JP2010073477A - X-ray tube housing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein an X-ray tube housing container has a complicated shape because of a structure of a connection terminal or the like for connecting an inside and outside of the container, and is generally formed by casting, and as it is very important to shield unnecessary scattered X-rays and lead is adhered to fit to the shape, it requires skill, and it is necessary to sufficiently consider ease of operation and industrial safety and health because several pieces of lead are welded with a burner. <P>SOLUTION: The unnecessary X-rays are functionally shielded by mounting band-like lead on a separated main structure and component and assembling them. By using a standard pipe in the main structure to facilitate attachment of the lead, and by utilizing characteristics of the pipe, the X-ray tube can be easily housed in the container to eliminate a mold cost and greatly reduce cost. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is an X-ray tube storage container used for medical and industrial examinations, and belongs to the field of manufacturing technology thereof.

The X-ray tube needs to shield harmful X-rays that are scattered, and the container is often made of a metal made of a cylinder with a shielding material such as a lead plate attached thereto. FIG. 1- (a) is a cross-sectional view of the X-ray tube stored in a container. FIG. 1- (b) is a sectional view of the container itself. The container is generally manufactured by casting as described above. Casting is common because it depends on the shape of the mounting parts necessary for securing a power circuit, a cooling circuit, an X-ray output optical path, and the like to the X-ray tube, and thus becomes a complicated shape. Cast products also dominate in terms of container size and number of lots. However, the number of lots tends to decrease, and the production trend tends to be high for various types of production.

FIG. 2 shows a method of reducing the cost of the container by reducing the machining man-hour as well as the material by dividing the core into two parts to suppress the height even a little, thereby eliminating the machining allowance. From the standpoint of production design, a method using a standard pipe as the main structure of the container is more effective. The problem is how to securely attach components such as electrode terminals to the pipe wall.

As an example of the above, FIG. 3 uses a steel pipe, and terminal attachments are provided on the lids at both ends of the pipe. The high-voltage transformer itself is stored in the pipe. However, in this case, although there is a merit of integration, the container becomes large and limited to special applications. Furthermore, as a container for an X-ray tube, it is sometimes necessary to give sufficient consideration to measures against shielding X-rays that are scattered. In the case of a container, it is necessary to affix an X-ray shielding material such as lead on the inner wall.

Patent Publication 9-237601 FIG. 4 is a cross-sectional view of the current lead-in-bonding. Affixing 1 is an affixing part centered on the X-ray emission part, and affixing 2 shows an affixing part centered on the electrode terminal attachment part. Careful attention is required for welding the joint portion of the lead material, in particular, the joint portion between the rings in the pasting 2. In the first place, when we regard lead welding itself as an environmental problem, we must pay close attention to the occupational health law, including the health management of workers. As a result, the cost is increased, the work of skilled workers, and the places where processing can be performed are limited.

The problem to be solved is when using standard pipes for the main structure of the container, how to securely attach the terminals for creating circuits inside and outside the container to the pipe wall, and the X-ray shield for normal work It is how safe it can be pasted even in the environment.

In the present invention, an inexpensive standard pipe is provided with a part mounting hole on the pipe wall surface, and the shielding material is X-ray shielded without welding.

Since there is no welding when attaching shielding materials such as lead, harmful lead vapor is not generated, so there is a significant improvement in terms of workplace safety and health. Use standard pipes and do not require molds, so use inexpensive containers. A large cost reduction is expected especially in the production of various small quantities.

Terminals can be attached to pipes using a variety of materials using screws and nuts. At this time, the seal of the pipe attachment part functions sufficiently even when ductile metal, rubber, sealant or the like is used. More reliable shielding can be realized by combining a cylindrical lead plate for shielding harmful X-rays.

FIG. 5 is an embodiment of the present invention, and illustrates the overall configuration of the container and the attachment parts such as terminals. FIG. 6 is a cross-sectional view of the X-ray tube 1 stored in a container. The main body of the container has a standard pipe 2 as a main structure. In order to oscillate the X-ray tube 1, high voltage electricity and effective X-rays are taken out from the outside and exchange with the outside such as a window is necessary, and the container needs these entrances. Therefore, the pipe 2 has holes necessary for these in advance. In FIG. 6, since the electrode terminal 5 is integrated with the re-sector pull 4, it is directly attached to the holder 3. The holder 3 is in the form of a pipe, and in this case, the holder 3 is joined to the pipe 2 by welding. Scattering harmful X-rays is shielded by the lead shielding tube A6 located on the inner wall of the pipe 2 and the lead shielding tube B7 attached to the outer periphery of the re-sector pull 4 as shown in FIG. . Since these leads are preliminarily made with necessary dimensions and holes, the conventional lead is not melted and joined, so it is an extremely safe method from the viewpoint of occupational safety and health.

As for the positional relationship between the oscillation focus of the X-ray tube 1 and the container, since the main structure is a pipe, the roundness of the inner wall is the same as that of machining, and processing is unnecessary again. Here, the pipe fixing socket 9, the pipe fixing column 10 and the pipe fixing rubber link 8 are used for alignment.
By the way, each part is attached to the pipe, but the method of attaching through the holder 3 welded to the pipe as shown in FIG. There is no use. That is, it is not wasteful that the electrode terminal 5 and the X-ray radiation window are directly attached to the pipe 1. These are shown schematically in FIG. A cross-sectional view is shown in FIG. An example of the details of the fastening is shown in FIG. Fastening is performed with a perforated bolt 12 and a nut 14. Instead of the perforated bolt 12, an electric sewing tube having a threaded outer periphery may be used. Here, the lead shielding tube B 7 is laid on the inner wall of the bolt 12. The shielding material may be not only a tubular material but also a belt-shaped material.

The minimum required outer diameter is desirable for the attachment terminal to the pipe, considering the degree of adhesion. However, when it becomes a certain size, there is a risk of leakage due to the curvature of the pipe 2. FIG. 8 is a view when a lead material as a packing material is inserted between washers. Since lead is ductile, it can be used as a filler as well as shielding harmful X-rays. Of course, a synthetic rubber plastic packing material or a sealant may be used. To further increase the degree of adhesion, there are (a) turtle washers (b) plastic deformation (c) counterbore processing and the like as shown in FIG.

The target container can be widely applied not only when there is a circulating oil port for cooling, but also to a small X-ray tube container that needs to be shielded.

A conventional general X-ray tube and its container, (a) is a sectional view and (b) is a sectional view of only the container. It is sectional drawing of the casting container using a two-stage type core. It is an example of the container using a steel pipe. It is a lead pasting figure in a conventional product. In the conceptual diagram when a standard pipe is used as the main structure, the fastening of parts is explained by a screw and nut method. It is sectional drawing of the container which stored X-ray tube using this invention. It is sectional drawing of the fastening by a screw and a nut. It is sectional drawing when inserting a packing material and fastening components. It is explanatory drawing of the method of closely_contact | adhering with respect to a curvature surface. (A) Tortoise (b) Plastic deformation (c) Counterbore processing 1 is a cross-sectional view of an X-ray tube containing a structure having a structure for directly attaching a component to a pipe using the present invention. The example of the attachment position of the lead shielding tube B is shown.

Explanation of symbols

1 X-ray tube 2 Pipe (main structure)
3 Re-sector pull holder 4 Re-sector pull 5 Electrode terminal 6 Lead shield tube A
7 Lead shielding tube B
8 Tube fixing rubber link 9 Tube fixing socket 10 Tube fixing column 11 Tube fixing lid
12 Holed bolt 13 Washer 14 Nut 15 Packing material 16 X-ray radiation window

Claims (3)

An X-ray tube containment vessel for protecting the tube and ensuring safety in use. Its main structure is a pipe, its inner wall is used for reference positioning of the X-ray tube, and a through hole or holder is attached to the pipe wall. X-ray tube containment vessel with a special structure. When a terminal or an X-ray transmission window necessary for a connection circuit between the X-ray tube and the outside is fastened with a screw and a nut, a sealing agent or a ductile X-ray shielding material is used for sealing with the pipe wall. The X-ray tube storage container according to claim 1. Covering the walls of the container and the parts or parts holders attached to the wall with a striped or cylindrical shield material to prevent harmful X-ray leakage, complement each other with the shielding function X-ray tube containment vessel with a structure to meet each other.