Shot blasting machine for polishing inner side surface of tower drum

Abstract

The utility model relates to the technical field of workpiece surface polishing equipment, in particular to a shot blasting machine for polishing the inner side surface of a tower drum. Comprising a supporting arm, a shot blasting box is hinged to the front end of the supporting arm, a first driving mechanism is hinged to the front side of the shot blasting box, the end of the first driving mechanism is hinged to the supporting arm, the shot blasting box comprises a side plate defining a containing space and a bottom plate arranged at the lower end of the side plate, an opening is formed in the upper end of the shot blasting box, and a shot blasting device is arranged on the lower side of the bottom plate; and a baffle is arranged at the upper end of the side plate, and the upper portion of the baffle is attached to the inner side face of the tower drum. The baffles on the left side plate, the right side plate, the front side plate and the rear side plate of the shot blasting box are attached to the inner side face of the tower, so that most shots thrown by the shot blasting device still fall into the shot blasting box after impacting the inner side wall of the tower, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece surface polishing equipment, in particular to a shot blasting machine for polishing the inner side surface of a tower barrel. Background Art

[0002] A shot blasting machine is a casting equipment that uses a high-speed shot flow ejected by a shot blaster to impact the oxide scale, rust layer and other sundries on the surface of a workpiece, so that the workpiece obtains a fine and bright surface. The shot blasting machine can simultaneously perform operations such as sand falling, core removing and cleaning on the workpiece. Compared with other surface treatment technologies, the shot blasting machine has higher working efficiency. Polishing refers to a processing method that uses mechanical, chemical or electrochemical actions to reduce the surface roughness of a workpiece to obtain a bright and flat surface. The shot blasting machine is a device that can effectively polish the surface of a workpiece.

[0003] In the support work of the wind power industry, tower barrels with a diameter of three to fifteen meters are mostly required. After the tower barrels are processed, they all need to be descaled. When the existing shot blasting equipment grinds the tower barrels, since the pipe wall is arc-shaped, the shot hitting the side wall of the pipe is easy to rebound, and the rebounded shot is very easy to contact the operator, posing a great safety hazard. Summary of the Invention

[0004] In order to solve the problem that there is a great safety hazard when the existing shot blasting equipment polishes the tower barrel, the utility model provides a shot blasting machine for polishing the inner side surface of a tower barrel. By means of the left and right side plates on the shot blasting box of the shot blasting machine and the baffles on the front and rear side plates of the shot blasting box fitting with the inner side surface of the tower barrel, most of the shot ejected by the shot blaster still falls into the shot blasting box after impacting the inner side wall of the tower barrel, reducing the safety hazard.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A shot blasting machine for polishing the inner side surface of a tower barrel includes a support arm. The front end of the support arm is hinged with a shot blasting box. The front side of the shot blasting box is hinged with a first driving mechanism, and the end of the first driving mechanism is hinged with the support arm. The shot blasting box includes side plates enclosing to form an accommodating space and a bottom plate arranged at the lower end of the side plates. The upper end of the shot blasting box is open. A shot blaster is arranged under the bottom plate, and the discharging end of the shot blaster extends into the accommodating space. A baffle is arranged at the upper end of the side plate, and the upper part of the baffle fits with the inner side surface of the tower barrel. The baffles on the front and rear side walls and the left and right side walls of the shot blasting box all fit with the inner side surface of the tower barrel to close the upper opening of the shot blasting box. Most of the shot ejected by the shot blaster still falls into the shot blasting box after impacting the inner side wall of the tower barrel.

[0007] Furthermore, a first baffle plate is relatively arranged at the lower part of the accommodation space, and a plurality of second baffle plates connected in sequence are arranged at the upper part of the accommodation space. The cylindrical structure formed by the plurality of second baffle plates matches the upper part of the shot blasting chamber. The discharge end of the shot blaster is located between the relatively arranged first baffle plates, and the cylindrical structure is located between the first baffle plate and the side plate of the shot blasting chamber. The shooting range of most of the shot of the shot blaster is within the cylindrical structure, and the shot blasting chamber surrounds the cylindrical structure therein, as much as possible to prevent the shot from rushing out of the shot blasting chamber after impacting the inner side wall of the tower barrel and causing damage to surrounding equipment or personnel.

[0008] Furthermore, a discharge port is formed on the bottom plate of the shot blasting chamber. The discharge port is located between the first baffle plate and the side plate of the shot blasting chamber. A guide plate is also arranged between the first baffle plate and the side plate of the shot blasting chamber, and the guide plate is arranged in a dislocation manner with the discharge port. The cylindrical structure is located between the first baffle plate and the side plate of the shot blasting chamber; in the storage bin, part of the shot falls into the discharge port through the gap between the first baffle plate and the second baffle plate, part falls into the discharge port through the opening on the first baffle plate, and part directly falls into the discharge port through the gap between the second baffle plate and the side wall of the shot blasting chamber, which is beneficial to the efficient recovery of the shot; the guide plate can also play a role in strengthening the first baffle plate and maintaining the stability of the first baffle plate.

[0009] Furthermore, both the first baffle plate and the second baffle plate are arranged to be inclined outwards.

[0010] Furthermore, it further includes a maintenance platform. A connecting seat is arranged on the maintenance platform. The support arm is hinged to the connecting seat. A second driving mechanism is arranged at the rear end of the support arm, and a counterweight is also arranged at the rear end of the support arm. The counterweight is to increase the gravity at the rear end of the support arm and avoid excessive gravity at the front end of the support arm, which may damage the shot blaster; the second driving mechanism controls the inclination angle of the support arm, which is beneficial to subsequent adjustment according to actual situations.

[0011] Furthermore, the first driving mechanism and the second driving mechanism are oil cylinders.

[0012] Furthermore, it further includes a shot recovery and conveying mechanism. The shot recovery and conveying mechanism includes a first conveyor belt, a second conveyor belt and a lifting mechanism. The first conveyor belt is used to convey shot to the shot blasting chamber, the second conveyor belt is used to recover the shot in the shot blasting chamber. Both the first conveyor belt and the second conveyor belt are arranged on the support arm. The first conveyor belt is located above the second conveyor belt, and the lifting mechanism is used to connect the output end of the second conveyor belt and the input end of the first conveyor belt.

[0013] Furthermore, the lifting mechanism is a bucket elevator.

[0014] Further, the projectile recovery and conveying mechanism further includes a feed hopper fixed on the side wall of the shot blasting chamber, a screw conveyor, and a discharge hopper fixed on the lower side of the bottom plate of the shot blasting chamber. The discharge hopper is communicated with the shot blasting chamber. The feed hopper is used to receive the projectiles conveyed by the first conveyor belt. The discharge end of the feed hopper is communicated with the screw conveyor. The screw conveyor is used to convey the projectiles to the shot blaster. The discharge end of the discharge hopper is located above the second conveyor belt. The projectiles recovered in the shot blasting chamber pass through the discharge hopper, the second conveyor belt, the bucket elevator, the first conveyor belt, the feed hopper, and the screw conveyor in sequence and then enter the shot blaster again, realizing the repeated use of the projectiles and improving the efficiency.

[0015] Further, a dust removal mechanism is also included. The dust removal mechanism includes a dust suction pipe and a plurality of steel sand sedimentation tanks. The steel sand sedimentation tanks are arranged on the support arms. The dust suction pipe is communicated with the shot blasting chamber. The dust suction pipe is sequentially communicated with a plurality of steel sand sedimentation tanks and then connected to an external air extraction mechanism. The impact of the projectiles on the tower barrel causes the iron filings and dust on the tower barrel to fall into the shot blasting chamber. Then, the dust removal mechanism works to remove the iron filings and dust in the shot blasting chamber.

[0016] Through the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] 1. The baffles on the front and rear side walls of the shot blasting chamber of the present utility model are in close contact with the inner side surface of the tower barrel on both the left and right side walls to close the upper opening of the shot blasting chamber. Most of the projectiles thrown by the shot blaster will still be retained in the shot blasting chamber after impacting the inner side wall of the tower barrel, avoiding damage to surrounding equipment or personnel.

[0018] 2. The rear side of the shot blasting chamber of the present utility model is hinged to the working arm. The front side of the shot blasting chamber is hinged with a first driving mechanism. The first driving mechanism is hinged on the working arm. The inclination of the shot blasting chamber is adjusted by the first driving mechanism. And the rear end of the working arm is hinged with a second driving mechanism to adjust the inclination of the working arm. The first driving mechanism and the second driving mechanism cooperate to improve the application range of the device.

[0019] 3. The shot blasting machine of the present utility model is provided with a projectile recovery and conveying mechanism. The projectiles retained in the shot blasting chamber pass through the discharge hopper, the second conveyor belt, the bucket elevator, the first conveyor belt, the feed hopper, and the screw conveyor in sequence and then enter the shot blaster again, realizing the repeated use of the projectiles and improving the efficiency of tower barrel polishing.

[0020] 4. The shot blasting machine of the present utility model is also provided with a dust removal mechanism to centrally collect the iron filings and dust in the shot blasting chamber, avoid dust flying, and improve the quality of the working environment. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a shot blasting machine for polishing the inner side surface of a tower barrel of the present utility model;

[0022] Figure 2 Structural magnification of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 1 ;

[0023] Figure 3 Structural magnification of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 2 ;

[0024] Figure 4 Schematic diagram of the structure of the shot blasting chamber of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 1 ;

[0025] Figure 5 Schematic diagram of the structure of the shot blasting chamber of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 2 ;

[0026] Figure 6 Schematic diagram of some mechanisms of the shot blasting chamber of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 1 ;

[0027] Figure 7 Schematic diagram of some mechanisms of the shot blasting chamber of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 2 ;

[0028] Figure 8 Schematic diagram of some mechanisms of the shot blasting chamber of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 3 ;

[0029] Figure 9 Schematic diagram of the structure where the support arm and the connecting seat of a shot blasting machine for polishing the inner side of a tower barrel in the present utility model are hinged;

[0030] Figure 10 For a shot blasting machine for polishing the inner side of a tower barrel in the present utility model Figure 1 The enlarged view of the structure at A in

[0031] In the attached drawings, the reference numerals are: 1 is the support arm, 2 is the shot blasting chamber, 3 is the first driving mechanism, 4 is the shot blasting device, 5 is the baffle, 6 is the first material baffle, 7 is the second material baffle, 8 is the discharge port, 9 is the material guiding plate, 10 is the maintenance platform, 11 is the connecting seat, 12 is the second driving mechanism, 13 is the counterweight, 14 is the first conveyor belt, 15 is the second conveyor belt, 16 is the lifting mechanism, 17 is the feeding hopper, 18 is the screw conveying mechanism, 19 is the discharge hopper, 20 is the dust suction pipe, 21 is the steel sand sedimentation tank, 22 is the dust suction port, 31 is the fixing plate, 32 is the conveying pipe, 33 is the fixing block, 34 is the third material baffle, 35 is the third hopper, 36 is the first hinge seat, 36 is the fourth hopper. Specific implementation mode

[0032] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0033] As Figures 1 to 10 shown, this embodiment provides a shot blasting machine for polishing the inner side of a tower barrel, including a support arm 1. The front end of the support arm 1 is hinged with a shot blasting box 2. The front side of the shot blasting box 2 is hinged with a first driving mechanism 3. The end of the first driving mechanism 3 is hinged with the support arm 1. The shot blasting machine further includes a maintenance platform 10. A connecting seat 11 is provided on the bottom plate of the maintenance platform 10. The support arm 1 is hinged with the connecting seat 11. The rear end of the support arm 1 is hinged with a second driving mechanism 12.

[0034] In this embodiment, a support column (not shown in the figure) can be fixed at the lower end of the shot blasting box 2. The end of the support column abuts against the support arm 1, which can effectively extend the service life of the first driving mechanism 3.

[0035] In this embodiment, as Figure 2 and Figure 4 shown, a fixed block 33 is fixed on the rear side wall of the shot blasting box 2. A first hinge portion is provided on the fixed block 33. The support arm 1 is provided with a second hinge portion. The first hinge portion and the second hinge portion are penetrated by a rotating shaft to realize the hinge connection between the shot blasting box 2 and the support arm 1. The end of the first driving mechanism 3 is hinged with a first hinge seat 36. The hinge seat 36 is fixed on the support arm 1 to realize the control of the inclination of the shot blasting box 2 by the first driving mechanism 3. In this embodiment, both the first driving mechanism 3 and the second driving mechanism 12 are oil cylinders.

[0036] In this embodiment, as Figure 1 and Figure 9 shown, two connecting seats 11 are provided on the bottom plate of the maintenance platform 10. The support arm 1 passes through the maintenance platform 10 and is hinged with the two connecting seats 11. Specifically: two second hinge seats are provided at the lower end of the support arm 1. Third hinge seats cooperating with the second hinge seats are provided on both connecting seats 11. The second hinge seats and the third hinge seats are penetrated by a rotating shaft to realize the hinge connection between the support arm 1 and the connecting seat 11.

[0037] In this embodiment, as Figure 1 shown, in order to avoid excessive gravity at the front end of the support arm 1 and damage the shot blasting machine, a counterweight block 13 is further provided at the rear end of the support arm 1.

[0038] The shot blasting box 2 includes side plates surrounding to form an accommodation space and a bottom plate provided at the lower end of the side plates. The upper end of the shot blasting box 2 is open. A shot blasting device 4 is provided under the bottom plate. The discharging end of the shot blasting device 4 extends into the accommodation space. A baffle 5 is provided at the upper end of the side plates. The upper part of the baffle 5 is in contact with the inner side of the tower barrel. In this embodiment, the shot blasting box 2 is composed of four side plates (as Figures 4 to 8), on the side plates on its front and rear sides, there are baffle plates 5, and the side plates on the left and right sides are inclined outward, and cooperate with the baffle plates 5 to fit against the arc-shaped inner side surface of the tower barrel.

[0039] Further, two first baffle plates 6 are oppositely arranged at the lower part of the accommodation space, and four second baffle plates 7 are sequentially connected at the upper part of the accommodation space. The cylindrical structure formed by the four second baffle plates 7 matches the upper part of the shot blasting box 2. The discharge end of the shot blaster 4 is located between the relatively arranged first baffle plates 6, and the cylindrical structure is located between the first baffle plates 6 and the side plates of the shot blasting box 2.

[0040] In this embodiment, as Figure 7 and Figure 8 shown, the four second baffle plates 7 are the four side plates of the cylindrical structure. The upper parts of the two side plates on the front and rear sides of the cylindrical structure are in a ring-sector shape, and the side plates on its left and right sides are square plate bodies and are inclined outward.

[0041] In this embodiment, the side plates on the left and right sides of the cylindrical structure are respectively located on the side far from the two first baffle plates 6, and the side plates on the left and right sides of the cylindrical structure are located between the first baffle plates 6 and the side plates of the shot blasting box 2. The first baffle plates 6 are also inclined outward to prevent the shot pellets thrown by the shot blaster 4 from being blocked by the components inside the shot blasting box 2.

[0042] An outlet 8 is opened on the bottom plate of the shot blasting box 2. The outlet 8 is located between the first baffle plate 6 and the side plate of the shot blasting box 2. A guide plate 9 is also provided between the first baffle plate 6 and the side plate of the shot blasting box 2. The guide plate 9 is arranged in a dislocation manner with the outlet 8. Openings are provided on the first baffle plates 6 for the circulation of the shot pellets in the shot blasting box 2 to handle the shot pellets that do not fall between the first baffle plates 6 and the side plates of the shot blasting box 2. After a part of the shot pellets recovered in the shot blasting box 2 hit the side plate of the tower barrel and rebound, they fall along the second baffle plate 7 to between the first baffle plate 6 and the side plate of the shot blasting box 2 and then fall into the outlet 8. Some fall into the outlet 8 through the openings on the first baffle plates 6, and some directly fall into the outlet 8 through the gap between the second baffle plate 7 and the side wall of the shot blasting box 2.

[0043] In this embodiment, in order to improve the recovery probability of the shot pellets, the cylindrical structure arranged inside the shot blasting box 2 is the first collection mechanism for the shot pellets. Then, the part of the shot pellets that leak out will also hit the side plate of the shot blasting box 2 and be collected by the shot blasting box 2 again.

[0044] In this embodiment, both the cylindrical structure and the upper part of the side plate of the shot blasting box 2 are plate bodies made of elastic materials. While ensuring that the side wall fits more closely against the inner side of the tower barrel, it can also better recover the shot pellets, prevent the side wall from being damaged after multiple impacts, and reduce noise.

[0045] As an implementable mode, the shot blasting machine further includes a shot recycling and conveying mechanism, which includes a first conveyor belt 14, a second conveyor belt 15 and a lifting mechanism 16. The first conveyor belt 14 is used to convey shots to the shot blasting chamber 2, and the second conveyor belt 15 is used to recycle the shots in the shot blasting chamber 2. Both the first conveyor belt 14 and the second conveyor belt 15 are arranged on the support arm 1. The first conveyor belt 14 is located above the second conveyor belt 15. The lifting mechanism 16 is a bucket elevator, and the bucket elevator is used to connect the output end of the second conveyor belt 15 and the input end of the first conveyor belt 14. In this embodiment, the bucket elevator is installed on the maintenance platform 10.

[0046] Furthermore, the shot recycling and conveying mechanism further includes a feed hopper 17, a screw conveying mechanism 18 and a discharge hopper 19 fixed to the lower side of the bottom plate of the shot blasting chamber 2. The discharge hopper 19 is communicated with the shot blasting chamber 2. The feed hopper 17 is used to receive the shots conveyed by the first conveyor belt 14. The discharge end of the feed hopper 17 is communicated with the screw conveying mechanism 18. The screw conveying mechanism 18 is a screw conveyor, and the screw conveyor is used to convey shots to the shot blasting device 4. The discharge end of the discharge hopper 19 is located above the second conveyor belt 15. The screw conveying mechanism 18 is fixed to the side wall of the shot blasting chamber 2. The feed hopper 17 and the screw conveying mechanism 18 are installed together, and the feed hopper 17 is located at the rear side of the shot blasting chamber 2.

[0047] In this embodiment, as Figures 1 to 3 shown, the discharge hoppers 19 are arranged at the positions of the discharge ports 8 and there are 4 of them. The shots retained in the shot blasting chamber 2 fall into the third hopper 35 fixed on the support arm 1 through the discharge hoppers 19, then fall onto the second conveyor belt 15, are conveyed to the output end at the rear end of the second conveyor belt 15, and are conveyed to the first conveyor belt 14 through the fourth hopper 36 fixed on the connecting seat 11 via the bucket elevator. Then the shots are conveyed to the feed hopper 17 at the front end of the first conveyor belt 14 through the first conveyor belt 14, and then flow back to the input end of the shot blasting device 4 after passing through the screw conveying mechanism 18 and the conveying pipe 32 in sequence, waiting to be fired again, thus ensuring the recycling of the shots.

[0048] As an implementable mode, the shot blasting machine further includes a dust removal mechanism, which includes a dust suction pipe 20 and a plurality of steel shot sedimentation tanks 21. The steel shot sedimentation tanks 21 are arranged on the support arm 1. The dust suction pipe 20 is communicated with the shot blasting chamber 2. The dust suction pipe 20 is sequentially communicated with a plurality of steel shot sedimentation tanks 21 and then connected to an external air extraction mechanism. By using the external air extraction mechanism, a negative pressure environment is formed in the shot blasting chamber 2. The iron filings and dust retained in the shot blasting chamber 2 are centrally transported by the dust suction pipe 20, and the iron filings will remain in the steel shot sedimentation tanks 21. The dust removal mechanism removes a large amount of dust generated during shot blasting of the shot blasting machine, improving the environmental quality.

[0049] When polishing the tower barrel, the tower barrel is placed on a roller rack, and the rotation and lateral movement of the tower barrel are controlled by the roller rack.

[0050] When using this device to polish the tower barrel, the inclination angle of the support arm 1 is adjusted by the second driving mechanism 12, so that the shot blasting box 2 at the front end of the support arm 1 extends into the tower barrel. Then, the inclination of the shot blasting box 2 is adjusted by the first driving mechanism 3. At this time, the upper part of the shot blasting box 2 fits against the inner side wall of the tower barrel, and the shot blaster 4 works to polish the part of the inner side wall of the tower barrel that is fitted by the upper part of the shot blasting box 2. During this process, the roller rack drives the tower barrel to rotate, realizing the polishing of the inner side wall of the tower barrel during rotation. After polishing a complete circle of the inner side surface of this part of the tower barrel, the roller rack drives the tower barrel to move towards the side away from the shot blasting machine, and polish this part of the tower barrel again according to the above steps.

[0051] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent should be included within the scope of the present invention's patent application.

Claims

1. A shot blasting machine for polishing the inner side of a tower, characterized in that: The invention comprises a support arm (1), a front end of the support arm (1) being hingedly connected to a shot blasting box (2), a front side of the shot blasting box (2) being hingedly connected to a first driving mechanism (3), an end of the first driving mechanism (3) being hingedly connected to the support arm (1), the shot blasting box (2) comprising a side plate surrounding a receiving space and a bottom plate arranged at the lower end of the side plate, the upper end of the shot blasting box (2) being open, a shot blaster (4) being arranged at the lower side of the bottom plate, and a discharge end of the shot blaster (4) extending into the receiving space; A baffle (5) is provided on the upper end of the side plate, and the upper part of the baffle (5) is in contact with the inner side surface of the tower.

2. A shot blasting machine for polishing the inner side of a tower according to claim 1, characterized in that: A first baffle plate (6) is disposed oppositely to the lower portion of the accommodating space, and a plurality of second baffle plates (7) connected in sequence are disposed on the upper portion of the accommodating space. A cylindrical structure formed by the plurality of second baffle plates (7) matches the upper portion of the shot blasting box (2). The discharge end of the shot blasting device (4) is located between the first baffle plates (6) disposed oppositely, and the cylindrical structure is located between the first baffle plates (6) and the side plates of the shot blasting box (2).

3. A shot blasting machine for polishing the inner side of a tower tube according to claim 2, characterized in that: A discharge port (8) is provided on the bottom plate of the shot blasting box (2), and the discharge port (8) is located between the first material baffle plate (6) and the side plate of the shot blasting box (2). A material guide plate (9) is also provided between the first material baffle plate (6) and the side plate of the shot blasting box (2), and the material guide plate (9) and the discharge port (8) are arranged in an offset manner.

4. A shot blasting machine for polishing the inner side of a tower according to claim 2, characterized in that: The first material baffle plate (6) and the second material baffle plate (7) are both arranged to be inclined outwards.

5. The shot blasting machine for polishing the inner side of a tower tube according to claim 1, characterized in that: It also comprises an inspection platform (10), on which a connecting seat (11) is provided, the support arm (1) is hingedly connected to the connecting seat (11), a second driving mechanism (12) is provided at the rear end of the support arm (1), and a counterweight (13) is also provided at the rear end of the support arm (1).

6. A shot blasting machine for polishing the inner side of a tower tube according to claim 5, characterized in that: The first driving mechanism (3) and the second driving mechanism (12) are oil cylinders.

7. A shot blasting machine for polishing the inner side of a tower tube according to claim 1, characterized in that: The device also includes a shot recovery conveying mechanism, which includes a first conveyor belt (14), a second conveyor belt (15) and a lifting mechanism (16), wherein the first conveyor belt (14) is used to convey the shot to the shot blasting box (2), and the second conveyor belt (15) is used to recover the shot in the shot blasting box (2), the first conveyor belt (14) and the second conveyor belt (15) are both arranged on the support arm (1), the first conveyor belt (14) is located on the upper side of the second conveyor belt (15), and the lifting mechanism (16) is used to connect the output end of the second conveyor belt (15) with the input end of the first conveyor belt (14).

8. A shot blasting machine for polishing the inner side of a tower tube according to claim 7, characterized in that: The lifting mechanism (16) is a bucket elevator.

9. A shot blasting machine for polishing the inner side of a tower tube according to claim 7, characterized in that: The shot recovery and conveying mechanism further comprises a feed hopper (17), a screw conveying mechanism (18) and a discharge hopper (19) fixed to the lower side of the bottom plate of the shot blasting box (2), the discharge hopper (19) being connected to the shot blasting box (2), the feed hopper (17) being used to receive the shots conveyed by the first conveyor belt (14), the discharge end of the feed hopper (17) being connected to the screw conveying mechanism (18), the screw conveying mechanism (18) being used to convey the shots to the shot blasting device (4), and the discharge end of the discharge hopper (19) being located above the second conveyor belt (15).

10. A shot blasting machine for polishing the inner side of a tower tube according to claim 1, characterized in that: The device also comprises a dust removal mechanism, which comprises a dust suction pipe (20) and a plurality of steel grit settling boxes (21), wherein the steel grit settling boxes (21) are arranged on the support arm (1), the dust suction pipe (20) is connected to the shot blasting box (2), and the dust suction pipe (20) is connected to the plurality of steel grit settling boxes (21) in sequence and then connected to an external exhaust mechanism.

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