Heat exchanger with expansion sealing structure

Abstract

The heat exchanger of the expansion sealing structure comprises a core body formed by stacking a plurality of parallel plate sheets, the plate sheets are all arranged in the front-back direction, a fluid channel is formed between every two adjacent plate sheets, and the fluid channels penetrate through the whole core body; a frame is arranged on the periphery of the core body, side plates are arranged on the left side and the right side of the core body, the side plates are parallel to the plate pieces and fixed to the frame, and the four edges of the side plates are connected with the frame to jointly seal the left side and the right side of the core body. The front side and the rear side of the core body are each provided with a deformable expansion joint, and the expansion joints are connected with the frame. The expansion joints are used for connecting the heat exchange plates and the peripheral frame of the heat exchanger, the expansion joints can absorb deformation during thermal expansion, the plates can be allowed to have a certain moving and stretching space during thermal expansion, and therefore the problem of structural damage caused by thermal expansion is reduced or prevented, and meanwhile connection stability and sealing performance are kept.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a heat exchanger with an expansion sealing structure. Background Art

[0002] The fully welded heat exchanger is a high-efficiency heat exchange device that has been widely used in the industrial field in recent years. Its main feature is that all contact parts are fully welded and there are no non-welded joints, which improves heat exchange efficiency, reduces leakage risks, and enhances the durability and stability of the equipment.

[0003] The fully welded structure eliminates the sealing media used in traditional heat exchangers, reducing the risk of leakage, improving heat transfer efficiency and operational safety. This design also makes the fully welded heat exchanger perform well in high-temperature, high-pressure and corrosive environments.

[0004] Although fully welded heat exchangers perform well in some high-temperature applications, under extreme high-temperature conditions, such as high-temperature environments exceeding 600°C, they will still produce a certain degree of deformation due to thermal expansion, causing structural damage. Utility Model Content

[0005] To this end, the present application provides a heat exchanger with an expansion seal structure to solve the problem in the prior art that the heat exchanger is prone to structural damage under high temperature conditions.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A heat exchanger with an expansion sealing structure comprises a core formed by stacking a plurality of parallel plates, the plates being arranged in a front-to-back direction, with fluid channels formed between adjacent plates, the fluid channels running through the entire core; a frame being provided on the periphery of the core, side panels being provided on both the left and right sides of the core, the side panels being parallel to the plates and fixed to the frame, and the four sides of the side panels being connected to the frame to jointly seal the left and right sides of the core; deformable expansion joints being provided on both the front and back sides of the core, the expansion joints being connected to the frame.

[0008] Optionally, a deformation portion is provided in the middle of the expansion joint, and the deformation portion is an arc-shaped protrusion protruding outward.

[0009] Optionally, a plurality of the deformation parts are provided.

[0010] Optionally, the expansion joint is made of flexible material.

[0011] Optionally, bosses or bumps are provided on the plate to form fluid channels.

[0012] Optionally, support frames are provided between the upper and lower ends of the core and the frame, and ends of the support frames extend beyond the surface of the frame.

[0013] Optionally, a foot is fixed to the end of the support frame.

[0014] Optionally, adjacent plates are separated by fixing blocks or comb plates.

[0015] Optionally, a thin plate or a high-temperature resistant material is used to fill the space between the left and right sides of the core and the frame, and the thin plate or the high-temperature resistant material is arranged on the inner side of the side plate.

[0016] Optionally, the gaps between the left and right sides of the core and the frame are sealed by horizontal bars.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] By using expansion joints to connect the heat exchange plates to the heat exchanger's outer frame, the expansion joints can absorb deformation during thermal expansion, allowing the plates to move and expand to a certain extent during thermal expansion, thereby reducing or preventing structural damage caused by thermal expansion while maintaining the stability and sealing of the connection. This method ensures the safe and efficient operation of the heat exchanger during operation, extending the service life of the equipment and reducing maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components).

[0020] Figure 1 A schematic structural diagram of an expansion seal structure heat exchanger provided in an embodiment of the present application;

[0021] Figure 2 A cross-sectional view of an embodiment of the present application;

[0022] Figure 3 This is another cross-sectional view of an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 1. Core; 2. Fixed block; 3. Frame; 4. Side panel; 5. Expansion joint; 6. Deformation part; 7. Support frame; 8. Anchor; 9. Thin plate; 10. Horizontal bar. DETAILED DESCRIPTION

[0025] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0026] In the description of this application: unless otherwise specified, "a plurality of" means two or more. Expressions such as "include", "comprising", "having" and the like also mean "not limited to" (certain units, components, materials, steps, etc.).

[0027] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0028] An expansion seal structure heat exchanger, referring to Figure 1-Figure 3 , addressing the application of fully welded heat exchangers in high-temperature ranges, includes a core 1 composed of multiple parallel plates stacked or layered. The plates are arranged in a front-to-back direction, with gaps between adjacent plates forming fluid channels. The fluid channels run through the entire core 1, allowing cold and hot media to flow through the cold and hot sides of the heat exchanger, respectively. To ensure the stability of the core 1, adjacent plates are separated by fixed blocks 2 or comb plates, which contact two adjacent plates to provide support and stability.

[0029] The plates used in this embodiment are generally made of metal materials, such as stainless steel, titanium alloy or other alloy materials. Each plate generally has a certain thickness to be able to withstand the pressure and temperature changes during the heat exchange process.

[0030] Each plate has a series of fluid channels, which can be in the form of bosses, convex points, or corrugated shapes. The design depends on the specific heat exchange requirements, and the height of the bosses, convex points, or corrugations can be determined according to the specific working conditions.

[0031] The core 1 is surrounded by a frame 3 made of square steel. The plates and frame 3 are connected using a fully welded process, without the use of traditional rubber gaskets or metal sealing strips. This design permanently secures the plates and frame 3 together through welding, achieving a seal. The absence of gaskets simplifies maintenance, eliminating the need for regular replacement of sealing components and reducing maintenance costs and downtime.

[0032] Side panels 4 are provided on both sides of the core 1 . The side panels 4 are parallel to the plate and fixed on the frame 3 . The four sides of the side panels 4 are welded to the surrounding frames 3 to seal the left and right sides of the core 1 .

[0033] In this embodiment, in order to prevent the heat exchanger from structural deformation and damage due to thermal expansion, deformable expansion joints 5 are provided on the front and rear sides of the core 1. The expansion joints 5 are connected to the frame 3, so that the plate does not need to be directly connected to the frame 3, and a certain gap is left between the plate and the frame 3. Therefore, a certain amount of movement and expansion space can be allowed for the plate when it expands due to heat, thereby reducing or preventing structural damage caused by thermal expansion.

[0034] Expansion joints 5 are typically made of flexible materials or specially designed structures that absorb deformation during thermal expansion while maintaining a stable and leak-tight connection. This ensures safe and efficient operation of the heat exchanger, extending its lifespan and reducing maintenance requirements.

[0035] In this embodiment, the expansion joint 5 is configured with a special structure. Specifically, a deformable portion 6 is stamped into the center of the expansion joint 5. This deformable portion 6 is an outwardly protruding arcuate protrusion. Therefore, when the plate deforms, the arcuate protrusion folds slightly to compensate for the plate deformation. To enhance the effectiveness of the expansion joint 5, multiple deformable portions 6 can be provided to collectively compensate for plate deformation.

[0036] Depending on the working conditions, the expansion joint 5 can be arranged at different pipe openings.

[0037] To improve the stability of the structure, support frames 7 are provided between the upper and lower ends of the core 1 and the frame 3. The ends of the support frames 7 extend beyond the surface of the frame 3 to support the frame 3. The support frames 7 are arranged in a U-shaped structure to leave a channel for the refrigerant to enter and exit.

[0038] Furthermore, a foot 8 is fixed to the end of the support frame 7 . The foot 8 is a plate-like structure extending outward perpendicularly to the end of the support frame 7 and is arranged around the support frame 7 .

[0039] The cavities formed between the left and right sides of the core 1 and the frame 3 can be filled with thin plates 9 or high-temperature resistant materials. Furthermore, the gaps between the left and right sides of the core 1 and the frame 3 are sealed with horizontal bars 10. Specifically, the present application uses thin plates 9 for filling, with the thin plates 9 being parallel to the side panels 4 and the plate, and horizontal bars 10 being connected to the thin plates 9, with the other end butting against the core 1.

[0040] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. An expansion seal structure heat exchanger, characterized in that: The invention comprises a core (1) formed by stacking a plurality of parallel plates, wherein the plates are arranged in a front-to-back direction, and fluid channels are formed between adjacent plates, and the fluid channels run through the entire core (1); a frame (3) is provided on the periphery of the core (1), and side panels (4) are provided on the left and right sides of the core (1), wherein the side panels (4) are parallel to the plates and fixed on the frame (3), and the four sides of the side panels (4) are connected to the frame (3) to seal the left and right sides of the core (1); and deformable expansion joints (5) are provided on the front and back sides of the core (1), and the expansion joints (5) are connected to the frame (3).

2. The expansion seal structure heat exchanger according to claim 1, characterized in that: A deformation portion (6) is provided in the middle of the expansion joint (5), and the deformation portion (6) is an arc-shaped protrusion protruding outward.

3. The expansion seal structure heat exchanger according to claim 2, characterized in that: A plurality of the deformation parts (6) are provided.

4. The expansion seal structure heat exchanger according to claim 1, characterized in that: The expansion joint (5) is made of flexible material.

5. The expansion seal structure heat exchanger according to claim 1, characterized in that: The plate is provided with bosses or convex points to form fluid channels.

6. The expansion seal structure heat exchanger according to claim 1, characterized in that: Support frames (7) are provided between the upper and lower ends of the core (1) and the frame (3), and the ends of the support frames (7) extend beyond the surface of the frame (3).

7. The expansion seal structure heat exchanger according to claim 6, characterized in that: A foot (8) is fixed to the end of the support frame (7).

8. The expansion seal structure heat exchanger according to claim 1, characterized in that: Adjacent plates are separated by fixed blocks (2) or comb plates.

9. The expansion seal structure heat exchanger according to claim 1, characterized in that: A thin plate (9) or a high-temperature resistant material is used to fill the space between the left and right sides of the core (1) and the frame (3), and the thin plate (9) or the high-temperature resistant material is arranged on the inner side of the side plate (4).

10. The expansion seal structure heat exchanger according to claim 1 or 9, characterized in that: The gaps between the left and right sides of the core (1) and the frame (3) are sealed by horizontal bars (10).

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