Lead-tin alloy recycling and crushing device

Abstract

The invention discloses a lead-tin alloy recycling and crushing device, and particularly relates to the technical field of lead-tin alloy recycling, the lead-tin alloy recycling and crushing device comprises a crushing box, a drying box is fixedly mounted at the lower part of the right end of the crushing box, and a feeding hopper is fixedly mounted at the top of the crushing box; a first crushing roller assembly, a second crushing roller assembly, a screening device and a sorting device are sequentially installed in the crushing box from top to bottom. According to the lead-tin alloy recycling and crushing device, the first crushing roller assembly, the second crushing roller assembly, the screening device and the backflow device are arranged to be matched with one another, waste can be crushed more uniformly, the situation that subsequent separation is affected due to the fact that plastic and alloy are not separated thoroughly is avoided, the plastic and the alloy are separated through the arranged sorting device, and the recycling efficiency of the lead-tin alloy is improved. And the scraping device can scrape off the lead-tin alloy dried on the conveying belt, and the situation that the lead-tin alloy is attached to the belt, consequently, the lead-tin alloy is not collected thoroughly, and losses are caused is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of lead-tin alloy recovery, and in particular to a lead-tin alloy recovery and crushing device. Background Art

[0002] Lead-tin alloy refers to lead-based or tin-based bearing alloys. Lead-based bearing alloys are collectively called Babbitt alloys. Different lead and tin content in lead-tin alloys will make the alloy have different melting points and different properties. Because the standard electrode potential of lead and tin is very small, it is widely used in the electroplating industry. By changing the ratio of lead and tin in the alloy, different effects can be achieved, such as anti-corrosion coatings, wear-resistant coatings, corrosion-resistant welding, etc. The most valuable lead-tin alloy waste is the electronic circuit board. Lead-tin is a metal solder commonly used in the welding process of early circuit board components and substrates. The recovery rate is low, causing serious environmental pollution and economic losses.

[0003] In the existing recycling process of lead-tin alloy in circuit boards, the circuit boards are usually refined by calcining. Since the circuit boards contain a large number of plastic parts, a large amount of harmful gases will be generated during calcination. Therefore, we provide a crushing device to crush and sort the circuit boards first, separate the plastic and lead-tin alloy, and avoid the subsequent calcination to produce a large amount of toxic gases. Summary of the invention

[0004] The main purpose of the present invention is to provide a lead-tin alloy recovery and crushing device, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A lead-tin alloy recycling and crushing device comprises a crushing box, a drying box is fixedly installed at the lower right end of the crushing box, a feeding funnel is fixedly installed on the top of the crushing box, a first crushing roller assembly, a second crushing roller assembly, a screening device and a sorting device are sequentially installed inside the crushing box from top to bottom, a first inclined plate inclined downward is fixedly installed on both sides of the inner wall of the crushing box between the first crushing roller assembly and the second crushing roller assembly, an opening between the two first inclined plates is located directly above the second crushing roller assembly, a first feeding funnel and a second feeding funnel distributed up and down are fixedly installed on the inner wall of the crushing box, the first feeding funnel is located between the second crushing roller assembly and the screening device, the second feeding funnel is located below the screening device, and the second feeding funnel is located below the screening device. The bottom of the discharge funnel is tilted to the left and a first discharge pipe is fixedly installed. A return device is fixedly installed on the upper right end of the crushing box, and the return device is connected to the screening device. A vertical plate is installed in the middle of the inner wall of the drying box, and the vertical plate divides the drying box into a water storage chamber on the left and a drying chamber on the right. A conveyor belt is fixedly installed in the drying box, and a movable opening is opened in the middle of the vertical plate. The conveyor belt passes through the movable opening, and a drying device is installed on the conveyor belt. The crushing box is located on both sides of the first crushing roller assembly and the second crushing roller assembly. The sealing cover is fixedly installed on the inner wall, and the sealing cover and the inner wall of the crushing box form a cooling chamber. A cooling coil is placed in the cooling chamber, and a surface of the sealing cover is provided with a crushing opening that is connected to the first crushing roller assembly and the second crushing roller assembly. The teeth of the cooling groove match each other, the crushing teeth spacing of the first crushing roller assembly is greater than the crushing teeth spacing of the second crushing roller assembly, the first crushing roller assembly is above the second crushing roller assembly and the projection is vertical, a water pump is fixedly installed on the left side of the bottom wall of the inner cavity of the drying box, and a first delivery pipe is fixedly installed on the output end of the water pump, the first delivery pipe runs through the drying box and is fixedly installed with a coil, and a second delivery pipe is fixedly installed on the other end of the coil, and a heat dissipation fin is fixedly installed on the outside of the coil, and the cooling water is dissipated and cooled by the heat dissipation fin, and the cooled water flow is transported to the cooling coil to cool the crushing teeth, so as to avoid the crushing teeth from being heated by friction for a long time. When the circuit board is crushed, the plastic is softened by heat and adheres to the crushing roller, affecting the crushing effect , one end of the second conveying pipe away from the coil is connected to the upper cooling coil, the upper cooling coil and the lower cooling coil are connected by a connecting pipe, and the lower cooling coil is fixedly installed with a return pipe, and the outlet of the return pipe is located above the water storage funnel, and a scraper assembly and a discharge plate that cooperate with the conveyor belt are fixedly installed on the right wall of the crushing box, and the discharge plate is located below the scraper assembly, and a collecting box is arranged below the discharge plate, and a drain plate with a left end tilted downward is fixedly installed on the right side of the inner wall of the drying box, and the left end of the drain plate is arranged through an active opening, and the drain plate is located below the conveyor belt. The drain plate collects the water filtered from the conveyor belt and transports it to the water storage cavity on the left to prevent water from dripping into the collection tank and affecting the drying of the lead-tin alloy.

[0007] Preferably, the screening device includes a cylinder body, which is fixedly mounted on the inner wall of the crushing box, a feed port is provided on the top of the cylinder body, the top of the feed port is connected to the bottom discharge end of the first discharge funnel, a discharge port is provided on the lower right side of the outer surface of the cylinder body, and a screening hole is provided on the outer surface of the cylinder body located on the left side of the discharge port, a third discharge pipe inclined downward is fixedly mounted outside the discharge port, a rotating rod is rotatably connected to the middle part of the cylinder body, a rotating drum is fixedly mounted outside the rotating rod, a plurality of partition plates are evenly fixedly mounted on the outer surface of the rotating drum, one end of the partition plate away from the rotating drum is slidably connected to the inner wall of the cylinder, the partition plate drives the waste to rotate in the cylinder, and when the waste passes through the screening hole, the suitable waste falls into the second collecting funnel below, and the unsuitable waste is transported to the third discharge pipe through the discharge port.

[0008] Preferably, the return material device includes a return material barrel, which is installed on the right side of the crushing box, a first motor is fixedly installed on the top of the return material barrel, a rotating shaft is rotatably connected inside the return material barrel, a spiral plate is fixedly installed on the outer surface of the rotating shaft, and a second discharge pipe inclined to the lower right is fixedly installed on the top of the outer surface of the return material barrel, the outlet of the second discharge pipe is located above the feed funnel, the output end of the first motor is fixedly connected to the rotating shaft, and the third discharge pipe is connected to the inside of the return material barrel. The return material device transports unqualified waste from the top to the crushing box for re-crushing to avoid incomplete separation of plastics and alloys due to excessively large particles.

[0009] Preferably, the sorting device includes a hair dryer, a water storage funnel and a spiral conveying mechanism, the water storage funnel is fixedly installed on the lower part of the bottom wall of the crushing box, a feeding pipe is fixedly installed on the bottom of the water storage funnel, the spiral conveying mechanism is fixedly installed on the bottom wall of the inner cavity of the crushing box, the right end of the spiral conveying mechanism is inclined upward and extends through the drying box, and a fourth discharge pipe is fixedly installed on the right side of the bottom of the spiral conveying mechanism, the fourth discharge pipe is located on the right side of the upper end of the conveying belt, the feeding pipe is connected with the feeding end of the spiral conveying mechanism, the hair dryer is fixedly installed on the left wall of the crushing box, and the hair dryer is located below the first discharge pipe. The waste material is blown away by the hair dryer to improve the separation effect of plastics and alloys, the plastic particles float above the liquid surface, and the alloy particles sink to the bottom of the water storage funnel, and then the alloy is discharged through the fourth discharge pipe by the spiral conveying mechanism and onto the conveying belt.

[0010] Preferably, a second buffer plate is fixedly installed at the bottom of the fourth feeding tube, a plurality of buffer holes are opened in the middle of the second buffer plate, and downwardly inclined first buffer plates are fixedly installed on the left and right sides of the inner wall of the fourth feeding tube, and the first buffer plates on both sides are spaced apart from each other. The second buffer plate and the first buffer plate buffer the falling water flow to prevent the water flow from falling directly onto the belt and causing excessive impact force, thereby causing the water flow to splash and separate from the belt, resulting in incomplete collection of the alloy.

[0011] Preferably, the drying device includes an air intake pipe, an electric heating plate and an electric heating pipe, the air intake pipe is fixedly installed on the right side of the top wall of the drying box, the top of the air intake pipe passes through the drying box and is fixedly installed with an exhaust fan, the electric heating pipe and the electric heating plate are fixedly installed on the inner wall of the crushing box, the electric heating pipe is located above the conveyor belt, the electric heating plate is located on the right side inside the conveyor belt, an air intake funnel is fixedly installed on the bottom of the air intake pipe, the air intake funnel is located on the right side above the conveyor belt, the lead-tin alloy is dried by the drying device, and the exhaust fan extracts the water vapor generated by the drying to avoid excessive water vapor in the drying box and affect the drying efficiency.

[0012] Preferably, the scraper assembly includes a horizontal plate, which is fixedly mounted on the upper right wall of the drying box, a slide groove is provided on the left side of the upper end of the horizontal plate, a collection port is provided on the right side of the upper end of the horizontal plate, a slide rod is fixedly mounted in the slide groove, a slider is slidably mounted on the outer surface of the slider, a spring is sleeved on the right side of the slider, a triangular plate is fixedly mounted on the top of the slider, a scraper is fixedly mounted on the upper inclined surface of the triangular plate, the left end of the scraper extends to the left and is in close contact with the surface of the conveyor belt, a vertical rod is fixedly mounted on the bottom of the scraper, a brush is fixedly mounted on the left end of the vertical rod, and the bristles of the brush are in contact with the lower surface of the conveyor belt. The lead-tin alloy on the belt is scraped off by the scraper device to avoid sticking to the belt and causing recovery loss of the lead-tin alloy.

[0013] Preferably, the top wall of the movable opening is provided with a plurality of fixed scrapers to scrape the alloy on the belt flat and evenly to avoid accumulation and affect the drying effect.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention discloses a lead-tin alloy recycling and crushing device, wherein a sealing cover, a water pump, a first conveying pipe, a coil, a heat dissipation fin, and a second conveying pipe cooperate with each other to cool the crushing teeth of the crushing roller, thereby avoiding the frictional heating caused by long-term crushing. When the circuit board is crushed, the plastic is softened by heat and adheres to the crushing teeth, thus affecting the crushing effect.

[0016] 2. The present invention discloses a lead-tin alloy recycling and crushing device, which is provided with a first crushing roller assembly, a second crushing roller assembly, a screening device, and a reflux device, which cooperate with each other, and can crush the waste more evenly, avoiding incomplete separation of plastic and alloy, which affects the subsequent separation;

[0017] 3. The present invention discloses a lead-tin alloy recovery and crushing device, which is provided with a sorting device, a drying device and a scraping device. The sorting device separates plastic and alloy to avoid affecting the subsequent calcination of alloy waste and producing a large amount of harmful gas. At the same time, the drying device dries the sorted lead-tin alloy. At the same time, the scraping device can scrape the dried lead-tin alloy on the conveyor belt to avoid adhesion to the belt, resulting in incomplete collection of the lead-tin alloy and loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of the present invention;

[0019] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0020] Figure 3 It is a cutaway schematic diagram of the present invention;

[0021] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0022] Figure 5 It is a schematic structural diagram of the scraping device of the present invention.

[0023] In the figure: 1. crushing box; 2. drying box; 3. feeding funnel; 4. first crushing roller assembly; 5. second crushing roller assembly; 6. return device; 7. screening device; 8. sorting device; 9. drying device; 10. conveying belt; 11. collecting box; 12. first inclined plate; 13. sealing cover; 14. first discharge hopper; 15. scraper assembly; 16. water pump; 17. first conveying pipe; 18. coil; 19. cooling fin; 20. second conveying pipe; 21. connecting pipe; 22. return pipe; 23. second discharge hopper; 24. first discharge pipe; 26. discharge plate; 27. drainage plate; 61. return barrel; 62. rotating shaft; 63. spiral plate; 64. first motor; 65. second discharge pipe; 71 , cylinder; 72, rotating rod; 73, rotating drum; 74, partition plate; 75, screening hole; 76, discharge port; 77, third discharge pipe; 78, feed port; 81, hair dryer; 82, water storage funnel; 83, feeding pipe; 84, spiral conveying mechanism; 86, fourth discharge pipe; 87, first buffer plate; 88, second buffer plate; 89, buffer hole; 91, exhaust fan; 92, suction pipe; 93, suction funnel; 94, electric heating plate; 95, electric heating pipe; 28, vertical plate; 281, movable port; 151, horizontal plate; 152, slider; 153, slide rod; 154, spring; 155, triangular plate; 156, vertical rod; 157, brush; 158, scraper; 1511, collecting port; 1512, slide chute. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] Embodiment 1

[0026] like Figure 1-5As shown, a lead-tin alloy recycling and crushing device comprises a crushing box 1, a drying box 2 is fixedly installed at the lower right end of the crushing box 1, a feeding funnel 3 is fixedly installed on the top of the crushing box 1, and a first crushing roller assembly 4, a second crushing roller assembly 5, a screening device 7 and a sorting device 8 are sequentially installed inside the crushing box 1 from top to bottom. The first crushing roller assembly 4 and the second crushing roller assembly 5 adopt commonly used crushing equipment, which is the prior art and will not be elaborated here. The left and right sides of the inner wall of the crushing box 1 between the first crushing roller assembly 4 and the second crushing roller assembly 5 are fixedly installed with downwardly inclined first inclined plates 12, and the opening between the two first inclined plates 12 is located directly above the second crushing roller assembly 5. The inner wall of the crushing box 1 is fixedly installed with a first feeding funnel 14 and a second feeding funnel 14 distributed up and down. A feeding hopper 23, a first feeding hopper 14 is located between the second crushing roller assembly 5 and the screening device 7, a second feeding hopper 23 is located below the screening device 7, a bottom of the second feeding hopper 23 is tilted to the left and a first feeding pipe 24 is fixedly installed, a return device 6 is fixedly installed on the upper right end of the crushing box 1, the return device 6 is connected to the screening device 7, a vertical plate 28 is installed in the middle of the inner wall of the drying box 2, the vertical plate 28 divides the inside of the drying box 2 into a water storage chamber and a drying chamber (not numbered in the figure) distributed on the left and right, a conveying belt 10 is fixedly installed in the drying box 2, a movable opening 281 is opened in the middle of the vertical plate 28, the conveying belt 10 passes through the movable opening 281, the conveying belt 10 is composed of a belt and a belt support frame, which is a prior art and will not be elaborated here, the belt is It is made of flexible material with filtering function. A drying device 9 is installed on the conveying belt 10. The crushing box 1 is located on the inner walls of both sides of the first crushing roller assembly 4 and the second crushing roller assembly 5. A sealing cover 13 is fixedly installed. The sealing cover 13 and the inner wall of the crushing box 1 form a cooling chamber. A cooling coil is folded and placed in the cooling chamber. The sealing cover 13 is made of metal material with fast heat exchange speed. A cooling groove that matches the crushing teeth of the first crushing roller assembly 4 and the second crushing roller assembly 5 is opened on the surface of the sealing cover 13. When the crushing teeth are in contact with the cooling groove, the crushing teeth are cooled. The crushing tooth spacing of the first crushing roller assembly 4 is greater than the crushing tooth spacing of the second crushing roller assembly 5. The first crushing roller assembly 4 is above the second crushing roller assembly 5 and the projection is vertical. Double crushing can crush waste materials The drying box 2 is more uniform. A water pump 16 is fixedly installed on the left side of the bottom wall of the inner cavity of the drying box 2. A first conveying pipe 17 is fixedly installed on the output end of the water pump 16. The first conveying pipe 17 runs through the drying box 2 and is fixedly installed with a coil 18. A second conveying pipe 20 is fixedly installed on the other end of the coil 18. A heat dissipation fin 19 is fixedly installed on the outside of the coil 18. The end of the second conveying pipe 20 away from the coil 18 is connected to the upper cooling coil. The upper cooling coil and the lower cooling coil are connected by a connecting pipe 21. A return pipe 22 is fixedly installed on the lower cooling coil. The outlet of the return pipe 22 is located above the water storage funnel 82. A scraper assembly 15 and a blanking plate 26 that cooperate with the conveyor belt 10 are fixedly installed on the right wall of the crushing box 1. The blanking plate 26 is located below the scraper assembly 15.A collecting box 11 is provided below the unloading plate 26. A drainage plate 27 with its left end tilted downward is fixedly installed on the right side of the inner wall of the drying box 2. The left end of the drainage plate 27 is provided with a movable opening 281. The drainage plate 27 is located below the conveyor belt 10. The water pump 16 conveys the water in the water storage chamber to the coil 18 through the first conveying pipe 17. During the process of the cooling water in the coil 18, the heat dissipation fins 19 dissipate heat and cool the cooling water in the coil 18. The cooled water is conveyed to the second conveying pipe 20, and then to the upper cooling coil. The cooling coil absorbs the heat of the sealing cover 13 and cools the crushing teeth in the cooling tank. The water that has absorbed the heat is conveyed to the sorting device 8, and water is used as the sorting medium for plastics and alloys.

[0027] During specific use, the circuit board is placed into the crushing box 1 from the feed funnel 3, and then double-crushed by the first crushing roller assembly 4 and the second crushing roller assembly 5. The crushed waste falls into the screening device 7 for screening, and waste particles of appropriate size are collected in the second discharge funnel 23. Unsuitable waste is transported to the return device 6, and the unsuitable waste is re-transported to the feed port 78 through the return device 6 for re-crushing. Qualified waste falls into the sorting device 8, and the lead-tin alloy is separated by the sorting device 8 and transported to the conveyor belt 10, and then the waste is dried by the drying device 9. The scraper assembly 15 scrapes the lead-tin alloy on the conveyor belt 10, and then collects it into the collecting box 11 through the discharge plate 26, thereby completing the recovery of the lead-tin alloy in the circuit board.

[0028] Embodiment 2

[0029] The screening device 7 includes a cylinder 71 and a second motor, the second motor is installed outside the crushing box 1, the cylinder 71 is fixedly installed on the inner wall of the crushing box 1, a feed port 78 is provided at the top of the cylinder 71, and the top of the feed port 78 is connected to the bottom discharge end of the first discharge funnel 14, a discharge port 76 is provided on the lower right side of the outer surface of the cylinder 71, and a screening hole 75 is provided on the outer surface of the cylinder 71 on the left side of the discharge port 76, and a third discharge pipe 77 inclined downward is fixedly installed outside the discharge port 76, a rotating rod 72 is rotatably connected to the middle part of the cylinder 71, and a rotating drum 73 is fixedly installed outside the rotating rod 72, and a plurality of partition plates 74 are evenly fixedly installed on the outer surface of the rotating drum 73, and the end of the partition plate 74 away from the rotating drum 73 is slidably connected to the inner wall of the cylinder 71, and when the partition plate 74 moves to the discharge port 76, it is in a downwardly inclined state, and the waste on the partition plate 74 falls into the third discharge pipe 77 through the discharge port 76.

[0030] The second motor drives the rotating rod 72 to rotate, the rotating rod 72 drives the rotating drum 73 to rotate, and the rotating drum 73 drives the partition plate 74 to rotate. The crushed waste is transported to the cylinder 71 through the feed port 78, and the partition plate 74 drives the waste to move in the cylinder 71. The screening holes 75 on the surface of the cylinder 71 screen the waste, and suitable waste is collected in the second discharge funnel 23. Unsuitable waste is transported to the third discharge pipe 77 through the discharge port 76, and then transported to the return device 6 through the third discharge pipe 77.

[0031] Embodiment 3

[0032] The return material device 6 includes a return material cylinder 61, which is installed on the right side of the crushing box 1. A first motor 64 is fixedly installed on the top of the return material cylinder 61. A rotating shaft 62 is rotatably connected inside the return material cylinder 61. A spiral plate 63 is fixedly installed on the outer surface of the rotating shaft 62. A second discharge pipe 65 inclined to the lower right is fixedly installed on the top of the outer surface of the return material cylinder 61. The outlet of the second discharge pipe 65 is located above the feed funnel 3. The output end of the first motor 64 is fixedly connected to the rotating shaft 62, and the third discharge pipe 77 is connected to the inside of the return material cylinder 61.

[0033] When in use, the third discharge pipe 77 transports unqualified waste materials to the return tube 61, the first motor 64 drives the rotating shaft 62 to rotate, the rotating shaft 62 drives the spiral plate 63 to rotate, and drives the waste materials on the lower side to move upward, and then transported from the second discharge pipe 65 to the feed funnel 3, and crushed again by the first crushing roller assembly 4 and the second crushing roller assembly 5.

[0034] Embodiment 4

[0035] The sorting device 8 includes a blower 81, a water storage funnel 82 and a spiral conveying mechanism 84. The water storage funnel 82 is fixedly installed at the lower part of the bottom wall of the crushing box 1. A feeding pipe 83 is fixedly installed at the bottom of the water storage funnel 82. The spiral conveying mechanism 84 is fixedly installed on the bottom wall of the inner cavity of the crushing box 1. The right end of the spiral conveying mechanism 84 is tilted upward and extends through the drying box 2. A fourth discharge pipe 86 is fixedly installed on the right side of the bottom of the spiral conveying mechanism 84. The fourth discharge pipe 86 is located on the right side of the upper end of the conveying belt 10. The feeding pipe 83 is connected to the feeding end of the spiral conveying mechanism 84. The hair dryer 81 is fixedly installed on the left wall of the crushing box 1, and the hair dryer 81 is located below the first discharge pipe 24. The waste collected in the second discharge funnel 23 is discharged through the first discharge pipe 24. Water is stored in the water storage funnel 82. The hair dryer 81 blows the waste to the liquid surface in the water storage funnel 82. The plastic floats on the water surface and the alloy falls to the bottom of the water storage funnel 82, thereby separating the plastic and the alloy. Then, the lead-tin alloy is transported to the screw conveying mechanism 84 through the feeding pipe 83, and the screw conveying mechanism 84 transports the alloy to the fourth discharge pipe 86.

[0036] Furthermore, when the spiral conveying mechanism 84 conveys the lead-tin alloy, it will discharge the water flow from the fourth discharge pipe. In order to avoid excessive impact force of the falling water flow, which may cause the water flow containing the lead-tin alloy to splash, resulting in waste of the lead-tin alloy and incomplete collection, a second buffer plate 88 is fixedly installed at the bottom of the fourth discharge pipe 86. A plurality of buffer holes 89 are opened in the middle of the second buffer plate 88. The buffer holes 89 buffer the water flow to avoid the water flow directly impacting the surface of the conveyor belt 10 and causing water flow splashing. At the same time, downwardly inclined first buffer plates 87 are fixedly installed on the left and right sides of the inner wall of the fourth discharge pipe 86. The first buffer plates 87 on both sides are spaced apart from each other. The water flow moves back and forth on the first buffer plates 87 on both sides, reducing the impact force of the fall, further slowing down the impact force of the water flow, improving the completeness of alloy collection, and avoiding waste.

[0037] Embodiment 5

[0038] The drying device 9 includes an air intake pipe 92, an electric heating plate 94 and an electric heating pipe 95. The air intake pipe 92 is fixedly installed on the right side of the top wall of the drying box 2. The top of the air intake pipe 92 passes through the drying box 2 and is fixedly installed with an exhaust fan 91. The electric heating pipe 95 and the electric heating plate 94 are fixedly installed on the inner wall of the crushing box 1. The electric heating pipe 95 is located above the conveyor belt 10, and the electric heating plate 94 is located on the right side inside the conveyor belt 10. An air intake funnel 93 is fixedly installed at the bottom of the air intake pipe 92. The air intake funnel 93 is located on the right side above the conveyor belt 10. When in use, the electric heating pipe 95 and the electric heating plate 94 dry the alloy on the belt, and the water vapor generated by the drying is sucked to the outside through the exhaust fan 91 to avoid excessive water vapor in the drying box 2 and affect the drying effect.

[0039] Furthermore, a plurality of scrapers are fixedly installed on the top wall of the movable opening 281. The lead-tin alloy on the belt is scraped flat and evenly by the scrapers to prevent the lead-tin alloy from being piled up together and affecting the drying efficiency of the lead-tin alloy.

[0040] Embodiment 6

[0041] The scraper assembly 15 includes a transverse plate 151, which is fixedly mounted on the upper right wall of the drying box 2. A chute 1512 is provided on the left side of the upper end of the transverse plate 151, and a collecting port 1511 is provided on the right side of the upper end of the transverse plate 151. A slide rod 153 is fixedly mounted in the chute 1512, and a slider 152 is slidably mounted on the outer surface of the slider 153. A spring 154 is sleeved on the right side of the slider 153. A triangular plate 155 is fixedly mounted on the top of the slider 152, and a scraper 158 is fixedly mounted on the upper inclined surface of the triangular plate 155. The left end of the scraper 158 extends to the left and is in close contact with the surface of the conveyor belt 10. The bottom of the scraper 158 is fixedly mounted. A vertical rod 156 is fixedly installed, and a brush 157 is fixedly installed on the left end of the vertical rod 156. The bristles of the brush 157 are in contact with the lower surface of the conveyor belt 10. During the rotation of the belt, the lead-tin alloy is driven to move. When it moves to the rightmost side, the scraper 158 scrapes the lead-tin alloy on the surface of the belt. The scraped lead-tin is collected in the collecting port 1511 of the collection funnel, and then falls onto the unloading plate 26 through the collecting port 1511, and then collected in the collecting box 11. At the same time, the brush 157 is set to clean the belt for a second time to avoid unclean cleaning of the lead-tin alloy, which causes a large loss of lead-tin alloy recovery.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lead-tin alloy recovery and crushing device, comprising a crushing box (1), characterized in that: A drying box (2) is fixedly installed at the lower right end of the crushing box (1), a feeding funnel (3) is fixedly installed at the top of the crushing box (1), a first crushing roller assembly (4), a second crushing roller assembly (5), a screening device (7) and a sorting device (8) are installed in the crushing box (1) from top to bottom, a return device (6) is fixedly installed at the upper right end of the crushing box (1), and the return device (6) and the screening device (7) are connected, a vertical plate (28) is installed in the middle of the inner wall of the drying box (2), a conveying belt (10) is fixedly installed in the drying box (2), and a movable opening (281) is opened in the middle of the vertical plate (28), and the A conveyor belt (10) is arranged to pass through the movable opening (281), and a drying device (9) is installed on the conveyor belt (10). The crushing box (1) is located on the inner walls of both sides of the first crushing roller assembly (4) and the second crushing roller assembly (5), and sealing covers (13) are fixedly installed. The sealing cover (13) and the inner wall of the crushing box (1) form a cooling cavity, and a cooling coil is placed in the cooling cavity. The surface of the sealing cover (13) is provided with a cooling groove that matches the crushing teeth of the first crushing roller assembly (4) and the second crushing roller assembly (5). The crushing tooth spacing of the first crushing roller assembly (4) is greater than the crushing tooth spacing of the second crushing roller assembly (5). A crushing roller assembly (4) is above the second crushing roller assembly (5) and the projection is vertical. A water pump (16) is fixedly installed on the left side of the bottom wall of the inner cavity of the drying box (2). A first delivery pipe (17) is fixedly installed at the output end of the water pump (16). The first delivery pipe (17) runs through the drying box (2) and is fixedly installed with a coil (18). A second delivery pipe (20) is fixedly installed at the other end of the coil (18). A heat dissipation fin (19) is fixedly installed outside the coil (18). The end of the second delivery pipe (20) away from the coil (18) is connected to the upper cooling coil. The upper cooling coil and the lower cooling coil are connected through a connecting pipe ( 21) is connected, a return pipe (22) is fixedly installed on the cooling coil at the lower part, and the outlet of the return pipe (22) is located above the water storage funnel (82); a scraper assembly (15) and a discharge plate (26) matched with the conveyor belt (10) are fixedly installed on the right wall of the crushing box (1), and the discharge plate (26) is located below the scraper assembly (15), and a collecting box (11) is arranged below the discharge plate (26); a drainage plate (27) with a downwardly inclined left end is fixedly installed on the right side of the inner wall of the drying box (2), and the left end of the drainage plate (27) passes through the movable opening (281), and the drainage plate (27) is located below the conveyor belt (10).

2. A lead-tin alloy recovery and crushing device according to claim 1, characterized in that: A first inclined plate (12) tilted downward is fixedly mounted on both sides of the inner wall of the crushing box (1) between the first crushing roller assembly (4) and the second crushing roller assembly (5), and the opening between the two first inclined plates (12) is located directly above the second crushing roller assembly (5).

3. The lead-tin alloy recovery and crushing device according to claim 1 is characterized in that: The inner wall of the crushing box (1) is fixedly mounted with a first discharge funnel (14) and a second discharge funnel (23) distributed vertically, wherein the first discharge funnel (14) is located between the second crushing roller assembly (5) and the screening device (7), and the second discharge funnel (23) is located below the screening device (7). The bottom of the second discharge funnel (23) is tilted to the left and is fixedly mounted with a first discharge pipe (24).

4. A lead-tin alloy recovery and crushing device according to claim 3, characterized in that: The screening device (7) comprises a cylinder (71), the cylinder (71) being fixedly mounted on the inner wall of the crushing box (1), a feed port (78) being provided at the top of the cylinder (71), the top of the feed port (78) being connected to the bottom discharge end of the first discharge hopper (14), a discharge port (76) being provided at the lower right side of the outer surface of the cylinder (71), a screening hole (75) being provided at the left side of the discharge port (76) on the outer surface of the cylinder (71), a third discharge pipe (77) being fixedly mounted downwardly on the outside of the discharge port (76), a rotating rod (72) being rotatably connected to the middle of the cylinder (71), a rotating drum (73) being fixedly mounted on the outside of the rotating rod (72), a plurality of partition plates (74) being evenly fixedly mounted on the outer surface of the rotating drum (73), the end of the partition plate (74) away from the rotating drum (73) being slidably connected to the inner wall of the cylinder (71).

5. A lead-tin alloy recovery and crushing device according to claim 4, characterized in that: The return material device (6) comprises a return material barrel (61), the return material barrel (61) is installed on the right side of the crushing box (1), a first motor (64) is fixedly installed on the top of the return material barrel (61), a rotating shaft (62) is rotatably connected inside the return material barrel (61), a spiral plate (63) is fixedly installed on the outer surface of the rotating shaft (62), a second discharge pipe (65) inclined to the lower right is fixedly installed on the top of the outer surface of the return material barrel (61), the outlet of the second discharge pipe (65) is located above the feed funnel (3), the output end of the first motor (64) is fixedly connected to the rotating shaft (62), and the third discharge pipe (77) is connected to the inside of the return material barrel (61).

6. A lead-tin alloy recovery and crushing device according to claim 4, characterized in that: The sorting device (8) comprises a blower (81), a water storage funnel (82) and a spiral conveying mechanism (84); the water storage funnel (82) is fixedly mounted on the lower part of the bottom wall of the crushing box (1); a feeding pipe (83) is fixedly mounted on the bottom of the water storage funnel (82); the spiral conveying mechanism (84) is fixedly mounted on the bottom wall of the inner cavity of the crushing box (1); the right end of the spiral conveying mechanism (84) is tilted upward and extends through the drying box (2); a fourth discharge pipe (86) is fixedly mounted on the right side of the bottom of the spiral conveying mechanism (84); the fourth discharge pipe (86) is located on the right side of the upper end of the conveying belt (10); the feeding pipe (83) is connected to the feeding end of the spiral conveying mechanism (84); the blower (81) is fixedly mounted on the left inner wall of the crushing box (1); and the blower (81) is located below the first discharge pipe (24).

7. A lead-tin alloy recovery and crushing device according to claim 6, characterized in that: A second buffer plate (88) is fixedly installed at the bottom of the fourth feed tube (86), and a plurality of buffer holes (89) are opened in the middle of the second buffer plate (88). A downwardly inclined first buffer plate (87) is fixedly installed on both sides of the inner wall of the fourth feed tube (86), and the first buffer plates (87) on both sides are spaced apart from each other.

8. The lead-tin alloy recovery and crushing device according to claim 1, characterized in that: The drying device (9) comprises an air intake pipe (92), an electric heating plate (94) and an electric heating pipe (95); the air intake pipe (92) is fixedly mounted on the right side of the top wall of the drying box (2); the top of the air intake pipe (92) passes through the drying box (2) and is fixedly mounted with an exhaust fan (91); the electric heating pipe (95) and the electric heating plate (94) are fixedly mounted on the inner wall of the crushing box (1); the electric heating pipe (95) is located above the conveyor belt (10); the electric heating plate (94) is located on the right side inside the conveyor belt (10); an air intake funnel (93) is fixedly mounted on the bottom of the air intake pipe (92); the air intake funnel (93) is located on the right side above the conveyor belt (10).

9. The lead-tin alloy recovery and crushing device according to claim 1, characterized in that: The scraper assembly (15) comprises a transverse plate (151), the transverse plate (151) is fixedly mounted on the upper right wall of the drying box (2), a slide groove (1512) is provided on the left side of the upper end of the transverse plate (151), a collecting port (1511) is provided on the right side of the upper end of the transverse plate (151), a slide rod (153) is fixedly mounted in the slide groove (1512), a slider (152) is slidably mounted on the outer surface of the slide rod (153), and a spring (1512) is sleeved on the right side of the slide rod (153). 54), a triangle plate (155) is fixedly mounted on the top of the slider (152), a scraper (158) is fixedly mounted on the upper inclined surface of the triangle plate (155), the left end of the scraper (158) extends to the left and is in close contact with the surface of the conveyor belt (10), a vertical rod (156) is fixedly mounted on the bottom of the scraper (158), a brush (157) is fixedly mounted on the left end of the vertical rod (156), and the bristles of the brush (157) are in contact with the lower surface of the conveyor belt (10).

10. The lead-tin alloy recovery and crushing device according to claim 1, characterized in that: The top wall of the movable opening (281) is provided with a plurality of scrapers fixedly mounted thereon.

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