Soldering flux recovery device of reflow soldering furnace

Abstract

The invention discloses a soldering flux recovery device of a reflow soldering furnace, and relates to the technical field of reflow soldering furnaces. The device comprises a U-shaped table, a recycling box is fixedly installed at the top of the U-shaped table, a first linear guide rail is fixedly installed in the recycling box, a filtering frame is placed at the top of the first linear guide rail, and a first sliding strip matched with the first linear guide rail is fixedly installed at the bottom of the filtering frame; and folding filter cotton is fixedly mounted in the filter frame. By arranging the sealed gas inlet assembly, gas mixed with rosin particles can be conveyed to the two sides of the filter frame through the three-way gas inlet pipe, so that the gas is adsorbed and filtered by the folded filter cotton, the sealed gas inlet assembly can guarantee the sealing performance in the gas inlet process, gas is conveyed into the folded filter cotton from the two sides, and the adsorption contact area is guaranteed; meanwhile, when the folded filter cotton needs to be washed, the butt joint air pipe can be shrunk and reset, and the filter frame can conveniently move towards the interior of the washing chamber.

Description

Technical Field

[0001] The invention relates to the technical field of reflow soldering furnaces, and in particular to a soldering flux recovery device for a reflow soldering furnace. Background Art

[0002] Reflow soldering technology is mostly used for soldering components on circuit boards. There is a heating circuit inside the reflow soldering furnace, which heats the air or nitrogen to a high enough temperature and blows it toward the circuit board with components already attached, so that the solder on both sides of the components melts and bonds with the mainboard. The reflow soldering furnace relies on the effect of hot air flow on the solder joints. The gel-like flux undergoes a physical reaction under a certain high-temperature airflow to achieve SMD soldering. Because the gas circulates in the welding machine to generate high temperature to achieve the purpose of soldering, it is called "reflow soldering".

[0003] In reflow soldering technology, flux is an indispensable auxiliary material in the flux, which can make up for the disadvantage of low fluidity of lead-free solder paste and greatly reduce the generation rate of by-products such as oxides. Traditional flux is usually an active flux based on rosin, supplemented by activators, film-forming substances, additives and solvents. In the reflow soldering process, there will be a large number of rosin particles that are dispersed by heat and cannot be put into the actual welding operation, which not only causes a waste of flux, but also affects the subsequent welding quality. For this reason, a reflow soldering furnace flux recovery device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the reflow soldering process, a large amount of rosin particles that are dispersed by heat cannot be put into the actual welding operation, which not only causes a waste of flux but also affects the subsequent welding quality. The present invention provides a reflow soldering furnace flux recovery device.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A solder flux recovery device for a reflow soldering furnace comprises a U-shaped platform, a recovery box is fixedly installed on the top of the U-shaped platform, a first linear guide is fixedly installed inside the recovery box, a filter frame is placed on the top of the first linear guide, a first slide bar adapted to the first linear guide is fixedly installed on the bottom of the filter frame, a folded filter cotton is fixedly installed inside the filter frame, a gas-liquid discharge hole is provided at the bottom of the filter frame, a vertically arranged partition is fixedly installed inside the recovery box, a gas filter chamber and a flushing chamber are respectively provided on both sides of the partition, and an inlet is provided on the inner wall on both sides of the gas filter chamber. Air hole, the two air inlet holes are respectively located on both sides of the folded filter cotton, a three-way air inlet pipe is arranged on the top of the recovery box, the two bottom ends of the three-way air inlet pipe are respectively connected with the two air inlet holes, the two bottom ends of the three-way air inlet pipe are provided with a sealed air inlet assembly that can make the bottom end of the three-way air inlet pipe dock and seal with the filter frame, the interior of the flushing chamber is provided with a flushing recovery assembly that can send the filter frame into the interior of the flushing chamber and flush the folded filter cotton, and the bottom of the recovery box is provided with a sealed collection assembly for collecting filtered gas and liquid.

[0007] Furthermore, the sealed air intake assembly includes two telescopic boxes fixedly installed on the two bottom ends of the three-way air intake pipe, and docking air pipes are slidably installed inside the two telescopic boxes. The two docking air pipes are respectively adapted to the two air intake holes, and a horizontally arranged air intake end electric push rod is fixedly installed on the top of the telescopic box. The telescopic ends of the two air intake end electric push rods are respectively fixedly connected to the side walls of the two docking air pipes, and airtight rubber rings are fixedly sleeved on the two docking air pipes. A yield hole is provided on the side wall of the partition, and an exhaust hole corresponding to the position of the gas-liquid discharge hole is provided at the bottom of the air filter chamber.

[0008] Furthermore, the flushing and recovery component includes two assembly holes respectively opened on the inner walls on both sides of the flushing chamber, and the two assembly holes are fixedly installed with spray disks inside. A three-way solvent tube is arranged on the top of the recovery box, and the two bottom ends of the three-way solvent tube are respectively fixedly connected to the two spray disks, the first linear guide rail passes through the give way hole and extends to the interior of the flushing chamber, a power box is fixedly installed on one side of the recovery box, and a horizontally arranged transposition electric push rod is fixedly installed inside the power box, a through hole is opened on the inner wall of the air filter chamber, the telescopic end of the transposition electric push rod passes through the through hole and is fixedly connected to the filter frame, and a drainage hole corresponding to the position of the gas-liquid discharge hole is opened at the bottom of the flushing chamber.

[0009] Further, connection blocks are fixedly installed on both sides of the filter frame. Airtight discs are arranged on both sides of the filter frame. Both of the airtight discs are fixedly connected to the filter frame through the connection blocks. Limiting sliding holes adapted to the first linear guide rail are formed at the bottoms of the airtight discs. The telescopic end of the transposition electric push rod is fixedly installed on the side wall of one of the airtight discs. The two airtight discs are respectively located inside the air filtering chamber and the flushing chamber.

[0010] Further, the sealed collection assembly includes an air extraction pipe and a liquid extraction pipe arranged at the bottom of the recycling box. Collection boxes are fixedly installed at the tops of the air extraction pipe and the liquid extraction pipe respectively. Vertically arranged collection inner sliding pipes are slidably installed inside the collection boxes. The two collection inner sliding pipes correspond to the positions of the exhaust holes and the liquid discharge holes respectively. The collection inner sliding pipes are all adapted to the gas-liquid discharge holes. Vertically arranged collection end electric push rods are fixedly installed on the side walls of the collection boxes. The telescopic ends of the two collection end electric push rods are respectively fixedly connected to the side walls of the two collection inner sliding pipes.

[0011] Further, airtight rubber sleeves are fixedly sleeved on the collection inner sliding pipes. The two airtight rubber sleeves are respectively slidably installed inside the exhaust holes and the liquid discharge holes.

[0012] Further, a furnace inner air pipe is arranged at one end of the three-way inlet air pipe away from the recycling box. An inlet air inner sliding pipe is slidably installed inside the one end of the three-way inlet air pipe away from the recycling box. One end of the inlet air inner sliding pipe is fixedly connected to one end of the furnace inner air pipe. A hanging telescopic pipe is slidably installed inside the bottom end of the furnace inner air pipe. An air extraction disc is fixedly installed at the bottom end of the hanging telescopic pipe. A vertically arranged hanging electric push rod is fixedly installed at the bottom end of the furnace inner air pipe. The telescopic end of the hanging electric push rod is fixedly connected to the air extraction disc.

[0013] Further, second sliding strips are fixedly installed at the bottoms of the telescopic boxes. Two second linear guide rails are fixedly installed at the top of the U-shaped platform. The two second sliding strips are respectively slidably installed on the two second linear guide rails.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By setting the sealed air inlet assembly, the gas mixed with rosin particles can be respectively transported to both sides of the filter frame through the three-way inlet air pipe, and thus adsorbed and filtered by the folded filter cotton. The sealed air inlet assembly can ensure the airtightness during the air inlet process, transport the gas into the folded filter cotton from both sides, ensure the adsorption contact area, improve the adsorption efficiency, and at the same time, when it is necessary to flush the folded filter cotton, the docking air pipe can contract and reset, facilitating the movement of the filter frame towards the inside of the flushing chamber;

[0016] 2. By providing a flushing and recycling component, after the folded filter cotton has adsorbed for a long time, the electric push rod for position change drives the filter frame to slide into the flushing chamber. The rosin solvent delivery device sprays the solvent into the interior of the folded filter cotton through two jet trays, dissolving most of the rosin particles deposited inside the folded filter cotton, and then discharging them through the gas-liquid discharge holes, achieving the recycling of rosin particles, extending the single-use cycle of the folded filter cotton. After waiting for the folded filter cotton to dry, the flushing and recycling component drives the folded filter cotton to reset and starts filtering air again;

[0017] 3. By providing a sealing and collection component, when the filter frame slides into the air filtering chamber or the flushing chamber, the two collecting end electric push rods will synchronously drive the two collecting inner sliding tubes to move upward and insert them into the exhaust hole and the liquid discharge hole respectively, facilitating the discharge of gas or mixed solvent, and at the same time limiting the position of the filter frame. After the air filtering or flushing is completed, the collecting end electric push rod drives the collecting inner sliding tube to reset, releasing the limit, so that the filter frame can continue to slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a first perspective three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 is a second perspective three-dimensional structural schematic diagram of the present invention;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the cooperation between the recycling box and the filter frame of the present invention;

[0021] Figure 4 is a first perspective three-dimensional structural schematic diagram of the filter frame of the present invention;

[0022] Figure 5 is a second perspective three-dimensional structural schematic diagram of the filter frame of the present invention;

[0023] Figure 6 is a three-dimensional structural schematic diagram of the interior of the recycling box of the present invention;

[0024] Figure 7 is a three-dimensional structural schematic diagram of the sealing air intake component of the present invention;

[0025] Figure 8 is a three-dimensional structural schematic diagram of the sealing collection component of the present invention;

[0026] Reference numerals: 1, U-shaped table; 2, recycling bin; 201, air inlet hole; 202, exhaust hole; 203, assembly hole; 204, sliding hole; 205, liquid discharge hole; 3, first linear guide rail; 4, filter box; 401, gas-liquid discharge hole; 5, first sliding strip; 6, folded filter cotton; 7, three-way inlet pipe; 8, extraction pipe; 9, partition board; 901, relief hole; 10, air filtration chamber; 11, flushing chamber; 12, telescopic box; 13, docking air pipe; 14, airtight rubber ring; 15, electric push rod at the air inlet end; 16, second sliding strip; 17, second linear guide rail; 18, inner sliding pipe at the air inlet; 19, gas pipe inside the furnace; 20, hanging telescopic pipe; 21, extraction disc; 22, hanging electric push rod; 23, three-way solvent pipe; 24, jet disc; 25, power box; 26, electric push rod for position change; 27, liquid extraction pipe; 28, connecting block; 29, airtight disc; 2901, limiting sliding hole; 30, collection box; 31, inner sliding pipe at the collection end; 32, electric push rod at the collection end; 33, airtight rubber sleeve. Detailed implementation mode

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0029] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "inner", "outer", "upper", etc. are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0031] Such asFigures 1 to 8 As shown, a soldering flux recovery device for a reflow soldering furnace includes a U-shaped table 1, as shown in FIG. Figure 1 As shown, a recovery box 2 is fixedly installed on the top of the U-shaped platform 1. Figure 6 As shown, a first linear guide rail 3 is fixedly installed inside the recovery box 2. Figure 3 As shown, a filter frame 4 is placed on the top of the first linear guide rail 3. Figure 5 As shown, a first slide bar 5 adapted to the first linear guide rail 3 is fixedly installed at the bottom of the filter frame 4, a folded filter cotton 6 is fixedly installed inside the filter frame 4, and a gas-liquid discharge hole 401 is opened at the bottom of the filter frame 4, as shown in FIG. Figure 6 As shown, a vertical partition 9 is fixedly installed inside the recovery box 2, and a filter chamber 10 and a flushing chamber 11 are respectively arranged on both sides of the partition 9. Air inlet holes 201 are opened on the inner walls of both sides of the filter chamber 10, and the two air inlet holes 201 are respectively located on both sides of the folded filter cotton 6. Figure 1 As shown, a three-way air inlet pipe 7 is arranged on the top of the recovery box 2, and the two bottom ends of the three-way air inlet pipe 7 are respectively connected to the two air inlet holes 201, and the two bottom ends of the three-way air inlet pipe 7 are provided with a sealed air inlet assembly that can make the bottom end of the three-way air inlet pipe 7 and the filter frame 4 dock and seal, and the interior of the flushing chamber 11 is provided with a flushing recovery assembly that can send the filter frame 4 into the interior of the flushing chamber 11 and flush the folded filter cotton 6. In this embodiment, a fan and other drying equipment can be arranged inside the flushing chamber 11, so that the folded filter cotton 6 after flushing can be quickly dried, and a sealed collection assembly for collecting filtered gas and liquid is arranged at the bottom of the recovery box 2; specifically, when the solder flux recovery device for the reflow soldering furnace is in use, one end of the three-way air inlet pipe 7 is connected to the inside of the reflow soldering furnace, and during the reflow soldering process of the circuit board, the sealed collection assembly connected to the gas treatment equipment will be recycled. The box 2 and the three-way air inlet pipe 7 suck the gas in the cooling zone, so that the rosin particles diffused around the circuit board are transported to the air filter chamber 10 inside the recovery box 2 together with the gas, and enter the filter frame 4 from both sides, so that the rosin particles in the gas are cooled and deposited in the air filter chamber 10, and are adsorbed and filtered by the folded filter cotton 6, so that the gas with the particles removed is transported to the gas treatment equipment through the gas-liquid discharge hole 401 for treatment and recovery, so as to realize the recovery of the rosin particles. At the same time, after the folded filter cotton 6 is used for a long time, the flushing and recovery component will send the filter frame 4 into the flushing chamber 11, and the rosin solvent delivery device will deliver the rosin solvent to the flushing chamber 11 to flush the folded filter cotton 6, so that the rosin particles accumulated in the folded filter cotton 6 are dissolved and transported to the liquid suction device and the storage device through the gas-liquid discharge hole 401 for temporary storage, so as to prepare for subsequent purification and recovery, thereby realizing the automatic separation and recovery of the rosin.

[0032] like Figure 7As shown in the figure, the sealed air inlet assembly includes two telescopic boxes 12 respectively and fixedly installed at the two bottom ends of the three-way air inlet pipe 7. Inside each of the two telescopic boxes 12, a docking air pipe 13 is slidably installed. The two docking air pipes 13 are respectively adapted to the two air inlet holes 201. At the top of each telescopic box 12, a horizontally arranged air inlet end electric push rod 15 is fixedly installed. The telescopic ends of the two air inlet end electric push rods 15 are respectively fixedly connected to the side walls of the two docking air pipes 13. An airtight rubber ring 14 is fixedly sleeved on each of the two docking air pipes 13. As Figure 6 shown in the figure, a relief hole 901 is opened on the side wall of the partition plate 9, and an exhaust hole 202 corresponding to the position of the gas-liquid discharge hole 401 is opened at the bottom of the air filtration chamber 10. Specifically, by providing the sealed air inlet assembly, when it is necessary to filter the rosin particles, the air inlet end electric push rods 15 on both sides of the recovery box 2 will respectively drive the two docking air pipes 13 to slide into the air inlet holes 201 on both sides of the air filtration chamber 10 and be inserted into both sides of the filter frame 4. At this time, the two airtight rubber rings 14 will cover the joints for sealing. Then, the gas mixed with rosin particles will be respectively transported to both sides of the filter frame 4 through the two ends of the three-way air inlet pipe 7 and the two groups of telescopic boxes 12 and docking air pipes 13, and thus be adsorbed and filtered by the folded filter cotton 6. The sealed air inlet assembly can ensure the airtightness during the air inlet process, transport the gas into the folded filter cotton 6 from both sides, ensure the adsorption contact area, improve the adsorption efficiency, and at the same time, when it is necessary to wash the folded filter cotton 6, the docking air pipe 13 can be contracted and reset, so as to release the limit on the filter frame 4 and facilitate the movement of the filter frame 4 towards the inside of the washing chamber 11.

[0033] As Figure 6 shown in the figure, the washing and recovery assembly includes two assembly holes 203 respectively opened on the inner walls of both sides of the washing chamber 11. As Figure 3 shown in the figure, a jet disk 24 is fixedly installed inside each of the two assembly holes 203. A three-way solvent pipe 23 is arranged on the top of the recovery box 2. In this embodiment, one end of the three-way solvent pipe 23 is communicated with a rosin solvent conveying device for conveying a solvent that can dissolve rosin. The two bottom ends of the three-way solvent pipe 23 are respectively fixedly connected to the two jet disks 24. The first linear guide rail 3 passes through the relief hole 901 and extends into the inside of the washing chamber 11. A power box 25 is fixedly installed on one side of the recovery box 2. Inside the power box 25, a horizontally arranged displacement electric push rod 26 is fixedly installed. As Figure 6As shown, a through hole 204 is provided on the inner wall of the air filter chamber 10, and the telescopic end of the transposition electric push rod 26 passes through the through hole 204 and is fixedly connected to the filter frame 4, and a drainage hole 205 corresponding to the position of the gas-liquid discharge hole 401 is provided at the bottom of the flushing chamber 11; specifically, by setting a flushing recovery component, after the folded filter cotton 6 is adsorbed for a long time, the sealed air intake component is reset and the limit of the filter frame 4 is released, at this time, the transposition electric push rod 26 drives the filter frame 4 to slide along the first linear guide rail 3 into the flushing chamber 11 and position it, and then the rosin solvent delivery device delivers the rosin solvent to the two jet disks 24 respectively through the three-way solvent pipe 23, so that the solvent is sprayed into the inside of the folded filter cotton 6 through the jet disks 24 on both sides, so that most of the rosin particles deposited in the folded filter cotton 6 are dissolved by the solvent, and then discharged through the gas-liquid discharge hole 401, so as to realize the recovery of the rosin particles, extend the single use cycle of the folded filter cotton 6, wait for the folded filter cotton 6 to dry, and the flushing recovery component drives the folded filter cotton 6 to reset, and restart the air filtering.

[0034] like Figure 5 As shown, connecting blocks 28 are fixedly installed on both sides of the filter frame 4, and airtight sealing discs 29 are arranged on both sides of the filter frame 4. The two airtight sealing discs 29 are fixedly connected to the filter frame 4 through the connecting blocks 28. The bottom of the airtight sealing discs 29 is provided with limiting sliding holes 2901 adapted to the first linear guide rail 3. The telescopic end of the transposition electric push rod 26 is fixedly installed on the side wall of one of the airtight sealing discs 29. The two airtight sealing discs 29 are respectively located inside the air filter chamber 10 and the flushing chamber 11. In this embodiment, the cross-sectional size of the airtight sealing disc 29 is slightly larger than the cross-sectional size of the filter frame 4 and the inner diameter size of the clearance hole 901; specifically, by arranging the airtight sealing discs 29, when the filter frame 4 slides and transposes in the air filter chamber 10 and the flushing chamber 11, the two airtight sealing discs 29 will alternately cover one side of the partition 9, thereby sealing the gap of the clearance hole 901, thereby improving the sealing between the air filter chamber 10 and the flushing chamber 11 during air filtering and flushing.

[0035] like Figure 2 As shown, the sealed collection assembly includes an air extraction pipe 8 and a liquid extraction pipe 27 disposed at the bottom of the recovery box 2. In this embodiment, one end of the air extraction pipe 8 is connected to the gas processing device, and one end of the liquid extraction pipe 27 is connected to the liquid suction device and the storage device. Figure 8As shown in the figure, collection boxes 30 are fixedly installed at the tops of the air extraction pipe 8 and the liquid extraction pipe 27. Vertically arranged collection inner sliding pipes 31 are slidably installed inside the collection boxes 30. The two collection inner sliding pipes 31 correspond to the positions of the exhaust holes 202 and the liquid discharge holes 205 respectively. The collection inner sliding pipes 31 are all adapted to the gas-liquid discharge holes 401. Vertically arranged collection end electric push rods 32 are fixedly installed on the side walls of the collection boxes 30. The telescopic ends of the two collection end electric push rods 32 are fixedly connected to the side walls of the two collection inner sliding pipes 31 respectively. Specifically, by setting the sealed collection assembly, when the filter frame 4 slides into the air filtration chamber 10 or the flushing chamber 11, the two collection end electric push rods 32 will synchronously drive the two collection inner sliding pipes 31 to move upward and respectively insert into the exhaust holes 202 and the liquid discharge holes 205. One of the collection end electric push rods 32 will synchronously insert into the gas-liquid discharge hole 401 at the bottom of the filter frame 4, so that the air extraction pipe 8 or the liquid extraction pipe 27 is docked with the filter frame 4, facilitating the discharge of gas or the mixed solvent, and at the same time limiting the position of the filter frame 4. After the air filtration or flushing is completed, the collection end electric push rod 32 drives the collection inner sliding pipe 31 to reset, releasing the limit, so that the filter frame 4 can continue to slide.

[0036] As Figure 8 shown, airtight rubber sleeves 33 are fixedly sleeved on the collection inner sliding pipes 31. The two airtight rubber sleeves 33 are respectively slidably installed inside the exhaust holes 202 and the liquid discharge holes 205. Specifically, by setting the airtight rubber sleeves 33, when the collection inner sliding pipes 31 are driven by the collection end electric push rods 32 to move up and down in the exhaust holes 202 or the liquid discharge holes 205, the two airtight rubber sleeves 33 always contact the inner walls of the exhaust holes 202 or the liquid discharge holes 205 respectively, thereby improving the sealing performance of the exhaust holes 202 and the liquid discharge holes 205 and preventing the gas inside the air filtration chamber 10 and the liquid inside the flushing chamber 11 from leaking.

[0037] As Figure 7As shown, one end of the tee-shaped intake pipe 7 away from the recycling box 2 is provided with an in-furnace gas pipe 19. In this embodiment, one end of the in-furnace gas pipe 19 is fixedly connected to the reflow soldering furnace and extends into the interior of the reflow soldering furnace. An intake inner sliding pipe 18 is slidably installed inside the end of the tee-shaped intake pipe 7 away from the recycling box 2. One end of the intake inner sliding pipe 18 is fixedly connected to one end of the in-furnace gas pipe 19. An hanging telescopic pipe 20 is slidably installed inside the bottom end of the in-furnace gas pipe 19. A suction disc 21 is fixedly installed at the bottom end of the hanging telescopic pipe 20. A vertically arranged hanging electric push rod 22 is fixedly installed at the bottom end of the in-furnace gas pipe 19. The telescopic end of the hanging electric push rod 22 is fixedly connected to the suction disc 21. Specifically, by providing the suction disc 21, when the circuit board inside the reflow soldering furnace is conveyed by the track to the bottom of the suction disc 21, the hanging electric push rod 22 will drive the hanging telescopic pipe 20 to slide down, so that the hanging telescopic pipe 20 covers above the circuit board. At this time, the recycling device starts to pump air from the inside of the reflow soldering furnace, so that the gas around the circuit board together with the rosin particles is pumped out, thereby extracting the area with the highest content of rosin particles. When the extraction is over, the suction disc 21 moves up and resets to avoid hindering the transmission of the circuit board.

[0038] As Figure 7 shown, second sliding strips 16 are fixedly installed at the bottoms of the telescopic boxes 12. As Figure 1 shown, two second linear guide rails 17 are fixedly installed at the top of the U-shaped table 1. The two second sliding strips 16 are respectively slidably installed on the two second linear guide rails 17. Specifically, by providing the second sliding strips 16 and the second linear guide rails 17, when the folded filter cotton 6 needs to be replaced, the intake end electric push rod 15 drives the butt joint gas pipe 13 to reset and release the limit, and then the entire sealed intake assembly can be pushed to one side along the second linear guide rail 17 to misalign the telescopic box 12 with the intake hole 201. At this time, the staff can replace the folded filter cotton 6 inside the filter frame 4 through the open intake hole 201.

[0039] In summary: when the solder flux recovery device for the reflow soldering furnace is in use, one end of the three-way air inlet pipe 7 is connected to the inside of the reflow soldering furnace. During the reflow soldering process of the circuit board, the sealed collection component connected to the gas treatment equipment will suck the gas in the cooling zone through the recovery box 2 and the three-way air inlet pipe 7, so that the rosin particles diffused around the circuit board and the gas are transported to the filter chamber 10 inside the recovery box 2 together with the gas, and enter the filter frame 4 from both sides, so that the rosin particles in the gas are cooled and deposited in the filter chamber 10, and are adsorbed and filtered by the folded filter cotton 6, so that the gas with the particles removed is transported to the gas treatment equipment through the gas-liquid discharge hole 401 for treatment and recovery, thereby realizing the recovery of the rosin particles. At the same time, after the folded filter cotton 6 has been used for a long time, the flushing The washing and recycling component will send the filter frame 4 into the flushing chamber 11, and the rosin solvent conveying device will convey the rosin solvent into the flushing chamber 11 to flush the folded filter cotton 6, so that the rosin particles accumulated inside the folded filter cotton 6 will be dissolved and conveyed to the liquid suction device and the storage device through the gas-liquid discharge hole 401 for temporary storage, so as to prepare for subsequent purification and recovery, thereby realizing the automatic separation and recovery of rosin. By setting a sealed air intake component, when it is necessary to filter the rosin particles, the air intake end electric push rods 15 on both sides of the recovery box 2 will respectively drive the two docking air pipes 13 to slide into the air intake holes 201 on both sides of the air filter chamber 10, and plug with the two sides of the filter frame 4. At this time, the two airtight rubber rings 14 will cover the joint for sealing, and then the rosin particles mixed therein will be The gas will be transported to the two sides of the filter frame 4 through the two ends of the three-way air intake pipe 7 and the two sets of telescopic boxes 12 and the docking air pipe 13, thereby being adsorbed and filtered by the folded filter cotton 6. The sealed air intake component can ensure the sealing during the air intake process and transport the gas to the inside of the folded filter cotton 6 from both sides, ensuring the adsorption contact area and improving the adsorption efficiency. At the same time, when the folded filter cotton 6 needs to be flushed, the docking air pipe 13 can be contracted and reset, thereby releasing the limit on the filter frame 4 and facilitating the filter frame 4 to move toward the inside of the flushing chamber 11. By setting a flushing recovery component, after the folded filter cotton 6 has been adsorbed for a long time, the sealed air intake component is reset and the limit on the filter frame 4 is released. At this time, the transposition electric push rod 26 drives the filter frame 4 to slide along the first linear guide rail 3 to After the filter frame 4 is in the flushing chamber 11 and positioned, the rosin solvent delivery device delivers the rosin solvent to the two jet disks 24 through the three-way solvent pipe 23, so that the solvent is sprayed to the inside of the folded filter cotton 6 through the jet disks 24 on both sides, so that most of the rosin particles deposited in the folded filter cotton 6 are dissolved by the solvent and then discharged through the gas-liquid discharge hole 401, so as to realize the recovery of the rosin particles and extend the single use cycle of the folded filter cotton 6. After the folded filter cotton 6 is dried, the flushing recovery component drives the folded filter cotton 6 to reset and restart the air filtering. By setting the airtight sealing disc 29, when the filter frame 4 slides and changes position in the air filtering chamber 10 and the flushing chamber 11, the two airtight sealing discs 29 will alternately cover one side of the partition 9, thereby sealing the gap of the make way hole 901.Improve the sealing performance between the air filtration chamber 10 and the flushing chamber 11 during the air filtration and flushing processes. By setting up a sealing collection assembly, when the filter frame 4 slides into the air filtration chamber 10 or the flushing chamber 11, the two collection end electric push rods 32 will synchronously drive the two collection inner sliding tubes 31 to move upward and respectively insert into the exhaust holes 202 and the liquid discharge holes 205. One of the collection end electric push rods 32 will synchronously insert into the gas-liquid discharge hole 401 at the bottom of the filter frame 4, enabling the air extraction pipe 8 or the liquid extraction pipe 27 to be docked with the filter frame 4, facilitating the discharge of gas or the mixed solvent, and at the same time limiting the position of the filter frame 4. When the air filtration or flushing is completed, the collection end electric push rod 32 drives the collection inner sliding tube 31 to reset, releasing the limit, so that the filter frame 4 can continue to slide. By setting up airtight rubber sleeves 33, when the collection inner sliding tube 31 is driven by the collection end electric push rod 32 to move up and down in the exhaust hole 202 or the liquid discharge hole 205, the two airtight rubber sleeves 33 always contact the inner walls of the exhaust hole 202 or the liquid discharge hole 205 respectively, thereby improving the sealing performance of the exhaust hole 202 and the liquid discharge hole 205 and preventing the leakage of gas inside the air filtration chamber 10 and the liquid inside the flushing chamber 11. By setting up the air extraction disc 21, when the circuit board inside the reflow soldering furnace is transported by the track to the bottom of the air extraction disc 21, the hanging electric push rod 22 will drive the hanging telescopic tube 20 to slide down, so that the hanging telescopic tube 20 covers above the circuit board. At this time, this recovery device starts to extract air from inside the reflow soldering furnace, and the gas around the circuit board together with the rosin particles is extracted, thereby extracting the area with the highest content of rosin particles. When the extraction is completed, the air extraction disc 21 moves up and resets to avoid hindering the transmission of the circuit board. By setting up the second slide bar 16 and the second linear guide rail 17, when the folded filter cotton 6 needs to be replaced, the air inlet end electric push rod 15 drives the docking air pipe 13 to reset and release the limit, and then the entire sealed air inlet assembly can be pushed to one side along the second linear guide rail 17 to misalign the telescopic box 12 with the air inlet hole 201. At this time, the staff can replace the folded filter cotton 6 inside the filter frame 4 through the open air inlet hole 201.,

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A flux recovery device for a reflow soldering furnace, characterized in that, The invention comprises a U-shaped platform (1), a recovery box (2) is fixedly installed on the top of the U-shaped platform (1), a first linear guide rail (3) is fixedly installed inside the recovery box (2), a filter frame (4) is placed on the top of the first linear guide rail (3), a first slide bar (5) adapted to the first linear guide rail (3) is fixedly installed on the bottom of the filter frame (4), a folded filter cotton (6) is fixedly installed inside the filter frame (4), a gas-liquid discharge hole (401) is provided at the bottom of the filter frame (4), a vertical partition (9) is fixedly installed inside the recovery box (2), a filter chamber (10) and a flushing chamber (11) are respectively provided on both sides of the partition (9), and air inlet holes are provided on the inner walls on both sides of the filter chamber (10). Hole (201), the two air inlet holes (201) are respectively located on both sides of the folded filter cotton (6), a three-way air inlet pipe (7) is arranged on the top of the recovery box (2), the two bottom ends of the three-way air inlet pipe (7) are respectively connected to the two air inlet holes (201), the two bottom ends of the three-way air inlet pipe (7) are both provided with a sealed air inlet assembly capable of sealing the bottom end of the three-way air inlet pipe (7) with the filter frame (4), a flushing recovery assembly capable of delivering the filter frame (4) into the flushing chamber (11) and flushing the folded filter cotton (6), and a sealed collection assembly for collecting filtered gas and liquid is arranged at the bottom of the recovery box (2).

2. The flux recovery device for a reflow soldering furnace according to claim 1, wherein The sealed air intake assembly comprises two telescopic boxes (12) respectively fixedly mounted on the two bottom ends of the three-way air intake pipe (7); a butt air pipe (13) is slidably mounted inside the two telescopic boxes (12); the two butt air pipes (13) are respectively matched with the two air intake holes (201); a horizontally arranged air intake end electric push rod (15) is fixedly mounted on the top of the telescopic box (12); the telescopic ends of the two air intake end electric push rods (15) are respectively fixedly connected to the side walls of the two butt air pipes (13); an airtight rubber ring (14) is fixedly sleeved on the two butt air pipes (13); a clearance hole (901) is provided on the side wall of the partition (9); and an exhaust hole (202) corresponding to the position of the gas-liquid exhaust hole (401) is provided at the bottom of the air filter chamber (10).

3. The flux recovery device for a reflow soldering furnace according to claim 2, characterized in that, The flushing recovery assembly comprises two assembly holes (203) respectively opened on the inner walls of both sides of the flushing chamber (11), and the interiors of the two assembly holes (203) are fixedly installed with a jet disk (24). The top of the recovery box (2) is provided with a three-way solvent pipe (23), and the two bottom ends of the three-way solvent pipe (23) are respectively fixedly connected to the two jet disks (24). The first linear guide rail (3) passes through the clearance hole (901) and extends to the interior of the flushing chamber (11). A power box (25) is fixedly mounted on one side of the recovery box (2), a horizontally arranged transposition electric push rod (26) is fixedly mounted inside the power box (25), a through hole (204) is provided on the inner wall of the air filter chamber (10), a telescopic end of the transposition electric push rod (26) passes through the through hole (204) and is fixedly connected to the filter frame (4), and a liquid discharge hole (205) corresponding to the position of the gas-liquid discharge hole (401) is provided at the bottom of the flushing chamber (11).

4. A flux recovery device for a reflow soldering furnace according to claim 3, wherein, Connecting blocks (28) are fixedly mounted on both sides of the filter frame (4), and airtight sealing discs (29) are provided on both sides of the filter frame (4). The two airtight sealing discs (29) are fixedly connected to the filter frame (4) via the connecting blocks (28). The bottom of the airtight sealing discs (29) is provided with limiting sliding holes (2901) that are compatible with the first linear guide rail (3). The telescopic end of the transposition electric push rod (26) is fixedly mounted on the side wall of one of the airtight sealing discs (29). The two airtight sealing discs (29) are respectively located inside the air filter chamber (10) and the flushing chamber (11).

5. A flux recovery device for a reflow soldering furnace according to claim 3, characterized in that, The sealed collection assembly comprises an air extraction pipe (8) and a liquid extraction pipe (27) arranged at the bottom of the recovery box (2); the top ends of the air extraction pipe (8) and the liquid extraction pipe (27) are fixedly mounted with a collection box (30); the interior of the collection box (30) is slidably mounted with a vertically mounted collection inner sliding pipe (31); the two collection inner sliding pipes (31) respectively correspond to the positions of the air exhaust hole (202) and the liquid discharge hole (205); the collection inner sliding pipes (31) are matched with the gas-liquid discharge hole (401); the side walls of the collection box (30) are fixedly mounted with vertically mounted collection end electric push rods (32); the telescopic ends of the two collection end electric push rods (32) are respectively fixedly connected to the side walls of the two collection inner sliding pipes (31).

6. The flux recovery device for a reflow soldering furnace according to claim 5, characterized in that, The collecting inner sliding tube (31) is fixedly sleeved with an airtight rubber sleeve (33), and the two airtight rubber sleeves (33) are slidably mounted inside the exhaust hole (202) and the liquid discharge hole (205), respectively.

7. A flux recovery device for a reflow soldering furnace according to claim 1, characterized in that, One end of the three-way intake pipe (7) away from the recovery box (2) is provided with an in-furnace gas pipe (19). An intake inner sliding pipe (18) is slidably installed inside one end of the three-way intake pipe (7) away from the recovery box (2). One end of the intake inner sliding pipe (18) is fixedly connected to one end of the in-furnace gas pipe (19). A hanging telescopic pipe (20) is slidably installed inside the bottom end of the in-furnace gas pipe (19). A suction disc (21) is fixedly installed at the bottom end of the hanging telescopic pipe (20). A vertically arranged hanging electric push rod (22) is fixedly installed at the bottom end of the in-furnace gas pipe (19). The telescopic end of the hanging electric push rod (22) is fixedly connected to the suction disc (21).

8. The flux recovery device for a reflow soldering furnace according to claim 2, characterized in that, Second sliding strips (16) are fixedly installed at the bottom of the telescopic box (12). Two second linear guide rails (17) are fixedly installed at the top of the U-shaped platform (1). The two second sliding strips (16) are respectively slidably installed on the two second linear guide rails (17).

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