JPS6227519B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed portable X-ray generator that is used during hospital rounds, on-site consultations, or for dental purposes.

A sealed portable X-ray generator has a high voltage transformer (main transformer) and a wire heating transformer (heating transformer) housed in the same container as the X-ray tube, and a cable connecting them in a sealed, fully oil-immersed system. This device is used by being suspended from the tip of a flexible arm of a holder with a trolley or a rotary arm of a dental full-mouth X-ray device. Therefore, efforts have been made to reduce the size and weight of heavy transformers, tubes, and all other components. X-ray generators have been built and are in use. However, the configuration of these conventional X-ray generators is
Each of the three major types of equipment, the main transformer and the heating transformer, has been individually made smaller and lighter using the latest materials and technology, and these miniaturized independent machines are housed together. As described above, miniaturization of the three types of equipment has almost reached its limit in current technology, and therefore, the current method of miniaturizing each equipment individually has not been possible in this type of X-ray generator. It is not possible to meet the demand for a smaller and lighter product.

This invention was made in view of the above-mentioned current situation, and was based on the idea of eliminating the space between each device that could not be reduced with the conventional configuration of a collection of independent devices.
By adopting an original configuration in which the heating transformer and the main transformer are concentrically integrated in a manner that encloses the wire tubes, the container that houses them can be made significantly smaller.
It also eliminates the need for a lead cover for X-ray protection, reduces the weight of each transformer's core, making it much smaller and lighter than conventional transformers, and simplifies the holding mechanism that supports it and makes it easier to operate. The present invention aims to provide an X-ray generator that has a great effect on That is, the first invention accommodates a cylindrical X-ray tube, a wire heating transformer of the X-ray tube, and a high voltage transformer inside a sealed cylindrical housing box, and also seals insulating oil. In the sealed portable X-ray generator, the X-ray tube is disposed in the center of the cylindrical housing box with their axes aligned with each other, and the filament heating transformer is connected to the X-ray tube. an inner cylindrical laminated iron core arranged concentrically with the X-ray tube with an insulator interposed around the outer periphery of the tube, and having a hole formed at a position corresponding to the X-ray emission window of the X-ray tube; An outer cylindrical laminated core is arranged concentrically with the X-ray tube at a predetermined interval in the radial direction from the inner cylindrical laminated core, and has a hole formed at a position corresponding to the X-ray emission window of the X-ray tube. A laminated core, a pair of annular laminated cores whose respective ends of the inner and outer cylindrical laminated cores are joined together to form a magnetic path, and an insulator interposed between the inner and outer cylindrical laminated cores, respectively. wrapped in the circumferential direction,
The transformer is configured as an external iron type transformer consisting of a primary winding and a secondary winding that are insulated from each other, and
The high voltage transformer is arranged concentrically with the X-ray tube with an insulator interposed on the outer periphery of the wire heating transformer, and has a hole at a position corresponding to the X-ray emission window of the X-ray tube. an inner cylindrical laminated core formed with an inner cylindrical laminated core, and an inner cylindrical laminated core arranged concentrically with the X-ray tube at a predetermined interval in the radial direction, and corresponding to the X-ray emission window of the X-ray tube. an outer cylindrical laminated core in which holes are formed at positions where the inner and outer cylindrical cores A primary winding and a secondary winding are wound in the circumferential direction with an insulator interposed between the laminated cores, and are insulated from each other.
The present invention relates to a sealed portable X-ray generator characterized in that it is configured as an external iron type transformer, which is different from the above-mentioned one, and has a second winding.

Further, the second invention includes a cylindrical X-ray tube, a high voltage transformer for the X-ray tube, and a wire heating means, and an insulating oil is sealed inside the sealed cylindrical storage box. In the sealed portable X-ray generator, the X-ray tube is disposed in the center of the cylindrical storage box so that their axes coincide with each other, and an insulator is interposed around the outer periphery of the X-ray tube. An inner cylindrical laminated core with a hole formed at a position corresponding to the X-ray emission window of the X-ray tube is disposed concentrically with the X-ray tube, and the inner cylindrical laminated core is radially aligned with the inner cylindrical laminated core. An outer cylindrical laminated iron core with a hole formed at a position corresponding to the X-ray emission window of the X-ray tube is disposed concentrically with the X-ray tube at a predetermined interval, and these inner and outer cylindrical Each end of the laminated core is joined by a pair of annular laminated cores to form a magnetic path, and an insulator is interposed between the inner and outer cylindrical laminated cores to insulate them in the circumferential direction and from each other. The high voltage transformer is constructed as an external iron type transformer by winding a low voltage winding as the primary side and a high voltage winding and an X-ray tube wire heating winding as the secondary side. This invention relates to a sealed portable X-ray generator characterized in that the wire heating means of the X-ray tube is also used as an external iron transformer.

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is an external view of an X-ray device for medical rounds in which the sealed portable X-ray generator of the present invention is mounted on a mobile cart.It has a high output of 100 KVp, for example, and is used for general radiography including dentistry and a fluoroscopy table. It can be seen through. 1 is a moving platform type, 2 is a device main body, 3 is an X
A radiation controller, 4 is a flexible arm, and 5 is a sealed portable X-ray generator according to the present invention. FIG. 2 is a partial cross-sectional view of the front of the X-ray generator of No. 5, and FIG. 3 is a side external view thereof. In FIGS. 2 and 3, 4' is a part of the support arm at the tip of the flexible arm 4 in FIG.
is a cylindrical housing box for an X-ray generator, and has sufficient mechanical strength and structure to support each of the devices described below together with the side plate 6'. 7 is the X-ray irradiation port ring,
8 is a tube, 9 is its anode terminal, 10 is an X-ray emission window of the tube, and 11 is an oil filler port 12 of the cylindrical storage box 6.
The conical lid for sealing is made of a material with higher X-ray transmittance than the cylindrical storage box 6. 13 is a filter, 1
4 is an X-ray mask. Reference numeral 15 denotes an inner plate of the housing box, which is made of an elastic metal material and is joined to both sides of the cylindrical housing box 6 to seal insulating oil 16 that serves both as insulation and cooling for the tube and transformer, and to prevent expansion due to temperature changes.・Has the function of absorbing shrinkage. Reference numeral 17 is a cylindrical insulating substrate that serves as the outer case of the heating transformer described below as well as the core of the main transformer, and is made of a material with excellent mechanical strength and electrical dielectric strength, such as epoxy resin and Delrin. .
Next, the structure of the tube heating transformer 20, which is one of the features of the present invention and is formed concentrically around the outer periphery of the tube 8, will be explained with reference to FIG. FIG. 4 is a perspective view showing the tube 8 of FIG. 2 with the X-ray emission window 10 side facing upward for convenience of explanation.
The tube 8 is, for example, a small tube with an outer diameter of about 50 mm and a length of about 150 mm for fixed anode type 1.5 mm focal diagnosis. Approximately 30 mm corresponding to the center 10C of this X-ray emission window 10
Holes 21 of the same diameter are drilled in each of the parts described below. Reference numeral 22 denotes an insulating cylinder made of synthetic resin material such as epoxy resin, which insulates the tube 8 and the heating transformer core and mechanically engages with the left and right holding plates 23 and 24, and is connected to the heating transformer. This is the core of the configuration. That is, the left end flange 22A is the left retaining plate 23.
and the male threaded part 22B on the right end is the tightening ring 2.
By screwing together with 5, the left and right holding plates 23, 2
The transformer core parts 26, 27, and 28 are tightened and fixed between the 4 parts. The left and right holding plates 23 and 24 are made of an insulating material such as phenolic resin, and two screws are attached to the periphery of the plates.
A polycarbonate resin screw 29 is screwed into the insulating cylinder 22 at an angle of 90°, and the bulb 8 is fixed thereto by pressure contact through a through hole (not shown) of the insulating cylinder 22.
A through hole 30 is provided in the lower convex portion 25A (there are two locations) of the tightening ring 25, and a polycarbonate resin screw 31 inserted into the hole and screwed into the cylindrical insulating substrate 17 is used to secure the tube. The encased heating transformer 20 is fixed. For example, the iron core part
Made of laminated 0.35mm thick grain-oriented silicon steel plates, 26 and 2
8 is a cylindrical core formed concentrically with the tubular core 8, and 27 is a ring-shaped core that forms a magnetic path at both ends of the cylindrical cores 26 and 28. It is a laminate product with a thickness of mm.
This configuration makes it a special external iron type transformer. 32 is the primary winding, which normally applies 100V AC (some 200V), and 33 is the secondary winding, which is generally rated at 2 to 5 V AC and 2 to 5 A to heat the tube wire. Since the high voltage of the tube is applied to this, the insulator between this and the insulating push 34 and the primary winding 32 is made of a synthetic resin material with high dielectric strength. Reference numerals 35 and 36 designate the molded materials. First, the molded material 35 is fitted onto the cylindrical core 26, the primary winding 32 and the secondary winding 33 are wound, and then the molded material 36 is used to wrap the molded material 35. However, the method is not necessarily limited to the above materials and methods, and methods such as casting polyester resin or epoxy resin can also be applied. The above is an explanation of the configuration of the tube-encased heating transformer 20.Next, the structure of the main transformer 50, which is formed concentrically on the outer periphery of the heating transformer 20 with the cylindrical insulating substrate 17 interposed therebetween, will be explained. This will be explained using figures. 5
Reference numerals 1 and 52 denote cylindrical cores similar to the cylindrical cores 26 and 28 described above, with holes 53 and 54 of approximately 35 mm corresponding to the X-ray emission ports, and the materials are similar to the cylindrical cores 26 and 28. It's the same. 55 is a ring-shaped core similar to the ring-shaped core 27 described above, and serves as a magnetic path for the cylindrical cores 51 and 52. 5
Reference numeral 6 denotes a low-voltage winding wire wound over the entire length of the cylindrical core 51 through an insulating cylinder 57 laminated with pressboard or kraft paper;
This is an AC100V (or 200V) lead wire. 59
are high voltage windings (100KV in this example), one each on the left and right, and are connected to the low voltage windings through a main insulation part 60, which is made by laminating insulating paper such as kraft paper to a considerable thickness depending on the required dielectric strength. rolled into shape. Reference numeral 61 indicates an end of a so-called paper-filled insulation structure that insulates each layer of the high-voltage winding 59, and 62 indicates a high-voltage winding protective cover made of a synthetic resin molded product such as Delrin polycarbonate. Insulating paper 6
Insulating oil 16 is made to flow between the two. 63 is a high voltage lead wire drawer insulating tube, and lead wire 6
Reference numeral 4 is for connection to the tubular anode 9, 65 is an insulating tube from which high-voltage lead wires are drawn, and lead wire 66 is for connection to the cathode (not shown) of the tube. 6
One each of the 3 and 65 insulating cylinders are provided, for example, at symmetrical positions. The cylindrical main transformer 50 configured in this manner has the ring-shaped insulating plates 67 and 68 screwed onto the cylindrical insulating substrate from both sides and tightened, and the oil passage 69 between the outer core 52 and the inner wall of the housing box 6. The storage box 6 is supported and fixed by an appropriately shaped spacer (not shown) through which oil flows. The above is the configuration of the special external iron type main transformer, which is one of the features of the present invention.

As can be seen from the configuration of the X-ray generator described above, the conventional one had a lead plate in place other than the tubular X-ray emission port to block the effective external X-rays, whereas the four-layer iron core Since it is encased in a tubular shape, it completely blocks outside X-rays and therefore does not use lead plates. This is a major feature of weight reduction. Also the second
As shown in the figure, the tube, heating transformer, and main transformer are in close contact with each other using only their required insulation layers, and the whole unit is integrated, eliminating unnecessary space and reducing the volume of the storage box compared to the conventional one. The size is well below 2/3 compared to that of the same rating.

The above explanation is that the heating transformer has its own iron core, is used as a functionally independent transformer in conjunction with the main transformer, heats the filaments of the tube prior to X-ray radiation, and after stabilizing the tube voltage. Regarding the standard so-called pre-ignition type X-ray generator, which applies X-rays and emits X-rays for the required time using a timer, etc. Depending on the application, a simultaneous ignition system in which the tube voltage is applied and X-ray emission is started is also used. X for photography or fluoroscopy that does not require precision in exposure time
Regarding the X-ray generator used in the X-ray device, the heating transformer 20 shown in FIG. It is to be sprinkled on top of the tree. The other configurations are almost the same as those in FIG. 2, and illustrations and explanations are omitted. In this case, it goes without saying that the X-ray generator can be further downsized.

The above is an explanation of the standard type (pre-ignition type) and simplified type (simultaneous ignition type) of the sealed portable X-ray generator according to the embodiment of this invention, but this invention is limited to the illustrations and their dimensions, ratings, and materials. Needless to say, this is not something that can be done. 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.

Since the present invention is constructed as described above, the bulb of a sealed portable X-ray generator, which is required to be small and lightweight, is enclosed in the original outer iron core of the heating transformer, and the heating transformer is By constructing the main transformer concentrically with an iron core of the same structure around the outer periphery of the transformer, a lead cover for the tube is not required, and compared to conventional transformers, the core material can be used more effectively, thus improving efficiency. The X-ray generator as a whole uses fewer parts, reducing its weight and price.
It has a simple cylindrical shape and is significantly smaller, making it easier to assemble and lighter.This makes it possible to provide an X-ray generator for an X-ray device that is easy to operate by simplifying the holding mechanism such as the flexible arm and rotating arm. It is something.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a cart-equipped X-ray device for medical rounds using a sealed portable X-ray generator according to the present invention;
Fig. 2 is a front view including a partial cross section showing the structure of the sealed portable X-ray generator, Fig. 3 is a right side external view of the above, and Fig. 4 is the structure of the tubular encased heating transformer of the present invention. It is a perspective view for explanation. 5...Sealed portable X-ray generator, 8...X-ray tube, 10...X-ray emission window, 16...Sealed insulating oil,
20...Outer steel tube envelope heating transformer, 26,2
8...The above cylindrical laminated core, 27...The above annular laminated core, 32...The above primary winding (AC100V
or 200V), 33...the above secondary winding (tube wire heating winding), 50...external iron type high voltage transformer, 5
1, 52, 55...The above outer iron core, 56...
The above primary winding (AC100V or 200V), 59...
...The above secondary winding (high voltage, e.g. 100KV).

Claims (1)

[Claims] 1. A cylindrical X inside a sealed cylindrical storage box.
In a sealed portable X-ray generator that accommodates a ray tube, a wire heating transformer and a high voltage transformer of the X-ray tube, and is filled with insulating oil, the X-ray tube is housed in the cylindrical shape. The wire heating transformers are arranged in the center of the box so that their axes coincide with each other, and
an inner cylindrical laminated layer arranged concentrically with the X-ray tube with an insulator interposed around the outer periphery of the X-ray tube, and having a hole formed at a position corresponding to the X-ray emission window of the X-ray tube; an iron core, which is arranged concentrically with the X-ray tube through a predetermined interval in the radial direction of the inner cylindrical laminated iron core, and has a hole formed at a position corresponding to the X-ray emission window of the X-ray tube; An outer cylindrical laminated core, a pair of annular laminated cores whose respective ends are joined together to form a magnetic path, and an insulator between the inner and outer cylindrical laminated cores. The high-voltage transformer is configured as an external iron transformer consisting of a primary winding and a secondary winding that are wound in the circumferential direction and insulated from each other. an inner cylindrical laminated core arranged concentrically with the X-ray tube on the outer periphery of the transformer with an insulator interposed therebetween, and having a hole formed at a position corresponding to the X-ray emission window of the X-ray tube; An outer cylindrical laminated core is arranged concentrically with the X-ray tube at a predetermined interval in the radial direction from the inner cylindrical laminated core, and has a hole formed at a position corresponding to the X-ray emission window of the X-ray tube. A laminated core, a pair of annular laminated cores whose respective ends of the inner and outer cylindrical laminated cores are joined together to form a magnetic path, and an insulator interposed between the inner and outer cylindrical laminated cores, respectively. A sealed portable X-ray device, characterized in that it is configured as an outside iron type transformer different from the above, comprising a primary winding and a secondary winding that are wound in the circumferential direction and are insulated from each other. generator. 2 A cylindrical Y inside the sealed cylindrical storage box.
In a sealed portable X-ray generator that houses a ray tube, a high voltage transformer and a wire heating means for the X-ray tube, and is filled with insulating oil,
A ray tube is arranged in the center of the cylindrical storage box with their axes aligned with each other, and an insulator is interposed around the outer periphery of the X-ray tube so that an X-ray tube can be placed concentrically with the X-ray tube. An inner cylindrical laminated core with a hole formed therein is disposed at a position corresponding to the X-ray emission window of the ray tube, and the inner cylindrical laminated core is concentric with the X-ray tube through a predetermined interval in the radial direction. Specifically, an outer cylindrical laminated core with a hole formed therein is arranged at a position corresponding to the X-ray emission window of the X-ray tube, and each end of these inner and outer cylindrical laminated cores is connected to a pair of annular laminated cores. A magnetic path is formed by joining each of the cores, and a low-voltage winding is connected as a primary side in the circumferential direction with an insulator interposed between the inner and outer cylindrical laminated cores and insulated from each other.
A high-voltage winding and a winding for heating the X-ray tube wire are wound on the next side, respectively, so that the high-voltage transformer is configured as an external iron type transformer, and the wire heating means for the X-ray tube is This sealed portable X-ray generator is characterized by being made to function as an external iron transformer.