A shot blasting machine sand shot separation and recovery device

Abstract

The application discloses a sand pellet separating and recycling device of a shot blasting machine, which comprises a shell, a shot blasting machine assembly arranged in the upper part of the shell, a shot blasting area in the upper part of the shell, a pellet backflow pipe arranged at the top of the shot blasting area, a pellet sand discharge pipe arranged at the bottom of the shot blasting area, a first separating plate and a second separating plate arranged in parallel below the shot blasting area in the shell, a third separating plate connected to the bottom of the second separating plate, first filter holes arranged on the first separating plate, second filter holes arranged on the second separating plate and the third separating plate, wherein the diameter of the first filter holes is larger than the diameter of the second filter holes, and the diameter of the first filter holes is smaller than the diameter of the pellets. The device can efficiently and completely separate the pellets, the broken pellets and the dust, so as to obtain clean and intact pellets, and can timely convey the pellets into the shot blasting machine assembly, so as to realize the reuse, save time and effort.

Description

Technical Field

[0001] This invention relates to the field of shot blasting machine technology, specifically to a shot blasting machine sand and shot separation and recovery device. Background Technology

[0002] A shot blasting machine is a casting equipment that uses high-speed shot blasting to clean or strengthen the surface of castings. Shot blasting machines can simultaneously perform sand removal, core removal, and cleaning of castings. In some regions, they are also colloquially called sandblasting machines or blasting machines. Shot blasting is a treatment technology that uses a shot blaster to propel steel shot at high speed onto the surface of a material object. Compared to other surface treatment technologies, it is faster, more efficient, and can be used for casting processes that partially retain or press the material after stamping.

[0003] During shot blasting, the impact of the shot on the surface of the object generates fragments of shot, metal oxide scale, and dust. Therefore, it is necessary to separate the shot, fragments, and dust. A search revealed a Chinese utility model patent with authorization announcement number CN207344409U, which discloses a shot separator for shot blasting equipment. During operation, shot 100 enters through the feed inlet 111 of the feed hopper 11. The rotating screw conveys the shot 100 backward to the discharge outlet 112. The shot 100 falls from the discharge outlet 112 into the storage hopper 2. After accumulating in the storage hopper 2, the shot 100 falls downward from the shot outlet 21 into the separation hopper 3. As the shot 100 falls downward, air blows from front to back, blowing the dust in the shot 100 backward. This dust enters the dust discharge hopper 35 through the gaps between the baffles 6, and the air flows out from the air outlet 33. The dust falls under its own gravity and exits from the dust discharge outlet 351 of the dust discharge hopper 35. Due to its weight and the obstruction of the baffle 6, the sand pellets 100 fall onto the buffer baffle 5 in the sand pellet bin 34. The impact force generated by the sand pellets 100 under their own weight is offset by the buffer baffle 5, causing the sand pellets 100 to accumulate on the buffer baffle 5. When the accumulation reaches a certain level, the sand pellets fall from the buffer baffle 5 onto the filter screen 4. Simultaneously, the through holes on the buffer baffle 5 and the action of the vibration generator enable the sand pellets 100 to fall from the buffer baffle 5 onto the filter screen 4 more quickly and effectively. The filter screen 4 separates the sand pellets 100; smaller ones leak out of the filter screen 4, while larger sand pellets 100 slide forward along the slope of the filter screen 4 and accumulate at the front of the filter screen 4. In this way, the sand pellets 100 are separated according to their different sizes.

[0004] However, the shot separation device in the above patent documents has the following problems: (1) The shot falls directly into the separation chamber from the shot outlet. The movement path of the shot is short. Although the dust is discharged from the air outlet through the air outlet, some dust will still fall onto the buffer baffle along with the shot, resulting in incomplete separation; (2) The shot, crushed shot, fragments, and dust are all separated in the same chamber. If only the air, buffer baffle, and filter screen are used, it is difficult to completely separate the parts, and the separation effect is not good; (3) After the shot is separated, it accumulates at the bottom of the filter screen and is finally discharged from the shot outlet. However, the separated shot cannot be used immediately for the shot blasting work in the next stage. It is necessary to manually add the shot back into the shot blasting assembly, which is time-consuming and laborious. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a shot blasting machine shot separation and recovery device to solve the problems mentioned in the above technical solutions.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A shot blasting machine shot separation and recovery device includes a housing. A shot blasting assembly is located in the upper part of the housing. The upper part of the housing is a shot blasting zone. A shot return pipe is located at the top of the shot blasting zone, and a shot discharge pipe is located at the bottom of the shot blasting zone. A first separation plate and a second separation plate are parallel to each other located below the shot blasting zone inside the housing. A third separation plate is connected to the bottom of the second separation plate. The first separation plate has a first filter hole, and the second and third separation plates have second filter holes. The diameter of the first filter hole is larger than the diameter of the second filter hole, and the diameter of the first filter hole is smaller than the diameter of the shot. A shot collection zone is formed between the first separation plate and the housing. A separation cover communicating with the shot collection zone is located on the outside of the housing. A first partition plate is connected to the lower end of the first separation plate, and a second partition plate is connected to the lower end of the separation cover. The first separation plate, the separation cover, and the... A shot hopper is formed between the first and second partitions. A pelletizing hopper is formed between the first, second, and third separation plates and the first partition. A first dust collection zone is formed between the second and third separation plates and the housing. A second dust collection zone is located below the second partition. A third filter hole is provided on the second partition, and the diameter of the third filter hole is smaller than that of the second filter hole. A vacuum cleaner is provided on one side of the housing. The air inlet of the vacuum cleaner is connected to a main pipe. A first branch pipe and a second branch pipe are connected to the main pipe. The first branch pipe communicates with the first dust collection zone, and the second branch pipe communicates with the second dust collection zone. A screw conveyor is provided at the end of the shot hopper. The feed end of the screw conveyor is connected to the shot hopper, and the discharge end of the screw conveyor is connected to a lifting mechanism that lifts the shot upwards. The discharge end of the lifting mechanism is connected to a shot return pipe.

[0008] Preferably, the shot discharge pipe has a first opening, a first baffle is slidably connected in the first opening, a third partition is connected between the shot discharge pipe and the shell, a first cylinder is provided on the upper part of the third partition, and the telescopic end of the first cylinder is connected to the first baffle.

[0009] The above technical solution involves spraying shot into the shot blasting zone through the shot blasting assembly. When the shot collides with the object, it gathers in the shot blasting zone. At this time, the first cylinder is controlled to contract, which drives the first baffle to move and opens the shot discharge pipe, so that the shot will fall into the shot collection zone.

[0010] Preferably, the top of the separation cover has a second opening, a second baffle is slidably connected in the second opening, the upper end of the second baffle is connected to a transition plate, and a second cylinder is fixed to the outside of both ends of the separation cover. The telescopic ends of the two second cylinders are respectively connected to the two ends of the transition plate.

[0011] In the above technical solution, the shot falls from the shot blasting zone onto the first separation plate and is filtered by the first filter hole to remove broken shot and dust, so that the intact shot stays on the first separation plate. After the separation is complete, the second cylinder is controlled to extend, driving the second baffle to move outward, and the shot will enter the shot chamber.

[0012] Preferably, the projectile collection area is provided with a first stirring shaft rotatably connected to the shell, the first stirring shaft is provided with a first blade, and the outer side of the shell is provided with a first motor, the first motor being connected to one end of the first stirring shaft via a coupling.

[0013] In the above technical solution, after the shot enters the shot collection area, the first motor can be controlled to drive the first stirring shaft to rotate, and the shot mixture can be stirred by the first blade to make the mixture fly, preventing it from accumulating on the first separation plate and clogging the first filter hole, so that the crushed shot and dust can enter the crushed shot chamber through the first filter hole.

[0014] Preferably, the pellet chamber is provided with a second stirring shaft rotatably connected to the shell, the second stirring shaft is provided with a second blade, and a second motor is provided on the outside of the shell. The second motor is connected to one end of the second stirring shaft through a coupling.

[0015] In the above technical solution, after the pellets enter the pellet chamber, the second motor is driven to rotate the second stirring shaft, and the pellets are stirred by the second paddle, causing the dust to fly up so that the dust can enter the first dust collection zone through the third separation plate.

[0016] Preferably, the lifting mechanism includes a vertically arranged lifting chamber with a feed inlet at its lower end, located below the discharge port of the screw conveyor. A third motor is provided on one side of the lifting chamber. The upper and lower ends of the lifting chamber are rotatably connected to a drive wheel via a shaft. A conveyor belt is connected to the drive wheel, and several hoppers are connected to the conveyor belt. The output end of the third motor is connected to the shaft of the lower drive wheel. A discharge chamber is connected to the upper end of the lifting chamber and is connected to a shot return pipe. A control valve is connected to the discharge chamber.

[0017] In the above technical solution, the complete shot that falls into the shot bin enters the screw conveyor and is then sent to the lifting bin. The operation of the third motor drives the conveyor belt to rotate, which in turn drives the hopper to rotate. The hopper conveys the shot that enters the lifting bin upwards in sequence. When it reaches the top, the hopper flips and pours the shot into the discharge bin. Finally, the shot enters the shot blasting assembly through the shot return pipe.

[0018] Preferably, a pellet collection box is provided on one side of the shell, and a pellet discharge channel communicating with the pellet bin is provided on the shell, and the pellet discharge channel is connected to the top of the pellet collection box.

[0019] In the above technical solution, the crushed pellets in the pelletizing chamber enter the pelletizing collection box through the pelletizing discharge channel.

[0020] Preferably, a straight vibrator is provided below the second partition.

[0021] In the above technical solution, after the projectile enters the projectile chamber, a small amount of dust will inevitably adhere to it. At this time, the second partition is vibrated by a straight vibrator to make the dust fly, and then the dust is discharged through the third filter hole and the second branch pipe by a vacuum cleaner, which finally removes the dust on the projectile.

[0022] Compared with the prior art, the present invention has the following beneficial effects: by setting a first separation plate, a second separation plate, a third separation plate, a first partition, and a second partition, the projectile, fragments, and dust can be separated in multiple stages to achieve efficient and thorough separation, ultimately obtaining clean and intact projectiles, and the projectiles can be promptly transported to the shot blasting assembly for reuse, saving time and effort. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a partial schematic diagram of the shell, the first separation plate, the second separation plate, and the third separation plate;

[0025] Figure 3 This is a schematic diagram of a screw conveyor and a lifting mechanism;

[0026] Figure 4To enhance the sectional view of the mechanism;

[0027] Figure 5 This is a magnified view of a portion of the second baffle.

[0028] In the diagram: 1-Shell, 2-Shot blasting assembly, 3-Shot blasting zone, 4-Shot return pipe, 5-Shot discharge pipe, 6-First separation plate, 7-Second separation plate, 8-Third separation plate, 9-First filter hole, 10-Second filter hole, 11-Shot collection area, 12-Separation hood, 13-First partition, 14-Second partition, 15-Shot chamber, 16-Scrapped shot chamber, 17-First dust collection area, 18-Second dust collection area, 19-Vacuum cleaner, 20-Main pipe, 21-First branch pipe, 2 2-Second branch pipe, 23-Screw conveyor, 24-First baffle, 25-Third partition, 26-First cylinder, 27-Second baffle, 28-Transfer plate, 29-Second cylinder, 30-First stirring shaft, 31-First motor, 32-Second stirring shaft, 33-Lifting chamber, 34-Third motor, 35-Drive wheel, 36-Conveyor belt, 37-Hopper, 38-Discharge chamber, 39-Control valve, 40-Pellet collection box, 41-Pellet discharge channel, 42-Vertical vibrator. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1 , Figure 2 and Figure 5 A shot blasting machine shot separation and recovery device includes a housing 1. A shot blasting assembly 2 is provided in the upper part of the housing 1. The upper part of the housing 1 is a shot blasting zone 3. A shot return pipe 4 is provided at the top of the shot blasting zone 3. A shot discharge pipe 5 is provided at the bottom of the shot blasting zone 3. A first opening is provided at the shot discharge pipe 5. A first baffle 24 is slidably connected in the first opening. A third partition 25 is connected between the shot discharge pipe 5 and the housing 1. A first cylinder 26 is provided on the upper part of the third partition 25. The telescopic end of the first cylinder 26 is connected to the first baffle 24. By controlling the operation of the first cylinder 26, the first baffle 24 can be moved in the first opening to open or close the shot discharge pipe 5.

[0031] Inside the housing 1, below the shot blasting zone 3, there are parallel first separation plates 6 and second separation plates 7. The bottom of the second separation plate 7 is connected to a third separation plate 8. The first separation plate 6 has a first filter hole 9, and the second separation plate 7 and the third separation plate 8 have second filter holes 10. The diameter of the first filter hole 9 is larger than the diameter of the second filter hole 10, and the diameter of the first filter hole 9 is smaller than the diameter of the shot. After an intact shot falls onto the first separation plate 6, fragments and dust fall onto the second separation plate 7 through the first filter hole 9. The fragments remain on the second separation plate 7, while the dust enters the first dust collection zone 17 through the second filter hole 10. A shot collection system is formed between the first separation plate 6 and the housing 1. The outer side of the housing 1 is provided with a separation cover 12 that communicates with the projectile collection area 11. The lower end of the first separation plate 6 is connected to a first partition 13, and the lower end of the separation cover 12 is connected to a second partition 14. A projectile compartment 15 is formed between the first separation plate 6, the separation cover 12, the first partition 13, and the second partition 14. The top of the separation cover 12 has a second opening, and a second baffle 27 is slidably connected inside the second opening. The upper end of the second baffle 27 is connected to a transition plate 28. Second cylinders 29 are fixed to the outside of both ends of the separation cover 12. The extension and retraction ends of the two second cylinders 29 are respectively connected to the two ends of the transition plate 28 to control the second cylinders 29. Extending further, the adapter plate 28 can drive the second baffle 27 to move within the second opening, connecting the projectile collection area 11 and the projectile chamber 15, allowing intact projectiles to enter the projectile chamber 15; a fragmentation chamber 16 is formed between the first separation plate 6, the second separation plate 7, the third separation plate 8 and the first partition plate 13; a first dust collection area 17 is formed between the second separation plate 7, the third separation plate 8 and the housing 1; a second dust collection area 18 is located below the second partition plate 14; a third filter hole is provided on the second partition plate 14, the diameter of which is smaller than that of the second filter hole 10. Dust can enter the second dust collection area 18 through the third filter hole, while preventing projectiles from entering, for further... To separate dust, a vibrator 42 is provided below the second partition 14. The vibration of the vibrator 42 causes the projectile to tumble, thus making the dust fly away. A vacuum cleaner 19 is provided on one side of the housing 1. The vacuum cleaner contains an exhaust fan (not shown in the attached figure). The air inlet of the vacuum cleaner 19 is connected to a main pipe 20. The main pipe 20 is connected to a first branch pipe 21 and a second branch pipe 22. The first branch pipe 21 is connected to the first suction area 17, and the second branch pipe 22 is connected to the second suction area 18. Through the operation of the vacuum cleaner, the dust in the first suction area 17 is absorbed through the first branch pipe 21, and the dust in the second suction area 18 is absorbed through the second branch pipe 22, thereby completely removing the dust from the projectile.

[0032] Please see Figure 3 and Figure 4The end of the shot magazine 15 is equipped with a screw conveyor 23. The feed end of the screw conveyor 23 is connected to the shot magazine 15, and the discharge end of the screw conveyor 23 is connected to a lifting mechanism that lifts the shot upwards. The discharge end of the lifting mechanism is connected to the shot return pipe 4. Specifically, the lifting mechanism includes a vertically arranged lifting chamber 33. The lower end of the lifting chamber 33 is provided with a feed inlet located below the discharge outlet of the screw conveyor. A third motor 34 is provided on one side of the lifting chamber 33. The upper and lower ends of the lifting chamber 33 are rotatably connected to a drive wheel 35 via a shaft. A conveyor belt 36 is connected to the drive wheel 35, and several hoppers 37 are connected to the conveyor belt 36. The output end of the third motor 34 is connected to the shaft of the lower drive wheel 35. The upper end of the lifting chamber 33 is connected to a discharge chamber 38, which is connected to the shot return pipe 4. A control valve 39 is connected to the discharge chamber 38. The complete shot that falls into the shot bin 15 enters the screw conveyor 23 and is then sent to the lifting bin 33. The operation of the third motor 34 drives the conveyor belt 36 to rotate, which in turn drives the hopper 37 to rotate. The hopper 37 conveys the shot that enters the lifting bin 33 upwards in sequence. When it reaches the top, the hopper 37 flips and pours the shot into the discharge bin 38. The control valve 39 is opened, and finally the shot enters the shot blasting assembly 2 through the shot return pipe 4.

[0033] like Figure 1 and Figure 2 As shown, to prevent the accumulation of shot, pellets, and dust on the first separation plate, a first stirring shaft 30 rotatably connected to the housing 1 is provided in the shot collection area 11. The first stirring shaft 30 is equipped with first blades, and a first motor 31 is located on the outside of the housing 1. The first motor 31 is connected to one end of the first stirring shaft 30 via a coupling. When the shot enters the shot collection area 11, the first motor 31 is activated, driving the first stirring shaft 30 to rotate. The first blades then stir the shot mixture, causing it to scatter and preventing accumulation on the first separation plate 6 and blockage of the first filter holes 9. This allows the pellets and dust to enter the pellet chamber 16 through the first filter holes 9.

[0034] To prevent pellets and dust from accumulating on the first partition, a second stirring shaft 32, rotatably connected to the housing 1, is installed inside the pellet chamber 16. The second stirring shaft 32 has second blades, and a second motor is located on the outside of the housing 1. The second motor is connected to one end of the second stirring shaft 32 via a coupling. When pellets enter the pellet chamber 16, the second motor is activated, driving the second stirring shaft 32 to rotate. The second blades stir the pellets, causing dust to disperse and enter the first dust collection zone 17 via the third separation plate 8.

[0035] A pellet collection box 40 is provided on one side of the housing 1. A pellet discharge channel 41 is provided on the housing 1 and communicates with the pellet bin 16. The pellet discharge channel 41 communicates with the top of the pellet collection box 40. The pellets in the pellet bin 16 enter the pellet collection box 40 through the pellet discharge channel 41, thereby achieving the separation of pellets.

[0036] In summary, the working principle of this invention is as follows:

[0037] Shot is sprayed into the shot blasting zone 3 through the shot blasting assembly 2. After the shot collides with the object, it gathers in the shot blasting zone 3. When the set time is reached, the first baffle 24 is opened, and the shot-grind mixture falls onto the first separating plate 6. At the same time, the first motor 31 is controlled to work, driving the first stirring shaft 30 to rotate and stir the mixture in the shot collection zone 11. The mixture is then dispersed, and the dust and broken shot are filtered out by the first filter hole 9 through the vacuum cleaner 19. This allows intact shot to remain on the first separating plate 6, while broken shot remains on the other side. Dust falls onto the second separating plate 7 and into the pellet bin 16. Dust enters the first dust collection area 17 through the second filter hole 10 and is eventually discharged. After the pellets enter the pellet bin 16, the second motor is driven to rotate the second stirring shaft 32. The second paddle stirs the pellets, causing the dust to fly. Then, the vacuum cleaner 19 sucks the dust into the first dust collection area 17 through the second filter hole 10 on the third separating plate 8 and is eventually discharged. The pellets in the pellet bin 16 enter the pellet collection box 40 through the pellet discharge channel 41.

[0038] After the fragmented shot and dust are separated, the second baffle 27 is opened, and the intact shot falls into the shot hopper 15. At this time, the dust remaining on the shot is further shaken off by the vibration of the vertical vibrator 42 and enters the second dust collection area 18 through the third filter hole on the second partition 14. Finally, it is discharged by the vacuum cleaner 19. The intact and clean shot enters the screw conveyor 23 and is sent into the lifting chamber 33. The hopper 37 conveys the shot entering the lifting chamber 33 upwards in sequence. When it reaches the top, the hopper 37 flips and pours the shot into the discharge chamber 38. Finally, it enters the shot blasting assembly 2 through the shot return pipe 4, realizing the separation of shot, fragmented shot, dust, etc., to obtain intact and clean shot for reuse.

[0039] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shot blasting machine sand shot separation and recovery device, comprising a shell (1), an upper part of the shell (1) is provided with a shot blasting machine assembly (2), the upper part of the shell (1) is a shot blasting area (3), the top of the shot blasting area (3) is provided with a shot return pipe (4), and the bottom of the shot blasting area (3) is provided with a shot sand discharge pipe (5), characterized in that, The shell (1) is provided with parallel first separation plate (6) and second separation plate (7) below the shot blasting area (3), the bottom of the second separation plate (7) is connected with the third separation plate (8), the first separation plate (6) is provided with first filter hole (9), the second separation plate (7) and the third separation plate (8) are provided with second filter hole (10), the aperture of the first filter hole (9) is larger than the aperture of the second filter hole (10), and the aperture of the first filter hole (9) is smaller than the diameter of the shot; The first separation plate (6) and the shell (1) form a shot collecting area (11), the outer side of the shell (1) is provided with a separation cover (12) in communication with the shot collecting area (11), the lower end of the first separation plate (6) is connected with the first baffle (13), the lower end of the separation cover (12) is connected with the second baffle (14), the first separation plate (6), the separation cover (12), the first baffle (13) and the second baffle (14) form a shot bin (15), the first separation plate (6), the second separation plate (7), the third separation plate (8) and the first baffle (13) form a broken shot bin (16), the second separation plate (7), the third separation plate (8) and the shell (1) form a first dust collection area (17), the lower side of the second baffle (14) is a second dust collection area (18), the second baffle (14) is provided with a third filter hole, the aperture of the third filter hole is smaller than the aperture of the second filter hole (10); One side of the shell (1) is provided with a dust collector (19), the air inlet end of the dust collector (19) is connected with a main pipe (20), the main pipe (20) is connected with a first branch pipe (21) and a second branch pipe (22), the first branch pipe (21) is in communication with the first dust collection area (17), and the second branch pipe (22) is in communication with the second dust collection area (18); The end of the shot bin (15) is provided with a screw conveyor (23), the feeding end of the screw conveyor (23) is in communication with the shot bin (15), the discharging end of the screw conveyor (23) is connected with a lifting mechanism for lifting the shot upward, and the discharging end of the lifting mechanism is connected with the shot return pipe (4); The shot sand discharge pipe (5) is provided with a first opening, the first opening is slidably connected with a first baffle (24), and the third baffle (25) is connected between the shot sand discharge pipe (5) and the shell (1), the upper part of the third baffle (25) is provided with a first cylinder (26), and the telescopic end of the first cylinder (26) is connected with the first baffle (24); The top of the separation cover (12) is provided with a second opening, the second opening is slidably connected with a second baffle (27), the upper end of the second baffle (27) is connected with an adapter plate (28), the outer sides of the two ends of the separation cover (12) are fixedly connected with second cylinders (29), and the telescopic ends of the two second cylinders (29) are respectively connected with the two ends of the adapter plate (28).

2. The shot separation and recovery device of the shot blasting machine according to claim 1, characterized in that: The pellet collecting area (11) is internally provided with a first stirring shaft (30) rotatably connected with the shell (1), the first stirring shaft (30) is provided with a first paddle, the outer side of the shell (1) is provided with a first motor (31), and the first motor (31) is in driving connection with one end of the first stirring shaft (30) through a shaft coupling.

3. The shot separation and recovery device of the shot blasting machine according to claim 2, characterized in that: The broken pellet bin (16) is internally provided with a second stirring shaft (32) rotatably connected with the shell (1), the second stirring shaft (32) is provided with a second paddle, the outer side of the shell (1) is provided with a second motor, and the second motor is in driving connection with one end of the second stirring shaft (32) through a shaft coupling.

4. The shot separation and recovery device of the shot blasting machine according to claim 3, characterized in that: The lifting mechanism comprises a vertically arranged lifting bin (33), the lower end of the lifting bin (33) is provided with a feeding port, the feeding port is located below the discharge port of the screw conveyor, one side of the lifting bin (33) is provided with a third motor (34), the upper and lower ends in the lifting bin (33) are rotatably connected with a transmission wheel (35) through a shaft, the transmission wheel (35) is connected with a conveying belt (36), the conveying belt (36) is connected with a plurality of hoppers (37), the output end of the third motor (34) is connected with the shaft of the lower transmission wheel (35), the upper end of the lifting bin (33) is connected with a discharge bin (38), the discharge bin (38) is connected with the pellet return pipe (4), and the discharge bin (38) is connected with a control valve (39).

5. The shot separation and recovery device of the shot blasting machine according to claim 4, characterized in that: One side of the shell (1) is provided with a broken pellet collecting box (40), the shell (1) is provided with a broken pellet discharge channel (41) in communication with the broken pellet bin (16), and the broken pellet discharge channel (41) is in communication with the top of the broken pellet collecting box (40).

6. The shot separation and recovery device of the shot blasting machine according to claim 5, characterized in that: The second partition plate (14) is provided below with a straight vibrator (42).

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