Soldering flux spraying system

Abstract

The utility model relates to a soldering flux spraying system which is used for spraying soldering flux to an object to be welded. The soldering flux spraying system comprises a soldering flux storage tank, a soldering flux nozzle, a spraying pump and a soldering flux recovery tank; the spraying pump is connected with the soldering flux storage tank and the soldering flux spraying head through a spraying pipeline so as to be used for pumping soldering flux in the soldering flux storage tank and conveying the soldering flux to the soldering flux spraying head. The soldering flux recovery tank is arranged below the soldering flux spray head and is communicated with the soldering flux storage tank so as to be used for receiving dripping soldering flux and enabling the soldering flux to flow back to the soldering flux storage tank; the soldering flux spraying system further comprises a flushing sub-path, and the flushing sub-path is connected with the soldering flux storage tank and the soldering flux recovery tank so that soldering flux in the soldering flux storage tank can be obtained to flush the soldering flux recovery tank. According to the soldering flux spraying system, the problems of soldering flux waste, concentration change and inconvenient system cleaning caused by precipitation of the soldering flux in the recovery process can be solved.

Description

Technical Field

[0001] This application relates to the field of flux spraying technology, and in particular to a flux spraying system applied in the welding production process of heat exchangers. Background Technology

[0002] Heat exchangers are frequently used in the operation of equipment such as automobiles, construction machinery, and air conditioners. Heat exchangers, including components such as water tanks, condensers, and evaporators, are mostly made of aluminum alloys and welded together using a brazing process. The brazing process typically requires applying flux to the products to be brazed before brazing. Flux, also known as solder flux, removes oxide films and protects the weld area during brazing, thus assisting in the process and improving brazing quality. Common fluxes include KAlF4 (potassium fluoroaluminate).

[0003] Potassium fluoroaluminate flux is typically a flux solution formed by mixing potassium fluoroaluminate powder particles with water, with a solution concentration of approximately 5-15%. Because the density of potassium fluoroaluminate solute in the flux solution is greater than that of water, it will precipitate in the water after prolonged stagnation, and may even clump together over time. If precipitation occurs, it will cause changes in the flux solution concentration, resulting in variations in the amount of flux adhered to the product after application, thus affecting the brazing performance. Therefore, the flux solution needs to be constantly stirred during use to ensure uniform mixing.

[0004] During use, the well-mixed flux is sprayed onto the product to be soldered. Excess flux solution drips from the product during this process. To reduce waste and save costs, a recovery tray is typically used to collect the excess flux solution. The excess flux dripping from the product flows under gravity into the recovery tray below the product, and then flows back to the flux container. However, in practical applications, it has been found that the solute in the flux solution tends to precipitate in the recovery tray, resulting in only water flowing back into the flux container. This means the precipitated flux cannot be recycled, causing waste, affecting the flux concentration in the container, and making cleaning the recovery tray inconvenient.

[0005] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0006] Based on this, this application provides a flux spraying system to prevent flux waste, concentration changes, and inconvenient system cleaning caused by flux precipitation during the recycling process.

[0007] Therefore, this application adopts the following technical solution: a flux spraying system for spraying flux onto the workpiece to be welded, wherein:

[0008] The flux spraying system includes a flux storage tank, flux nozzles, a spray pump, and a flux recovery tank;

[0009] The spray pump is connected to the flux storage tank and the flux nozzle through a spray pipeline, so as to draw flux from the flux storage tank and deliver it to the flux nozzle;

[0010] The flux recovery tank is located below the flux nozzle and is connected to the flux storage tank to collect the dripping flux and return it to the flux storage tank.

[0011] The flux spraying system further includes a rinsing sub-path, which connects the flux storage tank and the flux recovery tank to use flux from the flux storage tank to rinse the flux recovery tank.

[0012] In some embodiments, the flushing sub-path includes a flushing pipeline and a flushing pump connected to the flushing pipeline. The flushing pump is used to draw flux from the flux storage tank and spray it into the flux recovery tank through the flushing pipeline.

[0013] In some embodiments, the rinsing sub-circuit includes a rinsing line connected to the spray pump to flush the flux recovery tank by drawing flux from the flux storage tank using the spray pump.

[0014] In some embodiments, the flushing sub-path includes a spray pipe disposed within the flux recovery tank, with a gap between the spray pipe and the bottom of the flux recovery tank, and a return port disposed at the bottom of the flux recovery tank opposite to the bottom of the tank; wherein: both ends of the spray pipe are fixedly connected to the opposite side walls of the flux recovery tank, and the spray pipe includes a plurality of spray holes facing the bottom of the flux recovery tank;

[0015] Alternatively, one end of the spray pipe is fixedly connected to the side wall of the flux recovery tank, and the other end is suspended in the flux recovery tank, wherein the suspended end of the spray pipe is open or closed, and / or the spray pipe includes a plurality of spray holes facing the bottom of the flux recovery tank.

[0016] In some embodiments, the inner bottom surface of the flux recovery tank is inclined downward from the end where the spray pipe is located to the end where the return port is located.

[0017] In some embodiments, both ends of the injection tube are inlets to deliver flux from both ends into the injection tube.

[0018] In some embodiments, the flux spraying system includes a return pipeline with its two ends connected to the flux recovery tank and the flux storage tank, respectively, and the return port is connected to the flux storage tank through the return pipeline.

[0019] In some embodiments, the flux storage tank is equipped with a stirring device.

[0020] In some embodiments, the flux spraying system includes a support platform for carrying the workpiece to be soldered, the support platform being located vertically between the flux nozzle and the flux recovery tank.

[0021] In some embodiments, the support platform includes a conveyor belt for moving the object to be welded past the flux nozzle.

[0022] The flux spraying system provided in this application includes a flux storage tank, flux nozzles, a spray pump, and a flux recovery tank, and further includes a rinsing sub-path connected to the flux storage tank and the flux recovery tank, so as to use flux in the flux storage tank to rinse the flux recovery tank. By setting it up in this way, flux precipitation in the flux recovery tank is avoided, reducing flux waste. At the same time, the solution concentration in the flux storage tank is kept stable, and the need for regular manual cleaning of the tray is eliminated, reducing cleaning costs and making it more environmentally friendly. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a connection diagram of an embodiment of the flux spraying system of this application.

[0025] Figure 2 This is a connection diagram of another embodiment of the flux spraying system of this application.

[0026] Figure 3 This is a schematic diagram of a flux recovery tank in one embodiment of the flux spraying system of this application.

[0027] The component labels are as follows:

[0028] 1. Flux storage tank; 2. Spray pump; 3. Flux nozzle; 4. Conveyor belt; 5. Flux recovery tank; 51. Return port; 6. Flushing pump; 7. Spray pipeline; 8. Flushing pipeline; 81. Spray pipe; 9. Return pipeline; 10. Object to be welded. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figures 1 to 3As shown, this application provides a flux spraying system for spraying flux onto a workpiece 10 to be soldered. The flux spraying system includes a flux storage tank 1, a flux nozzle 3, a spray pump 2, and a flux recovery tank 5. The spray pump 2 is connected to the flux storage tank 1 and the flux nozzle 3 via a spray pipeline 7, for drawing flux from the flux storage tank 1 and delivering it to the flux nozzle 3. The flux recovery tank 5 is located below the flux nozzle 3 and communicates with the flux storage tank 1, for receiving dripping flux and returning it to the flux storage tank 1. The flux spraying system also includes a rinsing sub-path connected to the flux storage tank 1 and the flux recovery tank 5, for rinsing the flux recovery tank 5 with flux from the flux storage tank 1.

[0035] The flux spraying system provided in this application includes a flux storage tank 1, a flux nozzle 3, a spray pump 2, a flux recovery tank 5, and a rinsing sub-circuit. The rinsing sub-circuit connects the flux storage tank 1 and the flux recovery tank 5 to use the flux in the flux storage tank 1 to rinse the flux recovery tank 5. This configuration avoids flux sedimentation in the flux recovery tank 5, reducing flux waste. At the same time, it ensures a stable solution concentration in the flux storage tank 1 and avoids the need for regular manual cleaning of the flux recovery tank 5, thus reducing cleaning costs and being more environmentally friendly.

[0036] Please see Figure 1 As shown, the flux storage tank 1 is a container used to store the flux solution. Specifically, it can be barrel-shaped, box-shaped, etc., and this application does not limit its specific shape. In one embodiment, the flux solution is a mixture of potassium fluoroaluminate powder and water, with a concentration of approximately 5-15%. Therefore, the flux storage tank 1 is equipped with a stirring device to continuously stir and prevent flux sedimentation, ensuring a uniform concentration of the flux solution and avoiding changes in the amount of flux adhering to the product after flux spraying due to flux sedimentation, thereby affecting the brazing effect.

[0037] The spray pump 2 is connected to the flux storage tank 1 and the flux nozzle 3 via a spray pipe 7. It draws flux solution from the flux storage tank 1 and delivers it to the flux nozzle 3, allowing the flux solution to be sprayed onto the workpiece 10 to be welded. The flux nozzle 3 is positioned above the workpiece 10. In practical applications, the flux nozzle 3 and the workpiece 10 can be positioned at a suitable distance and angle to ensure spray quality. In one specific embodiment, the spray pump 2 can be a diaphragm pump. In another specific embodiment, the flux nozzle 3 is the nozzle of a spray gun, which can be mounted and fixed above the workpiece 10 using a mounting bracket or other components.

[0038] like Figure 1 and Figure 2As shown, in some embodiments, the flux spraying system includes a support platform for carrying the workpiece 10 to be soldered, the support platform being located vertically between the flux nozzle 3 and the flux recovery tank 5. The support platform includes a conveyor belt 4 for moving the workpiece 10 to be soldered past the flux nozzle 3. The arrangement of the support platform and the conveyor belt 4 enables automatic transport of the workpiece 10 to be soldered, reducing manual operation and lowering labor costs; at the same time, this automated transport method also ensures a more precise relative position between the workpiece 10 to be soldered and the flux nozzle 3, thereby ensuring the quality of flux spraying.

[0039] Please see Figure 1 and Figure 3 As shown, the flux recovery tank 5 is located below the flux nozzle 3 and is connected to the flux storage tank 1. During the spraying process, excess flux solution drips from the workpiece 10 to be soldered into the flux recovery tank 5 under gravity, and then flows back into the flux storage tank 1. In this embodiment, the flux recovery tank 5 is a roughly rectangular tray-shaped vessel with its inner bottom surface inclined from one end to the other. A return port 51 is provided at the lower inclined end, and the return port 51 is connected to the flux storage tank 1 through a return pipe 9. In this embodiment, the above-described structure of the flux recovery tank 5 facilitates the flow of flux solution within it to the return port 51 and from the return port 51 to the flux storage tank 1. Of course, in other embodiments, the flux recovery tank 5 can also be configured in other shapes, such as a funnel shape or other shapes that facilitate liquid flow.

[0040] The inclined or funnel-shaped design of the flux recovery tank 5 is beneficial to the flow of liquid to some extent. However, due to the limited distance between the flux spraying equipment and the ground, the inclination angle is usually not very large, for example, it can only be set to an inclination angle of about 10 to 20 degrees with the horizontal plane. At the same time, due to the large area of ​​the flux recovery tank 5 and the slow flow rate of the flux solution in the flux recovery tank 5, the flux is still easy to precipitate from the mixed solution. To this end, the flux spraying system provided by this utility model is further provided with a rinsing sub-path.

[0041] like Figure 1The diagram illustrates one embodiment of a flux spraying system. This embodiment employs a separate flushing pump 6. Specifically, the flushing subsystem includes a flushing pipe 8 and a flushing pump 6 connected to the flushing pipe 8. The flushing pump 6 is used to extract flux from the flux storage tank 1 and spray it into the flux recovery tank 5 through the flushing pipe 8. In the specific implementation process, one end of the flushing pipe 8 is connected to the side wall of the flux storage tank 1 near the bottom to ensure that a flux solution of uniform concentration can be extracted; the other end extends into the flux recovery tank 5, and a spray pipe 81 is provided in the flux recovery tank 5; the spray pipe 81 is arranged at one end of the flux recovery tank 5, and its function is to allow the flux solution to be sprayed evenly into the flux recovery tank 5 to flush the flux recovered in the flux recovery tank 5 and prevent the flux from settling in the flux recovery tank 5; the return port 51 provided at the other end of the flux recovery tank 5 is connected to the flux storage tank 1 through the return pipe 9, so that the flux solution after flushing can flow back to the flux storage tank 1 through the return port 51 and the return pipe 9.

[0042] Please refer to the following: Figure 3 As shown, in this embodiment, the inner bottom surface of the flux recovery tank 5 is inclined from one end to the other, and the spray pipe 81 is arranged at the higher end of the flux recovery tank 5. That is, the inner bottom surface of the flux recovery tank 5 is inclined downward from the end where the spray pipe 81 is located to the end where the return port 51 is located, so that the spray pipe 81 sprays and flushes from top to bottom along the inclined surface, improving the rinsing effect. In this embodiment, there is a gap between the spray pipe 81 and the bottom of the flux recovery tank 5, and the return port 51 is provided at the bottom of the flux recovery tank 5 opposite to the spray pipe 81. The two ends of the spray pipe 81 are respectively fixedly connected to the two opposite side walls of the flux recovery tank 5, and the spray pipe 81 includes a plurality of spray holes facing the bottom of the flux recovery tank. In this embodiment, both ends of the spray pipe 81 are liquid inlets to deliver flux from both ends into the spray pipe 81, ensuring good flushing uniformity and flushing force, and guaranteeing effective flushing of the entire bottom surface of the flux recovery tank 5. In this embodiment, the spray pipe 81 is made of stainless steel or plastic, with an inner diameter greater than 16mm. It has an outlet hole of approximately 5mm in diameter every approximately 80mm, with the outlet facing the direction requiring flushing.

[0043] In another embodiment, the spray pipe 81 can also be arranged with one end fixed and the other end suspended. Specifically, one end of the spray pipe 81 is fixedly connected to the side wall of the flux recovery tank 5, and the other end is suspended in the flux recovery tank 5. The suspended end of the spray pipe 81 can be open to serve as a water rinsing outlet, or it can be closed to allow water to be sprayed through additional spray holes for rinsing. In this embodiment, the spray pipe 81 can be provided with multiple spray holes facing the bottom of the flux recovery tank 5.

[0044] like Figure 2 The diagram illustrates another embodiment of the flux spraying system. This embodiment utilizes a spray pump 2 for rinsing. In this embodiment, the rinsing sub-circuit includes a rinsing pipe 8 connected to the spray pump 2, which draws flux from the flux storage tank 1 to rinse the flux recovery tank 5. Specifically, the rinsing pipe 8 is connected to the spray pipe 7 and can be equipped with corresponding valves for control. When both spraying and rinsing operations are required, the valves on both the rinsing pipe 8 and the spray pipe 7 are opened. A portion of the flux solution drawn by the spray pump 2 is transported through the spray pipe 7 to the flux nozzle 3, while the other portion is transported through the rinsing pipe 8 to the spray pipe 81 within the flux recovery tank 5 to rinse the flux recovery tank 5, thus achieving simultaneous spraying and rinsing operations. In other embodiments, depending on the requirements, only spraying or only rinsing operations can be performed, which can be achieved by controlling the opening and closing of the corresponding valves.

[0045] Figure 2 The embodiment shown uses a spray pump 2 for rinsing, which eliminates the need for an additional rinsing pump 6. This method has the advantages of simple structure and low cost. However, during rinsing, it may affect the flow rate and pressure of the spraying operation. Therefore, it is necessary to reasonably adjust the operating parameters of the spray pump 2 according to the actual situation to ensure that both spraying and rinsing achieve good results.

[0046] Figure 2 Other components in the illustrated embodiment and Figure 1 The settings in the illustrated embodiments are the same and can be referred to. Figure 1 The illustrated embodiments are understood and will not be described in detail here.

[0047] The following reference Figure 1 The illustrated embodiment demonstrates the usage process of the flux spraying system provided in this application:

[0048] 1) Spray pump 2 draws a mixture of flux and water from flux storage tank 1 and delivers it to flux nozzle 3 through spray pipeline 7;

[0049] 2) The object to be welded 10 is conveyed horizontally forward on the conveyor belt 4. The flux mixture is sprayed from the flux nozzle 3 onto the object to be welded 10. The object to be welded 10 absorbs part of the flux mixture, and the excess flux mixture flows into the flux recovery tank 5 under the action of gravity.

[0050] 3) The flushing pump 6 draws a mixture of flux and water from the flux storage tank 1 and delivers it to the flux recovery tank 5 through the flushing pipeline 8. The mixture is flushed and mixed with the flux mixture that drips into the flux recovery tank 5 and then returned to the flux storage tank 1 through the return pipeline 9.

[0051] The above process is repeated continuously until the spraying process is completed, at which point the spray pump 2 and the rinsing pump 6 can be stopped.

[0052] As described above in the specific embodiments, the flux spraying system provided in this application, by setting up a rinsing sub-path, can rinse the flux recovery tank 5 to prevent flux sedimentation or to resuspend the sedimented flux in the water and allow it to flow back into the flux storage tank 1. This effectively solves the problem of difficult recovery and reuse of flux sedimentation in the flux recovery tank 5 in the prior art, reduces flux waste, and ensures the stability of the flux concentration in the flux storage tank 1, thereby improving the brazing effect. Moreover, it avoids the need for regular manual cleaning of the flux recovery tank 5, does not generate cleaning wastewater, reduces cleaning costs, and is more environmentally friendly.

[0053] In addition, the flux spraying system provided in this application, by rinsing the flux in the flux storage tank 1, can not only prevent the flux from settling in the flux recovery tank 5, but also accelerate the circulation of the flux in the flux storage tank 1, which is beneficial to the stirring of the flux solution in the flux storage tank 1, making it more uniform. Therefore, it can reduce the time or frequency of use of the stirring device in the flux storage tank 1, reduce the energy consumption of the stirring device, and extend the service life of the stirring device.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A flux spraying system for spraying flux onto an object (10) to be soldered, characterized in that: The flux spraying system includes a flux storage tank (1), flux nozzles (3), a spray pump (2), and a flux recovery tank (5); The spray pump (2) is connected to the flux storage tank (1) and the flux nozzle (3) through the spray pipeline (7) to draw flux from the flux storage tank (1) and deliver it to the flux nozzle (3); The flux recovery tank (5) is located below the flux nozzle (3) and connected to the flux storage tank (1) to receive the dripping flux and return it to the flux storage tank (1); The flux spraying system further includes a rinsing sub-path, which connects the flux storage tank (1) and the flux recovery tank (5) to obtain flux from the flux storage tank (1) to rinse the flux recovery tank (5).

2. The flux spraying system according to claim 1, characterized in that, The flushing sub-path includes a flushing pipeline (8) and a flushing pump (6) connected to the flushing pipeline (8). The flushing pump (6) is used to extract the flux in the flux storage tank (1) and spray it into the flux recovery tank (5) through the flushing pipeline (8).

3. The flux spraying system according to claim 1, characterized in that, The rinsing sub-circuit includes a rinsing line (8) connected to the spray pump (2) to rinse the flux recovery tank (5) by drawing flux from the flux storage tank (1) using the spray pump (2).

4. The flux spraying system according to any one of claims 1 to 3, characterized in that, The flushing sub-path includes a spray pipe (81) disposed within the flux recovery tank (5), with a gap between the spray pipe (81) and the bottom of the flux recovery tank (5), and a return port (51) disposed at the bottom of the flux recovery tank (5) opposite to the spray pipe (81); wherein: The two ends of the spray pipe (81) are respectively fixedly connected to the opposite side walls of the flux recovery tank (5), and the spray pipe (81) includes a plurality of spray holes facing the bottom of the flux recovery tank (5); Alternatively, one end of the spray pipe (81) is fixedly connected to the side wall of the flux recovery tank (5), and the other end is suspended in the flux recovery tank (5). The suspended end of the spray pipe (81) is either open or closed, and / or the spray pipe (81) includes a plurality of spray holes facing the bottom of the flux recovery tank (5).

5. The flux spraying system according to claim 4, characterized in that, The inner bottom surface of the flux recovery tank (5) is inclined downward from the end where the spray pipe (81) is located to the end where the return port (51) is located.

6. The flux spraying system according to claim 4, characterized in that, Both ends of the injection tube (81) are liquid inlets to deliver flux from both ends into the injection tube (81).

7. The flux spraying system according to claim 4, characterized in that, The flux spraying system includes a return pipe (9) with its two ends connected to the flux recovery tank (5) and the flux storage tank (1) respectively, and the return port (51) is connected to the flux storage tank (1) through the return pipe (9).

8. The flux spraying system according to any one of claims 1 to 3, characterized in that, The flux storage tank (1) is equipped with a stirring device.

9. The flux spraying system according to any one of claims 1 to 3, characterized in that, The flux spraying system includes a support platform for holding the object to be welded (10), the support platform being located in the vertical direction between the flux nozzle (3) and the flux recovery tank (5).

10. The flux spraying system according to claim 9, characterized in that, The support platform includes a conveyor belt (4) for moving the object to be welded (10) past the flux nozzle (3).

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