Novel outer draft tube heat exchanger
By optimizing the structure of the guide tube and the design of the pipes, the problem of uneven fluid distribution in the external guide tube heat exchanger was solved, achieving a more uniform fluid distribution and efficient heat transfer, thus improving heat exchange efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG ZHENGNUO CHEM EQUIP CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-09
AI Technical Summary
Existing external guide tube heat exchangers have the problem of uneven fluid distribution, resulting in uneven fluid distribution when entering the tube bundle.
An optimized flow guide tube structure design is adopted, with a spiral flow guide plate and a flow equalization grid inside the flow guide tube. A flow equalization grid is also set at the connection between the flow guide tube and the tube bundle. Combined with the coaxial arrangement of the spiral hot medium pipeline and the straight cold medium pipeline, the contact area between the hot medium and the heat-conducting medium inside the shell is increased.
This allows for more uniform fluid entry into the tube bundle, avoids direct fluid impact on the tube bundle, improves the uniformity of fluid distribution, and increases heat exchange efficiency by increasing the contact area between the heat medium and the heat-conducting medium inside the shell.
Smart Images
Figure CN224340761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, specifically a novel external guide tube heat exchanger. Background Technology
[0002] The external guide tube heat exchanger is a common type of shell-and-tube heat exchanger. Its main characteristic structure is the external guide tube located outside the heat exchanger shell. Fluid first enters the external guide tube and then enters the tube side or shell side of the heat exchanger. The guide tube guides the fluid flow, making the fluid distribution more uniform and reducing dead zones and localized overheating or undercooling.
[0003] The existing external guide tube heat exchanger still has the following problems when in use: the external guide tube heat exchanger has the problem of uneven fluid distribution in terms of the flow guiding method. Although the design purpose of the external guide tube is to make the fluid evenly distributed, in actual operation, due to factors such as the structural design of the guide tube, the velocity and direction of the inlet fluid, the fluid may still be unevenly distributed when entering the tube bundle. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a novel external guide tube heat exchanger, which solves the problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel external guide tube heat exchanger, comprising a shell mechanism, wherein a heat exchange mechanism is built into the shell mechanism, and a guide mechanism is configured at the top of the heat exchange mechanism. The shell mechanism includes a base, and a housing is fixedly connected to the middle of the top of the base. The guide mechanism includes a hot medium pipe and a cold medium pipe fixedly installed inside the housing. The hot medium pipe is spirally arranged, and the cold medium pipe is a straight pipe. The cold medium pipe is located inside the hot medium pipe, and the two are coaxially arranged.
[0008] As a further embodiment of this utility model: the flow guiding mechanism includes a flow guiding cylinder fixedly connected to the upper interface of the heat medium pipeline, a spiral flow guiding plate fixedly connected to the middle of the inner side wall of the flow guiding cylinder, and a flow equalization grid fixedly installed below the inner side wall of the flow guiding cylinder.
[0009] As a further embodiment of this utility model: each of the four corners of the base is provided with an installation hole, and a pipe bracket is fixedly connected to the middle of each side of the top of the base. Both pipe brackets are inside the shell and the top of the pipe bracket is fixedly connected to a heat medium pipe. The top and rear sides of the inner sidewall of the shell are provided with a first pipe groove for fixing the heat medium pipe, and the two ends of the inner sidewall of the shell are provided with a second pipe groove for fixing the cold medium pipe.
[0010] As a further embodiment of this utility model: a first connecting flange is fixedly connected to the interface of the hot medium pipeline at the end away from the guide tube; a second connecting flange is fixedly connected to the interfaces at both ends of the cold medium pipeline; a third connecting flange is fixedly connected to the interface at the top of the guide tube; and a sealing column is fixedly connected to the center of the spiral guide plate.
[0011] As a further improvement of this utility model: a handle is fixedly connected to each of the two sides of the top of the housing, an inlet / outlet is provided at the center of the top of the housing, and an inlet / outlet control valve is fixedly installed at the top of the housing and at the opening of the inlet / outlet.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. In this utility model, by adopting an optimized guide tube structure design, a guide component is provided inside the guide tube, that is, a spiral guide plate is fixedly connected to the wall of the guide tube, and a flow equalization grid is provided at the connection between the guide tube and the tube bundle, so that the fluid can enter the tube bundle more evenly and avoid direct impact on the tube bundle causing uneven fluid distribution.
[0014] 2. In this utility model, the overall external guide tube heat exchanger adopts an integrated structural design with two symmetrical handles on its upper end for easy lifting and movement. It also adopts a surrounding heat exchange structure design, with the hot medium pipe adopting a spiral structure design and surrounding the outside of the cold medium pipe. Both pipes are set inside the heat exchanger shell. The spiral structure increases the contact area between the hot medium pipe and the heat-conducting medium inside the shell, which is conducive to heat conduction into the heat-conducting medium and then to the cold medium pipe, thus completing the efficient heat exchange work. Attached Figure Description
[0015] Figure 1 The overall three-dimensional structure of this utility model Figure 1 ;
[0016] Figure 2 The overall three-dimensional structure of this utility model Figure 2 ;
[0017] Figure 3 This is a partial sectional perspective view of the outer shell mechanism of this utility model;
[0018] Figure 4 This is a partial sectional perspective view of the heat exchange mechanism and flow guiding mechanism of this utility model.
[0019] In the diagram: 1. Outer shell; 2. Heat exchange mechanism; 3. Flow guiding mechanism; 11. Base; 12. Mounting hole; 13. Pipe rack; 14. Shell; 15. First pipe groove; 16. Second pipe groove; 17. Inlet / outlet liquid control valve; 18. Handle; 21. Hot medium pipeline; 22. First connecting flange; 23. Cold medium pipeline; 24. Second connecting flange; 31. Flow guide tube; 32. Spiral guide plate; 33. Sealing column; 34. Third connecting flange; 35. Flow equalization grid. Detailed Implementation
[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] Please see Figures 1-4In this embodiment of the utility model, the novel external guide tube heat exchanger includes a shell mechanism 1, a heat exchange mechanism 2 built into the shell mechanism 1, and a guide mechanism 3 configured at the top of the heat exchange mechanism 2. The shell mechanism 1 includes a base 11, and a shell 14 is fixedly connected to the middle of the top of the base 11. The guide mechanism 3 includes a hot medium pipe 21 and a cold medium pipe 23 fixedly installed inside the shell 14. The hot medium pipe 21 is spirally arranged, and the cold medium pipe 23 is a straight pipe. The cold medium pipe 23 is located inside the hot medium pipe 21 and the two are coaxially arranged. The whole adopts a surrounding heat exchange structure design. The hot medium pipe 21 adopts a spiral structure design and surrounds the outside of the cold medium pipe 23. Both pipes are set inside the heat exchanger shell 14. The spiral structure increases the contact area between the hot medium pipe 21 and the heat-conducting medium inside the shell 14, which is conducive to the heat conduction to the heat-conducting medium, and then the heat can be conducted to the cold medium pipe 23 to complete the efficient heat exchange work.
[0024] The flow guiding mechanism 3 includes a flow guiding cylinder 31 fixedly connected to the upper interface of the heat medium pipeline 21. A spiral guide plate 32 is fixedly connected to the middle of the inner wall of the flow guiding cylinder 31. A flow equalization grid 35 is fixedly installed at the lower part of the inner wall of the flow guiding cylinder 31. The overall structure of the flow guiding cylinder 31 adopts an optimized design. The flow guiding component is set inside the flow guiding cylinder 31, that is, a spiral guide plate 32 is fixedly connected to the cylinder wall of the flow guiding cylinder 31, and a flow equalization grid 35 is set at the connection between the flow guiding cylinder 31 and the tube bundle, so that the fluid can enter the tube bundle more evenly and avoid direct impact on the tube bundle causing uneven fluid distribution.
[0025] The base 11 has a mounting hole 12 at each of its four corners. The heat exchanger can be fixedly installed by using the mounting holes 12 on the base 11 and the mounting components. A tube bracket 13 is fixedly connected to the middle of each side of the top of the base 11. Both tube brackets 13 are inside the shell 14 and the top of the tube bracket is fixedly connected to the heat medium pipe 21. The top and rear sides of the inner wall of the shell 14 have first tube grooves 15 for fixing the heat medium pipe 21. The inner walls of the shell 14 have second tube grooves 16 for fixing the cold medium pipe 23.
[0026] A first connecting flange 22 is fixedly connected to the interface of the hot medium pipeline 21 at the end away from the guide tube 31. A second connecting flange 24 is fixedly connected to each of the interfaces at both ends of the cold medium pipeline 23. A third connecting flange 34 is fixedly connected to the interface at the top of the guide tube 31. A sealing column 33 is fixedly connected to the center of the spiral guide plate 32 to provide a sealing function at the center of the spiral guide plate 32.
[0027] A handle 18 is fixedly connected to each side of the top of the shell 14. An inlet and outlet liquid port is opened at the center of the top of the shell 14. An inlet and outlet liquid control valve 17 is fixedly installed at the top of the shell 14 and at the opening of the inlet and outlet liquid port. The overall external guide tube 31 heat exchanger adopts an integrated structure design. Two handles 18 are symmetrically arranged at its upper end, which can be lifted for convenient movement. The heat transfer medium can be added to the shell 14 through the inlet and outlet liquid control valve 17.
[0028] The working principle of this utility model is as follows: the input pipe of the hot medium can be connected through the third connecting flange 34, the output pipe of the hot medium can be connected through the first connecting flange 22, and the delivery pipe of the cold medium can be connected through the two second connecting flanges 24. The overall heat exchanger is fixedly installed by using the mounting holes 12 on its base 11 in conjunction with the mounting components. Since the overall heat exchange structure is designed in a surrounding manner, the hot medium pipe 21 adopts a spiral structure design and surrounds the outside of the cold medium pipe 23. Both pipes are set inside the heat exchanger shell 14. The spiral structure increases the contact area between the hot medium pipe 21 and the heat-conducting medium inside the shell 14, which is conducive to the heat conduction into the heat-conducting medium, and then the heat can be conducted to the cold medium pipe 23 to complete the efficient heat exchange work.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A novel external guide tube heat exchanger, comprising an outer shell mechanism (1), wherein a heat exchange mechanism (2) is built into the outer shell mechanism (1), and a guide mechanism (3) is disposed at the top of the heat exchange mechanism (2); Its features are: The outer shell mechanism (1) includes a base (11), and a housing (14) is fixedly connected to the top center of the base (11). The flow guiding mechanism (3) includes a hot medium pipe (21) and a cold medium pipe (23) fixedly installed inside the housing (14). The hot medium pipe (21) is arranged in a spiral shape, and the cold medium pipe (23) is a straight pipe. The cold medium pipe (23) is located inside the hot medium pipe (21) and the two are arranged coaxially. The flow guiding mechanism (3) includes a flow guiding cylinder (31) fixedly connected to the upper interface of the heat medium pipeline (21), a spiral flow guiding plate (32) fixedly connected to the middle of the inner side wall of the flow guiding cylinder (31), and a flow equalization grid (35) fixedly installed below the inner side wall of the flow guiding cylinder (31).
2. The novel external guide tube heat exchanger according to claim 1, characterized in that: The base (11) has a mounting hole (12) at each of its four corners, and a tube frame (13) is fixedly connected to the middle of each side of the top of the base (11).
3. The novel external guide tube heat exchanger according to claim 2, characterized in that: Both of the tube supports (13) are inside the shell (14) and the top end is fixedly connected to the heat medium pipe (21).
4. The novel external guide tube heat exchanger according to claim 1, characterized in that: A first connecting flange (22) is fixedly connected to the interface at the end of the hot medium pipeline (21) away from the guide tube (31), and a second connecting flange (24) is fixedly connected to the interfaces at both ends of the cold medium pipeline (23).
5. The novel external guide tube heat exchanger according to claim 1, characterized in that: A third connecting flange (34) is fixedly connected to the interface at the top of the guide tube (31), and a sealing column (33) is fixedly connected to the center of the spiral guide plate (32).
6. The novel external guide tube heat exchanger according to claim 1, characterized in that: The top and rear sides of the inner wall of the shell (14) are provided with a first groove (15) for fixing a heating medium pipe (21), and the two ends of the inner wall of the shell (14) are provided with a second groove (16) for fixing a cooling medium pipe (23).
7. The novel external guide tube heat exchanger according to claim 1, characterized in that: A handle (18) is fixedly connected to each side of the top of the housing (14). An inlet / outlet is provided at the center of the top of the housing (14). An inlet / outlet control valve (17) is fixedly installed at the top of the housing (14) and at the opening of the inlet / outlet.