JPS6228558B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable X-ray generator used for rounds and on-site medical examinations in hospitals and the like.

Portable X-ray generators are also called closed-type X-ray generators, and contain a high-voltage transformer and a wire heating transformer in the same container as the X-ray tube, eliminating the need for cables connecting them. It is used by being suspended from the tip of the flexible arm. Therefore, many efforts have been made to reduce the size and weight of heavy transformers, tubes, and all other components. has been created and widely used. However, the configuration of these current portable X-ray generators is based on the current technology for each of the three main components: the tube, high voltage transformer, and wire heating transformer (hereinafter simply referred to as heating transformer). It was designed to be compact and lightweight, and to store these independent items in a compact manner.In terms of storing these three types of major equipment, it is no different from the early portable type when it was developed. It is not. This is currently an obstacle in making portable (also called mobile) X-ray generators smaller and lighter.

This invention was made in view of the above-mentioned current situation, and by breaking away from conventional preconceptions and developing a heating transformer that is integrated with the tube, the space that was previously occupied individually can be significantly reduced. By slightly improving the efficiency of this heating transformer and reducing the weight of the iron core, the X-ray generator can be made smaller and lighter, and the holding mechanism that supports it can be simplified, making it easier to operate and making it an inexpensive portable (mobile type). ) aims to provide X-ray equipment. That is, the present invention provides a portable X-ray tube, which is constructed by accommodating a cylindrical X-ray tube, a wire heating transformer for the X-ray tube, and a high voltage transformer in a sealed container, and sealing insulating oil therein. In the ray generator, the filament heating transformer is disposed concentrically with the X-ray tube with an insulator interposed around the outer periphery of the X-ray tube, and is arranged in an X-ray emission window of the X-ray tube. An inner cylindrical laminated core having holes formed in corresponding positions is disposed concentrically with the X-ray tube at a predetermined distance from the inner cylindrical laminated core in the radial direction, and is arranged concentrically with the X-ray tube. an outer cylindrical laminated core in which a hole is formed at a position corresponding to the radiation window; a pair of annular laminated cores in which the respective ends of the inner and outer cylindrical laminated cores are joined together to form a magnetic path; Wound in the circumferential direction between the inner and outer cylindrical laminated cores with an insulator interposed between them,
The present invention relates to a portable X-ray generator characterized in that it is constructed as an external iron transformer comprising a primary winding and a secondary winding that are insulated from each other.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a portable X-ray generator according to an embodiment of the present invention mounted on a mobile cart. It can also be used to see through. 1 is a trolley, 2 is a main column of the apparatus, 3 is an X-ray controller, 4 is a flexible arm, and 5 is a portable X-ray generator according to the present invention. FIG. 2 is a diagram showing the structure of the portable X-ray generator described in No. 5 above, in which the figure is a side external view and the figure is a partial sectional view of the front. 4
A is the X-ray generator support arm at the tip of the flexible arm, 6 is X
The ray generator outer box, 7 is an X-ray irradiation port ring, 8A is a winding part of a high voltage transformer 8, and 8'B is its iron core. Reference numeral 9 denotes a heating transformer, which is a feature of the present invention, and encloses a tube 10 shown by a dotted line in its center. 10
C is its X-ray emission port, 11 is a conical lid for sealing the oil fill port 14A of the X-ray generator inner container 14, which will be described next.
It is made of a material with better X-ray transmittance than the inner container 14. 12 is a filter, and 13 is an X-ray mask.
Reference numeral 14 denotes an inner container of the X-ray generator, which supports the main transformer 8 and the heating transformer 9 containing the bulb 10, and seals transformer oil O for insulating and cooling them. Dotted lines 6' and 14' in the figure show the shapes of the outer case and inner container of a conventional X-ray generator, and 9A', also shown in dotted lines, is the winding of a conventional heating transformer, and 9B' is its core. . By forming the heating transformer 9 in which the independent heating transformers 9A' and 9B' are coaxially enclosed with the tube 10, the inner container 14 and the outer case 6 are shaped as shown by the solid line. The volume can be reduced by about 6 to 8%. Next, the structure of the bulb-encased heating transformer 10, which is a feature of the present invention, will be explained with reference to FIG.
FIG. 3 is an upside-down view of the heating transformer 9 of FIG. 2, with the X-ray emission port 9C facing upward, with the upper part partially in section. 10 is a tube, for example, a fixed anode type, 1.5 mm for focal diagnosis, outer diameter of about 50 mm, length of about 150 mm.
It is a small tube of mm. 10A is the tube terminal (anode), and 10C, indicated by the X mark in the center, is the center of the X-ray emission window of the tube. A hole 15 having a diameter of approximately 20 mm is drilled in each of the parts described below, as shown in the figure, centered around this hole 10C. Reference numeral 16 denotes an insulating tube made of a synthetic resin material such as epoxy resin, which insulates the tube 10 and the heating transformer core, and also has retaining plates 18A, 18.
It is mechanically engaged with B and serves as the core of this heating transformer configuration. That is, the left end flange 16A is fitted with the retaining plate 18A, and the male threaded part of the other end 16B is screwed into the tightening ring 19, thereby tightening the retaining plate 1.
Between 8A and 18B, transformer core parts 17A and 17B,
Tighten and fix 17C. The holding plates 18A and 18B are made of an insulating material such as phenolic resin, have female threads on their straight surfaces, and are supported by the X-ray generator board 20 in FIG. 2 as shown. Reference numeral 21 indicates a polycarbonate resin screw, and 2
The polycarbonate resin screws 21 are screwed into the female screws installed at 90° angles to each other, and then passed through the through holes (not shown) formed in the insulating cylinder 16. By pressing the outer circumferential surface of the tube 10 with the tip of each polycarbonate resin screw 21, the tube 10 is fixed to the insulating tube 16 from above by pressure in the state shown in the drawing. The iron core is, for example, a laminate of grain-oriented silicon steel plates with a thickness of 0.23 mm, and 17A and 17C are both cylindrical iron cores formed concentrically with the tube 10.
Reference numeral 17B is an annular core that forms a magnetic path at both ends of the cylindrical cores 17A and 17C. Cylindrical core 17
An X-ray shielding cylinder 22 made of a lead plate is arranged on the outer periphery of C, and its thickness is equal to that of the cylindrical iron core 17.
Since A and 17C have an X-ray shielding effect, they can be made thinner by an equivalent amount, so it is sufficient to make the material less than 1/2 that of conventional products, which also has the effect of reducing weight. are doing. The above configuration is a unique outer iron type core that minimizes the core cross-sectional area of the transformer and enhances the effect, which is a feature of the present invention. 23 is the primary winding, which normally applies 100V AC (some 200V), and 24 is the secondary winding, which is generally rated at 2 to 5 V AC and 2 to 5 A for heating the tube wire. , since the high voltage of the tube is applied to this, this and the primary winding 23 and iron core 17
The insulator between A, 17B, and 17C requires a material with high dielectric strength. The insulators 25A and 25B are made of a synthetic resin material such as Delrin, and first, the insulator 25A is fitted onto the cylindrical core 17A, and the primary winding 23 and the secondary winding 2
4 and then covering it with the insulator 25B is used, but the material and method are not necessarily limited to the above materials and methods, and methods such as casting polyester resin or epoxy resin can also be applied.
26 is a secondary winding outlet insulating cylinder, and the primary winding outlet is located in a part of the holding plate 18A that is not shown.

The above is a description of the envelope heating transformer and the portable X-ray generator using the same according to the embodiment of the present invention, but the present invention is not limited to the illustrations, their dimensions, ratings, and materials. Needless to say. Moreover, even when applied not only to small-sized X-ray generators but also to medium-sized X-ray generators, the present invention can be made smaller and lighter than conventional ones.

This invention is constructed as described above, and by enclosing the tube of a portable X-ray generator, which is required to be small and lightweight, into the original outer iron core of a heating transformer, it is possible to replace the conventional one. By making the lead-shielding cylinder of the tube thinner, eliminating the need for a dedicated tube cover and its holder, and improving the effective use of core material, i.e. efficiency, compared to the inner iron core of conventional heating transformers. In order to reduce weight and price, the X-ray generator as a whole uses fewer parts, has a smaller shape, and is easy to assemble and lightweight. This simplifies the holding mechanism such as the flexible arm, making it easy to operate This could have provided the X-ray generator for the device.

[Brief explanation of the drawing]

FIG. 1 is an external view of a cart-equipped X-ray device for rounds using a portable X-ray generator according to the present invention, and FIG. 2 is a side external view showing the structure of the portable X-ray generator. FIG. 3, a partial front sectional view, is a structural explanatory diagram of a tube-encased heating transformer, which is a feature of the present invention. 5...Portable X-ray generator, 9...Tube-encased wire heating transformer, 10...X-ray tube, 10C...X
Center of X-ray emission window of ray tube, 9A'...Conventional heating transformer winding, 9B'...Conventional heating transformer core (inner iron type), 17A, 17C...Cylindrical laminated core, 1
7B...Annular laminated iron core, 23...Primary winding (AC100V or 200V), 24...Secondary winding (low voltage winding).

Claims (1)

[Claims] 1. In a portable X-ray generator in which a cylindrical X-ray tube, a wire heating transformer and a high voltage transformer of this X-ray tube are housed in a sealed container, and insulating oil is sealed. , the filament heating transformer is arranged concentrically with the X-ray tube with an insulator interposed around the outer periphery of the X-ray tube, and at a position corresponding to the X-ray emission window of the X-ray tube; an inner cylindrical laminated core in which a hole is formed, and an inner cylindrical laminated core arranged concentrically with the X-ray tube through a predetermined interval in the radial direction from the inner cylindrical laminated core, and arranged in an X-ray emission window of the X-ray tube. an outer cylindrical laminated core with holes formed in corresponding positions, a pair of annular laminated cores whose respective ends are joined to each other to form a magnetic path; It is characterized by being configured as an external iron type transformer consisting of a primary winding and a secondary winding that are wound circumferentially between cylindrical laminated cores with insulators interposed between them, and are insulated from each other. A portable X-ray generator.