A head and plate-fin heat exchanger

Abstract

The utility model discloses a kind of head, it is related to plate-fin heat exchanger technical field, including head body;The inside of head body is equipped with cavity connected to outside;Cavity is equipped with the through opening for connecting plate bundle;Further include web plate;Web plate is connected to cavity inner wall, and cover in through opening;Web plate is integrally formed with head body;Web plate is provided with through hole.The utility model provides a kind of head by integrally formed web plate in the inside of head, effectively improve the structural strength of head, so that head can be suitable for high pressure working condition.

Description

Technical Field

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

[0002] A plate-fin heat exchanger is a highly efficient and compact heat exchange device, with its core component being a plate bundle. The plate bundle 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 a single unit, thus forming the plate bundle. End caps are located at both ends of the plate bundle channel, connecting to external pipes and sealing the interior of the plate bundle, allowing fluid to flow in and out of the plate bundle channel in a closed loop.

[0003] Because end caps are used to carry fluids, they need to withstand high pressures from the fluid. Under long-term high-pressure and high-temperature operating environments, traditional end caps are prone to failure and leakage, leading to fluid leakage. Utility Model Content

[0004] To address the problem of head failure under high-pressure conditions in existing technologies, this invention provides a head and plate-fin heat exchanger that effectively improves the structural strength of the head by incorporating an integrally formed stiffening plate inside the head, making the head suitable for high-pressure conditions.

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

[0006] In a first aspect, the present invention provides a head, comprising a head body; the head body having an interior cavity connected to the outside; the cavity having an opening for connecting a plate bundle; and further comprising a stiffening plate; the stiffening plate being connected to the inner wall of the cavity and covering the opening; the stiffening plate being integrally formed with the head body; and the stiffening plate having a through hole.

[0007] The end cap provided by this utility model preferably includes an end plate, a top plate, a bottom plate, a first side plate, and a second side plate. The end plate is vertically disposed on the side of the plate bundle. The top plate and the bottom plate are respectively connected to the top and bottom ends of the end plate along the length direction of the end plate. The first side plate and the second side plate are respectively connected to the two sides of the end plate in the lateral direction. The top plate, the bottom plate, the first side plate, and the second side plate surround the side of the end plate facing the plate bundle and form a cavity. Rib plates are disposed inside the cavity. The periphery of the rib plates is connected to the top plate, the bottom plate, the first side plate, and the second side plate.

[0008] The end cap provided by this utility model preferably has its top end connected to the top plate and its bottom end connected to the bottom plate; the rib plate is connected to the top plate and the bottom plate by a rounded transition.

[0009] The end cap provided by this utility model is preferably connected to the plate bundle by a double-welded structure.

[0010] Secondly, the present invention provides a plate-fin heat exchanger, including the aforementioned end cap.

[0011] The above technical solution has the following advantages or beneficial effects: This utility model provides a head, relating to the field of plate-fin heat exchanger technology, comprising a head body; the head body has an internal cavity connected to the outside; the cavity has an opening for connecting plate bundles; it also includes a stiffening plate; the stiffening plate is connected to the inner wall of the cavity and covers the opening; the stiffening plate is integrally formed with the head body; the stiffening plate has a through hole. This utility model provides a head that effectively improves the structural strength of the head by providing an integrally formed stiffening plate inside the head, making the head suitable for high-pressure conditions. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is an overall structural diagram of a plate-fin heat exchanger provided in Embodiment 1 of this utility model;

[0014] Figure 2 This is a structural relationship diagram of the end cap body and the stiffening plate provided in Embodiment 1 of this utility model;

[0015] Figure 3 A cross-sectional view of the head body of a head provided in Embodiment 1 of this utility model;

[0016] Figure 1-3 Includes: 1. Head body; 11. End plate; 12. Top plate; 13. Bottom plate; 14. First side plate; 15. Second side plate; 16. Cavity; 2. Plate bundle; 3. Rib plate. Detailed Implementation

[0017] 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.

[0018] Example 1:

[0019] like Figure 1-3 As shown:

[0020] Firstly, since the existing end caps have poor reliability under high pressure conditions, in order to improve the structural strength of the end caps, this utility model provides an end cap including an end cap body 1; the end cap body 1 has an internal cavity 16 connected to the outside; the cavity 16 has an opening for connecting a plate bundle 2; it also includes a stiffening plate 3; the stiffening plate 3 is connected to the inner wall of the cavity 16 and covers the opening; the stiffening plate 3 is integrally formed with the end cap body 1; the stiffening plate 3 has a through hole.

[0021] When installing and applying the end cap provided by this utility model, first prepare two sets of end caps, namely an upper end cap and a lower end cap, and place the upper end cap and the lower end cap on both sides of the plate bundle channel respectively. After sealing and connecting with the plate bundle, connect the liquid inlet end of the external fluid channel to the upper end cap and the liquid outlet end of the external fluid channel to the lower end cap. The fluid that needs to exchange heat enters the cavity 16 of the upper end cap, passes through the through hole of the stiffener 3, enters the plate bundle channel for heat exchange, and finally flows into the cavity 16 of the lower end cap and flows out from the liquid outlet end.

[0022] During the aforementioned operation, the internal cavity 16 of the end cap body 1 needs to withstand high pressure from the fluid. Since the cavity 16 needs to have an opening connecting to the plate bundle 2, this opening can reduce the structural strength of the end cap body 1 under high pressure. To enhance this structural strength, stiffening plates 3 are installed at the opening location. The stiffening plates 3 cover the opening, structurally reinforcing the opening area of ​​the end cap body 1. Furthermore, to avoid obstructing fluid flow, the stiffening plates 3 have multiple regularly arranged through holes. These through holes are not only evenly distributed but also have the same diameter, and are horizontally and vertically aligned. The opening of the end cap body 1 is rectangular to match the plate bundle 2. When the plate bundle channel is horizontal, to maximize the structural strength of the end cap body 1, the stiffening plates 3 should be vertically positioned and symmetrically distributed along the axial centerline of the end cap body 1. This structure increases the stiffness and compressive strength of the end cap body 1, resisting radial expansion forces under high pressure. It also provides additional support to the end cap body 1, delaying its fatigue failure.

[0023] The end cap provided by this utility model increases the local thickness of the inner wall of the cavity 16 by setting a stiffening plate 3 at the opening of the cavity 16, thereby improving the bending and deformation resistance of the structure and effectively improving the reliability and service life of the end cap.

[0024] In a preferred embodiment of this invention, the head body 1 comprises an end plate 11, a top plate 12, a bottom plate 13, a first side plate 14, and a second side plate 15. The end plate 11 is vertically disposed on the side of the plate bundle 2. The top plate 12 and the bottom plate 13 are respectively connected to the top and bottom ends of the end plate 11 along its length. The first side plate 14 and the second side plate 15 are respectively connected to the lateral sides of the end plate 11. The top plate 12, bottom plate 13, first side plate 14, and second side plate 15 surround the side of the end plate 11 facing the plate bundle 2, forming a cavity 16. Rib plates 3 are disposed inside the cavity 16. The periphery of the rib plates 3 is connected to the top plate 12, bottom plate 13, first side plate 14, and second side plate 15. To allow connection to the inlet and outlet of external fluids, an opening can be provided in the top plate 12, through which a sealed connection to an external pipeline can be established.

[0025] In mechanics, right-angle or acute-angle connections can cause stress to accumulate sharply at the corners, making it prone to cracking and propagation under high pressure. To reduce the stress intensity at the connection between the stiffener 3 and the head body 1, in a preferred embodiment, the top end of the stiffener 3 is connected to the top plate 12; the bottom end of the stiffener 3 is connected to the bottom plate 13; and the stiffener 3 is connected to the top plate 12 and the bottom plate 13 by a rounded transition. The connection between the stiffener 3 and the inner wall of the cavity 16 has a rounded transition structure, connecting the head body 1 and the stiffener 3 through a smooth curved surface, allowing stress to gradually disperse along the arc surface and reducing local stress peaks. In addition, the smooth transition of the inner wall surface of the cavity 16 can reduce turbulence and eddies when fluid flows through (especially when fluid enters the plate bundle from the head body 1), and can also avoid scouring corrosion caused by excessive local flow velocity (the damage to metal caused by medium scouring under high pressure is more significant), thus improving the corrosion resistance and service life of the head.

[0026] The end cap provided by this utility model has a rounded transition structure at the connection between the stiffening plate 3 and the inner wall of the cavity 16, which can effectively disperse local stress and effectively improve the stress resistance of the end cap body 1.

[0027] To improve the connection strength and sealing performance between the end cap body 1 and the plate bundle 2, in a preferred embodiment, the end cap body 1 and the plate bundle 2 are connected by a double-welded structure. Since the connection between the end cap body 1 and the plate bundle 2 is relatively fragile during high-pressure fluid impact, it must simultaneously withstand the axial tensile force caused by internal pressure (the end cap body 1 tends to detach from the plate bundle 2) and the sealing requirements of the fluid. The double-welding structure forms two independent weld seams, further increasing the weld thickness and strength while ensuring basic connection and sealing. The two weld seams share the axial tensile force, improving the tensile strength of the connection. Furthermore, even if one weld seam has a minor defect, the other weld seam can temporarily provide a seal, reducing the risk of instantaneous leakage, making it particularly suitable for high-pressure applications.

[0028] The end cap provided by this utility model uses a double-welded structure to connect the end cap body 1 and the plate bundle 2, which can provide double sealing protection, prevent high-pressure fluid leakage, and strengthen the structural strength of the connection part.

[0029] Secondly, this utility model provides a plate-fin heat exchanger, including the aforementioned end caps. When using the end caps provided by this utility model in a plate-fin heat exchanger, two sets of end caps are first prepared, consisting of an upper end cap and a lower end cap, which are respectively positioned on both sides of the plate bundle channel. After being sealed and connected to the plate bundle, the inlet end of the external fluid channel is connected to the upper end cap, and the outlet end of the external fluid channel is connected to the lower end cap. The fluid requiring heat exchange enters the interior of the upper end cap, then enters the plate bundle channel for heat exchange, and finally flows into the lower end cap and exits from the outlet end.

[0030] 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.

[0031] 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 closure comprising a closure body; the closure body having an interior portion with a cavity connected to an exterior portion; the cavity having a port for connecting to a panel bundle; characterized in that, It also includes a stiffening plate; the stiffening plate is connected to the inner wall of the cavity and covers the opening; the stiffening plate is integrally formed with the end cap body; the stiffening plate has a through hole.

2. A head as claimed in claim 1, characterised in that The end cap body includes an end plate, a top plate, a bottom plate, a first side plate, and a second side plate; the end plate is vertically disposed on the side of the plate bundle; the top plate and the bottom plate are respectively connected to the top and bottom ends of the end plate along the length direction of the end plate; the first side plate and the second side plate are respectively connected to the lateral sides of the end plate; the top plate, the bottom plate, the first side plate, and the second side plate surround one side of the end plate facing the plate bundle direction and form the cavity; the stiffening plate is disposed inside the cavity; the periphery of the stiffening plate is connected to the top plate, the bottom plate, the first side plate, and the second side plate.

3. A head as claimed in claim 2, characterised in that The top end of the stiffening plate is connected to the top plate; the bottom end of the stiffening plate is connected to the bottom plate; the stiffening plate is connected to the top plate and the bottom plate by a rounded transition.

4. The head defined in claim 1, wherein The head body and the plate bundle are connected by a double-welded structure.

5. A plate-fin heat exchanger, characterized by Includes the end cap as described in any one of claims 1-4.

Images