WO2013073540A1

WO2013073540A1 - Pipe connection structure and pipe connection method

Info

Publication number: WO2013073540A1
Application number: PCT/JP2012/079436
Authority: WO
Inventors: 暁小路口; 吉川　実; 坂本　仁; 正樹千葉; 賢一稲葉; 有仁松永
Original assignee: 日本電気株式会社
Priority date: 2011-11-17
Filing date: 2012-11-07
Publication date: 2013-05-23
Also published as: JPWO2013073540A1

Abstract

This pipe connection structure comprises: two pipes having one end section of each abutting the other, and through which a reactive substance flows; a sealing means formed by a material having low reactivity to the reactive substance, said sealing means arranged in an area including the abutted section, and sealing the reactive substance inside the pipes; a coupling means that couples the two pipes by being arranged in the abutted section sealed by the sealing means; and a reinforcing means that reinforces the coupling means.

Description

Piping connection structure and piping connection method

The present invention relates to a pipe connection structure and a pipe connection method, and more particularly to a pipe connection structure and a pipe connection method for connecting pipes in which a highly reactive substance flows inside.

As the mounting density of components arranged in an electronic device increases, the density of heat generated from the electronic device increases. Furthermore, as the mounting density of components increases, it is difficult to arrange a cooling system that removes heat generated from each component in the vicinity of the heat generating component. In view of this, a technique has been proposed in which heat generated from a component is transported away from the heat generating component and cooled.
As one of the technologies, there is a boiling cooling device using a phase change of a refrigerant. In the boiling cooling device, the heat generated from the parts is circulated using a pipe between the boiling part arranged near the heat-generating part and the condensing part arranged near the outside air. To dissipate heat to the outside air.
Here, when the boiling cooling device is arranged in an electronic device that guarantees long-term operation, the boiling cooling device is required to guarantee long-term confidentiality in order to continue the circulation of heat by the refrigerant. In particular, a connection structure that can maintain high airtightness for a long period of time at a low cost is required in the boiling part, the condensing part, and the pipe butt part.
The technique regarding the connection structure of piping is disclosed by patent document 1 and patent document 2, for example. In the pipe connection method disclosed in Patent Document 1, after the connecting surfaces of a pair of pipes are chamfered into a taper shape and fitted, an adhesive is applied to the fitting portion, and the connection pipe is slid upward. To cure. Finally, the boundary between the pipe and the connecting pipe is fixed using an adhesive tape.
On the other hand, in the pipe connection method of Patent Document 2, a pair of metal tubes are inserted from both ends of the resin sleeve, and covered with the metal sleeve and the heat shrinkable tube. Thereby, the butt portion of the metal tube is sealed by the resin sleeve, the metal sleeve, and the heat shrinkable tube.

JP 2000-213671 A Japanese Patent Laid-Open No. 2008-0775809

However, when the techniques of Patent Document 1 and Patent Document 2 are applied to the connection of piping used in the boiling cooling device, the adhesive or the resin sleeve reacts with the refrigerant flowing in the piping. When the adhesive and the refrigerant, or the resin sleeve and the refrigerant continue to react over a long period of time, the adhesive or the resin sleeve is deteriorated and the airtightness is lowered. As described above, in the pipe connection structures of Patent Document 1 and Patent Document 2, when a highly reactive substance (hereinafter referred to as “reactive substance”) is caused to flow in the pipe, airtightness is maintained for a long period of time. There was a problem that it was not possible.
The present invention has been made in view of the above points, and provides a pipe connection structure and a pipe connection method that solve the problem that the airtightness of the pipe butt portion cannot be maintained over a long period of time when a reactive substance is caused to flow in the pipe. The purpose is to do.

In order to achieve the above object, the pipe connection structure according to the present invention is formed of two pipes in which a reactive substance flows and one end is abutted, and a material having low reactivity with the reactive substance. The sealing means for sealing the reactive substance in the pipe by being disposed in the region including the butted portion whose ends are butted together, and the butting portion sealed by the sealing means, 2 A connecting means for connecting the pipes of the book; and a reinforcing means for reinforcing the connecting means.
In order to achieve the above object, the pipe connection method according to the present invention butts one end of two pipes through which a reactive substance flows, and butts the end part of a material having low reactivity with the reactive substance. The reactive substance is sealed in the pipe by arranging it in the region including the butted part, and the two pipes are connected by being arranged in the sealed butted part, and the two pipes are connected. Reinforce the damaged state.

ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a highly reactive substance (reactive substance) is made to flow, the piping connection structure and piping connection method which can maintain the airtightness of a pipe butt | matching part over a long period of time are obtained. .

1 is a cross-sectional view of a pipe connection structure 10 according to a first embodiment of the present invention. It is sectional drawing of the piping connection structure 100 which concerns on the 2nd Embodiment of this invention. It is sectional drawing of another piping connection structure 100B which concerns on the 2nd Embodiment of this invention. It is sectional drawing of another piping connection structure 100C which concerns on the 2nd Embodiment of this invention. It is sectional drawing of another piping connection structure 100D which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the piping connection structure 200 which concerns on the 3rd Embodiment of this invention. It is sectional drawing of another piping connection structure 200B which concerns on the 3rd Embodiment of this invention. It is sectional drawing of another piping connection structure 200C which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the piping connection structure 300 which concerns on the 4th Embodiment of this invention. It is an external appearance perspective view of the elastic tube 330 which concerns on the 4th Embodiment of this invention. It is an enlarged view near the groove | channel 311 of the pipe connection structure 300 which concerns on the 4th Embodiment of this invention. It is sectional drawing of another piping connection structure 300B which concerns on the 4th Embodiment of this invention. It is sectional drawing of another piping connection structure 300C which concerns on the 4th Embodiment of this invention. It is an enlarged view near the groove | channel 311C of another pipe connection structure 300C which concerns on the 4th Embodiment of this invention.

(First embodiment)
A first embodiment will be described. A cross-sectional view of the pipe connection structure according to this embodiment is shown in FIG. In FIG. 1, the pipe connection structure 10 according to the present embodiment includes two

pipes

20 and 30, a sealing unit 40, a coupling unit 50, and a reinforcing unit 60.
The

pipes

20 and 30 are metal pipes through which a gaseous or liquid medium (hereinafter referred to as “reactive substance”) having high reactivity with the resin flows. Here, the reactive substance is a relatively low boiling point antifreeze or the like. In the

pipes

20 and 30, the end portions that face each other are processed flat.
The sealing unit 40 is formed of a material having low reactivity with the reactive substance flowing in the

pipes

20 and 30. The sealing means 40 is disposed in a region including the butt portion on the upper surface of the

pipes

20 and 30. The reactive substance is sealed in the

pipes

20 and 30 by disposing the sealing means 40 in the region including the butt portion on the upper surface of the

pipes

20 and 30. The sealing unit 40 is formed of a metal having low hardness such as aluminum.
The connecting means 50 connects the

pipes

20 and 30 by being disposed above the sealing means 40. The connecting means 50 is formed of, for example, an elastic tube, a heat shrinkable tube, or a resin.
The reinforcing means 60 reinforces the connected state of the

pipes

20 and 30 by the connecting means 50. The reinforcing means 60 is formed by, for example, a fixing metal or an adhesive.
In the pipe connection structure 10 according to the present embodiment, the end portions of the

pipes

20 and 30 are abutted, and the sealing means 40, the coupling means 50, and the reinforcing means 60 are arranged in this order in the region including the abutting portion. The

pipes

20 and 30 are connected.
In the pipe connection structure 10 configured as described above, the sealing means 40 is disposed in a region including the butt portion on the upper surface of the

pipes

20 and 30, thereby preventing the reactive substance from flowing out from the butt portion. be able to. Therefore, the airtightness in the

pipes

20 and 30 can be improved. Since the sealing means 40 is formed of a material having low reactivity with the reactive substance flowing in the

pipes

20 and 30, the sealing means 40 reacts with the reactive substance and the sealing means 40. Can be prevented from deteriorating.
In the above-described pipe connection structure 10, the two

pipes

20, 30 are connected by disposing the connecting means 50 at the butt portion of the

pipes

20, 30 sealed with the reactive substance by the sealing means 40. To do. Thereby, the piping 20 and 30 can be connected, without the member which comprises the connection means 50, and the reactive substance reacting and the member which comprises the connection means 50 deteriorates.
Further, in the pipe connection structure 10 described above, since the connection state of the

pipes

20 and 30 is reinforced using the reinforcing means 60, the airtightness of the butt portion can be maintained over a long period of time.
As described above, the pipe connection structure 10 according to the present embodiment can maintain the airtightness of the pipe connection portion over a long period of time even when the reactive substance is flowed.
In addition, in the piping connection structure 10 which concerns on this embodiment, the edge part which the

piping

20 and 30 is faced is planarized. In this case, the amount of the reactive substance flowing out from the butt portion of the

pipes

20 and 30 can be minimized. Therefore, the airtightness in the

pipes

20 and 30 can be further enhanced. In addition, since the process with respect to the

piping

20 and 30 is only flattening using a file etc., a process cost can be restrained low.
Here, an elastic tube can be applied as the connecting means 50. In this case, a metal film (metal plating) disposed on the inner surface of the elastic tube or a metal film (metal foil) disposed in the upper surface region of the

pipes

20 and 30 including the butt portion is applied as the sealing means 40. Can do. Furthermore, in this case, for example, a fixing bracket including a ring-shaped band portion and a tightening portion that adjusts the ring diameter of the band portion can be applied as the reinforcing means 60. Further, the elastic tube can be heated and contracted to act as the reinforcing means 60.
Further, a metal film (metal foil) wound around the upper surface region of the

pipes

20 and 30 including the butt portions as the sealing means 40, and a resin member covering the upper surface region including the butt portions of the

pipes

20 and 30 as the connecting means 50 are provided. Can be applied. In this case, the adhesiveness of the resin member acts as the reinforcing means 60.
Even with these configurations, the airtightness of the pipe butt can be maintained for a long time when the reactive substance is caused to flow.
(Second Embodiment)
A second embodiment will be described. A cross-sectional view of the pipe connection structure according to the present embodiment is shown in FIG. In FIG. 2, the pipe connection structure 100 according to this embodiment includes two boiling cooling

pipes

110 and 120, an elastic tube 130 having an inner surface provided with metal plating 131, and two

fasteners

140 and 150.
The boiling

cooling pipes

110 and 120 are metal pipes whose ends (butting surfaces) are processed to be flat, and a refrigerant for boiling cooling flows inside. The refrigerant for boiling cooling is an antifreeze having a relatively low boiling point, and for example, organic refrigerants such as HFC (hydrofluorocarbon) and HFE (hydrofluoroether) can be applied. In this embodiment, an aluminum pipe having a diameter of about 12 mm is applied as the boiling cooling

pipes

110 and 120. By applying inexpensive and low hardness aluminum pipes as the boiling cooling

pipes

110 and 120, the material cost can be kept low, the end can be easily flattened, and the processing cost can be kept low. .
The elastic tube 130 whose inner surface is provided with the metal plating 131 is a tube formed of an elastic body having high stretchability. In the present embodiment, the elastic tube 130 is a rubber hose made of butyl rubber having an inner diameter of about 11.5 mm, an outer diameter of about 17.5 mm, and a length of about 3 cm, and aluminum is plated on the inner surface using an electroplating method or the like. . By applying aluminum having a low hardness as the plating metal, it is possible to suppress the occurrence of cracks after plating.
For example, a general hose clamp is applied to the

fasteners

140 and 150.
When connecting the boiling cooling

pipes

110 and 120 using the elastic tube 130 and the

fasteners

140 and 150 to which the metal plating 131 is applied, first, the butt portions of the boiling cooling

pipes

110 and 120 are flattened with a file or the like. Process. By flattening the butting portions of the boiling cooling

pipes

110 and 120, the amount of refrigerant flowing out from the butting portions can be minimized. Further, since the processing for the boiling cooling

pipes

110 and 120 is only flattening of the end face using a file or the like, the processing cost can be kept low.
Then, the elastic tube 130 having the inner surface provided with the metal plating 131 is passed through one of the boiling cooling

pipes

110 and 120, and the ends of the boiling cooling

pipes

110 and 120 are brought into contact with each other. Thereafter, the elastic tube 130 passed in advance is slid above the butt portion of the

pipes

110 and 120, and the boiling cooling

pipes

110 and 120 are connected. In this state, both ends of the elastic tube 130 are pressed toward the center using the

fasteners

140 and 150 to reinforce the connection state of the boiling cooling

pipes

110 and 120.
In the above-described pipe connection structure 100, since the metal plating 131 is applied to the inner surface of the elastic tube 130, the refrigerant flowing out from the butt portion of the boiling cooling

pipes

110 and 120, the organic material constituting the elastic tube 130, and Can be prevented from contacting directly. As a result, deterioration of the elastic tube 130 due to reaction with the refrigerant is suppressed.
In addition, since the boiling cooling

pipes

110 and 120 are reinforced by the

fasteners

140 and 150 from above the elastic tube 130, the adhesion between the boiling cooling

pipes

110 and 120 and the elastic tube 130 can be improved. The connected state of the boiling cooling

pipes

110 and 120 can be maintained over a long period of time. In addition, since a general hose clamp etc. can be applied to the

fasteners

140 and 150, material cost can be suppressed low.
Therefore, the pipe connection structure 100 according to the present embodiment can maintain the airtightness of the connection portion of the boiling cooling

pipes

110 and 120 for a long period even when a highly reactive refrigerant flows.
In the above description, the elastic tube 130 is passed through one of the boiling cooling

pipes

110 and 120 in advance, and the elastic tube 130 is slid above the butt portion of the

pipes

110 and 120. However, the present invention is not limited to this, and the boiling cooling

pipes

110 and 120 may be inserted from both ends of the elastic tube 130, and the ends of the

pipes

110 and 120 may be butted together inside the elastic tube 130.
Further, instead of flattening the end face orthogonal to the longitudinal direction of the boiling cooling pipe, the face obtained by obliquely cutting the end part can be flattened. FIG. 3 shows an example in which the end portion of the boiling cooling pipe is obliquely cut and butted, and the butted portion is connected using an elastic tube 130B having metal plating 131B on the inner surface and

fasteners

140B and 150B. Indicates.
In the pipe connection structure 100B shown in FIG. 3, the end of the boiling cooling pipe 110B is obtained by cutting the end of the boiling cooling pipe 110B obliquely at an angle θ from the inner side surface to the outer side surface of the pipe. The inner side surface is formed in a tapered shape. On the other hand, the end portion of the boiling cooling pipe 120B is formed in a tapered shape with the outer surface protruding by cutting in an oblique direction at an angle θ from the outer surface toward the inner surface.
When the end portions of the boiling cooling

pipes

110B and 120B are cut and abutted in an oblique direction, the tapered surfaces of each other are fitted to each other, so that the connection state of the boiling cooling

pipes

110B and 120B is orthogonal to the longitudinal direction of the pipes. Shifting in the radial direction is suppressed.
On the other hand, when the boiling cooling pipe is formed of a soft metal (for example, aluminum) that is easy to process, the end may be flattened and processed so that the outer diameter gradually decreases toward the end. . In FIG. 4, the outer diameter of the region in the vicinity of the ends of the boiling cooling

pipes

110C and 120C is gradually reduced, and the butt portion is used with the elastic tube 130C having the metal plating 131C applied on the inner surface and the

fasteners

140C and 150C. An example of reinforcement is shown.
In the pipe connection structure 100C shown in FIG. 4, the boiling cooling

pipes

110C and 120C are processed so that the outer diameter gradually decreases toward the end. By gradually reducing the outer diameters of the boiling cooling

pipes

110C and 120C toward the ends, the boiling cooling

pipes

110C and 120C can be smoothly inserted into the elastic tube 130C. Therefore, it is possible to prevent the metal plating 131C of the elastic tube 130C from being damaged when the boiling cooling

pipes

110C and 120C are inserted.
Furthermore, in the above-described

pipe connection structures

100, 100B, and 100C, a heat-shrinkable tube having a metal plating on the inner side can be used instead of the elastic tube and the fastener having the metal plating on the inner surface. FIG. 5 shows an example in which the boiling

cooling pipes

110D and 120D are connected using a heat shrinkable tube 160D having a metal plating 161D on the inside. The metal plating 161D applied to the inside of the heat shrinkable tube 160D corresponds to the sealing means, and the tube main body of the heat shrinkable tube 160D corresponds to the connecting means, and the heat shrinkability of the heat shrinkable tube 160D functions as the reinforcing means.
The pipe connection structure 100D shown in FIG. 5 is formed as follows. That is, the ends of the boiling

cooling pipes

110D and 120D are flattened, and the heat shrinkable tube 160D having the metal plating 161D on the inside is passed through one of the boiling

cooling pipes

110D and 120D. Thereafter, the end portions of each other are butted together, and the heat-shrinkable tube 160D previously passed is slid above the butted portion, and the heat-shrinkable tube 160D is heated in this state.
When using an elastic tube made of butyl rubber or the like, it is necessary to use an elastic tube having an inner diameter equivalent to the outer diameter of the boiling cooling pipe, whereas when using a heat-shrinkable tube, the heat-shrinkable tube is heated by being heated. Since the inner diameter is reduced to the outer diameter of the boiling cooling pipe, one type of heat shrinkable tube can be used for boiling cooling pipes having various outer diameters.
In addition, since the inner diameter of the heat-shrinkable tube before heating can be designed to be larger than the outer diameter of the boiling cooling pipe, compared with the case where an elastic tube having an inner diameter equivalent to the outer diameter of the boiling cooling pipe is used. The heat-shrinkable tube can be easily disposed above the butt portion of the boiling cooling pipe.
Furthermore, the heat-shrinkable tube shrinks over the entire length of the boiling cooling pipe when heated. Therefore, compared with the case where an elastic tube made of butyl rubber or the like is used, the adhesion to the boiling cooling pipe can be improved, and the airtight reliability of the connecting portion can be improved.
(Third embodiment)
A third embodiment will be described. A cross-sectional view of the pipe connection structure according to this embodiment is shown in FIG. In FIG. 6, the pipe connection structure 200 according to the present embodiment includes two boiling cooling

pipes

210 and 220, a metal foil 230, and a heat shrinkable tube 240.
Boiling cooling

pipes

210 and 220 are aluminum pipes whose ends are flattened, and a refrigerant for boiling cooling flows inside.
The metal foil 230 is a metal foil having a thickness of about 0.05 to 0.1 mm. As the material of the metal foil 230, it is desirable to apply a metal having good flexibility, shape following property and strength. In the present embodiment, an aluminum foil having a thickness of about 0.1 mm, a width of about 30 mm, and a length of about 40 mm is applied as the metal foil 230.
The heat-shrinkable tube 240 is a tube having the characteristics of a fluoropolymer that stores a shape, and shrinks in the radial direction when heated. Here, the tube main body of the heat shrinkable tube 240 corresponds to the connecting means, and the heat shrinkability of the heat shrinkable tube 240 functions as a reinforcing means.
When the boiling cooling

pipes

210 and 220 are connected using the metal foil 230 and the heat-shrinkable tube 240, first, the ends of the boiling cooling

pipes

210 and 220 are flattened with a file or the like, and the boiling cooling

pipes

210 and 220 are connected. The heat shrinkable tube 240 is passed through one of them. Subsequently, the ends of the boiling cooling

pipes

210 and 220 are brought into contact with each other. Further, after winding the metal foil 230 a plurality of times above the butting portion, the heat shrinkable tube 240 previously passed above the metal foil 230 is slid. In this state, the heat-shrinkable tube 240 is heated and contracted, and the boiling cooling

pipes

210 and 220 and the metal foil 230 are connected.
In the pipe connection structure 200 according to the present embodiment, the refrigerant leaks to the outside from the butt portion of the boiling cooling

pipes

210 and 220 by winding the metal foil 230 around the entire circumference of the butt portion of the boiling cooling

pipes

210 and 220. To suppress. Furthermore, by disposing the metal foil 230 between the butted portions of the boiling cooling

pipes

210 and 220 and the heat shrinkable tube 240, the refrigerant and the heat shrinkable tube 240 come into contact with each other and react, and the heat shrinkable tube 240 deteriorates. To suppress.
Furthermore, the heat-shrinkable tube 240 is heated to connect and fix the butting portions of the boiling cooling

pipes

210 and 220, thereby maintaining the connected state of the boiling cooling

pipes

210 and 220 over a long period of time.
Therefore, the pipe connection structure 200 according to the present embodiment can maintain the airtightness of the pipe connection portion for a long period of time even when a highly reactive refrigerant is flowed.
Here, when aluminum foil having a relatively low hardness is used as the winding member of the butt portion, aluminum is provided along the surfaces of the boiling cooling

pipes

210 and 220 as compared with the case of using a metal foil made of a metal having high hardness. The foil is deformed. As a result, the refrigerant is prevented from leaking outside through the gap between the boiling cooling

pipes

210 and 220 and the aluminum foil.
Instead of the heat shrinkable tube 240, a resin adhesive can be used. FIG. 7 shows an example in which the boiling cooling

pipes

210B and 220B are connected using the metal foil 230B and the resin adhesive 250B. The resin-based adhesive 250B is a resin-based adhesive that is cured by heating, irradiation with ultraviolet rays, or addition of a solvent, and is, for example, an adhesive made of an epoxy resin.
In the pipe connection structure 200B shown in FIG. 7, after the metal foil 230B is wound around the butt portion of the boiling cooling

pipes

210B and 220B, the resin adhesive 250B is applied so as to cover the entire metal foil 230B, and the resin adhesive It is formed by curing agent 250B. When the resin adhesive 250B is cured, the connection state of the boiling cooling

pipes

210B and 220B and the metal foil 230B is fixed.
Here, the resin-based adhesive 250B functions as a connecting means by being applied to the butted portions of the

pipes

210B and 220B around which the metal foil 230B is wound. Further, the resin adhesive 250B acts as a reinforcing means by being cured.
On the other hand, an elastic tube and a fastener can be used instead of the heat-shrinkable tube and the resin adhesive. FIG. 8 shows a cross-sectional view of a pipe connection structure 200C in which the butted portions of the boiling cooling

pipes

210C and 220C are connected using a metal foil 230C, an elastic tube 260C, and

fasteners

270C and 280C.
When the elastic tube 260C is used, the ends of the boiling cooling

pipes

210C and 220C are butted together while the elastic tube 260C is passed through one of the boiling cooling

pipes

210C and 220C. In this state, the metal foil 230C is wound a plurality of times above the butted portion, and the elastic tube 260C previously passed over the metal foil 230C is slid. Further, by pressing both ends of the elastic tube 260C in the center

direction using fasteners

270C and 280C, respectively, the connection state of the boiling cooling

pipes

210C and 220C, the metal foil 230C and the elastic tube 260C is reinforced.
By applying the pipe connection structures 200 </ b> B and 200 </ b> C, the air tightness of the pipe connection portion can be maintained over a long period of time even when a highly reactive refrigerant flows.
(Fourth embodiment)
A fourth embodiment will be described. FIG. 9 shows a cross-sectional view of the pipe connection structure according to this embodiment. 9, the pipe connection structure 300 according to this embodiment includes two boiling cooling

pipes

310 and 320 having

grooves

311 and 321 formed on the outer peripheral surface, an elastic tube 330 provided with metal plating 331, and two

Fasteners

340 and 350 are provided.
The boiling

cooling pipes

310 and 320 are aluminum pipes whose ends are flattened, for example, having a diameter of about 12 mm, and a refrigerant for boiling cooling flows inside.

Grooves

311 and 321 are formed on the outer peripheral surface at a position away from the ends of the boiling cooling

pipes

310 and 320 by a predetermined distance. In the present embodiment,

grooves

311 and 321 having a square cross section with a depth of about 1 mm and a width of about 10 mm are formed on the outer peripheral surfaces of the boiling cooling

pipes

310 and 320 at a distance of about 5 to 15 mm from the end. It is formed all around.
The elastic tube 330 is a stretchable tube having a metal plating 331 on the inner surface. In this embodiment, a rubber hose made of butyl rubber having an inner diameter of about 11.5 mm, an outer diameter of about 17.5 mm, and a length of about 40 mm is used as the elastic tube 330, and aluminum is plated on the inner surface using an electroplating method or the like. Further, on the surface of the elastic tube 330, a marking 332 is printed in an area about 5 to 15 mm away from the center position. An example of the appearance of the elastic tube 330 is shown in FIG.
The

fasteners

340 and 350 include fixed

band portions

341 and 351 and

fastening portions

342 and 352, respectively. The fixed

band portions

341 and 351 have a ring shape in which a long body having a width smaller than the width of the

grooves

311 and 321 of the boiling cooling

pipes

310 and 320 is wound once. In the present embodiment, the fixed

band portions

341 and 351 have a ring shape in which a long stainless steel tape having a width of about 7 mm is wound once. On the other hand, the tightening

portions

342 and 352 have screw holes, and the ring diameters of the fixed

band portions

341 and 351 change by rotating the screw holes in a predetermined direction by a driver or the like. After the fixing

band portions

341 and 351 are wound around the object to be fixed, the objects to be fixed are fixed by tightening the fixing

band portions

341 and 351 in the direction in which the ring diameter of the fixing

band portions

341 and 351 is reduced using the tightening

portions

342 and 352.
When the boiling cooling

pipes

310 and 320 are connected using the elastic tube 330 and the

fasteners

340 and 350 to which the metal plating 331 is applied, first, the ends of the boiling cooling

pipes

310 and 320 are flattened with a file or the like. Turn into.
Next, a mark for positioning the elastic tube 330 is attached with a magic or the like at a position half the length of the elastic tube 330 from the ends of the boiling cooling

pipes

310 and 320. In the present embodiment, “x” marks are applied to the surfaces 20 mm inside from the ends of the boiling cooling

pipes

310 and 320 using magic. By aligning the end portion of the elastic tube 330 with the X mark, the longitudinal positions of the markings 332 printed on the elastic tube 330 and the

grooves

311 and 321 formed in the boiling cooling

pipes

310 and 320 coincide with each other.
Further, the ring-shaped

fixing band portions

341 and 351 of the

fasteners

340 and 350 are passed through the boiling cooling

pipes

310 and 320, respectively, and the elastic tube 330 is passed through one of the boiling cooling

pipes

310 and 320.
In this state, the ends of the boiling cooling

pipes

310 and 320 are butted together, and the elastic tube 330 that has been passed in advance is disposed between the X mark and the X mark attached to the surface of the boiling cooling

pipes

310 and 320. Slide so that. Thereafter, the fixed

band portions

341 and 351 previously inserted through the boiling cooling

pipes

310 and 320 are moved into the marking areas printed on the elastic tube 330, and the screw holes of the tightening

portions

342 and 352 are screwed or the like. And the elastic tube 330 is fastened and fixed.
The marking 332 printed on the elastic tube 330 is positioned above the

grooves

311 and 321 formed in the

pipes

310 and 320, and the width (about 7 mm) of the fixed band portion 341 is larger than the width (about 10 mm) of the groove 311. Is also small. Accordingly, by reducing the diameters of the fixed

band portions

341 and 351 using the tightening

portions

342 and 352, the elastic tube 330 is pressed by the fixed band portion 341 and deformed along the wall surfaces of the

grooves

311 and 321. Is inserted into the

grooves

311 and 321. FIG. 11 shows a state where the upper position of the groove 311 formed in the pipe 310 is pressed by the fastener 340. When the elastic tube 330 and a part of the fixed band portion 341 are fitted into the groove 311, the elastic tube 330 is suppressed from moving in the longitudinal direction of the

pipes

310 and 320. Therefore, the connection strength between the elastic tube 330 and the pipe 310 is increased, and the connection state of the boiling cooling pipe 310 can be firmly maintained.
As described above, in the pipe connection structure 300 according to the present embodiment, the butted portions of the boiling cooling

pipes

310 and 320 are connected by the elastic tube 330 to which the metal plating 331 is applied. Further, by reinforcing the connection state by the elastic tube 330 using the

fasteners

340 and 350, the airtightness of the pipe butt portion can be maintained over a long period of time even when a highly reactive refrigerant flows. it can.
Further, in the pipe connection structure 300 according to the present embodiment,

grooves

311 and 321 are formed on the outer peripheral surfaces of the boiling cooling

pipes

310 and 320, and the upper portions of the

grooves

311 and 321 are pressed and fixed by using

fasteners

340 and 350. Then, a part of the elastic tube 330 and the

fasteners

340 and 350 were fitted into the

grooves

311 and 321. Accordingly, the elastic tube 330 and the

fasteners

340 and 350 are prevented from moving in the longitudinal direction of the

pipes

310 and 320. Therefore, the elastic tube 330 can be stably fixed to the boiling cooling

pipes

310 and 320, and the long-term reliability of the butt portion of the boiling cooling

pipes

310 and 320 can be improved.
Here, instead of the elastic tube 330 and the

fasteners

340 and 350 having the metal plating 331 on the inner surface, a heat-shrinkable tube having the metal plating on the inner side may be used. Further, instead of metal plating on the elastic tube or the heat shrinkable tube, a metal foil can be arranged on the inner surface side of the elastic tube or the heat shrinkable tube.
FIG. 12 shows a cross-sectional view of a pipe connection structure 300B in which boiling cooling

pipes

310B and 320B in which

grooves

311B and 321B are formed are connected using a metal foil 360B and a heat shrinkable tube 370B. In the present embodiment, a thin metal tape having a width approximately equal to the distance from the center position of the groove 311B of the pipe 310B to the center position of the groove 321B of the pipe 320B is used as the metal foil 360B.
When the boiling cooling

pipes

310B and 320B are connected using the metal foil 360B and the heat shrinkable tube 370B, the ends of the boiling cooling

pipes

310B and 320B are first flattened, and one of the boiling cooling

pipes

310B and 320B is flattened. After passing the heat-shrinkable tube 370B, the ends of each other are butted together.
Then, the metal foil 360B is wound around the butted portions of the

pipes

310B and 320B so that both ends of the metal foil 360B are located above the

grooves

311B and 321B of the

pipes

310B and 320B. Here, in this embodiment, since the width of the metal foil 360B is formed to be the same as the distance from the center position of the groove 311B of the pipe 310B to the center position of the groove 321B of the 320B, both ends of the metal foil 360B are grooves 311B. , 321B. Then, both ends of the metal foil 360B are folded inside the

grooves

311B and 321B along the wall surfaces of the

grooves

311B and 321B. Thereafter, the heat-shrinkable tube 370B passed in advance is slid above the metal foil 360B, and the heat-shrinkable tube 370B is heated and contracted in this state, thereby fixing the

pipes

310B and 320B and the metal foil 360B.
Even when the boiling cooling

pipes

310B and 320B are connected using the metal foil 360B and the heat-shrinkable tube 370B or when a highly reactive refrigerant flows, the airtightness of the pipe connection part is maintained for a long period of time. can do.
Furthermore, in the pipe connection structure 300B, the both ends of the metal foil 360B are folded inside the

grooves

311B and 321B along the wall surfaces of the

grooves

311B and 321B, so that the adhesion between the boiling cooling

pipes

310B and 320B and the metal foil 360B is improved. This increases the airtightness of the pipe connection.
Further, in the pipe connection structure 300B, the heat shrinkable tube 370B is heated and the heat shrinkable tube 370B contracts, so that part of the heat shrinkable tube 370B is fitted into the

grooves

311B and 321B. In this case, the adhesiveness between the boiling cooling

pipes

310B and 320B and the heat shrinkable tube 370B is increased, and the airtightness and long-term reliability of the pipe connection part are further improved.
On the other hand, instead of the heat-shrinkable tube 370B, the metal foil and the piping for boiling cooling can be fixed using a resin adhesive. FIG. 13 is a cross-sectional view of a pipe connection structure 300C in which boiling cooling

pipes

310C and 320C in which

grooves

311C and 321C are formed are connected using a metal foil 360C and a resin adhesive 380C.
When the resin-based adhesive 380C is used, the metal foil 360C is wound around the butting portions of the boiling cooling

pipes

310C and 320C, and the metal foil 360C is covered with both ends of the metal foil 360C being folded inside the

grooves

311C and 321C. In this way, a resin adhesive 380C is applied. Then, the piping 310C, 320C and the metal foil 360C are fixed by curing the resin adhesive 380C.
Even when the boiling cooling

pipes

310C and 320C are connected using the metal foil 360C and the resin adhesive 380C, or when a highly reactive refrigerant is allowed to flow, the airtightness of the pipe connecting part is maintained over a long period of time. Can be held.
Further, in the pipe connection structure 300C, the resin adhesive 380C is cured while being filled in the

grooves

311C and 321C. In this case, the adhesiveness between the boiling cooling

pipes

310C and 320C and the resin adhesive 380C is increased, and the airtightness and long-term reliability of the pipe connection part are further improved.
Note that when the resin adhesive 380C is used, it is desirable to form the

grooves

311C and 321C in a reverse taper shape. FIG. 14 shows a state in which the metal foil 360C is folded into a groove 321C formed in an inversely tapered shape and further fixed using a resin adhesive 380C. By filling the resin adhesive 380C into the groove 321C formed in the reverse taper type, the metal foil 360C folded along the inner wall of the groove 321C is firmly fixed in the groove 321C. Therefore, the connection state of the boiling cooling

pipes

310C and 320C is more stably maintained.
Here, instead of forming grooves on the outer peripheral surface of the boiling cooling pipe, the outer peripheral surface of the boiling cooling pipe is formed in an uneven shape, or the surface of the boiling cooling pipe is roughened by shaving with a file etc. You can also do it. In this case, due to the anchor effect, the elastic tube, the heat shrinkable tube, the resin adhesive, etc. can be firmly fixed to the boiling cooling pipe, and the airtightness and long-term reliability of the butt portion of the boiling cooling pipe are improved. be able to. Here, the anchor effect refers to an effect that the butt member enters the fine irregularities of the bonding surface and increases the adhesive force in connection.
In the above-described embodiment, the connection structure applied to the piping used in the boiling cooling device has been described. However, the connection structure may be applied to a piping connection structure other than the boiling cooling device that causes a medium that reacts with an organic material or the like to flow. it can. Moreover, although this invention was demonstrated with reference to embodiment, this invention is not limited to the said embodiment. Any design change or the like within a range not departing from the gist of the present invention is also included in the present invention.
This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2011-251845 for which it applied on November 17, 2011, and takes in those the indications of all here.

The present invention can be applied to all devices, systems, and services using pipes through which highly reactive substances flow.

10

Piping connection structure

20, 30 Piping 40 Sealing means 50 Connecting means 60 Reinforcing means 100, 100B, 100C, 100D Piping

connection structure

110, 110B, 110C, 110D

Boiling cooling pipe

120, 120B, 120C, 120D

Boiling cooling pipe

130, 130B, 130C Metal plated

elastic tube

131, 131B, 131C Metal plated 140, 140B,

140C Fastener

150, 150B, 150C Fastener 160D Heat-shrinkable tube 161D metal plated 200D, 200B , 200C Piping

connection structure

210, 210B, 210C Boiling cooling piping 220, 220B, 220C Boiling cooling piping 230, 230B, 230C Metal foil 240 Heat shrinkable tube 250B Resin adhesive

260C Elasticity Tube

270C,

280C Fastener

300, 300B, 300C

Pipe connection structure

310, 310B, 310C

Boiling cooling pipe

311, 311B,

311C Groove

320, 320B, 320C

Boiling cooling pipe

321, 321B, 321C Groove 330 Metal plating is applied Elastic tube 331 Metal plating 332

Marking

340, 350

Fastening bracket

341, 351

Fixed band part

342, 352

Fastening part

360B, 360C Metal foil 370B Heat shrinkable tube 380C Resin adhesive

Claims

Two pipes in which a reactive substance flows and one end is abutted,
A sealing unit that is formed of a material having low reactivity with the reactive substance and is disposed in a region including a butted portion with which the end is butted, and seals the reactive substance in the pipe;
A connecting means for connecting the two pipes by being arranged in the butting portion sealed by the sealing means;
Reinforcing means for reinforcing the connecting means;
Piping connection structure.
The connecting means is an elastic tube through which the pipe passes through a hollow portion,
The sealing means is a metal film disposed on the inner surface of the elastic tube,
The elastic tube acts as the reinforcing means by heat shrinking.
The pipe connection structure according to claim 1.
The pipe includes a groove on an outer peripheral surface in the vicinity of the butt portion,
A part of the elastic tube is disposed inside the groove.
The pipe connection structure according to claim 2.
The connecting means is an elastic tube through which the pipe passes through a hollow portion,
The sealing means is a metal film disposed on the outer peripheral surface of the pipe including the butt portion,
The elastic tube acts as the reinforcing means by heat shrinking.
The pipe connection structure according to claim 1.
The pipe includes a groove on an outer peripheral surface in the vicinity of the butt portion,
The elastic tube covers the groove;
A part of the elastic tube and a part of the metal film disposed on the outer peripheral surface of the pipe including the butting portion are disposed inside the groove.
The pipe connection structure according to claim 4.
The connecting means is an elastic tube through which the pipe passes through a hollow portion,
The sealing means is a metal film disposed on the inner surface of the elastic tube,
The reinforcing means is a fixture having a ring-shaped band part and a tightening part for adjusting the ring diameter of the band part.
The pipe connection structure according to claim 1.
The pipe includes a groove on an outer peripheral surface in the vicinity of the butt portion,
The band portion has a width narrower than the width of the groove,
A part of the elastic tube and a part of the band part are disposed inside the groove.
The pipe connection structure according to claim 6.
The connecting means is an elastic tube through which the pipe passes through a hollow portion,
The sealing means is a metal film disposed on the outer peripheral surface of the pipe including the butt portion,
The reinforcing means is a fixture having a ring-shaped band part and a tightening part for adjusting the ring diameter of the band part.
The pipe connection structure according to claim 1.
The pipe includes a groove on an outer peripheral surface in the vicinity of the butt portion,
The band portion has a width narrower than the width of the groove,
A portion of the elastic tube and a portion of the metal film disposed on the outer peripheral surface of the pipe including the butting portion and a portion of the band portion are disposed inside the groove;
The pipe connection structure according to claim 8.
The sealing means is a metal film disposed on the outer peripheral surface of the pipe including the butt portion,
The connecting means is a resin member that covers a region including the butt portion,
The resin member acts as the reinforcing means by having adhesiveness.
The pipe connection structure according to claim 1.
The pipe includes a groove on an outer peripheral surface in the vicinity of the butt portion,
A part of the metal film disposed on the outer peripheral surface of the pipe including the butt portion and a part of the resin member are disposed inside the groove.
The pipe connection structure according to claim 10.
The pipe connection structure according to any one of claims 1 to 11, wherein the end face of the pipe is flattened.
Butt one end of two pipes where reactive substances flow,
By disposing a material having low reactivity with the reactive substance in a region including the butted portion where the end portions are butted, the reactive substance is sealed in the pipe,
By connecting the two pipes by being arranged in the sealed butt portion,
Reinforcing the state where the two pipes are connected,
Piping connection method.
The pipe connection method according to claim 13, wherein a groove is formed on an outer peripheral surface of the pipe in the vicinity of the butt portion.
The pipe connection method according to claim 13 or 14, wherein a surface to be abutted at the end of the pipe is flattened.