a housing of the X-ray tube device shown in FIG.

6 is a sectional view schematically showing an X-ray unit of the X-ray tube device shown in FIG.

FIG. 7 is a sectional view schematically showing an X-ray tube device according to a modified embodiment of the present invention.

8 is a sectional view schematically showing a housing of the X-ray tube device shown in FIG.

[Explanation of symbols] 19. ． ． housing 20. ． ． Partition 21. ． ． Lid 22. ． ． Stator coil 29. ． ． slit 30. ． ． Cooler device 33A, 33B, 34A, 34B. ． ． duct 32A, 32B, 35A, 35B. ． ． connector 40. ． ． X-ray tube unit 41. ． ． Case 44. ． ． Cathode part 37, 49. ． ． Bellows 50. ． ． X-ray tube 51. ． ． Vacuum peripheral 51B. ． ． X-ray window 52. ． ． Rotating body drive 53. ． ． Fixed axis 54. ． ． Rotating body 56. ． ． cathode 55. ． ． Rotating anode

Claims (18)

[Claims] 1. An anode target, a rotating body to which the anode target is fixed and supports the rotating body, the rotating body having a rotation drive unit for generating a rotational force, and a fixed body rotatably supporting the rotating body. A body, a cathode arranged to face the target, a vacuum envelope accommodating the anode target, the rotating body, the fixed body and the cathode, and the fixed body being held and fixed. A ray tube; a coil for generating an induction electromagnetic field to be applied to the rotation drive section to rotate the rotation drive section; a first space for accommodating the X-ray tube and the coil for accommodating the first space; A housing having a second space partitioned from the space, the housing having a structure in which the coil is fixedly held, the X-ray tube is detachably held, and the X-ray tube can be separated from the housing. A rotary anode X-ray tube device comprising: 2. The rotary anode type according to claim 1, further comprising a cooling structure provided in the vacuum envelope and defining a liquid passage of a cooling liquid for cooling the X-ray tube. X-ray tube device. 3. Cooling liquid supplying means for supplying the cooling liquid, and cooling liquid circulating means for circulating the cooling liquid between the liquid path of the cooling liquid of the cooling structure and the cooling liquid supplying means. 3. The rotary anode type X-ray tube device according to claim 2, further comprising: a cooling liquid flow means that is detachably connected to the cooling structure and communicates with the cooling liquid. 4. The rotary anode X-ray tube device according to claim 1, wherein the housing has a partition structure, and the partition structure hermetically separates the first and second spaces. 5. The second space, in which the coil is housed,
The rotary anode X-ray tube device according to claim 5, which is filled with a cooling liquid. 6. The rotary anode X-ray tube device according to claim 5, wherein a hollow tray structure for absorbing expansion and contraction of the cooling liquid is provided in the second space. 7. A liquid passage for a cooling liquid is formed in the fixed body,
The rotary anode X-ray tube device according to claim 2, wherein the liquid passage communicates with the liquid passage of the cooling structure. 8. The rotary anode X according to claim 2, wherein the cooling liquid flow path of the cooling structure is provided with an empty tray structure for absorbing expansion and contraction of the cooling liquid. Wire tube device. 9. The housing is provided with an adjusting mechanism capable of holding the X-ray tube container portion at a predetermined position and adjusting an X-ray focal point position of the X-ray tube to a predetermined position. X-ray tube device according to claim 1. 10. An anode target, a rotating body to which the anode target is fixed and supports the rotating body, the rotating body having a rotation drive unit for generating a rotating force, and a fixed body rotatably supporting the rotating body. A body, a cathode arranged to face the target, a vacuum envelope accommodating the anode target, the rotating body, the fixed body and the cathode, and the fixed body being held and fixed. A X-ray tube, an X-ray tube container section for holding the X-ray tube, in which a flow path of a cooling liquid for cooling the X-ray tube is defined, and an induction electromagnetic field applied to the rotation drive section. A coil for generating and rotating the rotation drive unit; a first space for accommodating the X-ray tube container unit;
Is a housing having a partition wall defining a second space in which the coil is housed and fixed from the above space, the X-ray tube container part is detachably held, and the X-ray tube container part can be separated from the housing. A housing having a desorption structure, and a rotating anode X-ray tube device. 11. Cooling liquid supply means for supplying the cooling liquid, and cooling liquid circulation means for circulating the cooling liquid between the cooling liquid flow path of the cooling structure and the cooling liquid supply means. 11. The rotary anode type X-ray tube device according to claim 10, further comprising: a cooling liquid flow means that is detachably connected to the cooling structure and communicates with the cooling liquid. 12. The rotary anode X-ray tube device according to claim 11, wherein a liquid passage for the cooling liquid is formed in the fixed body, and the liquid passage is in communication with the liquid passage of the cooling structure. 13. The second space is communicated with a liquid passage of the cooling structure, and the cooling liquid is returned to the cooling liquid supply means via the second space.
1 rotating anode X-ray tube device. 14. The rotary anode type X according to claim 11, wherein the second space in which the coil is housed is filled with a cooling liquid.
Wire tube device. 15. The rotary anode X-ray tube device according to claim 11, wherein a hollow tray structure for absorbing expansion and contraction of the cooling liquid is provided in the second space. 16. The rotating anode X according to claim 11, wherein the cooling liquid flow path of the cooling structure is provided with an empty tray structure for absorbing expansion and contraction of the cooling liquid. Wire tube device. 17. The rotary anode X-ray apparatus according to claim 10, wherein the housing is provided with an outside air introduction port for introducing outside air into the first space. 18. The housing is provided with an adjusting mechanism capable of holding the X-ray tube container portion at a predetermined position and adjusting an X-ray focal point position of the X-ray tube to a predetermined position. X-ray tube device according to claim 10.