Reflow soldering device with waste gas treatment mechanism

Abstract

The utility model relates to a reflow soldering device with a waste gas treatment mechanism, which belongs to the technical field of reflow soldering devices with waste gas treatment mechanisms, and comprises a box body, a heating bin is fixed on the top surface of the box body, and a conveying belt mechanism which horizontally penetrates through the box body and extends to the left side and the right side of the box body is arranged in the box body; a supporting plate is fixed between the front inner wall and the rear inner wall of the box body, a welding mechanism is arranged on the box body, and a circulating filtering mechanism is arranged on the box body; the welding mechanism comprises two air cylinders fixed to the inner top wall of the box body, a welding bin is fixed to the bottom ends of output shafts of the two air cylinders, and an inductive probe is fixed to the inner top wall of the welding bin. According to the reflow soldering device with the waste gas treatment mechanism, the PCB is covered with the welding bin, the situation that smoke dust waste gas generated during welding is blown out of the box body and influences the environment of a machining workshop is effectively avoided, the smoke dust waste gas containing heat flows circularly and is filtered and purified through the circulating filtering mechanism, and the practicability of the device is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a reflow soldering device with a waste gas treatment mechanism, in particular to a reflow soldering device with a waste gas treatment mechanism. Background Art

[0002] Reflow soldering technology is widely used in the field of electronic manufacturing. The components on the PCB circuit board are soldered by this process. There is a heating circuit inside the reflow soldering equipment, which heats the air or nitrogen to a high enough temperature and blows it toward the PCB circuit board with the components attached, so that the solder on both sides of the components melts and bonds with the main board. The advantage of this process is that the temperature is easy to control, oxidation can be avoided during the soldering process, and the manufacturing cost is easier to control.

[0003] For example, a Chinese patent (publication number: CN215393021 U) discloses a lead-free reflow soldering machine for PCB circuit boards, including a support plate and a support mechanism. A soldering box is fixedly connected to the upper surface of the support plate, a heating machine is fixedly connected to the upper surface of the soldering box, a telescopic hose is fixedly connected to the output end of the heating machine, a shunt pipe is fixedly connected to the end of the telescopic hose away from the heating machine, a first hot air head is fixedly connected to the side surface of the shunt pipe, a return air fan is fixedly connected to the lower surface of the support plate, a shunt pipe, an auxiliary frame, and a half gear are provided, and the first hot air head is rotated to speed up the soldering of the circuit board and improve the soldering rate. A return air fan, a first hot air head and a second hot air head are provided to enable the gas in the soldering box to achieve internal circulation, which is beneficial to efficient resource utilization and improves the practicality of the device.

[0004] However, the above search patent still has some shortcomings. When it is used, it is not convenient to purify and filter the smoke and exhaust gas generated during welding, which causes the smoke and exhaust gas to easily float out of the welding box and affect the environment of the processing workshop. It is inconvenient to use. Therefore, a reflow soldering device with an exhaust gas treatment mechanism is proposed to solve the above problem. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a reflow soldering device with an exhaust gas treatment mechanism, which has the advantages of being easy to recycle and treat welding fume exhaust gas and reducing environmental pollution. It solves the problem that the device disclosed in the above-mentioned search patent is not easy to recycle and treat welding fume exhaust gas when in use, and is easy to pollute the environment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reflow soldering device with an exhaust gas treatment mechanism, comprising a box body, a heating bin is fixed on the top surface of the box body, and a conveyor belt mechanism is arranged in the box body, which horizontally penetrates the box body and extends to the left and right sides thereof;

[0007] A support plate is fixed between the front and rear inner walls of the box body, a welding mechanism is provided on the box body, and a circulation filtering mechanism is provided on the box body;

[0008] The welding mechanism includes two cylinders fixed on the top wall of the box body, a welding bin is fixed at the bottom end of the two cylinder output shafts, an induction probe is fixed on the inner top wall of the welding bin, a fan whose air inlet end is connected to the heating bin is fixed on the top surface of the box body, an air supply pipe is fixed on the air outlet end of the fan, a diversion bin whose bottom surface is fixed to the top surface of the welding bin is fixed at the bottom end of the air supply pipe, and multiple air outlet pipes are fixed on the inner top wall of the welding bin.

[0009] Furthermore, the circulation filtering mechanism includes two partitions fixed between the front and rear inner walls of the welding bin, a reflux hole is provided on the right side of the partition, a filter bin is fixed on the top surface of the heating bin, a reflux pipe with one end connected to the filter bin is fixed on the top surface of the welding bin, an air inlet hole is provided on the top surface of the heating bin, and a filter assembly is provided in the filter bin.

[0010] Furthermore, the filter assembly includes a top plate installed on the top surface of the filter bin, the bottom surface of the top plate is rotatably connected to a screw, and a plurality of activated carbon plates distributed up and down are threadedly connected to the outer peripheral wall of the screw, a filter screen is placed on the top surface of the heating bin, and a positioning hole for the screw to be inserted is opened on the top surface of the filter screen, and a guide rod is fixed to the bottom surface of the top plate, which vertically penetrates the plurality of activated carbon plates and is inserted into the top surface of the filter screen.

[0011] Furthermore, rectangular holes for the conveyor belt mechanism to pass through are opened on the left and right sides of the box body, and two material guide plates facing each other front and back are fixed on the left side of the box body. The support plate passes through the conveyor belt mechanism front and back and is slidably connected to the inner wall of the conveyor belt of the conveyor belt mechanism.

[0012] Furthermore, a movable hole for the cylinder output shaft to pass through is opened on the top surface of the box body, the bottom surface of the welding bin is open, and the plurality of air outlet pipes are evenly distributed in a rectangular array, and the top end of the air outlet pipe is connected to the inside of the diversion bin.

[0013] Furthermore, the two partitions are distributed on the left and right and divide the welding chamber into three spaces on the left and right, and the two return pipes are connected to the left and right spaces respectively. The return pipe and the air supply pipe are both corrugated hoses, and an annular rubber pad is fixed on the bottom surface of the welding chamber.

[0014] Furthermore, the top plate is connected to the filter bin by bolts, and the two form a detachable structure. A disassembly hole is provided on the top surface of the filter bin, and a threaded hole for a screw to pass through and match with the screw is provided on the top surface of the activated carbon plate near the left side. A guide hole for a guide rod to pass through and be slidably connected with the screw is provided on the top surface of the activated carbon plate.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. When the reflow soldering device with the waste gas treatment mechanism is in use, the PCB board is placed on the conveyor belt mechanism and conveyed to the right into the box body. The PCB board is covered by the provided welding bin in cooperation with the support plate, and then the heating bin sends heat to the inside of the welding bin through the welding mechanism for welding. The welding bin can effectively prevent the smoke and waste gas generated during welding from floating out of the box body and affecting the processing workshop environment. The practicability is better and it is easier to promote and use.

[0017] 2. The reflow soldering device with the exhaust gas treatment mechanism generates negative pressure inside the heating chamber when the welding mechanism delivers heat for welding, so that the reflux pipe provided by the circulating filter mechanism can absorb the smoke and exhaust gas containing heat inside the welding chamber into the filter chamber, which is purified and filtered by the filter component and then transported to the heating chamber, thereby reducing heat loss and purifying the smoke and exhaust gas, thereby further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view schematic diagram of the utility model;

[0019] Figure 2 It is a front cross-sectional schematic diagram of the box body of the utility model;

[0020] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the filter bin of the utility model.

[0021] In the figure: 1 box body, 2 heating chamber, 3 conveyor belt mechanism, 4 support plate, 501 cylinder, 502 welding chamber, 503 induction probe, 504 fan, 505 air supply pipe, 506 diversion chamber, 507 air outlet pipe, 601 partition, 602 return hole, 603 filter chamber, 604 return pipe, 605 air inlet hole, 606 top plate, 607 screw, 608 activated carbon plate, 609 filter screen, 610 positioning hole, 611 guide rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-2In this embodiment, a reflow soldering device with an exhaust gas treatment mechanism comprises a box body 1, a heating chamber 2 is fixed on the top surface of the box body 1, a conveyor belt mechanism 3 is arranged in the box body 1, which horizontally penetrates the box body 1 and extends to the left and right sides thereof, a support plate 4 is fixed between the front and rear inner walls of the box body 1, and rectangular holes for the conveyor belt mechanism 3 to penetrate are opened on the left and right sides of the box body 1, two guide plates facing each other front and back are fixed on the left side of the box body 1, the support plate 4 penetrates the conveyor belt mechanism 3 front and back, and is slidably connected with the inner wall of the conveyor belt of the conveyor belt mechanism 3, a welding mechanism is arranged on the box body 1, and a circulating filtering mechanism is arranged on the box body 1. When in use, the PCB The board is placed on the conveyor belt mechanism 3 and conveyed to the right into the box body 1. The PCB board can be directly covered by the set welding mechanism, and then the heating chamber 2 is welded by sending heat through the welding mechanism, which can effectively prevent the smoke and exhaust gas generated during welding from floating out of the box body 1 and affecting the processing workshop environment. It is more practical and easier to promote and use. When the welding mechanism sends heat for welding, a negative pressure is generated inside the heating chamber 2, so that the circulating filtering mechanism can circulate the smoke and exhaust gas containing heat and purify and filter it, and then it is transported to the heating chamber 2 after purification and filtration, so as to reduce heat loss and purify the smoke and exhaust gas at the same time, thereby further improving the practicality of the device.

[0024] It should be noted that a temperature control mechanism with adjustable temperature is provided inside the heating bin 2. The temperature control mechanism and the conveyor belt mechanism 3 are both mature and public technologies in the prior art. Therefore, their specific structure and working principle will not be described in detail. In addition, the control method of the present application is controlled by a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present application is mainly used to protect mechanical devices, so the present application will not explain the control method and circuit connection in detail.

[0025] See also Figure 1-2The welding mechanism includes two cylinders 501 fixed on the inner top wall of the box body 1. The bottom ends of the output shafts of the two cylinders 501 are fixed with welding bins 502. The inner top wall of the welding bins 502 is fixed with induction probes 503. When in use, the PCB board is placed on the conveyor belt mechanism 3 and conveyed to the right inside the box body 1. When the induction probe 503 detects the PCB board, the conveyor belt mechanism 3 stops conveying, and the cylinders 501 extend at the same time. The cylinders 501 push the welding bins 502 downward and cooperate with the support plate 4 to cover the PCB board. The top surface of the box body 1 is fixed with a fan 504 connected with the air inlet end of the heating bin 2. The fan 504 An air supply pipe 505 is fixed to the air outlet end, and a diversion bin 506 whose bottom surface is fixed to the top surface of the welding bin 502 is fixed to the bottom end of the air supply pipe 505. A plurality of air outlet pipes 507 are fixed to the inner top wall of the welding bin 502. Further, the fan 504 is started, and the fan 504 transports the hot air inside the heating bin 2 to the diversion bin 506 through the air supply pipe 505, and then the plurality of air outlet pipes 507 at the bottom of the diversion bin 506 blow the hot air evenly onto the PCB board to melt the solder and complete the welding. After heating and welding for a certain period of time, the cylinder 501 is automatically retracted, the fan 504 automatically stops, and the conveyor belt mechanism 3 resumes operation and the above operation is repeated.

[0026] The top surface of the box body 1 is provided with a movable hole through which the output shaft of the air cylinder 501 passes. The bottom surface of the welding chamber 502 is open. A plurality of air outlet pipes 507 are evenly distributed in a rectangular array. The top end of the air outlet pipe 507 is connected to the inside of the diversion chamber 506.

[0027] See also Figure 2-3 In this embodiment, the circulation filtering mechanism includes two partitions 601 fixed between the front and rear inner walls of the welding chamber 502, and a reflux hole 602 is provided on the right side of the partition 601. A filter chamber 603 is fixed on the top surface of the heating chamber 2, and a reflux pipe 604 with one end connected to the filter chamber 603 is fixed on the top surface of the welding chamber 502. An air inlet hole 605 is provided on the top surface of the heating chamber 2, and a filter component is provided in the filter chamber 603. When the welding chamber 502 covers the PCB board for welding, the smoke and exhaust gas generated during welding is covered by the welding chamber 502 and cannot be dispersed outward. When the fan 504 is started, hot air will be continuously transported to the welding chamber 502, so that the smoke and exhaust gas inside the welding chamber 502 flows to both sides through the reflux hole 602, and further flows back into the filter chamber 603 through the reflux pipe 604, and enters the heating chamber 2 from the air inlet hole 605 for circulation after being filtered by the filter component inside the filter chamber 603, which is beneficial to reduce heat loss.

[0028] The two partitions 601 are distributed on the left and right and divide the welding chamber 502 into three spaces on the left and right, and the two return pipes 604 are connected to the left and right spaces respectively. The return pipe 604 and the air supply pipe 505 are both corrugated hoses, and an annular rubber pad is fixed to the bottom surface of the welding chamber 502.

[0029] See also Figure 2-3 In this embodiment, the filter assembly includes a top plate 606 installed on the top surface of the filter bin 603, and the top plate 606 is connected to the filter bin 603 by bolts, and the two form a detachable structure. The bottom surface of the top plate 606 is rotatably connected with a screw rod 607, and a plurality of activated carbon plates 608 distributed up and down are threadedly connected on the outer peripheral wall of the screw rod 607. A filter screen 609 is placed on the top surface of the heating bin 2. When the smoke and exhaust gas enters the filter bin 603, the smoke and exhaust gas is purified and filtered by the activated carbon plates 608 and the filter screen 609. The top surface of the filter screen 609 is provided with a positioning hole 610 for the screw rod 607 to be inserted. The bottom surface of the top plate 606 is fixed with a guide rod 611 that vertically penetrates the plurality of activated carbon plates 608 and is inserted into the top surface of the filter screen 609. The top surface of the filter bin 603 is provided with a disassembly hole, and the activated carbon plates 608 are provided with a positioning hole 610 for the screw rod 607 to be inserted. A threaded hole for the screw 607 to pass through and match with is provided on the top surface and near the left side. A guide hole for the guide rod 611 to pass through and be slidably connected with is provided on the top surface of the activated carbon plate 608. When the filter bin 603 needs to be cleaned, the top plate 606 is removed to separate it from the filter bin 603 and the activated carbon plate 608 is taken away from the filter bin 603. At this time, the bottom end of the screw 607 and the bottom end of the guide rod 611 are separated from the filter screen 609, the filter screen 609 can be taken out for cleaning, and then the screw 607 can be rotated to remove the activated carbon plate 608 for replacement. When replacing, the guide rod 611 is passed through the activated carbon plate 608, and then the screw 607 is rotated to move the activated carbon plate 608 up along the guide rod 611. The screw 607 can be used to space a distance between multiple activated carbon plates 608, which is beneficial for the activated carbon plates 608 to adsorb smoke and exhaust gas.

[0030] The working principle of the above embodiment is:

[0031] (1) When in use, the PCB board is placed on the conveyor belt mechanism 3 and conveyed to the right into the box body 1. When the sensor probe 503 detects the PCB board, the conveyor belt mechanism 3 stops conveying, and the cylinder 501 extends at the same time. The cylinder 501 pushes the welding chamber 502 downward, and cooperates with the support plate 4 to cover the PCB board. Further, the fan 504 is started, and the fan 504 conveys the hot air inside the heating chamber 2 to the diversion chamber 506 through the air supply pipe 505. Then, the multiple air outlet pipes 507 at the bottom of the diversion chamber 506 blow evenly on the PCB board to melt the solder to complete the welding. After heating and welding for a certain period of time, the cylinder 501 is automatically retracted, the fan 504 automatically stops, and the conveyor belt mechanism 3 resumes operation and repeats the above operation.

[0032] (2) When the welding chamber 502 covers the PCB board for welding, the smoke and exhaust gas generated during welding is covered by the welding chamber 502 and cannot drift outward. When the fan 504 is started, it will continuously deliver hot air to the welding chamber 502, so that the smoke and exhaust gas inside the welding chamber 502 flows to both sides through the reflow hole 602, and further flows back into the filter chamber 603 through the reflow pipe 604. After being filtered by the filter component inside the filter chamber 603, it enters the heating chamber 2 from the air inlet hole 605 for circulation, which is beneficial to reduce heat loss.

[0033] (3) When the smoke and dust exhaust gas enters the filter chamber 603, the activated carbon plate 608 is provided to cooperate with the filter screen 609 to purify and filter the smoke and dust exhaust gas. When the filter chamber 603 needs to be cleaned, the top plate 606 is removed to separate it from the filter chamber 603 and the activated carbon plate 608 is taken away from the filter chamber 603. At this time, the bottom end of the screw 607 and the bottom end of the guide rod 611 are separated from the filter screen 609, and the filter screen 609 can be taken out for cleaning. Then, the screw 607 is rotated to remove the activated carbon plate 608 for replacement. When replacing, the guide rod 611 is passed through the activated carbon plate 608, and then the screw 607 is rotated to move the activated carbon plate 608 upward along the guide rod 611. The screw 607 can be used to space a distance between multiple activated carbon plates 608, which is beneficial for the activated carbon plates 608 to adsorb smoke and dust exhaust gas.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reflow soldering device with an exhaust gas treatment mechanism, comprising a box body (1), a heating chamber (2) being fixed on the top surface of the box body (1), and a conveyor belt mechanism (3) being arranged inside the box body (1) and horizontally penetrating the box body (1) and extending to the left and right sides thereof; Features: A support plate (4) is fixed between the front and rear inner walls of the box body (1), a welding mechanism is provided on the box body (1), and a circulation filtering mechanism is provided on the box body (1); The welding mechanism comprises two cylinders (501) fixed on the inner top wall of the box body (1); a welding bin (502) is fixed to the bottom ends of the output shafts of the two cylinders (501); a sensing probe (503) is fixed to the inner top wall of the welding bin (502); a fan (504) whose air inlet end is connected to the heating bin (2) is fixed to the top surface of the box body (1); an air supply pipe (505) is fixed to the air outlet end of the fan (504); a diversion bin (506) whose bottom surface is fixed to the top surface of the welding bin (502) is fixed to the bottom end of the air supply pipe (505); and a plurality of air outlet pipes (507) are fixed to the inner top wall of the welding bin (502).

2. A reflow soldering device with an exhaust gas treatment mechanism according to claim 1, characterized in that: The circulation filtering mechanism comprises two partitions (601) fixed between the front and rear inner walls of the welding bin (502); a return hole (602) is provided on the right side of the partition (601); a filter bin (603) is fixed on the top surface of the heating bin (2); a return pipe (604) having one end connected to the filter bin (603) is fixed on the top surface of the welding bin (502); an air inlet hole (605) is provided on the top surface of the heating bin (2); and a filter assembly is provided in the filter bin (603).

3. A reflow soldering device with an exhaust gas treatment mechanism according to claim 2, characterized in that: The filter assembly comprises a top plate (606) mounted on the top surface of the filter bin (603); the bottom surface of the top plate (606) is rotatably connected to a screw rod (607); a plurality of activated carbon plates (608) distributed vertically are threadedly connected to the outer peripheral wall of the screw rod (607); a filter screen (609) is placed on the top surface of the heating bin (2); a positioning hole (610) for inserting the screw rod (607) is provided on the top surface of the filter screen (609); a guide rod (611) vertically penetrating the plurality of activated carbon plates (608) and inserted into the top surface of the filter screen (609) is fixed to the bottom surface of the top plate (606).

4. A reflow soldering device with an exhaust gas treatment mechanism according to claim 1, characterized in that: The left and right sides of the box body (1) are provided with rectangular holes for the conveyor belt mechanism (3) to pass through. Two guide plates facing each other front and back are fixed on the left side of the box body (1). The support plate (4) passes through the conveyor belt mechanism (3) front and back and is slidably connected to the inner wall of the conveyor belt of the conveyor belt mechanism (3).

5. A reflow soldering device with an exhaust gas treatment mechanism according to claim 1, characterized in that: The top surface of the box body (1) is provided with a movable hole through which the output shaft of the air cylinder (501) passes, the bottom surface of the welding chamber (502) is open, and the plurality of air outlet pipes (507) are evenly distributed in a rectangular array, and the top end of the air outlet pipe (507) is connected to the inside of the diversion chamber (506).

6. A reflow soldering device with an exhaust gas treatment mechanism according to claim 3, characterized in that: The two partitions (601) are distributed on the left and right and divide the welding chamber (502) into three spaces on the left and right, and the two return pipes (604) are respectively connected to the spaces on the left and right sides, and the return pipe (604) and the air supply pipe (505) are both corrugated hoses, and an annular rubber pad is fixed to the bottom surface of the welding chamber (502).

7. A reflow soldering device with an exhaust gas treatment mechanism according to claim 3, characterized in that: The top plate (606) is connected to the filter chamber (603) by bolts, and the two form a detachable structure. The top surface of the filter chamber (603) is provided with a disassembly hole, and the top surface of the activated carbon plate (608) and near the left side are provided with a threaded hole for the screw rod (607) to pass through and match with it. The top surface of the activated carbon plate (608) is provided with a guide hole for the guide rod (611) to pass through and be slidably connected with it.

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