A suspended shot-blasting machine with circulating self-separation cleaning

Abstract

The application provides a circulating self-separation cleaning suspension shot blasting machine, which comprises a tunnel shot blasting shell, front and rear sides of the tunnel shot blasting shell are provided with shot blasting vertical columns, each shot blasting vertical column is provided with a plurality of shot blasting impellers driven by a shot blasting driving motor; a shot collecting opening is formed in the bottom of the tunnel shot blasting shell, a shot separator is movably arranged below the shot collecting opening, the shot separator is provided with an upper separation cavity in the upper layer and a lower separation cavity in the lower layer, a plurality of first separation holes are formed in the bottom of the upper separation cavity, a plurality of second separation holes are formed in the bottom of the lower separation cavity, and a vibrating motor is installed at one end of the shot collecting opening; a shot lifter is arranged outside the tunnel shot blasting shell, the lower end of the shot lifter is communicated with the lower separation cavity, and a shot storage shell is arranged at the upper end of the tunnel shot blasting shell. The shot is cleaned by using the vibrating screen separation mode at the bottom, the structure is simpler, the space occupation is smaller, the cost is lower, and the maintenance is easier.

Description

Technical Field

[0001] This invention belongs to the field of shot blasting machine technology, and relates to a suspended shot blasting machine with circulating self-separation and cleaning. Background Technology

[0002] Shot blasting machines, as efficient, economical, and widely used surface cleaning equipment, play a crucial role in heavy industries such as machinery manufacturing, construction engineering, shipbuilding, and steel structure processing. Their core working principle utilizes the centrifugal force generated by a high-speed rotating shot blaster to accelerate the shot to extremely high speeds and propel it at a specific angle onto the surface of the workpiece. The kinetic energy and cutting action generated by the high-speed impact of the shot effectively peels off and removes oxide scale, rust layers, old paint films, and casting sand and other contaminants from the workpiece surface, achieving a certain level of cleanliness and roughness. This not only significantly improves the adhesion of paint films in subsequent coating processes but also enhances the fatigue strength of the workpiece through surface strengthening effects. In modern, automated production processes, shot blasting machines are typically equipped with complex shot recycling systems to reduce abrasive consumption costs and meet stringent environmental emission standards. The system uses a bucket elevator to vertically transport the shot mixture (including qualified shot, crushed shot, oxide scale, welding slag and dust, etc.) scattered at the bottom of the cleaning chamber to the top. Then, a separator is used to sort the mixture, and the qualified shot that can still be used is sent back to the shot blaster for recycling.

[0003] However, existing shot blasting machines still face significant technical bottlenecks and limitations in the shot recovery and cleaning separation stages. To accurately separate reusable, qualified shot from the complex recovery mixture, current technologies typically employ a series operation of air separation devices combined with multi-stage mechanical conveying equipment. While air separation devices can effectively separate dust and extremely light fine impurities by utilizing differences in airflow suspension velocity, traditional methods often fall short when dealing with denser or larger heavy impurities (such as large pieces of oxide scale detached from workpiece surfaces, spattered welding slag, broken bolts, etc.), making it difficult to effectively distinguish and remove them from qualified shot. Once these large particles enter the circulation system, they not only cause unstable shot blasting quality but also easily jam the shot blaster or exacerbate blade wear, even leading to equipment damage. Furthermore, to achieve material transfer and multi-stage separation, traditional equipment often relies on large and complex mechanical conveying structures. This not only results in a large overall footprint and low space utilization but also significantly increases the equipment failure rate due to numerous transmission components, greatly increasing manufacturing costs and the difficulty of subsequent maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a suspended shot blasting machine with a self-separating and cleaning circulation system. The shot is effectively separated by a vibrating screen at the bottom, making the shot blasting machine more stable in operation. At the same time, its structure is simpler, occupies less space, has lower cost, and is easier to maintain.

[0005] To solve the above-mentioned technical problems, the present invention provides a suspended shot blasting machine with circulating self-separation cleaning, including a tunnel shot blasting shell with openings at both the front and rear ends, a conveyor chain arranged along its length above the tunnel shot blasting shell, a passage slide arranged along its length at the upper end of the tunnel shot blasting shell, vertically arranged shot blasting columns arranged on both the front and rear sides inside the tunnel shot blasting shell, a vertically arranged conveyor channel arranged in each shot blasting column, multiple shot blasting chambers arranged in each shot blasting column, multiple guide channels arranged obliquely downwards and correspondingly connected to the shot blasting chambers on its edge, multiple shot blasting channels connected to the middle of the tunnel shot blasting shell in each shot blasting chamber, a shot blasting impeller rotatably connected in each shot blasting chamber, and multiple shot blasting drive motors installed outside each shot blasting column for correspondingly driving the rotation of the shot blasting impeller;

[0006] The bottom of the tunnel shot blasting shell is provided with a shot collection port, and a shot separator is movably arranged below the shot collection port. The unit separator is provided with an upper separation chamber located in the upper layer and a lower separation chamber located in the lower layer. The upper end of the upper separation chamber is open to catch the shot falling from the shot collection port. The bottom of the upper separation chamber is provided with a number of primary separation holes, and the bottom of the lower separation chamber is provided with a number of secondary separation holes. The diameter of the secondary separation holes is smaller than the diameter of the primary separation holes. A vibration motor is installed at one end of the shot collection port.

[0007] A shot lifter is vertically arranged on the outer side of the tunnel shot blasting shell. The lower end of the shot lifter is connected to the middle of the lower separation chamber. A shot storage shell is arranged at the upper end of the tunnel shot blasting shell. The lower end of the shot storage shell is connected to two feeding channels downward. The lower end of each feeding channel is connected to the upper end of the corresponding conveying channel.

[0008] By adopting the above technical solution, the workpieces to be cleaned are first suspended sequentially on a conveyor chain. After the equipment is started, the conveyor chain runs continuously, driving the workpieces at a constant speed into the tunnel shot blasting chamber along the slide rail. After the workpieces enter the shot blasting area, the shot blasting impellers in the shot blasting columns on both sides rotate at high speed under the drive of the shot blasting drive motor. Qualified shot enters each shot blasting chamber through the conveyor channel and guide channel, and is thrown out along the shot blasting channel by the high-speed rotating shot blasting impellers, impacting the surface of the workpiece at high speed to remove the oxide layer, rust, impurities and other attachments on the surface of the workpiece, completing the surface cleaning operation. After the cleaning operation is completed, the workpiece continues to move along the conveyor chain and leaves the equipment from the other end of the tunnel shot blasting chamber.

[0009] Used shot, along with impurities and dust generated by the impact, falls to the bottom of the tunnel shot blasting shell. Under the collection action of the funnel-shaped guide surface, it falls into the shot separator below through the shot collection port. The vibration motor starts, driving the shot separator to reciprocate along the connecting slide rail. The mixture falling into the upper separation chamber gradually moves under the action of vibration: shot of qualified size falls into the lower separation chamber through the primary separation hole on the inclined side, while large particles of impurities are blocked in the upper separation chamber; the shot mixture entering the lower separation chamber, under the action of vibration, the fine dust mixed in falls through the secondary separation hole with a smaller aperture, while qualified shot remains in the lower separation chamber.

[0010] Qualified shot entering the receiving channel falls into the shot elevator and is conveyed upwards. Finally, it is sent from the upper outlet of the elevator channel into the shot storage shell for temporary storage. The temporarily stored qualified shot is then sent back into the conveying channel in the shot blasting column through two feeding channels to enter the next round of shot blasting operation. This achieves the self-separation and cleaning of shot and continuous recycling.

[0011] The present invention is further configured such that both sides of the shot separator are provided with connecting slide bars arranged along their length direction, and the bottom of the tunnel shot blasting shell is provided with two connecting slide rails that are slidably connected to the connecting slide bars one by one.

[0012] The present invention is further configured such that a first separation and collection trough with an upper opening is provided below the tunnel shot blasting shell at one end of the shot separator, and a first separation and discharge channel communicating with the upper separation chamber is provided at one end of the shot separator. The first separation and discharge channel is located above the first separation and collection trough, and a second separation and collection trough with an upper opening is provided below the shot separator.

[0013] The present invention is further configured such that the bottom of the upper separation cavity protrudes upward to form several displacement ramps distributed along its length and approximately in the shape of a V, one end of each displacement ramp protruding upward faces the first separation collection groove, and the end of each displacement ramp away from its tip is vertically downward, and the primary separation hole is opened on the inclined side of the displacement ramp.

[0014] The present invention is further configured such that the shot lifter includes a vertically arranged lifting channel, two vertically arranged lifting chains are movably connected in the lifting channel, and lifting drive sprockets are rotatably connected to both ends of each lifting chain in the lifting channel (40), and a lifting drive motor for driving the lifting drive sprockets to rotate is installed outside the lifting channel. Multiple shot lifting buckets distributed along the length direction are connected to the two lifting chains. A receiving channel extending into the tunnel shot blasting shell is provided inward at the lower end of the lifting channel. The receiving channel is obliquely upward in the direction away from the lifting channel. A second separation discharge channel extending into the free end of the receiving channel is provided outward in the shot separator. The upper end of the lifting channel is connected to the upper end of the shot storage shell.

[0015] The present invention is further configured such that a sealing belt is movably connected to both sides of the slide at the upper end of the tunnel shot blasting shell, and a drive wheel is rotatably connected to both ends of each sealing belt in the tunnel shot blasting shell. A sealing drive motor is installed at each sealing belt in the tunnel shot blasting shell, and the power output shaft of each sealing drive motor is connected to one of the drive wheels.

[0016] The conveyor chain is connected to multiple connecting blocks distributed along its length. Each connecting block has a downward-facing suspension shaft, and each suspension shaft has a hanging ring at its lower end. Each sealing belt has multiple C-shaped slots on its outer side that correspond to the suspension shaft.

[0017] The openings on both the front and rear sides of the tunnel shot blasting shell are provided with multiple layers of blocking layers. Each blocking layer includes multiple flexible baffles that are symmetrically connected to the inner wall of the tunnel shot blasting shell, with the free edges of two opposing flexible baffles staggered front and back.

[0018] The present invention is further configured such that each sealing belt has several movable slits distributed along its length on its outer side.

[0019] The invention is further configured such that each suspension shaft is rotatably connected to the lower end of the corresponding connecting block, and each suspension shaft has multiple circumferentially distributed transmission tooth grooves on its outer periphery. On one side of the slide rail, multiple rotating drive teeth distributed along its length direction are provided at the shot blasting column.

[0020] The invention is further configured such that a connecting shaft is vertically provided on the inner wall of the tunnel shot blasting shell at each barrier layer; each flexible baffle includes a connecting piece connected to the corresponding connecting shaft and multiple flexible baffles connected to the free edge of the connecting piece; each connecting piece is provided with a rotating collar rotatably connected to the corresponding connecting shaft; each connecting shaft is fitted with multiple torsion springs corresponding one-to-one with the rotating collars; both ends of each torsion spring are connected to the corresponding connecting shaft and the corresponding rotating collar; the elastic force of the torsion springs causes the flexible baffle to have a tendency to rotate outward toward the opening of the tunnel shot blasting shell; a vertical limiting baffle is vertically provided on the inner wall of the tunnel shot blasting shell at each connecting shaft; the vertical limiting baffle is used to prevent the flexible baffle from rotating outward, so that it can rotate outward to a maximum of being perpendicular to the inner wall of the tunnel shot blasting shell.

[0021] The invention is further configured such that the bottom of the tunnel shot blasting shell converges downward toward the shot collection port.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Firstly, this invention uses vibrating screening to replace the traditional separation scheme of air separation combined with multi-stage conveying. The three-stage separation is completed directly below the shot collection port: large particles of impurities are intercepted by the primary separation hole and discharged in a directional manner, qualified shot is intercepted by the secondary separation hole, and fine dust is collected through the secondary separation hole. The entire separation process has a simple structure and does not require a large air separation unit and complex conveying pipelines, which greatly reduces the overall footprint of the equipment and reduces the manufacturing cost and maintenance difficulty of the equipment.

[0024] Secondly, compared to the problem of traditional air separation methods not being effective in separating large, heavy particles, this invention can reliably remove large particles from the recycled mixture through precise grading of the sieve aperture. This avoids large particles from entering the circulation system and jamming the shot blasting impeller or aggravating component wear, effectively extending the service life of vulnerable parts of the equipment and improving the stability and cleaning quality of shot blasting operations.

[0025] Thirdly, by setting up a dynamic sealing belt and staggered flexible baffles, it not only ensures that the connecting shaft of the suspended workpiece can move smoothly with the conveyor chain, but also achieves reliable sealing of the slide and the openings at both ends, which greatly reduces the splashing of dust and shot during shot blasting, improves the cleanliness of the working environment, and reduces the amount of shot loss.

[0026] Fourth, by setting transmission tooth grooves on the connecting shaft and matching rotation drive teeth on the slide side, the workpiece will automatically rotate when passing through the shot blasting operation area, which can ensure that all surfaces of the workpiece can be evenly impacted by the shot, avoid dead corners in cleaning, and effectively improve the uniformity and efficiency of shot blasting.

[0027] Fifth, the present invention forms a closed-loop bullet circulation system, and the entire process of separation, lifting and reuse is completed automatically without the need for manual intervention in recycling and sorting operations. It has a high degree of automation, which can effectively reduce the labor intensity of workers, reduce bullet wear, improve the economic efficiency of equipment operation, and meet the current environmental protection and efficiency requirements of industrial production. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a partial sectional view used to show the internal structure of the tunnel shot blasting shell;

[0030] Figure 3 yes Figure 2 Enlarged view of A in the middle;

[0031] Figure 4 yes Figure 2 Enlarged view of B in the middle;

[0032] Figure 5 Used to demonstrate the connection between the flexible baffle, the connecting shaft, and the vertical limiting stop bar;

[0033] Figure 6 This is used to demonstrate the connection between the shot separator at the bottom of the tunnel shot blasting shell and the first separation and collection tank, the second separation and collection tank, and the shot lifter.

[0034] Figure 7 Used to demonstrate the connection between the projectile separator and the first and second separation and collection tanks;

[0035] Figure 8 This is a partial cross-sectional view used to show the internal structure of the projectile separator;

[0036] Figure 9 This is a partial sectional view used to show the internal structure of the projectile elevator;

[0037] Figure 10 Used to demonstrate the connection between the connecting block and the suspension shaft.

[0038] The components include: 1. Tunnel shot blasting shell; 2. Conveyor chain; 3. Passing slide; 4. Shot blasting column; 5. Conveying channel; 6. Shot blasting chamber; 7. Guide channel; 8. Shot blasting channel; 9. Shot blasting impeller; 10. Shot blasting drive motor; 11. Sealing belt; 12. Drive wheel; 13. Sealing drive motor; 14. Movable cut; 15. Connecting block; 16. Suspension shaft; 17. Hanging ring; 18. C-shaped groove; 19. Transmission gear groove; 20. Rotary drive gear; 21. Connecting shaft; 22. Connecting piece; 23. Flexible stop bar; 24. Rotating collar; 25. Torsion spring; 26. Vertical limit stop bar. 27. Shot collection port; 28. Shot separator; 29. ​​Upper separation chamber; 30. Lower separation chamber; 31. Primary separation hole; 32. Secondary separation hole; 33. Vibration motor; 34. Connecting slide bar; 35. Connecting slide rail; 36. First separation collection trough; 37. First separation discharge channel; 38. Second separation collection trough; 39. Displacement inclined platform; 40. Lifting channel; 41. Lifting chain; 42. Lifting drive sprocket; 43. Lifting drive motor; 44. Shot lifting bucket; 45. Receiving channel; 46. Second separation discharge channel; 47. Shot storage shell; 48. Feeding channel. Detailed Implementation

[0039] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the suspended shot blasting machine with cyclic self-separation cleaning proposed in this invention. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of the invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0040] Example, refer to Figure 1-10A circulating self-separating cleaning suspended shot blasting machine includes a tunnel shot blasting shell 1 with openings at both the front and rear ends. A conveyor chain 2 for conveying workpieces is arranged along the length of the tunnel shot blasting shell 1 above it. A passageway 3, extending along the length of the tunnel shot blasting shell 1, is provided at the upper end of the tunnel shot blasting shell 1 to allow the suspension shaft 16 for suspending workpieces to pass through. Inside the tunnel shot blasting shell 1, a shot blasting column 4 is vertically installed on both the front and rear sides, serving as the core support structure for the shot blasting operation. Each shot blasting column 4 has a vertically extending conveying channel 5 for conveying shot from top to bottom. The shot blasting column 4 also has multiple shot blasting chambers 6 distributed along its height. Each conveying channel 5 has multiple diagonally downward-facing guide channels 7, which are connected one-to-one with the edge shot blasting chambers 6, precisely guiding the shot to each shot blasting chamber 6. Each shot blasting chamber 6 is connected to multiple shot blasting channels 8 towards the center of the tunnel shot blasting shell 1, through which the shot is ejected. Inside each shot blasting chamber 6, a shot blasting impeller 9 is rotatably connected. Outside each shot blasting column 4, multiple shot blasting drive motors 10 are installed. These motors are connected one-to-one with the shot blasting impeller 9 and drive it to rotate at high speed. During operation, the shot blasting impeller 9 rotates at high speed, ejecting the shot that falls into it along the shot blasting channel 8 at extremely high speed, impacting and cleaning the surface of the workpiece that has passed through the housing, thus achieving efficient surface treatment.

[0041] At the upper end of the tunnel shot blasting housing 1, on both sides of the passageway 3, a flexible sealing belt 11 is movably connected. On the tunnel shot blasting housing 1, corresponding to both ends of each sealing belt 11, a drive wheel 12 is rotatably connected, engaging or frictionally contacting it. Furthermore, a sealing drive motor 13 is installed at the position of each sealing belt 11, and the power output shaft of each motor is directly connected to one of the drive wheels 12, thereby driving the sealing belt 11 to circulate. The two sealing belts 11 are tightly fitted together in the area directly above the passageway 3, forming an effective dynamic sealing barrier that seals the passageway opening and prevents dust generated during shot blasting from escaping. To ensure smooth and flexible movement under the drive of the drive wheel 12 even if the belt has a certain thickness, several movable slits 14 are also opened along the length of each sealing belt 11 on its outer side, increasing the local flexibility of the belt.

[0042] Multiple connecting blocks 15, evenly spaced along the length of the conveyor chain 2, are connected to each connecting block 15. Each connecting block 15 is rotatably connected to a downward-facing suspension shaft 16, with a hanging ring 17 at the lower end of the suspension shaft 16 for suspending the workpiece. Notably, multiple matching C-shaped slots 18 are provided on the corresponding positions of the outer sides of the two sealing belts 11. When the suspension shaft 16 moves with the workpiece to the slide rail 3, the C-shaped slots 18 on the two belts close from both sides, perfectly fitting the suspension shaft 16. This design ensures that the suspension shaft 16 can be held by the sealing belts 11 and smoothly pass through the slide rail 3 while maintaining the sealing of the slide rail opening, effectively preventing dust leakage. To further enhance functionality, multiple evenly distributed circumferential transmission tooth grooves 19 are machined on the outer circumferential surface of each suspension shaft 16. On one side edge of the slide rail 3, near the shot blasting column 4, multiple rotating drive teeth 20 distributed along its length are provided. When the suspension shaft 16 is carried through this area by the sealing belt 11, the transmission tooth groove 19 on it will mesh or interfere with the stationary rotating drive tooth 20, which may drive the suspension shaft 16 and the suspended workpiece to rotate, so that all surfaces of the workpiece can be subjected to shot blasting treatment more evenly.

[0043] At both the front and rear openings of the tunnel shot blasting housing 1, three layers of sequentially arranged blocking layers are provided to maximize the closure of the openings and reduce the splashing of shot and dust when workpieces enter and exit. Each blocking layer includes multiple flexible baffles arranged symmetrically from left to right and connected to the inner wall of the tunnel shot blasting housing 1. A connecting shaft 21 is vertically fixed to the inner wall of each blocking layer. Each flexible baffle specifically includes a connecting piece 22 connected to the corresponding connecting shaft 21, and multiple flexible baffles 23 connected to the free edge of the connecting piece 22. A rotating collar 24 is provided on the connecting piece 22, which forms a rotatable connection with the corresponding connecting shaft 21. On each connecting shaft 21, a torsion spring 25 corresponding to each rotating collar 24 is also fitted, with both ends of each torsion spring 25 fixed to the connecting shaft 21 and the corresponding rotating collar 24, respectively. The elastic force provided by the torsion spring 25 ensures that the flexible baffle always has a tendency to rotate outward from the opening of the tunnel shot blasting housing 1. To limit its rotation range, vertical limiting strips 26 are also vertically installed on the inner wall of the tunnel shot blasting shell 1 at each connecting shaft 21. The free edges of the two opposing vertical limiting strips 26 are staggered in the front-back direction. The function of these vertical limiting strips 26 is to prevent the flexible baffle from rotating outward, limiting its maximum rotation angle to a position perpendicular to the inner wall of the tunnel shot blasting shell 1. When the connecting shaft 21 suspending the workpiece enters or leaves the tunnel shot blasting shell 1, the workpiece will push the flexible baffle to undergo elastic deformation or rotation inward, opening the passage; after the workpiece has completely passed, the flexible baffle quickly returns to its original position under the action of the torsion spring 25, re-closing the opening.

[0044] At the bottom center of the tunnel shot blasting shell 1, a narrow shot collection port 27 is formed along its entire length. The bottom of the shell is designed in a funnel shape that gradually narrows downwards towards this collection port, facilitating the collection of used shot and impurities. Below this shot collection port 27, a long strip-shaped shot separator 28 is movably installed for sorting the recovered materials. The shot separator is internally divided into upper and lower layers: an upper separation chamber 29 and a lower separation chamber 30. The upper opening of the upper separation chamber 29 is larger than that of the shot collection port 27 above, ensuring that all the mixture falling from the collection port can be completely caught. Numerous primary separation holes 31 are evenly distributed at the bottom of the upper separation chamber 29. These holes are designed to allow only shot of the correct size to pass through, while blocking larger impurities (such as larger fragments of workpieces) within the upper separation chamber 29. The lower separation chamber 30 receives the shot mixture that has passed through the primary separation holes 31, and its bottom has several secondary separation holes 32 with smaller diameters. The diameter of the secondary separation hole 32 is smaller than that of the primary separation hole 31. Its size is designed to prevent qualified projectiles from passing through, but to allow the passage of tiny dust particles mixed in with it, thereby achieving further separation of projectiles and dust.

[0045] To improve separation efficiency, a vibration motor 33 is installed at one end of the shot collection port 27. Simultaneously, each side of the shot separator 28 has a connecting slide bar 34 extending along its length, while two connecting rails 35, corresponding one-to-one with the connecting slide bars 34 and slidably engaged, are fixed at the bottom of the tunnel shot blasting housing 1. This sliding connection method allows the entire separator to reciprocate and slide along the connecting rails 35 with small amplitude when the vibration motor 33 starts and drives the shot separator 28 to vibrate. This not only helps the shot and impurities to be evenly distributed within the separation chamber but also significantly improves their efficiency in passing through the various separation orifices, preventing blockage.

[0046] Below the tunnel shot blasting shell 1, at one end of the shot separator 28, there is a first separation collection tank 36 with an open top. Large particles that are blocked by the primary separation holes 31 and cannot pass through will eventually be discharged from one end of the separator under the action of vibration and their own gravity, falling into this first separation collection tank 36 and being collected. One end of the shot separator 28 is also connected to a first separation discharge channel 37, which is directly connected to the upper separation chamber 29, providing a path for the discharge of large particles. The separation discharge channel is precisely located above the first separation collection tank 36, which facilitates guiding the separated large particles to slide directly into the collection tank. This layout design ensures a smooth impurity collection path and optimizes the compactness of the overall structure. Directly below the shot separator 28, there is a second separation and collection tank 38 with its upper end completely open to receive fine dust. The lateral dimension of this collection tank is precisely designed to be significantly larger than the coverage area of ​​the shot separator 28, thereby ensuring that all small dust particles and tiny impurities falling through the secondary separation holes 32 can be captured by the second separation and collection tank 38 without any omissions when the shot separator 28 is in continuous vibration operation. This effectively prevents dust from escaping and improves the efficiency and cleanliness of separation and collection.

[0047] At the bottom of the upper separation chamber 29 of the device, several displacement ramps 39, arranged regularly along the length of the chamber and with a cross-sectional shape approximately V-shaped, are carefully designed. Each displacement ramp 39 has an upward-protruding tip, and the tips of all ramps point in the same direction toward the first separation collection tank 36, forming a clear impurity guiding path. At the same time, each displacement ramp 39 has a steep, vertically downward end face on the side away from its tip. The primary separation hole 31 is cleverly located on the inclined side of these displacement ramps 39. When the projectile separator 28 reciprocates regularly along the connecting slide rail 35, large particles of impurities can slide relatively smoothly over the gentle tip of the displacement ramp 39, but will be significantly obstructed when encountering the steep vertical end face at the other end of the ramp. This unique structural design, combined with the vibration effect, allows large particles of impurities remaining in the upper separation chamber 29 to slide continuously along the displacement ramp 39 under vibration excitation. As the impurities accumulate, they eventually pass smoothly through the first separation discharge channel 37 and fall precisely into the first separation collection tank 36 below, achieving effective separation and directional collection of large particles of impurities.

[0048] A robust shot blasting shell 1 is vertically mounted on the outside of the tunnel blasting housing 1. The core of this shell is a vertically oriented lifting channel 40. Inside the lifting channel 40, two equally vertically arranged lifting chains 41 are movably connected, undertaking the primary lifting task. To drive the chains, a lifting drive sprocket 42, precisely meshing with the chain teeth, is rotatably connected to both the upper and lower ends of each lifting chain 41. Outside the lifting channel 40, a dedicated lifting drive motor 43 is fixedly installed to drive these sprockets, providing a stable and reliable power source for the entire lifting system. Between the two lifting chains 41, multiple shot lifting buckets 44, evenly distributed along the chain length, are ingeniously connected through a clever mechanical mechanism. These buckets are responsible for grabbing and carrying the shot to be lifted during the cyclic process. At the lower end of the lifting channel 40, a receiving channel 45 extends inward into the tunnel shot blasting housing 1. This receiving channel 45 is not horizontally positioned, but rather designed to extend obliquely upward away from the main body of the lifting channel 40. This angled design helps the shot flow more smoothly. Simultaneously, the shot separator 28 extends outward into a second separation discharge channel 46, its free end precisely extending into the internal space of the receiving channel 45, ensuring that the separated, qualified shot can be accurately guided to the lifting system.

[0049] At the top of the tunnel shot blasting shell 1, a shot storage shell 47 is provided for temporary storage of qualified shot, forming a buffer and transfer station in the shot circulation loop. The upper outlet of the lifting channel 40 is directly connected to the upper part of the shot storage shell 47, allowing the qualified shot to be lifted smoothly into the storage shell. At the lower end of the storage shell, two independent feeding channels 48 are connected downwards, and the lower outlet of each feeding channel 48 is precisely connected to the upper end of the corresponding conveying channel 5 inside the shot blasting machine. This connection design constructs a complete closed loop path: qualified shot lifted by the shot elevator first enters the shot storage shell 47 for temporary storage, and then, under the action of gravity or other auxiliary mechanisms, is smoothly transported back to the corresponding conveying channel 5 through these two feeding channels 48. This achieves efficient and continuous recycling of shot in the shot blasting cleaning system, significantly improving the operating efficiency and economic benefits of the equipment.

[0050] The working principle of this device is as follows:

[0051] First, the workpieces to be cleaned are suspended sequentially on the hanging rings 17 at the lower end of the suspension shaft 16 of the conveyor chain 2. After starting the equipment, the conveyor chain 2 runs continuously, driving the workpieces to enter the tunnel shot blasting housing 1 at a constant speed along the slide 3. When the workpiece passes through the sealing belt 11 section, the C-shaped grooves 18 of the two sealing belts 11 close from both sides and fit the suspension shaft 16, ensuring that the suspension shaft 16 can move smoothly with the workpiece while maintaining the sealing performance of the slide 3 to prevent dust from escaping. When the suspension shaft 16 reaches the area where the rotary drive tooth 20 is located, the transmission tooth groove 19 on the suspension shaft 16 meshes with the rotary drive tooth 20, driving the suspension shaft 16 and the workpiece to rotate continuously, so that all surfaces of the workpiece can be uniformly shot blasted.

[0052] After the workpiece enters the shot blasting area, the shot blasting impellers 9 inside the shot blasting columns 4 on both sides rotate at high speed under the drive of the shot blasting drive motor 10. Qualified shot enters each shot blasting chamber 6 through the conveying channel 5 and the guide channel 7, and is thrown out along the shot blasting channel 8 by the high-speed rotating shot blasting impellers 9, impacting the surface of the workpiece at high speed to remove the oxide layer, rust, impurities and other attachments on the surface of the workpiece, thus completing the surface cleaning operation.

[0053] After the cleaning operation is completed, the workpiece continues to move along the conveyor chain 2, pushing aside the three layers of flexible baffles at the opening end of the tunnel shot blasting shell 1 in sequence before being sent out of the equipment. After the workpiece passes through, the flexible baffles quickly reset under the action of the torsion spring 25, re-closing the opening and reducing the splashing of shot and dust. The used shot, along with the impurities and dust generated by the impact, falls to the bottom of the tunnel shot blasting shell 1. Under the collection action of the funnel-shaped guide surface, it falls into the shot separator 28 below through the shot collection port 27.

[0054] The vibration motor 33 starts and drives the shot separator 28 to reciprocate along the connecting slide rail 35. The mixture falling into the upper separation chamber 29 gradually moves under the action of vibration: the shot of qualified size falls into the lower separation chamber 30 through the first separation hole 31 on the inclined side. Large particles of impurities are blocked in the upper separation chamber 29. Under the combined action of the displacement ramp 39 and vibration, they move along the ramp towards the first separation discharge channel 37 and are finally discharged through the first separation discharge channel 37 and collected in the first separation collection tank 36. Under the action of vibration, the shot mixture entering the lower separation chamber 30 has tiny dust particles mixed in it falling through the smaller secondary separation hole 32 and being collected by the second separation collection tank 38 below. Qualified shot remains in the lower separation chamber 30 and flows into the receiving channel 45 of the shot elevator through the second separation discharge channel 46.

[0055] Qualified shot entering the receiving channel 45 falls to the bottom of the lifting channel 40 and is grabbed by the shot lifting bucket 44 on the cyclically moving lifting chain 41. As the lifting chain 41 conveys it upward, it is finally sent from the upper outlet of the lifting channel 40 into the shot storage shell 47 for temporary storage. The temporarily stored qualified shot is then sent back into the conveying channel 5 in the shot blasting column 4 through the two feeding channels 48 to enter the next round of shot blasting operation, thereby realizing the self-separation and cleaning of shot and continuous recycling.

[0056] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0057] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A circulating self-separating cleaning suspended shot blasting machine, comprising a tunnel shot blasting shell (1) with openings at both ends, and a conveyor chain (2) arranged along its length above the tunnel shot blasting shell (1), characterized in that, The upper end of the tunnel shot blasting shell (1) is provided with a passage slide (3) arranged along its length direction. The front and rear sides of the tunnel shot blasting shell (1) are provided with vertically arranged shot blasting columns (4). Each shot blasting column (4) is provided with a vertically arranged conveying channel (5). The shot blasting column (4) is provided with multiple shot blasting chambers (6). Each conveying channel (5) is provided with multiple guide channels (7) that are connected to the shot blasting chambers (6) on its edge one by one. Each shot blasting chamber (6) is connected to multiple shot blasting channels (8) in the middle of the tunnel shot blasting shell (1). Each shot blasting chamber (6) is rotatably connected with a shot blasting impeller (9). Each shot blasting column (4) is equipped with multiple shot blasting drive motors (10) for driving the shot blasting impellers (9) to rotate one by one. The bottom of the tunnel shot blasting shell (1) is provided with a shot collection port (27), and a shot separator (28) is movably arranged below the shot collection port (27). The unit separator is provided with an upper separation chamber (29) located on the upper layer and a lower separation chamber (30) located on the lower layer. The upper end of the upper separation chamber (29) is open to catch the shot falling from the shot collection port (27). The bottom of the upper separation chamber (29) is provided with a number of primary separation holes (31), and the bottom of the lower separation chamber (30) is provided with a number of secondary separation holes (32). The diameter of the secondary separation holes (32) is smaller than the diameter of the primary separation holes (31). A vibration motor (33) is installed at one end of the shot collection port (27). A shot lifter is vertically arranged on the outside of the tunnel shot blasting shell (1). The lower end of the shot lifter is connected to the middle of the lower separation chamber (30). A shot storage shell (47) is arranged at the upper end of the tunnel shot blasting shell (1). Two feeding channels (48) are connected downward at the lower end of the shot storage shell (47). The lower end of each feeding channel (48) is connected to the upper end of the corresponding conveying channel (5).

2. The suspended shot blasting machine with circulating self-separation cleaning according to claim 1, characterized in that, Both sides of the shot separator (28) are provided with connecting slide bars (34) arranged along its length direction, and the bottom of the tunnel shot blasting shell (1) is provided with two connecting slide rails (35) that are slidably connected to the connecting slide bars (34) respectively.

3. The suspended shot blasting machine with circulating self-separation cleaning according to claim 1, characterized in that, Below the tunnel shot blasting shell (1), at one end of the shot separator (28), there is a first separation collection trough (36) with an upper opening. One end of the shot separator (28) is connected to a first separation discharge channel (37) that communicates with the upper separation chamber (29). The first separation discharge channel (37) is located above the first separation collection trough (36). Below the shot separator (28), there is a second separation collection trough (38) with an upper opening.

4. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 3, characterized in that, The bottom of the upper separation chamber (29) protrudes upward to form several displacement ramps (39) distributed along its length and approximately V-shaped. The upward protruding end of each displacement ramp (39) faces the first separation collection groove (36), and the end of each displacement ramp (39) away from its tip is vertically downward. The primary separation hole (31) is opened on the inclined side of the displacement ramp (39).

5. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 1, characterized in that, The shot blasting device includes a vertically arranged lifting channel (40), in which two vertically arranged lifting chains (41) are movably connected. At both ends of each lifting chain (41) in the lifting channel (40) are rotatably connected to a lifting drive sprocket (42) that meshes with it. A lifting drive motor (43) for driving the lifting drive sprocket (42) to rotate is installed outside the lifting channel (40). The two lifting chains (41) are connected to a plurality of shot blasting buckets (44) distributed along their length. The lower end of the lifting channel (40) is provided with a receiving channel (45) that extends into the tunnel shot blasting shell (1). The receiving channel (45) is obliquely upward in a direction away from the lifting channel (40). The shot separator (28) is provided with a second separation discharge channel (46) that extends into the free end of the receiving channel (45). The upper end of the lifting channel (40) is connected to the upper end of the shot storage shell (47).

6. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 1, characterized in that, The upper end of the tunnel shot blasting shell (1) is movably connected to both sides of the slide (3). The tunnel shot blasting shell (1) is rotatably connected to both ends of each sealing belt (11) with a corresponding drive wheel (12). The tunnel shot blasting shell (1) is equipped with a sealing drive motor (13) at each sealing belt (11). The power output shaft of each sealing drive motor (13) is connected to one of the drive wheels (12). The conveyor chain (2) is connected to a plurality of connecting blocks (15) distributed along its length. Each connecting block (15) is provided with a hanging shaft (16) downward. Each hanging shaft (16) is provided with a hanging ring (17) at its lower end. Each sealing belt (11) is provided with a plurality of C-shaped slots (18) corresponding to the hanging shaft (16) on its outer side. The tunnel shot blasting shell (1) has multiple layers of blocking layers at the openings on both the front and rear sides. Each blocking layer includes multiple flexible baffles that are symmetrically connected to the inner wall of the tunnel shot blasting shell (1). The free edges of the two opposing flexible baffles are staggered.

7. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 6, characterized in that, Each sealing belt (11) has several movable slits (14) distributed along its length on its outer side.

8. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 6, characterized in that, Each suspension shaft (16) is rotatably connected to the lower end of the corresponding connecting block (15). Each suspension shaft (16) has multiple circumferentially distributed transmission tooth grooves (19) on its outer periphery. On one side of the slide (3), multiple rotating drive teeth (20) distributed along its length direction are provided at the shot blasting column (4).

9. A suspended shot blasting machine with circulating self-separation cleaning as described in claim 6, characterized in that, The inner wall of the tunnel shot blasting shell (1) is vertically provided with a connecting shaft (21) at each barrier layer. Each flexible baffle includes a connecting piece (22) connected to the corresponding connecting shaft (21) and multiple flexible baffles (23) connected to the free edge of the connecting piece (22). Each connecting piece (22) is provided with a rotating collar (24) rotatably connected to the corresponding connecting shaft (21). Each connecting shaft (21) is fitted with multiple torsion springs (25) corresponding one-to-one with the rotating collars (24). Both ends of (25) are connected to the corresponding connecting shaft (21) and the corresponding rotating collar (24). The elastic force of the torsion spring (25) causes the flexible baffle to have a tendency to rotate outward from the opening of the tunnel shot blasting shell (1). The inner wall of the tunnel shot blasting shell (1) is provided with a vertical limiting strip (26) at each connecting shaft (21). The vertical limiting strip (26) is used to block the flexible baffle from rotating outward, so that it can rotate outward to the maximum extent to be perpendicular to the inner wall of the tunnel shot blasting shell (1).

10. A suspended shot blasting machine with circulating self-separation cleaning according to claim 1, characterized in that, The bottom of the tunnel shot blasting shell (1) converges downward toward the shot collection port (27).

Images