Heat exchange plate

Abstract

The utility model discloses a heat exchange plate, which belongs to the technical field of heat exchange, solves the problem that the strength of the heat exchange plate is affected due to low welding quality between heat exchange plates caused by multiple arcing and arc straightening of a welding gun, and adopts the technical scheme that the heat exchange plate mainly comprises two plates arranged side by side, and the two plates are welded and connected to form the heat exchange plate. Each heat exchange plate is provided with an inlet allowing a medium to enter and an outlet allowing the medium to flow out, a plurality of connecting pieces are formed at the welding positions of the two plates, a medium channel allowing the medium to be heated to flow is formed between every two adjacent connecting pieces, and the connecting pieces extend linearly. The welding quality of the heat exchange plate is mainly improved, and then the strength of the heat exchange plate is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchange, and in particular to a heat exchange plate. Background Technology

[0002] Industrial fuel combustion exhaust often contains a large amount of heat energy. Traditional methods of treatment involve directly releasing this heat-rich flue gas into the air through conventional boilers, resulting in significant waste of heat energy and the direct release of toxic substances into the air, causing direct environmental damage. With industrial development and increased energy awareness, improving energy efficiency has become crucial, leading to the emergence of heat exchangers that convert the heat from flue gas into water or air for reuse. The heat exchange principle involves channels within the heat exchange plates through which the medium to be heated flows. Heat-rich flue gas flows between the heat exchange plates, heating the medium and achieving heat exchange. The heated medium can then be drained out as needed.

[0003] Heat exchange plates are typically composed of two single plates. During assembly, brazing or laser welding is usually used to weld and fix the two plates together to form the heat exchange plate. The space between the two plates forms a medium channel for the flow of the medium. In some plate air preheaters made of relatively high-hardness materials, the welding is done through spot-forming weld rings, which cannot expand to form the required wave height. This is because the high hardness of these plates results in poor ductility, making it difficult to balance the strength of the heat exchange plate with the flow space of the air chamber during manufacturing. When a larger flow space is needed, the number of spot weld rings is reduced while the spacing between them is increased, thus increasing the flow space. However, reducing the number of spot weld rings leads to a decrease in the connection strength between adjacent plates. Conversely, to increase the strength of the heat exchange plate, the number of spot weld rings is usually increased, which leads to a reduction in the distance between the spot weld rings, resulting in a decrease in the plate's bulge height, a reduction in the air chamber space, a decrease in the flow of air, and a decrease in overall heat exchange efficiency.

[0004] When processing heat exchange plates, it is necessary to form dotted weld rings. Therefore, the welding torch must go through one arc starting and stopping after each weld ring is completed. The welding torch needs to start and stop the arc multiple times to complete the processing of a heat exchange plate. The continuous arc starting and stopping of the welding torch can easily lead to uneven start and end of the formed dotted weld rings, resulting in poor welding quality between single plates, which in turn affects the strength of the heat exchange plate. Utility Model Content

[0005] The purpose of this invention is to provide a heat exchange plate that solves the problem of poor welding quality between heat exchange plates due to multiple arc initiation and arc withdrawal of the welding torch, which affects the strength of the heat exchange plate, thereby improving the welding quality of the heat exchange plate and thus improving the strength of the heat exchange plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heat exchange plate, comprising two plates arranged side by side, the two plates being welded together to form a heat exchange plate, the heat exchange plate having an inlet for medium to enter and an outlet for medium to flow out, the welding position of the two plates forming a connector, the connector having multiple connectors, a medium channel for the medium to be heated to flow being formed between adjacent connectors, the connector extending in a straight line.

[0007] After adopting the above technical solution, this utility model has the following advantages: Two plates are combined and then welded together to form a heat exchange plate. The unwelded portion between the two plates forms a medium channel to accommodate the medium to be heated, facilitating the medium's retention and heating within the two plates. After welding, the heat exchange plate has an inlet for the medium to be heated and an outlet for the heated medium to flow out, ensuring the medium remains in a flowing state and can be continuously heated, thus improving the efficiency of the heat exchange plate. When welding the two plates, the welded joint forms a connecting part, which on the one hand increases the strength of the heat exchange plate and prevents it from bridging the gap. The hot plate may deform or be damaged during contact with high-temperature flue gas; on the other hand, a medium channel is formed between adjacent connecting parts, allowing the medium to flow along the medium channel. The flow of the medium facilitates the discharge of the heated medium and the introduction of the medium to be heated, thereby improving the heat exchange efficiency of the heat exchange plate; and the formed medium channel allows the medium to flow from the inlet to the outlet within the channel, avoiding the medium from becoming chaotic in the medium channel and affecting the heat exchange efficiency of the heat exchange plate; the connecting parts extend in a straight line between the two plates, greatly reducing the number of arc starting and stopping times of the welding torch during the welding process, thereby avoiding the problem of uneven welding caused by arc starting and stopping, thus improving the welding quality of the two plates, and thus improving the quality of the heat exchange plate.

[0008] Furthermore, the adjacent connectors are located close to the opposite sides of the plate, and all connectors are located between the inlet and the outlet.

[0009] By adopting the aforementioned technical solution, when welding the two plates, the two adjacent connecting parts formed after cooling are close to the opposite sides of the plates, making the medium channel serpentine, increasing the length of the flow path of the medium between the heat exchange plates, and increasing the heat exchange time of the medium in the heat exchange plates while keeping the flow speed of the medium constant, thereby improving the heat exchange efficiency between the medium and the high-temperature flue gas.

[0010] Furthermore, an auxiliary connector is provided between the two plates to enhance the connection strength between the two plates, and the auxiliary connector is located within the medium channel.

[0011] By adopting the aforementioned technical solution, an auxiliary connector is added inside the medium channel to connect the two plates at the medium channel, thereby increasing the connection strength between the two plates at the medium channel and reducing the possibility of damage or even breakage of the heat exchange plate at the medium channel due to lack of support during the heat exchange process.

[0012] Furthermore, the auxiliary connector includes a first connecting portion and a second connecting portion, the first connecting portion being parallel to the connector, and the second connecting portion being located between the connector and the side edge of the plate.

[0013] By adopting the aforementioned technical solution, the auxiliary connection is configured as a first connection and a second connection. The first connection is located within the medium channel and parallel to the connector, thereby increasing the strength of the plate between two adjacent connectors and preventing damage between the connector and the plate after the medium expands due to heat. Since the two adjacent connectors face opposite sides of the plate, there is a large gap between the end of the connector and the side of the plate. The second connection is located within this large gap between the end of the connector and the side of the plate, increasing the strength of the plate at the end of the connector and the side of the plate, thereby improving the overall strength of the plate and the quality of the heat exchange plate.

[0014] Furthermore, the first connecting portion includes multiple first connecting segments that are parallel to the connecting member and are intermittently arranged, with gaps formed at the intermittent positions.

[0015] By adopting the aforementioned technical solution, the first connection part is configured as a combination of multiple first connection segments. By distributing multiple first connection segments within the medium channel, the connection strength between the two plates is improved, and the possibility of damage to the plates after the medium expands due to heat is avoided. The first connection segments are intermittently arranged, so that gaps are formed at the discontinuous positions. This allows the medium to flow between the multiple first connection segments within the medium channel for uniform distribution when the first connection segments are present. After the medium is relatively uniformly distributed, the two plates within the medium channel experience relatively uniform stress at various points during the heat exchange process, reducing the possibility of damage to the plates due to uneven stress.

[0016] Furthermore, the second connecting part includes multiple second connecting segments, which connect adjacent first connecting segments and are respectively connected to multiple first connecting segments, and each second connecting segment has a gap in the middle part.

[0017] Using the aforementioned technical solution, the second connecting part also includes multiple second connecting segments. The second connecting segments are distributed at the ends of the connector and the sides of the plate, which improves the connection strength between the multiple second connecting segments and the two plates. The middle part of the second connecting segments is provided with a gap to facilitate the uniform distribution of the medium at the second connecting part, thereby ensuring that the temperature of the medium after heating is relatively uniform and improving the heat exchange efficiency of the medium at the second connecting part. At the same time, the relatively uniform distribution of the medium makes the plate at the second connecting part bear relatively uniform stress, reducing the possibility of damage to the plate.

[0018] Furthermore, the second connecting segment is an arc-shaped rod.

[0019] By adopting the aforementioned technical solution, the second connecting section is set as an arc-shaped rod, so that the connection between the first connecting section and the second connecting section and the medium flow path at the second connecting section are arc-shaped. When the medium flows from the first connecting section to the second connecting section, it flows along the arc of the second connecting section, avoiding the medium from being stuck at the corner of the connection between the first connecting section and the second connecting section, which would affect the heat exchange efficiency of the heat exchange plate.

[0020] Furthermore, a transition piece is provided between the first connecting segment and the second connecting segment, and the transition piece is an arc-shaped piece.

[0021] By adopting the aforementioned technical solution, a transition piece is provided between the first connecting section and the second connecting section, and the transition piece is an arc-shaped piece. The first connecting section and the second connecting section are connected by the arc-shaped piece, so as to avoid the presence of corners at the connection between the first connecting section and the second connecting section, thereby avoiding the possibility of medium stagnation at the connection between the first connecting section and the second connecting section, which may affect the heat exchange efficiency of the heat exchange plate.

[0022] Furthermore, the inlet and outlet are located on the same side of the heat exchange plate and are respectively located on both sides of all the connecting parts.

[0023] By adopting the aforementioned technical solution, the inlet and outlet of the heat exchange plate are set on the same side of the heat exchange plate and distributed on both sides of all the connecting parts. The medium to be heated entering from the inlet must bypass all the connecting parts and flow out from the outlet, which prolongs the flow path of the medium in the heat exchange plate and improves the heat exchange efficiency of the heat exchange plate while keeping the medium flow speed constant.

[0024] Furthermore, the inlet and outlet are located on opposite sides of the heat exchange plate and are staggered, with the inlet and outlet located on opposite sides of the connector.

[0025] By adopting the aforementioned technical solution, the inlet and outlet are set on opposite sides of the heat exchange plate. With the connector extending in a straight line, the inlet and outlet are staggered to extend the flow path of the medium, thereby improving the heat exchange efficiency of the heat exchange plate. By setting the inlet and outlet on opposite sides of the connector, it is ensured that the medium to be heated has a longer flow path in the medium channel, thus ensuring the heat exchange efficiency of the heat exchange plate. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of a heat exchange plate according to the present invention;

[0028] Figure 2 This is a schematic diagram of the import and export structures in this utility model;

[0029] Figure 3 This is a schematic diagram of the auxiliary connecting component in this utility model;

[0030] Figure 4 This is a schematic diagram of the second connecting section being an arc-shaped rod in this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the adapter in this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0033] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0034] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0035] like Figure 1 As shown, this utility model provides a heat exchange plate, including two plates 1 arranged side by side. The two plates 1 are welded together to form a heat exchange plate. A connecting member 2 is formed at the welding position of the two plates 1. The connecting member 2 is formed by welding to ensure the connection strength of the two plates 1. The connecting member 2 extends in a straight line to improve the stability of the welding, thereby improving the welding quality and efficiency. There are multiple connecting members 2, which together connect the two plates 1, improving the connection strength of the two plates 1 and thus improving the connection quality of the two plates 1. After the connecting member 2 is formed by welding, a medium channel 13 for the flow of the medium to be heated is formed between two adjacent connecting members 2. When using the heat exchange plate, the medium to be heated flows in the medium channel 13. The medium can exchange heat with the high-temperature flue gas outside the heat exchange plate through the heat exchange plate. During the heat exchange process, the medium heats up and the flue gas cools down, thereby converting the heat energy in the flue gas into the medium for reuse. In addition, when welding the two plates 1, the connecting member 2 extends in a straight line, which greatly reduces the number of times the welding torch starts and stops the arc, thereby reducing the impact of the welding torch starting and stopping the arc on the welding quality of the heat exchange plate and improving the strength of the heat exchange plate.

[0036] In this embodiment, as Figure 1 and Figure 2 As shown, the heat exchange plate has an inlet 11 for the medium to be heated to enter and an outlet 12 for the heated medium to exit. Both inlet 11 and outlet 12 are connected to a medium channel 13. During use, the medium enters the medium channel 13 from inlet 11. As the medium flows along the flow path within the medium channel 13, it is gradually heated. The heated medium exits from outlet 12 for direct use or storage for later use. Specifically, as... Figure 2 As shown, the length of the connector 2 in the left-right direction is denoted as L1, and the width of the plate 1 in the left-right direction is denoted as L2. L1 is less than L2 and L1 is greater than three-quarters of L2, so that there is a gap between the end of the connector 2 and the side of the plate 1. Two adjacent connectors 2 are close to the opposite sides of the plate 1, so that the gap between the end of the connector 2 and the side of the plate 1 is also the medium channel 13. When there are multiple connectors 2, the medium channel 13 is serpentine, which lengthens the path of the medium in the heat exchange plate. With the medium flow velocity remaining constant, the increased path lengthens the heating time of the medium, increases the temperature of the medium when it flows out of the outlet 12, and thus improves the heat exchange efficiency of the heat exchange plate.

[0037] like Figure 1 and Figure 3As shown, the inlet 11 and outlet 12 on the heat exchange plate can be located on the same side of the heat exchange plate. In this case, the inlet 11 and outlet 12 are respectively located on both sides of all connecting parts 2, ensuring that the medium has a longer flow path in the heat exchange plate; the positions of the inlet 11 and outlet 12 can also be adjusted according to the other equipment connected to the heat exchange plate; in another embodiment, such as Figure 2 As shown, when the other equipment is on the left and right sides of the heat exchange plate, the inlet 11 and outlet 12 can also be located on opposite sides of the heat exchange plate, and the inlet 11 and outlet 12 are located on the two sides of the connector 2 respectively, to ensure that the medium flow path is longer to improve the heat exchange efficiency of the heat exchange plate.

[0038] In another embodiment, such as Figure 3 As shown, there is an auxiliary connector 3 between the two plates 1 to strengthen the connection between the two plates 1. The auxiliary connector 3 is also formed after welding the two plates 1. The auxiliary connector 3 is located in the medium channel 13 to improve the connection strength between the two plates 1 at the medium channel 13 position and avoid the possibility of deformation or damage to the plates 1 during the heating process of the medium in the medium channel 13.

[0039] Specifically, such as Figure 3 As shown, the auxiliary connector 3 includes a first connecting part 31 and a second connecting part 32. The first connecting part 31 is parallel to the connector 2. More specifically, the first connecting part 31 includes multiple first connecting segments, all of which are parallel to the connector 2. Each of the multiple first connecting segments has multiple breaks along the length of the connector 2. Each break forms a gap on the first connecting segment. Due to the presence of the first connecting segments, the original medium channel 13 is divided into multiple sub-channels, which can easily cause uneven distribution of the medium within the medium channel 13. The presence of gaps allows the multiple sub-channels to communicate with each other, enabling the medium to be distributed more evenly within the multiple sub-channels. This improves the uniformity of the medium distribution in the medium channel 13 when the first connecting segments are present, thereby reducing the possibility of damage to the plate due to uneven medium distribution. The second connecting part 32 is located in the gap between the connector 2 and the side of the plate 1. The second connecting part 32 includes multiple second connecting segments. One end of the second connecting segment is connected to a first connecting segment on one side, and the other end is connected to another first connecting segment on the other side of the medium channel 13. The multiple second connecting segments are respectively connected to the multiple first connecting segments. The middle part of each second connecting segment is provided with a gap to improve the uniformity of medium distribution in the medium channel 13 at the second connecting segment.

[0040] To prevent the medium from getting stuck at the connection point between the first and second connecting sections, such as Figure 4As shown, the second connecting section is set as an arc-shaped rod. The arc-shaped rod makes the connection between the second connecting section and the first connecting section smoother, avoiding the presence of corners at the connection point that could cause medium stagnation, and improving the smoothness of medium flow in the heat exchange plate.

[0041] In another embodiment, such as Figure 5 As shown, to prevent media stagnation at the connection point between the first and second connecting sections, a transition piece 33 is provided between them. This transition piece 33 is arc-shaped, which makes the transition between the first and second connecting sections smoother, preventing media stagnation at corners and improving the smoothness of media flow in the heat exchange plate. Both ends of the second connecting section are connected to the first connecting section via the transition piece 33, further reducing the possibility of media stagnation at the connection point between the second and first connecting sections.

[0042] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A heat exchange plate comprising two plates arranged side by side, the two plates being welded together to form a heat exchange plate, the heat exchange plate having an inlet for medium entry and an outlet for medium exit, characterized in that, The welding position of the two plates forms a connector, and there are multiple connectors. A medium channel for the flow of the medium to be heated is formed between two adjacent connectors, and the connectors extend in a straight line.

2. The heat exchange plate according to claim 1, characterized in that, The adjacent connectors are located close to the opposite sides of the plate, and all connectors are located between the inlet and the outlet.

3. The heat exchange plate according to claim 1, characterized in that, An auxiliary connector is provided between the two plates to enhance the connection strength between them, and the auxiliary connector is located within the medium channel.

4. The heat exchange plate according to claim 3, characterized in that, The auxiliary connector includes a first connecting part and a second connecting part. The first connecting part is parallel to the connector, and the second connecting part is located between the connector and the side of the plate.

5. The heat exchange plate according to claim 4, characterized in that, The first connecting part includes multiple first connecting segments that are parallel to the connecting member and are intermittently arranged, with gaps formed at the intermittent positions.

6. The heat exchange plate according to claim 5, characterized in that, The second connecting part includes multiple second connecting segments, which connect adjacent first connecting segments and are respectively connected to multiple first connecting segments. Each second connecting segment has a gap in the middle part.

7. The heat exchange plate according to claim 6, characterized in that, The second connecting section is an arc-shaped rod.

8. The heat exchange plate according to claim 6, characterized in that, A transition piece is provided between the first connecting segment and the second connecting segment. The transition piece is an arc-shaped piece.

9. The heat exchange plate according to claim 2, characterized in that, The inlet and outlet are located on the same side of the heat exchange plate and are respectively located on both sides of all the connecting parts.

10. The heat exchange plate according to claim 2, characterized in that, The inlet and outlet are located on opposite sides of the heat exchange plate and are staggered, with the inlet and outlet located on opposite sides of the connector.

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