A plate heat exchanger with high pressure resistance

Abstract

This utility model discloses a plate heat exchanger with strong pressure resistance, including a heat exchange assembly, a top plate, and a bottom plate. The heat exchange assembly includes a first heat exchange plate and a second heat exchange plate. Corner holes are provided at the four corners of the top plate, the first heat exchange plate, and the second heat exchange plate. A first boss and a first recess are respectively provided at the two corner holes at the same end of the first heat exchange plate. A second recess and a second boss are respectively provided on the second heat exchange plate. A fixing post is provided between the two corner holes at the same end of the top plate. Several first ridges and first grooves in a parallel, alternating "I" shape are provided between the first boss and the first recess on the first heat exchange plate. The distance between two adjacent first ridges is less than the diameter of the fixing post. A second groove and a second ridge are provided between the second recess and the second boss on the second heat exchange plate. The plates at the fixing posts are connected by line contact, thus effectively improving the connection strength and pressure resistance.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a plate heat exchanger with strong pressure resistance. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchange device formed by stacking heat exchange plates. Inside the plate heat exchanger, there are alternating first and second plate spaces between the heat exchange plates. At each of the four corners of the plate heat exchanger, there are corner holes that form pairs to serve as inflow and outflow channels for fluids in the first and second plate spaces, thereby realizing liquid-liquid or vapor-liquid heat exchange between the first and second plate spaces.

[0003] To facilitate installation on other components, existing plate heat exchangers typically have fixing posts welded between two corner holes at the same end of the top plate. However, because the plates in existing plate heat exchangers are often connected to the fixing posts using mirrored V-shaped ribs or oppositely arranged convex bulges, this is a point-contact connection structure with poor connection strength and pressure resistance. Furthermore, since the contact connection structure is located inside the plate heat exchanger, the connection point is difficult to observe directly from the outside. This makes it difficult to accurately weld the fixing posts to the connection point, leading to the plate heat exchanger being easily damaged or cracked during installation using fixing posts. Therefore, there is room for improvement. Utility Model Content

[0004] This invention aims to overcome the deficiencies in the prior art by providing a plate heat exchanger with strong pressure resistance. Its structure is simple and reasonable. The plates at the connection points with the fixed columns are connected by abutting ridges and grooves in a line contact manner, effectively increasing the contact area and improving connection strength and pressure resistance. Simultaneously, the distance between adjacent ridges and grooves is smaller than the diameter of the fixed column, allowing the fixed column to directly rest at at least one connection point during welding. This effectively improves the tensile strength of the top plate, preventing damage or cracking and ensuring the reliability of the heat exchanger.

[0005] To achieve the above objectives, this utility model provides a plate heat exchanger with strong pressure resistance, comprising a main body with a rectangular cross-section. Corner holes are provided at each of the four corners of the main body. The main body includes a heat exchange assembly and a top plate and a bottom plate respectively disposed at the upper and lower ends of the heat exchange assembly. The heat exchange assembly includes several alternately stacked first and second heat exchange plates. Corner holes are provided at the four corners of the top plate, the first heat exchange plates, and the second heat exchange plates. A first protrusion abutting against the upper plate and a first recessed platform abutting against the lower plate are respectively provided at two corner holes at the same end of the first heat exchange plate. A second recessed platform abutting against the lower first protrusion and a second protrusion abutting against the upper first recessed platform are correspondingly provided on the second heat exchange plate. A fixing post is provided between the two corner holes at the same end of the top plate. The first heat exchange plate has several parallel alternating first ridges and first grooves arranged in a straight line structure between the first boss and the first recess. The distance between two adjacent first ridges is less than the diameter of the fixed column. The first ridge is the same height as the first boss, and the first groove is the same depth as the first recess. The second heat exchange plate is provided with a second groove that corresponds to the first ridge below and has the same depth as the second groove, and a second ridge that corresponds to the first groove above and has the same height as the second boss.

[0006] The configuration is further defined as follows: a first upper channel is formed between a plurality of first ridges and a first protrusion on the upper surface of the first heat exchange plate, and a first lower channel is formed between a plurality of first grooves and a first recess on the lower surface of the first heat exchange plate. The upper surface of the second heat exchange plate is configured to form a second upper channel that cooperates with the upper first lower channel to form a first channel between a plurality of second ridges and second protrusions. The lower surface of the second heat exchange plate is configured to form a second lower channel that cooperates with the lower first upper channel to form a second channel between a plurality of second grooves and second recesses.

[0007] The configuration is further defined as follows: the first channel is an arc-shaped structure arranged along the outer edge of the second protrusion, and the second channel is an arc-shaped structure arranged along the outer edge of the second recess.

[0008] The configuration is further defined as follows: the top walls of the first ridge and the second ridge are both planar structures, and the bottom walls of the first groove and the second groove are also both planar structures.

[0009] A further feature is provided: a recessed portion is provided on the surface of the base plate located within the corner hole channel.

[0010] The configuration is further defined as follows: both the first ridge and the first groove are parallel to the short side of the first heat exchange plate; The second ridge and the second groove are both parallel to the short side of the second heat exchange plate.

[0011] Compared with existing technologies, this utility model has a simple and reasonable structure. The plates at the connection points of the fixed columns are connected by abutting ridges and grooves in a straight line, which effectively increases the contact area and improves the connection strength and pressure resistance. At the same time, the distance between adjacent ridges and grooves is smaller than the diameter of the fixed column, so the fixed column can directly rest at at least one connection point during welding. This effectively improves the tensile strength of the top plate and can effectively prevent it from being pulled or cracked, ensuring the reliability of the heat exchanger. Furthermore, the fluid flowing in through the corner hole is guided by the first and second channels to flow around another corner hole, thereby optimizing the corner hole distribution, improving the flow uniformity, and ensuring that there are no dead zones in the flow. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a plate heat exchanger with strong pressure resistance according to this utility model. Figure 2 This is a schematic diagram of the separation structure of a plate heat exchanger; Figure 3 This is a three-dimensional structural diagram of the first heat exchange plate; Figure 4 This is a three-dimensional structural diagram of the second heat exchange plate.

[0013] The following reference numerals are marked on the accompanying drawings: 100. Main body; 101. Corner hole channel; 10. Top plate; 20. First heat exchange plate; 21. First boss; 22. First recessed platform; 23. First ridge; 24. First groove; 25. First upper channel; 26. First lower channel; 30. Second heat exchange plate; 31. Second recessed platform; 32. Second boss; 33. Second groove; 34. Second ridge; 35. Second upper channel; 36. Second lower channel; 40. Bottom plate; 41. Recessed part; 50. Fixing column. Detailed Implementation

[0014] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0015] This utility model discloses a plate heat exchanger with strong pressure resistance, such as... Figure 1 and Figure 2As shown, it includes a main body 100 with a rectangular cross-section. The main body 100 is composed of several stacked heat exchange plates, and the adjacent plates are fitted together to form alternating first and second inter-plate spaces. The main body 100 has four corner holes 101 at its four corners, which are paired to form the inflow and outflow channels for fluid in the first and second inter-plate spaces, respectively. Specifically, the main body 100 includes a heat exchange assembly, and a top plate 10 and a bottom plate 40 located above and below the heat exchange assembly, respectively. The heat exchange assembly includes several alternatingly stacked first and second heat exchange plates 20 and 30, wherein the top plate 10, the first heat exchange plates 20, the second heat exchange plates 30, and the bottom plate 40 are all rectangular corrugated plates. Furthermore, corner holes are provided at the four corners of the corresponding plates. The first heat exchange plate 20 has a first protrusion 21 that abuts against the upper plate and a first recess 22 that abuts against the lower plate at the two corner holes at the same end. The second heat exchange plate 30 has a second recess 31 that abuts against the lower first protrusion 21 and a second protrusion 32 that abuts against the upper first recess 22 at its corner holes. In this way, fluid entry is restricted by the opposing protrusions and recesses or plate surfaces in the same space between the plates, and fluid flow is allowed through the gap between the opposing recesses and protrusions or plate surfaces. A fixing post 50 for installation and connection is provided between the two corner holes at the same end (short side) of the top plate 10.

[0016] In this embodiment, as Figure 2As shown, the first heat exchange plate 20 has several parallel and alternating first ridges 23 and first grooves 24 arranged in a straight line between the first boss 21 and the first recess 22 at the same end. The first ridges 23 are at the same height as the first boss 21, and the first grooves 24 are at the same depth as the first recess 22. At the same time, the distance between two adjacent first ridges 23 (first grooves 24) is less than the diameter of the fixing column 50. This structure ensures that when the fixing column 50 is installed on the top plate 10, it can rest on at least one connecting structure, thereby improving the tensile strength of the top plate 10 and effectively reducing the risk of being pulled apart. The second heat exchange plate 30 has two second ridges 34 arranged in a straight line between the second recess 31 and the second boss 32 at the same end. These ridges correspond one-to-one with the first grooves 24 above and are at the same height as the second boss 32. The heat exchange components are constructed such that the plate surfaces of the heat exchange components corresponding to the corner holes at the same end are connected by the first ridge 23 and the second groove 33 of the "I" shape, or by the first groove 24 and the second ridge 34 of the "I" shape. At the same time, the heat exchange components are connected to the top plate 10 above through the ridge and to the bottom plate 40 below through the groove. This line contact method effectively increases the connection area between the two, and effectively improves the connection strength and pressure bearing capacity between the plates. Preferably, the top walls of the first ridge 23 and the second ridge 34 are both planar structures, and the bottom walls of the first groove 24 and the second groove 33 are also planar structures, which can effectively improve the connection effect between the ridge and the groove.

[0017] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the upper surface of the first heat exchange plate 20 has a first upper channel 25 formed between a plurality of first ridges 23 and first protrusions 21, and the lower surface of the first heat exchange plate 20 has a first lower channel 26 formed between a plurality of first grooves 24 and first recesses 22; the upper surface of the second heat exchange plate 30 has a second upper channel 35 formed between a plurality of second ridges 34 and second protrusions 32, which cooperates with the upper first lower channel 26 to form a first channel; the lower surface of the second heat exchange plate 30 has a second upper channel 35 formed between a plurality of second grooves 33 and second recesses 31, which cooperates with the lower... The first upper channel 25 cooperates with the second lower channel 36 to form the second channel. The first channel is preferably an arc-shaped structure arranged along the outer edge of the second boss 32, and the second channel is preferably an arc-shaped structure arranged along the outer edge of the second recess 31. In this way, within the same inter-plate space, the fluid flowing into the corner hole on one side of the same end can be forced to flow to the corner hole on the other side through the first channel 24 and the second ridge 34 arranged opposite to each other. Then, under the forced action of the first channel or the second channel, the fluid flows around the corner hole on the other side, which effectively optimizes the corner hole distribution, improves the flow uniformity, and makes the flow without dead corners.

[0018] In this embodiment, a recessed portion 41 is provided on the surface of the base plate 40 located within the corner hole channel 101, which can effectively improve the impact resistance of the base plate 40 and effectively prevent cracking.

[0019] Compared with existing technologies, this utility model has a simple and reasonable structure. The plates at the connection points of the fixed columns are connected by abutting ridges and grooves in a straight line, which effectively increases the contact area and improves the connection strength and pressure resistance. At the same time, the distance between adjacent ridges and grooves is smaller than the diameter of the fixed column, so the fixed column can directly rest at at least one connection point during welding. This effectively improves the tensile strength of the top plate and can effectively prevent it from being pulled or cracked, ensuring the reliability of the heat exchanger. Furthermore, the fluid flowing in through the corner hole is guided by the first and second channels to flow around another corner hole, thereby optimizing the corner hole distribution, improving the flow uniformity, and ensuring that there are no dead zones in the flow.

[0020] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A plate heat exchanger with high pressure resistance, comprising a main body with a rectangular cross-section, wherein corner holes are provided at each of the four corners of the main body, the main body comprising a heat exchange assembly, and a top plate and a bottom plate respectively disposed at the upper and lower ends of the heat exchange assembly, the heat exchange assembly comprising a plurality of alternatingly stacked first heat exchange plates and second heat exchange plates, wherein corner holes are provided at each of the four corners of the top plate, the first heat exchange plates and the second heat exchange plates, wherein a first protrusion abutting against the upper plate and a first recessed plate abutting against the lower plate are respectively provided at two corner holes at the same end of the first heat exchange plate, and a second recessed plate abutting against the first recessed plate at the lower end and a second protrusion abutting against the first recessed plate at the upper end of the second heat exchange plate, wherein a fixing post is provided between the two corner holes at the same end of the top plate; Its features are, The first heat exchange plate has several parallel alternating first ridges and first grooves arranged in a straight line structure between the first boss and the first recess. The distance between two adjacent first ridges is less than the diameter of the fixed column. The first ridge is at the same height as the first boss, and the first groove is at the same depth as the first recess. The second heat exchange plate is provided with a second groove that corresponds to the first ridge below and has the same depth as the second groove, and a second ridge that corresponds to the first groove above and has the same height as the second boss.

2. A plate heat exchanger with high pressure resistance according to claim 1, characterized in that, The upper surface of the first heat exchange plate has a first upper channel formed between a plurality of first ridges and first protrusions, and the lower surface of the first heat exchange plate has a first lower channel formed between a plurality of first grooves and first recesses. The upper surface of the second heat exchange plate is configured to form a second upper channel that cooperates with the upper first lower channel to form a first channel between a plurality of second ridges and second protrusions. The lower surface of the second heat exchange plate is configured to form a second lower channel that cooperates with the lower first upper channel to form a second channel between a plurality of second grooves and second recesses.

3. A plate heat exchanger with high pressure resistance according to claim 2, characterized in that, The first channel is an arc-shaped structure arranged along the outer edge of the second boss, and the second channel is an arc-shaped structure arranged along the outer edge of the second recess.

4. A plate heat exchanger with high pressure resistance according to claim 1, characterized in that, The top walls of the first ridge and the second ridge are both planar structures, and the bottom walls of the first groove and the second groove are also planar structures.

5. A plate heat exchanger with high pressure resistance according to claim 1, characterized in that, The base plate has a recessed portion on its surface located within the corner hole channel.

6. A plate heat exchanger with high pressure resistance according to claim 1, characterized in that, Both the first ridge and the first groove are parallel to the short side of the first heat exchange plate; The second ridge and the second groove are both parallel to the short side of the second heat exchange plate.

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