JP2020113447A - X-ray tube air bubble removing device - Google Patents

Abstract

To provide an X-ray tube air bubble removing device capable of removing bubbles from a space in which cooling liquid exists of X-ray tube device.SOLUTION: An X-ray tube air bubble removing device comprises: a first tube part; a second tube part; a third tube part that forms a circulation path together with the first tube part and the second tube part; a fourth tube part; a fifth tube part having one end connected to the first tube part; a pump that is connected to the first tube part and the second tube part, takes in cooling liquid from the first tube part, and discharges the cooling liquid to the second tube part; an air bubble division unit that is connected to the second tube part to the fourth tube part, takes in the cooling liquid from the second tube part, and divides the cooling liquid into cooling liquid having a low air bubble mixing ratio for the third tube part and cooling liquid having a high air bubble mixing ratio for the fourth tube part; and an air bubble trap unit having a container that has an intake port connected to the fourth tube part and an exhaust port connected to the other end of the fifth tube part, takes in the cooling liquid having the high air bubble mixing ratio from the fourth tube part, performs deaeration from the cooling liquid, and sends the cooling liquid having the low air bubble mixing ratio to the fifth tube part.SELECTED DRAWING: Figure 5

Description

Embodiments of the present invention relate to a bubble removing device for an X-ray tube.

Generally, a water-cooled X-ray tube device accommodates an X-ray tube in an X-ray tube container, and a cooling liquid such as water is provided in a cooling pipeline between the X-ray tube container and the cooler for the X-ray tube. The X-ray tube is cooled by being circulated. In such an X-ray tube device, when bubbles are mixed in the cooling liquid in the cooling pipe, the X-ray absorption rate of the cooling liquid and that of the bubbles are different, and thus the intensity of the former X-rays is different from that of the latter X-rays. Therefore, a uniform X-ray flux will not be obtained, and defects such as electric discharge due to bubbles will occur. Therefore, when air bubbles are mixed in the cooling liquid in the cooling pipeline, it is necessary to remove the X-ray tube and the X-ray tube cooler from the X-ray tube device and refill the cooling pipeline with the cooling liquid. ..

JP, 2000-262509, A JP, 2008-66248, A

An object of the present embodiment is to provide a bubble removing device for an X-ray tube, which can remove bubbles from the space where the cooling liquid of the X-ray tube device exists.

According to one embodiment,
A first pipe part, a second pipe part, a third pipe part that forms a part of a circulation path together with the first pipe part and the second pipe part, a fourth pipe part, and the first pipe part. A pump that is connected to a fifth pipe part having one end connected to the first pipe part and the second pipe part, takes in a cooling liquid from the first pipe part, and discharges the cooling liquid to the second pipe part. And the second pipe part to the fourth pipe part, respectively, the cooling liquid is taken in from the second pipe part, and the cooling liquid having a low bubble inclusion ratio among the cooling liquid is supplied to the third pipe part. A bubble separation unit for separating the cooling liquid of the cooling liquid having a high bubble mixing ratio into the fourth pipe portion, an intake port connected to the fourth pipe portion, and the other of the fifth pipe portion. An outlet connected to an end of the fifth pipe, the cooling liquid having a high bubble inclusion ratio is taken in from the fourth pipe portion, degassed from the cooling liquid, and the cooling liquid having a low bubble inclusion ratio is transferred to the fifth portion. An air bubble removing device for an X-ray tube, which comprises a bubble trap unit having a container for sending to a tube portion.

FIG. 1 is a perspective view showing the outer appearance of a gantry of an X-ray CT apparatus according to an embodiment. FIG. 2 is a cross-sectional view showing the X-ray CT apparatus taken along the line II-II in FIG. FIG. 3 is a front view showing the rotary mount shown in FIG. 2, and the X-ray tube device, the X-ray tube cooler, and the X-ray detection device mounted on the rotary mount. FIG. 4 is a configuration diagram showing the X-ray tube device and the X-ray tube cooler. FIG. 5 is a configuration diagram showing the X-ray tube device and the bubble removing device for the X-ray tube. FIG. 6 is a sectional view showing a bubble trap unit of a modified example of the above embodiment.

Hereinafter, the present embodiment will be described with reference to the drawings. It should be noted that the disclosure is merely an example, and a person having ordinary skill in the art can easily think of appropriate modifications while keeping the gist of the invention, and are naturally included in the scope of the invention. Further, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example, and It does not limit the interpretation. Further, in the present specification and the drawings, constituent elements that exhibit the same or similar functions as those described above with respect to the already-existing drawings are designated by the same reference numerals, and redundant detailed description may be appropriately omitted. ..

In the present embodiment, a bubble removing device for an X-ray computed tomography apparatus will be described as an example of the bubble removing device for an X-ray tube. First, the X-ray computed tomography apparatus will be described in detail. The X-ray computed tomography apparatus is an X-ray CT (computerized tomography) apparatus. FIG. 1 is a perspective view showing the outer appearance of a gantry of an X-ray CT apparatus according to an embodiment. FIG. 2 is a cross-sectional view showing the X-ray CT apparatus taken along the line II-II in FIG. FIG. 3 is a front view showing the rotary mount shown in FIG. 2, the X-ray tube device, the X-ray tube cooler, and the X-ray detector mounted on the rotary mount.

As shown in FIGS. 1 to 3, the X-ray CT apparatus 1 includes a housing 2, a base 4, a fixed mount 5, a rotary mount 6, a bearing member 8, an X-ray tube device 10, an X-ray tube cooler 20, And an X-ray detector 40.

The housing 2 houses many of the above members. The housing 2 decorates the appearance of the X-ray CT apparatus 1. The housing 2 includes an exhaust port 2a, an intake port 2b, and an introduction port 2c.
The exhaust port 2a is formed in the upper part of the housing 2. The exhaust port 2a is closed by a mesh-shaped cover 3 having excellent air permeability. Although not shown, the X-ray CT apparatus 1 further includes a fan unit provided inside the housing 2 and facing the cover 3. Thereby, the air in the housing 2 can be discharged to the outside of the housing 2 through the exhaust port 2a.

The intake port 2b is formed in the lower portion of the housing 2. Here, the intake port 2b is formed in the gap between the housing 2 and the base portion 4. Air outside the housing 2 can be taken into the inside of the housing 2 through the intake port 2b.
From the above, since the air inside the housing 2 can be replaced, the temperature rise of the air inside the housing 2 can be suppressed.
The introduction port 2c is for introducing a subject. Although not shown, the X-ray CT apparatus 1 also includes a bed on which the subject is placed.

The fixed base 5 is fixed to the base portion 4. A bearing (rolling bearing, ball/roll bearing) member 8 functioning as a bearing mechanism is provided between the fixed mount 5 and the rotary mount 6.

The rotary base 6 is rotatably supported by the fixed base 5 via a bearing member 8. The rotary mount 6 is called a gantry, and is rotatable about a rotation axis (center of the gantry) a1 of the rotary mount 6. In order to rotate the rotary base 6 at high speed, the X-ray CT apparatus employs, for example, a direct drive motor. The rotary base 6 has a ring-shaped frame portion 7 located at the outermost periphery.

The X-ray tube device 10, the X-ray tube cooler 20, and the X-ray detector 40 are attached to the rotary mount 6. The X-ray tube device 10 and the X-ray tube cooler 20 are attached to the inner wall of the frame portion 7. Although not shown, a high voltage generating power source or the like may be attached to the inner wall of the frame portion 7. The X-ray tube device 10 and the X-ray tube cooler 20 are relatively compact, have a large mass, and have a high pressure on the installation surface, and thus are firmly fixed to the frame portion 7. As a result, even when the rotary gantry 6 rotates at a high speed and, as a result, a large centrifugal force is applied to the X-ray tube device 10 and the X-ray tube cooler 20, they can be firmly fixed to the frame portion 7. It is a thing.

The X-ray tube device 10 functions as an X-ray generator and emits X-rays. The X-ray detector 40 faces the X-ray tube device 10 (X-ray tube) across the rotation axis a1. The X-ray detector 40 has a plurality of X-ray detection elements arranged in, for example, an arc shape. The X-ray CT apparatus 1 may include a plurality of X-ray detectors 40 and may be arranged. The X-ray detector 40 detects X-rays radiated from the X-ray tube device 10 and transmitted through the subject, and converts the detected X-rays into electric signals.

Although not shown, the X-ray CT apparatus 1 may further include a data acquisition device that is attached to the rotary mount 6 and that amplifies the electrical signal output from the X-ray detector 40 and AD-converts it. Although not shown, the fixed mount 5 may be provided with a device for supplying electric power or control signals to the X-ray tube device 10 and the X-ray tube cooler 20. The above device can supply power or control signals to the X-ray tube device 10 and the X-ray tube cooler 20 that are attached to the rotary mount 6 via slip rings.

When the X-ray CT apparatus 1 enters the operating state, the rotary base 6 rotates about the rotation axis a1. At this time, the X-ray tube device 10, the X-ray tube cooler 20, the X-ray detector 40, and the like integrally rotate around the subject. At the same time, X-rays are emitted from the X-ray tube device 10.

The X-rays pass through the subject and enter the X-ray detector 40, and the X-ray detector 40 detects the intensity of the X-rays. The detection signal detected by the X-ray detector 40 is amplified by, for example, the data acquisition device, converted into a digital detection signal by A/D conversion, and supplied to a computer (not shown).

The computer calculates the X-ray absorption rate in the region of interest of the subject based on the digital detection signal, and constructs image data for generating a tomographic image of the subject from the calculation result. The image data is sent to a display device (not shown) or the like and displayed as a tomographic image on the screen.

As described above, in the X-ray CT apparatus 1, the X-ray tube apparatus 10 and the X-ray detector 40 rotate while sandwiching the subject, and the so-called projection or weakness of the X-ray transmitted through every point in the examination cross section of the subject. Data is acquired from various angles, for example a range of 360°. Then, based on this projection data, a tomographic image is generated by a pre-programmed data reconstruction program.

FIG. 4 is a configuration diagram showing the X-ray tube device 10 and the X-ray tube cooler 20.
As shown in FIGS. 3 and 4, the X-ray tube device 10 includes a housing 12, an X-ray tube 13 housed in the housing 12, and a telescopic mechanism 14. The housing 12 (X-ray tube device 10) is independently and directly or indirectly attached to and fixed to the rotary mount 6. Here, the housing 12 is directly attached to the inner wall of the frame portion 7. Here, the X-ray CT apparatus 1 has a cooling liquid 9. At least a part of the heat generated by the X-ray tube 13 is transferred to the cooling liquid 9.

The X-ray tube device 10 has a conduit 11a and a conduit 11b. One end of the conduit 11a is airtightly attached to the cooling liquid intake 12i of the housing 12, and the other end is airtightly attached to the socket 72. One end of the conduit 11b is airtightly attached to the coolant discharge port 12o of the housing 12, and the other end is airtightly attached to the socket 82. The conduits 11a and 11b form a part of the circulation path 30 in which the cooling liquid 9 circulates.

For example, in the X-ray tube device 10, the cooling liquid 9 is filled in at least the space between the housing 12 and the X-ray tube 13. The housing 12 forms a part of the circulation path 30 together with the conduit 11a and the conduit 11b. The conduits 11 a and 11 b are not connected to the X-ray tube 13. However, since the X-ray tube 13 is immersed in the cooling liquid 9, the cooling liquid 9 can cool the X-ray tube 13 such as the heat transfer surface on the outer surface of the X-ray tube 13.

Further, the conduit 11a and the X-ray tube 13 may be directly or indirectly connected via a connecting member, or the conduit 11b and the X-ray tube 13 may be directly or indirectly connected via a connecting member. Good. The housing 12 and the inside of the X-ray tube 13 form a part of the circulation path 30 together with the conduits 11a and 11b. As a result, the cooling liquid 9 circulates through the heat transfer surface inside the X-ray tube 13, whereby the X-ray tube 13, especially the anode target can be cooled.

In addition, when the conduits 11 a and 11 b are both connected to the X-ray tube 13, another cooling liquid is contained in the space between the housing 12 and the X-ray tube 13. The other cooling liquid is separated so as not to mix with the cooling liquid 9, and does not circulate in the circulation path 30. In this case, the other cooling liquid may be a cooling liquid of a type different from the cooling liquid 9. The inside of the X-ray tube 13 forms a part of the circulation path 30 together with the conduit 11a and the conduit 11b. As a result, the cooling liquid 9 circulates through the heat transfer surface inside the X-ray tube 13, whereby the X-ray tube 13, especially the anode target can be cooled. Then, the other cooling liquid can cool the X-ray tube 13 from the outside, such as the heat transfer surface on the outer surface of the X-ray tube 13.

The X-ray tube cooler 20 includes a conduit 21 a, a conduit 21 b, a conduit 21 c, a conduit 21 d, a circulation pump 22, a heat exchanger 23, a housing 26, and an expansion/contraction mechanism 60. The circulation pump 22, the heat exchanger 23, and the expansion/contraction mechanism 60 are provided in the housing 26. One end of the conduit 21a is hermetically attached to the plug 81. One end of the conduit 21c is hermetically attached to the plug 71. One end of the conduit 21d is airtightly attached to the conduit 21a. The conduit 21 a, the conduit 21 b, the conduit 21 c and the conduit 21 d form a part of the circulation path 30.

The circulation pump 22 is attached to the circulation path 30. Here, the circulation pump 22 is airtightly attached between the conduit 21a and the conduit 21b. The circulation pump 22 takes in the cooling liquid 9 from the conduit 21a and discharges the cooling liquid 9 into the conduit 21b. The circulation pump 22 can circulate the cooling liquid 9 in the circulation path 30.

The heat exchanger 23 has a radiator 24 and a fan 25. The fan 25 is configured to ventilate the radiator 24. The radiator 24 is configured to release the heat of the cooling liquid entering from the conduit 21b. The heat exchanger 23 can cool the cooling liquid 9.
Therefore, the X-ray tube cooler 20 can cool the cooling liquid 9 and circulate the cooling liquid 9 in the circulation path 30.

The expansion/contraction mechanism 60 is attached to the circulation path 30. The expansion/contraction mechanism 60 has a case 61 having through holes 61a and 61b, and an elastic diaphragm 62. The through hole 61a is airtightly connected to the conduit 21d. The through hole 61b is a vent hole. The elastic diaphragm 62 is formed of, for example, a bellows using rubber. The elastic diaphragm 62 divides the inside of the case 61 into a first space 63 connected to the through hole 61a and a second space 64 connected to the through hole 61b.

The second space 64 is open to the atmosphere so that the through hole 61b allows air to flow in and out. The elastic diaphragm 62 is liquid-tightly attached to the case 61. The elastic diaphragm 62 is stretchable. The elastic diaphragm 62 can absorb the volume change (volume expansion and contraction) due to the temperature change of the cooling liquid 9. The elastic diaphragm 62 is preferably formed of a material impermeable to gas.

The plug 71 and the socket 72 form a coupler 70 as a detachable connecting member, and the plug 81 and the socket 82 form a coupler 80 as a detachable connecting member. The couplers 70 and 80 can be switched between a connected state (fixed state) in which the plug and the socket are connected and a separated state in which the plug and the socket are separated. In the coupled state, the couplers 70 and 80 are hermetically and liquid-tightly coupled. The couplers 70 and 80 are couplers with a shutoff valve. In the separated state of the couplers 70 and 80, the plugs 71 and 81 and the sockets 72 and 82 can respectively prevent the liquid (cooling liquid 9) from leaking to the outside and prevent air from being mixed into the inside. It has a structure that allows it. By switching the couplers 70 and 80 to separate states, the couplers 70 and 80 can be separated into two systems, and the X-ray tube device 10 and the X-ray tube cooler 20 can be separated.

Next, the bubble removing device for an X-ray tube according to the present embodiment will be described. FIG. 5 is a configuration diagram showing an X-ray tube device and a bubble removing device for an X-ray tube.
As shown in FIG. 5, the bubble removing device 100 for an X-ray tube includes a pump P, a bubble separating unit AD, a bubble trap unit AT, a pipe portion 101, a pipe portion 102, a pipe portion 103, and a pipe portion 104. And a pipe 105, a regulating valve R1, a regulating valve R2, and a regulating valve R3. The pipe parts 101 to 105 function as first to fifth pipe parts, respectively, the regulating valve R1 functions as a first regulating valve, and the regulating valve R3 functions as a second regulating valve. The bubble removing device 100 for an X-ray tube has a cooling liquid 9 and is configured to circulate the cooling liquid 9 with the X-ray tube device 10.

The pipe portion 101 has one end airtightly attached to the plug 106 and the other end airtightly attached to the primary side (intake port) of the pump P. One end of the pipe portion 102 is airtightly attached to the secondary side (exhaust port) of the pump, and the other end is airtightly attached to the primary side AD1 of the bubble separation unit AD. The pipe section 102 includes a regulating valve R1. The adjusting valve R1 can adjust the flow rate of the cooling liquid 9 in the pipe portion 102 and adjust the flow rate of the cooling liquid 9 to be sent to the bubble separation unit AD. The tube 103 has one end airtightly attached to the secondary side AD3 of the bubble separation unit AD and the other end airtightly attached to the plug 107. The pipe portion 103 includes a regulating valve R2. The adjusting valve R2 can adjust the flow rate of the cooling liquid 9 in the tube portion 103 and adjust the flow rate of the cooling liquid 9 sent to the X-ray tube device 10. The pipe parts 101 to 103 form a part of the circulation path 50 through which the cooling liquid 9 circulates together with the conduit 11a, the X-ray tube device 10 and the conduit 11b.

The tube portion 104 has one end airtightly attached to the secondary side AD2 of the bubble separation unit AD and the other end airtightly attached to the primary side AT1 of the bubble trap unit AT. The tube portion 105 has one end airtightly attached to the secondary side AT2 of the bubble trap unit AT and the other end airtightly attached to the tube portion 101. The pipe portion 105 includes a regulating valve R3. The adjusting valve R3 can adjust the flow rate of the cooling liquid 9 in the pipe portion 105 and adjust the flow amount of the cooling liquid 9 sent to the pipe portion 101. The pipe portion 104, the bubble trap unit AT, and the pipe portion 105 form a part of the bypass passage 90.

The pump P is connected to each of the pipe portions 101 and 102, takes in the cooling liquid 9 from the pipe portion 101, and discharges the cooling liquid 9 to the pipe portion 102. The pump P can circulate the cooling liquid 9 in the circulation path 50.

The bubble separation unit AD is connected to each of the pipe parts 102 to 104, takes in the cooling liquid 9 from the pipe part 102, and transfers the cooling liquid 9 having a low bubble inclusion ratio among the cooling liquid 9 to the pipe part 103. Among them, the cooling liquid 9 having a high bubble inclusion rate can be separated into the pipe portion 104.

The bubble trap unit AT includes a waterproof film WF and a container C. The waterproof film WF is, for example, a waterproof film having gas permeability. The container C has an intake port (primary side AT1) connected to the pipe portion 104, a discharge port (secondary side AT2) connected to the pipe portion 105, and an opening OP described below. The container C takes in the cooling liquid 9 having a high bubble inclusion rate from the pipe portion 104, degasses the cooling liquid 9 having a high bubble inclusion ratio, and discharges the deaerated cooling liquid 9 having a low bubble inclusion ratio to the pipe part 105. can do.

The plug 106 and the socket 82 form a coupler 110 as a detachable connecting member, and the plug 107 and the socket 72 form a coupler 120 as a detachable connecting member. By switching the couplers 110 and 120 to separate states, the couplers 110 and 120 can be separated into two systems, and the X-ray tube device 10 and the X-ray tube bubble removing device 100 can be separated.

Here, a method of removing bubbles from the cooling liquid 9 of the X-ray tube device 10 using the bubble removing device 100 for the X-ray tube when the bubbles are mixed in the cooling liquid 9 of the X-ray tube device 10 will be described with reference to FIGS. This will be described with reference to FIG.
The rotary mount 6 of the X-ray CT apparatus 1 shown in FIG. 3 is rotated so that the X-ray tube device 10 is located above the X-ray tube cooler 20. The circulation pump 22 is used to circulate the cooling liquid 9 in the circulation path 30. Thereby, the bubbles existing in the circulation path 30 can be accumulated in the X-ray tube device 10. When circulating the cooling liquid 9, the positional relationship between the X-ray tube device 10 and the bubble removing device 100 for the X-ray tube can be appropriately adjusted. After the bubbles are stored in the X-ray tube device 10, the couplers 70 and 80 shown in FIG. 4 are switched to the separated state, respectively, to separate the X-ray tube device 10 and the X-ray tube cooler 20. After the separation, the X-ray tube device 10 is not moved, and the X-ray tube device 10 and the bubble removing device 100 for the X-ray tube shown in FIG. 5 are connected via the couplers 110 and 120.

The cooling liquid 9 of the X-ray tube device 10 is circulated in the circulation path 50 by the pump P together with the cooling liquid 9 that is already present in the bubble removing device 100 for the X-ray tube. The cooling liquid 9 sent out by the pump P is sent to the bubble separation unit AD. By the bubble separation unit AD, the cooling liquid 9 having a high bubble mixing ratio among the cooling liquids 9 is sent to the bubble trap unit AT, and the cooling liquid 9 having a low bubble mixing ratio among the cooling liquids 9 is sent to the X-ray tube device 10. The liquid is circulated in the circulation path 50. In the container C of the bubble trap unit AT, the cooling liquid 9 having a high bubble mixing rate is discharged from the liquid into the air in the container C. The bubbles released into the air in the container C are released into the atmosphere through the waterproof film WF. On the other hand, the cooling liquid 9 in which bubbles are discharged from the liquid and the bubble mixing ratio is low flows from the secondary side AT2 of the bubble trap unit AT to the primary side of the pump through the bypass passage 90.
By repeating this circulation, the bubbles accumulated in the X-ray tube device 10 can be removed from the circulation path 50, and the bubbles existing in the X-ray tube device 10 are removed. As a result, the X-ray tube bubble removing apparatus 100 can remove bubbles that may be present in each of the X-ray tube apparatus 10 and the conduits 11a and 11b at the site where the X-ray tube apparatus 10 is installed. Further, since the X-ray tube bubble removing apparatus 100 can be attached to the X-ray tube apparatus 10 instead of the X-ray tube cooler 20, it is not necessary to move the X-ray tube apparatus 10 when removing bubbles. As a result, it is possible to save the trouble of attaching and detaching the X-ray tube device 10 to and from the frame portion 7.

FIG. 6 is a sectional view showing a bubble trap unit of a modified example of the above embodiment.
As shown in FIG. 6, the bubble trap unit AT of the modification further includes a vacuum pump AP and a tube portion 108. The container C has an opening OP closed by the waterproof film WF. The pipe portion 108 has one end airtightly attached to the container C and communicates with the opening OP, and the other end airtightly attached to the primary side of the vacuum pump AP. The vacuum pump AP is connected to the container C via the pipe portion 108. The secondary side of the vacuum pump AP has a bubble outlet APE. The vacuum pump AP can take in the bubbles that have permeated the waterproof film WF through the tube portion 108 and discharge the bubbles from the bubble outlet APE.

Even in such a configuration, the same effect as that of the above embodiment can be obtained. In addition, since the bubble trap unit AT includes the vacuum pump AP, the cooling liquid 9 in the container C of the bubble trap unit AT can be further deaerated.

As described above, according to the present embodiment, there is provided a bubble removing device for an X-ray tube, which is capable of removing bubbles from the space where the cooling liquid of the X-ray tube device is present at the site where the X-ray tube device is installed. be able to.

Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment described above can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

100... Bubble removing device for X-ray tube 101, 102, 103, 104, 105... Tube section
P... Pump AD... Bubble separation unit AT... Bubble trap unit CT... Container
WF...Waterproof film AP...Vacuum pump R1, R2, R3...Adjusting valve 9...Coolant.

Claims (5)

A first pipe section,
A second pipe section,
A third pipe part forming a part of a circulation path together with the first pipe part and the second pipe part;
A fourth pipe section,
A fifth pipe part having one end connected to the first pipe part;
A pump that is connected to the first pipe portion and the second pipe portion, takes in the cooling liquid from the first pipe portion, and discharges the cooling liquid to the second pipe portion;
The cooling liquid is connected to each of the second pipe part to the fourth pipe part, takes in the cooling liquid from the second pipe part, and the cooling liquid having a low bubble inclusion rate among the cooling liquid is supplied to the third pipe part, A bubble separation unit that separates the cooling liquid having a high bubble inclusion ratio of the cooling liquid into the fourth pipe portion,
An intake port connected to the fourth pipe part and an exhaust port connected to the other end of the fifth pipe part, and intakes the cooling liquid having a high bubble inclusion rate from the fourth pipe part; A bubble trap unit having a container that degasses the cooling liquid and sends the cooling liquid having a low bubble mixing ratio to the fifth pipe portion;
Bubble removal device for X-ray tube. Further comprising a bubble trap unit having the container and a waterproof film having gas permeability,
The container has an opening,
The waterproof film closes the opening,
The bubble removing device for an X-ray tube according to claim 1. The bubble trap unit further includes a vacuum pump connected to the container and configured to suck in the bubbles that have permeated the waterproof film,
The bubble removing device for an X-ray tube according to claim 2. The second pipe part includes a first adjusting valve for adjusting the flow rate of the cooling liquid sent to the bubble separation unit.
The bubble removing device for an X-ray tube according to any one of claims 1 to 3. The fifth pipe portion includes a second adjustment valve that adjusts the flow rate of the cooling liquid sent to the first pipe portion,
The bubble removing device for an X-ray tube according to any one of claims 1 to 4.

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