Shot blasting machine for polishing surface of steel structure workpiece

Abstract

The utility model discloses a shot blasting machine for polishing the surface of a steel structure workpiece, which comprises a shot blasting machine main body adopting a hanging type structure, the shot blasting machine main body comprises a shot blasting chamber, an electric hoist is arranged above the shot blasting chamber, a plurality of groups of shot blasting devices and a conveying mechanism are arranged in the shot blasting chamber, the conveying mechanism is connected with the bottom of the shot blasting chamber and the shot blasting devices and is used for conveying shots, the head end of a rope on the electric hoist is connected with a fixed seat, a rope hook is arranged below the fixed seat, and the rope hook is connected with the bottom of the shot blasting chamber. And the rope hook is driven to rotate by a driving component arranged above the fixed seat. Compared with a traditional shot blasting machine of a hanging type structure, the shot blasting machine has the advantages that the driving part is additionally arranged on the electric hoist main body, on one hand, the driving part can avoid the autorotation phenomenon of a casting hung on the driving part in the shot blasting chamber in the cleaning process of the shot blasting machine, and on the other hand, under the stable driving of the driving part, the shot blasting effect is good. And castings can stably rotate, it is guaranteed that the smoothness of the surfaces of the castings is more uniform, and the cleaning effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shot blasting machines, in particular to a shot blasting machine for grinding the surface of a steel workpiece. Background Art

[0002] Shot blasting machine, also known as sandblasting machine or sandblasting machine, refers to a casting equipment that uses high-speed projectiles thrown by the shot blaster to clean or strengthen the surface of castings. It can simultaneously perform operations such as sand removal, core removal and cleaning on castings. It is a surface treatment technology for material objects. Compared with other surface treatment technologies, it is faster and more effective, and can be used for the casting process after partial retention or stamping. It is widely used in the foundry industry to remove sand and oxide scale on the surface of cast steel and cast iron parts.

[0003] At present, the common shot blasting machines in the prior art are divided into drum type, chain plate type, turntable type, trolley type, squirrel cage type and hanging type shot blasting machines according to the different structures of the casting carrier. Among them, the drum type and chain plate type shot blasting machines are suitable for cleaning small and medium-sized castings that are not afraid of collision. The drum type shot blasting machine relies on the spiral guide ribs in the cylinder to turn the casting over and move forward, and the chain plate type shot blasting machine turns the casting over and runs through the movement of the chain plate; and for medium and large castings such as steel workpieces, turntable type, trolley type and hanging type shot blasting machines are commonly used. Among them, the hanging shot blasting machine is a type of common shot blasting machine. The casting to be cleaned is usually hung on the hook through an electric hoist device and moved to the shot blasting room for surface Grinding, polishing and cleaning operations, and although the hook structure on the common electric hoist device has good bearing capacity, it is often unable to well control the rotation of the casting suspended thereon, which causes the casting in the shot blasting chamber to easily rotate during the cleaning process through the polisher. Although this self-rotation phenomenon is convenient for cleaning different positions of the casting surface with the shot blasting machines arranged in the shot blasting chamber, due to the irregularity of this self-rotation phenomenon, it is easy to make the surface smoothness of the casting after cleaning uneven, and the cleaning effect is not ideal. At the same time, the shot blasting machines arranged at the corresponding positions in the shot blasting chamber also increase unnecessary use costs and energy consumption. Utility Model Content

[0004] The utility model aims to provide a shot blasting machine for grinding the surface of a steel workpiece, which can avoid the self-rotation phenomenon generated by the casting during the cleaning process and further improve the cleaning effect of the casting surface.

[0005] The technical solution adopted by the utility model to solve the above problems is:

[0006] A shot blasting machine for grinding the surface of a steel workpiece comprises a shot blasting machine body with a hanging structure, the shot blasting machine body comprises a shot blasting chamber, an electric hoist arranged above the shot blasting chamber, a plurality of shot blasting devices arranged in the shot blasting chamber, and a conveying mechanism for conveying projectiles connected to the bottom of the shot blasting chamber and the shot blasting devices, the head end of the rope on the electric hoist is connected to a fixed seat, a rope hook is arranged below the fixed seat, and the rope hook is driven to rotate by a driving component arranged above the fixed seat.

[0007] Furthermore: the main body of the electric hoist is composed of a double-drum structure, and the two groups of ropes wound on the double drum are respectively connected to the reels rotatably arranged on both sides of the driving component above the fixed seat.

[0008] Further: the rope hook rotatably arranged below the fixing seat is installed on the fixing seat through a detachable structure, and a toothed disc is arranged at the top connection position of the rope hook below the fixing seat.

[0009] Furthermore: the shot blasting machines in the shot blasting chamber are arranged in two groups and are arranged at a certain angle relative to the size of the shot blasting chamber.

[0010] Further: the conveying mechanism includes a second driving component and a conveying chain, the bottom of the shot blasting chamber is provided with a hopper-shaped and rotatable material guide screw, the second driving component is placed on the top of the conveying channel provided on the outside of the shot blasting chamber and is connected to the material guide screw at the bottom of the shot blasting chamber through the conveying chain in the conveying channel and driven to rotate, a plurality of feeding hoppers are evenly distributed on the conveying chain in the conveying channel, the feeding hoppers are fixed on the chain links of the conveying chain, a feeding chamber is provided on the top of the conveying channel, and the feeding chamber is connected to the corresponding multiple groups of shot blasters in the shot blasting chamber through multiple groups of feeding pipes provided at the bottom.

[0011] Furthermore: a separation chamber for removing impurities from the projectiles is also provided in the feed chamber at the top of the conveying channel, a separator is provided inside the separation chamber and an ash outlet is provided at the bottom.

[0012] Furthermore: a dust removal component is also connected to the conveying channel of the shot blasting chamber.

[0013] Further: the dust removal assembly includes a first dust removal part and a second dust removal part, the first dust removal part and the second dust removal part are connected to the conveying channel through an air duct, the first dust removal part includes a dust removal cyclone body and a ash hopper connected thereto below, the second dust removal part includes a second dust collector, the second dust collector is connected to the dust removal cyclone body through an air duct, the second dust collector is provided with an exhaust port on the top and is connected to a fan, a hopper-shaped discharge port is provided on the bottom and a plurality of filter cartridges are distributed inside, the top of the filter cartridge is connected to a plurality of groups of pulse spray valves adapted to be provided on the outside of the second dust collector through an air pipe, the plurality of groups of pulse spray valves are connected to each other through an air storage tank provided at the bottom and are fixed to corresponding positions on the outside of the second dust collector.

[0014] Furthermore: an observation window is provided at a corresponding position of the conveying channel corresponding to the material guide screw rotating at the bottom of the shot blasting chamber.

[0015] Compared with the prior art, the utility model has the following advantages and effects:

[0016] The utility model discloses a shot blasting machine for grinding the surface of steel workpieces. Compared with the traditional hanging-type shot blasting machine, the electric hoist main body of the shot blasting machine is additionally provided with a driving component. The driving component can prevent the casting suspended thereon from rotating in the shot blasting chamber during the cleaning process of the shot blasting machine, and at the same time, under the stable drive of the driving component, the casting can be stably rotated, and the speed or steering control of the driving component can be coordinated with the shot blasting machine during the cleaning process to ensure that the surface smoothness of the casting is more uniform, further improve the cleaning effect, and meet different use requirements. On the other hand, the electric hoist main body is provided with a driving component. The addition of a fixed seat connected to the hoist and a driving component thereon can also further increase the deadweight at the rope hook position, further reduce the swing amplitude of the casting suspended thereon during the hanging or cleaning process, reduce further damage to the inner wall of the shot blasting chamber, and improve the stability and cleaning effect of the casting during rotation. In addition, under the driving action of its driving component, the number of shot blasting machines in the shot blasting chamber can be appropriately reduced by controlling the rotation of the casting, which can save a certain amount of use cost while ensuring a certain cleaning effect, reduce energy loss during use, meet different use conditions and use requirements, and improve applicability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1-2 The utility model is a schematic diagram of the overall structure of a shot blasting machine for grinding the surface of a steel workpiece according to an embodiment of the present invention.

[0018] Figure 3 It is an enlarged structural diagram of the electric hoist according to the embodiment of the utility model.

[0019] Figure 4It is an enlarged view of the internal structure of the shot blasting room of the embodiment of the utility model.

[0020] Figure 5 It is an enlarged view of the internal structure of the conveying channel of the embodiment of the utility model.

[0021] Figure 6-7 It is an enlarged structural diagram of the dust removal component of the embodiment of the utility model.

[0022] Figure numbers: shot blasting machine body 100, driving component 101, second driving component 102, shot blasting chamber 1, electric hoist 2, rope 21, fixed seat 22, reel 221, rope hook 23, toothed disc 24, shot blasting machine 3, conveying mechanism 4, conveying chain 41, feeding hopper 411, guide screw 42, conveying channel 43, observation window 431, feeding chamber 44, feeding pipe 441, separation chamber 45, ash outlet 451, dust removal assembly 5, first dust removal part 51, dust removal cyclone body 511, ash hopper 512, second dust removal part 52, second dust collector 521, exhaust port 5211, discharge port 5212, filter cartridge 5213, fan 522, pulse spray valve 523, air pipe 5231, air storage tank 5232, air duct 53. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0024] See also Figure 1-3 The present embodiment relates to a shot blasting machine for grinding the surface of a steel workpiece, including a shot blasting machine body 100 with a hanging structure, wherein the shot blasting machine body 100 includes a shot blasting chamber 1, an electric hoist 2 arranged above the shot blasting chamber 1, a plurality of shot blasting devices 3 arranged in the shot blasting chamber 1, and a conveying mechanism 4 for conveying projectiles connected to the bottom of the shot blasting chamber 1 and the shot blasting devices 3, wherein the head end of a rope 21 on the electric hoist 2 is connected to a fixed seat 22, a rope hook 23 is arranged below the fixed seat 22, and the rope hook 23 is driven to rotate by a driving component 101 arranged above the fixed seat 22.

[0025] Specifically in this embodiment, the specific structure of this shot blasting machine can be seen in Figure 1-2 As shown, when in use, the casting of the steel workpiece to be cleaned is adapted to be hung on the rope hook 23 below the fixed seat 22 on the main body of the electric hoist 2 to be fixed. After the hanging is completed, the casting can move with the electric hoist 2 on the adapter frame and stop in the shot blasting room 1. The casting hung on the rope hook 23 of the electric hoist 2 is cleaned by multiple groups of shot blasting machines 3 in the shot blasting room 1, and can participate in Figure 3As shown, the driving component 101 on the fixed seat 22 can drive the rope hook 23 and the casting suspended thereon to rotate synchronously in the shot blasting chamber 1, so as to cooperate with the multiple groups of shot blasting machines 3 in the shot blasting chamber 1 to perform comprehensive grinding and other cleaning processes on the surface of the casting. The batches of projectiles thrown by the multiple groups of shot blasting machines 3 can be transported by the conveying mechanism 4 provided at the bottom of the shot blasting chamber 1 and added to the shot blasting machine 3 for recycling. Compared with the traditional hanging-type shot blasting machine, the driving component 101 is additionally provided on the main body of the electric hoist 2 of this shot blasting machine. On the one hand, the driving component 101 can prevent the casting suspended thereon from rotating during the cleaning process of the shot blasting machine 3 in the shot blasting chamber 1. At the same time, under the stable drive of the driving component 101, the casting can be stably rotated, and the rotation speed or steering control of the driving component 101 is coordinated with the shot blasting During the cleaning process, the shot blasting machine 3 can ensure that the surface smoothness of the casting is more uniform, further improve the cleaning effect, and meet different usage requirements. On the other hand, the addition of the fixed seat 22 connected to the electric hoist 2 and the driving component 101 thereon can also further increase the deadweight of the rope hook 23, further reduce the shaking amplitude of the casting suspended thereon during the hanging or cleaning process, reduce further damage to the inner wall of the shot blasting chamber 1, and improve the stability and cleaning effect of the casting during rotation. In addition, under the driving action of its driving component 101, the number of shot blasting machines 3 in the shot blasting chamber 1 can be appropriately reduced by controlling the rotation of the casting, which can save a certain amount of use cost while ensuring a certain cleaning effect, reduce energy loss during use, meet different usage conditions and usage requirements, and improve applicability and practicality.

[0026] The main body of the electric hoist 2 is composed of a double drum structure, and the two groups of ropes 21 wound on the double drum are respectively connected to the reels 221 rotatably arranged on both sides of the driving component 101 above the fixing seat 22. Figure 3 As shown in the figure, the main body of the electric hoist 2 with a double-drum structure drives the fixed seat 22 connected below to move up and down through the two groups of ropes 21 wound thereon, and the reels 221 on both sides of the driving component 101 on the fixed seat 22 are rotated to adjust the ropes 21 connected thereto, so as to maintain the stability of the fixed seat 22 during the up and down movement. The fixed seat 22 connected to the electric hoist 2 in this connection mode cooperates with the double-drum structure of the main body of the electric hoist 2, which can effectively reduce the twisting or knotting of the rope 21, and further avoid the self-rotation of the casting during the cleaning process of the shot blasting chamber 1, and improve the stability of the fixed seat 22 and its driving component 101 during movement and use, reduce the shaking amplitude of the casting suspended thereon, and further improve the cleaning effect and cleaning stability of the casting.

[0027] The rope hook 23 rotatably arranged below the fixed seat 22 is installed on the fixed seat 22 through a detachable structure, and a toothed disc 24 is provided at the top connection position of the rope hook 23 below the fixed seat 22. The adapting rope hook 23 below the fixed seat 22 can be rotatably installed under the fixed seat 22 through a threaded structure to fix it. The rope hook 23 connected by the detachable structure can be easily installed, disassembled and replaced, so that the adapting rope hook 23 can be selected according to the specific size and type of the casting to be cleaned to meet different usage requirements. In addition, the setting of the toothed disc 24 at the top connection position of the rope hook 23 can further increase the dead weight of the fixed seat 22 under the premise of ensuring the stable operation of the electric hoist 2, thereby further reducing the shaking amplitude of the casting to be cleaned suspended on the rope hook 23 during the cleaning process, and further improving the stability of the driving component 101 in the process of driving the casting to rotate.

[0028] The shot blasting machines 3 in the shot blasting room 1 are arranged in two groups and are arranged at a certain angle to match the size of the shot blasting room 1. Figure 4 As shown in the figure, the shot blasting machine 3 set at a certain angle cooperates with the driving component 101 on the fixed seat 22 to achieve comprehensive cleaning of the castings in the shot blasting chamber 1. Under the premise of ensuring a certain cleaning effect, the number of shot blasting machines 3 on the shot blasting chamber 1 can be further reduced, thereby further reducing the energy loss during use and saving a certain amount of use cost.

[0029] The conveying mechanism 4 includes a second driving component 102 and a conveying chain 41. The bottom of the shot blasting chamber 1 is provided with a hopper-shaped and rotatable guide screw 42. The second driving component 102 is placed on the top of the conveying channel 43 provided on the outside of the shot blasting chamber 1 and is connected to the guide screw 42 at the bottom of the shot blasting chamber 1 through the conveying chain 41 in the conveying channel 43 and driven to rotate. A plurality of feeding hoppers 411 are evenly distributed on the conveying chain 41 in the conveying channel 43. The feeding hoppers 411 are fixed on the chain links of the conveying chain 41. A feeding chamber 44 is provided on the top of the conveying channel 43. The feeding chamber 44 is respectively connected to the corresponding plurality of shot blasting machines 3 in the shot blasting chamber 1 through a plurality of feeding pipes 441 provided at the bottom. The shot blasting machines 3 eject the shot blasting machines 3. The batch of shots can be accumulated at the hopper-shaped bottom of the shot blasting chamber 1. At the same time, the guide screw 42 connected to the second driving component 102 through the conveying chain 41 can be adapted to rotate at the bottom of the shot blasting chamber 1 under the drive of the second driving component 102, so that the batch of shots accumulated at the bottom of the shot blasting chamber 1 are conveyed to the conveying channel 43 connected to the outside of the shot blasting chamber 1. The batch of shots accumulated at the bottom of the conveying channel 43 can be continuously circulated and rotated through the multiple feeding hoppers 411 distributed on the conveying chain 41, so that the batch of shots at the bottom of the conveying channel 43 are continuously filled into the multiple feeding hoppers 411 on the conveying chain 41 under the drive of the second driving component 102 and will be conveyed upward along the conveying pipeline. The specific structure inside the conveying channel 43 can be seen in Figure 4 As shown in the figure, when the batch of shots contained in the feeding hopper 411 are transported upward along the conveying pipe and placed at the feeding chamber 44 at the top of the conveying channel 43, the feeding hopper 411 rotates continuously with the chain links on the conveying chain 41 to pour the batch of shots contained therein into the feeding chamber 44. The batch shots in the feeding chamber 44 can continue to be transported to the corresponding multiple groups of shot blasting machines 3 along the multiple groups of feeding pipes 441 arranged at the bottom, so as to realize the cyclic transportation and use process of the batch shots. The bottom of the shot blasting chamber 1 in the shape of a hopper can increase the collection rate of the batch shots and the conveying efficiency of the guide screw 42. The specific structural setting of the conveying mechanism 4 can effectively improve the conveying stability of the shots and other media of this shot blasting machine, meet the automation requirements, improve the stability of the shot conveying in the shot blasting machine 3 and the work efficiency and cleaning quality of the casting surface treatment.

[0030] The feed chamber 44 at the top of the conveying channel 43 is also provided with a separation chamber 45 for removing impurities from the projectiles. A separator is provided inside the separation chamber 45 and an ash outlet 451 is provided at the bottom. Figure 1 or Figure 2As shown in the figure, the batch of shots arriving at the feed chamber 44 through the conveying mechanism 4 can be removed by the separation chamber 45 provided in the feed chamber 44, and the impurities mixed in the batch of shots during the casting cleaning process through the shot blasting machine 3 can be separated. The separation chamber 45 structure can be filtered by a traditional filter plate, and the batch of shots after separation and impurity removal continue to reach the shot blasting machine 3 through the feed pipe 441 at the bottom of the feed chamber 44 for recycling. The impurities in the batch of shots after separation and impurity removal can be discharged and collected through the ash outlet 451 at the bottom of the separation chamber 45. The setting of the separation chamber 45 facilitates the impurity removal operation and can further improve the use and cleaning effect of the shot and other media used for casting cleaning by this shot blasting machine.

[0031] The conveying channel 43 of the shot blasting chamber 1 is also connected to a dust removal component 5. The dust removal component 5 provided on the conveying channel 43 can perform dust removal operations on the dust generated by the conveying mechanism 4 inside the conveying channel 43 during the batch shot conveying process, thereby reducing the excessive dust inside the conveying channel 43 that affects the conveying stability of the conveying mechanism 4 or the pollution to the environment caused by the discharge to the outside world and unnecessary harm to the human body, thereby improving the working stability and functional diversity of this shot blasting machine.

[0032] See also Figure 6-7The dust removal assembly 5 includes a first dust removal part 51 and a second dust removal part 52, and the first dust removal part 51 and the second dust removal part 52 are connected to the conveying channel 43 through an air duct 53. The first dust removal part 51 includes a dust removal cyclone body 511 and a ash hopper 512 connected thereto, and the second dust removal part 52 includes a second dust collector 521, and the second dust collector 521 is connected to the dust removal cyclone body 511 through an air duct 53. The second dust collector 521 is provided with an exhaust port 5211 at the top and is connected to a fan 522. , a hopper-shaped discharge port 5212 is provided at the bottom and a plurality of filter cartridges 5213 are distributed inside. The top of the filter cartridge 5213 is connected to a plurality of pulse spray valves 523 provided on the outer side of the second dust collector 521 through an air pipe 5231. The plurality of pulse spray valves 523 are connected to each other through an air storage tank 5232 provided at the bottom and fixed to the corresponding position on the outer side of the second dust collector 521. The dust generated in the conveying channel 43 is firstly discharged by the dust removal cyclone 511 of the first dust removal part 51 through the wind. The dust is then blown through the duct 53 to the dust cyclone 511 for primary dust removal. The impurities such as particles contained in the dust are initially separated through the ash hopper 512 below. The dust after primary dust removal then passes through the air duct 53 to enter the second dust collector 521 of the second dust removal section 52. The dust in the second dust collector 521 is sprayed through the air pipe 5231 under the action of multiple sets of pulse spray valves 523 connected to the air storage tank 5232, i.e., secondary dust removal. The fine particles and other impurities mixed in the dust can be removed by the filter cartridge 5213. The impurities are filtered out and discharged through the lower discharge port 5212, and the air after dust removal by the second dust collector 521 can be discharged through the upper exhaust port 5211 and the fan 522 at the exhaust port 5211, thereby realizing the dust removal process in the conveying channel 43. The arrangement of the first dust removal part 51 and the second dust removal part 52 in the dust removal component 5 can further improve the dust removal effect and efficiency, ensure the cleanliness of the working environment, meet different use environments and emission requirements, and reduce pollution to the environment and further harm to the staff.

[0033] An observation window 431 is provided at the corresponding position of the conveying channel 43 corresponding to the guide screw 42 rotating at the bottom of the shot blasting chamber 1. The setting of the observation window 431 at the corresponding position can facilitate real-time observation and adjustment of the conveying conditions of the batch of projectiles and other media rotating through the guide screw 42 at the bottom of the shot blasting chamber 1 during the casting cleaning process, further improve the stability of the conveying process of the conveying mechanism 4, and facilitate the observation and adjustment of the wear state of the batch of projectiles and other media, thereby further improving the cleaning effect and the stability during the cleaning process, and improving the flexibility and convenience during use.

[0034] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.

Claims

1. A shot blasting machine for grinding the surface of a steel workpiece, comprising a shot blasting machine body with a hanging structure, the shot blasting machine body comprising a shot blasting chamber, an electric hoist arranged above the shot blasting chamber, a plurality of shot blasting wheels arranged in the shot blasting chamber, and a conveying mechanism for conveying projectiles connected to the bottom of the shot blasting chamber and the shot blasting wheels, characterized in that: The head end of the rope on the electric hoist is connected to a fixing seat, a rope hook is arranged below the fixing seat, and the rope hook is driven to rotate by a driving component arranged above the fixing seat.

2. A shot blasting machine for grinding the surface of a steel workpiece according to claim 1, characterized in that: The main body of the electric hoist is composed of a double-drum structure, and two groups of ropes wound on the double drums are respectively connected to reels rotatably arranged on both sides of the driving component above the fixed seat.

3. The shot blasting machine for grinding the surface of a steel workpiece according to claim 1, characterized in that: The rope hook rotatably arranged below the fixing seat is installed on the fixing seat through a detachable structure, and a toothed disc is arranged at the top connection position of the rope hook below the fixing seat.

4. The shot blasting machine for grinding the surface of a steel workpiece according to claim 1, characterized in that: The shot blasting machines in the shot blasting chamber are arranged in two groups and are arranged at a certain angle relative to each other according to the size of the shot blasting chamber.

5. The shot blasting machine for grinding the surface of a steel workpiece according to claim 1, characterized in that: The conveying mechanism includes a second driving component and a conveying chain. The bottom of the shot blasting chamber is provided with a hopper-shaped and rotatable material guide screw. The second driving component is placed on the top of the conveying channel provided on the outside of the shot blasting chamber and is connected to the material guide screw at the bottom of the shot blasting chamber through the conveying chain in the conveying channel and driven to rotate. A plurality of feeding hoppers are evenly distributed on the conveying chain in the conveying channel. The feeding hoppers are fixed on the chain links of the conveying chain. A feeding chamber is provided on the top of the conveying channel. The feeding chamber is connected to the corresponding multiple groups of shot blasters in the shot blasting chamber through multiple groups of feeding pipes provided at the bottom.

6. A shot blasting machine for grinding the surface of a steel workpiece according to claim 5, characterized in that: A separation chamber for removing impurities from the projectiles is also provided in the feed chamber at the top of the conveying channel, a separator is provided inside the separation chamber and an ash outlet is provided at the bottom.

7. The shot blasting machine for grinding the surface of a steel workpiece according to claim 5, characterized in that: The conveying channel of the shot blasting chamber is also connected with a dust removal component.

8. The shot blasting machine for grinding the surface of a steel workpiece according to claim 7, characterized in that: The dust removal assembly includes a first dust removal part and a second dust removal part, the first dust removal part and the second dust removal part are connected to the conveying channel through an air duct, the first dust removal part includes a dust removal cyclone body and a ash hopper connected thereto below, the second dust removal part includes a second dust collector, the second dust collector is connected to the dust removal cyclone body through an air duct, the second dust collector is provided with an exhaust port on the top and is connected to a fan, a hopper-shaped discharge port is provided on the bottom and a plurality of filter cartridges are distributed inside, the top of the filter cartridge is connected to a plurality of groups of pulse spray valves adapted to be provided on the outside of the second dust collector through an air pipe, the plurality of groups of pulse spray valves are connected to each other through an air storage tank provided at the bottom thereof and are fixed to corresponding positions on the outside of the second dust collector.

9. The shot blasting machine for grinding the surface of a steel workpiece according to claim 5, characterized in that: An observation window is arranged at a corresponding position of the conveying channel corresponding to the material guide screw rotating at the bottom of the shot blasting chamber.

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