Screw impurity separation device

Abstract

The invention relates to the technical field of magnetic separation, and particularly discloses a screw impurity separation device which comprises a conveyor, a conveying belt is arranged on the conveyor, a feeding mechanism comprises a magnet column and a feeding disc, the magnet column penetrates through the conveying belt in an up-down sliding mode, and the feeding disc is arranged below the conveying belt. The screws in the charging tray are adsorbed on the magnet columns; the arrangement mechanism comprises a first net plate, a second net plate and a second driving assembly, after the magnet columns attract the screws, the first driving assembly enables the first net plate to move downwards so that the screws can be scraped downwards, the axes of the screws can be kept vertical, then the second driving assembly enables the first net plate and the second net plate to be staggered in the horizontal direction, and therefore the edges of the upper net hole and the lower net hole abut against the screws. The iron removal mechanism is used for removing iron scraps on the surfaces of the screws adsorbed on the magnet columns by utilizing magnetic force; the effect of removing scrap iron on the surfaces of the screws can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic separation, and in particular to a screw impurity separation device. Background Art

[0002] Screws are usually made of steel wire or steel rod that are cut, straightened and surface treated to ensure that the quality and size meet the requirements. Then, through the cold heading process, the steel wire or steel rod is plastically deformed under the action of the mold to form the head and rod of the screw. Subsequently, thread processing is performed, that is, threads are formed on the rod. This step is usually completed using a thread rolling machine. However, iron filings are often generated during stamping and thread rolling. The iron filings will be mixed into the screws, which will cause iron filings to be mixed in during the packaging process. In the later process of using automated equipment to install the screws, the mixed iron filings can easily cause the automation to jam and lead to operational failures.

[0003] The Chinese patent document with the announcement number CN220092099U discloses a screw iron chip screening device, which includes a frame, an upper hopper, a vibrating trough and an iron chip guide trough. The upper hopper is located above the vibrating trough and supplies screws to the vibrating trough. The iron chip guide trough is located above the vibrating trough, and the outermost edge of the upper end opening of the iron chip guide trough is longer than the outer edge of the outlet of the vibrating trough in the horizontal direction. During screening, the upper hopper is filled with screws to be screened, and the outlet below the upper hopper can discharge the screws, supply the screws to the vibrating trough, and during the vibration of the vibrating trough, the screws are discharged. During the process, the screws in the vibrating trough are driven to move toward the outer edge of its outlet. The vibration of the vibrating trough causes the screws and iron chips to be separated into layers, with the iron chips located at the bottom layer. The weight of the screws is greater than that of the iron chips, which makes the screws discharged from the outer edge of the outlet slide farther than the distance the iron chips slide in the air. Therefore, by arranging the outermost edge of the upper opening of the iron chip guide trough to extend horizontally beyond the outer edge of the outlet of the vibrating trough, the iron chips with a shorter sliding distance fall into the entrance of the iron chip guide trough, while the screws slide to the outside of the outer edge of the entrance of the iron chip guide trough and finally fall into the screw collecting hopper.

[0004] In the above technical solution, when the screws and iron filings are loaded and unloaded from the vibrating screen, the relatively fine iron filings will adhere to the surface of the screws, thereby making it impossible to completely separate them. Summary of the invention

[0005] The present invention provides a screw impurity separation device, aiming to solve the problem in the related art that relatively fine iron filings adhere to the surface of the screw and thus cannot be completely separated.

[0006] A screw impurity separation device comprises a conveyor, a conveyor belt is arranged on the conveyor, and further comprises: The feeding mechanism includes a magnet column that slides up and down and passes through the conveyor belt, and a feeding tray that is arranged below the conveyor belt. When the magnet column passes through the feeding tray, the screws in the feeding tray are adsorbed on the magnet column; The arranging mechanism comprises a mesh plate 1 arranged on the conveyor belt, a mesh plate 2 installed at the lower end of the mesh plate, a driving component 1 for driving the mesh plate 1 to move up and down, and a driving component 2 for making the mesh plate 1 and the mesh plate 2 mutually displaced in the horizontal direction. In the initial state, the mesh holes on the mesh plate 1 and the mesh plate 2 are aligned one by one, and the magnet column can pass through the mesh hole. When the magnet column absorbs the screw, the driving component 1 makes the mesh plate 1 move downward, thereby scraping the screw downward, so that the axis of the screw remains vertical, and then the driving component 2 makes the mesh plate 1 and the mesh plate 2 mutually displaced in the horizontal direction, so that the edges of the upper and lower mesh holes abut against the screw, thereby positioning the screw; The iron removal mechanism is used to remove iron filings on the surface of the screw adsorbed on the magnet column by using magnetic force.

[0007] The effect is: by setting up a feeding mechanism and a sorting mechanism, the screws are adsorbed on the conveyor belt one by one and arranged neatly, and then an iron removal mechanism is set on the front and back sides of the screw to attract iron filings on the surface of the screw, thereby completing the separation of the screw and the iron filings.

[0008] Preferably, an elastic member is provided between the magnet column and the conveyor belt to enable the magnet column to move upward and reset. A feeding tray is provided below the conveyor belt, a limiting plate is provided above the feeding tray, and a slope 1 is provided on the right end face of the limiting plate. When the magnet column passes through the feeding tray, the magnet column is pressed downward by the slope 1 to attract the screw.

[0009] The effect is that the attraction of the magnet column to the screw is controlled by the limit plate.

[0010] Preferably, a collection box is provided on the left side of the feeding tray, and a horizontal plate extending to the top of the collection box is provided at the left end of the trapezoidal boss. The diameter of the magnet column is smaller than the diameter of the screw. When the magnet column passes the left end of the horizontal plate, the magnet column moves upward and resets under the action of the elastic part, and the screw is weakened by the attraction of the magnet column and falls downward into the collection box.

[0011] The effect is that the screws with the iron chips separated are sent into the collecting box.

[0012] Preferably, the driving component 1 includes a guide plate 1 installed on the conveyor, the bottom surface of the guide plate 1 is a horizontal plane, the right side surface is an inclined plane 2 in the up and down directions, and a pressure plate is provided on the mesh plate 1. When the screw is adsorbed on the magnet column and the magnet column moves to the left following the conveyor belt, the inclined plane 2 presses against the upper end of the pressure plate and causes the pressure plate to gradually move downward.

[0013] Preferably, the driving component 2 includes a guide plate 2 arranged on the conveyor, the rear end face of the guide plate 2 is a vertical face, the right side face is an inclined face 3 in the front-to-back direction, and a transmission component is arranged between the mesh plate 1 and the mesh plate 2. When the mesh plate 1 moves downward, the inclined face 3 presses against the front end of the pressure plate and causes the pressure plate to gradually move backward, and the mesh plate 1 moves the mesh plate 2 forward through the transmission component.

[0014] Preferably, the iron removal mechanism includes magnet plates arranged on the front and rear sides of the conveyor belt, and the screw is attracted by the magnet plates more than by the magnet column. When the screw adsorbed on the magnet column passes through the magnet plate, the iron filings on the surface of the screw are attracted by the magnet plate and adsorbed on the magnet plate.

[0015] The effect is that the magnet plate separates the iron filings on the surface of the screw from the screw.

[0016] Preferably, non-magnetic areas and magnetic areas are alternately arranged on the upper left-right direction of the magnet plate, a rack three is arranged on the upper left-right direction of the non-magnetic area, and a gear two that can mesh with the rack three is arranged on the upper end of the magnet column. When the magnet column passes through the non-magnetic area, the gear two meshes with the rack three.

[0017] Preferably, the left end of the magnet plate is a non-magnetic area, an iron filings box is provided on the left side of the magnet plate, and a scraper bar is also provided on the conveyor belt. When the scraper bar passes through the magnet plate, the iron filings on the magnet plate are scraped into the iron filings box.

[0018] The effect is to remove the iron filings on the magnet plate for easy recycling.

[0019] By adopting the above technical scheme, the beneficial effect of the present invention is as follows: by setting a feeding component and a sorting component, the screws are neatly arranged and adsorbed on the conveyor belt, and then a magnet plate is set on the side of the screws. When the screws are passed from the side of the magnet plate, the iron filings on the surface of the screws are sucked away by magnetic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the conveyor belt of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the mounting plate 1 and the mounting plate 2 of the present invention.

[0023] Figure 4 It is a schematic diagram of the structural decomposition of the tidying mechanism of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the limiting plate of the present invention.

[0025] Figure 6It is a structural schematic diagram of the telescopic rod of the present invention.

[0026] Figure 7 It is a structural schematic diagram of a magnet plate 1 of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the screw of the present invention.

[0028] Reference numerals: 1. Conveyor; 11. Conveyor belt; 2. Feeding mechanism; 21. Mounting plate 1; 22. Magnet column; 23. Limiting plate; 24. Inclined surface 1; 25. Compression spring; 26. Feeding tray; 27. Gear 2; 3. Sorting mechanism; 31. Mounting plate 2; 32. Screen plate 1; 33. Screen plate 2; 34. Limiting hole; 35. Guide plate 1; 36. Guide plate 2; 37. Telescopic rod; 38. Gear 1; 39. Rack 1; 310. Rack 2; 311. Pressure plate; 4. Iron removal mechanism; 41. Magnet plate 1; 42. Magnet plate 2; 43. Rack 3; 5. Collecting box; 6. Cleaning mechanism; 61. Iron chip box 1; 62. Iron chip box 2; 63. Magnet plate 3; 64. Scraper rod. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 , Figure 2 As shown, a screw impurity separation device of the present invention includes a conveyor 1, a feeding mechanism 2, a sorting mechanism 3, an iron removal mechanism 4, a collecting mechanism and a cleaning mechanism 6. The right side below the conveyor 1 is a feeding place, and the left side below is a feeding place. The conveyor 1 is used to transport the screws from the feeding place to the feeding place. A plurality of conveyor belts 11 are arranged on the conveyor 1 at equal intervals along the front and rear directions. The feeding mechanism 2 is used to place the screws to be removed from the feeding place on the conveyor belt 11. The sorting mechanism 3 is arranged on the conveyor belt 11, and is used to keep the axis of the screw vertical and adjust the position of the screw on the conveyor belt 11. The iron removal mechanism 4 is used to remove iron filings on the surface of the screw by magnetic force. The collecting mechanism is used to collect the screws separated from the conveyor belt 11. The cleaning mechanism 6 is used to remove the iron filings on the iron removal mechanism 4.

[0031] like Figure 1-Figure 5As shown, the feeding mechanism 2 includes a plurality of mounting plates 21, a plurality of magnet columns 22, a feeding tray 26 and a limiting plate 23. The mounting plates 21 are fixedly mounted on the outer ring surface of the conveyor belt 11, and a plurality of mounting plates 21 are mounted on the outer ring surface of the same conveyor belt 11. A circular boss 1 is mounted on the top of the magnet column 22. A channel running through the mounting plates 21 is provided, and the channel is thick at the top and thin at the bottom. The magnet column 22 is slidably mounted in the thin channel up and down, and a compression spring 25 is passed through the magnet column 22. The upper end of the compression spring 25 is fixedly connected to the circular boss 1, and the lower end is fixedly connected to the step surface between the two ends of the channel. The feeding tray 26 is arranged at the lower right side of the conveyor belt 11, and the limiting plate 23 is arranged between the upper and lower inner surfaces of the conveyor belt 11. The front and rear ends of the limiting plate 23 are fixedly mounted on the conveyor 1, and the right end of the limiting plate 23 is provided with The inclined surface 24 is inclined downward from right to left, and a through hole coaxial with the channel is opened on the conveyor belt 11, which is used to allow the magnet column 22 to pass through the conveyor belt 11 and abut against the limit plate 23. When the magnet column 22 on the conveyor belt 11 passes through the inclined surface 24, the top end of the magnet column 22 is pressed downward by the inclined surface 24. When the circular boss 1 is pressed on the lower surface of the limit plate 23, the lower end surface of the magnet column 22 exceeds the lower surface of the mounting plate 21 downward. When the magnet column 22 passes above the feeding tray 26, the telescopic bracket arranged below the feeding tray 26 pushes the feeding tray 26 upward, so that the lower end of the magnet column 22 can contact the screw in the feeding tray 26, thereby attracting the screw and making the screw adsorbed on the magnet column 22. Since the diameter of the magnet column 22 is smaller than the diameter of the screw, only one screw can be adsorbed on the magnet column 22 at the same time.

[0032] like Figure 1-Figure 5As shown, the sorting mechanism 3 includes a plurality of mounting plates 2 31, a mesh plate 1 32, a mesh plate 2 33, a driving assembly 1, a driving assembly 2 and a transmission assembly. The two mounting plates 2 31 form a group and are fixedly mounted on the two conveyor belts 11 at the front end and the rear end respectively. The mesh plates 1 32 and the mesh plates 2 33 are each provided with a plurality of rectangular mesh holes that penetrate vertically. In an initial state, the rectangular mesh holes on the mesh plates 1 32 and the mesh plates 2 33 are aligned one by one up and down, so that the magnet column 22 can pass through the rectangular mesh holes. The mesh plates 1 32 and the mesh plates 2 33 are each provided with two limiting holes 34 that penetrate vertically, and the two limiting holes 34 on the mesh plates 1 32 and the mesh plates 2 33 are respectively located below the two mounting plates 2 31 of the same group. In an initial state, the limiting holes 34 on the mesh plates 1 32 and the mesh plates 2 33 are aligned one by one up and down. A telescopic rod 37 is installed on 1, and a tension spring (not shown in the figure) is installed in the telescopic rod 37. A circular boss 2 is installed at the lower end of the telescopic rod 37. The telescopic rod 37 passes through the limiting holes 34 on the mesh plate 1 32 and the mesh plate 2 33 on the same side at the same time. The circular boss 2 is located at the lower side of the mesh plate 2 33 and the circular boss 2 abuts against the mesh plate 2 33. When the circular boss 1 is pressed on the lower surface of the limiting plate 23, the driving component 1 drives the mesh plate 1 32 to move downward, and the edge of the mesh hole on the mesh plate 2 33 scrapes one end of the screw downward to keep the axis of the screw vertical. When the bottom surface of the mesh plate 2 33 is flush with the bottom surface of the screw, the driving component 2 drives the mesh plate 1 32 to move backward, and the mesh plate 1 32 drives the mesh plate 2 33 to move forward through the transmission component, so that the edges of the upper and lower mesh holes abut against the screw, thereby positioning the screw.

[0033] like Figure 3-Figure 5 As shown, the driving component 1 includes two guide plates 135 installed on the conveyor 1, and the two guide plates 135 are respectively located at the front and rear sides of the two conveyor belts 11 at the front and rear ends. The bottom surface of the guide plate 135 is a horizontal plane, and the right side surface is a slope 2 with a lower left side and a higher right side. Vertical pressure plates 311 are fixedly installed on the front and rear end surfaces of the mesh plate 132. When the circular boss 1 is pressed on the lower surface of the limit plate 23, the top end of the pressure plate 311 abuts against the slope 2. As the mounting plate 23 moves to the left, the pressure plate 311 gradually moves downward under the pressure of the slope 2, so that the edge of the mesh hole on the mesh plate 23 scrapes one end of the screw downward, thereby keeping the axis of the screw vertical, and then the upper end surface of the pressure plate 311 abuts against the bottom surface of the guide plate 135.

[0034] like Figure 3-Figure 6As shown, the driving component 2 includes a guide plate 2 36 installed at the lower end of the front guide plate 1 35, the guide plate 2 36 is horizontally arranged, the rear end face of the guide plate 2 36 is a vertical face, and the right side face is a slope 3 inclined backward from left to right. When the mesh plate 1 32 moves downward, the slope 3 is pressed against the front end of the pressure plate 311. As the mounting plate 2 31 moves to the left, the pressure plate 311 gradually moves backward under the pressure of the slope 3. At this time, the mesh plate 1 32 moves the mesh plate 2 33 forward through the transmission component, so that the edges of the upper and lower mesh holes abut against the screws, thereby positioning the screws, and then the front end face of the pressure plate 311 abuts against the vertical face of the guide plate 2 36.

[0035] like Figure 3-Figure 6 As shown, the transmission assembly includes gear 1 38, rack 1 39 and rack 2 310. Gear 1 38 is rotatably mounted on the telescopic rod 37, and a torsion spring (not shown in the figure) is installed between gear 1 38 and the telescopic rod 37 to reset gear 1 38. Rack 1 39 is fixedly installed on the upper surface of mesh plate 1 32, and rack 2 310 is fixedly installed on the lower surface of mesh plate 2 33. Rack 1 39 and rack 2 310 are meshed with gear 1 38 at the same time, and rack 1 39 and rack 2 310 are respectively located on the left and right sides of the gear. When mesh plate 1 32 moves backward, rack 1 39 drives gear 1 38 to rotate, and when gear 1 38 rotates, it drives rack 2 310 to move forward, thereby causing mesh plate 2 33 to move forward.

[0036] like Figure 1-Figure 8 As shown, the iron removal mechanism 4 includes a plurality of magnet plates 1 41 and a second magnet plate 42, a gap is provided between two adjacent conveyor belts 11, and the plurality of magnet plates 1 41 are respectively provided in the gap between the two adjacent conveyor belts 11, the upper end of the magnet plate 1 41 is fixedly mounted on a horizontal plate, the second magnet plate 42 is located below the plurality of conveyor belts 11 and is fixedly mounted on the ground, the magnet plates 1 41 and the second magnet plate 42 are alternately provided with magnetic areas and non-magnetic areas along the left and right directions, and the screws on the magnet column 22 are subjected to a greater attraction in the magnetic area than to the attraction of the magnet column 22, and the magnet plates 1 41 A rack three 43 is installed on the left and right sides of the non-magnetic area of ​​the front surface, and a gear two 27 that can mesh with the rack three 43 is installed on the upper end of the magnet column 22. When the screw adsorbed on the magnet column 22 passes through the magnetic area, the iron filings on the surface of the screw are attracted by the magnetic area and adsorbed on the magnetic area. When the magnet column 22 passes through the non-magnetic area, the gear two 27 meshes with the rack three 43. When the rack three 43 rolls to the left, the gear two 27 causes the magnet column 22 to drive the screw to rotate, so that the outer circumferential surface of the screw can face the magnetic area on the magnet plate one 41, and then the magnetic area can attract the iron filings on the surface of the screw.

[0037] like Figure 1-Figure 8As shown, the collecting mechanism includes a collection box 5, which is arranged on the left side of the magnet plate 2 42, and the limit plate 23, the guide plate 1 35 and the guide plate 2 36 all extend to the left to the top of the collection box 5. When the top of the magnet column 22 is detached from the horizontal plate, the compression spring 25 resets the magnet column 22 upward, so that the lower end of the magnet column 22 is upwardly retracted into the mounting plate 1 21. At this time, the pressure plate 311 first detaches from the vertical surface of the guide plate 2 36, and then detaches from the bottom surface of the guide plate 1 35. The mesh plate 1 32 and the mesh plate 2 33 are first reset in the horizontal direction under the action of the torsion spring, and then reset upward again under the action of the tension spring. Since the distance between the magnet column 22 and the screw becomes farther, the attraction of the magnet column 22 to the screw is reduced, and then the screw falls downward into the collection box 5 under the action of gravity.

[0038] like Figure 1-Figure 8 As shown, the cleaning mechanism 6 includes an iron chip box 1 61, an iron chip box 2 62, a magnet plate 3 63 and a plurality of scraper rods 64. The scraper rods 64 are in an "L" shape as a whole. The scraper rods 64 are installed on the outer surface of the conveyor belt 11. The front and rear sides of the scraper rods 64 are respectively in contact with the two adjacent magnet plates 1 41. The bottom end of the scraper rods 64 is in contact with the upper surface of the magnet plate 2 42. The iron chip box 1 61 is located between the magnet plate 2 42 and the aggregate box 5. The left ends of the magnet plate 1 41, the magnet plate 2 42 and the magnet plate 3 63 are all non-magnetic areas. When the scraper rods 64 pass over the magnet plate 2 42, the scraper rods 64 scrape the iron chips on the magnet plates 1 41 and the magnet plates 2 42 to the left. The scraping rod 64 moves until the iron filings pass through the non-magnetic area at the left end of the magnet plate 1 41 and the magnet plate 2 42, and then fall into the scraping box 1 61 under the scraping of the scraping rod 64. The magnet plate 3 63 is located below the conveyor belt 11 and on the left side of the collecting box 5. The scraping box 2 62 is located on the left side of the magnet plate 3 63. When the magnet column 22 passes through the magnet plate 3 63, the iron filings on the magnet column 22 are attracted by the magnet plate 3 63 more than the magnet column 22. Therefore, the iron filings on the magnet column 22 are adsorbed downward on the magnet plate 3 63. When the scraping rod 64 scrapes off the magnet plate 3 63, the iron filings on the magnet plate 3 63 fall to the left into the scraping box 2 62.

[0039] The specific working principle of the embodiment of the present invention is as follows: First, start the conveyor 1. When the magnet column 22 on the conveyor belt 11 passes over the feed tray 26, the top of the magnet column 22 is pressed downward by the inclined surface 24 to attract the screw, so that the screw is adsorbed on the magnet column 22. Since the diameter of the magnet column 22 is smaller than the diameter of the screw, only one screw can be adsorbed on the magnet column 22 at the same time. When the top of the magnet column 22 is pressed on the limit plate 23, the top of the pressure plate 311 on the mesh plate 32 abuts against the inclined surface 24 of the guide plate 35. As the mounting plate 31 moves to the left, the pressure plate 311 gradually moves downward under the pressure of the inclined surface 24, so that the edge of the mesh hole on the mesh plate 33 scrapes downward The screw is moved to one end, thereby keeping the axis of the screw vertical, and then the upper end surface of the pressure plate 311 abuts against the bottom surface of the guide plate 1 35 to keep the height of the mesh plate 1 32 unchanged. When the mesh plate 1 32 moves downward, the inclined surface 2 of the guide plate 2 36 presses on the front end of the pressure plate 311. As the mounting plate 2 31 moves to the left, the pressure plate 311 gradually moves backward under the top pressure of the inclined surface 2. At this time, the mesh plate 1 32 moves the mesh plate 2 33 forward through the gear 1 38, so that the edges of the upper and lower mesh holes abut against the screw, thereby positioning the screw, and then the front end surface of the pressure plate 311 abuts against the vertical surface of the guide plate 2 36 to keep the edges of the upper and lower mesh holes When the screw adsorbed on the magnet column 22 passes through the magnetic area of ​​the magnet plate 1 41 and the magnet plate 2 42, the iron filings on the surface of the screw are attracted by the magnetic area and adsorbed on the magnetic area. When the magnet column 22 passes through the non-magnetic area, the gear 2 27 is meshed with the rack 3 43. When the rack 3 43 rolls to the left, the gear 27 causes the magnet column 22 to drive the screw to rotate, so that the outer circumferential surface of the screw can all face the magnetic area on the magnet plate 1 41, and then the magnetic area attracts the iron filings on the surface of the screw. When the top of the magnet column 22 is detached from the horizontal plate, the compression spring 25 resets the magnet column 22 upward, so that the lower end of the magnet column 22 is retracted upward for installation. In plate 1 21, at this time, the pressure plate 311 first detaches from the vertical surface of guide plate 2 36, and then detaches from the bottom surface of guide plate 1 35. The mesh plate 1 32 and mesh plate 2 33 are first reset in the horizontal direction under the action of the torsion spring, and then reset upward under the action of the tension spring. Since the distance between the magnet column 22 and the screw becomes farther, the attraction of the magnet column 22 to the screw is reduced, and then the screw falls downward into the collection box 5 under the action of gravity. When the magnet column 22 passes through the magnet plate 3 63, the iron filings on the magnet column 22 are attracted by the magnet plate 3 63 more than the attraction of the magnet column 22, so the iron filings on the magnet column 22 are adsorbed downward on the magnet plate 3 63.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A screw impurity separation device, comprising a conveyor, a conveyor belt is provided on the conveyor, characterized in that: Also includes: The feeding mechanism includes a magnet column that slides up and down and passes through the conveyor belt, and a feeding tray that is arranged below the conveyor belt. When the magnet column passes through the feeding tray, the screws in the feeding tray are adsorbed on the magnet column; The arranging mechanism comprises a mesh plate 1 arranged on the conveyor belt, a mesh plate 2 installed at the lower end of the mesh plate, a driving component 1 for driving the mesh plate 1 to move up and down, and a driving component 2 for making the mesh plate 1 and the mesh plate 2 mutually displaced in the horizontal direction. In the initial state, the mesh holes on the mesh plate 1 and the mesh plate 2 are aligned one by one, and the magnet column can pass through the mesh hole. When the magnet column absorbs the screw, the driving component 1 makes the mesh plate 1 move downward, thereby scraping the screw downward, so that the axis of the screw remains vertical, and then the driving component 2 makes the mesh plate 1 and the mesh plate 2 mutually displaced in the horizontal direction, so that the edges of the upper and lower mesh holes abut against the screw, thereby positioning the screw; The iron removal mechanism is used to remove iron filings on the surface of the screw adsorbed on the magnet column by using magnetic force.

2. The screw impurity separation device according to claim 1, characterized in that: An elastic part is arranged between the magnet column and the conveyor belt, which is used to make the magnet column move upward and reset. A feeding tray is arranged below the conveyor belt, and a limit plate is arranged above the feeding tray. The right end face of the limit plate is provided with an inclined surface 1. When the magnet column passes through the feeding tray, the magnet column is pressed downward by the inclined surface 1 to attract the screw.

3. The screw impurity separation device according to claim 2, characterized in that: A material collection box is arranged on the left side of the feeding tray, and the left end of the limiting plate extends to above the material collection box. The diameter of the magnet column is smaller than the diameter of the screw. When the magnet column passes the left end of the limiting plate, the magnet column moves upward and resets under the action of the elastic part, and the screw is weakened by the attraction of the magnet column and falls downward into the material collection box.

4. The screw impurity separation device according to claim 1, characterized in that: The driving component 1 includes a guide plate 1 installed on the conveyor, the bottom surface of the guide plate 1 is a horizontal surface, the right side surface is an inclined surface 2 in the up and down direction, and a pressure plate is arranged on the mesh plate 1. When the screw is adsorbed on the magnet column and the magnet column moves to the left along the conveyor belt, the inclined surface 2 presses against the upper end of the pressure plate and causes the pressure plate to gradually move downward.

5. The screw impurity separation device according to claim 4, characterized in that: The driving component 2 includes a guide plate 2 arranged on the conveyor, the rear end face of the guide plate 2 is a vertical face, the right side face is an inclined face 3 in the front-to-back direction, and a transmission component is arranged between the mesh plate 1 and the mesh plate 2. When the mesh plate 1 moves downward, the inclined face 3 presses against the front end of the pressure plate and causes the pressure plate to gradually move backward, and the mesh plate 1 moves the mesh plate 2 forward through the transmission component.

6. The screw impurity separation device according to claim 1, characterized in that: The iron removal mechanism includes magnet plates arranged on the front and rear sides of the conveyor belt. The screw is attracted by the magnet plates more than by the magnet column. When the screw adsorbed on the magnet column passes through the magnet plate, the iron filings on the surface of the screw are attracted by the magnet plate and adsorbed on the magnet plate.

7. The screw impurity separation device according to claim 6, characterized in that: The magnet plate is provided with non-magnetic areas and magnetic areas alternately arranged in the left and right directions on the upper side, a rack three is arranged in the left and right directions on the non-magnetic areas, a gear two that can mesh with the rack three is arranged on the upper end of the magnet column, and when the magnet column passes through the non-magnetic area, the gear two meshes with the rack three.

8. The screw impurity separation device according to claim 7, characterized in that: The left end of the magnet plate is a non-magnetic area, an iron filing box is arranged on the left side of the magnet plate, and a scraper bar is also arranged on the conveyor belt. When the scraper bar passes through the magnet plate, the iron filings on the magnet plate are scraped into the iron filing box.

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