CN113154911B - Cover plate for plate heat exchanger and plate heat exchanger - Google Patents
Cover plate for plate heat exchanger and plate heat exchanger Download PDFInfo
- Publication number
- CN113154911B CN113154911B CN202010076024.0A CN202010076024A CN113154911B CN 113154911 B CN113154911 B CN 113154911B CN 202010076024 A CN202010076024 A CN 202010076024A CN 113154911 B CN113154911 B CN 113154911B
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- groove
- cover plate
- heat exchanger
- plate
- flange
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The embodiment of the invention discloses a cover plate for a plate heat exchanger and the plate heat exchanger with the cover plate. This apron includes: a cover body having first and second sides in a direction perpendicular to the cover body, and first and second surfaces facing the first and second sides, respectively; and a groove formed on at least one of the first and second surfaces of the cap body by pressing. According to the cover plate and the plate heat exchanger of the embodiment of the invention, the quality of the plate heat exchanger can be improved.
Description
Technical Field
Embodiments of the present invention relate to a cover plate for a plate heat exchanger and to a plate heat exchanger.
Background
The plate heat exchanger includes cover plates such as a front cover plate and a rear cover plate, heat exchange plates between the front cover plate and the rear cover plate, connection pipes, and the like.
Disclosure of Invention
It is an object of embodiments of the invention to provide a cover plate for a plate heat exchanger and a plate heat exchanger with such a cover plate, whereby the quality of the plate heat exchanger can be improved, for example.
According to an embodiment of the invention, there is provided a cover plate for a plate heat exchanger, comprising: a cover body having first and second sides in a direction perpendicular to the cover body, and first and second surfaces facing the first and second sides, respectively; and a groove formed on at least one of the first and second surfaces of the cap body by pressing.
According to an embodiment of the invention, said cover plate for a plate heat exchanger further comprises: an annular flange projecting from an edge of the cover body toward one of the first and second sides, wherein the groove comprises a first groove adjacent the flange, the first groove extending along at least a portion of a length of the flange.
According to an embodiment of the invention, the first groove comprises a plurality of discrete first groove segments.
According to an embodiment of the invention, the first groove extends along the entire length of the flange and has an annular shape.
According to an embodiment of the invention, the first groove has two opposite side wall faces, and one of the two side wall faces is formed by a surface of the flange.
According to an embodiment of the invention, the groove further comprises a second groove on a side of the first groove remote from the flange and spaced apart from the first groove, the second groove extending along at least a part of the length of the flange.
According to an embodiment of the invention, the second groove comprises a plurality of discrete second groove segments.
According to an embodiment of the invention, the second groove extends along the entire length of the flange and has an annular shape.
According to an embodiment of the present invention, a corner portion formed by a surface of the flange and a bottom wall surface of the first groove has an arc shape.
According to an embodiment of the present invention, the groove further includes a third groove provided at a middle portion in a length direction of the cap main body.
According to an embodiment of the present invention, the third groove extends in a width direction of the cap body.
According to an embodiment of the present invention, the grooves further include a plurality of third grooves provided at a middle portion in a length direction of the cap body, and the plurality of third grooves are arranged in a matrix form.
According to an embodiment of the present invention, the grooves further include a plurality of third grooves, the plurality of third grooves are provided in a middle portion of the cap body in a length direction, and the plurality of third grooves extend obliquely and radially with respect to a width direction of the cap body.
According to an embodiment of the present invention, the grooves further include a plurality of third grooves, the plurality of third grooves are provided at a middle portion in a length direction of the cover main body, and the plurality of third grooves are symmetrically arranged with respect to a center line in the length direction of the cover main body and a center line in a width direction of the cover main body.
According to an embodiment of the invention, the groove is formed on the first surface and the flange projects towards the first side.
According to an embodiment of the invention, the depth of the groove is 6% to 8% of the thickness of the sheet material from which the cover plate is made, and the width of the groove is 2 times to 4 times the thickness of the sheet material from which the cover plate is made.
There is also provided, in accordance with an embodiment of the present invention, a plate heat exchanger, including: the heat exchanger comprises a front cover plate and a rear cover plate, wherein at least one of the front cover plate and the rear cover plate is the cover plate, and a plurality of heat exchange plates are arranged between the front cover plate and the rear cover plate.
The cover plate and the plate heat exchanger according to embodiments of the invention may, for example, improve the quality of the plate heat exchanger.
Drawings
Fig. 1 is a schematic perspective view in section of a portion of a cover plate of a plate heat exchanger according to an embodiment of the invention;
fig. 2 is a schematic perspective cross-sectional view of a part of a cover plate of a plate heat exchanger according to another embodiment of the invention;
fig. 3 is a schematic view of a cover plate of a plate heat exchanger according to yet another embodiment of the invention;
fig. 4 is a schematic view of a cover plate of a plate heat exchanger according to yet another embodiment of the invention; and
fig. 5 is a schematic view of a cover plate of a plate heat exchanger according to a further embodiment of the invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Referring to fig. 1 to 5, a plate heat exchanger according to an embodiment of the present invention includes: front and rear cover plates, and a plurality of heat exchange plates 10 disposed therebetween.
The plate heat exchanger cover plate 2 according to an embodiment of the invention will be described below by way of example with a front cover plate, which may be substantially identical in construction to the front cover plate, except that it may not have openings for connection with connecting pipes or the like.
Referring to fig. 1 to 5, a cover plate 2 for a plate heat exchanger according to an embodiment of the present invention includes: a cover main body 20, the cover main body 20 having a first side and a second side in a direction perpendicular to the cover main body 20, and a first surface 21 and a second surface 23 facing the first side and the second side, respectively; and a groove 3 formed on at least one of the first surface 21 and the second surface 23 of the cap body 20 by pressing. In the embodiment shown the recess 3 is formed in the first surface 21. However, the recess 3 may also be provided on a second surface 23 opposite said first surface 21. The recess 3 is pressed out of the first surface 21 of the cover body 20 by a die, for example, by means of a press. The thickness of the plate at the groove 3 is smaller than that of the cover plate body 20. The depth of the grooves 3 is 6 to 8% of the thickness of the sheet material from which the cover plate 2 is made, and the width of the grooves 3 is 2 to 4 times the thickness of the sheet material from which the cover plate 2 is made. Referring to fig. 1 and 2, the groove 3 may have an arcuate cross-section or a rectangular cross-section. Further, the groove 3 may have a rectangular cross section, and at least one of the bottom wall face 30 and the side wall face 31 of the groove 3 may be connected by a circular arc. The circular arc may be a circular curved surface, an elliptical curved surface, or the like. There may be any suitable flat, curved connection between the bottom wall surface 30 of the recess 3 and at least one of the side wall surfaces 31.
Referring to fig. 1-5, in some embodiments of the invention, the cover plate 2 further comprises: an annular flange 22 projecting (e.g., obliquely projecting) from an edge of the cover main body 20 toward one of the first side and the second side. For example, the groove 3 is formed on the first surface 21, and the flange 22 protrudes toward the first side. The groove 3 comprises a first groove 3A adjacent to the flange 22, the first groove 3A extending along at least a part of the length of the flange 22. For example, the first groove 3A comprises a plurality of discrete first groove segments, or the first groove 3A may extend along the entire length of the flange 22 and have an annular shape. For example, the corner formed by the surface 220 of the flange 22 and the bottom wall surface 30 of the first groove 3A has an arc shape.
Referring to fig. 1 to 5, the first groove 3A has two opposing side wall surfaces 31, and one 31 of the two side wall surfaces 31 is formed by a surface 220 of the flange 22. As shown in fig. 2, the groove 3 further comprises a second groove 3B, the second groove 3B being spaced from the first groove 3A on a side of the first groove 3A remote from the flange 22, the second groove 3B extending along at least a portion of the length of the flange 22. For example, the second groove 3B comprises a plurality of discrete second groove segments, or the second groove 3B extends along the entire length of the flange 22 and has an annular shape.
Referring to fig. 1 to 5, the cover main body 20 may have a substantially rectangular shape. The groove 3 further comprises a third groove 3C, and the third groove 3C can be arranged in an uneven area of the cover plate main body to improve the flatness of the plate. When the groove is pressed, the thickness of the plate or the plate is thinned to cause the change of local density, so that internal stress is formed, the release deformation generated by the stress counteracts the resilience caused by the anisotropy coefficient of the material, the purpose of adjusting the plane flatness of the cover plate main body 20 is achieved, and the deformation direction is controlled when the high-temperature stress is released. Meanwhile, the value of the release stress is adjusted by controlling the selection of the thinning coefficient, so that the welding quality between the cover plate and the adjacent heat exchange plate is improved. For example, one or more third grooves 3C are provided in the middle of the cover main body 20 in the length direction. Taking stainless steel as an example, the stainless steel material forming the cover plate is formed by one-step thinning of a stainless steel block, the fiber rolling direction thereof is along the length direction of the cover plate, and the length in the length direction is long, so that the deformation is easier, and therefore, as shown in fig. 3, one or more third grooves 3C may extend in the width direction of the cover plate main body 20. The plurality of third grooves 3C are arranged in a matrix form as shown in fig. 5, or the plurality of third grooves 3C extend obliquely and radially with respect to the width direction of the cap body 20 as shown in fig. 4. Referring to fig. 3, 4, and 5, the plurality of third grooves 3C may be symmetrically arranged with respect to a center line in the length direction of the cover main body 20 and a center line in the width direction of the cover main body. Further, the arrangement of the plurality of third grooves 3C may be selected as appropriate according to actual requirements, and the arrangement of the plurality of third grooves 3C is not limited to the embodiment shown in the drawings.
In fig. 1 and 2, a first groove 3A, a second groove 3B, and a third groove 3C are concavely formed on the first surface 21, and a flange 22 protrudes toward the first side (toward the side where the first groove 3A, the second groove 3B, and the third groove 3C are provided). It will be appreciated that one or more of the first grooves 3A, the second grooves 3B, and the third grooves 3C may also be provided on the second surface 23.
Referring to fig. 3 to 5, in some embodiments of the present invention, the cap plate 2 further includes four first holes 55 respectively formed at four corners of the cap plate body 20, and a plurality of third grooves 3C are provided between two of the four first holes 5 at one side (e.g., the left side in fig. 3 to 5) in the length direction of the cap plate body 20 and two of the four first holes 5 at the other side (e.g., the right side in fig. 3 to 5) in the length direction of the cap plate body 20. The first hole 5 is used to provide a connection pipe of the heat exchanger. The third groove 3C may have a strip shape, a rectangular shape, or the like.
Referring to fig. 4, in some embodiments of the present invention, a plurality of third grooves 3C are disposed in the middle of the cover plate body 20 in the length direction, and the plurality of third grooves 3C include a circular third groove disposed in the central region of the cover plate body 20 and a plurality of stripe-shaped third grooves radially disposed around the circular third groove.
The cap plate 2 according to an embodiment of the present invention can improve the welding quality of the heat exchanger, avoiding springback or deformation due to stress relief caused by high temperature during brazing or welding. Often this spring back or deformation will cause weld defects.
According to an embodiment of the invention, the grooves 3 are capable of changing the springback or deformation of the cover plates 2 due to stress relief caused by high temperatures during brazing or welding, so that the brazing or welding between the first heat exchanger plate 10 and the front cover plate and between the rear cover plate and the last heat exchanger plate 10 is more stable.
The cover plate 2 is formed from a flat plate with a flange 22 that is formed to spring back partially outward. Taking stainless steel as an example, different stainless steel coils may have different hardness, drawing coefficients and the like, so that the springback angles of different cover plates may be different, the consistency of products is poor, and welding is further affected. According to an embodiment of the present invention, referring to fig. 1, the provision of the first groove 3A may cause the flange 22 of the cover plate 2 to rebound or deform inwardly, resulting in better product consistency. But also the first groove 3A can change the springback or deformation of the flange 22 of the cap plate 2 due to stress relief caused by high temperature during brazing or welding, and the flange 22 will spring back outward without providing the first groove 3A, whereas according to an embodiment of the present invention, the flange 22 of the cap plate 2 springs back or deforms inward due to providing the first groove 3A, as shown by the dotted line in fig. 2, whereby the welding spot on the flange 22 of the cap plate 2 is more stable. Referring to fig. 2, to further enhance the effect of the inward springing or deformation of the flange 22, one or more second grooves 3B may be provided.
After the cover plate 2 is formed, there is usually some deformation of the body of the cover plate 2, particularly in its central region, due to various factors. This may be disadvantageous for the welding of the cover plate and the heat exchanger plate adjacent thereto. According to an embodiment of the present invention, referring to fig. 2, the third groove 3C can make the cover plate more flat, which facilitates the welding of the cover plate and the heat exchange plate adjacent thereto. In addition, the cover plate 2 is deformed or rebounded due to stress relief caused by high temperature during brazing or welding, and the middle area of the cover plate body 20 is deformed in a direction away from the heat exchange plate 10 without providing the third groove 3C, whereas according to an embodiment of the present invention, stress is relieved in an opposite direction due to providing the third groove 3C, whereby, as shown in fig. 2, the middle area of the cover plate body 20 of the cover plate 2 is not deformed, whereby the welding point of the middle area of the cover plate 2 is more stable, and the flatness of the cover plate body 20 of the cover plate 2 is ensured.
According to the embodiment of the present invention, the welding quality of the cover plate 2 can be effectively improved, the shape of the cover plate 2 is more stable, and the gap between the cover plate and the heat exchange plate can be easily adjusted.
It is noted that features from one or more of the embodiments described above may be combined into new embodiments. Features from one embodiment may be used with another embodiment unless the feature in one embodiment conflicts with a technical solution of the other embodiment.
Claims (17)
1. A cover plate for a plate heat exchanger, comprising:
a cover body having first and second sides in a direction perpendicular to the cover body, and first and second surfaces facing the first and second sides, respectively; and
a groove formed on one of the first and second surfaces of the cap body by thinning a thickness of a portion of the cap body corresponding to the groove by pressing and varying a density of the portion of the cap body corresponding to the groove while a portion of the other of the first and second surfaces corresponding to the groove remains unchanged.
2. A cover plate for a plate heat exchanger according to claim 1, further comprising:
an annular flange projecting from an edge of the cover body toward one of the first and second sides,
wherein the groove comprises a first groove adjacent the flange, the first groove extending along at least a portion of the length of the flange.
3. A cover plate for a plate heat exchanger according to claim 2, wherein:
the first groove includes a plurality of discrete first groove segments.
4. A cover plate for a plate heat exchanger according to claim 2, wherein:
the first groove extends along the entire length of the flange and has an annular shape.
5. A cover plate for a plate heat exchanger according to any one of claims 2 to 4 wherein:
the first groove has opposite side wall faces, and one of the two side wall faces is formed by a surface of the flange.
6. A cover plate for a plate heat exchanger according to claim 2 wherein:
the groove further comprises a second groove on a side of the first groove remote from the flange and spaced from the first groove, the second groove extending along at least a portion of the length of the flange.
7. The cover plate for a plate heat exchanger of claim 6 wherein:
the second groove comprises a plurality of discrete second groove segments.
8. The cover plate for a plate heat exchanger according to claim 6, wherein:
the second groove extends along the entire length of the flange and has an annular shape.
9. The cover plate for a plate heat exchanger of claim 5 wherein:
a corner formed by a surface of the flange and a bottom wall surface of the first groove has an arc shape.
10. A cover plate for a plate heat exchanger according to claim 1, wherein:
the groove further comprises a third groove which is arranged in the middle of the cover plate main body in the length direction.
11. A cover plate for a plate heat exchanger according to claim 10 wherein:
the third groove extends in the width direction of the cover plate main body.
12. A cover plate for a plate heat exchanger according to claim 1 wherein:
the grooves further include a plurality of third grooves provided in the middle in the length direction of the cover plate main body, and
the plurality of third grooves are arranged in a matrix form.
13. A cover plate for a plate heat exchanger according to claim 1, wherein:
the grooves further include a plurality of third grooves provided in the middle in the length direction of the cover plate main body, and
the third grooves extend obliquely and radially with respect to the width direction of the cover plate body.
14. A cover plate for a plate heat exchanger according to claim 1, wherein:
the grooves further include a plurality of third grooves provided in the middle in the length direction of the cover plate main body, and
the plurality of third grooves are arranged symmetrically with respect to a center line in the length direction of the cover main body and a center line in the width direction of the cover main body.
15. The cover plate for a plate heat exchanger according to claim 5, wherein:
the groove is formed on the first surface, and the flange protrudes toward the first side.
16. A cover plate for a plate heat exchanger according to claim 1 wherein:
the depth of the groove is 6 to 8% of the thickness of the plate material from which the cover plate is made, and the width of the groove is 2 to 4 times the thickness of the plate material from which the cover plate is made.
17. A plate heat exchanger comprising:
a front cover plate and a rear cover plate, at least one of which is the cover plate of any one of claims 1 to 16, and
a plurality of heat exchange plates disposed between the front cover plate and the rear cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010076024.0A CN113154911B (en) | 2020-01-22 | 2020-01-22 | Cover plate for plate heat exchanger and plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010076024.0A CN113154911B (en) | 2020-01-22 | 2020-01-22 | Cover plate for plate heat exchanger and plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113154911A CN113154911A (en) | 2021-07-23 |
| CN113154911B true CN113154911B (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010076024.0A Active CN113154911B (en) | 2020-01-22 | 2020-01-22 | Cover plate for plate heat exchanger and plate heat exchanger |
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| Country | Link |
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| CN (1) | CN113154911B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872578A (en) * | 1988-06-20 | 1989-10-10 | Itt Standard Of Itt Corporation | Plate type heat exchanger |
| JP2000074591A (en) * | 1998-08-31 | 2000-03-14 | Toyo Radiator Co Ltd | Overlapped drawn cup heat exchanger |
| CN101646915A (en) * | 2007-02-26 | 2010-02-10 | 阿尔法拉瓦尔股份有限公司 | Plate heat exchanger |
| EP2267391A2 (en) * | 2009-06-26 | 2010-12-29 | SWEP International AB | Asymmetric heat exchanger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009012784A1 (en) * | 2009-03-13 | 2010-09-16 | Behr Gmbh & Co. Kg | Heat exchanger |
| AT508537B1 (en) * | 2009-07-16 | 2011-04-15 | Mahle Int Gmbh | PLATE HEAT EXCHANGERS WITH MULTIPLE STACKED PLATES |
| US20140196870A1 (en) * | 2013-01-17 | 2014-07-17 | Hamilton Sundstrand Corporation | Plate heat exchanger |
| US20140352934A1 (en) * | 2013-05-28 | 2014-12-04 | Hamilton Sundstrand Corporation | Plate heat exchanger |
-
2020
- 2020-01-22 CN CN202010076024.0A patent/CN113154911B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872578A (en) * | 1988-06-20 | 1989-10-10 | Itt Standard Of Itt Corporation | Plate type heat exchanger |
| JP2000074591A (en) * | 1998-08-31 | 2000-03-14 | Toyo Radiator Co Ltd | Overlapped drawn cup heat exchanger |
| CN101646915A (en) * | 2007-02-26 | 2010-02-10 | 阿尔法拉瓦尔股份有限公司 | Plate heat exchanger |
| EP2267391A2 (en) * | 2009-06-26 | 2010-12-29 | SWEP International AB | Asymmetric heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN113154911A (en) | 2021-07-23 |
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