End socket structure for aluminum plate-fin heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and provides an end socket structure for an aluminum plate-fin heat exchanger, which comprises an end socket body which is obtained by spot welding and splicing two plates with the same size into a corresponding size and sequentially pre-cutting, rolling and re-cutting; the side plates are of an arc-shaped structure and are connected with the front side and the rear side of the sealing head body in a sealing and welding mode to form a shell with a rectangular hole in the bottom and a round hole in the top; the connecting pipe is inserted and hermetically welded with the round hole in the top of the shell; wherein the pre-cut and re-cut part of the seal head body is a part of plate where a spot welding seam is located, the rolling direction is perpendicular to the spot welding seam, and the diameter of the connecting pipe coincides with that of the spot welding seam. The seal head body formed by splicing the two plates with the same size in a spot welding mode and integrally rolling the two plates can finally avoid a longitudinal welding seam, so that the working procedures such as B-type welding joints and subsequent ray inspection are omitted, the production efficiency of the seal head is improved, meanwhile, the welding seam formed by spot welding of the two plates is exactly cut through the open hole of the connecting pipe, and the material utilization rate is effectively improved.

Description

Technical Field

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

[0002] The head of an aluminum plate-fin heat exchanger is an important part thereof. Besides converging the medium, connecting the core body and the process pipeline, the most important function of the head is to jointly guide the fluid flow direction with the guide vane, and at the same time play an important role in the fluid distribution after the fluid enters the inside of the plate-fin heat exchanger core body.

[0003] Such as Figure 1 and Figure 2 shown, the head is usually welded by parts such as a nozzle 1´, a head body 2´ and a pair of side plates 3´. After the head body 2´ and a pair of side plates 3´ are unfolded, they are four arc plates.

[0004] For the production of the head body 2´, it is generally divided into pipe splitting and plate rolling. Using a plate to roll into a head body is affected by factors such as the inner diameter of the rolled plate, the length of the rolled plate, and the thickness of the rolled plate. Therefore, some large-sized head bodies 2´ may be spliced by two or more plates.

[0005] Currently, a large-sized head body 2´ is obtained by continuously welding and splicing a large and a small plate as shown in Figure 3 to the corresponding size, feeding it into a rolling machine for rolling and cutting. However, this splicing results in an inevitable longitudinal weld 4´ on the finally formed head, thereby increasing the B-class welding joints of the head and the subsequent radiographic inspection requirements, and reducing the production efficiency of the head. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a head structure for an aluminum plate-fin heat exchanger to solve the problems that the existing head body has splicing welds, which increases the B-class welding joints of the head and the subsequent radiographic inspection requirements, and reduces the production efficiency of the head.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A head structure for an aluminum plate-fin heat exchanger, comprising:

[0009] A head body, which is spot-welded and spliced from two plates of the same size to the corresponding size, and is obtained by pre-cutting, rolling and re-cutting in sequence;

[0010] A pair of side plates, which are in an arc structure, are hermetically welded to the front and rear sides of the head body to form a shell with a rectangular hole at the bottom and a circular hole at the top; and

[0011] A nozzle, which is inserted into and hermetically welded to the circular hole at the top of the shell;

[0012] Among them, the parts of the head body removed by pre-cutting and re-cutting are the part of the sheet where the spot weld seams are located, the rolling direction is perpendicular to the spot weld seams, and the diameter of the nozzle coincides with the spot weld seams.

[0013] In an embodiment disclosed in the present application, a pair of the side plates are obtained by rolling another sheet into a semicircle and then cutting it in half.

[0014] In an embodiment disclosed in the present application, the thickness of the sheets used for the head body and a pair of side plates is 14 mm, and the inner radius after bending is 753 mm for both.

[0015] In an embodiment disclosed in the present application, the sheets used for the head body and a pair of side plates are both aluminum sheets.

[0016] In an embodiment disclosed in the present application, the inner end of the nozzle extends 3 mm into the circular hole at the top of the shell to form a rounded corner after welding.

[0017] In an embodiment disclosed in the present application, the size of the rounded corner is 3 mm.

[0018] In an embodiment disclosed in the present application, the inner diameter of the nozzle is 900 mm.

[0019] In an embodiment disclosed in the present application, the nozzle is made of an aluminum pipe with a wall thickness of 12 mm.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The head body integrally rolled by spot welding and splicing two sheets with the same size can finally avoid a longitudinal weld, thus saving the B-class welding joint and subsequent ray inspection and other processes, improving the production efficiency of the head, and at the same time, the opening of the nozzle can just cut the weld of the spot welding of the two sheets, effectively improving the material utilization rate. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a front view structural schematic diagram of an existing head;

[0024] Figure 2 It is a top view structural schematic diagram of an existing head;

[0025] Figure 3 Schematic diagram of the splicing structure of the plate used for the existing head body;

[0026] Figure 4 Schematic three - dimensional structure diagram of the present utility model;

[0027] Figure 5 Schematic top - view structure diagram of the present utility model;

[0028] Figure 6 Schematic diagram of the splicing structure of the plate used for the head body in the present utility model;

[0029] Figure 7 Schematic three - dimensional structure diagram of the head body in the present utility model. Detailed implementation manners

[0030] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it cannot be understood as a limitation to the present utility model.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection or an indirect connection through an intermediate medium, and may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described hereinafter. Of course, they are merely examples and are not intended to limit the present utility model.

[0036] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0037] See Figures 4 to 7 As shown, the present utility model provides a head structure for an aluminum plate-fin heat exchanger, including:

[0038] A head body 1, which is obtained by spot welding and splicing two plates of the same size into the corresponding size, and then successively through pre-cutting, rolling and re-cutting;

[0039] A pair of side plates 2, in an arc structure, are hermetically welded to the front and rear sides of the head body 1 to form a shell with a rectangular hole at the bottom and a round hole at the top; and

[0040] A nozzle 3, which is inserted into the round hole at the top of the shell and hermetically welded;

[0041] Wherein, the parts of the head body 1 removed by pre-cutting and re-cutting are the parts of the plates where the spot welds are located, the rolling direction is perpendicular to the spot welds, and the diameter of the nozzle 3 coincides with the spot welds.

[0042] Specifically, see Figure 6As shown, two plates with dimensions of ~1193.2 mm * 1770 mm are cut from a plate with dimensions of 1500 mm * 6000 mm. Then, the long sides (1770 mm) of these two plates are spliced together by spot welding to form an integral part corresponding to the size of the unfolded head body 1 (where the long side corresponds to the straight bottom edge of the head body 1). After drawing the cutting line for blanking with a red marker pen, pre-cutting is carried out to remove the remaining part of the plate except for the part of the plate where the middle area of the spot welding seam is located ( Figure 6 the area enclosed by the single dash-dot line and several solid arcs in Figure 6 ), and then the pre-cut plate is fed into a rolling machine and rolled in the Figure 6 shown left-right direction (the vertical direction of the spot welding seam). After rolling, due to the insertion of the nozzle 3 in the form that its diameter passes through the spot welding seam, the plate needs to be re-cut to cut off the longitudinal spot welding seam ( Figure 6 schematically shown by three dash-dot lines in Figure 6 ), and finally the two areas enclosed by the thick solid lines in Figure 6 remain (the longitudinal weld shown by the dotted line in this figure no longer exists due to the integral forming of the head body 1), thus forming the head body 1 without splicing welds (see Figure 7 for details). That is to say, the head body 1 formed by spot welding and integrally rolling two plates with the same size can finally avoid a longitudinal weld, thus saving the B-class welding joint and subsequent radiographic inspection and other processes, improving the production efficiency of the head, and at the same time, the opening of the nozzle 3 just cuts the weld of the two plates spot-welded, effectively improving the material utilization rate.

[0043] A pair of side plates 2 are obtained by rolling another plate into a semi-circle and then cutting it in half. Specifically, similar to the manufacturing steps of the head body 1, first, the cutting line for blanking is drawn on this plate with a red marker pen, and then pre-cutting is carried out to obtain a plate corresponding to the size of a pair of side plates 2 when unfolded and without forming a middle opening. Then, it is fed into a rolling machine and rolled into an arc structure, and then spot-welded to the head body 1. Finally, the circular hole part corresponding to the nozzle 3 is cut out.

[0044] The thickness of the plates used for the head body 1 and a pair of side plates 2 is 14 mm, and their inner radii after bending are both 753 mm.

[0045] In this embodiment, the plates used for the head body 1 and a pair of side plates 2 are both aluminum plates. Aluminum plates have higher heat exchange efficiency, lower density, and lighter texture.

[0046] The inner end of the nozzle 3 extends 3 mm into the circular hole at the top of the shell for chamfering after welding. In this embodiment, the chamfer size is 3 mm.

[0047] The inner diameter of the nozzle 3 is 900 mm. In this embodiment, the nozzle 3 is made of an aluminum pipe with a wall thickness of 12 mm.

[0048] The above embodiments are only the preferred embodiments of the present invention, and do not limit the technical solutions of the present invention. Any technical solutions that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the present invention.

Claims

1. A head structure for an aluminum plate-fin heat exchanger, characterized in that: include: The head body is obtained by spot welding two plates of the same size into corresponding sizes, and then pre-cutting, rolling and re-cutting in sequence; A pair of side plates, which are arc-shaped and sealed and welded to the front and rear sides of the head body to form a shell with a rectangular hole at the bottom and a circular hole at the top; and A pipe connected to the round hole on the top of the shell by plugging and sealing welding; Among them, the part of the plate where the spot welding seam is located is removed by pre-cutting and re-cutting of the head body, the rolling direction is perpendicular to the spot welding seam, and the diameter of the connecting pipe coincides with the spot welding seam.

2. The head structure for an aluminum plate-fin heat exchanger according to claim 1, characterized in that: The pair of side panels are obtained by rolling another plate into a semicircle and then cutting it into two halves.

3. The head structure for an aluminum plate-fin heat exchanger according to claim 1 or 2, characterized in that: The thickness of the plates used for the head body and the pair of side plates is 14 mm, and the inner radius after bending is 753 mm.

4. The head structure for an aluminum plate-fin heat exchanger according to claim 3, characterized in that: The plates used for the head body and a pair of side plates are all aluminum plates.

5. The head structure for an aluminum plate-fin heat exchanger according to claim 1 or 4, characterized in that: The inner end of the pipe extends into the circular hole at the top of the shell by 3 mm so as to round the corners after welding.

6. The head structure for an aluminum plate-fin heat exchanger according to claim 5, characterized in that: The fillet size is 3 mm.

7. The head structure for an aluminum plate-fin heat exchanger according to claim 5, characterized in that: The inner diameter of the connecting pipe is 900 mm.

8. The head structure for an aluminum plate-fin heat exchanger according to claim 1 or 7, characterized in that: The connecting pipe is made of an aluminum tube with a wall thickness of 12 mm.

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