A heat exchanger water cooling plate welding apparatus and method

Abstract

The application discloses a heat exchanger water-cooled plate welding device and method, which comprises an upper pressing plate for pressing a flow channel plate and a lower pressing plate for supporting a flow channel bottom plate. A plurality of guide rods are arranged through the upper pressing plate, and a filler liquid collecting tank is connected to the bottom of the guide rods. The top of the guide rods is connected with a vertical driving member. The bottom of the filler liquid collecting tank is provided with a plurality of discharge insertion tubes communicating with the filler liquid collecting tank. The bottom of the position where the flow channel plate contacts with the flow channel bottom plate is provided with an upper groove. The upper side of the flow channel bottom plate is provided with a lower groove corresponding to the upper groove. The top of the upper groove is provided with a plurality of liquid injection insertion holes corresponding to the discharge insertion tubes. The heat exchanger water-cooled plate welding device can assist in welding the flow channel plate and the flow channel bottom plate, improve the welding quality, and avoid liquid leakage between the flow channels.

Description

Technical Field

[0001] This invention relates to water-cooled plates, and more specifically, to a welding device and method for water-cooled plates in heat exchangers. Background Technology

[0002] Water-cooled plates are widely used in rechargeable new energy vehicles. Their purpose is to adjust the operating temperature of the battery pack according to the ambient temperature. When the ambient temperature is too low, the battery pack environment is heated, and when the ambient temperature is too high, the battery pack environment is cooled to maintain the normal operation of the battery pack.

[0003] A stamped water-cooled plate is available, comprising a flow channel plate and a support base plate. The support base plate is flat, and a convex shell is stamped on the upper side of the flow channel plate. The shell and the support base plate form a closed flow channel. The contact position between the support base plate and the flow channel plate needs to be sealed by welding to prevent liquid cross-contamination.

[0004] The existing welding method produces a "I"-shaped weld, which means that there is a gap of a certain thickness between the support base plate and the flow channel plate. The gap is filled with brazing filler metal and heated to complete the welding. This type of weld often results in leakage due to incomplete welding and liquid seepage. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device and method for water-cooled plates in heat exchangers. This welding device can assist in welding the flow channel plate and the flow channel bottom plate, improve the welding quality, and prevent liquid cross-contamination between flow channels.

[0006] To achieve the above objectives, the present invention provides a welding device for a water-cooled heat exchanger plate. This device includes an upper pressure plate for pressing a flow channel plate and a lower pressure plate for supporting a flow channel bottom plate. Multiple guide rods are disposed through the upper pressure plate. A brazing filler fluid collector is connected to the bottom of each guide rod, and the top of each guide rod is connected to a vertical drive component. Multiple discharge pipes communicating with the brazing filler fluid collector are disposed at the bottom of the brazing filler plate. An upper groove is provided at the bottom of the position where the flow channel plate contacts the flow channel bottom plate. A lower groove corresponding to the upper groove is provided on the upper side of the flow channel bottom plate. Multiple injection holes corresponding to the discharge pipes are provided at the top of the upper groove.

[0007] Preferably, the plurality of feeding tubes are arranged in a matrix evenly distributed on the bottom surface of the brazing filler metal tank.

[0008] Preferably, the driving component includes a linkage plate integrally connected to the plurality of guide rods and a driving cylinder connected to the linkage plate.

[0009] Preferably, the upper side of the upper pressure plate is connected to a hydraulic cylinder, and the lower side is provided with a plurality of pressing uprights for supporting the protruding position of the flow channel plate.

[0010] Preferably, the heat exchanger water-cooled plate welding equipment is detachably mounted on the shaking device and can be transferred as a whole to the heating furnace.

[0011] The present invention also provides a welding method for a heat exchanger water-cooled plate, which uses the aforementioned heat exchanger water-cooled plate welding equipment and includes the following steps:

[0012] S1, stamping out the upper groove, lower groove and liquid injection hole;

[0013] S2, the flow channel plate is aligned and pressed with the flow channel bottom plate by the upper and lower pressure plates;

[0014] S3, injecting brazing fluid between the upper and lower grooves through the brazing fluid header;

[0015] S4. After the brazing filler fluid has been evenly filled and cooled, heat the whole thing in a hot atmosphere.

[0016] S5, cool and solidify, welding complete.

[0017] Preferably, between steps S1 and S2, a support frame is placed between the upper and lower grooves; the support frame includes side welding plates disposed on both sides and conforming to the side walls of the upper and lower grooves, heat insulation plates disposed on the inner side of the side welding plates, and support strips arranged and fixed between two adjacent heat insulation plates, and the liquid injection hole is disposed between two adjacent heat insulation plates; the melting points of the side welding plates, heat insulation plates, support strips, solder, flow channel plate and flow channel bottom plate are A, B, C, D, E and F respectively, wherein the relationship between the melting points is: A < D < B = C < E = F.

[0018] Preferably, the side welding plate is also disposed in the middle position between the upper groove and the lower groove, and heat insulation plates are disposed on both sides of the side welding plate located in the middle position.

[0019] Preferably, the heat insulation plate and the side welding plate are at the same height, and the height of the heat insulation plate and the side welding plate is 0.1-0.2 mm greater than the distance between the upper groove and the lower groove.

[0020] Preferably, the brazing filler fluid contains 5%-10% foaming liquid.

[0021] According to the above technical solution, the heat exchanger water-cooled plate welding equipment of the present invention can assist in welding the flow channel plate and the flow channel bottom plate, improve the welding quality, and avoid liquid cross-contamination between the flow channels.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a partial structural diagram of a preferred embodiment of a heat exchanger water-cooled plate welding equipment;

[0025] Figure 2 yes Figure 1 A partial structural diagram after the flow channel plate has been removed.

[0026] Explanation of reference numerals in the attached figures

[0027] 1-Lower pressure plate; 2-Upper pressure plate; 3-Flow channel bottom plate; 4-Flow channel plate; 5-Pressing upright plate; 6-Guide rod; 7-Brewing fluid collector; 8-Discharge tube; 9-Upper groove; 10-Lower groove; 11-Side welding plate; 12-Injection hole; 13-Heat insulation plate; 14-Support bar. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0030] See Figure 1-2 The heat exchanger water-cooled plate welding equipment shown includes an upper pressure plate 2 for pressing the flow channel plate 4 and a lower pressure plate 1 for supporting the flow channel bottom plate 3. Multiple guide rods 6 are provided through the upper pressure plate 2. A brazing filler fluid collector 7 is connected to the bottom of each guide rod 6, and the top of each guide rod 6 is connected to a vertical drive component. Multiple discharge pipes 8 communicating with the brazing filler fluid collector 7 are provided at the bottom of the flow channel plate 4 where it contacts the flow channel bottom plate 3. A lower groove 9 is provided on the upper side of the flow channel bottom plate 3, corresponding to the upper groove 9. Multiple injection holes 12, corresponding one-to-one with the discharge pipes 8, are provided on the top of the upper groove 9.

[0031] By implementing the above technical solution, the heat exchanger water-cooled plate welding equipment can assist in welding the flow channel plate 4 and the flow channel bottom plate 3, improving welding quality and preventing liquid cross-contamination between flow channels. Specifically, the brazing filler fluid is pumped from the brazing filler fluid collector 7 into the space between the upper groove 9 and the lower groove 10, thereby forming a symmetrical T-shaped weld structure, increasing the welding surface and reducing the possibility of incomplete welding.

[0032] In this embodiment, multiple feeding tubes 8 are arranged in a matrix evenly on the bottom surface of the brazing filler metal collector 7. This arrangement increases the uniformity of brazing filler metal distribution, further increases the integrity of the weld, and avoids incomplete welds.

[0033] In this embodiment, to further provide a driving component, the driving component includes a linkage plate integrally connected to the plurality of guide rods 6 and a driving cylinder connected to the linkage plate. The driving cylinder drives the linkage plate seat to move vertically, thereby driving the solder fluid collector 7 to move vertically under the action of the guide rods 6. The solder fluid collector 7 can be a segmented structure or an integral structure, which can be set as needed.

[0034] In this embodiment, a hydraulic cylinder is connected to the upper side of the upper pressure plate 2, and a plurality of pressing uprights 5 are provided on the lower side for supporting the protruding positions of the flow channel plate 4. The pressing uprights 5 are provided to avoid affecting the injection port 12 when pressing the flow channel plate 4.

[0035] In addition, all injection holes 12 should be sealed by welding after welding is completed to prevent leakage at the injection hole 12 position.

[0036] In this embodiment, the heat exchanger water-cooled plate welding equipment is detachably mounted on the shaking device and can be transferred as a whole to the heating furnace. The shaking device can increase the uniformity of the brazing filler metal distribution, and the heating furnace heats the brazing filler metal to the required temperature to melt it, thereby filling the gaps between the upper groove 9, the lower groove 10, and the bottom plate 3 and the flow channel plate 4.

[0037] The present invention also provides a welding method for a heat exchanger water-cooled plate, which uses the aforementioned heat exchanger water-cooled plate welding equipment and includes the following steps:

[0038] S1, stamp out the upper groove 9, the lower groove 10 and the liquid injection hole 12;

[0039] S2, the flow channel plate 4 and the flow channel bottom plate 3 are aligned and pressed together by the upper pressure plate 2 and the lower pressure plate 1;

[0040] S3, filler fluid is injected between the upper groove 9 and the lower groove 10 through the brazing fluid collector 7;

[0041] S4. After the brazing filler fluid has been evenly filled and cooled, heat the whole thing in a hot atmosphere.

[0042] S5, cool and solidify, welding complete.

[0043] In this embodiment, between steps S1 and S2, a support frame is placed between the upper groove 9 and the lower groove 10. The support frame includes side welding plates 11 disposed on both sides and attached to the side walls of the upper groove 9 and the lower groove 10, heat insulation plates 13 disposed on the inner side of the side welding plates 11, and support strips 14 arranged and fixed between two adjacent heat insulation plates 13. The liquid injection hole 12 is disposed between two adjacent heat insulation plates 13. The melting points of the side welding plates 11, heat insulation plates 13, support strips 14, solder, flow channel plate 4, and flow channel bottom plate 3 are A, B, C, D, E, and F, respectively, wherein the relationship between the melting points is: A < D < B = C < E = F. When welding in this way, the heating temperature in the hot atmosphere should be adjusted to be lower than the melting point of the brazing filler metal but higher than the melting point of the side welding plate 11, so that the solidified brazing filler metal does not melt and acts as a support for the heat insulation plates 13 on both sides and the side welding plate 11. The side welding plate 11 melts at the heating temperature, realizing the gap welding between the side welding plate 11 and the side wall of the upper groove 9, the side wall of the lower groove 10, the heat insulation plate 13, and the flow channel bottom plate 3 and the flow channel plate 4. Some welds have T-shaped ends and a supporting structure in the middle.

[0044] In this embodiment, the side welding plate 11 is also disposed in the middle position between the upper groove 9 and the lower groove 10, and heat insulation plates 13 are disposed on both sides of the side welding plate 11 located in the middle position. With this arrangement, the heat insulation plates 13 form an isolation function, and if there is a leak in the side welding plates 11 on both sides, the middle side welding plate 11 can block the liquid from flowing through, further preventing liquid from flowing through.

[0045] In this embodiment, in order to facilitate the formation of an effective welding gap between the heat insulation plate 13 and the side welding plate 11, the heat insulation plate 13 and the side welding plate 11 are of the same height, and the height of the heat insulation plate 13 and the side welding plate 11 is greater than the distance between the upper groove 9 and the lower groove 10 by 0.1-0.2 mm.

[0046] In this embodiment, the brazing flux contains 5%-10% foaming liquid. By adding foaming liquid to the brazing flux, a foaming effect is formed after the brazing flux enters between the upper groove 9 and the lower groove 10, which increases the support effect on the heat insulation plate 13, thereby improving the stability of the side welding plate 11 during brazing and hot melting.

[0047] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A welding joint for a water-cooled plate in a heat exchanger, characterized in that, It includes a flow channel plate (4) and a flow channel bottom plate (3). The flow channel plate (4) has an upper groove (9) at the bottom of the contact position with the flow channel bottom plate (3). The flow channel bottom plate (3) has a lower groove (10) corresponding to the upper groove (9) on its upper side. The upper groove (9) has a plurality of injection holes (12) for injecting brazing flux at its top. It also includes a support frame placed between the upper groove (9) and the lower groove (10); The support frame includes side welding plates (11) that are attached to the side walls of the upper groove (9) and the lower groove (10) on both sides, heat insulation plates (13) that are disposed inside the side welding plates (11), and support strips (14) that are arranged and fixed between two adjacent heat insulation plates (13). The liquid injection hole (12) is disposed between two adjacent heat insulation plates (13). The melting points of the side welding plate (11), heat insulation plate (13), support strip (14), brazing flux, flow channel plate (4) and flow channel bottom plate (3) are A, B, C, D, E and F respectively, and the relationship between the melting points is: A < D < B = C < E = F.

2. A welding device for a heat exchanger water-cooled plate, used for welding the welded joint of the heat exchanger water-cooled plate as described in claim 1, characterized in that, The heat exchanger water-cooled plate welding equipment includes an upper pressure plate (2) for pressing the flow channel plate (4) and a lower pressure plate (1) for supporting the flow channel bottom plate (3). Multiple guide rods (6) are provided through the upper pressure plate (2). The bottom of the guide rods (6) is connected to a brazing flux collection tank (7). The top of the guide rods (6) is connected to a vertical drive component. Multiple feeding tubes (8) communicating with the brazing flux collection tank (7) are provided at the bottom. An upper groove (9) is provided at the bottom of the position where the flow channel plate (4) contacts the flow channel bottom plate (3). A lower groove (10) corresponding to the upper groove (9) is provided on the upper side of the flow channel bottom plate (3). Multiple injection holes (12) corresponding to the feeding tubes (8) are provided on the top of the upper groove (9).

3. The heat exchanger water-cooled plate welding equipment according to claim 2, characterized in that, Multiple feeding tubes (8) are arranged in a matrix on the bottom surface of the brazing filler metal collector (7).

4. The heat exchanger water-cooled plate welding equipment according to claim 2, characterized in that, The driving component includes a linkage plate integrally connected to the plurality of guide rods (6) and a driving cylinder connected to the linkage plate.

5. The heat exchanger water-cooled plate welding equipment according to claim 2, characterized in that, The upper side of the upper pressure plate (2) is connected to a hydraulic cylinder, and the lower side is provided with multiple pressing plates (5) for supporting the protruding position of the flow channel plate (4).

6. The heat exchanger water-cooled plate welding equipment according to any one of claims 2-5, characterized in that, The heat exchanger water-cooled plate welding equipment can be detachably installed on the shaking device and can be transferred as a whole to the heating furnace.

7. A method for welding water-cooled plates for heat exchangers, characterized in that, The heat exchanger water-cooled plate welding method uses the heat exchanger water-cooled plate welding equipment according to any one of claims 2-6, and includes the following steps: S1, stamp out the upper groove (9), the lower groove (10) and the liquid injection hole (12), and place the support frame between the upper groove (9) and the lower groove (10); S2, the flow channel plate (4) and the flow channel bottom plate (3) are aligned and pressed together by the upper pressure plate (2) and the lower pressure plate (1); S3, fill the brazing filler fluid between the upper groove (9) and the lower groove (10) through the brazing filler fluid collector (7); S4. After the brazing filler fluid has been evenly filled and cooled, heat the whole thing in a hot atmosphere. S5, cool and solidify, welding complete.

8. The welding method for water-cooled plates of heat exchangers according to claim 7, characterized in that, The side welding plate (11) is also located in the middle of the upper groove (9) and the lower groove (10), and heat insulation plates (13) are provided on both sides of the side welding plate (11) located in the middle.

9. The welding method for water-cooled plates in heat exchangers according to claim 7, characterized in that, The heat insulation plate (13) and the side welding plate (11) have the same height, and the height of the heat insulation plate (13) and the side welding plate (11) is greater than the distance between the upper groove (9) and the lower groove (10) by 0.1-0.2 mm.

10. The welding method for water-cooled plates of heat exchangers according to claim 7, characterized in that, The brazing filler fluid contains 5%-10% foaming liquid.

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