CN214666309U

CN214666309U - Sleeve pipe head connecting structure of sleeve pipe type heat exchanger

Info

Publication number: CN214666309U
Application number: CN202120557508.7U
Authority: CN
Inventors: 刘兵
Original assignee: Shandong Meiling Bode Chemical Machinery Co ltd
Current assignee: Shandong Meiling Bode Chemical Machinery Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-11-09
Anticipated expiration: 2031-03-18

Abstract

The utility model belongs to the technical field of the heat exchanger, a bushing head connection structure of bushing type heat exchanger is related to. The structure comprises an inner pipe, an outer pipe, a sealing ring, a connecting elbow, a flange and a flange cover, wherein the end part of the outer pipe is sealed with the end surface of the flange; the outer side of the inner pipe in the pressure cavity is sleeved with a Y-shaped rubber ring, the Y-shaped rubber ring is filled in an annular groove formed by the flange, the sealing ring and the inner pipe, and a surface groove of the Y-shaped rubber ring faces the connecting elbow; a pressing pipe with a hollow surface is arranged between the Y-shaped rubber ring and the flange cover, and the inner wall of the pressing pipe is provided with a ring of annular limiting ring which is abutted against the end part of the inner pipe; the left end of the pressing pipe is matched with a surface groove of the Y-shaped rubber ring, and the right end of the pressing pipe is connected with the flange cover. The convenience degree of the inner pipe disassembly and replacement is improved.

Description

Sleeve pipe head connecting structure of sleeve pipe type heat exchanger

Technical Field

The utility model belongs to the technical field of the heat exchanger, a bushing head connection structure of bushing type heat exchanger is related to.

Background

The double-pipe heat exchanger is a concentric sleeve formed by connecting two standard pipes with different sizes, wherein the outside is called a shell side, and the inside is called a pipe side. The two different media can flow in the shell side and the tube side in the opposite directions (or in the same direction) to achieve the effect of heat exchange. The tube and the shell pass are connected by a welding structure in the conventional design, such as the technical scheme of the Chinese patent CN 201922479975.8. When the inner pipe of the pipe pass leaks, only the whole equipment can be replaced, and the inner pipe cannot be replaced and overhauled independently.

Chinese patent CN201621183339.0 discloses a pipe joint connection structure, which uses a connection ring as an intermediate medium to connect a flange, an inner pipe and an outer pipe, so as to enhance the strength of the connection structure, but is still not beneficial to the disassembly of the pipe and the shell pass.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double-pipe tube head connection structure of double-pipe heat exchanger under the prerequisite that does not influence the heat exchange tube leakproofness, has improved the convenient degree that the inner tube was dismantled and is changed.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a sleeve pipe head connection structure of sleeve pipe heat exchanger, including inner tube, outer tube, sealing ring, connecting elbow, flange and blind flange, the outer tube tip and the sealed welding of flange terminal surface, the inner tube passes through the sealing ring suit at the flange inner circle, and connecting elbow tip and blind flange inner circle sealing connection, flange and blind flange can dismantle the connection, constitute the pressure chamber between flange and the blind flange, the left end and the inner tube intercommunication of pressure chamber, the right-hand member and connecting elbow intercommunication; the outer side of the inner pipe in the pressure cavity is sleeved with a Y-shaped rubber ring, the Y-shaped rubber ring is filled in an annular groove formed by the flange, the sealing ring and the inner pipe, and a surface groove of the Y-shaped rubber ring faces the connecting elbow; a pressing pipe with a hollow surface is arranged between the Y-shaped rubber ring and the flange cover, and the inner wall of the pressing pipe is provided with a ring of annular limiting ring which is abutted against the end part of the inner pipe; the left end of the pressing pipe is matched with a surface groove of the Y-shaped rubber ring, and the right end of the pressing pipe is connected with the flange cover.

Further, a sealing gasket is arranged between the flange and the flange cover.

Furthermore, the end part of the connecting elbow is welded with the inner ring of the flange cover, and the end part of the pressing pipe is welded on the end face of the flange cover.

Further, the compression pipe and the limiting ring are integrally formed or are welded in an assembly mode.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model discloses a be applicable to when the tube side pressure is higher than shell side pressure, under the condition that the tube side was stepped up earlier, utilize Y type rubber circle self sealss characteristic, form pipe, shell side seal structure. The structure is simple to install, the inner pipe is convenient to disassemble and replace when leakage occurs, and the sealing effect is good.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 is a schematic structural view of a double pipe heat exchanger according to the present invention;

fig. 2 is a schematic structural view of a casing head connection structure of the double pipe heat exchanger of the present invention;

the respective symbols in the figure are as follows: 1 inner tube, 2 outer tubes, 3 sealing rings, 4Y-shaped rubber rings, 5 flanges, 6 compression tubes, 7 spacing rings, 8 sealing gaskets, 9 flange covers, 10 studs, 11 nuts and 12 connecting elbows.

Detailed Description

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The present invention will be further described with reference to fig. 1 and 2.

The utility model discloses a bushing heat exchanger's bushing head connection structure, including inner tube 1, outer tube 2, sealing ring 3, connecting bend 12, flange 5 and flange lid 9. The end part of the outer pipe is hermetically welded with the end surface of the flange, and the inner pipe is sleeved on the inner ring of the flange through a sealing ring. The end part of the connecting elbow is hermetically welded with the inner ring of the flange cover. The flange and the flange cover are detachably connected through a stud 10 and a nut 11, and a sealing gasket 8 is arranged between the flange and the flange cover.

And a pressure cavity is formed between the flange and the flange cover, the left end of the pressure cavity is communicated with the inner pipe, and the right end of the pressure cavity is communicated with the connecting elbow. The outer side of the inner tube in the pressure cavity is sleeved with a Y-shaped rubber ring 4. The Y-shaped rubber ring is filled in an annular groove formed by the flange, the sealing ring and the inner pipe, and a surface groove of the Y-shaped rubber ring faces the connecting elbow. Set up the pipe 6 that compresses tightly of surface fretwork between Y type rubber circle and the blind flange, compress tightly the inside pipe wall and be equipped with annular spacing ring 7 that the round offsets with the inner tube tip, the group between the two welds. The left end of the pressing pipe is matched with a surface groove of the Y-shaped rubber ring, and the right end of the pressing pipe is hermetically welded with the flange cover.

When the device is used, the flanges are respectively welded with the outer pipe and the sealing ring in an assembling way, the limiting ring is welded with the pressing pipe in an butt joint way, and the flange covers are respectively welded with the pressing pipe and the connecting elbow in an assembling way. The Y-shaped rubber ring is placed at the joint of the sealing ring and the flange. The inner pipe is arranged in the sealing ring and the Y-shaped rubber ring. Through double-screw bolt, nut, sealed pad with flange lid and flange sealing connection, compress tightly during the pipe inserts the pressure chamber, overlap at the inner tube tip, contact and extrusion Y type rubber circle, until the spacing ring supports the inner tube tip, compress tightly the unable continuation removal of pipe. Through the slow pressure boost of tube side, inner tube medium gets into the pressure chamber through compressing tightly pipe surface through-hole for pressure chamber internal pressure risees, and Y type rubber circle compresses tightly flange and inner tube and reaches the purpose of sealed tube, shell side.

It is to be understood that the present invention has been described in detail with reference to the foregoing embodiments, and that modifications and equivalents of the various embodiments described above may be made by those skilled in the art, or some of the technical features may be substituted. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The sleeve pipe head connecting structure of the sleeve pipe heat exchanger comprises an inner pipe (1), an outer pipe (2), a sealing ring (3), a connecting elbow (12), a flange (5) and a flange cover (9), wherein the end part of the outer pipe (2) is welded with the end face of the flange (5) in a sealing manner, the inner pipe (1) is sleeved on the inner ring of the flange (5) through the sealing ring (3), the end part of the connecting elbow (12) is connected with the inner ring of the flange cover (9) in a sealing manner, and the flange (5) is detachably connected with the flange cover (9), and is characterized in that a pressure cavity is formed between the flange (5) and the flange cover (9), the left end of the pressure cavity is communicated with the inner pipe (1), and the right end of the pressure cavity is communicated with the connecting elbow (12); the outer side of the inner pipe (1) in the pressure cavity is sleeved with a Y-shaped rubber ring (4), the Y-shaped rubber ring (4) is filled in an annular groove formed by the flange (5), the sealing ring (3) and the inner pipe (1), and a groove on the surface of the Y-shaped rubber ring is arranged towards the connecting elbow (12); a pressing pipe (6) with a hollowed surface is arranged between the Y-shaped rubber ring (4) and the flange cover (9), and the inner wall of the pressing pipe (6) is provided with a ring-shaped limiting ring (7) which is abutted against the end part of the inner pipe (1); the left end of the pressing pipe (6) is matched with a surface groove of the Y-shaped rubber ring (4), and the right end of the pressing pipe is connected with the flange cover (9).

2. The double pipe head connection structure of a double pipe heat exchanger according to claim 1, wherein a packing (8) is provided between the flange (5) and the flange cover (9).

3. The casing pipe head connection structure of a double pipe heat exchanger according to claim 2, wherein the end of the connection elbow (12) is welded to the inner ring of the flange cover (9), and the end of the compression pipe (6) is welded to the end face of the flange cover (9).

4. The double pipe head connection structure of a double pipe heat exchanger according to claim 2, wherein the compression pipe (6) and the stopper ring (7) are integrally formed or butt-welded.