A method and system for detecting grade classification of stored scrap steel

Abstract

The invention discloses a method and system for detecting the grade classification of collected and stored scrap steel, and relates to the technical field of old metal recycling and classification. The method and system for detecting the grade classification of collected and stored scrap steel comprise a conveyor belt, an electromagnet is arranged above the conveyor belt to detect hollow materials, a water pool and a metering table are arranged at the forward end of the conveyor belt, the volume and mass of the materials are measured in combination with a visual system to determine the density of the materials, and the materials are graded by the density. The grades are graded in combination with a visual recognition system and the measurement of the density of the metal materials. On the one hand, the problems of manual grade determination in the prior art, which is labor-intensive and inefficient, and prone to errors, are avoided, and an overly complicated recognition system is not required. The materials are washed and screened, and then the average density of the materials is obtained by measuring the volume and mass of the materials. The composition of the materials can be directly graded according to the density, which is faster and more accurate than the manual method.

Description

Technical Field

[0001] The present invention relates to a scrap steel classification method, to the technical field of waste metal recycling and classification, and in particular to a method and system for detecting the grade classification of stored scrap steel. Background Art

[0002] Recycling scrap metal for re-production is one of the main activities of steel mills. At present, steel companies still mainly rely on manual work to determine the size of recycled metals. The centralized recycling of a large amount of scrap metal from different sources is prone to scheduling errors, which brings great trouble to the production activities of steel mills.

[0003] In order to improve work efficiency and reduce labor costs, the existing filing method needs to be improved. It is planned to use a fully automatic detection method to help classify and file recycled materials. However, scrap metal cannot rely solely on general visual inspection modules to ensure detection accuracy. There are many factors that can easily affect the filing accuracy. On the one hand, the shapes of recyclables vary greatly. On the other hand, metals with different contents have different filing accuracy.

[0004] Based on the various technical needs of metal recycling scheduling, a method and system for detecting the grade classification of stored scrap steel is involved, which combines the measurement of the mass and volume of recycled metals with a visual system to correct errors, so as to achieve fast and accurate scheduling activities. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method and system for collecting and storing scrap steel grades and classification. The method and system are combined with a visual system, and an electromagnet for sorting the scrap steel is provided, and a water pool and a measuring table for measuring the mass and volume of the material are provided. The overall density of the material is automatically and accurately obtained, and the scrap steel is filed according to the material density, avoiding the problems of high labor costs, many interference factors, and low efficiency in existing operations.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a scrap steel grade classification and detection system for collection and storage, comprising a conveyor belt and a cleaning nozzle arranged above the conveyor belt, the conveyor belt is used to transport the scrap metal to a designated location for storage, and the cleaning nozzle is used to perform high-pressure washing on the scrap metal to prevent a large amount of soil and stone from adhering to the surface of the scrap metal and affecting the subsequent density measurement.

[0007] An electromagnet is arranged above the conveyor belt. The electromagnet controls the magnetic strength according to the volume of the material, and absorbs and picks out metal with a significant mass-to-volume ratio from the conveyor belt to avoid affecting the subsequent calculation of the material density.

[0008] A water pool is provided at the forward end of the conveyor belt, and a metering platform is provided behind the water pool. The material on the conveyor belt enters the water pool for volume measurement, and then the mass is weighed by the metering platform, and the density is determined by the mass and volume ratio.

[0009] Periodic fences are respectively arranged above the conveyor belt corresponding to the water pool and the metering platform, and the periodic fences control the materials entering the water pool and the metering platform. The water pool and the metering platform are respectively provided with cameras to help monitor the quality and volume of the materials in real time.

[0010] Preferably, a column is fixedly connected to one side of the conveyor belt, and a hinge rod is hingedly provided on the side of the column, and the hinge rod can rotate according to the hinge point with the column.

[0011] A mounting block is slidingly provided on the side of the hinge rod, and the electromagnet is fixedly connected to the mounting block. The electromagnet is set at a certain height from the conveyor belt through the mounting block. The electromagnet applies a suction force of a certain intensity to the material below. When the density of the material is obviously lower than its volume, it will be sucked up and separated from the conveyor belt, and then the hollow material will be screened by the electromagnet.

[0012] Preferably, a first spring is fixedly connected between the mounting block and the side of the hinge rod away from the column, a pull rope is fixedly connected to the other side of the mounting block, a roller is fixedly connected to the end of the pull rope away from the mounting block, and an electrical spring is provided on the lower surface of the mounting block corresponding to the roller.

[0013] After the electromagnet absorbs the material, the mass of the mounting block increases, connecting the power-connecting spring piece that controls the roller movement circuit, and then the roller rotates to reel in the pull rope, pulling the mounting block to slide along the hinge rod toward one side of the column, and disconnecting the roller control circuit after sliding to a certain point, thereby enabling the electromagnet to detect the hollow material.

[0014] The first spring is stretched during the sliding of the mounting block toward one end of the column, and after the material falls, the mounting block is reset by the elastic potential energy of the first spring, thereby achieving continuous use of the structure.

[0015] Preferably, a slider is slidingly provided on the side of the mounting block, and a second spring is provided between the mounting block and the slider. After the electromagnet absorbs the metal material, the overall mass of the mounting block increases, the second spring is compressed by the force, and the position of the slider relative to the mounting block advances, thereby connecting the power-connecting spring sheet between the two. If the electromagnet does not absorb the metal material, even if the suction force is sufficient to compress the second spring, it will only briefly connect the control circuit of the roller and cannot carry the material out of the range of the conveyor belt.

[0016] The side of the slider is provided with a roller, and the mounting block is pressed against the hinge rod through the roller on the side of the slider to prevent the friction coefficient of the mounting block from being too large to affect the traction movement.

[0017] Preferably, an extension rod is vertically fixed to the mounting block corresponding to the side of the hinge rod, and an infrared measuring instrument is fixed to the lower surface of the extension rod. The infrared measuring instrument is associated with adjusting the magnetic strength of the electromagnet. The surface area and thickness of the material passing through the conveyor belt are detected by the infrared measuring instrument, and the quality of the material is estimated. The strength of the magnetism of the electromagnet on the material is controlled accordingly, so as to achieve the purpose of the electromagnet applying appropriate suction force to materials of different volumes for screening, thereby avoiding errors caused by large and hollow materials being screened through this system.

[0018] Preferably, a guide roller is provided on the inner side of the water pool corresponding to the conveyor belt, and the guide roller enables the material conveyed by the conveyor belt to enter below the liquid surface of the water pool to measure the volume. A guide bar is fixedly provided on the end of the guide roller, and the guide bar prevents the material from falling off the conveyor belt when sliding down the inclined surface of the conveyor belt into the water pool.

[0019] Preferably, the periodic baffle includes a rotating shaft, which is fixedly arranged on one side of the conveyor belt. A turntable is arranged on the bearing on the side of the rotating shaft and above the conveyor belt. A baffle is fixedly connected to the side of the turntable corresponding to the conveyor belt, and a periodic push block is arranged above the turntable.

[0020] The periodic push block performs periodic motion under the action of the power equipment, periodically pushing the turntable to deflect at a fixed angle, and then intercepting the material on the conveyor belt through the baffle fixed on the side of the turntable, so that the material can enter the water pool and the metering platform in batches for measurement, avoiding the error between the incoming and outgoing materials affecting the measurement accuracy.

[0021] Preferably, a slide rail is fixedly connected to the side of the rotating shaft, and the periodic push block is slidably arranged above the turntable via the slide rail. A fixing bar is fixedly connected to the upper surface of the turntable corresponding to the baffle. With the periodic movement of the periodic push block, the turntable is in tight contact with the periodic push block via the fixing bar on the upper surface, thereby realizing the periodic driving of the turntable by the periodic push block.

[0022] Preferably, a fixing plate is fixed parallel to the top of the turntable, and a stopper is provided on the lower surface of the fixing plate through a spring to tighten and insert the stopper, and the stopper extends out of the fixing plate under the action of the spring, thereby blocking the fixing bar on the upper surface of the turntable.

[0023] The side of the stopper is fixedly connected with a wedge block corresponding to the periodic push block. When the periodic push block approaches the fixed bar, the wedge block is first pressed against the fixed bar to shrink the stopper, so that the turntable can continue to rotate smoothly. After the periodic push block passes the wedge block position, the stopper is reset and the turntable continues to be limited in rotation, ensuring the periodic fence's blocking effect on the material on the conveyor belt and will not be pushed due to the increase in the mass of the material on the conveyor belt.

[0024] A method for detecting the grade classification of stored scrap steel includes any of the above-mentioned detection systems for the grade classification of stored scrap steel, and the detection process includes the following steps:

[0025] S1, the conveyor belt transports the materials to the storage end in batches, and the attached mud and sand are washed in all directions through the cleaning nozzle;

[0026] S2. When the material passes through the electromagnet, the volume of the material is first measured by an infrared measuring instrument arranged in front of the electromagnet, and then the magnetic strength of the electromagnet is adjusted according to the volume of the material, so as to screen out the material with a significantly larger volume-to-mass ratio and apply suction to it to pick out the hollow material, so as to avoid the problem that the volume of the hollow material is much larger than that of the solid material and affects the measurement value;

[0027] S3. The screened materials enter the water pool in batches through the periodic fence control, and are then transported to the metering platform for weighing through the conveyor belt. The volume change of the liquid in the water pool and the reading of the metering platform are monitored by the camera to obtain the total volume and mass ratio of the material, calculate the material density, and set the material according to the density.

[0028] The present invention discloses a method and system for detecting the grade classification of stored scrap steel, which has the following beneficial effects:

[0029] 1. The method and system for collecting and storing scrap steel grades, combined with a visual recognition system and the measurement of metal material density for filing, avoids the problems of manual filing in the prior art, which is labor-intensive, inefficient, and prone to errors, and does not require an overly complex recognition system. The material is washed and screened, and then the average density of the material is obtained by measuring the volume and mass of the material. The material composition can be directly filed based on the density, which is faster and more accurate than manual methods.

[0030] 2. The method and system for detecting the grade classification of scrap steel collected and stored is to set an electromagnet at a certain height above the conveyor belt, and measure the volume of the passing material by an infrared measuring instrument set in front of the electromagnet. The magnetic strength of the electromagnet is adjusted accordingly according to the volume of the material, and the hollow material is screened with a more suitable suction force to avoid the influence of a large number of gaps on the subsequent material density measurement.

[0031] 3. In the method and system for collecting and storing scrap steel grade classification detection, the electromagnet is slidably installed through a movable mounting block. After the electromagnet absorbs the material, the mass changes. The driving power of the mounting block is turned on through the mass change, and then the mounting block is driven to carry the absorbed material to the outside of the conveyor belt. After the material leaves the electromagnet, the electromagnet is quickly reset to achieve reuse.

[0032] 4. The method and system for detecting the grade classification of scrap steel collected and stored sets periodic barriers in front of the water pool and the metering table to intercept the transportation of materials in batches, so that the measurement of material volume and mass is carried out in sections to avoid confusion caused by the disorder of materials. In addition, the barriers are fixed by a turntable, and the turntable is periodically driven by a periodic push block, and a stopper is provided to limit the rotation angle of the turntable to avoid the problem that the mass of the material on the conveyor belt drives the periodic barriers to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the electromagnet installation structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the electromagnet driving structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the mounting plate of the present invention;

[0038] Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle;

[0039] Figure 6 It is a schematic diagram of the internal structure of the water pool of the present invention;

[0040] Figure 7 This is a schematic diagram of the periodic guardrail structure of the present invention;

[0041] Figure 8 This is a schematic diagram of the periodic drive structure of the periodic baffle of the present invention.

[0042] In the figure: 1. conveyor belt; 2. cleaning nozzle; 3. electromagnet; 4. water pool; 5. metering table; 6. periodic fence; 601. rotating shaft; 602. turntable; 603. baffle; 604. periodic push block; 7. column; 8. hinge rod; 9. mounting block; 10. first spring; 11. pull rope; 12. roller; 13. power spring; 14. slider; 15. second spring; 16. roller; 17. extension rod; 18. infrared measuring instrument; 19. guide roller; 20. guide strip; 21. slide rail; 22. fixing strip; 23. block; 24. wedge. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The embodiment of the present invention discloses a system for detecting the grade classification of scrap steel collected and stored;

[0045] According to the attached Figure 1 and attached Figure 2 As shown, it includes a conveyor belt 1 and a cleaning nozzle 2 arranged above the conveyor belt 1. The conveyor belt 1 is used to transport the scrap metal to a designated location for storage. The cleaning nozzle 2 is used to perform high-pressure washing on the scrap metal to prevent a large amount of soil and rocks from adhering to the surface of the scrap metal and affecting the subsequent density measurement.

[0046] An electromagnet 3 is arranged above the conveyor belt 1. The electromagnet 3 controls the magnetic strength according to the volume of the material, and absorbs and picks out the metal with a significant mass-to-volume ratio from the conveyor belt 1 to avoid affecting the subsequent calculation of the material density.

[0047] A water pool 4 is provided at the forward end of the conveyor belt 1, and a metering platform 5 is provided behind the water pool 4. The material on the conveyor belt 1 enters the water pool 4 for volume measurement, and then the mass is weighed by the metering platform 5, and the density is determined by the mass and volume ratio.

[0048] Periodic fences 6 are provided above the conveyor belt 1 corresponding to the water pool 4 and the metering platform 5, respectively. The periodic fences 6 control the materials entering the water pool 4 and the metering platform 5. The water pool 4 and the metering platform 5 are provided with cameras to help monitor the quality and volume of the materials in real time.

[0049] According to the attached Figure 2 As shown, a column 7 is fixedly connected to one side of the conveyor belt 1 , and a hinge rod 8 is hingedly provided on the side of the column 7 , and the hinge rod 8 can rotate according to the hinge point with the column 7 .

[0050] According to the attached Figure 3 As shown, a mounting block 9 is slidingly provided on the side of the hinge rod 8, and the electromagnet 3 is fixedly connected to the mounting block 9. The electromagnet 3 is set at a certain height from the conveyor belt 1 through the mounting block 9. The electromagnet 3 applies a suction force of a certain intensity to the material below. When the density of the material is obviously lower than its volume, it will be sucked up and separated from the conveyor belt 1 by the suction force, and then the hollow material will be screened by the electromagnet 3.

[0051] Preferably, a first spring 10 is fixedly connected between the mounting block 9 and the side of the hinge rod 8 away from the column 7 , a pull rope 11 is fixedly connected to the other side of the mounting block 9 , and a roller 12 is fixedly connected to the end of the pull rope 11 away from the mounting block 9 .

[0052] An extension rod 17 is vertically fixed to the mounting block 9 corresponding to the side of the hinge rod 8, and an infrared measuring instrument 18 is fixed to the lower surface of the extension rod 17. The infrared measuring instrument 18 is used to adjust the magnetic strength of the electromagnet 3. The surface area and thickness of the material passing through the conveyor belt 1 are detected by the infrared measuring instrument 18, and then the quality of the material is estimated. The strength of the magnetism of the electromagnet 3 to the material is controlled accordingly, so that the electromagnet 3 can exert a suction force of appropriate size on materials of different volumes for screening, thereby avoiding errors caused by large and hollow materials being screened through this system.

[0053] According to the attached Figure 4 and attached Figure 5 As shown, a power connection spring 13 is provided on the lower surface of the mounting block 9 corresponding to the winding roller 12 .

[0054] After the electromagnet 3 absorbs the material, the mass of the mounting block 9 increases, connecting the power-connecting spring piece 13 of the motion circuit of the control roller 12, so that the roller 12 rotates to reel in the pull rope 11, and the mounting block 9 is pulled to slide along the hinge rod 8 toward the side of the column 7. After sliding to a certain point, the control circuit of the roller 12 is disconnected, thereby realizing the detection of the hollow material by the electromagnet 3.

[0055] The first spring 10 is stretched during the sliding of the mounting block 9 toward one end of the column 7. After the material falls, the mounting block 9 is reset by the elastic potential energy of the first spring 10, thereby realizing the continuous use of the structure.

[0056] A slider 14 is slidably provided on the side of the mounting block 9, and a second spring 15 is provided between the mounting block 9 and the slider 14. After the electromagnet 3 attracts the metal material, the overall mass of the mounting block 9 increases, and the second spring 15 is compressed by the force, and the slider 14 moves relative to the mounting block 9, thereby connecting the power-connecting spring piece 13 therebetween. If the electromagnet 3 does not attract the metal material, even if the suction force is sufficient to compress the second spring 15, it will only briefly connect the control circuit of the roller 12 and cannot carry the material out of the range of the conveyor belt 1.

[0057] A roller 16 is provided on the side of the slider 14, and the mounting block 9 is pressed against the hinge rod 8 through the roller 16 on the side of the slider 14 to prevent the friction coefficient of the mounting block 9 from being too large to affect the traction movement.

[0058] According to the attached Figure 6 and attached Figure 7As shown, a guide roller 19 is provided on the inner side of the water pool 4 corresponding to the conveyor belt 1. The guide roller 19 enables the conveyor belt 1 to convey the material below the liquid surface of the water pool 4 to measure the volume. A guide bar 20 is fixedly provided at the end of the guide roller 19. The guide bar 20 prevents the material from falling off the conveyor belt 1 when sliding down the inclined surface of the conveyor belt 1 into the water pool 4.

[0059] The periodic baffle 6 includes a rotating shaft 601, which is fixedly arranged on one side of the conveyor belt 1. A turntable 602 is arranged on the side of the rotating shaft 601 and above the conveyor belt 1. A baffle 603 is fixedly connected to the side of the turntable 602 corresponding to the conveyor belt 1, and a periodic push block 604 is arranged above the turntable 602.

[0060] The periodic push block 604 performs periodic motion under the action of the power equipment, periodically pushing the turntable 602 to deflect at a fixed angle, and then intercepting the material on the conveyor belt 1 through the baffle 603 fixed on the side of the turntable 602, so that the material can enter the water pool 4 and the metering table 5 in batches for measurement, avoiding the error between the incoming and outgoing materials affecting the measurement accuracy.

[0061] According to the attached Figure 8 As shown, the side of the rotating shaft 601 is fixedly connected with a slide rail 21, and the periodic push block 604 is slidably set above the turntable 602 through the slide rail 21. The upper surface of the turntable 602 is fixedly connected with a fixed bar 22 corresponding to the baffle 603. With the periodic movement of the periodic push block 604, the turntable 602 is in close contact with the periodic push block 604 through the fixed bar 22 on the upper surface, thereby realizing the periodic driving of the turntable 602 through the periodic push block 604.

[0062] A fixing plate is fixed parallel to the top of the turntable 602 , and a stopper 23 is provided on the lower surface of the fixing plate through a spring to tighten and insert the stopper 23 . The stopper 23 extends out of the fixing plate under the action of the spring, thereby blocking the fixing bar 22 on the upper surface of the turntable 602 .

[0063] The side of the stopper 23 is fixedly connected with a wedge block 24 corresponding to the periodic push block 604. When the periodic push block 604 approaches the fixed bar 22, the wedge block 24 is first pressed against to shrink the stopper 23, so that the turntable 602 can pass smoothly and continue to rotate. After the periodic push block 604 passes the position of the wedge block 24, the stopper 23 is reset, and the turntable 602 is continued to be limited in rotation, thereby ensuring the blocking effect of the periodic fence 6 on the material on the conveyor belt 1 and will not be pushed due to the increase in the mass of the material on the conveyor belt 1.

[0064] A method for detecting the grade classification of stored scrap steel includes any of the above-mentioned detection systems for the grade classification of stored scrap steel, and the detection process comprises the following steps:

[0065] S1, conveyor belt 1 transports the materials to the storage end in batches, and the attached mud and sand are washed in all directions through the cleaning nozzle 2;

[0066] S2. When the material passes through the position of the electromagnet 3, the volume of the material passing through is first measured by the infrared measuring instrument 18 arranged in front of the electromagnet 3, and then the magnetic strength of the electromagnet 3 is adjusted according to the volume of the material, and the material with a significantly larger volume-to-mass ratio is screened out and suction is applied to it to pick out the hollow material, so as to avoid the problem that the volume of the hollow material is much larger than that of the solid material and affects the measurement value;

[0067] S3. The screened materials enter the water pool 4 in batches through the periodic fence 6, and are then transported to the metering platform 5 through the conveyor belt 1 to measure the mass. The volume change of the liquid in the water pool 4 and the reading of the metering platform 5 are monitored by the camera to obtain the total volume and mass ratio of the material, calculate the material density, and set the material according to the density.

[0068] The method and system for collecting and storing scrap steel grades combines a visual recognition system with the measurement of metal material density for filing. On the one hand, it avoids the problems of manual filing in the prior art, which is labor-intensive, inefficient, and prone to errors. It also does not require an overly complex recognition system. By flushing and screening the materials and then measuring their volume and mass to determine their average density, the material composition can be directly filed based on the density, which is faster and more accurate than manual methods.

[0069] Furthermore, an electromagnet 3 is arranged at a certain height above the conveyor belt 1, and the volume of the passing material is measured by an infrared measuring instrument 18 arranged in front of the electromagnet 3. The magnetic strength of the electromagnet 3 is adjusted accordingly according to the volume of the material, and the hollow material is screened with a more suitable suction force to avoid a large number of gaps affecting the subsequent material density measurement.

[0070] Furthermore, the electromagnet 3 is slidably installed through a movable mounting block 9. After the electromagnet 3 absorbs the material, the mass changes. The driving power of the mounting block 9 is turned on through the mass change, and then the mounting block 9 is driven to carry the absorbed material to the outside of the conveyor belt 1. After the material leaves the electromagnet 3, the electromagnet 3 is quickly reset to achieve reuse.

[0071] Furthermore, a periodic baffle 6 is arranged in front of the water pool 4 and the metering table 5 to intercept the material transportation in batches, so that the measurement of the material volume and mass is carried out in sections to avoid confusion caused by the disorder of the materials. In addition, the baffle 603 is fixed by the turntable 602, and the turntable 602 is periodically driven by the periodic push block 604, and a stopper 23 is provided to limit the rotation angle of the turntable 602 to avoid the problem that the mass of the material on the conveyor belt 1 drives the periodic baffle 6 to rotate.

[0072] 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 system for collecting and storing scrap steel grades, comprising a conveyor belt (1) and a cleaning nozzle (2) arranged above the conveyor belt (1), wherein the scrap metal is transported to a designated location via the conveyor belt (1), and the cleaning nozzle (2) performs high-pressure washing on the scrap metal, characterized in that: An electromagnet (3) is arranged above the conveyor belt (1) to remove metal with obvious differences in mass and volume; A water pool (4) is provided at the forward end of the conveyor belt (1), a metering platform (5) is provided behind the water pool (4), and periodic fences (6) are provided above the conveyor belt (1) corresponding to the water pool (4) and the metering platform (5); The material on the conveyor belt (1) enters the water pool (4) for volume measurement, and then is weighed by the metering platform (5), and the density is determined by the mass and volume ratio. The periodic fence (6) controls the material entering the water pool (4) and the metering platform (5). The water pool (4) and the metering platform (5) are respectively provided with cameras to help monitor the mass and volume of the material in real time.

2. The system for collecting and storing scrap steel grades according to claim 1, characterized in that: A column (7) is fixedly connected to one side of the conveyor belt (1); a hinge rod (8) is hingedly provided on the side of the column (7); a mounting block (9) is slidably provided on the side of the hinge rod (8); and the electromagnet (3) is fixedly connected to the mounting block (9).

3. The system for collecting and storing scrap steel grades according to claim 2, characterized in that: A first spring (10) is fixedly connected between the mounting block (9) and the side of the hinge rod (8) away from the column (7); a pull rope (11) is fixedly connected to the other side of the mounting block (9); a roller (12) is fixedly connected to the end of the pull rope (11) away from the mounting block (9); and an electrical spring sheet (13) is provided on the lower surface of the mounting block (9) corresponding to the roller (12).

4. The system for collecting and storing scrap steel grades according to claim 2, characterized in that: A sliding block (14) is slidably arranged on the side of the mounting block (9), a second spring (15) is arranged between the mounting block (9) and the sliding block (14), and a roller (16) is arranged on the side of the sliding block (14).

5. The system for collecting and storing scrap steel grades according to claim 2, characterized in that: An extension rod (17) is vertically fixed to the side of the hinge rod (8) corresponding to the mounting block (9), and an infrared measuring instrument (18) is fixed to the lower surface of the extension rod (17). The infrared measuring instrument (18) is associated with adjusting the magnetic strength of the electromagnet (3).

6. The system for collecting and storing scrap steel grades according to claim 1, characterized in that: A guide roller (19) is arranged on the inner side of the water pool (4) corresponding to the conveyor belt (1), and a guide strip (20) is fixedly arranged at the end of the guide roller (19).

7. The system for collecting and storing scrap steel grades according to claim 1, characterized in that: The periodic baffle (6) comprises a rotating shaft (601), the rotating shaft (601) is fixedly arranged on one side of the conveyor belt (1), a rotating disc (602) is arranged on a bearing on the side of the rotating shaft (601) and located above the conveyor belt (1), a baffle (603) is fixedly connected to the side of the rotating disc (602) corresponding to the conveyor belt (1), and a periodic push block (604) is arranged above the rotating disc (602).

8. The system for collecting and storing scrap steel grades according to claim 7, characterized in that: The side of the rotating shaft (601) is fixedly connected with a slide rail (21), and the periodic push block (604) is slidably arranged above the rotating disk (602) through the slide rail (21). The upper surface of the rotating disk (602) is fixedly connected with a fixing bar (22) corresponding to the baffle (603).

9. The system for collecting and storing scrap steel grades according to claim 7, characterized in that: A stopper (23) is provided above the rotating disk (602) through a spring-tight plug connection, and a wedge block (24) is fixedly connected to the side surface of the stopper (23) corresponding to the periodic push block (604).

10. A method for detecting the grade classification of stored scrap steel, comprising the system for detecting the grade classification of stored scrap steel as described in any one of claims 1 to 9, characterized in that: The detection process is as follows: S1, the conveyor belt (1) transports the materials to the storage end in batches, and the attached mud and sand are washed in all directions through the cleaning nozzle (2); S2, when the material passes through the position of the electromagnet (3), the magnetic strength of the electromagnet (3) is controlled according to the measurement of the volume of the material, and the material with a significantly larger volume to mass ratio is screened out and picked out; S3. The screened materials are controlled to enter the water pool (4) in batches through the periodic fence (6), and then are transported to the metering platform (5) through the conveyor belt (1) to measure the mass. The volume change of the liquid in the water pool (4) and the reading of the metering platform (5) are monitored by a camera to obtain the total volume and mass ratio of the material, calculate the material density, and set the material according to the density.

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