JP2002373800A - X-ray tube device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow sharing of a tube vessel having, otherwise, a many kind of fitting parts of an X-ray radiation window depending on the difference between applications of an X-ray tube device. SOLUTION: A radiation window adaptor 24 is fit with a screw 28 to a radiation window fitting part 25 in a tube vessel 21 of an X-ray tube device 20, and a radiation window adaptor 22 having a deep recess in the center is fixed with a ring-shaped screw 40 to the radiation window adaptor 24. Each oil tightness is performed with O-rings 28, 30 arranged in seal grooves 29, 31 installed in the radiation window fitting part 25 and the radiation window adaptor 24, and X-ray leak protection is performed with lead plates 32, 34 stuck to the outer circumference and the inner circumference of the radiation window adaptor 24. By the fitting of the radiation window adaptor 24, the distance between a focal point of an X-ray tube and a top surface (an X-ray radiation port front) 33 of the radiation window adaptor 24 is made adjustable to accommodate difference depending on the applications of the X-ray tube device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an X-ray tube container (hereinafter, referred to as a tube container) of an X-ray tube device, and more particularly to a technique for sharing a tube container in X-ray tube devices having different uses. .

[0002]

2. Description of the Related Art An X-ray tube apparatus is mainly composed of an X-ray tube, an insulating oil for insulating the X-ray tube, and a tube container containing the X-ray tube and the insulating oil. In X-ray tube devices, different tube vessels are usually used for different applications. For example, the structure of a tube container is different between an X-ray tube device mounted on an X-ray CT device and an X-ray tube device mounted on an X-ray circulatory diagnostic device.

On the other hand, an X-ray tube has a similar structure regardless of the intended use. In particular, in an X-ray tube device having substantially the same thermal characteristics, the structure and dimensions of the X-ray tube are almost the same, so that X-ray tubes for different purposes can be mounted in the same tube container.

Here, an example of the structure of a conventional X-ray tube device will be described with reference to FIG. In FIG. 4, the X-ray tube device 1
Are the X-ray tube 2, tube container 3, cable receptacle 4
, A stator coil 5, an X-ray radiation window 6, an insulating oil 7, and the like. The X-ray tube 2 includes a rotating anode 2a, a cathode 2b,
And an envelope 2c that insulates and supports both electrodes and encloses them in a vacuum-tight manner. The X-ray tube 2 has an anode end supported by an anode-side support 8 and a cathode end supported by a cathode-side support 9 on the inner wall of the tube container 3. A stator coil 5 is arranged on the outer periphery of the rotor 2d of the rotating anode 2a of the X-ray tube 2, and the stator coil 5
And the rotor 2d constitute a motor. Stator coil 5 is supported by stator insulating cylinder 10. A high voltage and a filament heating voltage are externally supplied to the rotating anode 2a and the cathode 2b of the X-ray tube 2 through the cable receptacles 4 on the anode and cathode sides.

[0005] The tube container 3 is a metal container having an X-ray proof and electric shock proof structure, and a lead plate for X-ray shielding is affixed to the inner wall thereof. An X-ray radiation window 6 for extracting X-rays to the outside is attached near the focal point of the X-ray tube 2 on the side surface of the tube container 3. The X-ray radiation window 6 has a bowl-like shape with a flange, and is made of a material having good X-ray transparency, such as an epoxy resin without a filler. A projecting portion (hereinafter, referred to as a radiation window mounting portion) 11 for mounting the X-ray radiation window 6 is provided on the central side surface of the tube container 3. X-ray emission window 6
The flange portion is fixed to the radiation window mounting portion 11 by a ring-shaped screw 12, so that the flange portion is mounted on the tube container 3.

[0006] Among the structures of the conventional X-ray tube apparatus described above, the structure may be different depending on the use of the X-ray tube apparatus 1. The main part is the radiation window mounting part 11 of the tube container 3 and its peripheral part. Conventional X-ray tube device 1
Since the X-ray emission window 6 according to the use of the X-ray tube device 1 is used in the tube container 3, the radiation window mounting portion 11 which is a portion for installing the X-ray emission window 6 of the tube container 3 and its surroundings The structure of the part will be different.

[0007]

In the conventional X-ray tube apparatus, the X-ray tube has the same structure regardless of the intended use as long as the X-ray tube has similar thermal characteristics. X
Since the radiation window 6 has a structure that matches the intended use,
It was necessary to make the structure of the tube container 3 different depending on the intended use. As a result, various types of tube containers 3 have been required.

Under such a condition, for example, X
The X-ray CT system has the same thermal characteristics as the conventional X-ray tube system installed in the X-ray CT system. Since it has a different X-ray emission window than the case where it is mounted on a tube and the structure of the tube container is different, it is necessary to conduct new development of the tube container itself and a reliability test of the tube container itself. Was needed.

In view of the above, according to the present invention, the type of tube container is reduced by sharing the tube container for the X-ray tube device having a different structure of the portion where the X-ray emission window is attached because it is used for different purposes. The purpose is to do. Also,
An object of the present invention is to reduce the cost of an X-ray tube apparatus by using one kind of tube container for various uses.

Another object of the present invention is to reduce the development cost and the development period when an X-ray tube having the same thermal characteristics as a conventional product is mounted on an X-ray apparatus for another use.

[0011]

In order to achieve the above object, an X-ray tube apparatus according to the present invention comprises: an X-ray tube for generating X-rays;
An insulating oil for insulating the high voltage supplied to the X-ray tube, a tube container containing the X-ray tube and the insulating oil and insulatingly supporting the X-ray tube;
In an X-ray tube apparatus provided with an X-ray emission window for extracting X-rays to the outside of the tube container, and an X-ray tube attachment portion to which the tube container can attach the X-ray emission window, the X-ray tube device emits radiation. Attach the window adapter and attach X to the radiation window adapter.
It is equipped with a radiation window (Claim 1).

In this configuration, the radiation window adapter can be attached to the radiation window attachment portion of the tube container of the X-ray tube device, and the radiation window adapter can be attached to the radiation window adapter.
By replacing the radiation window adapter and the X-ray radiation window based on the types of tube containers, various types of X-ray tube devices can be made. It can correspond to the application.

In the X-ray tube apparatus of the present invention, the radiation window adapter is attached to the radiation window attachment portion of the tube container, so that the front surface of the X-ray emission port corresponding to the upper surface of the radiation window adapter and the X-ray tube. The distance from the focal point is extended (claim 2).

In this configuration, since the radiation window adapter is attached to the radiation window attachment portion of the tube container, the focal point of the X-ray tube and the X-ray tube
The distance H between the front surface of the radiation emitting port and the distance between the focal point of the X-ray tube and the upper surface of the radiation window mounting portion can be increased. That is, the distance H can be changed and adjusted by changing the dimensions of the radiation window adapter. Since this distance H varies depending on the application of the X-ray tube apparatus, it is possible to respond by changing only the radiation window adapter and the X-ray radiation window without changing the structural dimensions of the tube container by changing the dimensions of the radiation window adapter. it can.

In the X-ray tube apparatus according to the present invention, the portion of the radiation window adapter facing the focal point of the X-ray tube is configured to be accommodated in the portion of the radiation window mounting portion to which the X-ray radiation window is mounted. . In this configuration, since the lower surface portion of the radiation window adapter can be accommodated in the radiation window mounting portion, the radiation window adapter can be easily mounted on the radiation window mounting portion.

In the X-ray tube apparatus according to the present invention, an oil-tight structure is further provided in a portion of the radiation window adapter that accommodates the X-ray radiation window. The oil-tight structure includes an oil-tight packing and a groove structure for accommodating the oil-tight packing. In this configuration, since the oil-tight structure using the oil-tight packing or the like is provided between the radiation window adapter and the X-ray radiation window, the oil-tightness of the radiation window adapter is reliably maintained.

In the X-ray tube apparatus according to the present invention, the radiation window adapter is further provided with an X-ray leakage prevention measure for preventing X-ray radiation in directions other than the X-ray radiation direction. In this configuration, since the radiation window adapter is subjected to the X-ray leakage prevention measure, even if the radiation window adapter is attached to the radiation window mounting portion, the X-ray leakage does not increase, so that safety is ensured.

The tube container according to the present invention is capable of containing an X-ray tube for generating X-rays and insulating oil for insulating a high voltage supplied to the X-ray tube, and is capable of mounting an X-ray emission window. In the tube container provided with the above, the radiation window mounting portion is configured to be capable of mounting a radiation window adapter to which an X-ray radiation window can be mounted (claim 3). In this configuration, since the radiation window adapter can be attached to the radiation window attachment portion of the tube container and the X-ray radiation window can be attached to the radiation window adapter, various types of X-ray tube devices can be used based on one type of tube container. Can be made.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Regarding the reference numerals in the drawings, the same reference numerals are used for elements having the same functions as those in the conventional example.
1 to 3 show a first embodiment of the X-ray tube apparatus according to the present invention. This example uses the same X-ray tube and tube container,
Since the feature is that two or more types of X-ray tube devices can be configured, the following description describes a case where two types of X-ray tube devices are configured using the same X-ray tube and tube container. . FIG. 1 is a first view of an X-ray tube apparatus according to the present invention.
2 is an overall structural view of one X-ray tube device (hereinafter, referred to as a first X-ray tube device) of the embodiment, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. The main part enlarged views of a ray tube device (hereinafter, referred to as a second X-ray tube device) are respectively shown.

In FIG. 1, a first X-ray tube apparatus of the present embodiment
Reference numeral 20 denotes an X-ray tube 1, a tube container 21 containing the same, an anode-side support 8 and a cathode-side support 9, which insulate and support the anode and cathode sides of the X-ray tube 2 on the inner wall of the tube container 20. An anode-side cable receptacle for supplying a high positive voltage to the stator coil 5 for rotatingly driving the rotating anode 2a of 2 and the rotating anode 2a of the X-ray tube 2
4a, cathode side cable receptacle for supplying high voltage of negative potential and filament heating voltage to cathode 2b of X-ray tube 2
4b, a stator insulating cylinder 10 for insulating between the envelope 2c of the X-ray tube 2 and the stator coil 5, an insulating oil 8 for insulating and cooling the X-ray tube 2, and a rotating anode 2a of the X-ray tube 2. It comprises an X-ray emission window 22 for taking out X-rays to the outside of the tube container 21, a radiation window adapter 24 for attaching the X-ray emission window 22 to the tube container 21, and the like.

The tube container 21 of this embodiment is the same as the tube container 3 of the prior art.
Similarly to the above, it is a metal container having an electric shock and X-ray proof structure, and a radiation window mounting portion 25 for mounting the X-ray radiation window 22 on the central side surface.
It has. In this embodiment, the X-ray emission window 22 is not directly attached to the emission window attachment portion 25, and the emission window adapter 24
This is different from the conventional example in that it is attached.

FIG. 2 is an enlarged view of a portion indicated by a circle A in FIG. 1, that is, a mounting portion of the X-ray emission window 22, which is a main part of the present embodiment. FIG. 2 (a) is a cross-sectional view of a mounting portion of the X-ray emission window, and FIG.
(B) is a top view thereof. In FIG. 2, a radiation window adapter 24 is attached to the radiation window attachment portion 25 of the tube container 21,
The X-ray emission window 22 is attached to the emission window adapter 24.

In FIG. 2, the radiation window mounting portion 25 of the tube container 21 is shown.
Has a structure substantially similar to that of the conventional tube container 3, and has a circular hole into which the X-ray emission window 22 is inserted at a central portion, and a hole for oil tightness.
A seal groove 29 for accommodating the O-ring 28 is provided, and the outer shape is substantially square.

The radiation window adapter 24 also has an X-ray radiation window at the center.
A circular hole into which 22 is inserted, and a seal groove 31 for accommodating an O-ring 30 for oil tightness are provided, and the outer shape is substantially square like the radiation window mounting portion 25. Emission window adapter 24
Is usually covered with a lead plate 32 for X-ray protection.

An upper surface 33 of the radiation window adapter 24 (hereinafter also referred to as a front surface of the X-ray radiation opening) 33 has a hole 36 for coupling with the radiation window mounting portion 25, and the X-ray tube device 20 is used for an X-ray device or the like. A screw hole 37 is provided for mounting or X-ray aperture. The coupling between the radiation window adapter 24 and the radiation window mounting portion 25 is performed by the screw 38 and the screw hole 39 provided in the radiation window mounting portion 25 via the hole 36. Oil tightness between the radiation window adapter 24 and the radiation window mounting portion 25 is achieved by an O-ring 28 provided in the seal groove 29.

The X-ray emission window 22 has a bowl shape with a deep recess, and is made of a heat-resistant epoxy resin which does not contain a filler like the conventional product. This X-ray emission window 22 is a radiation window adapter 24
Is fixed by a ring-shaped screw 40. Oil-tightness between the X-ray emission window 22 and the emission window adapter 24 is performed by an O-ring 30 provided in the seal groove 31.

In the first X-ray tube device, the radiation window adapter 24
Is attached to the upper surface of the radiation window mounting portion 25 of the tube container 21, the distance H ₁ between the focal point 2 e of the X-ray tube 2 and the front surface 33 of the X-ray radiation port of the X-ray tube device 20 becomes larger. Adapter 24 thickness G
Is increased by the amount corresponding to. As a result, the first
The X-ray tube device 20 is an X-ray tube 2 such as an X-ray circulatory diagnostic device.
Becomes a structure suitable for X-ray apparatus which requires a large size of distance H ₁ between the X-ray emitting opening front 33 of the focus 2e and the X-ray tube device 20.

FIG. 3 is an enlarged view of a mounting portion of an X-ray emission window, which is a main portion of the second X-ray tube device 43 of the present embodiment. Fig. 3 (a)
Fig. 3 is a cross-sectional view of a mounting portion of the X-ray emission window, and Fig. 3B is a top view thereof. In FIG. 3, the second X-ray tube device 43 of this embodiment is shown.
Is the same as the structure of the first X-ray tube device shown in FIG. 1 except for the structure of the mounting portion of the X-ray emission window.

In FIG. 3, a tube container 21 containing the X-ray tube 2 is shown.
Is the same as that of the first X-ray tube apparatus. Figure 3
In (a), the X-ray emission window 44 is in the shape of a shallow bowl with a recess, and is directly attached to the emission window attachment portion 25 of the tube container 21 as in the conventional product. Emission window mounting part 25 of X-ray emission window 44
The X-ray emission window 44 and the emission window mounting portion 25 are oil-tightened by a 0-ring 28 provided in a seal groove 29 provided in the emission window mounting portion 25. Have been done.

In FIG. 3B, the upper surface of the radiation window mounting portion 25 of the tube container 21 (hereinafter, also referred to as the front surface of the X-ray radiation port) 46.
A screw hole 37 used for attaching the second X-ray tube device 43 to an X-ray device or the like, or attaching an X-ray aperture, and a radiation window used for the first X-ray tube device A screw hole 39 for fixing the adapter 24 is provided.

In the second X-ray tube device 43, since the radiation window adapter 24 is not attached to the radiation window attachment portion 25 of the tube container 21, the focal point 2e of the X-ray tube 2 and the X-ray Emission port front 4
Distance of H ₂ between 6 a distance corresponding to the first X-ray tube device 20
It is smaller than H _1. As a result, the second X-ray tube device 4
3 is a focal point 2e of the X-ray tube 2 such as an X-ray CT device and the X-ray tube device.
43 becomes a structure suitable for X-ray devices requiring small size of the distance of H ₂ between the X-ray emitting opening front 46 of.

When the first X-ray tube device 20 of the present embodiment is compared with the second X-ray tube device 43, the first X-ray tube device 20
The radiation window adapter 24 is provided on the upper surface 46 of the radiation window mounting portion 25 of the tube container 21.
By the attached distance H ₁ between the X-ray emitting opening front 33 of the focus 2e and the X-ray tube device 20 of the X-ray tube 2, than that of the second X-ray tube device 43 (H ₂₎ It is getting bigger.

Shorter dimensions are required for the X-ray tube front surface and the CT device of the X-ray tube 2 corresponding to the upper surface of the radiation window mounting portion of the X-ray tube device or the upper surface of the radiation window adapter. Diagnostic devices require long dimensions.

For this reason, the first X-ray tube apparatus 20 of this embodiment
Suitable for combination with X-ray circulatory diagnostic apparatus since the H ₁ dimensions is large, the second X-ray tube device 43 is suitable for combination with the X-ray CT apparatus since the H ₂ small dimensions.

The front of the X-ray emission port of the above X-ray tube devices 20 and 43
The distance H between 33, 46 and the focal point 2e of the X-ray tube 2 depends on the use of the X-ray tube apparatus, and the difference between the maximum value and the minimum value is approximately 20.
There is ~ 30mm. Therefore, as the X-ray tube device having the minimum value of the distance H (for example, H ₂ ), the second X-ray tube device 43 without the radiation window adapter 24 is used, and the distance H is larger than H _2. As the X-ray tube device having (for example, H ₁ ), the first X-ray tube device 20 to which the radiation window adapter 24 having the appropriate thickness G is attached corresponds to the thickness G and X of the radiation window adapter 24.
By changing the radiation window according to the application of the X-ray tube device, an X-ray tube device suitable for each application can be manufactured.

[0036]

As described above, according to the present invention, X
An emission window adapter can be attached to the emission window attachment part of the tube vessel of the X-ray tube device, and an X-ray emission window can be attached to this emission window adapter. By replacing the radiation window, various types of X-ray tube devices can be manufactured, so that one type of tube container can be used for various types of X-ray tube devices.

As a result, the type of tube container can be reduced by sharing the tube container of the X-ray tube device having a different application, and the cost of the tube container can be reduced. Furthermore, X
The use of the same tube container can reduce the development cost of the tube container, shorten the development period, and the like even when the use of the wire tube device is changed.

[Brief description of the drawings]

FIG. 1 is an overall structural diagram of one X-ray tube device of a first embodiment of an X-ray tube device according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1;

FIG. 3 is an enlarged view of a main part of the other X-ray tube device of the first embodiment.

FIG. 4 is a structural example of a conventional X-ray tube device.

[Explanation of symbols]

 1,20,43… X-ray tube device 2… X-ray tube 2a… Anode (rotating anode) 2b… Cathode 2c… Envelope 2e… Focus 3,21… X-ray tube container (tube container) 4… Cable receptacle 4a ... Anode-side cable receptacle 4b ... Cathode-side cable receptacle 5 ... Stator coil 6,22,44 ... X-ray emission window 7 ... Insulating oil 8 ... Anode-side support 9 ... Cathode-side support 10 ... Stator insulation tube 11,25 ... Radiation window mounting part 12, 40, 45 ... Ring screw 13, 32, 34 ... Lead plate 24 ... Radiation window adapter 28, 30 ... 0 ring 29, 31 ... Seal groove 33, 46 ... Top surface (X-ray radiation port front) 36 ... hole 37, 39 ... screw hole 38 ... screw

Claims (3)

[Claims] An X-ray tube that generates X-rays, an insulating oil that insulates a high voltage supplied to the X-ray tube, an X-ray that contains the X-ray tube and the insulating oil, and insulates and supports the X-ray tube A tube container (hereinafter, referred to as a tube container), and an X-ray having an X-ray emission window for taking out X-rays to the outside of the tube container, wherein the tube container has an emission window mounting portion to which the X-ray emission window can be attached. A radiation tube apparatus, wherein a radiation window adapter is mounted on the radiation window mounting portion, and an X-ray radiation window is mounted on the radiation window adapter.
Wire tube device. 2. The X-ray tube apparatus according to claim 1, wherein the radiation window adapter is attached to a radiation window attachment portion of the tube container, so that an X-ray emission port front surface corresponding to an upper surface of the radiation window adapter and an X-ray emission port. An X-ray tube apparatus, wherein the distance between the focal point of the X-ray tube and the X-ray tube is elongated. 3. A tube container provided with an X-ray tube for generating X-rays and a radiation window mounting portion capable of accommodating an insulating oil for insulating a high voltage supplied to the X-ray tube and capable of mounting an X-ray radiation window. 3. The tube container according to claim 1, wherein the radiation window mounting portion is configured to be capable of mounting a radiation window adapter to which an X-ray radiation window can be mounted.