Sealing strip for plate-fin heat exchanger

Abstract

The utility model discloses a sealing strip for a plate-fin heat exchanger, which relates to the technical field of plate-fin heat exchangers and comprises a sealing strip body. The substrate comprises a first surface and a second surface; the first surface is located on the upper surface of the seal body; the first surface is in fit connection with an upper-layer partition plate of the seal body; the second surface is located on the lower surface of the seal body; the second surface is in fit connection with a lower-layer partition plate of the seal body; embedding areas are arranged at the two ends of the first surface in the length direction of the sealing strip body; the embedding area is provided with a first vertical plate and a second vertical plate; the first vertical plate is fixedly arranged in the length direction of the sealing strip body. The second vertical plate is fixedly arranged in the width direction of the sealing strip body. The first surface and the second surface are symmetrically arranged up and down. According to the sealing strip for the plate-fin heat exchanger, the transverse first vertical plate and the longitudinal second vertical plate are arranged, the contact area of the sealing strip and a partition plate is increased, meanwhile, brazing filler metal can be arranged more conveniently, and the brazing uniformity is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of plate-fin heat exchanger technology, and in particular to a sealing strip for plate-fin heat exchangers. Background Technology

[0002] The core component of a plate-fin heat exchanger is the plate bundle, which consists of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between adjacent baffles to form a sandwich layer, called a channel. These sandwich layers are stacked according to different fluid flow patterns and brazed together to form the plate bundle. The seals are long, strip-shaped structural components located on both sides of the plate bundle, serving to provide structural support and prevent leakage.

[0003] Chinese utility model patent application number 202120676350.5 discloses a tightly connected seal. This patent increases the contact area with the partition and improves the connection stability by setting a wave structure on the upper and lower sides. However, the seal and the partition need to be filled with brazing filler metal. The wave-shaped curved contact surface is relatively complex, and it is impossible to achieve uniform distribution of either foil brazing filler metal or paste brazing filler metal, resulting in low welding strength. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a sealing strip for plate-fin heat exchangers. By setting a first vertical plate in the horizontal direction and a second vertical plate in the vertical direction, the contact area between the sealing strip and the partition plate is increased, and the brazing filler metal can be set more conveniently, which effectively improves the uniformity of brazing.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a sealing strip for a plate-fin heat exchanger, comprising a sealing strip body; the sealing strip body includes a first surface and a second surface; the first surface is located on the upper surface of the sealing strip body; the first surface is bonded to the upper partition of the sealing strip body; the second surface is located on the lower surface of the sealing strip body; the second surface is bonded to the lower partition of the sealing strip body; the first surface has fitting areas at both ends along the length direction of the sealing strip body; the fitting areas have a first upright plate and a second upright plate; the first upright plate is fixedly arranged along the length direction of the sealing strip body; the second upright plate is fixedly arranged along the width direction of the sealing strip body; the first surface and the second surface are symmetrically arranged vertically.

[0007] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has a first through groove on the upper surface of the first vertical plate; the first through groove is arranged along the length direction of the sealing strip body; a second through groove is provided on the upper surface of the second vertical plate; the second through groove is arranged along the width direction of the sealing strip body.

[0008] The sealing strip for plate-fin heat exchangers provided by this utility model preferably includes a first vertical plate further comprising a plurality of first supports; the first supports are disposed at the bottom of the first through groove along the width direction of the first through groove; the plurality of first supports are spaced apart along the length direction of the first through groove; the second vertical plate further comprises a plurality of second supports; the second supports are disposed at the bottom of the second through groove along the width direction of the second through groove; the plurality of second supports are spaced apart along the length direction of the second through groove; the first supports and the second supports have the same structure.

[0009] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has an arc-shaped surface on the top of both the first and second frames.

[0010] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has a sandwiched area on the first surface; the sandwiched area is located between the interlocking areas at both ends of the first surface; a metal mesh plate is laid in the sandwiched area; a surrounding plate is provided on the periphery of the metal mesh plate; the surrounding plate is set on the first surface.

[0011] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has a pad between the first surface and the metal mesh plate; the upper surface of the pad is provided with a plurality of protrusions; the protrusions are hemispherical structures.

[0012] The sealing strip for plate-fin heat exchangers provided by this utility model preferably has raised dots made of ceramic material.

[0013] The above technical solution has the following advantages or beneficial effects: This utility model provides a sealing strip for plate-fin heat exchangers, relating to the field of plate-fin heat exchanger technology. It includes a sealing strip body; the sealing strip body includes a first surface and a second surface; the first surface is located on the upper surface of the sealing strip body; the first surface is bonded to the upper partition of the sealing strip body; the second surface is located on the lower surface of the sealing strip body; the second surface is bonded to the lower partition of the sealing strip body; the first surface has fitting areas at both ends along the length direction of the sealing strip body; the fitting areas have a first vertical plate and a second vertical plate; the first vertical plate is fixedly arranged along the length direction of the sealing strip body; the second vertical plate is fixedly arranged along the width direction of the sealing strip body; the first surface and the second surface are symmetrically arranged vertically. This utility model provides a sealing strip for plate-fin heat exchangers, which, by setting a transverse first vertical plate and a longitudinal second vertical plate, increases the contact area between the sealing strip and the partition, while also facilitating the placement of brazing filler metal, effectively improving the uniformity of brazing. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0015] Figure 1This is an overall structural diagram of a sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of the present invention;

[0016] Figure 2 This is a structural diagram of the fitting area of ​​a seal for a plate-fin heat exchanger provided in Embodiment 1 of this utility model;

[0017] Figure 3 This is a structural diagram of the first frame of a sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of the present invention;

[0018] Figure 4 This is a cross-sectional disassembly view of the interlayer region of a sealing strip for a plate-fin heat exchanger provided in Embodiment 1 of this utility model;

[0019] Figure 1-4 Includes: 1. Seal body; 11. Fitting area; 12. First upright plate; 121. First through groove; 122. First frame; 13. Second upright plate; 131. Second through groove; 2. Metal mesh plate; 21. Enclosure plate; 22. Pad plate; 23. Protrusions. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0021] Example 1:

[0022] like Figure 1-4 As shown:

[0023] This utility model provides a sealing strip for a plate-fin heat exchanger, comprising a sealing strip body 1; the sealing strip body 1 includes a first surface and a second surface; the first surface is located on the upper surface of the sealing strip body 1; the first surface is bonded to the upper partition of the sealing strip body 1; the second surface is located on the lower surface of the sealing strip body 1; the second surface is bonded to the lower partition of the sealing strip body 1; the first surface has fitting areas 11 at both ends along the length direction of the sealing strip body 1; the fitting areas 11 have a first upright plate 12 and a second upright plate 13; the first upright plate 12 is fixedly arranged along the length direction of the sealing strip body 1; the second upright plate 13 is fixedly arranged along the width direction of the sealing strip body 1; the first surface and the second surface are arranged symmetrically.

[0024] When installing the sealing strip for a plate-fin heat exchanger provided by this utility model, the sealing strip body 1 is first placed between the upper and lower partition plates. The fitting areas 11 at both ends of the first surface of the sealing strip body 1 mate with two corresponding positions on the upper partition plate. Recesses or grooves are provided at corresponding positions on the upper partition plate to accommodate the shapes of the corresponding first vertical plate 12 and second vertical plate 13. On the one hand, after the sealing strip body 1 is installed with the upper partition plate, the first vertical plate 12 and second vertical plate 13 will be completely embedded in the corresponding recesses or grooves on the upper partition plate, forming a stable connection. Since the first vertical plate 12 and second vertical plate 13 are arranged horizontally and vertically respectively, they are perpendicular to each other. After the first upright plate 12 and the second upright plate 13 are embedded in the upper partition, the first upright plate 12 has high bending stiffness in the lateral direction, while the second upright plate 13 has high bending stiffness in the longitudinal direction. Therefore, setting the first upright plate 12 and the second upright plate 13 perpendicular to each other can make the seal body 1 and the upper partition have a very stable connection strength, which is beneficial to improving the structural strength after brazing. On the other hand, the first upright plate 12 and the second upright plate 13 have a large contact area with the upper partition. While ensuring that the welding surface is large enough, the upright and square shape of the first upright plate 12 and the second upright plate 13 is easier to process. Moreover, whether it is foil brazing filler or paste brazing filler, it can be placed stably, and the solder is more uniform, which can ensure that the structural strength of each position is consistent after welding.

[0025] Since the upper and lower sides of the seal body 1 are symmetrically arranged, the scheme of the lower partition corresponding to the second surface of the seal body 1 is the same as that of the upper partition, so it will not be described again.

[0026] This utility model provides a sealing strip for a plate-fin heat exchanger. The sealing strip body 1 and the partition are connected by the first vertical plate 12 and the second vertical plate 13. While ensuring that the welding surface is large enough, the welding material can be placed evenly and stably, ensuring that the structural strength of each position is consistent after welding.

[0027] When placing either foil solder or paste solder, simply placing it on the flat top of the upright plate can easily lead to deformation or displacement of the solder during installation due to scraping or vibration. To stabilize and prevent solder loss, in a preferred embodiment, the upper surface of the first upright plate 12 has a first through groove 121; the first through groove 121 is arranged along the length of the seal body 1; the upper surface of the second upright plate 13 has a second through groove 131; the second through groove 131 is arranged along the width of the seal body 1. If the solder is foil solder, a long strip of solder can be placed inside the through groove. If the solder is paste solder, the paste solder can be applied inside the through groove. The sidewall structure on both sides of the groove effectively fixes and protects the solder.

[0028] This utility model provides a sealing strip for plate-fin heat exchangers. By opening a through groove in the vertical plate and placing the solder inside the through groove, the deformation or displacement of the solder can be effectively avoided during installation.

[0029] To better fix the solder within the through-slot, in a preferred embodiment, the first upright plate 12 is further provided with a plurality of first supports 122; the first supports 122 are disposed at the bottom of the first through-slot 121 along the width direction of the first through-slot 121; the plurality of first supports 122 are spaced apart along the length direction of the first through-slot 121; the second upright plate 13 is further provided with a plurality of second supports; the second supports are disposed at the bottom of the second through-slot 131 along the width direction of the second through-slot 131; the plurality of second supports are spaced apart along the length direction of the second through-slot 131; the first supports 122 and the second supports have the same structure. If paste-like solder is placed in the through-slot, the supports act as spacers, dividing the elongated space inside the through-slot into several smaller spaces. Applying solder to each space makes it easier to control the amount applied, ensuring uniform solder distribution. If foil solder is placed in the through-slot, the supports act as supports, lifting the solder to ensure effective contact with the partitions and facilitating soldering.

[0030] This utility model provides a sealing strip for plate-fin heat exchangers, which effectively fixes the solder by setting a frame and ensures that the solder is evenly distributed.

[0031] In a preferred embodiment, both the top of the first platform 122 and the top of the second platform are provided with arc-shaped surfaces. The arc-shaped surfaces on the top of the platforms can prevent excessive compression of the solder, which could lead to localized depressions and deformations in the solder.

[0032] To further improve the stability of the welding, in a preferred embodiment, the first surface is further provided with a sandwich area; the sandwich area is located between the fitting areas 11 at both ends of the first surface; a metal mesh plate 2 is laid in the sandwich area; a surrounding plate 21 is provided on the periphery of the metal mesh plate 2; the surrounding plate 21 is disposed on the first surface. Before welding, the metal mesh plate 2 is initially fixed to the surface of the sealing strip body 1 by resistance welding, and then brazing is used to place solder on the metal mesh plate 2. After being fastened with the partition, it is heated to melt the solder and fill the gap between the metal mesh plate 2 and the partition, thereby achieving a stable connection.

[0033] The sealing strip for plate-fin heat exchangers provided by this utility model increases the connection layers and friction between the sealing strip and the partition by setting a metal mesh plate 2. In addition, the mesh structure of the metal mesh plate 2 can play a role in dispersing stress when subjected to force, effectively improving the overall connection stability.

[0034] Since the metal mesh plate 2 and the seal are only fixed by a few weld points before welding, they are very easy to loosen. Therefore, in a preferred embodiment, a pad 22 is provided between the first surface and the metal mesh plate 2; the upper surface of the pad 22 is provided with a plurality of protrusions 23; the protrusions 23 are hemispherical structures. The pad 22 is fixed to the surface of the seal body 1. When the metal mesh plate 2 is laid on the pad 22, the protrusions 23 can partially pass through the mesh of the metal mesh plate 2, thereby improving the mechanical connection between the metal mesh plate 2 and the seal body 1 and preventing displacement of the two under force.

[0035] The sealing strip for plate-fin heat exchangers provided by this utility model can improve the mechanical connection between the metal mesh plate 2 and the sealing strip body 1 by setting a pad 22 with protrusions 23, and prevent the two from displacing when subjected to force.

[0036] In a preferred embodiment, the protrusion 23 is made of ceramic material. Ceramic material effectively blocks heat transfer during the operation of the plate-fin heat exchanger, reducing the impact of high temperatures on the seal and extending its service life. Simultaneously, the high strength of ceramic material provides support for the connection between the seal body 1 and the metal mesh plate 2, enhancing the overall structural stability.

[0037] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0038] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A sealing strip for a plate-fin heat exchanger, characterized in that, The device includes a seal body; the seal body includes a first surface and a second surface; the first surface is located on the upper surface of the seal body; the first surface is bonded to the upper partition of the seal body; the second surface is located on the lower surface of the seal body; the second surface is bonded to the lower partition of the seal body; the first surface has fitting areas at both ends along the length direction of the seal body; the fitting areas have a first upright plate and a second upright plate; the first upright plate is fixedly arranged along the length direction of the seal body; the second upright plate is fixedly arranged along the width direction of the seal body; the first surface and the second surface are symmetrically arranged vertically.

2. The sealing strip for a plate-fin heat exchanger according to claim 1, characterized in that, The upper surface of the first upright plate is provided with a first through groove; the first through groove is arranged along the length direction of the seal body; the upper surface of the second upright plate is provided with a second through groove; the second through groove is arranged along the width direction of the seal body.

3. The sealing strip for a plate-fin heat exchanger according to claim 2, characterized in that, The first upright plate is also provided with a plurality of first supports; the first supports are disposed at the bottom of the first through groove along the width direction of the first through groove; the plurality of first supports are spaced apart along the length direction of the first through groove; the second upright plate is also provided with a plurality of second supports; the second supports are disposed at the bottom of the second through groove along the width direction of the second through groove; the plurality of second supports are spaced apart along the length direction of the second through groove; the first supports and the second supports have the same structure.

4. The sealing strip for a plate-fin heat exchanger according to claim 3, characterized in that, Both the top of the first platform and the top of the second platform are provided with arc-shaped surfaces.

5. The sealing strip for a plate-fin heat exchanger according to claim 1, characterized in that, The first surface is further provided with a sandwich area; the sandwich area is located between the fitting areas at both ends of the first surface; the sandwich area is covered with a metal mesh plate; the metal mesh plate is surrounded by a surrounding plate; the surrounding plate is disposed on the first surface.

6. The sealing strip for a plate-fin heat exchanger according to claim 5, characterized in that, A pad is provided between the first surface and the metal mesh plate; the upper surface of the pad is provided with a plurality of protrusions; the protrusions are hemispherical structures.

7. The sealing strip for a plate-fin heat exchanger according to claim 6, characterized in that, The bumps are made of ceramic material.

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