CN212458036U

CN212458036U - Double-pipe heat exchanger

Info

Publication number: CN212458036U
Application number: CN202021667903.2U
Authority: CN
Inventors: 任宇宙; 曾宪芳
Original assignee: Beijing Fenglian Aorui Technology Co ltd
Current assignee: Beijing Fenglian Aorui Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-02-02
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a sleeve heat exchanger, which comprises a collecting pipe, a sleeve and a connecting pipe; the headers comprise an outer header and an inner header, the outer header comprises an outer inlet header and an outer outlet header, and the inner header comprises an inner inlet header and an inner outlet header; the sleeve comprises an outer sleeve and an inner sleeve; the outer sleeve is sleeved outside the inner sleeve, and a plurality of sleeves are vertically connected to the collecting pipe in parallel; the connecting pipe connects the sleeve and the header. The utility model has the advantages that with the vertical setting of sleeve pipe, can prevent that the fluid from storing up in the intraductal, increase sleeve pipe length, increase heat transfer area improves the heat transfer effect. And each sleeve pipe is arranged in parallel, so that the temperature of working media entering each outer sleeve pipe and each inner sleeve pipe is the same, and the heat exchange effect is further enhanced.

Description

Double-pipe heat exchanger

Technical Field

The utility model relates to a heat exchanger field, specific theory relates to a double pipe heat exchanger.

Background

When the cold fluid and the hot fluid exchange heat, a double-pipe heat exchanger can be adopted, one fluid flows in the inner pipe, the other fluid flows in the outer pipe, and the two fluids exchange heat through the pipe wall. The straight pipe sections need to be connected in series through the U-shaped elbow pipes of the double-pipe heat exchanger, the straight pipe sections are generally horizontally arranged, and when the pipeline is too long, the pipe sections can be bent downwards, so that fluid in the pipeline is unevenly distributed, therefore, the straight pipe sections cannot be designed too long, and most of the double-pipe heat exchangers are not large in heat transfer area. And the U-shaped bend of the double-pipe heat exchanger is more, so that the resistance of the pipeline is increased.

Disclosure of Invention

An object of the utility model is to overcome the problem that above-mentioned prior art exists, and provide a double pipe heat exchanger, through adopting with the vertical setting of sleeve pipe, parallel connection to the mode of collector, it is short to have solved the straight tube section of double pipe heat exchanger, the many problems of bend, and each sleeve pipe sets up side by side moreover, makes the temperature that gets into each outer tube and interior sheathed tube working medium the same respectively, has further strengthened the heat transfer effect.

The utility model provides a technical problem adopt following technical scheme:

a double-pipe heat exchanger comprises a collecting pipe, a double pipe and a connecting pipe; the headers comprise an outer header and an inner header, the outer header comprises an outer inlet header and an outer outlet header, and the inner header comprises an inner inlet header and an inner outlet header; the sleeve comprises an outer sleeve and an inner sleeve; the outer sleeve is sleeved outside the inner sleeve, and a plurality of sleeves are connected to the collecting pipe in parallel; the connecting pipe connects the sleeve and the header.

Further, the sleeve is a straight pipe and is vertically connected to the collecting pipe.

Furthermore, the two ends of the outer sleeve are provided with end covers with holes in the centers, the inner sleeve penetrates through the end covers, the two ends of the inner sleeve are directly connected with the inner collecting pipe, and the connecting pipe is connected with the outer sleeve and the outer collecting pipe.

Furthermore, both ends of the outer sleeve are directly connected with the outer collecting pipe, and the connecting pipe penetrates through the outer sleeve to be connected with the inner sleeve and the inner collecting pipe.

Furthermore, the end covers are connected with the end ports of the outer sleeve and the inner sleeve in a welding mode, and the two ends of the outer sleeve are sealed.

Furthermore, a low-rib internal thread is arranged on the inner side of the inner sleeve.

Furthermore, fins are arranged on the outer side of the outer sleeve.

Further, the header, the sleeve and the connection pipe are connected by welding.

Further, the outer sleeve and the inner sleeve are concentric sleeves.

Further, the cross-sectional shapes of the inner sleeve and the outer sleeve are round, rectangular, other shapes or a combination thereof.

The utility model discloses a double-pipe heat exchanger's advantage is with the vertical setting of sleeve pipe, can prevent that the fluid from storing up in the intraductal, increase sleeve pipe length, increase heat transfer area improves the heat transfer effect. And each sleeve is arranged in parallel, so that the temperature of the working medium entering each outer sleeve is the same, and the temperature of the working medium entering each inner sleeve is the same, and the heat exchange effect is further enhanced.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of the double-pipe heat exchanger of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of the double-pipe heat exchanger of the present invention.

In the figure: (1) an external inlet manifold; (2) an inner outlet header; (3) an inner inlet header; (4) an outgoing header; (5) an inner sleeve; (6) an outer sleeve; (7) a connecting pipe; (8) and (4) end covers.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "horizontal", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, is a schematic structural diagram of a first embodiment of the present invention. A double pipe heat exchanger comprises a collecting pipe, a double pipe and a connecting pipe 7; the headers comprise an outer header comprising an outer inlet header 1 and an outer outlet header 4, and an inner header comprising an inner inlet header 3 and an inner outlet header 2; the sleeve comprises an outer sleeve 6 and an inner sleeve 5, the outer sleeve 6 is concentrically sleeved outside the inner sleeve 5, two ends of the outer sleeve 6 are directly connected with an outer collecting pipe, the connecting pipe 7 penetrates through the outer sleeve 6 to be connected with the inner sleeve 5 and the inner collecting pipe, and the collecting pipe, the sleeve and the connecting pipe 7 are connected through welding. The outer manifold is filled with a first medium, the inner manifold is filled with a second medium, and the first medium and the second medium are two media with different temperatures, can be the same medium, and can also be different media. The sleeve is a straight pipe, and a plurality of sleeves are vertically connected to the collecting pipe in parallel. The first medium directly enters each outer sleeve 6 from the outer inlet collecting pipe 1, the second medium enters each inner sleeve 5 from the inner inlet collecting pipe 3 through the connecting pipe 7, the first medium and the second medium exchange heat through the pipe wall of the inner sleeve 5, after heat exchange, the first medium directly enters the outer outlet collecting pipe 4, and the second medium enters the inner outlet collecting pipe 2 through the connecting pipe 7. The flow direction of the media in the outer sleeve 6 and the inner sleeve 5 may be either co-current or counter-current. The plurality of sleeves are arranged in parallel, the temperature of the first working medium entering each outer sleeve 6 is the same, the temperature of the second working medium entering each inner sleeve 5 is the same, and the heat exchange effect of the heat exchanger is enhanced. The sleeve pipe is vertical direction setting, and the medium can not cause depositing of fluid when flowing in the sleeve pipe, also need not restrict sheathed tube length and prevent that the sleeve pipe in the fluid too much and bending deformation to can increase sleeve pipe length, increase heat transfer area improves the heat transfer effect.

As shown in fig. 2, is a schematic structural diagram of a second embodiment of the present invention. Unlike the first embodiment, this embodiment has a centrally apertured end cap 8 at each end of the outer sleeve 6, the inner sleeve 5 passing through the end cap 8 and having both ends directly connected to the inner header, and the connecting tube 7 connecting the outer sleeve 6 and the outer header. The end covers 8 are connected with the end ports of the outer sleeve 6 and the inner sleeve 5 in a welding mode, and the two ends of the outer sleeve 6 are sealed. The first medium enters each outer sleeve 6 from the outer inlet collecting pipe 1 through the connecting pipe 7, the second medium directly enters each inner sleeve 5 from the inner inlet collecting pipe 3, the first medium and the second medium exchange heat through the pipe wall of the inner sleeve 5, after heat exchange, the first medium enters the outer outlet collecting pipe 4 through the connecting pipe 7, and the second medium directly enters the inner outlet collecting pipe 2. The outer collecting pipe, the outer sleeve 6 and the connecting pipe 7 are connected through welding, and the outer side of the outer sleeve 6 is welded, so that the complexity and difficulty of a welding process are reduced.

In order to further enhance the heat exchange effect, a low-rib internal thread may be provided inside the inner sleeve 5, and a fin may be provided outside the outer sleeve 6.

The cross section shapes of the sleeve pipe 5 and the outer sleeve pipe 6 in the sleeve pipe heat exchanger are circular, rectangular, other shapes or the combination thereof.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The double-pipe heat exchanger is characterized by comprising a header, a double pipe and a connecting pipe; the headers comprise an outer header and an inner header, the outer header comprises an outer inlet header and an outer outlet header, and the inner header comprises an inner inlet header and an inner outlet header; the sleeve comprises an outer sleeve and an inner sleeve; the outer sleeve is sleeved outside the inner sleeve, and a plurality of sleeves are connected to the collecting pipe in parallel; the connecting pipe connects the sleeve and the header.

2. The double-tube heat exchanger according to claim 1, wherein the tubes are straight tubes and are vertically connected to a header.

3. A tube-in-tube heat exchanger according to claim 1, characterized in that the outer tube is provided at both ends with centrally apertured end caps, the inner tube is passed through the end caps and is directly connected at both ends to the inner header, and the connection tube connects the outer tube and the outer header.

4. The tube-in-tube heat exchanger of claim 1, wherein both ends of the outer tube are directly connected to the outer header, and the connection tube passes through the outer tube to connect the inner tube and the inner header.

5. The double-tube heat exchanger according to claim 3, wherein the end caps are welded to the outer tube ports and the inner tube to close both ends of the outer tube.

6. The double-pipe heat exchanger according to claim 1, wherein a low-rib internal thread is provided inside the inner pipe.

7. The double-tube heat exchanger as claimed in claim 1, wherein fins are provided outside the outer tube.

8. The double-tube heat exchanger according to claim 1, wherein the header, the double tube and the connection tube are connected by welding.

9. The double-tube heat exchanger according to claim 1, wherein the outer and inner tubes are concentric tubes.

10. The double-tube heat exchanger according to claim 1, wherein the cross-sectional shape of the inner tube is circular or rectangular, and the cross-sectional shape of the outer tube is circular or rectangular.