Heat exchange device with independent water box

Abstract

The utility model discloses a heat exchange device with an independent water box, which comprises a plurality of heat exchange tubes and two groups of flow guide structures arranged at two ends of the heat exchange tubes, and the two groups of flow guide structures are used for communicating the plurality of heat exchange tubes so as to form a heat exchange path for fluid to flow in a matching way. Each flow guide structure comprises a plurality of independent water boxes, each water box comprises an end plate and a cover plate arranged on the outer side of the end plate in a sealed and oppositely-closed mode, the end plate is provided with two via holes allowing the heat exchange pipe parts to be inserted, and the cover plate comprises a cavity part used for integrally sealing and covering the two via holes in the end plate. According to the utility model, the communication between the ports of the two adjacent heat exchange tubes is realized through the independent water box structure, so that the water box can deform along with the deformation of the heat exchange tubes so as to release stress, meanwhile, the temperature difference between the two heat exchange tubes is smaller, and the deformation quantities of the two heat exchange tubes are close, thereby greatly reducing the risk of leakage caused by fracture at the joint.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchange device with an independent water box. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers occupy an important position in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used; among them, tube-fin heat exchange devices are a commonly used heat exchanger, which generally include heat exchange tubes, heat exchange fins arranged on the heat exchange tubes, and guide structures arranged at both ends of the heat exchange tubes. The existing guide structure generally includes an integrated end plate and an integrated cover plate sealed and welded on the outside of the end plate. The end plate is provided with through holes for all heat exchange tubes of the device to be inserted one by one, and the cover plate is provided with a plurality of guide grooves that cover at least two through holes to achieve communication between the ports of the corresponding heat exchange tubes. However, since the heat exchanger is often heated unevenly during use, the axial deformation of each heat exchange tube caused by thermal expansion and contraction is different, which will generate shear force at the guide structure, which can easily cause the connection between the heat exchange tube and the end plate to rupture and fail, especially the connection on the water inlet side, and there is room for improvement. Utility Model Content

[0003] The utility model aims to overcome the defects in the above-mentioned prior art and provides a heat exchange device with an independent water box, which adopts an independent water box structure to realize the communication between the ports of two adjacent heat exchange tubes, so that the independent water box can be deformed with the deformation of the heat exchange tube to release stress, and at the same time, the temperature difference between the two heat exchange tubes in the water box is small so that the deformation of the two heat exchange tubes is relatively close, thereby reducing the relative force generated at the connection between the corresponding heat exchange tube and the water box, and greatly reducing the risk of leakage caused by rupture of the connection.

[0004] To achieve the above-mentioned purpose, the utility model provides a heat exchange device with an independent water box, comprising a plurality of heat exchange tubes and two groups of guide structures arranged at both ends of the heat exchange tubes, the two groups of guide structures are used to connect the structures between the plurality of heat exchange tubes to cooperate to form a heat exchange path for fluid flow, each group of the guide structures includes a plurality of independent water boxes, each of the water boxes includes an end plate, and a cover plate sealingly arranged on the outside of the end plate, the end plate is provided with two through holes for inserting the heat exchange tube parts, and the cover plate includes a concave cavity portion for integrally covering the two through holes on the end plate.

[0005] It is further configured as follows: the cover plate is a cover body structure with one end open, the shape of the end plate is adapted to the opening shape of the cover plate, the end plate is provided with a flange along its outer edge circumference and the flange surrounds a groove for the cover plate to be embedded.

[0006] It is further configured that: the cover plate and the end plate are connected to each other by brazing.

[0007] It is further configured as follows: the first heat exchange tube whose port constitutes the inlet of the heat exchange path and the last heat exchange tube whose port constitutes the outlet of the heat exchange path are both circular cross-section tubes, and the remaining heat exchange tubes are all elliptical cross-section tubes.

[0008] Compared with the prior art, the utility model has a simple and reasonable structure, and adopts an independent water box structure to realize the connection between the ports of two adjacent heat exchange tubes. Such an independent water box can be deformed as the heat exchange tube is deformed to release stress. At the same time, the temperature difference between the two heat exchange tubes in the water box is small so that the deformation of the two heat exchange tubes is relatively close, thereby reducing the relative force generated at the connection between the corresponding heat exchange tube and the water box, and greatly reducing the risk of leakage caused by rupture of the connection; furthermore, the cover plate can effectively increase the height and volume of the water box by being connected to the flange of the end plate, thereby effectively reducing the flow resistance of the overall product. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional structural schematic diagram of a heat exchange device with an independent water box of the utility model;

[0010] Figure 2 It is a schematic diagram of the partial separation structure of the heat exchange device.

[0011] The following reference numerals are marked on the drawings in conjunction with the drawings:

[0012] 10. heat exchange tube; 11. circular cross-section tube; 12. elliptical cross-section tube; 20. heat exchange fin; 30. flow guide structure; 31. water box; 311. end plate; 3111. through hole; 3112. flange; 312. cover plate. DETAILED DESCRIPTION

[0013] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0014] The utility model provides a heat exchange device with an independent water box 31 such as Figure 1As shown, it includes a plurality of heat exchange tubes 10, a plurality of heat exchange fins 20 arranged on the heat exchange tubes 10, and two groups of guide structures 30 arranged at both ends of the heat exchange tubes 10. The two groups of guide structures 30 cooperate to connect the plurality of heat exchange tubes 10 to form a heat exchange path for fluid flow, so that the fluid flowing in the heat exchange path can exchange heat with the flue gas flowing through the heat exchange device.

[0015] In this embodiment, if Figure 2 As shown, each group of flow guiding structures 30 includes a plurality of independent water boxes 31, each water box 31 is used to connect the ports of two adjacent heat exchange tubes 10, so that the plurality of water boxes 31 of the two groups of flow guiding structures 30 cooperate to connect the ports of the plurality of heat exchange tubes 10 in pairs in sequence to form a heat exchange path, so that the two adjacent heat exchange tubes 10 are connected through the independent water boxes 31, which greatly reduces the water boxes 31; specifically, each water box 31 includes an end plate 311, and a sealing member arranged on the end plate 311 The outer cover plate 312 is preferably connected to the end plate 311 by brazing; wherein, the end plate 311 is provided with two through holes 3111 for inserting the ends of the heat exchange tubes 10, and the cover plate 312 has and only includes one concave cavity portion for integrally sealing the two through holes 3111 on the end plate 311, so that a closed water cavity is formed by cooperation between the concave cavity portion and the end plate 311, and the ends of the two heat exchange tubes 10 are respectively inserted into the through holes 3111 of the end plate 311 and can be connected through the water cavity.

[0016] Preferably, the cover plate 312 is a cover structure with an opening at one end, and the shape of the end plate 311 is adapted to the opening shape of the cover plate 312. The end plate 311 is provided with an outwardly extending flange 3112 along its outer circumference, and the flange 3112 is enclosed to form a groove for the cover plate 312 to be embedded. In this way, the height of the water cavity can be effectively increased to increase the volume of the water cavity by connecting the flange 3112 to the cover plate 312, thereby reducing the water flow resistance of the overall product.

[0017] In this embodiment, the first heat exchange tube 10 whose port constitutes the inlet of the heat exchange path and the last heat exchange tube 10 whose port constitutes the outlet of the heat exchange path are both circular cross-section tubes 11, and the remaining heat exchange tubes 10 are all elliptical cross-section tubes 1211.

[0018] Compared with the prior art, the utility model has a simple and reasonable structure, and adopts an independent water box structure to realize the connection between the ports of two adjacent heat exchange tubes. Such an independent water box can be deformed as the heat exchange tube is deformed to release stress. At the same time, the temperature difference between the two heat exchange tubes in the water box is small so that the deformation of the two heat exchange tubes is relatively close, thereby reducing the relative force generated at the connection between the corresponding heat exchange tube and the water box, and greatly reducing the risk of leakage caused by rupture of the connection; furthermore, the cover plate can effectively increase the height and volume of the water box by being connected to the flange of the end plate, thereby effectively reducing the flow resistance of the overall product.

[0019] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A heat exchange device with an independent water box, comprising a plurality of heat exchange tubes and two sets of flow guiding structures arranged at both ends of the heat exchange tubes, wherein the two sets of flow guiding structures are used to connect the plurality of heat exchange tubes to form a heat exchange path for fluid flow, characterized in that: Each group of the guide structures includes a plurality of independent water boxes, each of which includes an end plate and a cover plate sealingly arranged on the outside of the end plate, the end plate is provided with two through holes for inserting the heat exchange pipe part, and the cover plate includes a concave cavity part for integrally covering the two through holes on the end plate.

2. A heat exchange device with an independent water box according to claim 1, characterized in that: The cover plate is a cover body structure with one end open, the shape of the end plate is adapted to the opening shape of the cover plate, the end plate is provided with a flange along its outer circumference, and the flange surrounds a groove for the cover plate to be embedded.

3. A heat exchange device with an independent water box according to claim 1 or 2, characterized in that: The cover plate and the end plate are connected by brazing.

4. The heat exchange device with an independent water box according to claim 1, characterized in that: The first heat exchange tube whose port constitutes the inlet of the heat exchange path and the last heat exchange tube whose port constitutes the outlet of the heat exchange path are both circular cross-section tubes, and the remaining heat exchange tubes are all elliptical cross-section tubes.

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