A slag pellet multiple fine screening separation device

Abstract

The present invention discloses a slag-shot multiple fine screening separation device, comprising a machine body and a plurality of filter plates arranged inside the machine body, wherein the upper and lower filter plates are used to perform multiple separations on the residues in the slag-shot, wherein a conveyor belt is also arranged below the filter plate, and the rotating shaft is installed in the machine body through the driving rotation of a motor, and a guide block whose arc-shaped inner wall is cocentric with the rotating shaft is also fixed on the inner surface of the machine body. The slag-shot multiple fine screening separation device can effectively improve the screening efficiency of solid materials while ensuring the structural strength and durability of the filter plates by allowing multiple groups of filter plates to reciprocate, and can generate driving force to dredge and remove dust from the slag-shot on the filter plates during the reciprocating deflection, without the need for complex electric control equipment, and is more in line with the use environment requirements of the slag-shot filtering and screening device, and can fully discharge the slag with similar specifications to the slag-shot, and the screening and separation effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of mutual separation of solid objects, in particular to a slag-shot separation device used in a shot blasting machine, specifically to a slag-shot multiple fine screen separation device. Background Art

[0002] After a single operation is completed, the slag shot will enter the separator in batches along with impurities and dust. The main working content of this type of screening separator is to separate the solid mixture of slag shot and waste residue so that the slag shot can be returned to the shot blasting work. For example, in the prior art, a slag shot magnetic separation device for a shot blasting machine and a shot blasting machine with announcement number CN115463839B include a separation mechanism and a magnetic separation mechanism. The separation mechanism includes a separation chamber, a feed port and a discharge port. The feed port is connected to the steel shot outlet. A plurality of filter bridges are arranged in the separation chamber. Each filter bridge has at least two plastic guide rails. The distance between two adjacent plastic guide rails is less than the diameter of the steel shot. One end of the filter bridge is connected to the feed port to form a first end, and the other end of the filter bridge is connected to the discharge port to form a second end. A material collecting piece is arranged on the lower side of the filter bridge. The magnetic separation mechanism is arranged on the lower side of the material collecting piece. The magnetic separation mechanism includes a magnetic separator. The magnetic separator can move along the extension direction of the filter bridge. In a first state, the magnetic separator is at a first height. At the first height, the magnetic separator provides magnetic force to the steel shot, and the magnetic separator moves from the first end to the second end. In a second state, the magnetic separator is at a second height. At the second height, the magnetic separator stops providing magnetic force to the steel shot, and the magnetic separator moves from the second end to the first end.

[0003] Another example is a slag shot screening device and a shot blasting machine with publication number CN116586279A, the slag shot screening device comprising a casing, a support frame, a screening mechanism, a vibrating mechanism and a control mechanism; the casing is fixedly mounted with a support frame; the screening mechanism is fixedly mounted below the support frame; the vibrating mechanism is fixedly mounted above the support frame; the screening mechanism is electrically connected to the control mechanism; the present invention solves the problem that the existing shot blasting machine cannot completely clean and separate the slag remaining on the outer surface of the steel shot during use, and some larger slag will be mixed in the steel shot and cannot be completely separated, resulting in incomplete separation of the steel shot and the slag, and low separation efficiency, and realizes the cleaning of the slag on the outer surface of the steel shot and the separation of larger slag, so that the steel shot and the slag are separated more thoroughly, and the separation efficiency is greatly improved;

[0004] The above-mentioned existing technologies all utilize solid screening technology to filter the residue in the slag balls. However, the premise for ensuring the filtering effect is to increase the movement dimension of the slag balls, such as increasing the vibration intensity or screening by rotating circular filtration. Although such means can achieve relatively good screening effects, the weight of the batch of slag balls is relatively large. The use of the above-mentioned means will lead to a reduction in the durability of the screening mechanism itself, which is not conducive to long-term use. Summary of the invention

[0005] The object of the present invention is to provide a slag ball multiple fine screening separation equipment to solve the problem that the existing technology proposed in the above background technology all uses solid screening technology to filter the residue in the slag ball, but the premise for ensuring the filtering effect is to increase the movement dimension of the slag ball, such as increasing the vibration intensity or screening by rotating circular filtration. Although such means can achieve relatively good screening effects, the weight of the batch of slag balls is large. The use of the above means will lead to a reduction in the durability of the screening mechanism itself, which is not conducive to long-term use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a slag shot multiple fine screening separation device, comprising a machine body and a plurality of filter plates arranged inside the machine body, wherein the upper and lower filter plates are used to perform multiple separations on the residue in the slag shot, wherein a conveyor belt is also arranged below the filter plate, and the conveyor belt installed on the roller is used to deliver the slag shot out of the machine body, the center of the filter plate is penetrated by a rotating shaft, and the rotating shaft is installed in the machine body by being driven by a motor, and a guide block with an arc-shaped inner wall cocentric with the rotating shaft is fixed on the inner surface of the machine body.

[0007] As a further feature, the separation device further comprises a cleaning mechanism, wherein the cleaning mechanism comprises a guide frame arranged parallel to the conveyor belt and a through hole opened on the conveyor belt;

[0008] As a further feature, the conveyor belt is inclined, and a plate structure is provided below the filter plate to guide the falling slag pellets to the top of the conveyor belt;

[0009] As a further feature, the through hole is connected to an airflow mechanism, and the airflow mechanism inputs airflow in a single direction and respectively adsorbs and removes impurities on the conveyor belt through the through hole.

[0010] As a further feature, the guide frame includes a bar with arc-shaped structures on both left and right sides, a baffle bar away from the conveyor belt and used to prevent the slag balls from moving up with the conveyor belt is installed at the top of the bar, and a guide bar is fixed at the bottom of the bar to guide the slag balls out of the machine body.

[0011] As a further feature, each group of the airflow mechanism comprises two covers symmetrically distributed up and down, wherein the covers are used to cover each group of through holes on the vertical plane from the inner surface of the conveyor belt;

[0012] As a further feature, two upper and lower adjacent cover bodies are connected to each other through a vertical pipe, and are also fixed in the equipment housing of the conveyor belt through the vertical pipe.

[0013] Furthermore, the side of the vertical pipe is connected to the inclined branch section of the air supply pipe, the bottom end of the branch section is inclined towards the bottom end of the vertical pipe, and the top end of the branch section is inclined away from the top end of the vertical pipe. The air supply pipe is connected to an air supply mechanism, wherein the air supply mechanism generates airflow through the operation of a conveyor belt and transports it to the air supply pipe.

[0014] As a further feature, the air supply mechanism includes a shell and an impeller arranged in the shell, the rotatable shaft structure on which the impeller is mounted is connected to a roller via two mutually meshing gears, and the output end of the space where the impeller is located is connected to the input end of the air supply pipe.

[0015] Furthermore, the outer surface of the conveyor belt is also inlaid with a soft magnetic sheet, wherein the soft magnetic sheet is used to absorb metal residues of similar or smaller volume than the slag shot, and is transported to the bottom of the conveyor belt as the conveyor belt runs and is blown away by the through holes.

[0016] Furthermore, the separation device also includes an evacuation mechanism, wherein the evacuation mechanism is used to guide and clear the material on the filter plate, and the evacuation mechanism includes an evacuation bar and a driving mechanism for pulling the evacuation bar to move back and forth on the rotatable filter plate, wherein the evacuation bar is divided into a rigid section and a tough section that are connected to each other, wherein the rigid section is connected to the driving mechanism, and the lower half of the tough section is slidably connected to the lower end surface of the filter plate.

[0017] As a further feature, the upper and lower filter plates are respectively used for coarse filtration and fine filtration of the slag balls, and the evacuation mechanism is located on the filter plate for fine filtration.

[0018] As a further feature, the driving mechanism comprises a cylinder whose bottom end is movably mounted on the side wall of the machine body, wherein a rod is elastically and slidably mounted vertically on the axis of the cylinder, and the top of the rod is connected to the filter plate on the upper layer, wherein the bottom end of the rod is also connected to the plate, and the internal space of the cylinder below the plate has a one-way flow input end and an output end respectively;

[0019] As a further feature, the output end is connected to the waste pipe, and the output end is connected to the internal hollow structure of the evacuation strip, and the surface of the evacuation strip is provided with a suction hole connected to the internal hollow structure, and the edge of the plate body is in contact with the inner wall of the cylinder body, and the internal space of the cylinder body above the plate body is a non-enclosed setting;

[0020] As a further feature, a vibration plate which is also fixed in the rod body is also arranged above the plate body. When the vibration plate moves along the axis following the rod body, its edge collides with a sphere arranged on the inner wall of the cylinder to generate vibration.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the slag-shot multiple fine screening separation equipment adopts a new structural design, and by allowing multiple groups of filter plates to reciprocate and deflect, while ensuring the structural strength and durability of the filter plates, the screening efficiency of solid materials can be effectively improved, and at the same time, a driving force can be generated during the reciprocating deflection to dredge and remove dust from the slag-shot on the filter plates, without the need to use complex electric control equipment, and more in line with the use environment requirements of the slag-shot filtering and screening equipment, and at the same time, slag with similar specifications to the slag-shot can be fully discharged, and the screening and separation effect is better, as shown in the following content;

[0022] 1. The structural design of the filter plate, the shaft and the guide block enables the filter plate to rotate along the axis of the shaft under the guidance of the motor and the shaft, thereby utilizing the relatively gentle reciprocating deflection motion of the filter plate to improve the screening efficiency of the slag and pellets while ensuring the durability of the filter plate. The design is reasonable and the screening effect is better. At the same time, the use of the guide block can also make the specific internal structure more in line with the movement trajectory of the filter plate, and can also prevent the slag and pellets from falling directly from the rotating gap;

[0023] 2. The design and use of structures such as bars can guide the sieved slag balls to fall and roll, and at the same time, with the inclined conveyor belt, the slag balls can roll downward, while the slag with similar specifications to the slag balls cannot roll and is transported upward by the conveyor belt and finally falls downward in another direction;

[0024] Furthermore, the use of through holes and soft magnetic sheets can, on the one hand, adsorb metal slag through the soft magnetic sheets, and on the other hand, can utilize the guidance of the airflow in the cover body to allow the slag and dust in the working area on the upper surface of the conveyor belt to be sucked into the cover body by the through holes, and the venturi structure composed of the air supply pipe and the vertical pipe enables the bottom of the same set of covers to spray out the airflow containing dust, thereby also being able to blow off the slag adsorbed on the soft magnetic sheet, and even if the slag is not blown off, it will fall off under the blocking of the guide strip on the conveyor belt surface at the bottom end of the blocking rod, which is more practical and convenient;

[0025] 3. The design of the driving mechanism composed of the cylinder and the rod enables the telescopic structure composed of the two to swing synchronously with the swing of the filter plate, thereby driving the tough section of the evacuation strip to move back and forth on the surface of the filter plate, thereby cooperating with the swing of the filter plate to effectively prevent and evacuate the mixed form of slag and slag above it;

[0026] Furthermore, the structural design of the plate body and the vibration plate enables the mutual movement between the rod body and the cylinder body to produce an airflow-like negative pressure conveying effect to process the slag and dust on the filter plate, while the vibration plate can generate a vibration force through collision and contact with the sphere during movement, thereby further improving the solid filtration and screening effect of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the machine body according to the first embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the conveyor belt of the present invention;

[0030] Figure 4 This is a schematic diagram of the bar distribution structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the distribution structure of the soft magnetic sheet of the present invention;

[0032] Figure 6 This is a schematic diagram of the cover body distribution structure of the present invention;

[0033] Figure 7 It is a schematic diagram of the connecting structure of the air supply pipe and the vertical pipe of the present invention;

[0034] Figure 8 This is a schematic diagram of the gear distribution structure of the present invention;

[0035] Fig. 9 A schematic diagram of the internal structure of a machine body according to a second embodiment of the present invention;

[0036] Fig.10 For the present invention Fig. 9 Schematic diagram of the cylinder distribution structure in FIG.

[0037] Fig.11 It is a schematic diagram of the internal structure of the cylinder of the present invention.

[0038] In the figure: 1. body; 2. filter plate; 3. conveyor belt; 4. roller; 5. rotating shaft; 6. guide block; 7. bar; 8. stop bar; 9. guide bar; 10. through hole; 11. soft magnetic sheet; 12. cover; 13. vertical pipe; 14. air supply pipe; 15. outer shell; 16. impeller; 17. gear; 18. evacuation strip; 19. cylinder; 20. rod body; 21. waste discharge pipe; 22. suction hole; 23. plate body; 24. vibration plate; 25. sphere. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0040] See also Figure 1-Figure 11 , the present invention provides the following technical solutions:

[0041] Embodiment 1: In order to solve the problems existing in the prior art, this solution includes a machine body 1 and a multi-layer filter plate 2 arranged inside the machine body 1. The upper and lower filter plates 2 are used to perform multiple separations on the residue in the slag pellets, wherein a conveyor belt 3 is also arranged below the filter plate 2, and the conveyor belt 3 installed on the roller 4 is used to send the slag pellets out of the machine body 1. The center of the filter plate 2 is penetrated by a rotating shaft 5, and the rotating shaft 5 is rotatably installed in the machine body 1 through the drive of a motor, and a guide block 6 whose arc-shaped inner wall is concentric with the rotating shaft 5 is also fixed on the inner surface of the machine body 1, such as Figure 1 and Figure 2 As shown, after the work is completed, the slag balls enter the body 1 through the top opening and first fall on the upper filter plate 2, and then enter the working space of the lower filter plate 2 after passing through the upper filter plate 2. After being separated by multiple fine screens, the slag balls will fall again. In this process, the motor drives the shaft 5 to rotate, thereby driving the filter plate 2 to deflect back and forth between the guide blocks 6. During the deflection process, the slag balls can not only pass through the filter holes on the filter plate 2, but also roll back and forth on the upper surface of the filter plate 2, so that it can not only filter efficiently, but also avoid clogging.

[0042] The specifications of the slag balls are fixed, but the specifications of the debris generated by the impact of the slag balls are relatively variable. Slag that is too large or too small will be fully screened, while slag with similar specifications to the slag balls will easily pass through the filter holes together with the slag balls, resulting in poor screening effect. Especially when the slag is also made of metal materials, the screening effect of using a single magnetic suction is even worse. Therefore, in order to solve this problem, the present embodiment discloses the following method: Figure 3-Figure 5As shown, the separation device also includes a cleaning mechanism, wherein the cleaning mechanism includes a guide frame arranged in parallel above the conveyor belt 3 and a through hole 10 opened on the conveyor belt 3, the conveyor belt 3 is inclined, and a plate structure for guiding the falling slag balls to the top of the conveyor belt 3 is arranged below the filter plate 2, and the through hole 10 is connected to the airflow mechanism, and the airflow mechanism inputs airflow in a single direction and adsorbs and removes impurities on the conveyor belt 3 through the through hole 10, the guide frame includes a bar 7 with arc-shaped structures on both left and right sides, a baffle 8 away from the conveyor belt 3 and used to prevent the slag balls from moving up with the conveyor belt 3 is installed on the top of the bar 7, and a guide bar 9 for guiding the slag balls to be discharged from the machine body 1 is fixed to the bottom of the bar 7, and the conveyor The outer surface of the belt 3 is also inlaid with a soft magnetic sheet 11, wherein the soft magnetic sheet 11 is used to absorb metal residues of similar or smaller volume than the slag shot, and is transported to the bottom of the conveyor belt 3 along with the operation of the conveyor belt 3 and blown away by the through hole 10. Under the guidance of the plate structure below the filter plate 2, the slag shot after passing through each layer of the filter plate 2 will carry slag of similar specifications and fall onto the inclined conveyor belt 3. Since the slag shot itself has a relatively regular shape and a higher rolling effect, the slag shot will roll downward in an orderly manner along the inclined direction of the conveyor belt 3 and under the guidance of the bar 7 and leave the separation equipment, while the slag with poor rolling effect is easy to stay on the surface of the conveyor belt 3 and be transported upward and then fall. The use of the soft magnetic sheet 11 is to ensure that the slag will not be discharged by the slag shot.

[0043] In order to further improve the above solution, the following solution is also disclosed in this embodiment, and the specific solution can be referred to Figure 6-Figure 8Each group of air flow mechanisms includes two covers 12 symmetrically distributed in the upper and lower parts, wherein the covers 12 are used to cover each group of through holes 10 on the vertical plane from the inner surface of the conveyor belt 3, and the two adjacent covers 12 in the upper and lower parts are connected by a vertical pipe 13, and are also fixed in the equipment housing of the conveyor belt 3 by the vertical pipe 13. The side of the vertical pipe 13 is connected to the inclined branch section of the air supply pipe 14, and the bottom end of the branch section is inclined in the direction close to the bottom end of the vertical pipe 13, and the top end of the branch section is inclined in the direction away from the top end of the vertical pipe 13. The air supply pipe 14 is connected to the air supply mechanism, wherein the air supply mechanism generates airflow through the operation of the conveyor belt 3 and transports it to the air supply pipe 14. The air supply mechanism includes a shell 15 and an impeller 16 arranged in the shell 15. The rotatable shaft structure on which the impeller 16 is installed is connected to the roller 4 through two mutually meshing gears 17, and the impeller 1 The output end of the space where 6 is located is connected to the input end of the air supply pipe 14. The operation of the conveyor belt 3 depends on the drive of the motor and the rotation of the roller 4. When the roller 4 rotates, it can also drive the impeller 16 to rotate through two mutually meshing gears 17. Therefore, when the impeller 16 rotates at a high speed in the shell 15, an air flow conveying effect will be generated. The generated air flow will enter the air supply pipe 14 and blow into the vertical pipe 13 along a certain inclination angle, and form a pipeline structure of the Venturi principle. At this time, the upper cover body 12 will be in a negative pressure state, and the lower cover body 12 will blow the upper air flow downward. In this process, the negative pressure airflow generated by the upper cover body 12 will vacuum and adsorb the undischarged slag balls, and the airflow blown out by the lower cover body 12 will blow away the slag adsorbed by the soft magnetic sheet 11 through the through hole 10, thereby achieving a better screening effect.

[0044] Embodiment 2: This embodiment actually discloses another impurity removal mechanism, which is an evacuation mechanism used in the working space of the filter plate 2. It can be used independently of the above scheme or in combination with each other. For details, please refer to Figure 9-11The separation device also includes an evacuation mechanism, wherein the evacuation mechanism is used to guide and dredge the materials on the filter plate 2, and the evacuation mechanism includes an evacuation strip 18 and a driving mechanism for pulling the evacuation strip 18 to move back and forth on the rotatable filter plate 2, wherein the evacuation strip 18 is divided into a rigid section and a tough section connected to each other, wherein the rigid section is connected to the driving mechanism, and the lower half of the tough section is slidably connected to the lower end surface of the filter plate 2, and the upper and lower filter plates 2 are respectively used for coarse filtration and fine filtration of the slag and pills, and the evacuation mechanism is located on the filter plate 2 for fine filtration. In this scheme, the tough section of the evacuation strip 18 is slidably connected to the upper surface of the filter plate 2 by existing means such as a slip ring, and the reason for using a rubber-like Or a tough structure of metal material, rather than a flexible structure, is to enable the evacuation strip 18 to be bent by the rotating filter plate 2 and to be pushed or pulled by the force to slide back and forth on the filter plate 2. Therefore, in this process, the slag pellets that have not fallen will be evacuated by the moving evacuation strip 18, thereby improving the screening efficiency. The power source is composed of a cylinder 19 and a rod 20 that form a telescopic connection relationship. The bottom end of the combined structure is rotatably connected to the side wall of the machine body 1, and the top end is rotatably installed on the lower end surface of the filter plate 2. Therefore, the deflection of the filter plate 2 will drive the combined structure to move during telescoping, thereby producing a pulling effect on the evacuation strip 18.

[0045] In this scheme, the composition of the above-mentioned driving mechanism is further refined, and the corresponding functions are also expanded. The functions are mainly reflected in the use of the mutual telescopic sliding of the structure in the driving mechanism to realize dust extraction and generate vibration force to improve the screening effect. For details, please refer to Figure 10-11The driving mechanism includes a cylinder 19 whose bottom end is movably mounted on the side wall of the machine body 1, wherein a rod 20 is elastically and slidably mounted vertically at the axis of the cylinder 19, and the top of the rod 20 is connected to the filter plate 2 on the upper layer, wherein the bottom end of the rod 20 is also connected to a plate 23, and the internal space of the cylinder 19 below the plate 23 has an input end and an output end for one-way flow, wherein the output end is connected to a waste discharge pipe 21, and the output end is connected to the internal hollow structure of the evacuation strip 18, and at the same time, a suction hole 22 connected to the internal hollow structure is provided on the surface of the evacuation strip 18, and the edge of the plate 23 is in contact with the inner wall of the cylinder 19, while the internal space of the cylinder 19 above the plate 23 is not closed; at the same time, a vibration plate 24 which is also fixed in the rod 20 is also arranged above the plate 23, and when the vibration plate 24 moves along the axis with the rod 20, its edge is in contact with the inner wall of the cylinder 19. The collision and contact of the sphere 25 generates vibration. During the reciprocating movement of the rod body 20, the plate body 23 will first move back and forth synchronously inside the cylinder 19. When it moves upward, the internal space of the cylinder 19 below the plate body 23 is in a negative pressure state, and the evacuation strip 18 has a hollow structure inside and is connected to the one-way input end of the internal space of the cylinder 19. Therefore, the evacuation strip 18 will break up the dust when clearing the slag balls and guide the dust airflow into the cylinder 19 through the suction holes 22 opened on its surface. When the plate body 23 moves downward, the dust-containing airflow will be discharged through the exhaust pipe 21, so as to achieve a more thorough cleaning of the dust on the surface of the slag balls. In this process, the vibration plate 24 will also move simultaneously with the rod body 20, and use the collision and contact between the side of the vibration plate 24 and the sphere 25 to generate vibration, thereby transmitting the vibration force to the evacuation strip 18 and the filter plate 2, which has a better auxiliary cleaning effect.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slag pellet multiple fine screening separation device, comprising a machine body (1) and a plurality of filter plates (2) arranged inside the machine body (1), wherein the upper and lower filter plates (2) are used to perform multiple separations on the residue in the slag pellets, wherein a conveyor belt (3) is further arranged below the filter plates (2), the conveyor belt (3) being mounted on a rotating roller (4), and the conveyor belt (3) being used to convey the slag pellets out of the machine body (1), wherein the device is characterized in that: The center of the filter plate (2) is penetrated by a rotating shaft (5), and the rotating shaft (5) is rotatably installed in the machine body (1) by being driven by a motor, and a guide block (6) having an arc-shaped inner wall and the same center as the rotating shaft (5) is fixed on the inner surface of the machine body (1); The separation device further comprises a cleaning mechanism, wherein the cleaning mechanism comprises a guide frame arranged parallel to the conveyor belt (3) and a through hole (10) provided on the conveyor belt (3), the conveyor belt (3) is inclined, and a plate structure is provided below the filter plate (2) for guiding the falling slag pellets to the top of the conveyor belt (3), and the through hole (10) is connected to the airflow mechanism, and the airflow mechanism inputs airflow in a single direction and respectively adsorbs and removes impurities on the conveyor belt (3) through the through hole (10); The guide frame comprises a bar (7) with arc-shaped structures on both left and right sides, a blocking bar (8) is installed at the top of the bar (7) away from the conveyor belt (3) and used to prevent the slag balls from moving up along with the conveyor belt (3), and a guide bar (9) is fixed at the bottom of the bar (7) for guiding the slag balls to be discharged from the machine body (1); Each group of the airflow mechanism comprises two covers (12) symmetrically distributed in the upper and lower parts, wherein the covers (12) are used to cover each group of through holes (10) on the vertical plane from the inner surface of the conveyor belt (3), and the two upper and lower adjacent covers (12) are connected by a vertical pipe (13), and are also fixed in the equipment housing of the conveyor belt (3) by the vertical pipe (13); The side of the vertical pipe (13) is connected to the inclined branch section of the air supply pipe (14), the bottom end of the branch section is inclined in a direction close to the bottom end of the vertical pipe (13), and the top end of the branch section is inclined in a direction away from the top end of the vertical pipe (13), and the air supply pipe (14) is connected to an air supply mechanism, wherein the air supply mechanism generates airflow through the operation of the conveyor belt (3) and transports the air to the air supply pipe (14); The air supply mechanism comprises a housing (15) and an impeller (16) arranged in the housing (15); a rotatable shaft structure on which the impeller (16) is mounted is connected to a rotating roller (4) via two mutually meshing gears (17); and an output end of a space in which the impeller (16) is located is connected to an input end of an air supply pipe (14).

2. The slag shot multiple fine screening separation equipment according to claim 1 is characterized by: The outer surface of the conveyor belt (3) is also inlaid with a soft magnetic sheet (11), wherein the soft magnetic sheet (11) is used to absorb metal residues of a similar or smaller volume than the slag shot, and is transported to the bottom of the conveyor belt (3) as the conveyor belt (3) rotates and is blown away by the through hole (10).

3. The slag shot multiple fine screening separation equipment according to claim 1 is characterized by: The separation device further comprises an evacuation mechanism, wherein the evacuation mechanism is used to guide and clear the material on the filter plate (2), wherein the evacuation mechanism comprises an evacuation bar (18) and a driving mechanism for pulling the evacuation bar (18) to move back and forth on the rotatable filter plate (2), wherein the evacuation bar (18) is divided into a rigid section and a tough section which are connected to each other, wherein the rigid section is connected to the driving mechanism, and the lower half of the tough section is slidably connected to the lower end surface of the filter plate (2).

4. The slag shot multiple fine screening separation equipment according to claim 3 is characterized by: The upper and lower filter plates (2) are respectively used for coarse filtration and fine filtration of the slag pellets, and the evacuation mechanism is located on the filter plate (2) for fine filtration.

5. The slag shot multiple fine screening separation equipment according to claim 4 is characterized by: The driving mechanism comprises a cylinder (19) whose bottom end is movably mounted on the side wall of the machine body (1), wherein a rod (20) is elastically slidably mounted vertically on the axis of the cylinder (19), and the top end of the rod (20) is connected to the filter plate (2) on the upper layer, wherein the bottom end of the rod (20) is also connected to a plate (23), and the internal space of the cylinder (19) below the plate (23) has an input end and an output end for one-way flow, wherein the output end is connected to a waste discharge pipe (21), and the output end is connected to the internal hollow structure of the evacuation strip (18), and at the same time, a suction hole (22) connected to the internal hollow structure is opened on the surface of the evacuation strip (18), and the edge of the plate (23) is in contact with the inner wall of the cylinder (19), and the internal space of the cylinder (19) above the plate (23) is non-enclosed; At the same time, a vibration plate (24) which is also fixed in the rod body (20) is also arranged above the plate body (23). When the vibration plate (24) moves along the axis following the rod body (20), its edge collides with a sphere (25) arranged on the inner wall of the cylinder body (19) to generate vibration.

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