Heat exchanger of aging oven

Abstract

The utility model discloses a heat exchanger of an aging oven. The heat exchanger comprises a combustion pipe, a redistribution collecting pipe and a plurality of U-shaped heat exchange pipes, one end of the combustion pipe is connected with the combustor, and the other end of the combustion pipe is connected with the redistribution collecting pipe; the straight pipe ends of the U-shaped heat exchange pipes are connected with the redistribution collecting pipe, so that heat energy of the combustion pipe is subjected to heat exchange through the U-shaped heat exchange pipes; at least one expansion joint is arranged on the bent pipe section of each U-shaped heat exchange pipe, and deformation allowance is reserved for thermal expansion and cold contraction of the single U-shaped heat exchange pipe; the straight pipe end parts of the plurality of U-shaped heat exchange pipes are fixedly connected with the redistribution collecting pipe, and the bent pipe sections are erected on a support frame, so that deformation allowance is reserved for thermal expansion and cold contraction of the plurality of U-shaped heat exchange pipes; the problem that a U-shaped pipe in a traditional tubular aging oven heat exchanger is prone to being damaged in the deformation of thermal expansion and cold contraction is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger structures, in particular to an aging furnace heat exchanger. Background Art

[0002] Aging furnace is a key equipment for heat treatment of metal materials, especially in the production of aluminum alloys, where aging treatment is essential for improving the mechanical properties of materials. In the aging furnace, the heat exchanger plays a role in regulating the temperature and ensuring the stability of the heat treatment process. Existing aging furnace heat exchangers usually adopt tubular, plate or other types of heat exchange structures to achieve heat transfer and control through the circulation of media (such as water, oil or gas).

[0003] However, the heat exchange tubes of the existing tubular aging furnace heat exchanger are usually U-shaped tubes, and the U-shaped tubes will expand and contract under temperature changes, which makes the U-shaped tubes easy to be damaged, thereby affecting the service life of the heat exchanger. Utility Model Content

[0004] The utility model aims to provide an aging furnace heat exchanger to solve the problem that the U-shaped tube in the traditional tubular aging furnace heat exchanger is easily damaged during the deformation due to thermal expansion and contraction.

[0005] In order to solve the above technical problems, the utility model provides an aging furnace heat exchanger, including a combustion tube, a redistribution header and a plurality of U-shaped heat exchange tubes;

[0006] One end of the combustion tube is connected to the burner, and the other end is connected to the redistribution header;

[0007] The straight tube ends of the plurality of U-shaped heat exchange tubes are connected to the redistribution header, so that the heat energy of the combustion tube is exchanged through the plurality of U-shaped heat exchange tubes;

[0008] The curved section of the U-shaped heat exchange tube is provided with at least one expansion joint, which leaves a deformation margin for the thermal expansion and contraction of the single U-shaped heat exchange tube;

[0009] The straight tube ends of the plurality of U-shaped heat exchange tubes are fixedly connected to the redistribution header, and the bent tube sections are mounted on the support frame, leaving deformation margins for the thermal expansion and contraction of the plurality of U-shaped heat exchange tubes.

[0010] Preferably, each of the U-shaped heat exchange tubes is surrounded by heat exchange fins.

[0011] Preferably, the heat exchange fins are densely distributed on the straight tube section of the U-shaped heat exchange tube.

[0012] Preferably, the two straight pipe sections of the U-shaped heat exchange tube are connected to the curved pipe section via elbows respectively.

[0013] Preferably, the expansion joint is a metal expansion joint, and the curved pipe section of the U-shaped heat exchange tube is cut and then connected via the expansion joint.

[0014] Preferably, an inner lining tube is provided inside the expansion joint, and the inner lining tube is used to ensure normal conduction of the U-shaped heat exchange tube at the expansion joint.

[0015] Preferably, one end of the liner pipe is fixed by welding, and the other end is free.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The U-shaped heat exchange tube of the utility model is provided with an expansion joint at the bent section, which leaves a deformation margin for the thermal expansion and contraction of the single U-shaped heat exchange tube;

[0018] 2. The straight tube end of the U-shaped heat exchange tube of the utility model is fixedly connected to the redistribution header, and the curved tube section is mounted on the support frame, so that the movement of the U-shaped heat exchange tube is not restricted on the support frame, and deformation margin is left for thermal expansion and contraction of multiple U-shaped heat exchange tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a top view of an aging furnace heat exchanger provided by the utility model;

[0020] Figure 2 This is a bottom view of an aging furnace heat exchanger provided by the utility model;

[0021] Figure 3 This is a left view of an aging furnace heat exchanger provided by the utility model;

[0022] Figure 4 It is a partial schematic diagram of the position of the expansion joint provided by the utility model.

[0023] In the figure: 1. combustion tube; 2. redistribution header; 3. U-shaped heat exchange tube; 4. expansion joint; 5. support frame; 6. heat exchange fin; 7. elbow; 8. liner tube. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0027] The utility model provides a heat exchanger for an aging furnace, see Figure 1-3 , including a combustion tube 1, a redistribution header 2 and a plurality of U-shaped heat exchange tubes 3; one end of the combustion tube 1 is connected to the burner, and the other end is connected to the redistribution header 2; the straight tube ends of the plurality of U-shaped heat exchange tubes 3 are connected to the redistribution header 2, so that the heat energy of the combustion tube 1 is exchanged through the plurality of U-shaped heat exchange tubes 3; the bent section of the U-shaped heat exchange tube 3 is provided with at least one expansion joint 4, leaving a deformation margin for the thermal expansion and contraction of a single U-shaped heat exchange tube 3; the straight tube ends of the plurality of U-shaped heat exchange tubes 3 are fixedly connected to the redistribution header 2, and the bent sections are mounted on a support frame 5, leaving a deformation margin for the thermal expansion and contraction of the plurality of U-shaped heat exchange tubes 3.

[0028] Specifically, each of the U-shaped heat exchange tubes 3 is surrounded by heat exchange fins 6 to further improve the heat exchange efficiency of the U-shaped heat exchange tubes 3 . The heat exchange fins 6 are densely distributed on the straight tube section of the U-shaped heat exchange tubes 3 .

[0029] Specifically, the two straight tube sections of the U-shaped heat exchange tube 3 are connected to the bent tube section through the elbow 7 respectively.

[0030] Furthermore, the expansion joint 4 is a metal expansion joint, and the curved pipe section of the U-shaped heat exchange tube 3 is cut off and then connected through the expansion joint 4.

[0031] In some embodiments, an inner lining tube 8 is provided inside the expansion joint 4, and the inner lining tube 8 ensures the normal conduction of the U-shaped heat exchange tube 3 at the expansion joint 4; one end of the inner lining tube 8 is fixed by welding, and the other end is free, so that the inner lining tube 8 can ensure the normal conduction of the U-shaped heat exchange tube 3 without affecting the bending deformation of the expansion joint 4.

[0032] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation to the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An aging furnace heat exchanger, characterized in that: It comprises a combustion tube (1), a redistribution header (2), and a plurality of U-shaped heat exchange tubes (3); One end of the combustion tube (1) is connected to the burner, and the other end is connected to the redistribution header (2); The straight tube ends of the plurality of U-shaped heat exchange tubes (3) are connected to the redistribution header (2), so that the heat energy of the combustion tube (1) is exchanged through the plurality of U-shaped heat exchange tubes (3); The curved section of the U-shaped heat exchange tube (3) is provided with at least one expansion joint (4), which leaves a deformation margin for thermal expansion and contraction of the single U-shaped heat exchange tube (3); The straight tube ends of the plurality of U-shaped heat exchange tubes (3) are fixedly connected to the redistribution header (2), while the bent tube sections are mounted on a support frame (5), leaving a deformation margin for thermal expansion and contraction of the plurality of U-shaped heat exchange tubes (3).

2. The aging furnace heat exchanger according to claim 1, characterized in that: Each of the U-shaped heat exchange tubes (3) is surrounded by a heat exchange fin (6).

3. The aging furnace heat exchanger according to claim 2, characterized in that: The heat exchange fins (6) are densely distributed on the straight tube section of the U-shaped heat exchange tube (3).

4. The aging furnace heat exchanger according to claim 1, characterized in that: The two straight pipe sections of the U-shaped heat exchange tube (3) are respectively connected to the bent pipe section via elbows (7).

5. The aging furnace heat exchanger according to claim 1, characterized in that: The expansion joint (4) is a metal expansion joint, and the curved pipe section of the U-shaped heat exchange tube (3) is cut and then connected via the expansion joint (4).

6. The aging furnace heat exchanger according to claim 5, characterized in that: An inner lining tube (8) is provided inside the expansion joint (4), and the inner lining tube (8) ensures normal conduction of the U-shaped heat exchange tube (3) at the expansion joint (4).

7. The aging furnace heat exchanger according to claim 6, characterized in that: One end of the inner liner pipe (8) is fixed by welding, and the other end is free.

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