A tunnel type wave peak welds nitrogen protection device

Abstract

The application discloses a tunnel type wave peak welding nitrogen filling protection device and belongs to the technical field of tin material manufacturing for electronic packaging, which comprises at least four pipelines and two tin liquid pools for supporting the pipelines, four pipelines are arranged in a two-by-two group mode on the left and right of a wave peak spout and on the left and right of a two-wave peak spout of the two tin liquid pools respectively, the pipeline comprises a jet hole and an electromagnetic valve, a plurality of jet holes for jetting nitrogen are arranged on the outer surface of the pipeline at equal intervals in the axial direction, when tin liquid is welded on a workpiece, the electromagnetic valve can pump nitrogen in a nitrogen source into the inside of the pipeline, the electromagnetic valve can adjust the jetting speed of nitrogen, and the jet hole can jet out nitrogen after the nitrogen enters the inside of the pipeline. Since the jet holes are arranged in a row in the axial direction of the outer surface of the pipeline and the jetting angle of the jet hole is aligned with the connecting position of the tin liquid and the workpiece, the utilization rate of nitrogen can be improved.

Description

Technical Field

[0001] This invention relates to the field of electronic packaging tin material manufacturing technology, specifically a tunnel wave soldering nitrogen purging protection device. Background Technology

[0002] During soldering, molten solder is prone to oxidation when exposed to high temperatures, reacting with oxygen in the air to form oxidized solder dross. This not only wastes solder but can also affect the wettability and reliability of the solder joint. To address this issue, nitrogen purging technology is widely used in tunnel wave soldering machines. By introducing nitrogen gas into the soldering area to create an inert protective atmosphere, contact between air and the molten solder and the soldering interface is isolated, thereby inhibiting oxidation. Currently, nitrogen purging has become a key auxiliary means to improve the soldering quality of tunnel wave soldering machines and is widely used in the mass production of various electronic components. Related technologies, focusing on nitrogen supply, transmission, and maintenance of the protective atmosphere, have established a certain application foundation.

[0003] Authorization announcement number CN105945378B discloses a nitrogen protection device for a wave soldering machine, relating to the field of soldering. It includes at least two nitrogen nozzles and a cover for supporting the nitrogen nozzles. The nitrogen nozzles are connected to a nitrogen source and are located on both sides of the nozzle of the wave soldering machine. Multiple nanopores for nitrogen ejection are formed on the nitrogen nozzles. Using the nitrogen protection device provided by this invention, nitrogen is ejected from the nanopores of the nitrogen nozzles during soldering, uniformly spraying nitrogen in all directions. The nitrogen ejected from the nitrogen nozzles located on both sides of the nozzle can cover the entire surface area of ​​the covering liquid, and the nitrogen filling is more uniform, effectively reducing the oxygen concentration at the wave soldering nozzle, preventing the ejected solder from oxidizing, improving the soldering quality of PCB boards and other workpieces, reducing solder loss, and saving costs. Simultaneously, spraying nitrogen through nanopores results in high nitrogen utilization, saving approximately 30% of nitrogen, further reducing soldering costs. The invention also discloses a wave soldering machine including the above-mentioned nitrogen protection device. In this invention, multiple nanopores are axially opened on the outer peripheral surface of the nitrogen nozzle. Nitrogen gas is sprayed out from the nanopores of the nitrogen nozzle to uniformly spray nitrogen gas in all directions. This method will consume more nitrogen gas and reduce the efficiency of nitrogen gas use, thereby increasing the welding cost of the workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a tunnel-type wave soldering nitrogen protection device, which uses a row of air jets arranged axially on the outer surface of the pipe, with the jet angle of the air jets aimed at the connection between the molten solder and the workpiece, thereby improving the utilization rate of nitrogen and reducing unnecessary nitrogen consumption.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tunnel-type wave soldering nitrogen purging protection device, comprising: at least four pipes and two molten solder pools for supporting the pipes; the four pipes are respectively arranged in pairs on the left and right sides of the first wave soldering nozzle and the second wave soldering nozzle of the two molten solder pools; each pipe includes a jet nozzle and a solenoid valve; multiple jet nozzles for injecting nitrogen are axially and equidistantly opened on the outer surface of the pipe; a solenoid valve for controlling the flow rate of nitrogen is installed on the pipe; the pipe is connected to a nitrogen source through a flexible pipe; and the pipe includes a position adjustment component and an angle adjustment component.

[0006] The position adjustment assembly includes a drive plate, a guide plate, and a guide groove. Guide plates are rotatably mounted on the outer surfaces of both ends of the pipe near the molten tin pool. Guide grooves for sliding of the guide plates are opened at both ends of the molten tin pool. A drive plate is fixedly mounted on the side of one of the guide plates. The sliding of the drive plate and the guide plate in the guide groove allows the position of the pipe to be adaptively adjusted according to the height of the molten tin ejected from the first-peak nozzle and the second-peak nozzle.

[0007] The angle adjustment assembly includes a third gear, a fourth gear, and an arc-shaped toothed plate. The third gear is fixedly sleeved at the end of the pipe near the drive plate. The fourth gear is meshed with the side of the third gear. The arc-shaped toothed plate is meshed with the side of the fourth gear. The side of the arc-shaped toothed plate is movably connected to the end of the molten tin pool. When the pipe moves, it can rotate by the cooperation of the third gear, the fourth gear, and the arc-shaped toothed plate, so that the nitrogen gas ejected from the jet hole can always be aligned with the contact point between the molten tin and the workpiece.

[0008] Preferably, the position adjustment assembly further includes an arc-shaped sealing plate. An arc-shaped sealing plate is fixedly installed on the side of the guide plate near the inner cavity of the molten tin pool. The arc-shaped sealing plate is rotatably sleeved on the outer surface of the pipe, and the side of the arc-shaped sealing plate abuts against the inner cavity of the molten tin pool. The arc-shaped sealing plate can seal the guide groove when the pipe moves.

[0009] Preferably, the position adjustment assembly further includes a first rotating shaft, a bevel gear set, a second rotating shaft, a transmission assembly, a first gear, and a second gear. The first rotating shaft is rotatably mounted at the center of the upper part of one end of the molten tin pool, the bevel gear set is mounted at the end of the first rotating shaft, and a driving component A is mounted on the side of the bevel gear set.

[0010] Two second rotating shafts are rotatably mounted on the side of the molten tin pool near the guide groove. The two second rotating shafts are connected to the first rotating shaft through a transmission assembly. A first gear is fixedly sleeved on each of the two second rotating shafts. The side of one of the first gears is meshed with the drive plate, and the side of the other first gear is meshed with a second gear that is meshed with the drive plate. The second gear is rotatably mounted on the side of the molten tin pool.

[0011] Preferably, the angle adjustment assembly further includes a sleeve, a mounting plate, and a third rotating shaft. The sleeve is fitted onto the outer surface of the pipe. One end of the sleeve is fixedly mounted on the side of the drive plate. The mounting plate is fixedly mounted on the edge of the other end of the sleeve. The third rotating shaft is rotatably mounted on the side of the mounting plate. The other end of the third rotating shaft is fixedly mounted inside the fourth gear.

[0012] Preferably, the angle adjustment component further includes a cylinder, the bottom of the arc-shaped toothed plate is fixedly connected to the output end of the cylinder, the fixed end of the bottom of the cylinder is rotatably installed at the end of the molten tin pool, and the operation of the cylinder can actively adjust the spray angle of the jet nozzle.

[0013] Preferably, the pipeline further includes a recycling component, which includes an air inlet groove, a strip sealing plate, an air inlet hole, a filter, and an exhaust hole. The inner walls of the molten tin pool are provided with air inlet grooves on both sides, and a strip sealing plate is movably installed at one end of the air inlet groove near the molten tin pool.

[0014] An air inlet is provided through the outer surface of the strip sealing plate. A filter is installed on the outer surface of the molten tin pool near the air inlet groove. An exhaust port is installed on the side of the filter. An air pump is installed at one end of the exhaust port, and the filtered nitrogen is delivered to the nitrogen source through the air pump.

[0015] Preferably, the recycling assembly further includes a movable plate and a threaded rod. The movable plate is fixedly installed on the side of the strip-shaped sealing plate near the air inlet slot, and the threaded rod is threadedly connected to the outer surface of the movable plate.

[0016] The bottom end of the threaded rod is rotatably mounted on the bottom of the air inlet groove, and the top end of the threaded rod is rotatably connected through the top of the air inlet groove and connected to the drive component B. The drive component B is mounted on the top of the molten tin pool.

[0017] Preferably, the height of the strip sealing plate is twice the height of the air inlet groove, and the side of the strip sealing plate near the air inlet groove is provided with a protrusion that connects to the movable plate.

[0018] Preferably, the filter has openings on both sides near the air inlet and the exhaust port, and the openings of the filter allow the filter to communicate with the air inlet and the exhaust port.

[0019] Preferably, the guide grooves at both ends of the molten tin pool are provided with openings facing the inside of the molten tin pool, and the length of the arc-shaped sealing plate is twice the length of the guide groove opening.

[0020] Compared with the prior art, the beneficial effect of the present invention is: the tunnel wave soldering nitrogen protection device.

[0021] 1. When solder is applied to a workpiece, the solenoid valve can draw nitrogen from the nitrogen source into the pipeline. The solenoid valve can also adjust the nitrogen injection speed. After the nitrogen enters the pipeline, the jet nozzles will spray out the nitrogen. Since the jet nozzles are arranged in a row along the outer surface of the pipeline and the jet angle of the jet nozzles is aimed at the connection between the solder and the workpiece, the utilization rate of nitrogen can be improved and unnecessary nitrogen consumption can be reduced.

[0022] 2. When the drive component A is working, the first rotating shaft, bevel gear set, second rotating shaft, transmission assembly, first gear, second gear and other components work together to drive the drive plate to move. When the drive plate moves, it can slide in the guide groove. When the drive plate slides, it can drive the pipe to move. When the pipe moves, it will drive the guide plate to slide in the corresponding guide groove, so that the position of the pipe can be adaptively adjusted according to the height of the molten solder sprayed from the first peak nozzle and the second peak nozzle.

[0023] 3. The system is equipped with a pipe and a drive plate that, when moving, can drive the third and fourth gears through the cooperation of the components. When the fourth gear moves, it will mesh and rotate through the arc-shaped toothed plate. When the fourth gear meshes and rotates, it can drive the third gear to mesh and rotate. When the third gear meshes and rotates, it can drive the pipe to rotate. When the pipe rotates, it will rotate inside the drive plate, guide plate and arc-shaped sealing plate. When the pipe rotates, it will drive the air jet hole to rotate, so that the nitrogen gas sprayed from the air jet hole can always be aimed at the contact point between the liquid tin and the workpiece when the pipe moves.

[0024] 4. The cylinder is equipped to push the arc-shaped toothed plate to slide at the end of the molten tin pool. When the arc-shaped toothed plate slides, it will drive the fourth gear to mesh and rotate. When the fourth gear meshes and rotates, it can drive the third gear to rotate. When the third gear rotates, it can drive the pipe and the jet hole to rotate, so that the jet hole spray angle can be actively adjusted as needed.

[0025] 5. An air pump is installed to generate suction at the air inlet. The suction at the air inlet can draw nitrogen and exhaust gas into the air inlet tank. After entering the air inlet tank, the exhaust gas is filtered by a filter, while the nitrogen is delivered to the nitrogen source through the air inlet and air pump, reducing nitrogen loss and saving costs.

[0026] 6. When the height of the molten solder peak changes, the height of the molten solder on the inner wall of the molten solder pool also changes. At this time, the motor can drive the threaded rod to rotate. When the threaded rod rotates, it can drive the moving plate to slide vertically in the air inlet groove. When the moving plate slides vertically, it will drive the strip sealing plate to move vertically. When the strip sealing plate moves vertically, it can seal the connection between the molten solder pool and the strip sealing plate through the surface sealing gasket. At the same time as the strip sealing plate moves vertically, the position of the air inlet can be adjusted so that the air inlet can be adjusted according to the position of the molten solder. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure from a three-dimensional perspective of the present invention;

[0029] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0030] Figure 4 This is a three-dimensional magnified structural diagram of the position adjustment component and angle adjustment component of the present invention.

[0031] Figure 5 This is a magnified three-dimensional structural diagram of the position adjustment component and the angle adjustment component of the present invention.

[0032] Figure 6 This is a schematic diagram of the molten tin pool structure from a cross-sectional perspective of the present invention;

[0033] Figure 7 This is a schematic diagram of the molten tin pool structure from two perspectives.

[0034] Figure 8 This is a schematic diagram of the molten tin flow structure of the present invention.

[0035] In the diagram: 100, pipe; 101, jet nozzle; 102, solenoid valve;

[0036] 110. Position adjustment assembly; 111. Drive plate; 112. Guide plate; 113. Guide groove; 114. Arc-shaped sealing plate; 115. First rotating shaft; 116. Bevel gear set; 117. Second rotating shaft; 118. Transmission assembly; 119. First gear; 1110. Second gear;

[0037] 120. Angle adjustment assembly; 121. Third gear; 122. Sleeve; 123. Mounting plate; 124. Third rotating shaft; 125. Fourth gear; 126. Arc-shaped toothed plate; 127. Cylinder;

[0038] 130. Recycling component; 1311. Air inlet slot; 1312. Strip sealing plate; 1313. Air inlet port; 1314. Filter; 1315. Exhaust port; 1321. Moving plate; 1322. Threaded rod;

[0039] 200. Solder bath;

[0040] 300, a single-peak nozzle;

[0041] 400, two-wave peak nozzle. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0043] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Please see Figures 1-8 The present invention provides an embodiment of a tunnel-type wave soldering nitrogen protection device, comprising: at least four pipes 100 and two molten solder pools 200 for supporting the pipes 100. The four pipes 100 are respectively arranged in pairs around a first wave nozzle 300 and a second wave nozzle 400 of the two molten solder pools 200. Each pipe 100 includes a jet hole 101 and a solenoid valve 102. Multiple jet holes 101 for injecting nitrogen are axially and equidistantly opened on the outer surface of the pipe 100. A solenoid valve 102 for controlling the flow rate of nitrogen is installed on the pipe 100. The pipe 100 is connected to a nitrogen source through a flexible pipe. The pipe 100 includes a position adjustment component 110 and an angle adjustment component 120.

[0045] It should be noted that when the welding machine is working, the first-wave nozzle 300 and the second-wave nozzle 400 can spray the molten solder inside the molten solder pool 200. The molten solder can form turbulent waves and smooth waves respectively through the nozzles of the first-wave nozzle 300 and the second-wave nozzle 400. When the molten solder is sprayed out, it will weld the welding point at the bottom of the workpiece. When the molten solder is welding the workpiece, the solenoid valve 102 can draw nitrogen from the nitrogen source into the inside of the pipe 100. The solenoid valve 102 can also adjust the nitrogen injection speed. After the nitrogen enters the inside of the pipe 100, the jet nozzle 101 will spray the nitrogen to the position where the molten solder and the workpiece are in contact. Since the jet nozzles 101 are arranged in a row along the outer surface of the pipe 100 and the spray angle of the jet nozzles 101 is aimed at the connection between the molten solder and the workpiece, the utilization rate of nitrogen can be improved and unnecessary nitrogen consumption can be reduced.

[0046] The height of the molten solder sprayed from the first wave nozzle 300 and the second wave nozzle 400 is adjusted according to the different workpieces. The position and angle of the nitrogen spray can be adjusted by the cooperation of the position adjustment component 110 and the angle adjustment component 120, so that the nitrogen can always be aimed at the soldering point. The nitrogen can effectively reduce the oxygen concentration of the wave nozzle, prevent the sprayed solder from oxidizing, thereby improving the soldering quality of PCB boards and other workpieces, reducing solder loss and saving costs.

[0047] like Figures 1-7 As shown, the position adjustment assembly 110 includes a drive plate 111, a guide plate 112, and a guide groove 113. The guide plate 112 is rotatably mounted on the outer surface of both ends of the pipe 100 near the solder pool 200. The two ends of the solder pool 200 are provided with guide grooves 113 for sliding of the guide plate 112. The drive plate 111 is fixedly mounted on the side of one of the guide plates 112. The sliding of the drive plate 111 and the guide plate 112 in the guide groove 113 allows the position of the pipe 100 to be adaptively adjusted according to the height of the solder sprayed from the first peak nozzle 300 and the second peak nozzle 400.

[0048] It is conceivable that when the first gear 119 and the second gear 1110 rotate, they will drive the drive plate 111 to move through the arc-shaped tooth groove. When the drive plate 111 moves, it can slide in the guide groove 113. When the drive plate 111 slides, it can drive the pipe 100 to move. When the pipe 100 moves, it will drive the guide plate 112 to slide in the corresponding guide groove 113. When the position of the pipe 100 is adjusted, the position of the exhaust hole 1315 will be adjusted so that the exhaust hole 1315 can be adjusted according to the height of the molten solder.

[0049] like Figures 1-7As shown, the position adjustment assembly 110 also includes an arc-shaped sealing plate 114. The arc-shaped sealing plate 114 is fixedly installed on the side of the guide plate 112 near the inner cavity of the molten solder pool 200. The arc-shaped sealing plate 114 is rotatably sleeved on the outer surface of the pipe 100, and the side of the arc-shaped sealing plate 114 abuts against the inner cavity of the molten solder pool 200. The arc-shaped sealing plate 114 can seal the guide groove 113 when the pipe 100 moves. A sealing gasket is provided at the position of the arc-shaped sealing plate 114 near the inner cavity of the molten solder pool 200. The guide grooves 113 at both ends of the molten solder pool 200 are provided with openings facing the inner side of the molten solder pool 200. The length of the arc-shaped sealing plate 114 is twice the length of the opening of the guide groove 113.

[0050] It is worth noting that when the drive plate 111, guide plate 112 and pipe 100 move, they can drive the arc-shaped sealing plate 114 to move. When the arc-shaped sealing plate 114 moves, it can fit against the inner cavity of the molten solder pool 200. When the arc-shaped sealing plate 114 moves, it will drive the sealing gasket to move, thereby preventing the molten solder from leaking along the guide groove 113.

[0051] like Figures 1-7 As shown, the position adjustment assembly 110 also includes a first rotating shaft 115, a bevel gear set 116, a second rotating shaft 117, a transmission assembly 118, a first gear 119, and a second gear 1110. The first rotating shaft 115 is rotatably mounted at the center of the upper part of one end of the molten solder pool 200. The bevel gear set 116 is mounted at the end of the first rotating shaft 115. The bevel gear set 116 is generally composed of two bevel gears. A driving component A, which can be a motor, is mounted on the side of the bevel gear set 116. The sides of the molten solder pool 200 near the guide groove 113 are rotatably mounted on... It is equipped with two second rotating shafts 117, which are connected to the first rotating shaft 115 through a transmission assembly 118. The transmission assembly 118 is generally composed of two pulleys and belts and other components. A first gear 119 is fixedly sleeved on each of the two second rotating shafts 117. The side of one of the first gears 119 is meshed with the drive plate 111, and the side of the other first gear 119 is meshed with a second gear 1110 that is meshed with the drive plate 111. The second gear 1110 is rotatably mounted on the side of the molten solder pool 200.

[0052] It is understood that when the motor is working, it drives the first bevel gear to rotate. When the first bevel gear rotates, it drives the second bevel gear to mesh and rotate. When the second bevel gear meshes and rotates, it drives the first shaft 115 to rotate at the end of the molten solder pool 200. When the first shaft 115 rotates, it drives the first transmission wheel on the surface to rotate. When the first transmission wheel rotates, it drives the belt to rotate. When the belt rotates, it drives the second transmission wheel to rotate. When the second transmission wheel rotates, it drives the second shaft 117 to rotate at the end of the molten solder pool 200. When the second shaft 117 rotates, it drives the first gear 119 on the surface to rotate. When one of the first gears 119 rotates, it drives the second gear 1110 to mesh and rotate. When the first gear 119 and the second gear 1110 rotate, they drive the drive plate 111 to mesh and move. When the drive plate 111 meshes and moves, it adjusts the position of the pipe 100.

[0053] like Figures 1-7 As shown, the angle adjustment assembly 120 includes a third gear 121, a fourth gear 125, and an arc-shaped toothed plate 126. The third gear 121 is fixedly sleeved at the end of the pipe 100 near the drive plate 111. The fourth gear 125 is meshed with the side of the third gear 121. The arc-shaped toothed plate 126 is meshed with the side of the fourth gear 125. The side of the arc-shaped toothed plate 126 is movably connected to the end of the molten tin pool 200. When the pipe 100 moves, it can rotate by the cooperation of the third gear 121, the fourth gear 125, and the arc-shaped toothed plate 126, so that the nitrogen gas sprayed from the jet hole 101 can always be aligned with the contact point between the liquid tin and the workpiece when the pipe 100 moves.

[0054] It should be understood that when the pipe 100 and the drive plate 111 move, they can drive the third gear 121 and the fourth gear 125 to move through the cooperation of the components. When the fourth gear 125 moves, it will mesh and rotate through the arc-shaped toothed plate 126. When the fourth gear 125 meshes and rotates, it can drive the third gear 121 to mesh and rotate. When the third gear 121 meshes and rotates, it can drive the pipe 100 to rotate. When the pipe 100 rotates, it will rotate inside the drive plate 111, the guide plate 112 and the arc-shaped sealing plate 114. When the pipe 100 rotates, it will adjust the nitrogen injection angle of the jet hole 101.

[0055] like Figures 1-7 As shown, the angle adjustment assembly 120 also includes a sleeve 122, a mounting plate 123, and a third rotating shaft 124. The sleeve 122 is sleeved on the outer surface of the pipe 100. One end of the sleeve 122 is fixedly mounted on the side of the drive plate 111. The mounting plate 123 is fixedly mounted on the edge of the other end of the sleeve 122. The third rotating shaft 124 is rotatably mounted on the side of the mounting plate 123. The other end of the third rotating shaft 124 is fixedly mounted inside the fourth gear 125.

[0056] It should be noted that when the drive plate 111 slides inside the guide groove 113, it can drive the sleeve 122 to move. When the sleeve 122 moves, it will drive the mounting plate 123 at the end to move. When the mounting plate 123 moves, it can drive the third rotating shaft 124 to move. When the third rotating shaft 124 moves, it will drive the fourth gear 125 to move. When the fourth gear 125 moves, it can mesh and rotate through the arc-shaped toothed plate 126. When the fourth gear 125 meshes and rotates, it can drive the third rotating shaft 124 to rotate. When the third rotating shaft 124 rotates, it will rotate with the mounting plate 123.

[0057] like Figures 1-7 As shown, the angle adjustment assembly 120 also includes a cylinder 127. The bottom of the arc-shaped toothed plate 126 is fixedly connected to the output end of the cylinder 127. The fixed end of the bottom of the cylinder 127 is rotatably installed at the end of the molten tin pool 200. The operation of the cylinder 127 can actively adjust the spray angle of the jet nozzle 101.

[0058] It is conceivable that the operation of cylinder 127 can push the arc-shaped toothed plate 126 to slide at the end of the molten tin pool 200. When the arc-shaped toothed plate 126 slides, it will drive the fourth gear 125 to mesh and rotate. When the fourth gear 125 meshes and rotates, it can drive the third gear 121 to rotate. When the third gear 121 rotates, it can drive the pipe 100 and the jet hole 101 to rotate, so that the jet angle of the jet hole 101 can be actively adjusted as needed.

[0059] like Figures 1-8 As shown, the pipeline 100 also includes a recovery assembly 130, which includes an air inlet slot 1311, a strip sealing plate 1312, an air inlet 1313, a filter 1314, and an exhaust port 1315. Air inlet slots 1311 are provided through both sides of the inner wall of the molten tin pool 200. A strip sealing plate 1312 is movably installed at one end of the air inlet slot 1311 near the cavity of the molten tin pool 200. A sealing gasket is provided at the contact point between the strip sealing plate 1312 and the inner wall of the molten tin pool 200. An air inlet 1313 is provided through the outer surface of the strip sealing plate 1312. An air inlet 1313 is installed on the outer surface of the molten tin pool 200 near the air inlet slot 1311. The filter 1314 is equipped with a filter 1314. An exhaust port 1315 is installed on the side of the filter 1314. An air pump is installed at one end of the exhaust port 1315, and the filtered nitrogen is delivered to the nitrogen source by the air pump. The height of the strip sealing plate 1312 is twice the height of the air inlet groove 1311. The side of the strip sealing plate 1312 near the air inlet groove 1311 is provided with a protrusion that connects to the moving plate 1321. The filter 1314 is provided with openings on both sides near the air inlet groove 1311 and the exhaust port 1315. The openings of the filter 1314 allow the filter 1314 to communicate with the air inlet groove 1311 and the exhaust port 1315.

[0060] It is worth noting that when the first-wave nozzle 300 and the second-wave nozzle 400 spray the molten solder from inside the molten solder pool 200, the molten solder will exhibit a shape that is high in the middle and low on both sides. The molten solder flows from the middle position of the first-wave nozzle 300 and the second-wave nozzle 400 to both sides. When the molten solder flows to both sides, it will carry the unconsumed nitrogen gas and the exhaust gas from the soldering process to both sides. When the nitrogen gas flows to the inner wall of the molten solder pool 200, the air pump can generate suction in the air inlet 1313. The suction in the air inlet 1313 can draw nitrogen gas and exhaust gas into the air inlet groove 1311. After entering the air inlet groove 1311, the nitrogen gas and exhaust gas can be filtered by the filter 1314. The nitrogen gas is then transported to the nitrogen source through the air inlet 1313 and the air pump, reducing nitrogen gas loss and saving costs.

[0061] like Figures 1-8 As shown, the recycling assembly 130 also includes a movable plate 1321 and a threaded rod 1322. The movable plate 1321 is fixedly installed on the side of the strip-shaped sealing plate 1312 near the air inlet groove 1311. The threaded rod 1322 is threaded through the outer surface of the movable plate 1321. The bottom end of the threaded rod 1322 is rotatably installed at the bottom of the air inlet groove 1311, and the top end of the threaded rod 1322 is rotatably connected through the top of the air inlet groove 1311 and connected to the drive component B. The drive component B is installed on the top of the molten tin pool 200. The drive component B can be a motor.

[0062] It is clear that when the height of the molten solder peak changes, the height of the molten solder on the inner wall of the molten solder pool 200 also changes. At this time, the motor can drive the threaded rod 1322 to rotate. When the threaded rod 1322 rotates, it can drive the moving plate 1321 to slide vertically in the air inlet groove 1311. When the moving plate 1321 slides vertically, it will drive the strip sealing plate 1312 to move vertically. When the strip sealing plate 1312 moves vertically, it can seal the connection between the molten solder pool 200 and the strip sealing plate 1312 through the surface sealing gasket. While the strip sealing plate 1312 moves vertically, it can adjust the position of the air inlet 1313 so that the air inlet 1313 can be adjusted according to the position of the molten solder.

[0063] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tunnel wave-soldering nitrogen-filling protection device, comprising: At least four pipes and two tin liquid pools for supporting the pipes, the four pipes are arranged on the left and right of the one-peak spout and the two-peak spout of the two tin liquid pools respectively in pairs, the pipe comprises a jet hole and a solenoid valve, a plurality of jet holes for jetting nitrogen are arranged on the outer surface of the pipe at equal intervals in the axial direction, a solenoid valve for controlling the flow of nitrogen is installed on the pipe, and the pipe is connected to a nitrogen source through a flexible pipe, characterized in that: the pipe comprises a position adjusting assembly and an angle adjusting assembly; The position adjusting assembly comprises a driving plate, a guide plate and a guide groove, the outer surface of the pipe near the two ends of the tin liquid pool is rotatably provided with a guide plate, the two ends of the tin liquid pool are provided with a guide groove for sliding of the guide plate, the side surface of one of the guide plates is fixedly provided with a driving plate, and sliding of the driving plate and the guide plate in the guide groove can adaptively adjust the position of the pipe according to the height of the tin liquid jetted from the one-peak spout and the two-peak spout. The angle adjusting assembly comprises a third gear, a fourth gear and an arc-shaped tooth groove plate, the end of the pipe close to the driving plate is fixedly sleeved with a third gear, the side surface of the third gear is meshingly connected with a fourth gear, the side surface of the fourth gear is meshingly connected with an arc-shaped tooth groove plate, and the side surface of the arc-shaped tooth groove plate is movably connected to the end of the tin liquid pool, so that the pipe can rotate by itself when moving through cooperation of the third gear, the fourth gear and the arc-shaped tooth groove plate, and the nitrogen jetted from the jet hole can always be aligned with the contact position of the liquid tin and the workpiece.

2. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 1, characterized in that: The position adjusting assembly further comprises an arc-shaped sealing plate, one side of the guide plate close to the inner cavity of the tin liquid pool is fixedly provided with an arc-shaped sealing plate, the arc-shaped sealing plate is rotatably sleeved on the outer surface of the pipe, and the side surface of the arc-shaped sealing plate abuts against the inner cavity of the tin liquid pool, so that the arc-shaped sealing plate can seal the guide groove when the pipe moves.

3. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 2, characterized in that: The position adjusting assembly further comprises a first rotating shaft, a bevel gear set, a second rotating shaft, a transmission assembly, a first gear and a second gear, a first rotating shaft is rotatably installed at the upper middle of one end of the tin liquid pool, a bevel gear set is installed at the end of the first rotating shaft, and a driving part A is installed on the side surface of the bevel gear set; Two second rotating shafts are rotatably installed on the side surface of the tin liquid pool close to the guide groove, the two second rotating shafts and the first rotating shaft are connected through a transmission assembly, a first gear is fixedly sleeved on each of the two second rotating shafts, the side surface of one of the first gears is meshingly connected with the driving plate, the side surface of the other first gear is meshingly connected with a second gear which is meshingly connected with the driving plate, and the second gear is rotatably installed on the side surface of the tin liquid pool.

4. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 1, characterized in that: The angle adjusting assembly further comprises a sleeve, a mounting plate and a third rotating shaft, a sleeve is sleeved on the outer surface of the pipe, one end of the sleeve is fixedly installed on the side surface of the driving plate, a mounting plate is fixedly installed on the edge of the other end of the sleeve, a third rotating shaft is rotatably installed on the side surface of the mounting plate, and the other end of the third rotating shaft penetrates and is fixedly installed in the interior of the fourth gear.

5. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 4, characterized in that: The angle adjusting assembly further comprises a cylinder, a bottom of the arc-shaped tooth slot plate is fixedly connected with an output end of the cylinder, a fixed end of a bottom of the cylinder is rotatably installed at an end of the tin liquid pool, and the cylinder is capable of actively adjusting the jet angle of the jet hole.

6. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 1, characterized in that: The pipeline further comprises a recycling assembly, the recycling assembly comprises an air inlet groove, a strip-shaped sealing plate, an air inlet hole, a filter and an air outlet hole, air inlet grooves are formed through two sides of an inner wall of the tin liquid pool cavity, and the strip-shaped sealing plate is movably installed at one end of the air inlet groove close to the tin liquid pool cavity; An air inlet hole is formed through an outer surface of the strip-shaped sealing plate, the filter is installed on an outer surface of the tin liquid pool close to the air inlet groove, an air outlet hole is installed on a side of the filter, one end of the air outlet hole is installed with a gas pump, and the filtered nitrogen gas is delivered into the nitrogen source through the gas pump.

7. A tunnel type wave-soldering nitrogen-filling protection device according to claim 6, characterized in that: The recycling assembly further comprises a moving plate and a threaded rod, the moving plate is fixedly installed on a side of the strip-shaped sealing plate close to the air inlet groove, and the threaded rod is threadedly connected through an outer surface of the moving plate; A bottom end of the threaded rod is rotatably installed at a bottom of the air inlet groove, a top end of the threaded rod is rotatably connected through a top of the air inlet groove, and the top end is connected with a driving part B, and the driving part B is installed at a top of the tin liquid pool.

8. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 7, characterized in that: The height of the strip-shaped sealing plate is twice the height of the air inlet groove, and a protruding block is arranged on one side of the strip-shaped sealing plate close to the air inlet groove and connected with the moving plate.

9. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 6, characterized by: Openings are arranged on two sides of the filter close to the air inlet groove and the air outlet hole, and the openings of the filter are capable of communicating the filter with the air inlet groove and the air outlet hole.

10. The nitrogen-filled tunnel-type wave-soldering protection device according to claim 2, characterized by: The guiding grooves at two ends of the tin liquid pool are each provided with an opening facing the inside of the tin liquid pool, and the length of the arc-shaped sealing plate is twice the length of the opening of the guiding groove. The length of the arc-shaped sealing plate is twice the length of the opening of the guiding groove.

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