Bottom plate assembly of plate heat exchanger

Abstract

The utility model discloses a bottom plate assembly of a plate heat exchanger. The bottom plate assembly comprises a bottom plate and a matching plate, the bottom plate is a rectangular corrugated plate, the bottom plate comprises flow guide areas located at the two ends of the long side and a heat exchange area located between the flow guide areas, a plurality of flow guide ridges arranged at intervals are arranged in the flow guide areas, and the adjacent flow guide ridges are matched to form a flow guide channel; the matching plate is a rectangular corrugated plate, bosses are arranged at the positions, corresponding to two corners, of the matching plate, sinking tables are arranged at the positions, corresponding to the other two corners, of the matching plate, through holes are formed in the bosses, and at least one limiting rib is arranged on each sinking table. The bottom plate assembly is simple and reasonable in structure, the connection strength between the bottom plate assemblies is effectively improved through connection between the flow guide ridges and the sinking tables and connection between the limiting ribs and the flow guide channels, meanwhile, fluid in a heat exchanger impacts on the flow guide ridges and the sinking table faces respectively, the bottom plate is effectively prevented from being swelled or damaged, and the service life of the bottom plate assembly is prolonged. Therefore, the heat exchanger can tolerate at least 100,000 times of fatigue tests without leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a bottom plate component of a plate heat exchanger. Background Art

[0002] Plate heat exchangers are widely used in refrigeration and heating systems as evaporators, condensers, economizers, etc. due to their compact structure, high heat transfer coefficient, strong reliability, and small refrigerant charge. The existing plate heat exchanger is generally composed of a number of plates stacked and welded from bottom to top. The two plates at the bottom of the heat exchanger constitute the bottom plate assembly of the heat exchanger, which includes a bottom plate and a matching plate located above the bottom plate. Most of the existing bottom plates are flat structures, and the matching plate is a corrugated plate structure matched with the bottom plate. The matching plate is provided with through holes at its four corners, and bosses are provided at two of the through holes, and sinkers are provided at the other two through holes. The bottom plate assemblies are connected by welding the sinkers and corrugated grooves on the matching plate to the plane of the bottom plate. At the same time, the two heat exchange fluids in the heat exchanger directly impact the bottom plate through the through holes. In this way, during the fatigue test, the bottom plate assemblies are prone to cracking, and the bottom plate is prone to bulging or even damage at the corresponding through holes, which greatly affects the number of fatigue tests and has room for improvement. Utility Model Content

[0003] The utility model aims to overcome the defects in the above-mentioned prior art and provides a bottom plate assembly of a plate heat exchanger, which effectively improves the connection strength between the bottom plate assemblies by arranging a connection between the sinker and the guide ridge, and a connection between the limit rib and the guide groove between the bottom plate and the matching plate; at the same time, the two heat exchange fluids in the heat exchanger directly impact on the guide ridge of the bottom plate and the sinker surface above the bottom plate, respectively, and the sinker surface is restrained on the bottom plate, which effectively avoids bulging or damage at the inflow point of the bottom plate corresponding to the fluid, so that the heat exchanger can withstand more than 100,000 fatigue tests without leakage.

[0004] To achieve the above object, the utility model provides a bottom plate assembly of a plate heat exchanger, comprising a bottom plate located at the bottom of the plate heat exchanger, and a matching plate stacked above the bottom plate;

[0005] The bottom plate is a rectangular corrugated plate, and the bottom plate includes guide areas located at both ends of the long side, and a heat exchange area located between the guide areas at both ends. The guide areas at both ends are provided with a plurality of guide ridges arranged at intervals, and two adjacent guide ridges cooperate to form a guide channel for guiding the fluid to converge to the heat exchange area;

[0006] The matching plate is a rectangular corrugated plate, and is provided with upwardly protruding bosses at two of its corresponding corners and downwardly recessed platforms abutting against the guide ridge on the bottom plate at the other two corners. Through holes are provided on the surfaces of the two bosses, and at least one limiting rib is correspondingly provided on the surfaces of the two recessed platforms, which is recessed downward and placed in the guide channel and abuts against it.

[0007] It is further configured that: the plurality of guide ridges in the guide area are arranged parallel to the long side of the bottom plate.

[0008] It is further configured as follows: the two sinks are respectively arranged at the corners at both ends of the long side of the matching plate.

[0009] It is further configured as follows: a heat exchange pattern arranged in a concentric diamond structure is arranged in the heat exchange area of ​​the bottom plate, and the heat exchange pattern includes a diamond-shaped protrusion located in the center, at least one diamond-shaped ridge arranged around the outer periphery of the diamond-shaped protrusion, and at least one W-shaped ridge arranged at both ends of the diamond-shaped ridge, and the openings of the W-shaped ridges at both ends are arranged toward the short side and the V-shaped openings on the inner side are sleeved on the outer side of the diamond corners of the diamond-shaped ridge.

[0010] It is further configured that: the long diagonal line of the diamond-shaped protrusion is arranged parallel to the long side of the bottom plate.

[0011] It is further configured as follows: the heat exchange pattern also includes at least one V-shaped ridge located between the spoiler ridges at both ends and arranged on both sides close to the long side, the two sides of the V-shaped ridge are respectively parallel to the outer sides of the W-shaped ridges at both ends and the line connecting the vertices of the V-shaped ridges on both sides opposite to each other is collinear with the short diagonal line of the diamond protrusion.

[0012] Compared with the prior art, the utility model has a simple and reasonable structure. By arranging the connection between the sinker and the guide ridge, and the connection between the limit rib and the guide groove between the bottom plate and the matching plate, the connection strength between the bottom plate components is effectively improved; at the same time, the two heat exchange fluids in the heat exchanger directly impact the guide ridge of the bottom plate and the sinker surface above the bottom plate respectively, and the sinker surface is restrained on the bottom plate, which effectively avoids bulging or damage at the inflow point of the bottom plate corresponding to the fluid, so that the heat exchanger can withstand more than 100,000 fatigue tests without leakage; furthermore, the guide ridge on the bottom can force the inflowing fluid to converge to the heat exchange area, and cooperate with the heat exchange pattern arranged in a concentric diamond structure in the heat exchange area to increase the fluid turbulence, thereby effectively improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the separation structure of a bottom plate assembly of a plate heat exchanger of the utility model;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the base plate.

[0015] The following reference numerals are marked on the drawings in conjunction with the drawings:

[0016] 1. Bottom plate; 11. Guide area; 111. Guide ridge; 112. Guide channel; 12. Heat exchange area; 121. Diamond-shaped protrusion; 122. Diamond-shaped ridge; 123. W-shaped ridge; 124. V-shaped ridge; 2. Matching plate; 21. Boss; 211. Through hole; 22. Sink; 221. Limiting rib. DETAILED DESCRIPTION

[0017] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0018] The utility model discloses a bottom plate component of a plate heat exchanger such as Figure 1 As shown, the heat exchanger comprises a bottom plate 1 located at the bottom of the heat exchanger, and a matching plate 2 stacked on the bottom plate 1 and welded together. The bottom plate 1 and the matching plate 2 are adapted rectangular corrugated plate structures and support each other to form an inter-plate space for fluid flow. Specifically, the bottom plate 1 comprises a guide area 11 located at both ends of the long side, and a heat exchange area 12 located between the guide areas 11 at both ends. The guide area 11 is provided with a plurality of guide ridges 111 arranged at intervals, and the corresponding adjacent guide ridges 111 cooperate to form a heat exchange area 12 for fluid flow. The guide groove 112 is used to force the fluid to converge to the heat exchange area 12. Preferably, the guide ridges 111 are arranged parallel to the long side of the bottom plate 1, so that the guide groove 112 can more directly and effectively guide the fluid to the heat exchange area 12; the matching plate 2 is provided with bosses 21 that bulge upward and abut against the upper heat exchanger plate at two corresponding corners, and the two bosses 21 are provided with through holes 211 on the table surface so that a heat exchange fluid in the space between the upper plates can flow through the through holes 211 The fluid directly impacts the guide ridge 111 of the guide area 11 of the bottom plate 1, which can effectively prevent the bottom plate 1 from bulging or damage; the other two corners of the matching plate 2 are provided with a sink 22 that is concave downward and abuts against the guide ridge 111 on the bottom plate 1 below, and the surface of the sink 22 is correspondingly provided with a limiting rib 221 that is concave downward and placed in the guide channel 112 of the bottom plate 1 below and abuts against it, so that another heat exchange fluid in the heat exchanger is directly The impact is directly on the surface of the sinker 22 of the matching plate 2, and the double-layer constraint of the bottom plate 1 and the sinker 22 surface can effectively prevent bulging or damage at this location; at the same time, the connection between the bottom plate components is improved through the connection between the sinker 22 and the guide ridge 111, and the connection between the limiting rib 221 and the guide groove 112, which effectively improves the connection strength between the bottom plate components, allowing the heat exchanger to withstand more than 100,000 fatigue tests without leakage, thereby effectively ensuring the safety and service life of the heat exchanger.

[0019] In this embodiment, if Figure 1 As shown, the two bosses 21 on the mating plate 2 are respectively located at the corners at both ends of its long sides, which can optimize the flow of fluid in the inter-plate space of the base plate assembly and effectively disperse stress to effectively improve the pressure-bearing capacity between the base plate assemblies.

[0020] In this embodiment, if Figure 2 As shown, a heat exchange pattern in a concentric rhombus structure is provided in the heat exchange area 12 of the base plate 1, and the heat exchange pattern includes a rhombus-shaped protrusion 121 located in the center, at least one rhombus-shaped ridge 122 arranged around the outer periphery of the rhombus-shaped protrusion 121, and at least one W-shaped ridge 123 arranged at both ends of the rhombus-shaped ridge 122; the long diagonal of the rhombus-shaped protrusion 121 is arranged parallel to the long side of the base plate 1, and the openings of the W-shaped ridges 123 at both ends are arranged toward the short side and the V-shaped openings on the inner side are sleeved on the outer side of the rhombus corners of the rhombus-shaped ridge 122, so that the rhombus-shaped protrusion 121 in the center constitutes the central rhombus of the concentric rhombus structure, at least one rhombus-shaped ridge 122 constitutes the inner rhombus of the concentric rhombus structure, and the V-shaped openings on the inner sides of the W-shaped ridges 123 opposite to each other at both ends cooperate to constitute the outer rhombus of the concentric rhombus structure; the base plate 1 can effectively increase the turbulence in the space between the plates through the heat exchange pattern with a special structure thereon, thereby effectively improving the heat exchange effect in the plate space of the base plate assembly.

[0021] In the above scheme, it is further preferred that Figure 2 As shown, the heat exchange pattern also includes at least one V-shaped ridge 124 located between the spoiler ridges at both ends and arranged on both sides close to the long side, the two sides of the V-shaped ridge 124 are respectively parallel to the outer sides of the W-shaped ridge 123 at both ends, and the vertex line of the V-shaped ridge 124 opposite to each other on both sides is colinear with the short diagonal line of the diamond protrusion, thereby further improving the heat exchange effect.

[0022] Compared with the prior art, the utility model has a simple and reasonable structure. By arranging the connection between the sinker and the guide ridge, and the connection between the limit rib and the guide groove between the bottom plate and the matching plate, the connection strength between the bottom plate components is effectively improved; at the same time, the two heat exchange fluids in the heat exchanger directly impact the guide ridge of the bottom plate and the sinker surface above the bottom plate respectively, and the sinker surface is restrained on the bottom plate, which effectively avoids bulging or damage at the inflow point of the bottom plate corresponding to the fluid, so that the heat exchanger can withstand more than 100,000 fatigue tests without leakage; furthermore, the guide ridge on the bottom can force the inflowing fluid to converge to the heat exchange area, and cooperate with the heat exchange pattern arranged in a concentric diamond structure in the heat exchange area to increase the fluid turbulence, thereby effectively improving the heat exchange effect.

[0023] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A bottom plate assembly of a plate heat exchanger, characterized in that: It includes a bottom plate located at the bottom of the plate heat exchanger, and a matching plate stacked on the bottom plate and welded together; The bottom plate is a rectangular corrugated plate, and the bottom plate includes guide areas located at both ends of the long side, and a heat exchange area located between the guide areas at both ends. The guide areas at both ends are provided with a plurality of guide ridges arranged at intervals, and two adjacent guide ridges cooperate to form a guide channel for guiding the fluid to converge to the heat exchange area; The matching plate is a rectangular corrugated plate, and is provided with upwardly protruding bosses at two of its corresponding corners and downwardly recessed platforms abutting against the guide ridge on the bottom plate at the other two corners. Through holes are provided on the surfaces of the two bosses, and at least one limiting rib is correspondingly provided on the surfaces of the two recessed platforms, which is recessed downward and placed in the guide channel and abuts against it.

2. The bottom plate assembly of a plate heat exchanger according to claim 1, characterized in that: The plurality of guide ridges in the guide area are arranged parallel to the long side of the bottom plate.

3. The bottom plate assembly of a plate heat exchanger according to claim 1, characterized in that: The two sinks are respectively arranged at the corners at both ends of the long side of the matching plate.

4. The bottom plate assembly of a plate heat exchanger according to claim 1, characterized in that: A heat exchange pattern in a concentric diamond structure is arranged in the heat exchange area of ​​the bottom plate, and the heat exchange pattern includes a diamond-shaped protrusion located in the center, at least one diamond-shaped ridge arranged around the outer periphery of the diamond-shaped protrusion, and at least one W-shaped ridge arranged at both ends of the diamond-shaped ridge. The openings of the W-shaped ridges at both ends are arranged toward the short sides and the V-shaped openings on the inner side are arranged on the outer side of the diamond corners of the diamond-shaped ridge.

5. The bottom plate assembly of a plate heat exchanger according to claim 4, characterized in that: The long diagonal line of the diamond-shaped protrusion is arranged parallel to the long side of the bottom plate.

6. A bottom plate assembly of a plate heat exchanger according to claim 4 or 5, characterized in that: The heat exchange pattern also includes at least one V-shaped ridge located between the spoiler ridges at both ends and arranged on both sides close to the long side, the two sides of the V-shaped ridge are respectively parallel to the outer sides of the W-shaped ridges at both ends, and the line connecting the vertices of the V-shaped ridges on both sides opposite to each other is collinear with the short diagonal line of the diamond-shaped protrusion.

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