JP2011252571A - Double-pipe connection structure for storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-pipe connection structure for a storage container that achieves simplification of assembly and disassembly of a double-pipe connection structure while simplifying the structure by eliminating a short pipe.SOLUTION: An inner pipe 2 is divided on the same plane as the flange surface of a storage container 1 or near it. A body-side inner-pipe flange 22 is formed at the end of the inner pipe arranged closer to the container inside than the divided end surface. A circumscribed-side inner-pipe flange 21 is formed at the end of the inner pipe, arranged on the container outside, oppositely to the body-side inner-pipe flange 22. An outer-pipe flange 31 is formed at the end of an outer pipe arranged on the container outside so as to be fastenable to the flange surface of the storage container. When the outer-pipe flange 31 is fastened to the flange surface of the storage container 1, the outer-pipe flange 31, the body-side inner-pipe flange 22, and the circumscribed-side inner-pipe flange 21 are joined together by fastening the three flanges together by a bolt fastening force so as to allow an inner-pipe passage 5 to fluid-tightly communicate with an outer-pipe passage 6.

Description

  The present invention is applied to a storage container, a casing of a prime mover, and the like, and is formed in the storage container through an inner tube having an inner tube passage formed inside and a cylindrical outer tube passage outside the inner tube. The present invention relates to a double pipe connection structure of a storage container in which a double pipe is connected to an outer pipe.

In FIG. 5, a double pipe consisting of an inner pipe having an inner pipe passage formed therein and an outer pipe formed outside the inner pipe through a cylindrical outer pipe passage is connected to the storage container. It is sectional drawing which follows the piping axis center which shows one conventional example of the double piping connection structure of a storage container.
In FIG. 5, the connection port 1 b of the cylindrical or spherical storage container 1 has an inner tube 2 in which an inner tube passage 5 is formed inside, and a cylindrical outer tube passage 6 outside the inner tube 2. It has a double pipe connection structure with the outer tube 3 formed in this way. A cylindrical short tube 50 having substantially the same diameter as the outer tube 3 is inserted outside the inner tube 2 between the storage container side portion of the outer tube 3 and the connection port 1b.

In the short pipe 50, a flange 50a on the outer side of the storage container of the short pipe 50 is connected to a flange 3c of the outer pipe 3 with a bolt 50b, and a flange 50c on the storage container side is connected to the connection port 1b with a bolt 4.
On the other hand, the connecting portion of the inner pipe 2 is arranged outside the storage container by L from the flange 50a portion of the short pipe 50, and the flange 51s of the connecting portion connects the two flanges with bolts 52. is doing.

  In addition, as an example of a double pipe connection structure of an inner pipe having an inner pipe passage formed therein and an outer pipe formed outside the inner pipe through a cylindrical outer pipe passage, Patent Literature 1 (Japanese Utility Model Laid-Open No. 4-32388), Patent Document 2 (Japanese Patent Publication No. 4-76876), and the like.

Japanese Utility Model Publication No. 4-32388 Japanese Patent Publication No. 4-76876

  In the example shown in FIG. 5, the connection port 1 b of the storage container 1 has a double pipe connection structure of an inner tube 2 and an outer tube 3 formed outside the inner tube 2. A cylindrical short tube 50 having substantially the same diameter as the outer tube 3 is inserted on the outer side of the inner tube 2 between the storage container side portion of the outer tube 3 and the connection port 1b.

  That is, the short pipe 50 is removably inserted, and the inner pipe 2 has a flange 51s of the connection portion disposed at a portion outside the storage container by L with respect to the flange 50a portion of the short pipe 50, and the connection portion. Since the two flanges 51s are connected by bolts 52, the flange 51s can be connected and released by inserting the short pipe 50 in a removable manner.

For this reason, the short pipe 50 is required, the number of parts is increased, and since the flange 51s of another system is provided inside the short pipe 50, the inner diameter D is increased and the double pipe structure is enlarged.
In addition, since the short pipe 50 is assembled by the flange 50a and the flange 50c, and the inner pipe 2 is assembled by the flange 51s of the connecting portion, it is necessary to assemble twice, so many man-hours are required for assembling and disassembling the double pipe. Need.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a double pipe connection structure for a storage container in which a short pipe is not required and the structure is simplified and the assembly and disassembly of the double pipe are simplified.

The present invention achieves such an object, and includes an inner tube having an inner tube passage formed therein and an outer tube formed outside the inner tube through a cylindrical outer tube passage. In the double pipe connection structure of the storage container to which the double pipe is connected,
An end surface of the inner tube is formed on the same surface as or near the flange surface of the storage container, and a main body-side inner tube flange portion is formed at an end portion of the inner tube disposed on the container side with respect to the end surface. An outer side inner pipe flange portion is formed at an end portion of the inner pipe disposed on the outer side so as to face the main body side inner pipe flange portion, and a flange surface of the storage container is disposed on the outer pipe end portion disposed on the outer side of the container. When the outer pipe flange portion is tightened to the flange surface of the storage container, the outer pipe flange portion, the main body side inner pipe flange portion, and the It is characterized in that the inner pipe flange portion is joined to the outer pipe side by tightening together, and the inner pipe passage is fluidly connected to the outer pipe passage.

  In the present invention, preferably, the end portions of the circumscribed inner tube flange portion and the outer tube flange portion are welded to each other, and the circumscribed inner tube flange portion and the outer tube flange portion are uniform with the welded portion. When the outer tube flange portion is tightened to the flange surface of the storage container, the uniform finished surface is pressed against the end surface of the main body side inner tube flange portion by a bolt tightening force.

According to the present invention, a double pipe comprising an inner pipe having an inner pipe passage formed therein and an outer pipe formed outside the inner pipe via a cylindrical outer pipe passage is provided in the storage container. In the double pipe connection structure of the connected storage container, the end surface of the inner tube is formed on the same surface as or near the flange surface of the storage container, and the end portion of the inner tube disposed on the container side of the end surface A main body side inner pipe flange portion is formed on the outer side of the container, and an outer side inner pipe flange portion is formed at the end of the inner pipe disposed on the outer side of the container so as to face the main body side inner pipe flange portion. An outer tube flange portion is formed at the outer tube end portion so as to be fastened to the flange surface of the storage container, and when the outer tube flange portion is tightened to the flange surface of the storage container, the outer tube is tightened by a tightening force of a bolt. Flange part, main body side inner pipe flange part and circumscribed side inner pipe flange part Configured to allow communication with the fluid-tight relative to the outer tube passageway said inner tube passageway by bonding at 3 Monodomo tightened.
That is, according to the present invention, the end surface of the inner tube is formed on the same surface as the flange surface of the storage container or in the vicinity thereof, and the inner side of the inner tube is disposed at the end of the inner tube disposed on the container side of the end surface. A pipe flange portion is formed, and an outer side inner pipe flange portion is formed at an end portion of the inner pipe disposed outside the container so as to face the main body side inner pipe flange portion, and the outer side inner pipe flange portion and the main body side are formed. Since the three flange parts of the inner pipe flange part and the outer pipe flange part are fastened together, it is fastened to the flange surface of the storage container by the bolt tightening force.
The three flange portions can be fastened together by only tightening the bolts on the outer tube flange portion, thereby eliminating the need for a detachable short pipe as in the prior art. As a result, the number of parts is reduced, and it is not necessary to provide a separate flange inside the short pipe, the inner diameter of the inner pipe is reduced, and the connection structure of the double pipe is made compact and compact.

In addition, the three flange parts of the outer side inner pipe flange part, the main body side inner pipe flange part and the outer pipe flange part can be fastened together by only tightening the bolts of the outer pipe flange part. It becomes extremely easy. As a result, the number of assembly steps can be greatly reduced.
In addition, since the joint between the outer pipe-side inner pipe flange part of the inner pipe and the main body-side inner pipe flange part is integrally formed on the flange surface of the storage container, there is no need to provide a separate flange part inside the outer pipe, Apparently, the outer side inner pipe flange part, the main body side inner pipe flange part, and the flange surface of the storage container are integrally formed, the inner diameter of the inner pipe is not increased, and the size is reduced.

Also, the end portions of the outer side inner pipe flange portion and the outer pipe flange portion are welded to each other, and the outer side inner pipe flange portion and the outer pipe flange portion are finished to a uniform surface together with the welded portion. When the portion is tightened to the flange surface of the storage container, the finish surface of the uniform surface is configured to be pressed against the end surface of the main body side inner tube flange portion by the tightening force of the bolt.
The outer side inner pipe flange part and the outer pipe flange part are finished to be a uniform surface together with the welded part, and the uniform side is press-contacted to the end surface of the main body side inner pipe flange part and the flange surface of the storage container. The pipe flange part and the outer pipe flange part can be fixed to the main body side inner pipe flange part and the upper flange surface of the storage container, and a uniform inner pipe connection structure with little leakage is obtained.

It is the double piping connection structure of the storage container concerning the Example of this invention, Comprising: (A) is sectional drawing orthogonal to the axial center of a storage container, (B) is an AA arrow line view of (A). . It is the Z section enlarged view of Drawing 1 (A) concerning the example of the present invention. It is the Y section enlarged view of FIG. 2 concerning the Example of this invention. It is the X section enlarged view of FIG. 2 concerning the Example of this invention. It is sectional drawing which follows the piping axis center which shows one conventional example of the double piping connection structure of a storage container.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

  FIG. 1 shows a double pipe connection structure of a storage container according to an embodiment of the present invention, in which (A) is a cross-sectional view perpendicular to the axis of the storage container, and (B) is an AA arrow in (A). FIG. 2 is an enlarged view of a Z portion in FIG. 1A, FIG. 3 is an enlarged view of a Y portion in FIG. 2, and FIG. 4 is an enlarged view of an X portion in FIG.

In FIGS. 1 to 4, an inner tube 2 having an inner tube passage 5 formed therein and a cylindrical outer tube passage 6 outside the inner tube 2 are formed in the connection port 1 b of the cylindrical or spherical storage container 1. It has a double pipe connection structure provided with an outer pipe 3 formed through the.
For example, a hot gas is allowed to pass through the inner pipe passage 5 of the inner pipe 2, and a gas having a temperature lower than that of the inner pipe passage 5 is supplied to the outer pipe passage 6 as a cooling gas for the inner pipe passage 5. The inner pipe 2 is cooled by flowing. It is also possible to wind a heat insulating material around the outer periphery of the outer tube 3.
The fluid passing through the inner pipe passage 5 and the outer pipe passage 6 is not limited to the gas but may be any gas or liquid. The center of the inner tube 2 and the outer tube 3 is indicated by 10.

As shown in FIG. 2, the inner tube 2 has an end face of the split portion on the same surface as the storage container upper flange surface 1 a of the connection port 1 b of the storage container 1 (or may be slightly inside the storage container). (2s is the end face).
Then, a main body side inner tube flange 22 is formed in the inner tube 2 inside the storage container relative to the end surface 2s, and the outer surface 22c (see FIG. 4) of the main body side inner tube flange 22 is used as the storage container upper flange surface. It corresponds to 1a.
Moreover, as shown in FIG. 4, the inner side of the storage container of the main body side inner pipe flange 22 is welded to the inner pipe 2 (22b is a welded portion).

That is, as shown in FIG. 4, the upper collar portion 22a of the main body side inner tube flange 22 is fitted into the groove 1t of the storage container 1, and a thin gasket 12 is formed on the upper and lower surfaces of the upper collar portion 22a. And 13 are inserted.
As will be described later, the thickness of the upper collar portion 22a after inserting the gaskets 12 and 13 protrudes slightly above the storage container upper flange surface 1a when the uniform surface 21u is pressed, The fastening margin of the collar portion 22a is held.

On the other hand, as shown in FIG. 2, the main body side inner tube flange is connected to the inner tube 2 outside the container from the end surface 2s formed on the same surface as the container upper flange surface 1a of the connection port 1b of the container 1. A circumscribed inner pipe flange 21 is formed so as to face 22. The circumscribed inner pipe flange 21 is welded to the inner pipe 2 by a welded portion 2p.
Further, as described above, the outer tube 3 is provided by forming the cylindrical outer tube passage 6 outside the inner tube 2, and the storage container is provided on the side of the storage container. An outer tube flange 31 is formed on the upper flange surface 1a of one storage container so as to be fastened, and an outer side of the storage container of the outer tube flange 31 is welded to the outer tube 3 by a welding portion 31c.
As shown in FIG. 3, a plurality of passage holes 11 are formed in the circumscribed inner pipe flange 21.

Then, as shown in FIG. 3, after welding the storage container inner end surface of the circumscribed inner tube flange 21 and the storage container side end surface of the outer tube flange 31 (7 is a welded portion), the weld surface is S Only the dimension is scraped off to finish the uniform surface 21u.
Thereafter, the outer pipe flange 31 is fastened to the storage container upper flange surface 1a by fastening a plurality of bolts 4. At this time, as shown in FIG. 4, the thickness of the upper collar portion 22a of the main body side inner tube flange 22 after the gaskets 12 and 13 are inserted projects slightly above the storage container upper flange surface 1a. Therefore, by tightening the bolt 4, the uniform surface 21 u can be joined to the upper surface of the upper collar portion 22 a together with the outer tube flange 31, thereby connecting the inner tube passage 5 to the outer tube passage 6. It can be set as the structure made to fluid-tightly communicate with respect to.

That is, in manufacturing the double pipe connection structure of the storage container, the following order is used.
The inner tube 2 is divided into the same surface as the upper flange surface 1a of the storage container 1 or slightly inside the storage container to form an end surface. A pipe flange 22 is formed, and the outer surface 22c of the main body side inner pipe flange 22 is arranged on the same plane as the upper flange surface 1a.
Next, an outer side inner pipe flange 21 is formed in the inner pipe 2 outside the storage container with respect to the upper flange surface 1 a so as to face the main body side inner pipe flange 22, and the lower side of the outer pipe 3 is the storage container 1. An outer tube flange 31 that can be fastened to the upper flange surface 1a is formed.

Next, the inner sides of the container of the circumscribed inner pipe flange 21 and the outer pipe flange 31 are welded to finish the welded surface into a uniform surface 21u.
Further, when the outer pipe flange 31 is fastened to the upper flange surface 1 a of the storage container 1 with the bolt 4, the finished surface of the uniform surface 21 u and the upper collar portion of the main body side inner pipe flange 22 are tightened by the tightening force of the bolt 4. The outer pipe 22c is joined to the outer pipe 22a together to make the inner pipe passage 5 communicate with the outer pipe passage 6 in a fluid-tight manner up and down.

  Therefore, according to this embodiment, the inner tube 2 is divided in the vicinity of the upper flange surface 1a to form an end surface, and the main body side inner tube flange 22 is formed in the inner tube 2 inside the storage container relative to the end surface 2s. The inner pipe 2 outside the storage container forms a circumscribed inner pipe flange 21 so as to face the main body side inner pipe flange 22, the outer circumscribed inner pipe flange 21 and the main body side inner pipe flange 22 are combined, and the outer pipe The three flanges 21, 22, 31 together with the flange 31 are fastened to the upper flange surface 1 a of the storage container 1 by the tightening force of the bolt 4, so that the outer side inner pipe flange 21 and the main body side inner pipe flange 22 are fastened. Are tightened together with the tightening force of the bolt 4 of the outer pipe flange 31, and the three flanges 21, 22, 31 can be fastened together with only the tightening force of the bolt 4 of the outer pipe flange 31. This Detachable short pipe as in the prior art becomes unnecessary by. As a result, the number of parts is reduced, and it is not necessary to provide a separate flange inside the short pipe, the inner diameter of the inner pipe 2 is reduced, and the double pipe connection structure becomes compact and compact.

Further, the three flanges 21, 22, 31 of the outer side inner pipe flange 21, the main body side inner pipe flange 22 and the outer pipe flange 31 are fastened together by only tightening force of the bolt 4 of the outer pipe flange 31. This makes it very easy to assemble. As a result, the number of assembly steps can be greatly reduced.
Further, since the joint portion between the outer side inner pipe flange 21 and the main body side inner pipe flange 22 of the inner pipe 2 is formed integrally with the upper flange surface 1a of the storage container 1, a flange of a different system is provided inside the outer pipe 3. There is no need, and the outer side inner pipe flange 21, the main body side inner pipe flange 22, and the upper flange surface 1 a of the storage container 1 are formed integrally, and the inner diameter of the inner pipe 2 does not increase, Moreover, it becomes small and compact.

In addition, the outer side inner pipe flange 21 is welded to the inner side of the container of the outer pipe flange 31, and the outer side inner pipe flange 21 and the outer pipe flange 31 are finished together with the welded portion to a uniform surface 21u. When the outer tube flange 31 is tightened to the upper flange surface 1 a of the storage container 1, the finished surface of the uniform surface 21 u is pressed against the outer surface 22 c (see FIG. 4) of the main body side inner tube flange 22 by the tightening force of the bolt 4. Because it was configured as
The outer side inner pipe flange 21 and the outer pipe flange 31 are finished to a uniform surface 21u together with the welded portion, and the uniform surface 21u is pressed to the outer side surface 22c of the main body side inner pipe flange 22 and the upper flange surface 1a of the storage container 1. By doing so, it is possible to obtain a connection structure of the inner pipe 2 that can be fixed to the main body side inner pipe flange 22 and the upper flange surface 1a of the storage container 1 and that is less leaky.

  According to the present invention, it is possible to provide a double pipe connection structure for a storage container in which a short pipe is not required, the structure is simplified, and the assembly and disassembly of the double pipe connection structure is simplified.

DESCRIPTION OF SYMBOLS 1 Storage container 1a Storage container upper flange surface 1b Connection port 2 Inner pipe 2s End surface 2p Welding part 3 Outer pipe 4 Bolt 5 Inner pipe path 6 Outer pipe path 7 Welded part 12, 13 Gasket 21 Outer side inner pipe flange 21u Uniform surface 22a Upper collar portion 22c Outer side surface 22 Main body side inner pipe flange 22b Welded portion 31 Outer tube flange 31c Welded portion

Claims (2)

2 of a storage container in which a double pipe is connected to a storage container, an inner pipe having an inner pipe passage formed therein and an outer pipe formed outside the inner pipe through a cylindrical outer pipe passage. In heavy pipe connection structure,
An end surface of the inner tube is formed on the same surface as or near the flange surface of the storage container, and a main body-side inner tube flange portion is formed at an end portion of the inner tube disposed on the container side with respect to the end surface. An outer side inner pipe flange portion is formed at an end portion of the inner pipe disposed on the outer side so as to face the main body side inner pipe flange portion, and a flange surface of the storage container is disposed on the outer pipe end portion disposed on the outer side of the container. When the outer pipe flange portion is tightened to the flange surface of the storage container, the outer pipe flange portion, the main body side inner pipe flange portion, and the A double pipe connection structure for a storage container, wherein the inner pipe flange portion is joined to the outer pipe side by joint tightening so that the inner pipe passage is fluid-tightly connected to the outer pipe passage. .   The ends of the outer pipe side flange portion and the outer pipe flange portion are welded to each other, and the outer side inner pipe flange portion and the outer pipe flange portion are finished to a uniform surface together with the weld portion, and the outer pipe flange portion is formed. 2. The storage container according to claim 1, wherein when tightening to the flange surface of the storage container, the finished surface of the uniform surface is pressed against the end surface of the main body side inner pipe flange portion by a tightening force of a bolt. Heavy piping connection structure.

Images