JP2001280576A - Conduit connecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conduit connecting device for relaxing distortion due to thermal stress. SOLUTION: A connection pipe is formed in a double structure with an inner pipe and an outer pipe, having a heating portion and a heat insulating portion arranged between the inner pipe and the outer pipe, flanges formed at both ends of the connection pipe, a bellows arranged inside the connection pipe beyond the flange, and a flange connection. A conduit, provided on the sides of a reaction container and a recovery container, communicates with each container and formed in a double structure at least on its connection pipe side with an inner pipe and an outer pipe, having a heating portion and a heat insulating portion arranged between the inner pipe and the outer pipe and a flange formed at the end on the side of connection to the connection pipe. The conduit and the connection pipe are connected to each other via a gasket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, in a process of manufacturing by reduction of chloride refractory metals such as Ti and Zr, relates conduit connection device of an apparatus used for the separation of Mg and MgCl _2.

[0002]

2. Description of the Related Art As an example of a method for producing Ti, a method of obtaining Ti chloride from a Ti raw material and reducing the Ti chloride with Mg to obtain sponge titanium is widely used. Unreacted Mg and MgCl ₂ are contained in titanium sponge.
Is contained, the sponge titanium is transferred to a distillation tank to separate Mg and MgCl ₂ .

In the production process of Ti, various devices have been proposed. For example, the chloride of the metal to be produced is reduced with molten Mg, the deposited metal is further heated, and M
g and MgCl ₂ , and a condensing chamber for cooling and condensing the vaporized Mg and MgCl ₂ , both chambers being juxtaposed with each other and connected by a connecting pipe provided with heating means. An apparatus having such a structure has been proposed (Japanese Patent Application No. 57-93698). In this device,
A common cylinder is used for the condensing chamber and the reduction evaporation chamber. Mg and MgCl ₂ are deposited on the inner wall surface of the cylinder to disconnect the _two chambers, and then disposed in the reduction evaporation chamber. Provided for reaction.

[0004] The connecting pipes are detachably joined at the top or middle of both chambers by mechanical means.
The connecting pipe and the fluid conduit of the apparatus according to the above-mentioned patent application require that the pipe wall be maintained at a sufficiently high temperature in order to maintain the fluidity of Mg and MgCl ₂ flowing in the pipe, while the flange provided at each connecting end is required. In addition, in order to maintain the sealing performance of the packing, it is necessary to prevent heat deterioration of the packing made of heat-resistant rubber or the like sandwiched between both flanges by means such as water cooling of the flange portion. However, if the flange diameter is reduced due to design restrictions or restrictions on the installation location of the apparatus, a decrease in wall temperature occurs at the pipe connection part, that is, in the flange area to be cooled, such as Mg and MgCl _2. Disadvantageously tends to precipitate. When Mg is deposited, Mg has a problem that Mg has high thermal conductivity and is easily cooled, so that Mg is further deposited on Mg and, as a result, a tube is easily clogged.

[0005] In order to solve the above-mentioned problems, a transfer tube composed of two parts to be connected to each other is connected to each other so that a fluid flows through the inner surface of the tube until it reaches the opposite end of each tube part. There has been proposed a technique for connecting a high-temperature fluid conduit having a heating means for heating at a high temperature capable of maintaining fluidity, and a coupling means for airtightly connecting both pipe portions (Japanese Patent Application Laid-Open No. 59-1984).
-80593). In this technique, the heating of the pipe section to be connected is substantially achieved by, for example, doubling the pipe wall and installing a heating area between the inner pipe and the outer pipe by burning oil or gas or electric heating. Heating is performed up to a region reaching the connection end. In addition, the connection ends are arranged at small intervals as long as both ends do not come into contact at a use temperature in consideration of expansion during heating.

[0006]

SUMMARY OF THE INVENTION The above-mentioned JP-A-59-80 is disclosed.
In the technique as disclosed in Japanese Patent No. 593, it is difficult to connect the high-temperature fluid conduit and the container due to a slight displacement of the connected container. In addition, problems such as thermal expansion of the connection pipe, deformation of the pipe due to contraction during cooling, and precipitation of Mg at the connection end due to flange cooling provided to prevent thermal deterioration of the packing have not been sufficiently solved. . Furthermore, the connecting pipe once used in the evaporative separation step is destroyed after being separated from the reduction evaporating chamber and the condensing chamber and is disposed of. Further, in the double-pipe structure, heating by an electric heater or the like is performed between the outer pipe and the inner pipe. At this time, there is an inconvenience that the inner pipe may be easily deformed due to a pressure difference between the inner and outer pipes or the inner and outer pipes may be easily damaged.

Further, since the inside of the inner tube is maintained at, for example, 750 ° C. or more, stress distortion occurs due to thermal expansion at the end of the steel tube. When pipe elongation occurs due to an increase in the temperature in the pipe, the pipe does not have a structure to absorb the elongation, so that pipe breakage may occur. If the pipe is broken, the pipe cannot be reused, and if it is frequently discarded, a problem of high cost arises. Even if the pipe is not damaged, the pipe is deformed due to expansion and contraction, and it is difficult to connect the pipe to the pipe at the time of re-use. In addition, oxygen and nitrogen enter the pipe due to the damage, and the quality of the product Ti is deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pipe connecting device which prevents damage to a pipe by relaxing stress deformation due to thermal expansion of the pipe and deformation of the pipe due to a pressure difference, thereby enabling reuse of the pipe many times. Is to do.

SUMMARY OF THE INVENTION An object of the present invention is to alleviate stress distortion caused by thermal expansion of a pipe and prevent the pipe from deforming, thereby facilitating the adjustment of the position and inclination of the flange connection between the pipe and the connecting pipe when the pipe is reused. To provide a conduit connecting device that is easy to install.

Another object of the present invention is to alleviate the stress distortion caused by the thermal expansion of the pipe and prevent the pipe from being deformed, thereby facilitating the installation and non-destructive removal of the connecting pipe, and further, the gasket by heat. It is an object of the present invention to provide a conduit connecting device capable of reusing a gasket many times by preventing thermal deterioration of the gasket.

It is a further object of the present invention to provide a pipe connection which can prevent oxygen and nitrogen from entering the system and can supply high quality Ti even when the pipe breaks due to the double pipe and airtight structure. It is to provide a device.

[0012]

According to a first aspect of the present invention, there is provided a conduit connecting apparatus, a conduit provided on a reaction vessel side, a conduit provided on a recovery vessel side, and a reaction vessel. In the conduit connecting device for connecting the conduit on the side and the conduit on the collection container side with a connecting pipe, the connecting pipe is configured as a double structure consisting of an inner pipe and an outer pipe, and between the inner pipe and the outer pipe. The heating section and the heat insulating section provided, a flange formed at both ends of the connection pipe, a bellows provided inside the connection pipe from the flange, and a flange connection section, the reaction vessel side and The conduit provided on the collection container side communicates with each of the containers, and at least the connection tube side is configured as a double structure including an inner tube and an outer tube, and is disposed between the inner tube and the outer tube. The heating section and the heat insulation section, and a flange formed at the connection side end of the connection pipe. Comprising di, and is solved by connecting through a gasket between the connection pipe and the conduit.

[0013] More specifically, the conduit and the outer tube of the connecting tube are formed so that a separation portion is formed and the separation portion is covered with a bellows. An elastic gasket is provided between the flange of the conduit and the flange of the connecting pipe. Water cooling jackets are provided on the flange of the conduit and the flange of the connecting pipe to cool and protect the elastic gasket. Further, the flange of the connection pipe is connected and supported by a tie rod supported by a support connected to the outer pipe, and the flange connection is formed so as to be adjustable in position. The bellows has a double structure.

Therefore, the outer pipe separating portion and the bellows absorb the stress and strain caused by the thermal expansion of the pipe, prevent the pipe from being damaged or deformed, and enable the pipe to be reused many times. Also, by relaxing stress distortion due to thermal expansion of the tube and preventing tube deformation,
At the time of reuse, the position and inclination of the flange connection between the conduit and the connecting pipe can be easily adjusted, and the connecting pipe can be easily installed. In addition, it is easy to install and remove the connecting pipe in a non-destructive manner. Further, the gasket can be reused many times by preventing the gasket from being thermally degraded due to heat. As described above, the cost can be reduced by increasing the number of reuses of the connection pipe and the gasket many times.

Further, the thermal expansion of the tube and the pressure difference between the inside and outside of the tube are alleviated, and the tube is prevented from being damaged or deformed. In order to prevent intrusion of oxygen and nitrogen from inside, it is possible to supply high quality product Ti.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic view of a conduit connecting device of a vacuum evaporative separator, and FIG. 2 is a schematic diagram of a connecting pipe of the conduit connecting device. 3 is a schematic cross-sectional view taken along line AA of the connecting pipe shown in FIG. 2, and FIG. 4 is an overall configuration diagram of the vacuum evaporation separation apparatus.

In this embodiment, a method for producing Ti by Mg reduction of TiCl ₄ in which Mg and MgCl ₂ mixed in from sponge titanium produced are separated by vacuum evaporation will be described. In addition to the use of Ti, it is needless to say that the present invention is applied to a pipe connecting device corresponding to a high-temperature fluid exhibiting a high melting point in the purification of Zr or the like.

FIG. 4 shows the overall configuration of the vacuum evaporation separation apparatus of the present invention. A cylindrical reaction vessel 52 containing sponge titanium mixed with Mg and MgCl ₂ to be evaporated, and a cylindrical recovery vessel for heating this reaction vessel to cool, condense and solidify the separated Mg and MgCl ₂ by vaporization and separation. 53 and a conduit connecting pipe device 51. The reaction vessels 52 and 53 are arranged and connected to both ends of the conduit connection device 51, and the reaction vessels 52 and 53 are juxtaposed and suspended downward.

The conduit connecting pipe 51 is composed of the conduit sections 1a and 1b and the connecting pipe 2. Upper lids 54, 55 are provided on the upper portions of both containers 52, 53, and the upper lids 54, 55 are connected to conduit portions 1a, 1b in the upward direction. By connecting the upper lids 54, 55 and the conduit portions 1a, 1b,
Both containers 52, 53 are supported. Conduits 1a, 1b
The tube extending upward is fixedly supported by a gantry, a wall, or the like installed outside the vacuum evaporator / separator in order to maintain the support of the containers 52 and 53 firmly.

Further, the conduit portions 1a and 1b are
4, 55 From the side in the middle of the pipe extending above the connection,
The pipe extends in the horizontal direction, and the connecting pipe 2 is sandwiched between the pipe sections 1a and 1b.
And the connection pipe 2 are respectively connected.

The cylindrical reaction vessel 52 is supported via an upper lid 54. An electric furnace upper seal portion provided on the upper part of the electric furnace covering the outer cylinder, and an upper cover 5
4 performs horizontal alignment, so that the cylindrical reaction vessel 52 is airtightly arranged in the heat transfer furnace. The cylindrical reaction vessel 52 is supported in a suspended shape in the electric furnace so as not to directly touch the electric heating section in the electric furnace.

Further, an injection pipe extending from the horizontal direction to the vertical and upward directions from the side of the vessel slightly above the bottom of the cylindrical reaction vessel 52 to the outside of the electric furnace is provided. This tube is used for the injection of the reactants.

The inner and outer cylinders of the cylindrical recovery container 53 are
It has the same configuration as that of the cylindrical reaction vessel 52, and an empty inner cylinder is supported by the upper lid 55. Cylindrical collection container 53
In the cooling furnace for covering the outer cylinder, the cooling furnace upper seal portion provided at the upper part and the upper lid 55 on the upper part of the container 53 are supported and arranged in the cooling furnace by performing horizontal alignment. . Cooling is performed by water cooling or the like.

Further, an injection pipe extending from the horizontal direction to the vertical and upward direction from the side of the container slightly above the bottom of the cylindrical recovery container 53 to the outside of the cooling furnace is provided. This tube is intended for use in injecting reactants,
This cylindrical container can be provided with a container on any side, such as on the side of evaporating and separating, and on the side for collecting separated substances, and further on the side of reduction reaction for performing a reduction reaction in another step. It is designed and manufactured.

Therefore, the injection pipe extending upward provided in the cylindrical recovery container 53 may not be used in the recovery step. However, in the reduction reaction step, for example, TiCl _{4 is} supplied from this injection pipe. Can be injected.

The material of the cylindrical reaction vessel 52 and the cylindrical recovery vessel 53 is stainless steel. The type of stainless steel is appropriately selected. In the evaporative separation process described here, a batch process is performed using one cylindrical container for one process, and after the process is completed, the cylindrical container is destroyed and discarded. Further, the cylindrical reaction vessel is separately manufactured on a production line.

The evaporation and separation of impurities Mg and MgCl ₂ from titanium sponge filled in the reaction vessel 52 will be described. At this time, the pressure in the apparatus system is reduced to a vacuum state of about 1.3 × 10 ⁻² Pa, and the reaction vessel is heated to a temperature of 950 ° C.

The vaporized Mg and MgCl ₂ flow in the conduit connecting device 51 as a high-temperature fluid, and are introduced into the recovery container 53. By cooling the outer surface of the recovery container 53 with water, Mg and MgCl ₂ are precipitated in the inner cylinder of the recovery container 53.

The inside of the reaction vessel 52 and the collection vessel 53 are provided with an upper lid 5.
At portions 4 and 55, they are detached and broken from the conduit portions 1a and 1b, respectively, and the substance in the container is removed. The detached conduit connecting device 51 is reused in the next step. It has been confirmed that the conventional pipe connection device can be reused up to about 30 times, but the present invention can be reused up to about 100 times.

Next, the conduit connecting device 51 will be described with reference to FIG. The conduit connection device shown in FIG.
This corresponds to one part. The conduit portions 1a and 1b and the connecting pipe 2 of both containers need to satisfy the following conditions. It has a heating means for preventing Mg and MgCl ₂ vapor from condensing and sticking in the tube, a structure capable of absorbing the thermal expansion of the tube due to heating, having a necessary strength, and an atmospheric atmosphere contaminating product Ti. And a structure capable of easily connecting to the conduit portions without being affected by the displacement of the positions of the container conduit portions 1a and 1b.

Upper lids 54, 55 at the tops of both containers 52, 53
Are connected to conduits 1a, 1b,
The connection pipe 2 is connected at a position sandwiched by 1b. The connecting pipe 2 has both ends of the conduits 1a and 1b joined together and connected, and the pipe extends in the horizontal direction. The conduits 1a, 1b and the connecting pipe 2 have a double pipe structure, and are made of stainless steel. For example, SUS316 can be used, but the type of stainless steel can be appropriately selected.

The conduit sections 1a and 1b of both vessels and the connecting pipe 2
Are respectively inner tubes 3a, 3b, 9 and outer tubes 4a, 4b,
8 is a double structure. On the inner tube side between the inner tubes 3a, 3b, 9 and the outer tubes 4a, 4b, 8, electric heaters 6a, 6
b, 11 are installed so as to cover the inner tube circumference, and further cover the end portion and the outer circumference of the electric heater.
7b and 7 are filled. Here, Mg and MgCl
₍₂₎ It is desirable to maintain the tube inner wall temperature at least 750 ° C. so that the vapor does not condense and stick in the tube. Further, by setting the internal temperature of the outer tubes 4a, 4b, 8 to 300 ° C. or less, the strength of the conduit portions 1a, 1b, 2 is secured by the outer tubes.

The outer tube is formed separately on the near side and the rear side as shown in FIG. 2, and the inner tube is provided so as to penetrate the inside. In addition, there is one vacuum port 60 for depressurizing the conduit connecting device together with the reaction system, four electric heater lead ports 59 for controlling the temperature of the inner tube, and two temperature measuring ports 61 for measuring the temperature of the inner tube. Location, each is attached to the outer tube wall and joined by means such as welding. In addition, the vacuum port 60
In order to perform air cooling, fins 60a are provided around the vacuum port 60 in a fin shape.

As shown in FIG. 3, the heater lead ports are installed at four symmetrical positions in the cross section of the pipe, and as shown in FIG. 2, at four symmetrical positions with respect to the center of the pipe length in the pipe length direction. . In other words, four pairs of the electric heater and the heat insulating material 12 covering the electric heater are provided in the outer tube in the right front, the left front, the right rear, and the left rear in FIG. As shown in FIG. 3, the temperature measuring ports 61 are installed at two positions symmetrical in the horizontal direction, that is, at the front side and the rear side as shown in FIG.

Here, the inside of the double tube is depressurized similarly to the inside of the reaction system, thereby preventing the high temperature inner tube from being deformed due to the pressure difference between the inside and outside of the tube. Furthermore, since Ti is a very active metal, it is easily oxidized and nitrided, and when the air atmosphere leaks into the pipe due to pipe damage, the product Ti
Has an airtight structure so that oxygen and nitrogen contaminating the gas do not enter the reaction system. The inside of the inner pipe has an airtight structure by sandwiching and sealing a gasket in a gap between the connecting portion of the conduit and the connecting pipe.

Next, the connecting pipe 2 will be described with reference to FIG. 2 showing a schematic view of the connecting pipe in the conduit connecting apparatus and FIG. 3 showing a schematic sectional view taken along the line AA of the connecting pipe shown in FIG.

[0038] Flanges 13a and 14a are provided at the connecting portions at the ends of the conduit 1a and the connecting pipe 2.
The connecting pipe 2 is provided with a bellows 15 having a double structure in a cylindrical shape so as to cover the outer circumference of the outer pipe 8 at a connecting portion at both ends. The material of the bellows 15 is stainless steel, and its type is appropriately selected.

Here, the bellows and the flange in the connecting portion will be described in detail. Donut disk-shaped flanges 14a are provided at both ends of the connection pipe 2 perpendicular to the pipe direction. The flange 14a has a cylindrical shape that covers the bellows end of the bellows 15 and the outer tube circumference.
They are joined by a bellows joint 57. This joining is performed by a method such as welding. The inner periphery of the donut disk-shaped flange 14a is not in contact with the outer tube peripheral wall.

On the other hand, the other side of the bellows 15 which is not the flange connecting portion side, that is, the other end side is connected to a donut disk-shaped support plate 58 which is vertically in contact with the outer tube wall. Are provided with three tie rod 19 support portions. Furthermore, also on the outer periphery of the flange 14a,
Three tie rod 19 support portions are provided at equal intervals. Further, the bellows 15 has a double structure, and is prepared in case of bellows breakage. Thus, the flange 14a
The bellows 15 is installed in such a manner that the bellows 15 is sandwiched between the support tube 58 and a donut disk-shaped support plate 58 in contact with the outer tube wall.

Further, the gaskets 23 and 24 are arranged concentrically on the surface of the flange 14a, doubly arranged so that the gasket 23 is on the outside and the gasket 24 is on the inside. Further, a tie rod 19 provided on the outer peripheral portion of the flange 14a
The support portion and the tie rod 19 support portion provided on the donut disk-shaped support plate contacting the outer tube wall allow the tie rod 19 to penetrate in a direction substantially parallel to the tube direction, and the donut disk-shaped support plate side contacting the outer tube wall. The tie rod is fixed by bolting, and then the pipe position, horizontal position, and the like due to the expansion and contraction of the bellows are adjusted by the bolting condition of the tie rod on the flange connection portion side.
It is crimped and connected to the flange 13a via 3, 24.

The bellows 1 is mounted on the flange 14a.
In order to protect the gasket from high heat, a water-cooled jacket is installed in a donut disk shape with a gasket width inside the flange provided with 5. Flange 13a
Similarly, a water-cooled jacket having a donut disk shape and a gasket width is provided on the flange 13a on the side other than the connection surface side.

As described above, the flange 14a is airtightly connected to the flange 13a of both the vessel conduit portions 1a by the bolts at the flange connection portions through which the tie rods pass through the rubber gaskets 23 and 24. Here, bellows 1
Numeral 5 is for adjusting the difference in the position and inclination of the flanges 14a and 13a.

The flange 14b on the other end of the connection pipe
And the flange 13b on the side of the conduit connected thereto has the same structure as that described above, and is connected, so description thereof will be omitted.

Further, since the inner tubes 3a, 3b, 9 are heated to 750 ° C. and the outer tubes 4a, 4b, 8 are kept at 300 ° C. or less, a difference in the thermal expansion of the tubes occurs. If the conduit portion has a rigid structure, stress due to a difference in thermal expansion is concentrated on the end portion, and the endurance of the tube is deteriorated due to deformation of the end portion. Accordingly, in the present invention, the outer pipes are provided with outer pipe bellows 5a, 5b, 10b so that the outer pipe expands and contracts in accordance with the thermal expansion of the inner pipe.
Is provided. Inside the bellows 5a, 5b, 10, an outer tube separating portion 56 is provided with a width of about 30 mm along the outer periphery of the outer tube so as not to hinder the expansion and contraction of the outer tube so as to cover the opening area of the separating portion. Is provided with a cylindrical tube 59 in contact with the inside of the outer tube. The provision of the cylindrical tube 59 prevents the air atmosphere from directly entering the outer tube. Even when the separating portion 56 expands and spreads, the margin of the width of the cylindrical tube 59 has a margin to prevent the air atmosphere from entering. Outer tube bellows 5a, 5b, 10 are provided in a donut shape on the outer tube outer periphery so as to cover the outside of the separating portion. Due to the thermal expansion of the outer tube, the separation portion expands, and the outer tube bellows 5a, 5b, 10 absorbs the expansion of the tube resulting from the expansion. The outer tube bellows is made of stainless steel, and the type is appropriately selected.

Further, in order not to hinder the thermal expansion of the inner tube,
At the position where the end portion 22 of the connection tube 2 does not contact the flange 13a when connecting the connection tube 2, that is, at a position where the flange 14a is about 1 cm ahead of the connection tube 2 end portion 22, that is, at a position that is closer to the flange 13a side of the conduit connection portion. The position is adjusted by the tie rod 19. At this time, the flange 14a is not in contact with the outer tube, has a slight gap between the outer tube and the bellows 15, entering the Mg and MgCl ₂ vapors bellows portion gap 18, coagulation, to prevent sticking, A glass fiber heat insulating gasket 17 having elasticity is mounted in a donut disk shape and sandwiched in a slight gap between the connecting portion of the conduit and the connecting pipe to maintain airtightness.

After the connection between the conduit and the connecting pipe, the expansion of the outer pipe resulting from the thermal expansion of the inner pipe exposed to high temperature is absorbed by the bellows 15. Further, by an air cylinder 16 installed on a stand or the like installed outside the vacuum evaporation separation apparatus,
By supporting a part of the lower part of the connecting pipe 2, the weight of the connecting pipe 2 is supported, the bolt 20 and the nut of the tie rod 19 are sufficiently loosened, and the bellows 15 absorbs the expansion of the outer pipe accompanying the thermal expansion of the inner pipe. Let it.

Further, since the bellows of the bellows 15 have a double structure that expands and contracts in the pipe direction and covers the circumference of the outer pipe, in addition to the function of efficiently absorbing the elongation of the pipe, the inner bellows existing on the outer pipe side may be In the case where the bellows is broken due to stress strain or the like, the other bellows are present outside, so that the airtight structure is maintained. From the support plate 58 side for connecting and supporting the outer tube and the bellows,
A bellows internal pressure gauge 62 is inserted and connected between the bellows of the bellows having a double structure, and when the bellows is broken, the pressure gauge detects a pressure difference and can detect the bellows broken.

On the other hand, condensed and condensed substances of Mg and MgCl ₂ are observed in the vicinity of the glass fiber insulating gasket 17 where the heating from the heater is cut off, but this does not hinder the separation operation. Therefore, the problem of tube clogging does not occur.

In the apparatus of the present embodiment, in order to maintain the airtightness of the conduit connecting device, the parts are joined together by welding means or packing rings and O-rings at the places where bolts and nuts are to be tightened. Is used.

As described above, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is determined only by the matters specifying the invention according to the claims that are appropriate from the above description.

[0052]

As described above, according to the conduit connecting apparatus of the present invention, the bellows and the outer pipe separating portion absorb the thermal expansion of the pipe, prevent stress distortion due to the thermal expansion, and prevent deformation and breakage of the pipe. It becomes possible.

Therefore, by preventing the tube from being deformed, it becomes easy to reconnect the tube when it is reused. Further, in the connection between the reaction vessel and the collection vessel, the positions and inclinations of the conduit and the connection pipe can be adjusted, and the connection between the reaction vessel and the collection vessel becomes easy.

Further, according to the present invention, by preventing breakage and deformation caused by thermal expansion of the pipe due to heating, it is easy to install and remove the connecting pipe in a non-destructive manner, and further to prevent thermal deterioration of the gasket. By doing so, it is possible to increase the number of times the gasket is reused many times.

As described above, according to the conduit connecting device of the present invention, it is possible to dramatically increase the number of reuses of the connecting pipe.

Further, according to the present invention, by maintaining the double structure and the airtight connection, even in the case of breakage,
It is possible to prevent contamination of the metal in the reaction system by oxygen and nitrogen and to provide a high quality metal product.

[Brief description of the drawings]

FIG. 1 is a schematic view of a conduit connection device of a vacuum evaporation separation device.

FIG. 2 is a schematic view of a connecting pipe of the conduit connecting device.

FIG. 3 is a schematic cross-sectional view taken along line AA of the connecting pipe shown in FIG. 2;

FIG. 4 is an overall configuration diagram of a vacuum evaporation separation apparatus.

[Explanation of symbols]

 1a High-temperature fluid conduit 1b High-temperature fluid conduit 2 Connecting pipe 3a Inner pipe 3b Inner pipe 4a Outer pipe 4b Outer pipe 5a Outer pipe bellows 5b Outer pipe bellows 6a Heater 6b Heater 7a Insulating material 7b Heat insulator 8 Outer pipe 9 Inner pipe 10 Outer pipe Bellows 11 Heater 12 Insulation material 13a Flange 13b Flange 14a Flange 14b Flange 15 Bellows 16 Air cylinder 17 Glass fiber insulation gasket 18 Bellows space 19 Tie rod 20 Bolt 21 Water cooling jacket 22 Connection pipe end 23 Rubber gasket 24 Rubber gasket 51 Pipe connection Apparatus 52 Cylindrical reaction vessel 53 Cylindrical recovery vessel 54 Upper lid 55 Upper lid 56 Outer pipe separating part 57 Flange-bellows joint part 58 Support board 59 Cylindrical pipe 60 Vacuum suction port 60a Radiator fin 61 Temperature measuring port 62 Inside bellows Power meter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F16L 59/04 F16L 59/04 F-term (Reference) 3H025 AA13 AB01 AB05 3H036 AA01 AB12 AC06 AD09 AE07 3H104 JA08 JB02 JC01 JC04 JD09 KA01 KB13 LB05 LB38 LG03 LG30 MA05 MA06 3H111 AA01 BA03 CA16 CB27 CB28 DA15 DA23 DB01 DB27 4K001 AA27 AA31 DA11 EA01 EA05 GA08 GA15 GA19 GB02 GB12 HA02

Claims (6)

[Claims] 1. A conduit connecting device for connecting a conduit provided on a reaction container side, a conduit provided on a recovery container side, a conduit on a reaction container side and a conduit on a recovery container side with a connecting pipe, wherein the connection The pipe is configured as a double structure consisting of an inner pipe and an outer pipe, a heating section and a heat insulating section disposed between the inner pipe and the outer pipe, and flanges formed on both ends of the connection pipe, A bellows disposed on the inner side of the connection pipe from the flange, and a flange connection portion, wherein the conduits provided on the reaction vessel side and the recovery vessel side communicate with the respective vessels, and at least the connection pipe side A heating unit and a heat insulating unit, which are configured as a double structure including an inner tube and an outer tube, are disposed between the inner tube and the outer tube, and a flange formed at a connection side end of the connection tube. That is connected via a gasket between the conduit and the connecting pipe. Conduit connection apparatus according to claim. 2. The conduit connection device according to claim 1, wherein a separation portion is formed between the conduit and an outer tube of the connection tube, and the separation portion is formed by covering the separation portion with a bellows. 3. The conduit connecting device according to claim 1, wherein an elastic gasket is disposed between the flange of the conduit and the flange of the connecting pipe. 4. The conduit according to claim 3, wherein a water cooling jacket is provided on the flange of the conduit and the flange of the connecting tube for cooling and protecting the elastic gasket. Connection device. 5. The connecting pipe according to claim 1, wherein the flange is connected to a tie rod supported by a supporting part connected to the outer pipe, and the flange connecting part is formed to be adjustable in position. Item 2. The conduit connecting device according to Item 1. 6. The conduit connecting device according to claim 1, wherein the bellows has a double structure.