A multi-core combined structure of an aluminum plate-fin heat exchanger

Abstract

The utility model belongs to the technical field of plate-fin heat exchangers, and specifically relates to a multi-core combination structure of an aluminum plate-fin heat exchanger. It includes a core group, a left head provided at one end of the core group, a right head provided at the other end of the core group, and a spacing area between two adjacent cores in the core group. The core group is composed of at least two cores stacked in a vertical partition direction, and the spacing area is the area between the adjacent side plates of the two cores; a metal wire cloth is provided in the spacing area, and spacing seals are provided around the spacing area to seal the area. The technical solution provided by the utility model is fixed by sealing strips on all sides, and a dense metal fabric cushion layer is evenly laid in the middle to make the heat transfer extremely uniform and rapid, so that the manufacturing welding quality risk is greatly reduced, and the operating efficiency is greatly improved. The seals are placed in the venting and exhausting channels so that abnormalities in operation can be discharged in a timely and safe manner. This structure improves the comprehensive performance from design and manufacturing to installation and use and the entire life cycle.

Description

Technical Field

[0001] The utility model belongs to the technical field of plate-fin heat exchangers, and in particular relates to a multi-core combined structure of an aluminum plate-fin heat exchanger. Background Art

[0002] In gas liquefaction process, natural gas processing and chemical plant, cold box device is an essential cryogenic device for pre-treatment and terminal processing unit. Due to various reasons, such as transportation size restriction (road conditions), user site layout restriction (site layout), relative position requirements between cold box and other equipment (siphon calculation), interference of other supporting facilities on site (valves, pipe racks, etc.), etc., cold box manufacturers have to minimize the overall size of cold box as much as possible on the basis of meeting process performance requirements and safety requirements.

[0003] like Figure 1 As shown, the plate-fin heat exchanger mainly includes fins 11, partitions 12, seals 13, guide vanes 14 and head 15. The fins 11 are placed between two adjacent partitions 12, and the seals 13 are used to form a sandwich around to form a fluid channel. The guide vanes 14 are generally located at both ends of the fins 11 and are used to guide the inlet and outlet of the fluid. Multiple sandwiches are stacked according to different fluid modes. During brazing, the brazing alloy on the surface of the partition 12 melts to weld the fins, seals and partitions into a whole to form a core 16. Side plates 17 are provided on both sides of the core. The head 15 is usually welded and assembled by a head body, a pipe, an end plate, a flange and other parts, and is used to distribute and gather the medium and connect the core with the process pipeline.

[0004] The multi-core structure is a plate-fin heat exchanger that includes multiple cores, and the multiple cores share the headers at both ends. The multi-core structure optimizes the size of the cold box, but due to the large temperature difference and concentrated thermal stress during the assembly process of core brazing and header arc welding, the welding quality is unstable, which limits its application in actual production. Utility Model Content

[0005] The utility model provides a multi-core combined structure of an aluminum plate-fin heat exchanger, which is used to solve the problems of large assembly temperature difference and low yield rate of the current multi-core plate-fin heat exchanger.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: the multi-core combination structure of the aluminum plate-fin heat exchanger includes a core group, a left head arranged at one end of the core group, a right head arranged at the other end of the core group, and a spacing area between two adjacent cores in the core group, the core group is composed of at least two cores stacked along the vertical partition direction, and the spacing area is the area between adjacent side plates of the two cores; a metal wire cloth is arranged in the spacing area, and spacing seals are arranged around the spacing area to close the area.

[0007] The metal fabric cushion layer has excellent heat transfer performance, which can keep the heat input continuous and uniform during welding, reducing the risk of local brazing seam weakness; continuous and uninterrupted heat conduction can make the temperature of two or more cores with the same internal structure uniform and continuous during cold operation, reducing the problem of uneven thermal performance of the same fluid in the same head at the gaps between different cores.

[0008] Optionally, the metal wire cloth is laid flat on the side plate layer by layer in the spacing area, and the number of layers is 2-5.

[0009] Optionally, the metal wire cloth is made of aluminum wire or steel wire.

[0010] Optionally, the wire diameter of the metal wire of the metal wire cloth is 0.1-0.3 mm, and the hole diameter is 3-9 mm.

[0011] The extremely dense wire cloth has better elasticity, can evenly transfer heat, continuously optimize temperature difference, reduce thermal shock, reduce local thermal stress, and extend the service life of the product.

[0012] Optionally, the spacing seal has a flat head on one side and a wedge-shaped head on the other side, and the wedge-shaped side is close to the center of the spacing area.

[0013] Optionally, an isolation belt is provided between the spacer seal and the laid wire cloth.

[0014] Optionally, the spacing seal strip is provided with at least one exhaust channel communicating with the interior of the spacing area.

[0015] Optionally, the exhaust passage includes ventilation holes arranged on the spacing seal, ventilation pipes welded and fixed at the corresponding ventilation holes, and an elastic cap arranged on the ventilation pipe.

[0016] An elastic cap is arranged on the ventilation pipe to prevent foreign objects from entering the interval area from the ventilation pipe in reverse direction, causing injury and passage obstruction.

[0017] The technical solution provided by the utility model adopts sealing strips on all sides for fixing, and a dense metal fabric cushion layer is evenly laid in the middle to make the heat transfer extremely uniform and rapid, so that the risk of manufacturing welding quality is greatly reduced and the efficiency during operation is greatly improved. The seals are placed in the venting and exhaust channels so that the abnormalities in the operation can be discharged in time and safely. This structure improves the comprehensive performance from design and manufacturing to installation and use and the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the plate-fin heat exchanger described in the prior art;

[0019] Figure 2It is a structural schematic diagram of a specific implementation method of the multi-core combined structure of the aluminum plate-fin heat exchanger described in the utility model;

[0020] Figure 3 It is a structural schematic diagram of a specific implementation method of the spacing area of ​​the utility model;

[0021] Figure 4 yes Figure 3 A partial enlarged view of the BB section of the middle A part;

[0022] Figure 5 yes Figure 3 A partial enlarged view of the DD section of the middle C part.

[0023] As shown in the figure:

[0024] 11- fin, 12- partition, 13- seal, 14- guide vane, 15- head, 16- core, 17- side plate;

[0025] 20-core group, 21-first core, 22-second core, 30-left head, 40-right head;

[0026] 50 - partition area, 51 - wire cloth, 52 - partition seal, 53 - isolation belt, 54 - exhaust channel, 541 - vent hole, 542 - ventilation pipe, 543 - cover cap. DETAILED DESCRIPTION

[0027] For ease of understanding, the multi-core combination structure of the aluminum plate-fin heat exchanger is described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 according to specific circumstances.

[0030] like Figure 2 As shown, the multi-core assembly structure of the aluminum plate-fin heat exchanger includes a core group 20, a left head 30 arranged at one end of the core group 20, a right head 40 arranged at the other end of the core group 20, and a spacing area 50 located between two adjacent cores in the core group 20. It should be noted that, in order to clearly show the spacing area 50, Figure 2 The dimensions of the spacing regions 50 shown in FIG. 5 are exaggerated relative to the dimensions of the core and the like.

[0031] In this embodiment, the core group 20 is composed of a first core 21 and a second core 22 stacked in a direction perpendicular to the partition. Figure 2 The spacing area 50 is the area between the adjacent side plates 17 of the upper and lower core bodies.

[0032] like Figure 3 As shown, a wire cloth 51 is arranged in the spacing area 50, and a spacing seal 52 is arranged around the spacing area to seal the area. An isolation belt 53 is arranged between the spacing seal 52 and the laid wire cloth 51. The spacing seal 52 is provided with at least one exhaust channel 54 communicating with the interior of the spacing area 50. In this embodiment, the exhaust channel 54 is arranged on the narrow side spacing seal 52, and each side is provided with one and is located at the diagonal position, as shown in FIG. Figure 4 As shown, in this embodiment, the exhaust channel 54 includes a vent hole 541 provided on the spacing seal 52, a vent pipe 542 welded and fixed at the corresponding vent hole 541, and an elastic cap 543 provided on the vent pipe 542. Here, the vent hole 541 is opened by drilling after the spacing seal 52 seals the spacing area 50 by welding, and the elastic cap 543 is made of rubber. In one or more embodiments, the spacing seal 52 is provided between two side plates opposite to the first core 21 and the second core 22.

[0033] Continue to see Figure 4 and 5 The metal wire cloth 51 is laid flat on the side plate 17 layer by layer in the spacing area 50, and the number of layers is 2-5. In this embodiment, 3 layers are laid. The spacing seal 52 has a flat head on one side and a wedge-shaped side on the other side, and the wedge-shaped side is close to the center of the spacing area 50.

[0034] The metal wire cloth 51 is made of aluminum wire or steel wire. In this embodiment, it is made of aluminum wire. The wire diameter of the aluminum wire is about 0.2 mm. The hole diameter of the metal wire cloth 51 is about 3-9 mm.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A multi-core combined structure of an aluminum plate-fin heat exchanger, characterized in that: It includes a core group, a left head arranged at one end of the core group, a right head arranged at the other end of the core group, and a spacing area between two adjacent cores in the core group. The core group is composed of at least two cores stacked along a direction perpendicular to the partition plate, and the spacing area is the area between adjacent side plates of the two cores; a metal wire cloth is arranged in the spacing area, and spacing seals are arranged around the spacing area to close the area.

2. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The metal wire cloth is laid flat on the side plate layer by layer in the spacing area, and the number of layers is 2-5.

3. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The metal wire cloth is made of aluminum wire or steel wire.

4. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The wire diameter of the metal wire of the metal wire cloth is 0.1-0.3 mm, and the hole diameter is 3-9 mm.

5. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The spacing seal is arranged between the adjacent side plates of the two core bodies.

6. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The spacing seal strip has a flat head on one side and a wedge-shaped head on the other side, and the wedge-shaped side is close to the center of the spacing area.

7. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: An isolation belt is arranged between the spacer seal and the laid metal wire cloth.

8. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 1 is characterized in that: The spacing seal strip is provided with at least one exhaust channel communicating with the interior of the spacing area.

9. The multi-core combined structure of the aluminum plate-fin heat exchanger according to claim 8, characterized in that: The exhaust passage comprises a vent hole arranged on the spacing seal, a vent pipe welded and fixed at the corresponding vent hole, and an elastic cap arranged on the vent pipe.

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