A roller pass type shot blasting machine

Abstract

The application discloses a roller passing type shot blasting machine and relates to the field of metal surface treatment equipment.The roller passing type shot blasting machine comprises a cleaning chamber, a roller system penetrating through the cleaning chamber, sealing mechanisms arranged at a workpiece inlet and a workpiece outlet, a plurality of sealing strips, a blowing block vertically arranged in the cleaning chamber, a gas source in communication with the blowing block and used for providing high-pressure airflow to the blowing block so that pellets near the workpiece are blown away. When working, the front end of the workpiece first passes through the sealing strips and then passes through the blowing block, the gas source provides high-speed airflow, the airflow blows in a direction perpendicular to the length of the workpiece, pellets and dust in the range between the blowing block and the workpiece are blown away from the workpiece, pellets in the range are effectively prevented from penetrating through the gap between the workpiece and the sealing strips, and the purpose of preventing the pellets and the dust from leaking out is achieved.

Description

[0001] A roller conveyor shot blasting machine Technical Field

[0002] This application relates to the field of metal surface treatment equipment, and more particularly to a roller conveyor shot blasting machine. Background Technology

[0003] Roller conveyor shot blasting machines are continuous, automated cleaning equipment widely used for surface cleaning, rust removal, and strengthening of steel structures, profiles, plates, and other workpieces. Their working principle involves using a high-speed rotating impeller to propel shot onto the workpiece surface. This results in the workpiece being subjected to powerful, dense impacts and friction from different coordinate directions, causing oxide scale, rust, and other contaminants to quickly detach. The workpiece then achieves a smooth surface with a certain degree of roughness. Workpieces are loaded and unloaded via roller conveyors at both the inlet and outlet sides of the cleaning chamber.

[0004] One of the core components of this type of equipment is the shot blasting chamber. During the shot blasting process, a large number of shot particles splash at high speed inside the chamber. If the chamber is not properly sealed, especially at the workpiece inlet and outlet, shot particles and dust can leak out. This not only wastes shot particles, pollutes the working environment, and increases cleaning costs, but more seriously, the splashed shot particles may pose a threat to equipment and personnel safety.

[0005] In related technologies, the inlet and outlet seals often employ simple rubber curtains or multiple suspension chains for shielding. However, these sealing methods have significant drawbacks, resulting in incomplete sealing. Gaps exist between the rubber curtains or chains and the workpiece, especially for irregularly shaped or complex workpieces, where the gaps are even larger, allowing projectiles to easily escape. Summary of the Invention

[0006] To prevent the leakage of shot and dust, this application provides a roller conveyor type shot blasting machine.

[0007] This application provides a roller conveyor type shot blasting machine, which adopts the following technical solution:

[0008] A roller conveyor shot blasting machine includes a cleaning chamber, a roller conveyor system penetrating the cleaning chamber, and a workpiece inlet and a workpiece outlet located at both ends of the cleaning chamber. A sealing mechanism is provided at both the workpiece inlet and the workpiece outlet. The sealing mechanism includes:

[0009] Multiple sealing strips are suspended on the outside of the workpiece inlet and workpiece outlet;

[0010] A blowing block is vertically installed in the cleaning chamber. The blowing block is located on one side of the workpiece, and the blowing block has an air outlet along the length of the side wall near the workpiece.

[0011] An air source, connected to the purging block, is used to provide a high-pressure airflow to the purging block so that the projectiles near the workpiece are blown away.

[0012] Optionally, the purging block has a cavity communicating with the air outlet, and a flow divider is provided in the cavity. The purging block includes a first air guide surface and a second air guide surface. The first air guide surface and the second air guide surface are respectively located on both sides of the flow divider, and the distance between the first air guide surface and the second air guide surface gradually decreases towards the end closer to the air outlet.

[0013] Optionally, the flow divider includes a flow divider block and a pressurizing block. The flow divider block is located at the end of the pressurizing block away from the air inlet. The flow divider block and the pressurizing block are inclined along the two side walls of the purge block in the width direction.

[0014] Optionally, the booster block is slidably disposed within the diverter block, and the booster block is movable in a direction close to or away from the air inlet. The purge block is provided with an adjustment component for adjusting the position of the booster block.

[0015] Optionally, the adjustment assembly includes a wedge block, a drive block, a drive shaft, an elastic element, and a drive member; the wedge block is fixedly disposed on the side wall of the pressurizing block away from the air outlet, the wedge block is inclined downward on the side wall away from the pressurizing block, the drive shaft slides through the purge block along the length direction of the purge block, the drive block is fixedly disposed at one end of the drive shaft, the drive block is provided with an inclined surface for engaging with the wedge block, the drive member is connected to the drive shaft for driving the drive shaft to move up and down, and the elastic element is used to drive the pressurizing block to move towards the end away from the air outlet.

[0016] Optionally, it also includes two suction hoods, and two blowing blocks are provided, with the two blowing blocks located on both sides of the workpiece respectively. The blowing blocks and the suction hoods are directly opposite each other, and the blowing blocks and the suction hoods on the same side of the workpiece are connected through an air pipe, and the air source is connected to the air pipe.

[0017] Optionally, the suction hood is flared, and the opening of the suction hood is larger than the width of the purge block.

[0018] Optionally, the suction hood is provided with a blocking component for blocking projectiles.

[0019] Optionally, the blocking assembly includes a bracket and a plurality of arc-shaped baffles, the plurality of arc-shaped baffles being spaced apart, and the arc-shaped baffles being arranged in multiple layers along the depth direction of the air intake hood.

[0020] Optionally, a buffer assembly is provided between the arc-shaped baffle and the bracket.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. During operation, workpieces such as I-beams and channel steel are conveyed to the cleaning chamber via a roller conveyor system. As the workpiece passes through the inlet, the front end of the workpiece first passes through the sealing strip and then through the blowing block. The air source provides a high-speed airflow, which is directed perpendicular to the length of the workpiece. At this time, the shot and dust in the area between the blowing block and the workpiece are blown away from the workpiece, thereby effectively preventing the shot from passing through the gap between the workpiece and the sealing strip, thus achieving the purpose of preventing shot and dust leakage.

[0023] 2. The high-speed airflow entering the cavity from the duct is split by the splitter block and flows from both sides of the splitter block, i.e., both sides of the width of the blower block. The pressurization block, the first guide surface, and the second guide surface form two air channels. The cross-sectional area of ​​the cavity near the splitter block is larger than the area of ​​the two air channels. The gas is further compressed and accelerated at the two air channels. Under the guidance of the first and second guide surfaces, the two high-speed airflows are blown out at the air outlet, forming two strong air channels. This increases the effective surface area of ​​the blower while ensuring the wind force, improving the ability to clean the shot near the workpiece. The two air channels gradually converge, and the two airflows converge at a certain point on the front end of the blower block, i.e., on the extension line between the blower block and the workpiece, to strengthen the airflow velocity at the convergence point and increase the shot-cleaning ability at the convergence point. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0025] Figure 2 This is a schematic diagram illustrating the structure of the mounting plate, the purge block, and the suction hood, which are the main components of this application.

[0026] Figure 3 This application's embodiments are simply schematic diagrams illustrating the structure of the air intake hood and the blocking assembly;

[0027] Figure 4 This is a schematic diagram illustrating the structure of the purging block and the diversion section, which are the main features of the embodiments of this application.

[0028] Figure 5 This is a schematic diagram illustrating the structure of the purging block, which is the main feature of this application embodiment.

[0029] Figure 6 This is a cross-sectional view of the purging block, which is the main feature of the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Cleaning chamber; 11. Workpiece inlet; 12. Workpiece outlet; 13. Sealing strip; 21. Frame; 22. Rotary roller; 3. Blowing block; 31. Air outlet; 32. First air guide surface; 33. Second air guide surface; 34. Air duct; 4. Air source; 41. Air pipe; 5. Mounting plate; 6. Suction hood; 7. Blocking assembly; 71. Arc-shaped baffle; 72. Bracket; 721. Rubber pad; 8. Diverter section; 81. Diverter block; 82. Pressure booster block; 91. Wedge block; 92. Drive block; 93. Drive shaft; 94. Elastic element; 95. Drive element; 951. Ear plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] This application discloses a roller conveyor shot blasting machine.

[0036] Reference Figure 1 A roller conveyor shot blasting machine includes a cleaning chamber 1, a roller conveyor system running through the cleaning chamber 1, and workpiece inlets 11 and workpiece outlets 12 located at both ends of the cleaning chamber 1. The roller conveyor system includes a frame 21, a plurality of rotating rollers 22 rotatably mounted on the frame 21, and a drive motor for driving the rotating rollers 22 to rotate. The drive motor is connected to the rotating rollers 22 to drive their rotation. The plurality of rotating rollers 22 are connected by chain drive. A shot blasting mechanism is provided inside the cleaning chamber 1 to throw a plurality of shot. The shot blasting mechanism is prior art and will not be described in detail here. During operation, workpieces such as I-beams or channel steel are placed on the rotating rollers 22, and the rotating rollers 22 drive the workpieces to move, where they are impacted and polished by the plurality of shot within the cleaning chamber 1.

[0037] Reference Figure 1 Sealing mechanisms are provided at both the workpiece inlet 11 and the workpiece outlet 12. The sealing mechanisms include multiple sealing strips 13, a purge block 3, and an air source 4. The multiple sealing strips 13 are suspended on the outside of the workpiece inlet 11 and the workpiece outlet 12. The multiple sealing strips 13 are distributed along the length of the rotating roller 22 to form a sealed curtain structure. The sealing strips 13 are made of rubber.

[0038] In one specific embodiment, reference is made to Figure 2 Two mounting plates 5 are vertically fixed inside the cleaning chamber 1. The two mounting plates 5 are located on both sides of the workpiece. The blowing block 3 is vertically fixed inside the mounting plate 5. The blowing block 3 has an air blowing port 31 along the length direction on the side wall near the workpiece. A cavity communicating with the air blowing port 31 is opened inside the blowing block 3. The cross-section of the inner wall of the cavity is arc-shaped to reduce the resistance of the gas in the cavity.

[0039] Optionally, the air source 4 is connected to the purge block 3 via the air pipe 41 to provide high-pressure airflow to the purge block 3 so that the projectiles near the workpiece are blown away.

[0040] Optionally, refer to Figure 2 It also includes two suction hoods 6, which are embedded in the mounting plate 5. Furthermore, the suction hoods 6 are flared, and their openings are larger than the width of the blow-out blocks 3 to absorb more airflow. Two blow-out blocks 3 are provided, located on opposite sides of the workpiece, so that the blown airflows are opposite. The blow-out blocks 3 and the suction hoods 6 are directly opposite each other, and the blow-out blocks 3 and the suction hoods 6 on the same side of the workpiece are connected by an air pipe 41. An air source 4, which can be an air pump, is connected to the air pipe 41 and is installed inside the mounting plate 5. In this embodiment, the mounting plate 5 serves to protect the suction hoods 6, the blow-out blocks 3, and the air pump, preventing deformation from projectile impact.

[0041] During operation, high-pressure gas generated by the air pump is introduced into the purge block 3 through the air pipe 41 and discharged from the air outlet 31, forming an "air curtain". If a projectile is about to pass through the air curtain and move towards the sealing strip 13, the airflow will blow away the projectile covered by the air curtain. The airflow blown out by the purge block 3 enters the suction hood 6 on the opposite side, and is then pressurized again by the air pump before being discharged from the other purge block 3, providing the air pump with a certain initial velocity and reducing the power of the air pump. Furthermore, setting two purge blocks 3 in opposite directions can further improve the cleaning effect on the projectile.

[0042] Reference Figure 2 and Figure 3 The suction hood 6 is equipped with a blocking component 7 for blocking projectiles. The blocking component 7 includes a bracket 72 and a plurality of arc-shaped baffles 71. The plurality of arc-shaped baffles 71 are arranged at intervals, and multiple arc-shaped baffles 71 are arranged at intervals along both the width and length directions of the suction hood 6, and multiple layers of arc-shaped baffles 71 are arranged along the depth direction of the suction hood 6.

[0043] Optionally, refer to Figure 3 A buffer assembly is provided between the arc-shaped baffle 71 and the support 72. The buffer assembly includes rubber pads 721. The support 72 includes several support rods, which are fixedly installed inside the suction hood 6 along the width direction. Rubber pads 721 are fixedly installed at both ends of the arc-shaped baffle 71 and are fixedly connected to the support rods. The two ends of the support rods are respectively fixedly connected to the inner wall of the suction hood 6. When a projectile impacts the arc-shaped baffle 71, the impact force is transmitted to the support rods through the rubber pads 721. The rubber pads 721 play a buffering and energy-absorbing role, preventing the arc-shaped baffle 71 from being damaged by force.

[0044] Optionally, refer to Figure 4The cavity contains a flow divider 8. The purge block 3 includes a first air guide surface 32 and a second air guide surface 33. The first air guide surface 32 and the second air guide surface 33 are located on the inner wall of the purge block 3. The first air guide surface 32 and the second air guide surface 33 are located on both sides of the flow divider 8. Both the first air guide surface 32 and the second air guide surface 33 are arc-shaped surfaces, and the distance between the first air guide surface 32 and the second air guide surface 33 gradually decreases towards the end closer to the air outlet 31. Further, the flow divider 8 includes a flow divider block 81 and a pressurizing block 82. The flow divider block 81 is located at the end of the pressurizing block 82 away from the air outlet 31. The flow divider block 81 and the pressurizing block 82 are inclined along the two side walls of the purge block 3 in the width direction.

[0045] The high-speed airflow entering the cavity from the air duct 41 is split by the diverter block 81 and flows from both sides of the diverter block 81, i.e., both sides of the width of the blower block 3. The pressurization block, the first guide surface 32, and the second guide surface 33 form two air channels 34. The cross-sectional area of ​​the cavity near the diverter block 81 is larger than the area of ​​the two air channels 34. The gas is further compressed and accelerated at the two air channels 34. Under the guidance of the first guide surface 32 and the second guide surface 33, the two high-speed airflows are blown out at the air outlet 31, forming two strong air channels 34. This increases the working surface of the blower projectile while ensuring the wind force intensity, improving the ability to clean the projectiles near the workpiece. The two air channels 34 will gradually converge and the two airflows will converge at a certain point on the front end of the blower block 3, i.e., on the extension line between the blower block 3 and the workpiece, to strengthen the airflow velocity at the convergence point and increase the ability to blow the projectiles at the convergence point.

[0046] Optionally, the booster block 82 is slidably disposed within the diverter block 81, and the booster block 82 can move in a direction close to or away from the air outlet 31.

[0047] Reference Figure 5 and Figure 6 The purge block 3 is provided with an adjustment component for adjusting the position of the booster block 82. The adjustment component includes a wedge block 91, a drive block 92, a drive shaft 93, an elastic element 94, and a drive element 95.

[0048] Specifically, the wedge block 91 is fixedly disposed on the side wall of the pressurizing block 82 away from the air outlet 31. The wedge block 91 is inclined downward on the side wall away from the pressurizing block 82. The drive shaft 93 slides through the purge block 3 along the length direction of the purge block 3. The drive block 92 is fixedly disposed at one end of the drive shaft 93. The drive block 92 is provided with an inclined surface for fitting with the wedge block 91.

[0049] Reference Figure 5 and Figure 6The elastic element 94 is used to drive the booster block 82 to move away from the air outlet 31. The elastic element 94 is a tension spring, which is set in the diverter block 81. One end of the tension spring is fixedly connected to the diverter block 81, and the other end is fixedly connected to the booster block 82.

[0050] The driving component 95 is connected to the driving shaft 93 to drive the driving shaft 93 to move up and down. The driving component 95 is a cylinder, which is vertically fixed on the side wall of the purge block 3. The top of the piston rod of the cylinder is fixedly connected to the ear plate 951. The driving shaft 93 passes through the top wall of the purge block 3 and is fixedly connected to the ear plate 951. The cylinder drives the driving shaft 93 to move up and down through the ear plate 951, which in turn drives the driving block 92 to move. When the driving block 92 moves downward, it pushes the wedge block 91 and the booster block 82 to move closer to the air outlet 31. At this time, the angle between the airflows blown out from the two air channels 34 increases, that is, the distance between the convergence point of the two airflows and the purge block 3 is shortened. When the driving block 92 moves upward, under the action of the elastic component 94, the booster block 82 moves into the purge block 3, that is, away from the air outlet 31. At this time, the angle between the two airflows blown out from the two air channels 34 decreases, and the distance between the convergence point of the airflows and the purge block 3 increases. Therefore, by controlling the position of the booster block 82, the position of the convergence point of the two airflows can be adjusted. In actual operation, the position of the convergence point of the airflow is controlled to coincide with the center of the workpiece as much as possible, based on the position of the workpiece, to ensure the airflow intensity at the workpiece and thus improve the cleaning effect of the shot near the workpiece.

[0051] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roller conveyor shot blasting machine, comprising a cleaning chamber (1), a roller conveyor system penetrating the cleaning chamber (1), and a workpiece inlet (11) and a workpiece outlet (12) located at both ends of the cleaning chamber (1), characterized in that, Both the workpiece inlet (11) and the workpiece outlet (12) are provided with sealing mechanisms, the sealing mechanisms comprising: Multiple sealing strips (13) are suspended on the outside of the workpiece inlet (11) and the workpiece outlet (12); A blow-off block (3) is vertically installed in the cleaning chamber (1). The blow-off block (3) is located on one side of the workpiece. The blow-off block (3) has an air-blowing port (31) along the length direction near the side wall of the workpiece. An air source (4) is connected to the blowing block (3) and is used to provide a high-pressure airflow to the blowing block (3) so that the projectiles near the workpiece are blown away. The purge block (3) has a cavity communicating with the air outlet (31). A diversion section (8) is provided in the cavity. The purge block (3) includes a first air guide surface (32) and a second air guide surface (33). The first air guide surface (32) and the second air guide surface (33) are located on both sides of the diversion section (8), and the distance between the first air guide surface (32) and the second air guide surface (33) gradually decreases towards the end closer to the air outlet (31). The diversion section (8) includes a diversion block (81) and a booster block (82). The diversion block (81) is located at the end of the booster block (82) away from the air outlet (31). The diversion block (81) and the booster block (82) are inclined along the two side walls of the purge block (3) in the width direction. The booster block (82) is slidably inserted inside the diverter block (81). The booster block (82) can move in a direction close to or away from the air outlet (31). The purge block (3) is provided with an adjustment component for adjusting the position of the booster block (82).

2. The roller conveyor shot blasting machine according to claim 1, characterized in that, The adjustment assembly includes a wedge block (91), a drive block (92), a drive shaft (93), an elastic element (94), and a drive element (95). The wedge block (91) is fixedly disposed on the side wall of the pressurizing block (82) away from the air outlet (31). The wedge block (91) is inclined downward on the side wall away from the pressurizing block (82). The drive shaft (93) slides through the purge block (3) along the length direction of the purge block (3). The drive block (92) is fixedly disposed at one end of the drive shaft (93). The drive block (92) is provided with an inclined surface for fitting with the wedge block (91). The drive element (95) is connected to the drive shaft (93) for driving the drive shaft (93) to move up and down. The elastic element (94) is used to drive the pressurizing block (82) to move towards the end away from the air outlet (31).

3. A roller conveyor shot blasting machine according to claim 1 or 2, characterized in that, It also includes two suction hoods (6), two blowing blocks (3) are provided, and the two blowing blocks (3) are located on both sides of the workpiece respectively. The blowing blocks (3) and the suction hoods (6) are directly opposite each other. The blowing blocks (3) and the suction hoods (6) on the same side of the workpiece are connected through air pipes (41). The air source (4) is connected to the air pipes (41).

4. A roller conveyor shot blasting machine according to claim 3, characterized in that, The suction hood (6) is flared, and the opening of the suction hood (6) is larger than the width of the blow block (3).

5. A roller conveyor type shot blasting machine according to claim 4, characterized in that, The suction hood (6) is provided with a blocking component (7) for blocking projectiles.

6. A roller conveyor type shot blasting machine according to claim 5, characterized in that, The blocking assembly (7) includes a bracket (72) and a plurality of arc-shaped baffles (71), the plurality of arc-shaped baffles (71) are spaced apart, and the arc-shaped baffles (71) are arranged in multiple layers along the depth direction of the air intake hood (6).

7. A roller conveyor type shot blasting machine according to claim 6, characterized in that, A buffer assembly is provided between the arc-shaped baffle (71) and the bracket (72).

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