Long-life steel shot grading rounding device

Abstract

The invention discloses a long-service-life steel shot grading rounding device, and belongs to the technical field of steel shot rounding, the long-service-life steel shot grading rounding device comprises a feeding mechanism used for feeding steel shots and a main body frame body, and the main body frame body is provided with an impact mechanism used for conducting preliminary rounding on the steel shots and a grading mechanism used for conducting grading rounding on the steel shots; a three-stage collaborative rounding process of pre-grinding, impact grinding and fine grinding is set, firstly, a grinding plate which rotates in a steel shot box and is provided with a rough surface and a non-uniform grinding column is used for carrying out primary dispersion and corner angle grinding on steel shots, and primary regularization is achieved; the steel shots are subjected to strong and multi-angle impact grinding and efficient sharp edge removal by utilizing the impact block which rotates at a high speed and is provided with bulges on the surface, and finally, in the grading grinding cylinder, the lower grinding plate performs continuous fine grinding and rolling, so that the surface smoothness is ensured, and the geometric consistency and the surface quality of the steel shots are improved.

Description

Technical Field

[0001] This invention relates to the field of steel shot grinding technology, and in particular to a long-life steel shot grading grinding device. Background Technology

[0002] Steel shot, a widely used metal abrasive in steel surface cleaning, rust removal, strengthening, and forming processes, directly affects the treatment effect, equipment wear and tear, and service life due to its geometric shape, dimensional uniformity, and surface finish. Ideally, steel shot should be spherical and uniform in size, with high hardness, toughness, and good wear resistance. However, newly produced steel shot or steel shot used in recycling often has problems such as sharp edges, irregular shape, and uneven size distribution. Sharp or irregular steel shot not only reduces the surface treatment quality of the workpiece and causes uneven surface roughness, but also aggravates the abnormal wear of key components of sandblasting or shot blasting equipment, shortens the service life of the equipment, increases maintenance costs and downtime, and leads to an increased breakage rate and faster consumption of the steel shot itself.

[0003] To address the aforementioned issues, existing technologies typically employ steel shot rounding and grading devices. Currently, common processing methods rely on simple drum or vibratory grinding equipment, combined with screens for size grading. These devices generally suffer from the following drawbacks: traditional drum or vibratory grinding relies primarily on the collision and friction between steel shot particles, resulting in dispersed and random forces. This is unsatisfactory for removing sharp edges and achieving efficient sphericity, especially for mixed steel shot with significant size differences. The processing cycle is long, and it's difficult to ensure all steel shot achieves good roundness. Some equipment uses impact blocks at fixed angles, but the impact angle and force variation are small, making it difficult to achieve uniform, multi-directional impact on the steel shot surface, easily leading to localized excessive wear or uneven processing. The power systems for feeding, grinding, and grading are often independently set up, resulting in complex structures, high energy consumption, and poor coordination between stages, affecting overall processing smoothness and efficiency. The grinding and grading mechanisms are often fixed connections, making it inconvenient to replace worn parts, clean the interior, or remove graded steel shot, impacting equipment maintenance efficiency and operational continuity.

[0004] Therefore, there is an urgent need in the field for a well-designed, long-life steel shot grading and grinding device that can overcome the above-mentioned defects. This device should be able to effectively disperse and pre-grind the steel shot before grinding, adopt an efficient and multi-angle impact grinding method, integrate an efficient and anti-clogging precision grading function, and make the grading part easy to move and maintain, thereby significantly improving the grinding quality, grading accuracy, and processing efficiency of the steel shot, and ultimately achieving the goal of extending the service life of the steel shot itself and the service life of the key components of the processed equipment. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention adopts the following technical solution: a long-life steel shot grading and rounding device, comprising a feeding mechanism for feeding steel shot and a main frame, wherein the main frame is provided with an impact mechanism for preliminary rounding of steel shot and a grading mechanism for graded rounding of steel shot. The feeding mechanism includes a fixed frame fixedly installed on the main body, an impact cylinder fixedly installed on the fixed frame, a motor frame fixedly installed on the top of the impact cylinder, and a central motor fixedly installed on the motor frame.

[0006] Furthermore, the feeding mechanism also includes two sealing boxes fixedly installed on the main frame. The sealing boxes have a hollow structure inside. Two intermediate rotating shafts are rotatably installed on the impact cylinder. The central motor drives the intermediate rotating shafts to rotate through the main drive belt. An eccentric turntable is fixedly installed below the intermediate rotating shafts. An eccentric column is eccentrically set on the eccentric turntable. Bottom rollers are rotatably installed at the bottom of the main frame.

[0007] Furthermore, the feeding mechanism also includes an external air pipe fixedly installed on the sealing box, the external air pipe communicating with the inside of the sealing box, an inner piston rod slidably installed inside the external air pipe, a connecting hole provided on the external air pipe, a rotating connecting rod rotatably installed on the inner piston rod, and the rotating connecting rod rotatably installed with the eccentric column.

[0008] Furthermore, the feeding mechanism also includes four side connecting pipes fixedly installed on the side of the impact cylinder, two air blowing pipes fixedly installed on the sealing box, and a shot feeding pipe fixedly installed on the air blowing pipe, with the shot feeding pipe and the side connecting pipes fixedly installed.

[0009] Furthermore, the feeding mechanism also includes four side extension plates fixedly installed on the side of the impact cylinder. A shot box is fixedly installed on the side extension plates, and an inlet hopper is fixedly installed on the shot box. A distributing shaft is rotatably installed inside the shot box. A side transmission belt is wound around the middle shaft and the distributing shaft. A grinding plate is fixedly installed on the distributing shaft. The upper and lower surfaces of the grinding plate are rough surfaces. The grinding plate is located in the shot box. Multiple grinding columns are unevenly arranged below the grinding plate. A discharge hole is provided at the center of the bottom of the shot box. An inlet pipe is fixedly installed below the discharge hole. The inlet pipe is fixedly installed with the shot delivery pipe.

[0010] The steel shot to be processed is placed into four steel shot boxes through the hopper. The steel shot is located in the steel shot boxes. The central motor drives the central rotating shaft to rotate through the main drive belt. The central rotating shaft drives the eccentric turntable to rotate. The eccentric turntable drives the eccentric column to rotate eccentrically. The eccentric column drives the inner piston rod to slide back and forth in the outer air pipe through the rotating connecting rod. When the inner piston rod moves towards the sealing box, it blows air into the sealing box and pushes the air in the sealing box into the main frame through the blowing pipe, the shot delivery pipe and the side connecting pipe. When the inner piston rod moves away from the sealing box, after the inner piston rod moves to the outside of the connecting hole, the inside of the sealing box is connected to the outside. That is, when the inner piston rod slides back and forth in the outer air pipe, it continuously blows the air in the sealing box into the main frame through the blowing pipe, the shot delivery pipe and the side connecting pipe.

[0011] While the air inside the sealed box is blown into the main frame, the central rotating shaft drives the material distribution shaft and the grinding plate to rotate through the side transmission belt. The grinding plate uses the rough surfaces above and below to work with the bottom plate of the shot box to perform preliminary grinding of the steel shot. Then, the steel shot is pushed by the uneven grinding column. The steel shot then enters the feed pipe from the drop hole at the center of the shot box. The steel shot then falls to the lower end of the feed pipe and is sent into the impact cylinder by the air flowing in the feed pipe.

[0012] Furthermore, the impact mechanism includes a central gear fixedly mounted on the motor shaft of the central motor, four impact columns rotatably mounted on the impact cylinder, impact blocks and impact gears fixedly mounted on the impact columns, multiple protrusions on the surface of the impact blocks, the impact gear meshing with the central gear, a feed pipe at the bottom of the impact cylinder, and an inner hole plate fixedly mounted inside the fixed frame, with multiple holes provided on the inner hole plate.

[0013] When the central motor rotates, it also drives the central gear to rotate. The central gear drives the impact gear, impact column and impact block to rotate. After the steel shot is pushed into the impact cylinder, the steel shot comes into contact with the impact block and is impacted and ground by the impact block. Then the steel shot falls through the holes of the inner plate and is discharged from the feed pipe into the grinding cylinder.

[0014] Furthermore, the grading mechanism includes a grinding cylinder disposed below the main frame, a fixed perforated plate disposed inside the grinding cylinder, the fixed perforated plate having multiple holes, an upper collecting plate fixedly installed below the grinding cylinder, an upper perforated plate disposed inside the upper collecting plate, the upper perforated plate having multiple holes, a middle collecting plate fixedly installed below the upper collecting plate, a middle perforated plate disposed inside the middle collecting plate, the middle perforated plate having multiple holes, a lower collecting plate fixedly installed below the middle collecting plate, a lower collecting plate disposed inside the lower collecting plate, the size of the holes on the upper perforated plate being larger than the size of the holes on the middle perforated plate.

[0015] Furthermore, the grading mechanism also includes a movable trolley fixedly installed below the lower collection tray, a rotating frame rotatably installed below the movable trolley, movable rollers rotatably installed on the rotating frame, a grinding motor fixedly installed inside the grinding cylinder, a lower grinding plate fixedly installed on the motor shaft of the grinding motor, the upper and lower surfaces of the lower grinding plate are both rough surfaces, and multiple lower grinding columns are unevenly arranged below the lower grinding plate.

[0016] Furthermore, the grading mechanism also includes two side top shaft frames fixedly installed on the mobile trolley, with a side top shaft slidably installed on the side top shaft frame, and a top shaft spring provided between the side top shaft and the side top shaft frame. A vibrator is fixedly installed on the mobile trolley, and the vibrator is fixedly installed with the upper hole plate, the middle hole plate and the fixed hole plate.

[0017] After the steel shot enters the grinding cylinder, the grinding motor drives the lower grinding plate to rotate, further rounding the steel shot through the lower grinding plate. The lower grinding column continuously pushes the steel shot. When the diameter of the steel shot is smaller than the size of the hole in the fixed orifice plate, the steel shot falls onto the upper orifice plate. Steel shot larger than the size of the hole in the upper orifice plate will stay on the upper orifice plate, while steel shot smaller than the size of the hole in the upper orifice plate will fall onto the middle orifice plate. Subsequently, steel shot larger than the size of the hole in the middle orifice plate will stay on the middle orifice plate, while steel shot smaller than the size of the hole in the middle orifice plate will fall onto the lower collecting plate.

[0018] The vibration generated by the vibrator facilitates the falling of steel shot from the holes in the fixed plate, upper plate, and middle plate. When the grinding cylinder vibrates, it pushes the side top shaft to slide along the side top shaft frame. After the operation is completed, the grading mechanism can be moved away from the bottom of the main frame by moving the rollers, opening the upper and middle collection trays, and removing the graded steel shot.

[0019] The beneficial effects of this invention compared with the prior art are: (1) This invention sets up a three-stage synergistic grinding process of pre-grinding, impact grinding and fine grinding. First, the steel shot is initially dispersed and its edges are ground by the grinding plate with rough surface and uneven grinding column rotating in the steel shot box, which achieves preliminary regularization. Then, the steel shot is subjected to strong and multi-angle impact grinding by the high-speed rotating impact block with raised surface, which efficiently removes sharp edges. Finally, in the graded grinding cylinder, the lower grinding plate performs continuous fine grinding and tumbling to ensure surface smoothness. This progressive processing method can more systematically and thoroughly spheroidize the steel shot compared with the traditional single grinding mode, and improve the geometric consistency and surface quality of the steel shot. (2) The feeding mechanism set up in this invention combines the power source with the feeding action. The central motor drives the piston while driving the impact mechanism to generate airflow. This airflow not only serves as the power to accurately blow the steel shot from the shot feeding pipe into the impact cylinder, completing the pneumatic conveying, but its power source also drives the steel shot synchronously through the transmission belt. The pre-grinding action in the shot box, and the airflow conveying method avoids the common problems of material jamming and blockage in mechanical conveying, ensuring the continuity and stability of feeding; (3) The classification mechanism set in this invention enables the steel shot to be finely ground in the grinding cylinder, and then pass through the fixed perforated plate, the upper perforated plate and the middle perforated plate for multi-level vibration screening. The perforated plates with different apertures can separate the steel shot according to size in real time and continuously, and collect them in the upper, middle and lower collection trays respectively; (4) The classification mechanism set in this invention is movable as a whole. First, it is convenient for maintenance. When it is necessary to replace the worn grinding plate, perforated plate or clean the inside, the entire classification module can be moved out. The operating space is large and the maintenance is convenient, which greatly reduces the downtime; Second, it enhances the production flexibility. After completing a batch of processing, the classification module full of steel shot can be quickly moved away and the empty module can be replaced to continue the operation. It realizes the parallel processing and material turnover, which is conducive to the organization and efficiency improvement of continuous production operations. The setting of the vibrator effectively prevents the screen hole blockage and ensures the reliability of the classification process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the feeding mechanism structure of the present invention. Figure 1 .

[0022] Figure 3 This is a schematic diagram of the feeding mechanism structure of the present invention. Figure 2 .

[0023] Figure 4 This is a schematic diagram of the feeding mechanism structure of the present invention. Figure 3 .

[0024] Figure 5 This is a schematic diagram of the impact mechanism structure of the present invention. Figure 1 .

[0025] Figure 6 This is a schematic diagram of the impact mechanism structure of the present invention. Figure 2 .

[0026] Figure 7 This is a schematic diagram of the hierarchical mechanism of the present invention. Figure 1 .

[0027] Figure 8 This is a schematic diagram of the hierarchical mechanism of the present invention. Figure 2 .

[0028] Figure 9 This is a schematic diagram of the hierarchical mechanism of the present invention. Figure 3 .

[0029] Reference numerals: 101-Main frame; 102-Fixing frame; 103-Impact cylinder; 104-Sealing box; 105-Central motor; 106-Motor frame; 107-Main drive belt; 108-Intermediate shaft; 109-Side drive belt; 110-Steel shot box; 111-Distribution shaft; 112-Inlet hopper; 113-Grinding plate; 114-Grinding column; 115-Side extension plate; 116-Feeding pipe; 117-Shot feeding pipe; 118-Air blowing pipe; 119-Eccentric turntable; 120-Rotating connecting rod; 121-Eccentric column; 122-External air pipe; 123-Inner piston rod; 124-Connecting hole; 125-Bottom roller; 126-Side connecting pipe; 201-Inner orifice plate; 202-Feeding pipe; 203-Impact column; 204-Impact gear; 205-Impact block; 206-Center gear; 301-Grinding cylinder; 302-Side top shaft; 303-Top shaft spring; 304-Side top shaft bracket; 305-Grinding motor; 306-Upper collecting plate; 307-Middle collecting plate; 308-Lower collecting plate; 309-Moving trolley; 310-Moving roller; 311-Fixed orifice plate; 312-Lower grinding plate; 313-Lower grinding column; 314-Upper orifice plate; 315-Middle orifice plate; 316-Lower collecting plate; 317-Vibrator; 318-Rotator frame. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example: Reference Figures 1-9 A long-life steel shot grading and rounding device includes a feeding mechanism for feeding steel shot and a main frame 101. The main frame 101 is provided with an impact mechanism for preliminary rounding of steel shot and a grading mechanism for graded rounding of steel shot. The feeding mechanism includes a fixed frame 102 fixedly installed on the main frame 101, an impact cylinder 103 fixedly installed on the fixed frame 102, a motor frame 106 fixedly installed on the top of the impact cylinder 103, and a central motor 105 fixedly installed on the motor frame 106.

[0032] like Figures 2-4 As shown, the feeding mechanism also includes two sealing boxes 104 fixedly installed on the main frame 101. The sealing box 104 has a hollow structure inside. Two intermediate rotating shafts 108 are rotatably installed on the impact cylinder 103. The central motor 105 drives the intermediate rotating shafts 108 to rotate through the main drive belt 107. An eccentric turntable 119 is fixedly installed below the intermediate rotating shafts 108. An eccentric column 121 is eccentrically set on the eccentric turntable 119. Bottom rollers 125 are rotatably installed at the bottom of the main frame 101.

[0033] like Figures 2-4 As shown, the feeding mechanism also includes an external air pipe 122 fixedly installed on the sealing box 104. The external air pipe 122 communicates with the inside of the sealing box 104. An inner piston rod 123 is slidably installed inside the external air pipe 122. A connecting hole 124 is provided on the external air pipe 122. A rotating connecting rod 120 is rotatably installed on the inner piston rod 123. The rotating connecting rod 120 is rotatably installed with the eccentric column 121.

[0034] like Figures 2-4 As shown, the feeding mechanism also includes four side connecting pipes 126 fixedly installed on the side of the impact cylinder 103, two air blowing pipes 118 fixedly installed on the sealing box 104, and shot feeding pipes 117 fixedly installed on the air blowing pipes 118. The shot feeding pipes 117 are fixedly installed with the side connecting pipes 126.

[0035] like Figures 2-4 As shown, the feeding mechanism also includes four side extension plates 115 fixedly installed on the side of the impact cylinder 103. A steel shot box 110 is fixedly installed on the side extension plates 115. An inlet hopper 112 is fixedly installed on the steel shot box 110. A material distribution shaft 111 is rotatably installed inside the steel shot box 110. A side transmission belt 109 is wound around the middle rotating shaft 108 and the material distribution shaft 111. A grinding plate 113 is fixedly installed on the material distribution shaft 111. The upper and lower surfaces of the grinding plate 113 are rough surfaces. The grinding plate 113 is located in the steel shot box 110. Multiple grinding columns 114 are unevenly arranged below the grinding plate 113. A discharge hole is provided at the center of the bottom of the steel shot box 110. A feeding pipe 116 is fixedly installed below the discharge hole. The feeding pipe 116 is fixedly installed with the shot feeding pipe 117.

[0036] The steel shot to be processed is placed into four steel shot boxes 110 through the hopper 112. The steel shot is located in the steel shot boxes 110. The central motor 105 drives the intermediate rotating shaft 108 to rotate through the main drive belt 107. The intermediate rotating shaft 108 drives the eccentric turntable 119 to rotate. The eccentric turntable 119 drives the eccentric column 121 to rotate eccentrically. The eccentric column 121 drives the inner piston rod 123 to slide back and forth in the outer air pipe 122 through the rotating connecting rod 120. When the inner piston rod 123 moves towards the sealing box 104, it blows air into the sealing box 104, sealing the... Air inside the box 104 is pushed into the main frame 101 through the blast pipe 118, the shot delivery pipe 117, and the side connecting pipe 126. When the inner piston rod 123 moves away from the sealing box 104, and when the inner piston rod 123 moves to the outside of the connecting hole 124, the inside of the sealing box 104 is connected to the outside. That is, when the inner piston rod 123 slides back and forth in the outer air pipe 122, the air inside the sealing box 104 is continuously blasted into the main frame 101 through the blast pipe 118, the shot delivery pipe 117, and the side connecting pipe 126.

[0037] While the air in the sealing box 104 is blown into the main frame 101, the intermediate rotating shaft 108 drives the material distribution shaft 111 and the grinding plate 113 to rotate through the side transmission belt 109. The grinding plate 113 uses the rough surfaces above and below to cooperate with the bottom plate of the shot box 110 to perform preliminary grinding on the steel shot. Then, the steel shot is pushed by the uneven grinding column 114. The steel shot then enters the feed pipe 116 from the drop hole at the center of the shot box 110. The steel shot then falls to the lower end of the shot delivery pipe 117. The air flowing in the shot delivery pipe 117 sends the steel shot into the impact cylinder 103.

[0038] like Figure 5 , Figure 6 As shown, the impact mechanism includes a central gear 206 fixedly mounted on the motor shaft of the central motor 105, four impact columns 203 rotatably mounted on the impact cylinder 103, impact blocks 205 and impact gears 204 fixedly mounted on the impact columns 203, multiple protrusions on the surface of the impact blocks 205, the impact gears 204 meshing with the central gear 206, a feed pipe 202 at the bottom of the impact cylinder 103, and an inner hole plate 201 fixedly mounted inside the fixed frame 102, with multiple holes on the inner hole plate 201.

[0039] When the central motor 105 rotates, it also drives the central gear 206 to rotate. The central gear 206 drives the impact gear 204, impact column 203 and impact block 205 to rotate. After the steel shot is pushed into the impact cylinder 103, the steel shot comes into contact with the impact block 205 and is impacted and ground by the impact block 205. Then the steel shot falls through the hole of the inner plate 201 and is discharged from the feed pipe 202 into the grinding cylinder 301.

[0040] like Figures 7-9 As shown, the grading mechanism includes a grinding cylinder 301 located below the main frame 101. A fixing plate 311 with multiple holes is provided inside the grinding cylinder 301. An upper collecting plate 306 is fixedly installed below the grinding cylinder 301. An upper collecting plate 314 with multiple holes is provided inside the upper collecting plate 306. A middle collecting plate 307 with multiple holes is fixedly installed below the upper collecting plate 306. A middle collecting plate 315 with multiple holes is provided inside the middle collecting plate 307. A lower collecting plate 308 with a lower collecting plate 316 is fixedly installed below the middle collecting plate 307. The size of the holes on the upper collecting plate 314 is larger than the size of the holes on the middle collecting plate 315.

[0041] like Figures 7-9 As shown, the grading mechanism also includes a movable trolley 309 fixedly installed below the lower collection tray 308. A rotating wheel frame 318 is rotatably installed below the movable trolley 309. A movable roller 310 is rotatably installed on the rotating wheel frame 318. A grinding motor 305 is fixedly installed inside the grinding cylinder 301. A lower grinding plate 312 is fixedly installed on the motor shaft of the grinding motor 305. Both the upper and lower surfaces of the lower grinding plate 312 are rough surfaces. Multiple lower grinding columns 313 are unevenly arranged below the lower grinding plate 312.

[0042] like Figures 7-9 As shown, the grading mechanism also includes two side top shaft brackets 304 fixedly installed on the moving trolley 309. A side top shaft 302 is slidably installed on the side top shaft bracket 304. A top shaft spring 303 is provided between the side top shaft 302 and the side top shaft bracket 304. A vibrator 317 is fixedly installed on the moving trolley 309. The vibrator 317 is fixedly installed with the upper hole plate 314, the middle hole plate 315 and the fixed hole plate 311.

[0043] After the steel shot enters the grinding cylinder 301, the grinding motor 305 drives the lower grinding plate 312 to rotate. The lower grinding plate 312 further rounds the steel shot, and the lower grinding column 313 continuously pushes the steel shot. When the diameter of the steel shot is smaller than the size of the hole in the fixed hole plate 311, the steel shot falls onto the upper hole plate 314. Steel shot larger than the size of the hole in the upper hole plate 314 will stay on the upper hole plate 314, and steel shot smaller than the size of the hole in the upper hole plate 314 will fall onto the middle hole plate 315. Subsequently, steel shot larger than the size of the hole in the middle hole plate 315 will stay on the middle hole plate 315, and steel shot smaller than the size of the hole in the middle hole plate 315 will fall onto the lower collecting plate 316.

[0044] Vibration is generated by vibrator 317, which facilitates the steel shot to fall from the holes of fixed hole plate 311, upper hole plate 314 and middle hole plate 315. When the grinding cylinder 301 vibrates, it will push the side top shaft 302 to slide along the side top shaft frame 304. When the operation is completed, the grading mechanism can be moved away from the main frame 101 by moving roller 310, and the upper collection plate 306 and middle collection plate 307 can be opened to remove the graded steel shot.

[0045] The working principle of the long-life steel shot grading and rounding device disclosed in this invention is as follows: Steel shot to be processed is placed into four steel shot boxes 110 through an inlet hopper 112. The steel shot is located in the steel shot boxes 110. A central motor 105 drives an intermediate rotating shaft 108 to rotate via a main drive belt 107. The intermediate rotating shaft 108 drives an eccentric turntable 119 to rotate. The eccentric turntable 119 drives an eccentric column 121 to rotate eccentrically. The eccentric column 121 drives an inner piston rod 123 to slide reciprocally within an outer air pipe 122 via a rotating connecting rod 120. When the inner piston rod 123 moves towards the sealing box 104, it... Air is blown into the sealing box 104, and the air inside the sealing box 104 is pushed into the main frame 101 through the air blowing pipe 118, the shot delivery pipe 117 and the side connecting pipe 126. When the inner piston rod 123 moves away from the sealing box 104, when the inner piston rod 123 moves to the outside of the connecting hole 124, the inside of the sealing box 104 is connected to the outside. That is, when the inner piston rod 123 slides back and forth in the outer air pipe 122, the air inside the sealing box 104 is continuously blown into the main frame 101 through the air blowing pipe 118, the shot delivery pipe 117 and the side connecting pipe 126.

[0046] While the air in the sealing box 104 is blown into the main frame 101, the intermediate rotating shaft 108 drives the material distribution shaft 111 and the grinding plate 113 to rotate through the side transmission belt 109. The grinding plate 113 uses the rough surfaces above and below to cooperate with the bottom plate of the shot box 110 to perform preliminary grinding on the steel shot. Then, the steel shot is pushed by the uneven grinding column 114. The steel shot then enters the feed pipe 116 from the drop hole at the center of the shot box 110. The steel shot then falls to the lower end of the shot delivery pipe 117. The air flowing in the shot delivery pipe 117 sends the steel shot into the impact cylinder 103.

[0047] When the central motor 105 rotates, it also drives the central gear 206 to rotate. The central gear 206 drives the impact gear 204, impact column 203 and impact block 205 to rotate. After the steel shot is pushed into the impact cylinder 103, the steel shot comes into contact with the impact block 205 and is impacted and ground by the impact block 205. Then the steel shot falls through the hole of the inner plate 201 and is discharged from the feed pipe 202 into the grinding cylinder 301.

[0048] After the steel shot enters the grinding cylinder 301, the grinding motor 305 drives the lower grinding plate 312 to rotate. The lower grinding plate 312 further rounds the steel shot, and the lower grinding column 313 continuously pushes the steel shot. When the diameter of the steel shot is smaller than the size of the hole in the fixed hole plate 311, the steel shot falls onto the upper hole plate 314. Steel shot larger than the size of the hole in the upper hole plate 314 will stay on the upper hole plate 314, and steel shot smaller than the size of the hole in the upper hole plate 314 will fall onto the middle hole plate 315. Subsequently, steel shot larger than the size of the hole in the middle hole plate 315 will stay on the middle hole plate 315, and steel shot smaller than the size of the hole in the middle hole plate 315 will fall onto the lower collecting plate 316.

[0049] Vibration is generated by vibrator 317, which facilitates the steel shot to fall from the holes of fixed hole plate 311, upper hole plate 314 and middle hole plate 315. When the grinding cylinder 301 vibrates, it will push the side top shaft 302 to slide along the side top shaft frame 304. When the operation is completed, the grading mechanism can be moved away from the main frame 101 by moving roller 310, and the upper collection plate 306 and middle collection plate 307 can be opened to remove the graded steel shot.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A long-life steel shot grading and rounding device, comprising a feeding mechanism for feeding steel shots and a main body frame (101), characterized in that: The main frame (101) is provided with an impact mechanism for preliminary rounding of steel shot and a grading mechanism for graded rounding of steel shot. The feeding mechanism includes a fixed frame (102) fixedly installed on the main frame (101), an impact cylinder (103) fixedly installed on the fixed frame (102), a motor frame (106) fixedly installed on the top of the impact cylinder (103), and a central motor (105) fixedly installed on the motor frame (106).

2. The long-life steel shot grading and rounding device according to claim 1, characterized in that: The feeding mechanism also includes two sealing boxes (104) fixedly installed on the main frame (101). The sealing boxes (104) are hollow inside. Two intermediate rotating shafts (108) are rotatably installed on the impact cylinder (103). The central motor (105) drives the intermediate rotating shafts (108) to rotate through the main drive belt (107). An eccentric turntable (119) is fixedly installed below the intermediate rotating shafts (108). An eccentric column (121) is eccentrically set on the eccentric turntable (119). Bottom rollers (125) are rotatably installed at the bottom of the main frame (101).

3. The long-life steel shot grading and rounding device according to claim 2, characterized in that: The feeding mechanism also includes an external air pipe (122) fixedly installed on the sealing box (104). The external air pipe (122) is connected to the inside of the sealing box (104). An internal piston rod (123) is slidably installed inside the external air pipe (122). A connecting hole (124) is provided on the external air pipe (122). A rotating connecting rod (120) is rotatably installed on the internal piston rod (123). The rotating connecting rod (120) is rotatably installed with the eccentric column (121).

4. The long-life steel shot grading and rounding device according to claim 3, characterized in that: The feeding mechanism also includes four side connecting pipes (126) fixedly installed on the side of the impact cylinder (103), two air blowing pipes (118) fixedly installed on the sealing box (104), and a shot feeding pipe (117) fixedly installed on the air blowing pipe (118). The shot feeding pipe (117) is fixedly installed with the side connecting pipes (126).

5. The long-life steel shot grading and rounding device according to claim 4, characterized in that: The feeding mechanism also includes four side extension plates (115) fixedly installed on the side of the impact cylinder (103). A steel shot box (110) is fixedly installed on the side extension plates (115). An inlet hopper (112) is fixedly installed on the steel shot box (110). A distributing shaft (111) is rotatably installed inside the steel shot box (110). A side drive belt (109) is wound around the intermediate rotating shaft (108) and the distributing shaft (111). A grinding plate (113) is fixedly installed on the steel shot box (110). The upper and lower surfaces of the grinding plate (113) are rough surfaces. The grinding plate (113) is located in the steel shot box (110). Multiple grinding columns (114) are unevenly arranged below the grinding plate (113). A discharge hole is provided at the center of the bottom of the steel shot box (110). An infeed pipe (116) is fixedly installed below the discharge hole. The infeed pipe (116) is fixedly installed with the shot delivery pipe (117).

6. The long-life steel shot grading and rounding device according to claim 1, characterized in that: The impact mechanism includes a central gear (206) fixedly mounted on the motor shaft of the central motor (105), four impact columns (203) rotatably mounted on the impact cylinder (103), impact blocks (205) and impact gears (204) fixedly mounted on the impact columns (203), the surface of the impact blocks (205) is provided with multiple protrusions, the impact gears (204) mesh with the central gears (206), the bottom of the impact cylinder (103) is provided with a feed pipe (202), and an inner hole plate (201) is fixedly mounted inside the fixed frame (102), the inner hole plate (201) is provided with multiple holes.

7. The long-life steel shot grading and rounding device according to claim 1, characterized in that: The grading mechanism includes a grinding cylinder (301) disposed below the main frame (101). A fixed perforated plate (311) is disposed inside the grinding cylinder (301). The fixed perforated plate (311) has multiple holes. An upper collecting plate (306) is fixedly installed below the grinding cylinder (301). An upper perforated plate (314) is disposed inside the upper collecting plate (306). The upper perforated plate (314) has multiple holes. A middle collecting plate (307) is fixedly installed below the upper collecting plate (306). A middle perforated plate (315) is disposed inside the middle collecting plate (307). The middle perforated plate (315) has multiple holes. A lower collecting plate (308) is fixedly installed below the middle collecting plate (307). A lower collecting plate (316) is disposed inside the lower collecting plate (308). The size of the holes on the upper perforated plate (314) is larger than the size of the holes on the middle perforated plate (315).

8. The long-life steel shot grading and rounding device according to claim 7, characterized in that: The grading mechanism also includes a mobile trolley (309) fixedly installed below the lower collection tray (308). A rotating frame (318) is rotatably installed below the mobile trolley (309). A mobile roller (310) is rotatably installed on the rotating frame (318). A grinding motor (305) is fixedly installed inside the grinding cylinder (301). A lower grinding plate (312) is fixedly installed on the motor shaft of the grinding motor (305). The upper and lower surfaces of the lower grinding plate (312) are both rough surfaces. Multiple lower grinding columns (313) are unevenly arranged below the lower grinding plate (312).

9. A long-life steel shot grading and rounding device according to claim 8, characterized in that: The grading mechanism also includes two side top shaft brackets (304) fixedly installed on the mobile trolley (309). A side top shaft (302) is slidably installed on the side top shaft bracket (304). A top shaft spring (303) is provided between the side top shaft (302) and the side top shaft bracket (304). A vibrator (317) is fixedly installed on the mobile trolley (309). The vibrator (317) is fixedly installed with the upper hole plate (314), the middle hole plate (315) and the fixed hole plate (311).

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