JP2002056791A - Method for manufacturing x-ray tube equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fill a storage container of an X-ray tube with adequate amount of an insulating oil by carrying out automation of the oil amount adjustment with high precision measuring of a braking height of the oil level. SOLUTION: The storage container 1 of an X-ray tube, while storing the X-ray tube 41 inside, is enabled to regulate amount of stored insulating oil by a bellows 22 attached to a part. An oil temperature of the insulating oil stored in the storage container 1 of an X-ray tube is measured. Adequate amount of the insulating oil in the storage container 1 of the X-ray tube, corresponding to the oil temperature is judged. The amount of the insulating oil poured into the storage container 1 of the X-ray tube is adjusted by expanding or shrinking of the above bellows 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an X-ray tube apparatus, and more particularly to a method for filling an X-ray tube container (hereinafter referred to as "Haube") with insulating oil.

[0002]

2. Description of the Related Art In a rotating anode X-ray tube, a tube main body and insulating oil are housed in a Haube for cooling the tube main body and insulating the anode and the cathode.

In general, an X-ray tube apparatus has an X-ray tube housed in a Haube. Since the X-ray tube is used at a high voltage, the container is further filled with insulating oil. Conventionally, this insulating oil is introduced into the container as shown in FIG.

That is, an insulating oil introduction trap 54 composed of an exhaust pipe 52 connected to a vacuum pump (not shown) and an insulating oil introduction pipe 53 is connected to an X-ray emission window 56 of the Haube 1 via a packing 55. And airtight.

[0005] Since a high voltage is also applied to the inside of the Howe 1, a small amount of air or the like remaining in the Howe 1 causes a discharge. Therefore, first, the inside of the housing 1 is evacuated by the exhaust pipe 52 connected to the vacuum pump to sufficiently remove the air and moisture inside, and then the insulating oil 7 is introduced into the housing 1 from the insulating oil introducing pipe 53. Then, after filling the inside of the housing 1 with the insulating oil 7, the insulating oil introduction trap 54 is removed as shown in FIG. 5, and the X-ray radiation gate 57 is tightly sealed with a ring nut 58 via a packing 55.

When actually injecting the insulating oil into the Haube,
Since several kinds of components such as a tube stator are incorporated in the Haube, there are several air pockets, and if only oil is injected, air bubbles will remain in the Haube, as shown in FIG. To the insulating oil 7 via the solenoid valve 4
After being injected into the inside, the Howe 1 is swung right and left, and air bubbles are emitted from the air pool.

Next, the X-ray tube Howbe encloses insulating oil in order to apply a high voltage to the internal X-ray tube and to cool the heat generated by the X-ray radiation. Oil thermally expands with increasing temperature. At this time, a rubber bellows is provided in the X-ray tube Howbe so as not to break the Howbe by the pressure of the thermally expanded insulating oil.

[0008]

Therefore, it is necessary to enclose an appropriate amount of oil in the X-ray tube Howebe for each kind and oil temperature.

However, conventionally, since this adjustment has been performed by a human system, it takes time and effort to perform the adjustment, and there is also a problem such as an adjustment error.

As described above, conventionally, when manufacturing an X-ray tube apparatus, there is a problem that it is difficult to fill the X-ray tube Howebe with a truly proper insulating oil in terms of oil amount adjustment. Have.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above problem. It is an object of the present invention to make it possible to fill a truly proper insulating oil.

[0012]

According to a method of manufacturing an X-ray tube apparatus of the present invention, an X-ray tube is accommodated therein and the amount of insulating oil accommodated therein can be adjusted by a bellows attached to a part of the X-ray tube. The oil temperature of the insulating oil contained in the tube container is measured, the appropriate amount of oil contained in the X-ray tube container according to the oil temperature is determined, and the bellows is expanded or contracted to adjust the X temperature.
This is a method for manufacturing an X-ray tube apparatus that adjusts the amount of insulating oil to be injected into the tube holding container to the appropriate amount of holding oil.

In this method of manufacturing an X-ray tube apparatus, oil is injected into a cylinder provided in the front stage of the X-ray tube accommodating container while the bellows is pressurized and expanded, and then the oil level in the cylinder is measured in advance. The bellows is depressurized until it descends to a position appropriate for the temperature, and after stopping the evacuation of the bellows, the amount of oil level descending further is measured. This is a method of manufacturing an X-ray tube apparatus that determines an oil level position in a cylinder at which the evacuation of a bellows in oil amount adjustment is stopped, and performs appropriate oil amount adjustment.

[0014]

According to the method of manufacturing an X-ray tube device of the present invention, an X-ray tube container is measured by measuring the oil temperature of insulating oil, judging an appropriate amount of oil stored in accordance with the oil temperature, and adjusting the expansion or contraction of the bellows. The amount of insulating oil to be injected into the inside is adjusted to the above-mentioned appropriate stored oil amount.

In a state where the bellows is inflated by pressurizing, lubricating is performed so that the oil level reaches the middle of the cylinder. next,
The bellows is evacuated and decompressed while measuring the oil amount so that the oil amount matches the oil temperature. When the oil level reaches the set height, stop evacuation, measure the oil level, and store it in memory. The oil level drops thereafter but stabilizes over time. Here, the oil level is measured again, and the braking capacity of the bellows is calculated from the measured oil level and the oil level at the time when the evacuation is stopped, which is stored in the memory. Next, the amount of oil is adjusted again from the bellows pressurization. At this time, when the oil level is higher than the set height by the calculated braking capacity, the evacuation of the bellows is stopped, so that the oil level in the cylinder becomes exactly the set height when the oil level is stabilized. This realizes automatic adjustment and satisfies oil amount adjustment accuracy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing an X-ray tube apparatus according to the present invention will be described in detail with reference to an embodiment shown in FIGS.

FIG. 1 shows a cross-sectional view and a circuit diagram of an apparatus for automatically adjusting the amount of insulating oil to be filled in an X-ray tube container (hereinafter, this container is referred to as “Haube”) 1. FIG. The operation flowchart is shown. The following operation is controlled by the controller 38.

The apparatus shown in FIG. 1 relates to a method for adjusting the amount of oil by which the bellows 22 of the X-ray tube Howbe 1 is pressurized or evacuated to change the inside volume of the Howbe.
An oil amount adjustment cylinder 23 that once accumulates oil at the previous stage, an oil level displacement sensor 24 that measures the oil level in the cylinder 23,
Solenoid valve 32 for controlling air 34 for pressurizing the bellows 22
Similarly, a simple vacuum generator 33 for evacuating the bellows 22, an output 29 of the oil level displacement sensor 24 and the
A controller that receives the temperature value output 40 of the thermometer 39 inserted in the controller and controls the solenoid valve 32 and the simple vacuum generator 33
38. The braking characteristic of the bellows 22 is calculated by measuring with the displacement sensor 24.

Here, an insulating oil introduction trap 54 is attached to the Howe 1 containing the X-ray tube 41. In this state, after the inside of the housing 1 is evacuated by the vacuum pump 11, oil injection is started.

First, the bellows 22 in the housing 1 is pressurized with the high-pressure air 34 so as to expand to the maximum (step S).
1). Next, the solenoid valve 4 is opened, and the insulating oil 7 is injected (step S2). The oil level rises to a certain height 25 of the oil amount adjusting cylinder 23, and the displacement sensor (float switch) 24
(Y in step S3), the solenoid valve 4 is automatically closed to stop oil injection (step S4). Here, the temperature of the oil is measured by the thermometer 39 (step S5), and an appropriate oil amount (volume) is calculated from the temperature value output 40 and the type of Haube 1 (step S6).

Next, the oil level height 26 when the bellows 22 is changed so that the inside of the housing 1 has this volume is calculated (step S7). Thereafter, the bellows 22 is evacuated to lower the oil level. However, even if the evacuation of the oil level is stopped, the oil level does not stop immediately. X
Varies depending on the type of Haube 1, oil temperature, etc.
The initial value is the expected value.

By evacuating the bellows 22 (step S12), the oil level drops to a position 26, and the displacement sensor 24
Is reached at the position of Y (= A + X) (step S1).
3 Y), stop the evacuation of the bellows 22 (step
S14). Since the oil level is lowered thereafter, it waits for several seconds until it is stabilized (step S15), and then measures the actual oil level C (step S16). That is, when the oil level reaches the appropriate position 26, the bellows 22
The oil level drops until the internal pressure of the pipe connected to and the hydraulic pressure pushing the bellows 22 from the opposite side are balanced. The amount of decrease in the oil level is determined by the displacement sensor 24 provided in the cylinder 23.
Automatically measure by

If the oil level braking height at this time is equal to the previously set value X, the oil level height C becomes equal to the target value A, and the adjustment is completed (Y in step S17). May be A ≠ C because of the expected value (N in step S17). In this case, the actual oil level braking height X is calculated (step S19), and the oil amount is adjusted again from the pressurization of the bellows 22 (from step S20 to step S10). Since the second X is an actually measured value, it should be C = A, but if different, it is repeated several times (N in step S18), and if it still does not match, an error occurs (Y in step S18). Here, the allowable number N = 5.

According to the above method, the oil amount can be adjusted with high accuracy while being automatic.

[0025]

According to the present invention, the amount of insulating oil injected into the X-ray tube container is adjusted by expanding or contracting the bellows.
It can be adjusted properly according to the oil temperature. Further, in the oil amount adjusting method in which the bellows of the X-ray tube accommodating container is pressurized or depressurized to change the volume in the accommodating container, highly accurate oil amount adjustment according to the oil temperature can be automatically performed. An appropriate amount of insulating oil can be filled in the wire tube container. In addition, it is possible to improve the reliability of the product, eliminate the need for skilled work, and reduce costs by saving labor.

[Brief description of the drawings]

FIG. 1 is a sectional view and a circuit diagram showing an embodiment of an apparatus according to a method for manufacturing an X-ray tube apparatus of the present invention.

FIG. 2 is a flowchart showing an oil amount adjusting method in the embodiment of FIG.

FIG. 3 is an explanatory diagram showing a conventional method of filling an X-ray tube housing container with oil.

FIG. 4 is a front view in which an insulating oil introduction trap of the X-ray tube housing is broken.

FIG. 5 is an enlarged sectional view of an oil-filled sealing portion of the X-ray tube accommodating container.

[Explanation of symbols]

 1 X-ray tube container 7 Insulating oil 22 Bellows 23 Oil amount adjusting cylinder 41 X-ray tube

Claims (2)

[Claims] An oil temperature of an insulating oil accommodated in an X-ray tube accommodating container in which an X-ray tube is accommodated and an amount of the insulating oil accommodated is adjustable by a bellows attached to a part thereof is measured. Determining the appropriate amount of oil contained in the X-ray tube container according to the oil temperature, adjusting the amount of insulating oil to be injected into the X-ray tube container by adjusting the expansion or contraction of the bellows. A method for manufacturing an X-ray tube device, comprising: 2. In a state where the bellows is inflated by pressurizing,
Inject oil into the cylinder provided in the front stage of the X-ray tube container, depressurize the bellows until the oil level in the cylinder drops to a position corresponding to the oil temperature measured in advance, and further stop evacuation of the bellows. The amount of lowering of the oil level is measured, and the actual oil level is used to determine the position of the oil level in the cylinder that stops the evacuation of the bellows in the oil amount adjustment that is performed again by the bellows pressurization. A method for manufacturing the X-ray tube device according to claim 1.