JPS61259497A - X-ray tube device - Google Patents

Abstract

PURPOSE:To enable an X-ray tube of great capacity to be naturally installed without increasing the size of the X-ray tube container by installing the bellows in the external pipe in order to adsorb the thermal expansion or contraction of insulating oil. CONSTITUTION:An X-ray tube 1 is installed in a tube container 2 through insulating oil 3 circulating through an external pipe such as an oil cooler 13. A bellows 7 is installed in the external pipe in order to absorb the thermal expansion or contraction of the insulating oil 3. Due to the above structure where the bellows 7 is not installed in the tube container 2 and installed in the external pipe, there is no possibility that the bellows 7 is broken by electric discharge. Therefore, it is possible to naturally install an X-ray tube of great capacity without increasing the size of the X-ray tube container 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is in the field of X-ray diagnostic equipment, and relates to an Xa tube device that generates X-rays.

[Technical backing of the invention and its problems] ° The X-ray tube device has a container that houses the X-ray tube that is electrically shielded, provides a specified X-ray shield, connects the high-voltage cable for X42, and operates the XIIA tube. An X-ray tube device containing an X-ray tube enclosed in an X-ray tube container is conventionally called an X-ray tube device.

FIGS. 3 and 4 show schematic cross-sectional views of conventional X-ray tubes.

The xiw pipe shown in Fig. 3 represents the oil-cooled type, and the xiw pipe shown in Fig. 4 represents the 3
This method is called a forced oil cooling method and is a method of strongly cooling the insulating oil of the oil-cooled X-ray tube shown in the figure.

In recent years, the capacity of XIIQ tubes has been increasing.Increasing the capacity naturally requires the development of materials, but even if new materials are used, for example, the weight and volume of the anode target of The current situation is that an increase in
However, the space on the gantry of, for example, a CT scanner in which a large-capacity X-ray tube is mounted is limited, so there is currently an urgent need to develop a large-capacity X-ray tube without increasing the size of the container. However, in order to fit the Hitoyoshi ω-type X-ray tube into a container with the same or similar volume as the conventional one, efforts were made to shorten the insulation distance and compress the stator coil, but there were limitations, and recent large-capacity X-ray tubes Due to these disadvantages, the tube bag U has poor pressure resistance and is also destroyed by oil heat, making it a low-volume type X.
This is becoming more likely to occur compared to wire tube devices. In addition, pressure failure is likely to occur in the container between the cathode and the bellows, and if discharge occurs here, a hole will be created in the bellows, making the X-ray tube device immediately unusable. If a CT device were used to transport images of a subject, there was a risk that the heated insulating oil would come into contact with the irradiated area of the subject, which could lead to a major accident.

[Object of the Invention] The present invention was made in view of the circumstances described above, and an object of the present invention is to provide an X-ray tube device that can easily mount a high-volume X-ray tube without increasing the size of the container that houses the X-ray tube. purpose.

"Summary of the Invention" The outline of the present invention to achieve the above object [1] is that a tube container body and an oil cooler device for cooling insulating oil filled in the tube container are connected by piping. X of composition
The wire tube device is characterized in that a bellows for absorbing expansion and contraction of the insulating oil due to temperature changes is provided in the external piping system.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic sectional view of an X-ray tube device and an oil cooler device, which are one embodiment of the present invention. In the same figure,
The X-ray tube 1, the stator 8 for rotating the rotating anode housed in the X-ray tube 1, and the cable receptacles 5 and 6 for supplying power to the anode and cathode of the X-ray tube 1, A tube container body 2 is filled with insulating oil 3 for cooling the X-ray tube 1, and a radiation port 4 is provided in the tube container body 2 to take out the X-rays generated in the X-ray tube 1. . Further, the tube container body 2 has an outlet 1 for sending out the insulating oil 3 to an oil cooler device 13 for cooling.
4, provided between the outlet 14 and the cooler 10,
A bellows 7 is provided to absorb expansion and contraction of volume due to temperature changes of the insulating oil 3, and a cooler 10 and a cooling fan 8 are provided to cool the insulating oil 3 that has become high in temperature in the tube container body. , a pump 11 for circulating the insulating oil 3, and an inlet 15 for returning the cooled insulating oil 3 discharged from the pump 11 to the main piping container body 2. One side has an air inlet/outlet and is open to the atmosphere.

According to the above configuration, first, the insulating oil 3 filled in the tube container main body is guided through the pump 11 through the outlet 14 and transferred to the cooler 10, where the temperature is lowered by the cooling fan 9 and then Then, it passes through the pump 11 and is introduced into the tube container body again to suppress the temperature of the X-ray tube 1. Further, the bellows 7 is used to cope with a change in the volume of the insulating oil 3 itself due to a change in the temperature of the insulating oil 3, and to pull the X-ray tube device and the oil cooler device 13 due to abnormal arm temperature of the insulating oil 3. It is configured to be damaged.

The bellows 7, which was conventionally provided in the tube container body 2 to absorb the expansion and contraction due to temperature changes of the insulating oil 3, is now provided in the oil cooler device @13 external to the tube container body 2. If you build in an X-ray tube with the same container as the X-ray tube, you will not only be able to make the tube container body smaller, but also have a larger
It is also possible to mount the wire tube without increasing the size of the tube container body. Furthermore, by moving the bellows between the cathode and the bellows, which tend to cause poor pressure resistance, from the tube container body to the external system path, the poor pressure resistance can be eliminated. In addition, in order to keep the tube container itself compact while increasing capacity, it is possible to reduce the insulation distance, reduce the problem of increased defective rate caused by compressing the stator coil, etc. Normally, the bellows is designed to break when the tube expands abnormally due to a rise in temperature. If the bellows were to break when the specimen was being shaded, there was a possibility that the high-temperature insulating oil would come into contact with the specimen, but this problem can be solved by placing the oil cooler in an arbitrary location by increasing the length of the piping. Because it is possible, it can be solved.

Furthermore, in the past, when installing a large-capacity X-ray tube device on the gantry of a CT system, for example, a major design change was required in order to incorporate the large-capacity X-ray tube device into the conventional gantry. Since the tube container main body is made compact as described above, it is greatly alleviated, and the only necessary design change is a small change related to the installation of the oil cooler, resulting in a significant improvement.

FIG. 5 shows a front view of the gantry 22 in which the X-ray tube is mounted. In the figure, the gantry 22 includes a base 23 for mounting on a floor (not shown), a rotation frame 21 rotatably provided on the gantry, an X-ray tube 1 provided at the head of the rotation frame 21, This X-ray tube 1 and the i-shadow 1t24 are placed in the opposite position ().
-6, which consists of a detector 20 with a rotation frame 21 and a cooler 10 provided on the side of the rotation frame 21.

Furthermore, the illustrated cooler 10 is not limited to the side of the rotation frame 21, but can also be provided at the bottom of the rotation frame 21, for example.
Since a flexible layout is possible, it is possible to mount a large-capacity X-ray tube while using the conventional gantry.

The present invention is not limited to the one embodiment described above, but can be implemented with various modifications within the scope of the gist of the present invention. For example, as a modified example, FIG. 2 shows a schematic sectional view of an X-ray tube device and an oil cooler device. As shown in the figure, the cooler 10 may be water-cooled to lower the temperature of the insulating oil 3, and instead of the bellows, a device that can expand and contract within the range of temperature changes of the insulating oil 3 may be installed in the middle of the piping, for example. Volume changes due to temperature changes in the insulating oil 3 may be absorbed by inserting a rubber tube or the like.

[Effects of the Invention] As detailed above, the present invention provides a bellows that is conventionally provided in the tube container body to absorb the expansion and contraction caused by the temperature of the insulating oil, but is provided in the external path, thereby achieving a larger capacity than before. It becomes possible to mount an X-ray tube in the tube container body.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an embodiment of the X-ray tube device and oil cooler device of the present invention, FIG. 2 is a schematic cross-sectional view of a modification of the embodiment shown in FIG. 1, and FIGS. Each figure is a schematic sectional view of a conventional X-ray tube device, and FIG. 5 is a front view of a gantry on which an X-ray tube is mounted. 1...xi tube, 2...tube container body, 3...insulating oil, 4...radiation port, 5...cable receptacle (+
), 6... Cable reception (-), 7... Be0
- 8...Stator, 9...Cooling fan, 10.
... Cooler, 11... Pump, 12... Air inlet/outlet, 13... Oil cooler device, 14... Outlet,
15... Inlet, 15... Water tank, 20... Detector, 21... Rotation frame, 22... Gantry, 23... Base, 24... I
I hole. Agent: Patent Attorney Noriyuki Chika (and 1 other person) (10) (
-) 4th μs Fu -21 Tori

Claims (1)

[Claims] In an X-ray tube device configured such that a tube container body and an oil cooler device for cooling insulating oil filled in the tube container are connected via piping, expansion and contraction of the insulating oil due to temperature changes is absorbed. An X-ray tube device characterized by having a bellows installed in an external piping system.