Box-type laminated heat exchanger with reinforcing structure welded on outer side of outer end plate
By welding a thick plate to the outside of the outer end plate of the box-type laminated heat exchanger to reinforce the structure, the problem of outward bulging of the channel sealing end and the outer end plate under working pressure was solved, thereby enhancing the structural stability and leakage prevention capability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 刘启春
- Filing Date
- 2024-11-22
- Publication Date
- 2026-05-22
AI Technical Summary
Under working pressure, the sealing end plane of the existing box-type stacked heat exchanger is prone to bulging outward, which can lead to product deformation and leakage. This problem is more pronounced when the product is wide or the upper and lower outer end plates have large areas.
A reinforcing structure consisting of thick plates welded to the outer side of the outer end plate, including partial and full reinforcement structures, is constructed to prevent the sealing end plane of the channel from bulging outwards. Thick plates are also intermittently welded to the outer sides of the upper and lower outer end plates to prevent the outer end plates from bulging outwards.
It effectively prevents the outward bulging of the channel sealing end plane and the outer end plate, and improves the structural stability and leakage prevention performance of the box-type stacked heat exchanger.
Smart Images
Figure CN122072145A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a heat exchange structure, and more particularly to a box-type stacked heat exchanger with a reinforcing structure welded to the outside of the outer end plate. Background Technology
[0002] The box-type stacked heat exchanger with a reinforcing structure welded to the outside of the outer end plate is composed of multiple box-shaped heat exchange plates with beveled edges stacked sequentially. The beveled edges that are relatively close together form the external brazing seal of each flow channel and form various forms of indirect heat exchange modes. There is a heat exchange structure in the middle of each box-type heat exchange plate that can perform indirect heat exchange. There are through holes at both ends of each box-type heat exchange plate that allow the heat exchange medium to flow. There are pad structures on the extended plane around the through holes at both ends of each box-type heat exchange plate, including high pad structures and low pad structures. There are through holes in these pad structures that allow the heat exchange medium to flow.
[0003] The existing technology of box-type stacked heat exchangers with reinforced structures welded to the outside of the outer end plate has been disclosed in invention patents with patent application numbers "ZL 2013104395763" and "ZL 2019101150846", and in utility model patents with patent numbers "ZL 2021206852388" and "ZL 2022204815887". These disclosed box-type stacked heat exchanger patents all have a defect, that is, the through holes distributed at both ends of each box-type heat exchange plate, including those brazed together with the through holes in various gasket structures, form heat exchange medium channels. At the end of these channels, there is a large area of channel sealing end plane. Under the working pressure inside the box-type stacked heat exchanger, such channel sealing end plane will bulge outward. Once the bulging occurs, it will cause product deformation and leakage.
[0004] In addition, when the product is wide and the area of the upper and lower outer end plates is large, the working pressure inside the box-type stacked heat exchanger will also cause the upper and lower outer end plates of the product to bulge outward. Once the bulging occurs, it will cause product deformation and leakage. Summary of the Invention
[0005] The main objective of this invention is to address the issue of a heat exchange medium channel sealing end with a large planar area, formed by various through holes brazed together, and reinforced by a thick plate welded to the outside of the channel sealing end. This structure can prevent and eliminate the phenomenon of the plane of the heat exchange medium channel sealing end bulging outward due to the internal working pressure of the box-type stacked heat exchanger.
[0006] For products with a wide width and large areas of the upper and lower outer end plates, thick plates are intermittently welded to the outer sides of the upper and lower outer end plates to form local reinforcement structures. This can prevent and eliminate the phenomenon of the upper and lower outer end plates bulging outward due to the internal working pressure of the box-type stacked heat exchanger.
[0007] For ease of assembly, thick reinforcing plates with the same shape and area as the outer sides of the upper and lower outer end plates of the box-type stacked heat exchanger are welded to the outer sides of the upper and lower outer end plates, forming a fully reinforced structure. This not only avoids and eliminates the outward bulging of the sealing end plane of the heat exchange medium channel due to the internal working pressure of the box-type stacked heat exchanger, but also avoids and eliminates the outward bulging of the upper and lower outer end plates of the product.
[0008] The objective of this invention is achieved through the following scheme: a box-type stacked heat exchanger with a reinforcing structure welded to the outside of the outer end plate is composed of multiple box-type heat exchange plates with inclined surfaces on their periphery stacked sequentially, and the inclined surfaces that are relatively close together form the external brazed seal of each flow channel, thus forming various forms of indirect heat exchange modes. Each box-type heat exchange plate has a heat exchange structure in the middle for indirect heat exchange, and each box-type heat exchange plate has through holes at both ends for the flow of the heat exchange medium. A pad structure, including a high pad structure and a low pad structure, is extended in the peripheral plane of the through holes at both ends of each box-type heat exchange plate. These pad structures have through holes for the flow of the heat exchange medium. The key feature is that a reinforcing structure composed of a thick plate is welded to the outside of the outer end plate of the product.
[0009] On the outer side of the outer end plate of the heat exchange medium channel sealing end plane composed of various through holes, a local reinforcement structure composed of thick plates is welded.
[0010] On the outer side of the upper outer end plate of the box-type stacked heat exchanger, there are intermittently arranged thick plate local reinforcement structures welded.
[0011] On the outer side of the lower outer end plate of the box-type stacked heat exchanger, there are intermittently arranged thick plate local reinforcement structures welded.
[0012] The thick plate reinforcement structure welded to the outer side of the upper outer end plate of the box-type stacked heat exchanger has the same shape and area as the outer side of the upper outer end plate of the box-type stacked heat exchanger, thus forming a fully reinforced structure.
[0013] The thick plate reinforcing structure welded to the outer side of the lower outer end plate of the box-type laminated heat exchanger has the same shape and area as the outer side of the lower outer end plate of the box-type laminated heat exchanger, forming a comprehensive reinforcing structure.
[0014] In these various reinforced structures made of thick plates, there are various forms of hole-reducing patterns.
[0015] This invention has the following advantages and positive effects:
[0016] In a box-type laminated heat exchanger with a reinforcing structure welded to the outer side of the outer end plate, the through holes at both ends of the heat exchange plates, including those brazed together from various gasket structures, form the channels for the heat exchange medium. A local reinforcing structure composed of a thick plate is welded to the outer side of the outer end plate at the sealing end plane of these channels. This prevents and avoids any outward bulging of the end plane of the channels formed by the various through holes.
[0017] When the product is wide and the outer area of the upper and lower outer end plates is large, a discontinuous arrangement of thick plate local reinforcement structures is welded to the outer side of the upper and lower outer end plates of the box-type stacked heat exchanger.
[0018] The thick plate reinforcement structure welded to the outer side of the upper and lower outer end plates of the box-type laminated heat exchanger has the same shape and area as the outer side of the upper and lower outer end plates of the box-type laminated heat exchanger, thus forming a fully reinforced structure.
[0019] In these reinforced structures made of thick plates, there are various forms of light-reducing hole patterns, which can reduce the weight of the product. Attached Figure Description
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] Figure 1 A schematic diagram of a box-type stacked heat exchanger where both heat exchange media are internal flow channel wall heat exchangers, and various reinforcing structures are welded to the outside of each thickened outer end plate.
[0022] Figure 2 The outer side of the thickened outer end plate at the top of the box-type stacked heat exchanger is intermittently welded with localized reinforcing structures, and is... Figure 1 3D top view diagram
[0023] Figure 3 One heat exchange medium flows in the inner channel, while the other flows in the open outer channel, forming a cross-shaped interlocking heat exchange structure. At the bottom corresponding to the nozzle, a locally thickened plate is welded to the outer side of the sealing end plate, which is composed of various through-holes forming the channel for the heat exchange medium.
[0024] Figure 4 for Figure 3 Front top view diagram
[0025] Figure 5 Schematic diagram of a box-type stacked heat exchanger with no thickened outer end plate at the bottom and a partially reinforced structure brazed throughout.
[0026] Figure 6 for Figure 5 Front top view diagram Detailed Implementation
[0027] The following description, in conjunction with embodiments and illustrations, provides further details;
[0028] In all the illustrations, labels 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k all represent thickened outer end plates of box-type laminated heat exchangers; labels 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, and 2h all represent nozzles on box-type laminated heat exchangers; labels 3, 3a, 3b, 3c, and 3d all represent box-type heat exchange plates with beveled edges, where label 3b represents a short beveled box-type heat exchange plate, labels 3c and 3d represent long beveled box-type heat exchange plates, and labels 3 and 3a represent conventional beveled box-type heat exchange plates. Additionally, label 3d... Figure 5 The text also states that there is no thickened outer end plate; the thick plate reinforcement structures 5g and 5k are directly brazed to the outer end plate of the box-type laminated heat exchanger, i.e., the long inclined box-shaped heat exchange plate 3d; markings 4, 4a, 4b, and 4c all indicate brazing filler metal sheets that are integrally brazed to the thickened outer end plate and various thick plate reinforcement structures; markings 4d and 4e both indicate brazing filler metal sheets that are directly brazed to the outer end plate of the box-type laminated heat exchanger, i.e., the long inclined box-shaped heat exchange plate 3d, and the thick plate reinforcement structures 5g and 5k; markings 5, 5a, 5b, 5c, 5d, 5e, 5f, and 5g... 5h, 5j, and 5k all represent various thick plate reinforcement structures welded to the box-type laminated heat exchanger. 5b indicates a fully reinforced thick plate structure, while the remaining markings 5, 5a, 5c, 5d, 5e, 5f, 5g, 5h, 5j, and 5k indicate locally reinforced thick plate structures. Mark 6 indicates a heat exchange structure where heat exchange medium A undergoes indirect heat exchange within the box-type laminated heat exchanger. Marks 7 and 7a indicate brazing filler metal pieces located at the bottom of the nozzle, which braze the nozzle to the entire box-type laminated heat exchanger. Mark 8 indicates that all heat exchange media... In the box-type stacked heat exchanger, heat exchange is carried out through the walls, and the heat exchange medium channels are formed by the through holes at both ends of the heat exchange plates and the gaskets 10 and 10a. The markings 9, 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h all indicate the welds and weld cross-sections using the fusion welding process. The markings 10 and 10a both indicate that all heat exchange media undergo indirect heat exchange inside the box-type stacked heat exchanger, as well as the gaskets located around the corner holes at both ends of the box-type heat exchange plates. The marking 11 indicates the heat exchange structure in which heat exchange medium B undergoes indirect heat exchange inside the box-type stacked heat exchanger. Identifiers 12 and 12a both indicate high-plate structures; Identifier 13 indicates a heat exchange structure in a box-type stacked heat exchanger with a cross-shaped heat exchange mode, where the heat exchange medium C flows in the outer channel and performs indirect heat exchange; Identifier 14 indicates a heat exchange medium channel formed by the through holes at both ends of all heat exchange plates, high-plate structures 12 and 12a, and low-plate structure 15; Identifier 15 is a low-plate structure; Identifier 16 indicates a heat exchange structure in a box-type stacked heat exchanger with a cross-shaped heat exchange mode, where the heat exchange medium D flows in the inner channel and performs indirect heat exchange.
[0029] exist Figure 1 and Figure 2 The image shows two heat exchange modes where both heat exchange media are internally partitioned, and also demonstrates the fully reinforced thick plate structure designated 5b. The shape and area of this fully reinforced thick plate structure 5b are similar to... Figure 1 and Figure 2 The thickened outer end plates 1a and 1c of the box-type laminated heat exchanger have the same shape and area. Furthermore, it is shown that the fully reinforced structure 5b is integrally brazed to the thickened outer end plates 1a and 1c of the bottom of the box-type laminated heat exchanger via brazing filler metal 4a. Simultaneously, after the fully reinforced structure 5b is integrally brazed to the thickened outer end plates 1a and 1c of the bottom of the box-type laminated heat exchanger, fusion welding processes 9 and 9a are used to fusion weld the periphery of the fully reinforced structure 5b to the thickened outer end plates 1a and 1c of the box-type laminated heat exchanger, thereby further strengthening the strength between the fully reinforced structure 5b and the entire thickened outer end plates 1a and 1c of the box-type laminated heat exchanger.
[0030] Figure 1 and Figure 2 The markings 5, 5a, 5c, 5d, and 5e all indicate that these locally thickened plate reinforcement structures exist within the thickened outer end plates 1, 1b, and 1d, and these structures are distributed in a discontinuous pattern. Of course, markings 5, 5a, 5c, 5d, and 5e can also replace the fully reinforced structure 5b, which exists on the outside of the thickened outer end plates 1a and 1c.
[0031] exist Figure 1 and Figure 2 In the middle, between markings 5, 5a, and 5e and the thickened outer end plates 1, 1b, and 1d, there are brazing filler metal pieces 4 and 4b, which allow markings 5, 5a, and 5e to be brazed together with the thickened outer end plates 1, 1b, and 1d. Additionally, Figure 2 The 5c and 5d plates in the middle section can be directly welded together with the thickened outer end plate 1d by fusion welding 9b and 9c.
[0032] Figure 1 and Figure 2 It also indicates that all nozzles 2, 2a, and 2b are on the thickened outer end plates 1, 1b, and 1d. Furthermore, it shows that the bottoms of nozzles 2, 2a, and 2b are integrally brazed to the thickened outer end plates 1, 1b, and 1d of the box-type laminated heat exchanger via brazing filler metal 7. Of course, the bottoms of nozzles 2, 2a, and 2b can also be directly fused to the thickened outer end plates 1, 1b, and 1d of the box-type laminated heat exchanger, in a similar manner. Figure 3 The nozzle 2c is directly welded to the thickened outer end plate 1f using a fusion welding method similar to fusion welding 9e. Alternatively, it can be considered that all nozzles can be located on the outside of the thickened outer end plates 1a and 1c, and the fully reinforced structure 5b can be located within the thickened outer end plates 1, 1b, and 1d.
[0033] exist Figure 3 and Figure 4The diagram shows that the heat exchange structure 16 in the inner channel and the heat exchange structure 13 in the outer channel form a cross-shaped heat exchange mode. The heat exchange medium D and the heat exchange structure 16 are located in the inner channel, while the heat exchange medium C and the heat exchange structure 13 are located in the outer channel. The heat exchange media D and C are in a cross-shaped inter-wall heat exchange configuration.
[0034] At the same time Figure 3 and Figure 4 The diagram also shows that after the local reinforcement structures 5f, 5g, and 5h are connected to the thickened outer end plates 1e, 1f, and 1g with brazing filler metal sheets 4c, they are brazed together as a whole. Then, the periphery of the local reinforcement structures 5f, 5g, and 5h is fused together with the thickened outer end plates 1e, 1f, and 1g using fusion welding processes 9d, 9e, and 9g. This further strengthens the strength between the local reinforcement structures 5f, 5g, and 5h and the thickened outer end plates 1e, 1f, and 1g, and further strengthens the reinforcement structure inside the box-type stacked heat exchanger, which is formed by the through holes at both ends of the heat exchange plates and the high pads 12 and 12a and the low pads 15 forming the end plane of the heat exchange medium channel 14.
[0035] exist Figure 5 The diagram shows that the local reinforcement structures 5k and 5j are directly brazed to the bottom of the long inclined box-shaped heat exchange plate 3d through brazing filler metal pieces 4e and 4d. Here, the long inclined box-shaped heat exchange plate 3d can also serve as the outer end plate of the box-type stacked heat exchanger, thereby reducing the need for a thickened outer end plate and reducing product costs.
[0036] It can also be considered that various thick plate reinforcement structures 5, 5a, 5c, 5d, 5e, 5f, 5g, 5h, 5j, and 5k do not require thickening of the outer end plates 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, and 1k. Alternatively, brazing filler metal sheets 4, 4a, 4b, and 4c can be directly and integrally brazed onto the heat exchange plates 3, 3a, 3b, 3c, and 3d of the box-type stacked heat exchanger.
[0037] Figure 1 , 2 1, 2, 3, 4, 5, and 6 indicate that box-type laminated heat exchangers with different structures can all have various thick plate reinforcement structures on the outer side of the channel end plane where the heat exchange medium is composed of various through holes, as well as on the outer side of the outer end plate. These structures can be fully reinforced or have various local reinforcement structures.
Claims
1. A box-type stacked heat exchanger with a reinforcing structure welded to the outside of the outer end plate is composed of multiple box-shaped heat exchange plates with beveled edges stacked sequentially. The beveled edges, which are in close contact with each other, form an external brazed seal for each flow channel, creating various forms of indirect heat exchange modes. Each box-type heat exchange plate has a heat exchange structure in the middle for indirect heat exchange, and each box-type heat exchange plate has through holes at both ends for the flow of the heat exchange medium. A pad structure, including high pad structures and low pad structures, extends from the periphery of the through holes at both ends of each box-type heat exchange plate. These pad structures have through holes for the flow of the heat exchange medium. The characteristic feature is that… A reinforcing structure made of thick plates is welded to the outside of the outer end plate of the product.
2. The novel box-type stacked heat exchanger according to claim 1, characterized in that, On the outer side of the outer end plate of the heat exchange medium channel sealing end plane composed of various through holes, a local reinforcement structure composed of thick plates is welded.
3. The novel box-type stacked heat exchanger according to claim 1, characterized in that, On the outer side of the upper outer end plate of the box-type stacked heat exchanger, there are intermittently arranged thick plate local reinforcement structures welded.
4. The novel box-type stacked heat exchanger according to claim 1, characterized in that, On the outer side of the lower outer end plate of the box-type stacked heat exchanger, there are intermittently arranged thick plate local reinforcement structures welded.
5. The novel box-type stacked heat exchanger according to claim 1, characterized in that, The thick plate reinforcement structure welded to the outer side of the upper outer end plate of the box-type stacked heat exchanger has the same shape and area as the outer side of the upper outer end plate of the box-type stacked heat exchanger, thus forming a fully reinforced structure.
6. The novel box-type stacked heat exchanger according to claim 1, characterized in that, The thick plate reinforcement structure welded to the outer side of the lower outer end plate of the box-type stacked heat exchanger has the same shape and area as the outer side of the lower outer end plate of the box-type stacked heat exchanger, thus forming a fully reinforced structure.
7. The novel box-type stacked heat exchanger according to claim 1, characterized in that, In these various reinforced structures made of thick plates, there are various forms of hole-reducing patterns.