A device for screening and sorting scrap iron after crushing

Abstract

The application discloses a kind of waste steel and iron broken screening classification device, including fixed frame, belt conveyor, conveying baffle, the belt conveyor is installed between two the fixed frame, the conveying baffle is installed in the belt surface of belt conveyor, the fixed frame is equipped with impurity cleaning mechanism, the fixed frame is equipped with size classification mechanism;The impurity cleaning mechanism includes U-shaped fixed frame, iron block moving part, cleaning part and absorption filter part;The size classification mechanism includes screening frame, large block collecting box, small block collecting box and sieve aperture adjusting part, the sieve aperture adjusting part adjusts the size of sieve aperture.The beneficial effects of the present application are that the waste steel and iron block can move left and right during conveying, can completely discharge impurities, improve the effect of impurity removal, clean iron filings, dust and waste that is not steel, can adjust the sieve aperture of different sizes according to demand, do not need to replace the screen, improve work efficiency and improve screening efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scrap steel processing, and more particularly to a scrap steel crushing and screening classification device. BACKGROUND

[0002] With the rapid development of the steel industry, the price of iron ore is increasing year by year, and with the development of scrap steel recycling technology, the demand for scrap steel raw materials is also increasing. After the scrap steel is crushed, in order to reuse the waste material, the crushed material needs to be screened.

[0003] The existing scrap steel crushing and screening device, such as the Chinese patent document with application number CN202010153511.2, sets up a conveying belt and a feeding slot, and the crushed material moves to the conveying belt through the feeding slot, which reduces the stacking of the crushed material when passing through the magnetic roller, thereby improving the screening effect. The feeding slot is vibrated by knocking, so that the discharging is more stable. By setting a scraper, the adhesion of the crushed material to the conveying belt is reduced.

[0004] The magnetic material and the non-magnetic material are discharged from the magnetic material discharge port and the non-magnetic material discharge port through the magnetic roller screening, which can only distinguish scrap steel blocks and waste that is not steel, and cannot clean the iron filings and dust attached to the scrap steel blocks. The cleaning effect is not good, the production quality is low, the iron filings and dust float in the air, which can easily harm the health of the workers, and the size of the scrap steel blocks is different, which cannot be classified and collected according to the size difference.

[0005] It should be noted that the above content belongs to the technical cognition of the inventor and does not necessarily constitute prior art. SUMMARY

[0006] In view of the above defects, the present application provides a scrap steel crushing and screening classification device to solve the above problems.

[0007] To achieve the above purpose, the present application adopts the following technical scheme:

[0008] A scrap steel crushing and screening classification device, comprising a fixed frame, a belt conveyor and a conveying partition plate, the fixed frame is provided with two, the belt conveyor is installed between the two fixed frames, the conveying partition plate is installed on the surface of the belt of the belt conveyor, the fixed frame is provided with an impurity cleaning mechanism, and the fixed frame is provided with a size classification mechanism;

[0009] The impurity cleaning mechanism comprises a D-shaped fixing frame, a scrap iron block moving part, a cleaning part and an absorption filtering part, the D-shaped fixing frame is installed on the top of the two fixing frames, the scrap iron block moving part moves the scrap iron block left and right, the iron filings and impurities on the scrap iron block are cleaned through the cleaning part, and the dust and iron filings are collected and cleaned through the absorption filtering part.

[0010] The size classification mechanism comprises a screening frame, a large block collecting box, a small block collecting box and a screen hole adjusting part, the screening frame is installed on one end of the fixing frame, the screening frame is located below the end of the belt conveyor, the screening frame is inclined, the large block collecting box is located below the downward inclined end of the screening frame, the small block collecting box is located below the screening frame, and the screen hole adjusting part adjusts the size of the screen hole.

[0011] Further, the scrap iron block moving part comprises fixed supporting plates installed on the two sides of the fixing frame, two guide sliding rods are installed between the two fixed supporting plates, a plurality of powerful magnet blocks are slidably connected to the guide sliding rods, one of the guide sliding rods is located at one end of the powerful magnet block, the other guide sliding rod is located at the center of the powerful magnet block, the powerful magnet block is located at the back of the belt of the belt conveyor, gaps are formed between adjacent powerful magnet blocks, a reciprocating screw rod is threadedly connected to the other end of the powerful magnet block, adjacent reciprocating screw rods are connected through connecting shafts, a rotating motor is installed on the fixed supporting plate, and an output end of the rotating motor is fixedly connected to one of the reciprocating screw rods.

[0012] Further, the cleaning part comprises a plurality of hollow rotating shafts rotatably connected in the D-shaped fixing frame, one end of each hollow rotating shaft is fixedly connected with a gear, adjacent gears are connected through chains, a driving motor is installed on the D-shaped fixing frame, an output end of the driving motor is fixedly connected with one end of the hollow rotating shaft, air inlet holes are arranged around the hollow rotating shaft, steel wire brushes are installed around the hollow rotating shaft, and the steel wire brushes are located between adjacent air inlet holes.

[0013] Further, the absorption filtering part comprises a dust collecting water tank installed on the D-shaped fixing frame, the other end of the hollow rotating shaft penetrates through and extends out of the D-shaped fixing frame, a rotating joint is connected to the end of the hollow rotating shaft extending out of the D-shaped fixing frame, an air suction pump is installed on the top of the dust collecting water tank, an air suction pipe is installed on the air suction end of the air suction pump, one end of the air suction pipe away from the air suction pump is fixedly connected with the rotating joint, an air outlet pipe is installed on the air outlet end of the air suction pump, the air outlet pipe penetrates through and extends into the dust collecting water tank, a vertical partition plate is installed in the dust collecting water tank, the vertical partition plate is located on one side of the air outlet pipe, a filter screen is installed between the vertical partition plate and the inner wall of the dust collecting water tank, the filter screen is located on the side away from the air outlet pipe, an air outlet valve is installed on the dust collecting water tank, and the air outlet valve is located above the filter screen.

[0014] Further, the screen hole adjusting part comprises a fixed screen installed in the screening frame, a plurality of upper screen holes are arranged on the fixed screen, an opening is arranged at the lower end of the downwardly inclined screening frame, a movable screen is arranged below the fixed screen, bearing strips are installed on both sides of the inside of the screening frame, the two bearing strips are arranged below both sides of the movable screen, the movable screen is slidably connected with the bearing strips, a plurality of lower screen holes are arranged on the movable screen, the surface of the movable screen is closely attached to the back of the fixed screen, the lower screen holes are opposite to the upper screen holes, one end of the movable screen extends out of the opening, a U-shaped guide plate is installed at the end of the movable screen extending out of the opening, the two sides of the U-shaped guide plate are slidably connected with the screening frame, a fixed block is installed on one side of the U-shaped guide plate, a fixed plate is installed on the screening frame, a power push rod is installed on the fixed plate, and the telescopic end of the power push rod is fixedly connected with the fixed block.

[0015] Further, a fixed air cover is installed at the front end of the fixed frame, a blower is installed on the fixed air cover, a material guide plate is installed between the two fixed frames, the material guide plate is arranged below the belt conveyor, and an impurity collecting box is arranged between the two fixed frames, the impurity collecting box is arranged below the material guide plate.

[0016] Further, an inclined support rod is installed at the front end of the fixed frame, the end of the inclined support rod away from the fixed frame is fixedly connected with the fixed air cover, and a feeding guide plate is installed on the fixed frame and arranged above the opening end of the belt conveyor.

[0017] Further, guide sliding grooves are arranged on both sides of the screening frame, limit sliding blocks are installed on the inner walls of the two sides of the U-shaped guide plate, and the limit sliding blocks are slidably connected with the guide sliding grooves.

[0018] Further, the sizes of the upper screen holes and the lower screen holes are the same, and the thickness of the U-shaped guide plate is the same as the thickness of the movable screen.

[0019] The beneficial effects of the present application are as follows: the rotating motor drives the reciprocating wire rod to rotate and drive the powerful magnet block to reciprocate left and right, the powerful magnet block slides along the two guide sliding rods, the powerful magnet block magnetically attracts the scrap iron block, and when the powerful magnet block reciprocates left and right, the scrap iron block reciprocates left and right on the belt conveyor, the scrap iron block can move left and right during conveying, impurities are prevented from being stuck between adjacent scrap iron blocks, impurities are prevented from being stuck at the bottom of the scrap iron block and cannot be discharged, the impurities can be completely discharged, and the impurity removal effect is improved.

[0020] The hollow rotating shaft is driven to rotate by the driving motor, the steel wire brush is rotated by the hollow rotating shaft, the steel wire brush contacts the scrap iron block, the iron filings and dust attached to the surface of the scrap iron block are swept down by the steel wire brush, and at the same time, the waste that is not steel is pushed to the side of the belt conveyor, and the iron filings, dust and waste that is not steel are cleaned, the cleaning effect is improved, the waste that is not steel is prevented from being mixed in the scrap iron block, and the production quality is improved.

[0021] The iron filings and dust are sucked into the dust collecting water tank by the negative pressure generated by the air suction pump, the iron filings and dust fall on the water surface of the dust collecting water tank, some iron filings and dust not falling into the water are filtered by the filter screen, air is discharged from the dust collecting water tank through the air outlet valve, the iron filings and dust are prevented from floating in the air, the harm to the health of workers is avoided, and the environmental protection is improved.

[0022] The movable screen mesh and the fixed screen mesh are moved by the power push rod, the lower screen holes on the movable screen mesh are dislocated with the upper screen holes on the fixed screen mesh, the size of the screen holes at the overlapping position is changed, the larger scrap iron blocks cannot pass through the screen holes, and the smaller scrap iron blocks pass through the screen holes, the screen holes of different sizes can be adjusted according to the requirement, the screen mesh does not need to be replaced, the work efficiency is improved, and the screening efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of the scrap iron crushing and screening classification device.

[0024] Figure 2 It is a side view of the cleaning part.

[0025] Figure 3 It is a bottom view of the iron block moving part.

[0026] Figure 4 It is an enlarged sectional view of the absorption and filtration part.

[0027] Figure 5 It is an enlarged sectional view of the hollow rotating shaft.

[0028] Figure 6 It is a top view of the screen hole adjusting part.

[0029] Figure 7 It is a front sectional view of the screening frame.

[0030] Figure 8 It is a top sectional view of the screening frame.

[0031] In the figure, 1, fixed rack; 2, belt conveyor; 3, conveying partition; 4, U-shaped fixed frame; 5, iron block moving part; 6, cleaning part; 7, absorption filter part; 8, screening frame; 9, large block collection box; 10, small block collection box; 11, screen hole adjusting part; 12, fixed support plate; 13, guide slide rod; 14, strong magnet block; 15, reciprocating wire rod; 16, connecting shaft; 17, rotary motor; 18, hollow rotating shaft; 19, gear; 20, chain; 21, driving motor; 22, air inlet hole; 23, steel wire brush; 24, dust collection water tank; 25, rotary joint; 26, air suction pump; 27, air suction pipe; 28, air outlet pipe; 29, vertical partition plate; 30, filter screen; 31, air outlet valve; 32, fixed screen; 33, upper screen hole; 34, opening; 35, movable screen; 36, bearing ridge; 37, lower screen hole; 38, U-shaped guide plate; 39, fixed block; 40, fixed plate; 41, power push rod; 42, fixed fan cover; 43, air blower; 44, guide plate; 45, impurity collection box; 46, inclined support rod; 47, feeding guide plate; 48, guide chute; 49, limit sliding block. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0033] The present application provides a waste steel and iron crushing and screening classification device, please refer to Figures 1-8 : including fixed rack 1, belt conveyor 2, conveying partition 3, fixed rack 1 is provided with two, belt conveyor 2 is installed between the two fixed racks 1, conveying partition 3 is installed on the belt surface of belt conveyor 2, impurity cleaning mechanism is arranged on the fixed rack 1, size classification mechanism is arranged on the fixed rack 1;

[0034] The impurity cleaning mechanism includes U-shaped fixed frame 4, iron block moving part 5, cleaning part 6 and absorption filter part 7, the U-shaped fixed frame 4 is installed on the top of the two fixed racks 1, the iron block moving part 5 moves left and right on the waste steel and iron block, the iron filings and impurities on the waste steel and iron block are cleaned through the cleaning part 6, and the dust and iron filings are collected and cleaned through the absorption filter part 7;

[0035] The size classification mechanism comprises a screening frame 8, a large piece collecting box 9, a small piece collecting box 10 and a mesh size adjusting part 11. The screening frame 8 is installed on one end of the fixed rack 1 and is located below the end of the belt conveyor 2. The screening frame 8 is arranged in an inclined manner. The large piece collecting box 9 is located below the downwardly inclined end of the screening frame 8. The small piece collecting box 10 is located below the screening frame 8. The mesh size adjusting part 11 adjusts the size of the mesh.

[0036] In actual application, the broken scrap iron pieces are conveyed by the belt conveyor 2. The conveying partition plate 3 on the belt surface of the belt conveyor 2 pushes the scrap iron pieces to move. The scrap iron pieces are cleaned by the cleaning part 6. The dust and iron filings are collected and cleaned by the absorption and filtration part 7. The scrap iron pieces are classified by size by the screening frame 8. The large scrap iron pieces are collected into the large piece collecting box 9. The small scrap iron pieces are collected into the small piece collecting box 10. The size of the mesh is adjusted by the mesh size adjusting part 11.

[0037] Referring to the drawings Figure 1 and the drawings Figure 3 The iron piece moving part 5 comprises two fixed supporting plates 12 installed on the two sides of the fixed rack 1. Two guide sliding rods 13 are installed between the two fixed supporting plates 12. A plurality of powerful magnet pieces 14 are slidably connected to the guide sliding rods 13. One guide sliding rod 13 is located at one end of the powerful magnet piece 14. The other guide sliding rod 13 is located at the center of the powerful magnet piece 14. The powerful magnet piece 14 is located at the back of the belt of the belt conveyor 2. There is a gap between adjacent powerful magnet pieces 14. A reciprocating screw rod 15 is threadedly connected to the other end of the powerful magnet piece 14. Adjacent reciprocating screw rods 15 are connected by a connecting shaft 16. A rotating motor 17 is installed on the fixed supporting plate 12. The output end of the rotating motor 17 is fixedly connected to one end of the reciprocating screw rod 15.

[0038] In actual application, when the scrap iron pieces are conveyed by the belt conveyor 2, the scrap iron pieces are magnetically attracted to the surface of the belt by the powerful magnet pieces 14 to avoid moving and falling off the belt conveyor 2. The rotating motor 17 starts to work. The output end of the rotating motor 17 drives the reciprocating screw rod 15 to rotate. The reciprocating screw rod 15 drives the powerful magnet piece 14 to reciprocate left and right. The powerful magnet piece 14 slides along the two guide sliding rods 13. The guide sliding rods 13 guide the powerful magnet piece 14. The powerful magnet piece 14 magnetically attracts the scrap iron pieces. When the powerful magnet piece 14 reciprocates left and right, the scrap iron pieces reciprocate left and right on the belt conveyor 2. The scrap iron pieces can move left and right during the conveying process. The impurities are not stuck between adjacent scrap iron pieces or at the bottom of the scrap iron pieces. The impurities can be completely discharged. The impurity removal effect is improved.

[0039] Referring to the drawings Figure 1, the accompanying drawings Figure 2 and the accompanying drawings Figure 4 The cleaning part 6 comprises a plurality of hollow rotating shafts 18 rotatably connected in the U-shaped fixing frame 4, one end of each of the hollow rotating shafts 18 is fixedly connected with a gear 19, adjacent gears 19 are connected through a chain 20, a driving motor 21 is installed on the U-shaped fixing frame 4, an output end of the driving motor 21 is fixedly connected with one end of the hollow rotating shaft 18, air inlet holes 22 are arranged around the hollow rotating shaft 18, steel wire brushes 23 are installed around the hollow rotating shaft 18, and the steel wire brushes 23 are located between adjacent air inlet holes 22.

[0040] In actual application, during the conveying of the scrap steel blocks, the driving motor 21 starts to work, the driving motor 21 drives the hollow rotating shaft 18 at one end to rotate, drives all the hollow rotating shafts 18 to rotate together through the gears 19 and the chain 20, drives the steel wire brushes 23 to rotate, the steel wire brushes 23 contact the scrap steel blocks, and the iron filings and dust attached to the surface of the scrap steel blocks are swept down through the steel wire brushes 23, at the same time, the waste other than steel can be pushed to the side of the belt conveyor 2, and the iron filings, dust and waste other than steel are cleaned, the cleaning effect is improved, the waste other than steel is prevented from being mixed in the scrap steel blocks, and the production quality is improved.

[0041] Referring to the accompanying drawings Figure 1 and the accompanying drawings Figure 4 The absorption and filtration part 7 comprises a dust collection water tank 24 installed on the U-shaped fixing frame 4, the other end of the hollow rotating shaft 18 penetrates through the U-shaped fixing frame 4, a rotary joint 25 is connected to one end of the hollow rotating shaft 18 extending out of the U-shaped fixing frame 4, a suction pump 26 is installed on the top of the dust collection water tank 24, a suction pipe 27 is installed at the suction end of the suction pump 26, one end of the suction pipe 27 away from the suction pump 26 is fixedly connected with the rotary joint 25, an air outlet pipe 28 is installed at the air outlet end of the suction pump 26, the air outlet pipe 28 penetrates into the dust collection water tank 24, a vertical partition plate 29 is installed in the dust collection water tank 24, the vertical partition plate 29 is located at one side of the air outlet pipe 28, a filter screen 30 is installed between the vertical partition plate 29 and the inner wall of the dust collection water tank 24, the filter screen 30 is located at one side away from the air outlet pipe 28, an air outlet valve 31 is installed on the dust collection water tank 24, and the air outlet valve 31 is located above the filter screen 30.

[0042] Specifically in practical application, when the hollow rotating shaft 18 drives the steel wire brush 23 to rotate, iron filings and dust float in the air, the air suction pump 26 starts to work to generate negative pressure, the iron filings and dust enter the hollow rotating shaft 18 through the air inlet hole 22, and then enter the dust collecting water tank 24 through the rotary joint 25, the air suction pipe 27 and the air outlet pipe 28, so that the iron filings and dust fall onto the water surface of the dust collecting water tank 24, some iron filings and dust that do not fall into the water are filtered by the filter screen 30, and air is discharged from the dust collecting water tank 24 through the air outlet valve 31, so as to avoid that the iron filings and dust float in the air and cause harm to the health of workers, and the environmental protection performance is improved.

[0043] Referring to the drawings accompanying the specification Figure 6 , the drawings accompanying the specification Figure 7 and the drawings accompanying the specification Figure 8 , the screen hole adjusting part 11 comprises a fixed screen 32 fixedly installed in the screening frame 8, a plurality of upper screen holes 33 are arranged on the fixed screen 32, the screening frame 8 is provided with an opening 34 at the downwardly inclined end, a movable screen 35 is arranged below the fixed screen 32, bearing strips 36 are arranged on both sides of the inside of the screening frame 8, the two bearing strips 36 are arranged below both sides of the movable screen 35, the movable screen 35 is slidably connected with the bearing strips 36, a plurality of lower screen holes 37 are arranged on the movable screen 35, the surface of the movable screen 35 is tightly attached to the back surface of the fixed screen 32, the lower screen holes 37 are opposite to the upper screen holes 33, one end of the movable screen 35 extends out of the opening 34, a U-shaped guide plate 38 is arranged at the end of the movable screen 35 extending out of the opening 34, the two sides of the U-shaped guide plate 38 are slidably connected with the screening frame 8, a fixed block 39 is arranged on one side of the U-shaped guide plate 38, a fixed plate 40 is arranged on the screening frame 8, a power push rod 41 is arranged on the fixed plate 40, and the telescopic end of the power push rod 41 is fixedly connected with the fixed block 39.

[0044] Specifically in practical application, when the hollow rotating shaft 18 drives the steel wire brush 23 to rotate, iron filings and dust float in the air, the air suction pump 26 starts to work to generate negative pressure, the iron filings and dust enter the hollow rotating shaft 18 through the air inlet hole 22, and then enter the dust collecting water tank 24 through the rotary joint 25, the air suction pipe 27 and the air outlet pipe 28, so that the iron filings and dust fall onto the water surface of the dust collecting water tank 24, some iron filings and dust that do not fall into the water are filtered by the filter screen 30, and air is discharged from the dust collecting water tank 24 through the air outlet valve 31, so as to avoid that the iron filings and dust float in the air and cause harm to the health of workers, and the environmental protection performance is improved.

[0045] Referring to the drawings accompanying the specification Figure 2The front end of the fixed frame 4 is provided with a fixed air cover 42, the fixed air cover 42 is provided with a blower 43, the two fixed frames 1 are provided with a guide plate 44, the guide plate 44 is located below the belt conveyor 2, the two fixed frames 1 are provided with an impurity collecting box 45, and the impurity collecting box 45 is located below the guide plate 44.

[0046] Specifically in actual application, when the impurities are cleaned, the blower 43 starts to work, air is blown to the belt conveyor 2 through the fixed air cover 42, the scrap iron block is magnetically attracted by the strong magnet block 14 and cannot be blown, and the impurities that are not steel are blown to the guide plate 44, at the same time, the belt conveyor 2 and the iron filings and dust on the scrap iron block can be floated up by blowing, and the impurities that are not steel fall into the impurity collecting box 45 under the guidance of the guide plate 44 and are collected.

[0047] Referring to the drawings accompanying the specification Figure 1 and the drawings accompanying the specification Figure 2 The front end of the fixed frame 1 is provided with an inclined support rod 46, the far end of the inclined support rod 46 from the fixed frame 1 is fixedly connected with the fixed air cover 42, and the fixed frame 1 is provided with an inlet guide plate 47

[0048] Specifically in actual application, the fixed air cover 42 is supported by the inclined support rod 46, so that the fixed air cover 42 is prevented from tilting and falling, and the scrap iron block is guided to fall on the belt conveyor 2 by the inlet guide plate 47.

[0049] Referring to the drawings accompanying the specification Figure 8 Both sides of the screening frame 8 are provided with guide sliding grooves 48, and the inner walls of the two sides of the U-shaped guide plate 38 are provided with limiting sliding blocks 49, and the limiting sliding blocks 49 are slidably connected with the guide sliding grooves 48.

[0050] Specifically in actual application, when the U-shaped guide plate 38 moves, the U-shaped guide plate 38 drives the limiting sliding blocks 49 to slide along the guide sliding grooves 48, the U-shaped guide plate 38 is limited and guided by the limiting sliding blocks 49 and the guide sliding grooves 48, and meanwhile, the U-shaped guide plate 38 is prevented from falling from the screening frame 8.

[0051] Referring to the drawings accompanying the specification Figure 6 and the drawings accompanying the specification Figure 7 The upper screen hole 33 and the lower screen hole 37 are of the same size, and the thickness of the U-shaped guide plate 38 is the same as the thickness of the movable screen 35.

[0052] In actual application, the thickness of the L-shaped guide plate 38 is the same as that of the movable screen 35, and the large scrap iron blocks slide from the fixed screen 32 to the movable screen 35 and the L-shaped guide plate 38, and the large scrap iron blocks are guided by the movable screen 35 and the L-shaped guide plate 38, so that the large scrap iron blocks are prevented from being stuck between the movable screen 35 and the L-shaped guide plate 38.

[0053] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the description.

[0054] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, however, it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element being indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0056] In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features being indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “plurality” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0057] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixing" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

Claims

1. A screening and sorting device for crushed scrap steel, comprising a fixed frame (1), a belt conveyor (2), and a conveying partition (3), wherein two fixed frames (1) are provided, the belt conveyor (2) is installed between the two fixed frames (1), and the conveying partition (3) is installed on the belt surface of the belt conveyor (2), characterized in that, The fixed frame (1) is provided with an impurity cleaning mechanism and a size sorting mechanism; The impurity cleaning mechanism includes a U-shaped fixed frame (4), an iron block moving part (5), a cleaning part (6), and an absorption and filtration part (7). The U-shaped fixed frame (4) is installed on the top of the two fixed frames (1). The iron block moving part (5) moves the scrap iron block left and right. The cleaning part (6) cleans the iron filings and impurities on the scrap iron block. The absorption and filtration part (7) collects and cleans the dust and iron filings. The size sorting mechanism includes a screening frame (8), a large piece collection box (9), a small piece collection box (10), and a sieve hole adjustment part (11). The screening frame (8) is installed on the fixed frame (1) at one end. The screening frame (8) is located below the end of the belt conveyor (2). The screening frame (8) is inclined. The large piece collection box (9) is located below the downward inclined end of the screening frame (8). The small piece collection box (10) is located below the screening frame (8). The sieve hole adjustment part (11) adjusts the size of the sieve hole. The iron block moving part (5) includes fixed support plates (12) installed on both sides of the fixed frame (1). Two guide slides (13) are installed between the two fixed support plates (12). Multiple strong magnet blocks (14) are slidably connected on the guide slides (13). One guide slide (13) is located at one end of the strong magnet block (14), and the other guide slide (13) is located at the center of the strong magnet block (14). The strong magnet block (14) is located on the back of the belt of the belt conveyor (2). There is a gap between adjacent strong magnet blocks (14). The other end of the strong magnet block (14) is threadedly connected to a reciprocating screw (15). Adjacent reciprocating screws (15) are connected by a connecting shaft (16). A rotary motor (17) is installed on the fixed support plate (12). The output end of the rotary motor (17) is fixedly connected to one end of the reciprocating screw (15).

2. The waste steel crushing and sorting device according to claim 1, characterized in that, The cleaning unit (6) includes a plurality of hollow shafts (18) rotatably connected in a U-shaped fixing frame (4). One end of the hollow shaft (18) is fixedly connected to a gear (19). Adjacent gears (19) are connected by a chain (20). A drive motor (21) is installed on the U-shaped fixing frame (4). The output end of the drive motor (21) is fixedly connected to one end of the hollow shaft (18). Air inlets (22) are provided around the hollow shaft (18). Wire brushes (23) are installed around the hollow shaft (18). The wire brushes (23) are located between adjacent air inlets (22).

3. The waste steel crushing and sorting device according to claim 2, characterized in that, The absorption and filtration section (7) includes a dust collection tank (24) mounted on a U-shaped fixed frame (4). The other end of a hollow rotating shaft (18) extends through the U-shaped fixed frame (4). A rotary joint (25) is connected to one end of the hollow rotating shaft (18) extending out of the U-shaped fixed frame (4). An air pump (26) is mounted on the top of the dust collection tank (24). An air extraction pipe (27) is installed at the air extraction end of the air pump (26). The end of the air extraction pipe (27) away from the air pump (26) is fixedly connected to the rotary joint (25). An air outlet pipe (28) is installed at the air outlet end. The air outlet pipe (28) extends through into the dust collection water tank (24). A vertical partition plate (29) is installed inside the dust collection water tank (24). The vertical partition plate (29) is located on one side of the air outlet pipe (28). A filter screen (30) is installed between the vertical partition plate (29) and the inner wall of the dust collection water tank (24). The filter screen (30) is located on the side away from the air outlet pipe (28). An air outlet valve (31) is installed on the dust collection water tank (24). The air outlet valve (31) is located above the filter screen (30).

4. The waste steel crushing and sorting device according to claim 1, characterized in that, The sieve hole adjustment part (11) includes a fixed sieve (32) fixedly installed in the screening frame (8). The fixed sieve (32) has multiple upper sieve holes (33). The screening frame (8) has an opening (34) at its downwardly inclined end. A movable sieve (35) is provided below the fixed sieve (32). Bearing bars (36) are installed on both sides inside the screening frame (8). The two bearing bars (36) are located on both sides below the movable sieve (35). The movable sieve (35) is slidably connected to the bearing bars (36). The movable sieve (35) has multiple lower sieve holes (37). The surface of the screen is in close contact with the back of the fixed screen (32). The lower screen hole (37) and the upper screen hole (33) are opposite to each other. One end of the movable screen (35) extends out of the opening (34). A U-shaped guide plate (38) is installed on one end of the movable screen (35) extending out of the opening (34). The two sides of the U-shaped guide plate (38) are slidably connected to the screening frame (8). A fixed block (39) is installed on one side of the U-shaped guide plate (38). A fixed plate (40) is installed on the screening frame (8). A power push rod (41) is installed on the fixed plate (40). The telescopic end of the power push rod (41) is fixedly connected to the fixed block (39).

5. The waste steel crushing and sorting device according to claim 1, characterized in that, The front end of the C-shaped fixed frame (4) is equipped with a fixed hood (42), and a blower (43) is installed on the fixed hood (42). A guide plate (44) is installed between the two fixed frames (1), and the guide plate (44) is located below the belt conveyor (2). An impurity collection box (45) is provided between the two fixed frames (1), and the impurity collection box (45) is located below the guide plate (44).

6. The waste steel crushing and sorting device according to claim 5, characterized in that, The fixed frame (1) is equipped with an inclined support rod (46) at the front end. The end of the inclined support rod (46) away from the fixed frame (1) is fixedly connected to the fixed hood (42). The fixed frame (1) is equipped with a feed guide plate (47), which is located above the beginning of the belt conveyor (2).

7. The waste steel crushing and sorting device according to claim 4, characterized in that, The filter box (8) is provided with guide grooves (48) on both sides, and limit sliders (49) are installed on the inner walls of both sides of the U-shaped guide plate (38). The limit sliders (49) are slidably connected to the guide grooves (48).

8. The waste steel crushing and sorting device according to claim 4, characterized in that, The upper sieve hole (33) and the lower sieve hole (37) are the same size, and the thickness of the U-shaped guide plate (38) is the same as the thickness of the movable screen (35).

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