JP2007324013A - Rotary anode x-ray tube device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an increase in weight of an X-ray tube device and reduce an adverse effect on the operability of an X-ray fluoroscopic imaging apparatus by solving a problem that, in the X-ray tube device a bellow for absorbing an increase in volume induced by a temperature rise of an insulating oil is attached to a side surface of an X-ray tube container and a space for the bellow is ensured as an extension space, and accordingly the side surface of the X-ray tube container is extended by the space, which leads to an increase in weight of the X-ray tube container or a lead plate for preventing X-ray leakage, and eventually to an increase in weight of the X-ray tube device. <P>SOLUTION: Balloon-shaped bellows 10 and 11 made of rubber are provided inside the X-ray tube container 2 at positions each ensuring an insulating distance from a high voltage application part such as a high voltage socket 4 or 5. The bellows 10 and 11 are formed into a shape conforming to the respective spaces and have ventilating openings having inner spaces that communicate with the outside of the X-ray tube container 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an X-ray tube apparatus including an X-ray tube container and an X-ray tube enclosed and disposed therein.

As shown in FIG. 3, the X-ray tube device is filled with an insulating oil 6 by fixing the X-ray tube 1 by an X-ray tube holding portion 3 or the like in an X-ray tube container 2 usually made of an aluminum casting or the like. In this configuration, X-rays are generated by applying a high voltage to the X-ray tube 1 from the outside via the high-voltage sockets 4 and 5. A lead plate 9 is laid inside the X-ray tube container 2 to prevent leakage of X-rays not related to radiography, and the temperature of the insulating oil 6 is increased due to heat generated by an anode (not shown) of the X-ray tube 1. A bellows 7 of a bowl-shaped rubber molded product is attached to the side surface of the X-ray tube container 2 in order to absorb the amount of rising and increasing volume, and a bellows space 8 is provided as an expansion space (for example, a patent) Reference 1).
JP 09-92188 A

  As described above, in the X-ray tube apparatus, the bellows 7 is usually attached to the side surface of the X-ray tube container 2 in order to absorb the increase in volume due to the temperature rise of the insulating oil 6, and the bellows space 8 as an expansion space thereof. Therefore, the X-ray tube container 2 is extended in the longitudinal direction, and the weight of the X-ray tube container 2 and the lead plate 9 is increased, which eventually leads to an increase in the weight of the X-ray tube apparatus. The increase in the weight of the X-ray tube apparatus usually greatly affects the operability of the X-ray fluoroscopic apparatus. In particular, in the case of a mobile device such as an X-ray device for round trips, an increase in the weight of the entire mobile device due to an increase in the weight of the X-ray tube device is a heavy burden when an operator moves the device. In addition, the tomographic and circulatory imaging devices that perform imaging by moving the X-ray tube device and the X-ray receiving unit around the subject move the X-ray tube device at a high speed necessary to improve image quality. Makes it difficult to shorten the imaging time, and the arm that holds the X-ray tube apparatus must have greater strength and rigidity, and the output of the motor that supplies the power to move the X-ray tube apparatus is larger The need for things has led to an increase in the size of the entire fluoroscopic imaging apparatus. The present invention is to improve the operability and miniaturization of the above-mentioned X-ray fluoroscopic apparatus, and further improve the image quality of tomographic images by shortening the imaging time by moving the X-ray tube apparatus at high speed. The object is to reduce the weight of the X-ray tube device.

  In order to achieve the above object, an invention according to claim 1 is an X-ray tube device in which an X-ray tube is sealed in an X-ray tube container filled with insulating oil. The X-ray tube container is made of rubber. Provided is an X-ray tube device that fixes a bellows shaped like a balloon so that air inside the bellows can enter and leave the space outside the X-ray tube container.

  In order to achieve the above-mentioned object, the invention according to claim 2 is an insulating distance from the high voltage application section even if one or a plurality of bellows molded into a rubber balloon are expanded or contracted in the X-ray tube container. The X-ray tube apparatus according to claim 1, wherein the length of the X-ray tube container is shortened by disposing the insulating oil at a position where it can be secured and absorbing expansion of the insulating oil by contraction of the bellows.

  According to the present invention, the length of the X-ray tube container can be shortened as compared with the conventional case, so that the weight of the X-ray tube device can be reduced. As a result, the operability of the X-ray fluoroscopic apparatus equipped with the X-ray tube device can be reduced. It is possible to prevent deterioration and enlargement, and to improve image quality in tomography equipment and circulatory photography equipment that takes images by moving the X-ray tube device and X-ray receiver around the subject. Therefore, the imaging time can be shortened by the high-speed movement of the X-ray tube apparatus necessary for this.

  An embodiment of the present invention will be described with reference to FIGS. 1 are the same as those in FIG. 3, and the description thereof is omitted. As shown in FIG. 1, a bellows 10 or a bellows 11 of a balloon-like rubber molded product that has been molded into a shape suitable for each space in advance exists, for example, in relation to the arrangement of the high voltage socket 5 for the bellows 10. Conventionally, a dead space filled with insulating oil, or a bellows 11, such as a dead space near the ground potential near the X-ray tube holding unit 3, has a high voltage socket 4 or 5 inside the X-ray tube container 2. As shown in FIG. 2, the vent fitting 12 attached to a part of the X-ray tube container 2 is passed through the hole provided in the X-ray tube container 2 and the nut 13 is used for the X. While being fixed to the tube container 2, the O-ring 14 prevents the insulating oil 6 from leaking from the hole to the outside. Since the vent 15 is provided at the center of the vent fitting 12 so as to connect the space inside the balloon-shaped bellows 10 or 11 and the atmosphere outside the X-ray tube container 2, the bellows 10 or 11. When the temperature of the insulating oil 6 rises and its volume increases, it is compressed by the insulating oil 6, but then returns to its original shape as the temperature of the insulating oil 6 decreases and its volume decreases. To work.

  As described above, the bellows 10 and 11 having a shape that can be arranged in a space that has existed as a conventional dead space inside the X-ray tube container 2 and that is filled with the insulating oil 6 are disposed in the X-ray tube container 2. The length of the X-ray tube container 2 can be shortened as compared with the conventional method in which the bellow space 8 is secured in the space obtained by extending the length. As a result, the weight of the X-ray tube apparatus is reduced, so that deterioration of the operability and enlargement of the X-ray fluoroscopic apparatus equipped with the X-ray tube apparatus can be prevented, and the X-ray tube apparatus and the X-ray light receiving unit can be prevented. In a tomography apparatus or a circulatory imaging apparatus that performs imaging while moving the subject around the subject, it is possible to reduce imaging time by high-speed movement of the X-ray tube apparatus necessary for improving image quality it can.

  The present invention relates to an X-ray tube apparatus including an X-ray tube container and an X-ray tube enclosed and disposed therein.

It is a figure which shows the structural example of the X-ray tube apparatus by this invention. It is a figure which shows the example of the fixing method of the bellows by this invention. It is a figure which shows the structural example of the conventional X-ray tube apparatus.

Explanation of symbols

1: X-ray tube 2: X-ray tube container 3: X-ray tube holder 4: High voltage socket 5: High voltage socket 6: Insulating oil 7: Bellow 8: Bellow space 9: Lead plate 10: Bellow 11: Bellow 12 : Vent fitting 13: Nut 14: O-ring 15: Vent

Claims (2)

In an X-ray tube device in which an X-ray tube is sealed in an X-ray tube container filled with insulating oil, a bellows formed in a rubber balloon shape is placed inside the X-ray tube container. An X-ray tube device, wherein the X-ray tube device is fixed so as to be able to enter and leave the space outside the X-ray tube container. One or a plurality of bellows formed in the shape of a rubber balloon are arranged at positions where an insulation distance can be secured from the high voltage application section even if the bellows is expanded or contracted in the X-ray tube container. The X-ray tube apparatus according to claim 1, wherein the length of the X-ray tube container is shortened by absorption by contraction.

Images