Processing method of gas-to-gas heat exchange device

Abstract

The present invention relates to the technical field of heat exchange devices and specifically discloses a method for processing an air-to-air heat exchange device. This method bends a thin metal plate into an inner plate similar to a channel steel structure. Positioning rods are passed through a plurality of inner plates arranged in a certain sequence, and then the inner plates are clamped and secured by side plates. Once the side plates and all inner plates are relatively fixed, the gaps between the inner plates and the gaps between the inner plates and the side plates are welded, thereby facilitating the processing of the air-to-air heat exchange device.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange devices, and in particular to a processing method of an air-to-air heat exchange device. Background Art

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. Heat exchangers play a vital role in chemical, petroleum, power, food, and many other industrial processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, among other applications.

[0003] The horizontal and vertical arrangement of hot and cold channels is widely used in air-to-air heat exchangers. For example, patent application CN217483315U discloses a heat exchanger with horizontal and vertical arrangements of hot and cold channels. However, the heat exchange structure of this heat exchanger is a one-piece structure, which becomes very complicated to manufacture when there are a large number of hot and cold channels.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The invention discloses a method for processing an air-to-air heat exchange device, which is used to improve the problem of complicated processing of the air-to-air heat exchange device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for processing an air-to-air heat exchange device, comprising:

[0008] S1: Take a rectangular thin metal plate, bend the edges of the metal plate on two opposite sides toward the middle of the metal plate to form an inner plate, and repeat the bending process to form several inner plates;

[0009] S2: Fixing the positioning rod on the side panel, after the positioning rod passes through one of the inner panels, abutting the bent portion against the side panel;

[0010] S3: After turning one of the inner plates by n*90° (n is an odd number), the positioning rod is passed through the inner plate so that the bent portion abuts against the previous inner plate;

[0011] S4: Repeat S2 and S3 until a sufficient number of inner plates are placed on the positioning rod;

[0012] S5: passing the positioning rod through the other side panel so that the side panel abuts against the inner panel, and then fastening the side panel to the inner panel;

[0013] S6: Welding the abutting surfaces of each inner panel and the abutting surfaces between the inner panel and the side panel.

[0014] Preferably, at least two inner panels are provided.

[0015] Preferably, the inner plate includes a main body and a bent portion, the bent portion includes a first portion and a second portion, the first portion is perpendicular to the main body, and the second portion is perpendicular to the first portion and parallel to the main body.

[0016] Preferably, the bending portion further includes a third portion, the third portion is perpendicular to the main body, the third portion abuts against the first portion, and the third portion abuts against the second portion.

[0017] Preferably, the welding is pulse welding.

[0018] Preferably, the S1 further comprises punching a plurality of convex hulls on the inner plate for air distribution.

[0019] Preferably, the convex hulls are distributed in an array.

[0020] Preferably, gaskets are provided between adjacent inner plates.

[0021] Preferably, a plurality of the gaskets are provided, and the positioning rod passes through each of the plurality of gaskets.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a method for processing an air-to-air heat exchanger, which simplifies the processing of the air-to-air heat exchanger by using a single inner plate to form adjacent, different gas flow channels. This method not only improves the processing efficiency of the heat exchanger, but also enhances the heat exchange efficiency of the air-to-air heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A step diagram of a method for processing an inner panel according to an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of an inner plate provided in one embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of an inner plate provided in one embodiment of the present invention

[0027] Figure 4 A schematic diagram of the structure of two inner panels abutting against each other provided by one embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the structure of two inner panels abutting against each other provided by one embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the structure of three inner panels abutting against each other provided by one embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the structure of three inner panels abutting against each other provided by one embodiment of the present invention;

[0031] Figure 8 A schematic structural diagram of an air-to-air heat exchange device provided in one embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the installation of an air-to-air heat exchange device provided in one embodiment of the present invention.

[0033] Explanation of the main component symbols: 10-inner plate, 11-main body, 111-convex hull, 12-bending part, 121-first part, 122-second part, 123-third part, 20-side plate, 30-positioning rod, 40-nut, 50-gasket, 60-gas flow channel. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the present invention, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0036] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0037] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0038] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0039] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0040] Example

[0041] Heat exchangers are common heat exchange devices widely used in various fields. For example, patent application CN217483315 discloses an air-to-air heat exchange device. As disclosed in its specification, the heat exchange device in this application is constructed by welding a series of stacked metal sheets.

[0042] There are generally two ways to directly weld metal plates without bending them. One is to weld the heat exchange device into a rectangle through straight metal plates, and continue welding on the basis of the initial rectangle, so that the heat exchange device forms flow channels arranged at intervals.

[0043] The second method is to cut off one side of the rectangular tube to turn it into a groove-shaped plate, and then weld multiple rectangular tubes (groove-shaped plates) after cutting together to form a heat exchange device with flow channels arranged at intervals.

[0044] Since the structure of channel steel itself is too thick and heavy, it is not suitable as a raw material for processing heat exchange devices.

[0045] However, in actual production, if straight metal plates are directly welded, the welding workload will be extremely large. Or when purchasing a sufficient number of rectangular tubular materials for cutting, the amount of tubular material cut is also large.

[0046] Therefore, this application discloses a method for manufacturing an air-to-air heat exchanger. This method bends a thin metal sheet into an inner plate 10 similar to a channel steel structure. After positioning rods 30 are passed through a plurality of inner plates 10 arranged in a certain order, the inner plates 10 are clamped and secured by side plates 20. Once the side plates 20 and all inner plates 10 are relatively fixed, the gaps between the inner plates 10 and the gaps between the inner plates 10 and the side plates 20 are welded, thereby further facilitating the manufacture of the air-to-air heat exchanger.

[0047] Specifically, combined Figure 1 and Figure 9 The processing method of the gas-to-gas heat exchange device provided by the present invention includes:

[0048] S1: Take a rectangular thin metal plate, bend the edges of the opposite sides of the metal plate towards the middle of the metal plate to obtain the inner plate 10, and repeat the above bending to obtain several inner plates 10. The rectangular metal plate is a common sheet metal material with a relatively thin thickness, so that the heat exchange of the gas in adjacent air passages can be simpler. After bending the metal plate, a "U" - shaped metal plate, that is, the inner plate 10, is obtained.

[0049] S2: Fix the positioning rod 30 on the side plate 20. After the positioning rod 30 passes through one of the inner plates 10, abut the bent portion 12 against the side plate 20.

[0050] There are several fixing methods between the positioning rod 30 and the side plate 20, such as welding, threaded connection or other fixing methods. The main purpose is to make the position of the positioning rod 30 relatively fixed, so as to facilitate the positioning rod 30 to pass through the inner plate 10.

[0051] The side plate 20 is a metal plate arranged beside the inner plate 10. The side plate 20 can be a thick - wall metal plate or a thin - wall metal plate. Preferably, in an embodiment of the present invention, in order to reduce the overall weight of the gas - gas heat exchange device, the side plate 20 is selected as a thin - wall metal plate.

[0052] S3: After flipping one of the inner plates 10 by n * 90° (n is an odd number), pass the positioning rod 30 through this inner plate 10 so that the bent portion 12 abuts against the previous inner plate 10.

[0053] [ Based on the placement of the first "U" - shaped inner plate 10 in S2, taking the first "U" - shaped inner plate 10 as a reference. The first "U" - shaped inner plate 10 placed in S3 should rotate 90n degrees (n is an odd number) relative to the first "U" - shaped inner plate 10 in S2, that is, rotate 90 degrees, 270 degrees, 450 degrees, etc. Thus, the bent part of this inner plate 10 is perpendicular to the bent part of the inner plate 10 in S2.

[0054] In order to enable the positioning rod 30 to pass through the inner plate 10 smoothly, through - holes matching the positioning rod 30 are provided on the inner plate 10. The aperture of the through - hole is slightly larger than the rod diameter of the positioning rod 30, so that the positioning rod 30 can pass through smoothly.

[0055] S4: Repeat S2 and S3 until a sufficient number of inner plates 10 are arranged on the positioning rod 30. Of course, the placement of each inner plate 10 placed after each S2 is the same as that of the first inner plate 10.

[0056] The opening of the first "C"-shaped inner plate 10 placed in S2 can face the side plate 20 or be away from the side plate 20. It should be noted that the openings of all the "C"-shaped inner plates 10 placed in S3 face the same direction as the openings of the inner plates 10 in S2. Similarly, the openings of the inner plates 10 in the repeated S2 also face the same direction as the openings of the first inner plate 10.

[0057] S5: Pass the positioning rod 30 through another side plate 20 so that the side plate 20 abuts against the inner plate 10, and then fasten the side plate 20 to the inner plate 10.

[0058] Preferably, in an embodiment of the present invention, to facilitate adjusting the relative positions of the inner plates 10 between the side plates 20, the nut 40 is threadedly connected to the positioning rod 30, and then the side plate 20 is clamped between the nut 40 and the positioning rod 30, so that the positions of the positioning rod 30 and the side plate 20 can be relatively fixed. When the inner plates 10 clamped between the two side plates 20 are skewed or not well aligned, only need to loosen the nut 40, and then adjust the position of the inner plate 10. The change in the position of the inner plate 10 will drive the movement of the positioning rod 30. After the inner plate 10 is adjusted, the side plate 20 can be clamped to the inner plates 10 between the two side plates 20 by threadedly connecting the nut 40 to both ends of the positioning rod 30.

[0059] It should be noted that after the inner plates 10 are adjusted, the nut 40 needs to be tightened to the tightest.

[0060] Of course, the positioning rods 30 are distributed around the edge of the side plate 20. Multiple positioning rods 30 cooperate with the nuts 40 to lock the inner plates 10 together, so that the relative positions of the gas-gas heat exchange device are stable before welding, not easily shifted, and ensure good heat exchange effect of the gas-gas heat exchange device after welding.

[0061] Threads are usually provided at both ends of the positioning rod 30, and the rod diameter of the part without threads is larger than the rod diameter of the part with threads, so as to clamp the side plate 20.

[0062] S6: Weld the abutting surfaces of each inner plate 10 and the abutting surfaces of the inner plate 10 and the side plate 20.

[0063] Of course, the bending can not only bend the edge of the metal plate into a "C" shape perpendicular to the metal plate. As Figure 3 shown, when the inner plate 10 is bent only once, the inner plate 10 only has two first parts 121 perpendicular to the main body 11. When the first part 121 abuts against other inner plates 10 or the side plate 20, since the inner plate 10 is a thin plate, the abutment is not stable. In order to make the abutment between adjacent inner plates 10 more stable, usually, based on the bending in S1, bending is performed again.

[0064] Specifically, please refer to Figure 2-3 , Figure 3 The illustrated inner panel 10 includes a main body 11 and a bent portion 12, located at the top and bottom of the main body 11, respectively. The bent portion 12 includes a first portion 121 and a second portion 122. The first portion 121 is perpendicular to the main body 11, and the second portion 122 is an extension of the first portion 121. The second portion 122 is perpendicular to the first portion 121 and parallel to the second portion 122. The first portion 121 and the second portion 122 form an L-shaped bent portion 12. When the inner panels 10 abut against each other or against the side panel 20, the second portion 122 abuts against the inner panel 10 or the side panel 20, increasing the contact surface between the inner panels 10 and the side panel 20. This provides a more stable locking mechanism when the inner panel 10 and the side panel 20 are locked using the nut 40.

[0065] Furthermore, in one embodiment of the present invention, Figure 3 As shown, a third portion 123 is also provided. The third portion 123 is perpendicular to the main body 11 and abuts against the first portion 121 and the second portion 122. After the third portion 123 is provided, the four corners of the inner panel 10 are bent, which greatly improves the overall stability of the inner panel 10, allowing the inner panel 10 to maintain its shape under the influence of airflow.

[0066] Of course, the third part 123 is also an "L" shaped structure, combined with Figure 4 or Figure 6 When the inner panel 10 abuts against the inner panel 10 or the inner panel 10 abuts against the side panel 20, the edge of the inner panel 10 where the first portion 121 is not provided can also be supported, thereby enabling the inner panel 10 to be stable during airflow.

[0067] Once the inner panel 10 and side panel 20 are installed and the positioning rods 30 are tightened with nuts 40, the relative positions of the inner panel 10 and side panel 20 are stable and unlikely to change. Welding can now begin. When welding, be careful: if the edges of the inner panel 10 are misaligned, insert a beveled copper block to adjust the planes so that the edges of the inner panel 10 are aligned. Then, weld the abutting surfaces between the inner panels 10 and the abutting surfaces between the inner panel 10 and the side panel 20 to avoid weld-through.

[0068] At the same time, the power of thin plate welding cannot be too large, otherwise welding will occur. Pulse welding should be used for thin plates to ensure the welding effect of thin plates.

[0069] Preferably, in order to ensure that the airflow is evenly distributed when passing through the gas flow channel 60 enclosed by the inner plate 10, thereby achieving a better heat exchange effect between gases, S1 also includes stamping the inner plate 10 to form a convex bump 111 on the inner plate 10.

[0070] like Figure 2-7 As shown, the inner plate 10 is provided with a plurality of convex bumps 111 distributed in an array. Figure 5 and Figure 7 When the inner plates 10 abut against each other, that is, when the bent portion 12 abuts against the main body 11 , the convex bump 111 abuts against the main body 11 .

[0071] It should be noted that the positions of the bumps 111 of two adjacent inner panels 10 do not overlap, so that all the bumps 111 are in contact with the main body 11, so that the bumps 111 can support the main body 11, making the main body 11 stable under the blowing of airflow.

[0072] When the airflow Figure 5 As shown, when the gas passes through the gas flow channel 60 enclosed by the two inner plates 10, the gas is evenly dispersed into various parts of the gas flow channel 60 under the cutting of the convex hull 111. Figure 7 When the cold and hot air flows pass through the two adjacent gas flow channels 60 enclosed by the inner plate 10 at the same time, the cold and hot air flows are respectively cut off by the convex hulls 111 in their respective gas flow channels 60 and then dispersed to various areas of the gas flow channels 60, thereby enabling sufficient heat exchange between the cold and hot fluids.

[0073] Of course, the convex hump 111 also has the effect of slowing down the gas flow rate. When the gas flow rate is reduced, the time the gas stays in the gas flow channel 60 is prolonged. At this time, there is sufficient time for heat exchange between the cold and hot air flows, thereby making the heat exchange more sufficient.

[0074] Furthermore, the boundary of the convex hull 111 is a curved surface structure, and the airflow is dispersed under the guidance of the curved surface without forming turbulence.

[0075] Furthermore, in order to prevent the inner plate 10 from being crushed when the nut 40 is tightened, a gasket 50 is placed after each inner plate 10 is placed, so that the gasket 50 is located between the two inner plates 10 and is clamped by the inner plate 10. The gasket 50 is a solid structure. When the nut 40 is tightened, the gasket 50 is clamped, and the structure of the gasket 50 is stable and will not be squeezed and deformed, thereby making the distance between the inner plates 10 stable, thereby ensuring that the gas flow channel 60 can be used normally.

[0076] Combine Figure 3 、 Figure 5 and Figure 7, the positioning rod 30 passes through the inner plate 10 beside the bent portion 12. In order to prevent the gasket 50 from falling during use, the gasket 50 is usually arranged at the positioning rod 30, and the gasket 50 is also passed by the positioning rod 30.

[0077] Of course, there are also multiple gaskets 50. Multiple gaskets 50 ensure that the inner plate 10 is subjected to uniform force when squeezed, and the gaskets 50 are arranged close to the bending part, thereby preventing the gaskets 50 from affecting the uniform wind distribution of the convex hump 111.

[0078] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A method for processing an air-to-air heat exchange device, characterized in that: include: S1: Take a rectangular thin metal plate, bend the edges of the metal plate on two opposite sides toward the middle of the metal plate to form an inner plate, and repeat the bending process to form several inner plates; S2: Fixing the positioning rod on the side panel, after the positioning rod passes through one of the inner panels, abutting the bent portion against the side panel; S3: After turning one of the inner plates by n*90° (n is an odd number), the positioning rod is passed through the inner plate so that the bent portion abuts against the previous inner plate; S4: Repeat S2 and S3 until a sufficient number of inner plates are placed on the positioning rod; S5: passing the positioning rod through the other side panel so that the side panel abuts against the inner panel, and then fastening the side panel to the inner panel; S6: Welding the abutting surfaces of each inner panel and the abutting surfaces of the inner panel and the side panel; The inner plate includes a main body and a bent portion, the bent portion includes a first portion and a second portion, the first portion is perpendicular to the main body, and the second portion is perpendicular to the first portion and parallel to the main body; The bending portion further includes a third portion, the third portion is perpendicular to the main body, the third portion abuts against the first portion, and the third portion abuts against the second portion; Gaskets are provided between adjacent inner plates; A plurality of the gaskets are provided, and the positioning rod passes through each of the gaskets.

2. The method for processing an air-to-air heat exchange device according to claim 1, characterized in that: At least two inner panels are provided.

3. The processing method of the gas-to-gas heat exchange device according to claim 1, characterized in that: The welding is pulse welding.

4. The method for processing an air-to-air heat exchange device according to claim 1, characterized in that: The S1 further includes punching a plurality of convex hulls on the inner plate for air distribution.

5. The method for processing an air-to-air heat exchange device according to claim 4, characterized in that: The convex hull array is distributed.

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