JPH083902Y2 - Cooling channel structure in thin section - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to the structure of a cooling channel in a thin portion,
The required flow passage cross-sectional area is secured and the opening end of the cooling flow passage opened by boring is reliably sealed.

[Conventional technology]

2 (a) to 2 (c) show a structural example in which a cooling channel is provided in the thin portion. This is a combination of a cylindrical inner member 10 and an outer cylindrical member 11 joined together. A supply port 12 and a discharge port 14 are provided on the flange portion 10a of the inner cylinder member 10.
(Both are circular holes), and further communicating with this, bore 1 from the lower end of the inner member 10 by drilling with a drill.
6,17 have been opened. Plugs 18 and 19 are fitted into the opening ends 16a and 17a of the holes 16 and 17 and sealed by brazing or the like.

The outer member 11 is fitted on the outer periphery of the inner member 10, and the upper and lower parts are joined by brazing to form a cooling flow path 20 between the inner member 10 and the outer member 11. The cooling flow path 20 is formed around the entire circumference of the cylinder, and a partition plate 22 is provided on a part thereof. The cooling flow path 20 communicates with the holes 16 and 17.

Therefore, when cooling water is supplied from the supply port 12, the holes 16
Through which the inner member 10 and the outer member 11 are cooled, and the inner member 10 and the outer member 11 are cooled, and are discharged from the discharge port 14 through the hole 17.

[Problems to be solved by the device]

In the case shown in FIG. 2, when the thickness d of the portions where the holes 16 and 17 are to be formed is small, the hole 16 cannot be formed as a round hole, and therefore, conventionally, it is shown in FIG. 2 (c). As a hole
The shapes of 16, 17 were made flat to secure the required flow passage cross-sectional area.

Drilling such flat holes 16 and 17 can be accomplished by boring several times with a drill and connecting the holes, but it was difficult to form an accurate shape by such a method. . Also, the plugs 18 and 19 for sealing the open end portions 16a and 17a must be formed flat as shown by the hatched view in FIG. 2 (d), which is also formed in an accurate shape. Was difficult.

For this reason, it is necessary to perform brazing with a material that is particularly simple and difficult to weld in a high vacuum, but conventionally, the holes 16 and 17 and the plugs 18 and 19 are brazed. For this reason, it is difficult to perform face-to-face contact with high accuracy, and even if brazing is performed, there is a possibility that a gap may occur and the cooling water may leak out.

This device solves the drawbacks of the conventional technique,
In addition to ensuring the necessary flow passage cross-sectional area in the thin part,
An object of the present invention is to provide a cooling channel structure in a thin portion in which the opening end of the cooling channel opened by boring is surely sealed.

[Means for solving the problem]

According to the present invention, a cooling flow path is provided between a cooling unit formed in a device or a structure and a supply / discharge port for a cooling fluid, and one end is connected to the cooling unit and the other end is connected to a supply / discharge port. In the portion that passes through the thin portion of the structure or the structure, the tip is communicated with either the cooling unit or the supply / discharge port by boring from the outside of the end of the thin portion of the device or the structure, and the side portion is the cooling unit. Alternatively, by forming a plurality of round holes communicating with either of the supply and discharge ports, a flow passage cross-sectional area is ensured, and a circular plug is fitted into the opening outside the end of these round holes to seal. The cooling channel is configured to connect the cooling unit and the supply / discharge port.

[Action]

According to this invention, the required flow passage cross-sectional area can be obtained by forming a plurality of round holes in the thin portion. Moreover, since the opening end of the round hole is sealed by fitting the round hole and the round plug, highly accurate face-to-face fitting or screwing can be performed, and the leakage of the cooling fluid can be prevented.

〔Example〕

An embodiment in which the present invention is applied to a cooling channel in a high frequency accelerating cavity of a synchrotron will be described below.

FIG. 3 shows a schematic structure of a high frequency acceleration cavity of a synchrotron. The high-frequency acceleration cavity 30 is provided in the middle of a vacuum container (storage ring) 32 around which an electron beam orbits. The high-frequency acceleration cavity body 34 is composed of a cylindrical container whose center axis is the orbital position of the electron beam.
In the high-frequency acceleration cavity body 34, cylindrical acceleration electrodes 36 and 38 are arranged so as to face each other. A coaxial waveguide 40 is inserted and fixed to the side surface of the high-frequency acceleration cavity body 34. The coaxial waveguide 40 includes an inner cylinder 42 and an outer cylinder 44 coaxially, and the tips of the inner cylinder 42 and the outer cylinder 44 are electrically connected by an antenna 46 and face the inside of the high-frequency acceleration cavity body 34. The space between the inner cylinder 42 and the outer cylinder 44 is under atmospheric pressure, and for vacuum sealing with the vacuum container 32,
A vacuum sealing member 48 such as ceramic is joined between the inner cylinder 42 and the outer cylinder 44.

According to the above configuration, the microwave is the inner tube of the coaxial waveguide 40.
When propagating between 42 and the outer cylinder 44, the magnetic field 50 is generated around the antenna 46 by being radiated from the antenna 46 at the tip thereof. Then, by resonating with this magnetic field 50, a magnetic field 52 is generated in the high frequency acceleration cavity 30, and an electric field 54 is generated between the acceleration electrodes 36 and 38 by this magnetic field 52 to accelerate the electron beam in the vacuum container 32.

The tip of the coaxial waveguide 40 needs to be cooled with water because heat is generated by the high frequency current. Therefore, a cooling channel (hereinafter referred to as a cooling water channel) is formed in the outer cylinder 44 to cool it by supplying water from the outside. However, since the outer cylinder 44 is thin, the present invention is applied here. To form a cooling flow path.

Next, FIG. 4 shows the structure of the tip portion of the coaxial waveguide 40 to which the present invention is applied. A flange 56 is provided on the side surface of the high-frequency acceleration cavity body 30, and the tip portion of the coaxial waveguide 40 is inserted and attached thereto. The flange 56 and the flange member 68 of the coaxial waveguide 40 are connected by a bolt nut (not shown) with a seal member 58 for vacuum sealing interposed therebetween.

The inner cylinder 42 of the coaxial waveguide 40 is made of oxygen-free copper, and the inner cylinder members 57 and 60 are connected with a bolt 64 with a heat-resistant glass ring 62 sandwiched between them. The inner cylinder member 58 is joined by brazing. The glass ring 62 has a plurality of holes 62a.

The outer cylinder 44 is made of oxygen-free copper, and the flange portion 66a of the outer cylinder member 66 is fixed to the flange member 68 with bolts (not shown). The outer cylinder inner member 70 is joined to the flange member 68 by brazing. An outer cylinder outer member 72 is joined to the outer periphery of the outer cylinder inner member 70 by brazing the upper and lower parts, and a cooling water passage 74 is formed between the outer cylinder inner member 70 and the outer cylinder outer member 72 over the entire circumference. are doing. In this cooling water passage 74, the cooling water injected from the pipe 76
It is supplied through the round hole 78 formed in the 68 and the round holes 80, 82 formed in the outer cylinder inner member 70, and is discharged around the entire circumference of the outer cylinder 44 in the other portion of the flange member 68. Discharged from the outlet. Plugs 84 and 86 are screwed into the drill hole opening ends 83 and 85 formed when the round holes 78 and 82 are opened by a drill, and are further brazed and sealed.

A round hole 88 is provided in the other portion of the flange member 68 as a cooling air supply path. This round hole 88 is a round hole formed in the outer cylinder inner member 70 for the cooling air supplied from the pipe 89.
It is supplied to the space 92 between the inner and outer cylinders through 90. This cooling air exits from the hole 62a of the glass ring 62 and is discharged between the inner and outer cylinders. At the end of the round hole 88, screw in the plug 91,
Furthermore, it is sealed by brazing.

A copper plate 92 made of oxygen-free copper is screwed to the tip of the inner cylinder 42. An antenna mounting member 94 made of oxygen-free copper is brazed to the tip of the outer cylinder inner member 70. And the copper plate 92
Between the antenna mounting member 94 and the antenna mounting member made of oxygen-free copper
46 is screwed to electrically connect the two.

The vacuum sealing member 48 blocks the space 92 (atmospheric pressure) between the inner and outer cylinders from the inside of the high-frequency acceleration cavity body 30 (vacuum), and is made of a ring-shaped ceramics 96. However, if the ceramics 96 is directly brazed to the inner tubular member 58 and the outer tubular member 70 made of oxygen-free copper, the ceramics 96 may crack due to the difference in thermal expansion coefficient. Rings 98,1 made of Kovar (an alloy of iron and cobalt) whose thermal expansion coefficient is close to that of ceramics on the outer circumference
Brazing 00, this ring-shaped Kovar 98,100
The lower end portion of the is brazed to the inner tubular member 58 and the outer tubular member 70. Therefore, brazing pools 102, 104 are formed on the inner cylinder member 58 and the outer cylinder member 70, and ring-shaped Kovar 98, 10 are formed on the brazing pools 102, 104.
The lower end of 0 is inserted and brazed. In this way, the space 92 between the inner and outer cylinders is sealed by the vacuum sealing member 48, and air is prevented from leaking into the high-frequency heating cavity body 30.

In the configuration of FIG. 4, this invention is applied to the round hole 82 formed in the outer cylinder inner member 70. The detailed structure of the round hole 82 is shown in FIG. The cooling water supply port 78 is provided in the outer cylinder inner member 70.
Besides, a discharge port 79 is formed. Three round holes 82-1 to 82-3 communicate with the supply port 78. 3 for outlet 79
Round holes 81-1 to 81-3 of the book communicate with each other. Round hole 82-1
The upper ends of the through holes 82-1 to 82-3 and the upper ends of the round holes 81-1 to 81-3 communicate with the cooling water passage 74. In addition, the lower end of each of these plugs 8 is composed of a cylindrical screw made of oxygen-free copper.
6,91 are respectively screwed, brazed and sealed. A partition plate 99 is provided in the cooling water passage 74.

As a result, the cooling water supplied from the supply port 78
82-1 to 82-3 are branched into 82-1 to 82-3, flow into the cooling water passage 74, and make one round around the outer cylinder inner member 70.
And is discharged from the discharge port 79.

The process of forming the round hole 82 in the outer cylinder inner member 70 is shown in FIG. From the state where no holes are formed as shown in FIG. 5 (a), three round holes 82 (82-1 to 82-3) are opened from the lower end by a drill as shown in FIG. 5 (b). . Further, a round hole 78 is opened obliquely from the side to communicate with the round holes 82-1 to 82-3. Then, a screw thread is formed at the opening end portion 85 of the drill hole, the plug 86 is screwed in, and the plug 86 and the opening end portion 85 are joined by brazing and sealed (the outer cylinder inner member 70 is made of oxygen-free copper). Since it is difficult to weld normally, it is sealed by brazing.).

According to such a manufacturing process, the round hole 82 and the plug 85 can be easily formed into a perfect circle, so that the surfaces can be aligned with high accuracy, and the plug 86 can be attached by screwing. The open end portion 85 can be reliably sealed to reliably prevent water leakage.

[Modification]

In the above-mentioned embodiment, the case where the present invention is applied to the cooling flow path of the high frequency acceleration cavity of the synchrotron has been described, but it can also be applied to the cooling flow path of various thin devices and structures.

[Effect of device]

As described above, according to the present invention, since a plurality of round holes are formed in the thin portion, the required flow passage cross-sectional area can be obtained. Also, the sealing of the open end of the round hole is
Since the round holes and the circular plugs are fitted to each other, highly accurate face-to-face contact is possible, and leakage of the cooling fluid and vacuum leakage can be prevented.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, showing a detailed structure of the round hole 82 in FIG. FIG. 2 is a diagram showing a conventional cooling channel structure. FIG. 3 is a schematic configuration diagram of a high frequency acceleration cavity of the synchrotron. FIG. 4 is a sectional view showing the detailed structure of the tip portion of the coaxial waveguide 40 in FIG. FIG. 5 is a sectional view showing a step of forming the round hole 82 in FIG. In the figure, 78, 82, 74, 81, 79 ... Cooling water channel (cooling channel), 70 ...
… Inner member of outer cylinder (thin section), 81, 82 …… Round hole, 86, 91 ……
Plug, 85, 93 ... Open end of drill hole.

Claims (1)

[Scope of utility model registration request] 1. A cooling flow path, which is provided between a cooling section formed in a device or a structure and a cooling fluid supply / discharge port, has one end communicating with the cooling unit and the other end communicating with the supply / discharge port. In the portion that passes through the thin portion of the equipment or structure, the tip is communicated with either the cooling unit or the supply / discharge port by boring from the outside of the end of the thin portion of the equipment or structure and the side portion is cooled. A plurality of round holes communicating with the other part of the hole or the supply / discharge port to secure the cross-sectional area of the flow path, and a circular plug is fitted into the opening outside the end of these round holes to seal. The cooling flow path structure in the thin portion is characterized in that the cooling flow path that connects the cooling unit and the supply / discharge port is formed.