Brazed heat exchanger easy to stack

Abstract

The utility model discloses a brazing type heat exchanger easy to stack, and relates to the technical field of heat exchangers. The device comprises an upper end plate, a lower end plate, a plurality of plate sets, four end pipe mechanisms and four lower supporting pipes, corner holes are formed in the four corners of the plate sets and the four corners of the upper end plate, each end pipe mechanism comprises an inner pipe body and a locking sleeve, one end of each inner pipe body is connected with an end pipe section through a necking-down section, the outer diameter of each necking-down section is smaller than the outer diameter of each end pipe section and the outer diameter of each inner pipe body, and the locking sleeves are connected with the end pipe sections. A guide slope section is formed at the joint of the end pipe section and the necking section. Through the design of the end pipe mechanism, after the inner pipe body is installed on the lower end plate, the inner pipe body and the corner holes are matched to be used for positioning and guiding the plate sheet set and the upper end plate, stacking and positioning of the plate sheet set and the upper end plate are facilitated, stacking of the heat exchanger is facilitated, and the heat exchanger is convenient to use. And meanwhile, through the design of the locking sleeve, the guide groove and the guide slope section, the inner pipe body and the lower supporting pipe can be locked, so that pre-fixing of the whole heat exchanger is achieved, and the subsequent brazing procedure is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and particularly relates to a brazed heat exchanger which is easy to stack. Background Art

[0002] For a brazed plate heat exchanger, it is composed of an upper end plate, a lower end plate and a plate pack. The plate pack needs to be stacked between the upper end plate and the lower end plate, and then brazed and fixed at the connection points at various positions. Since the required number of plate packs is large and the thickness is thin and easy to deform, it is not conducive to accurate positioning during the stacking process, not conducive to operation, and will affect the stacking efficiency. Similarly, it may cause subsequent brazing effects and stability. Content of the Utility Model

[0003] The purpose of the utility model is to provide a brazed heat exchanger which is easy to stack. After the inner tube body is installed on the lower end plate through the design of the end tube mechanism, the cooperation between the inner tube body and the corner holes can be used for the positioning and guiding of the plate pack and the upper end plate, facilitating the stacking and positioning of the plate pack and the upper end plate, being conducive to the stacking of the heat exchanger. At the same time, through the design of the locking sleeve, the guide bevel groove and the guide bevel section, the inner tube body and the lower stay tube can be locked, so as to realize the pre-fixing of the whole heat exchanger, being conducive to the subsequent brazing process.

[0004] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0005] The utility model is a brazed heat exchanger which is easy to stack, including an upper end plate, a lower end plate, a plurality of plate packs, four end tube mechanisms and four lower stay tubes. Corner holes are provided at the four corners of the plate pack and the upper end plate;

[0006] The end tube mechanism includes an inner tube body and a locking sleeve;

[0007] One end of the inner tube body is connected with an end tube section through a necking section. The outer diameter of the necking section is smaller than the outer diameters of the end tube section and the inner tube body. A guide bevel section is formed at the connection between the end tube section and the necking section. A plurality of strip-shaped openings are provided on the circumferential side of the inner tube body;

[0008] The lower stay tube is fixed on the outer surface of the upper end plate and is concentric with the corner hole. A lower gasket is provided at one end of the lower stay tube away from the upper end plate;

[0009] One end of the inner tube body away from the end tube section is fixed to the lower end plate. A plurality of the plate packs and the upper end plate are sequentially stacked on the upper surface of the lower end plate. The inner tube body penetrates through the corner holes of the plate pack and the lower stay tube of the upper end plate;

[0010] The locking sleeve is composed of a set of symmetrically arranged half sleeves, and the two half sleeves are connected to each other through fasteners;

[0011] The inner edge at the top end of the locking sleeve is provided with a guide bevel groove, and the slope of the guide bevel groove is consistent with the slope of the guide slope section. The bottom surface of the locking sleeve is arranged on the upper surface of the lower cushion ring through a gasket, and the guide bevel groove at the top end of the locking sleeve fits with the guide slope section.

[0012] Further, the strip-shaped opening is parallel to the length direction of the inner pipe body, and both ends of the strip-shaped opening are located between the upper end plate and the lower end plate.

[0013] Further, the guide slope section is a tapered sleeve structure, and the small end of the guide slope section faces the necking section.

[0014] Further, the outer diameter of the end pipe section is smaller than the outer diameter of the inner pipe body, and the inner diameters of the angular holes on the plate fin group and the upper end plate are both consistent with the outer diameter of the inner pipe body.

[0015] Further, a support edge is provided at one end of the lower stay tube away from the lower cushion ring, and the lower stay tube is fixed to the upper end plate through the support edge.

[0016] Further, strengthening parts are provided between the support edge and the lower stay tube and between the lower cushion ring and the lower stay tube, and the cross-section of the strengthening part is a right trapezoid structure or a right triangle structure.

[0017] The utility model has the following beneficial effects:

[0018] Through the design of the end pipe mechanism, after the inner pipe body is installed on the lower end plate, the cooperation between the inner pipe body and the angular holes can be used for the positioning and guiding of the plate fin group and the upper end plate, which is convenient for the stacking and positioning of the plate fin group and the upper end plate, and is beneficial to the stacking of the heat exchanger. At the same time, through the design of the locking sleeve, the guide bevel groove and the guide slope section, the inner pipe body and the lower stay tube can be locked, so as to realize the pre-fixing of the whole heat exchanger, which is beneficial to the subsequent brazing process.

[0019] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural diagram of a brazed heat exchanger with easy stacking of the present utility model;

[0022] Figure 2 is Figure 1 a partial enlarged view of part A in

[0023] Figure 3 It is a structural schematic diagram of the lower support pipe, the inner pipe body and the locking sleeve;

[0024] Figure 4 is Figure 3 The structural schematic diagram after partial cross-section removal in

[0025] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0026] 1 - upper end plate, 2 - lower end plate, 3 - plate fin group, 4 - lower support pipe, 5 - inner pipe body, 6 - locking sleeve, 301 - corner hole, 401 - lower cushion ring, 402 - support edge, 501 - necking section, 502 - end pipe section, 503 - guide slope section, 504 - strip-shaped opening, 601 - half sleeve body, 602 - guide bevel opening, 603 - gasket. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Please refer to Figures 1-4 As shown, the present invention is a brazed heat exchanger that is easy to stack, including an upper end plate 1, a lower end plate 2, a plurality of plate fin groups 3, four end pipe mechanisms and four lower support pipes 4. Corner holes 301 are provided at the four corners of the plate fin group 3 and the upper end plate 1;

[0029] The end pipe mechanism includes an inner pipe body 5 and a locking sleeve 6;

[0030] One end of the inner pipe body 5 is connected with an end pipe section 502 through a necking section 501. The outer diameter of the necking section 501 is smaller than the outer diameters of the end pipe section 502 and the inner pipe body 5. A guide slope section 503 is formed at the connection between the end pipe section 502 and the necking section 501. A plurality of strip-shaped openings 504 are provided on the circumferential side of the inner pipe body 5;

[0031] The lower support pipe 4 is fixed on the outer surface of the upper end plate 1 and is concentric with the corner hole 301. A lower cushion ring 401 is provided at one end of the lower support pipe 4 away from the upper end plate 1;

[0032] One end of the inner pipe body 5 away from the end pipe section 502 is fixed to the lower end plate 2. A plurality of plate fin groups 3 and the upper end plate 1 are sequentially stacked on the upper surface of the lower end plate 2. The inner pipe body 5 penetrates through the corner holes 301 of the plate fin group 3 and the lower support pipes 4 of the upper end plate 1;

[0033] The locking sleeve 6 is composed of a group of symmetrically arranged half sleeve bodies 601, and the two half sleeve bodies 601 are connected to each other through fasteners;

[0034] At the inner edge of the top end of the locking sleeve 6, a guiding bevel groove 602 is provided. The slope of the guiding bevel groove 602 is the same as that of the guiding slope section 503. The bottom surface of the locking sleeve 6 is arranged on the upper surface of the lower cushion ring 401 through a gasket 603, and the guiding bevel groove 602 at the top end of the locking sleeve 6 fits with the guiding slope section 503.

[0035] Among them, as Figure 1 and Figures 3-4 shown, the strip-shaped opening 504 is parallel to the length direction of the inner pipe body 5, and both ends of the strip-shaped opening 504 are located between the upper end plate 1 and the lower end plate 2.

[0036] Among them, as Figures 1-2 and Figure 4 shown, the guiding slope section 503 is a tapered sleeve structure, and the small-end of the guiding slope section 503 faces the necking section 501.

[0037] Among them, as Figures 1-2 and Figure 4 shown, the outer diameter of the end pipe section 502 is smaller than the outer diameter of the inner pipe body 5, and the inner diameters of the angular holes 301 on the plate fin group 3 and the upper end plate 1 are both the same as the outer diameter of the inner pipe body 5.

[0038] Among them, as Figures 1-4 shown, at one end of the lower stay tube 4 away from the lower cushion ring 401, a supporting edge 402 is provided, and the lower stay tube 4 is fixed to the upper end plate 1 through the supporting edge 402.

[0039] Among them, as Figures 1-4 shown, a reinforcing part is provided between the supporting edge 402 and the lower stay tube 4 and between the lower cushion ring 401 and the lower stay tube 4, and the cross-section of the reinforcing part is a right trapezoid structure or a right triangle structure.

[0040] The working principle of the present utility model is as follows: The inner pipe body 5 is installed on the lower end plate 2. Through the positioning of the inner pipe body 5, the positioning and guiding during the stacking of the plate fin group 3 can be carried out. After the plate fin group 3 is stacked, the upper end plate 1 is stacked again, and finally the locking sleeve 6 is installed to realize the locking between the inner pipe body 5 and the lower stay tube 4.

[0041] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A brazed heat exchanger that is easy to stack, comprising an upper end plate (1), a lower end plate (2) and a plurality of plate groups (3). Angle holes (301) are provided at the four corners of the plate groups (3) and the upper end plate (1). It is characterized in that: It further includes four end pipe mechanisms and four lower support pipes (4); The end pipe mechanism includes an inner pipe body (5) and a locking sleeve (6); One end of the inner pipe body (5) is connected with an end pipe section (502) through a necking section (501). The outer diameter of the necking section (501) is smaller than the outer diameters of the end pipe section (502) and the inner pipe body (5). A guide slope section (503) is formed at the connection between the end pipe section (502) and the necking section (501). A plurality of strip-shaped openings (504) are provided on the circumferential side surface of the inner pipe body (5); The lower support pipe (4) is fixed on the outer surface of the upper end plate (1) and is concentric with the corner hole (301). A lower cushion ring (401) is provided at one end of the lower support pipe (4) away from the upper end plate (1); One end of the inner pipe body (5) away from the end pipe section (502) is fixed to the lower end plate (2). A plurality of the plate groups (3) and the upper end plate (1) are sequentially stacked on the upper surface of the lower end plate (2). The inner pipe body (5) penetrates through the corner holes (301) of the plate groups (3) and the lower support pipes (4) of the upper end plate (1); The locking sleeve (6) is composed of a group of symmetrically arranged half sleeves (601). The two half sleeves (601) are connected to each other through fasteners; A guide slope opening (602) is provided at the inner edge of the top end of the locking sleeve (6). The slope of the guide slope opening (602) is the same as the slope of the guide slope section (503). The bottom surface of the locking sleeve (6) is arranged on the upper surface of the lower cushion ring (401) through a gasket (603). The guide slope opening (602) at the top end of the locking sleeve (6) fits with the guide slope section (503); 2. The brazed heat exchanger according to claim 1, which is easy to stack, is characterized in that, The strip-shaped openings (504) are parallel to the length direction of the inner pipe body (5). Both ends of the strip-shaped openings (504) are located between the upper end plate (1) and the lower end plate (2); 3. The brazed heat exchanger that is easy to stack as claimed in claim 1, wherein The guide slope section (503) is a conical sleeve structure. The small end of the guide slope section (503) faces the necking section (501); 4. The brazed heat exchanger capable of being easily stacked according to claim 1, wherein, The outer diameter of the end pipe section (502) is smaller than the outer diameter of the inner pipe body (5). The inner diameters of the corner holes (301) on the plate groups (3) and the upper end plate (1) are both the same as the outer diameter of the inner pipe body (5); 5. The brazed heat exchanger according to claim 1, which is easy to stack, is characterized in that, A support edge (402) is provided at one end of the lower support pipe (4) away from the lower cushion ring (401). The lower support pipe (4) is fixed to the upper end plate (1) through the support edge (402); 6. The brazed heat exchanger according to claim 5, wherein Reinforcing parts are provided between the support edge (402) and the lower support pipe (4) and between the lower cushion ring (401) and the lower support pipe (4). The cross section of the reinforcing part is a right trapezoid structure or a right triangle structure.

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