Sand raw material screening device for hull sand blasting

Abstract

The utility model discloses a sand raw material screening device for ship body sand blasting, which comprises a barrel body, a quick-assembly device is arranged on the outer side of the barrel body, the quick-assembly device comprises a quick-assembly sleeve, a control sleeve, a variable-diameter groove, a variable-diameter plate, a quick-assembly block, a quick-assembly groove, a quick-assembly rod, a push spring and a push plate, the variable-diameter groove is arranged on the inner side of the control sleeve, the quick-assembly block is connected to one side of the variable-diameter plate, and the quick-assembly rod is connected to the other side of the variable-diameter plate. The fast-assembly sleeve is arranged in the fast-assembly rod, the fast-assembly groove is formed in the outer side of the fast-assembly rod, the push plate is connected with the fast-assembly sleeve through the push spring, a positioning mechanism is arranged on the outer side of the fast-assembly sleeve and comprises a positioning sleeve, a connecting plate, a clamping plate, a return sleeve, a return groove, a guide groove, a connecting block, a guide rod and a return block, the positioning sleeve is arranged on the outer side of the fast-assembly sleeve in a sleeving mode, and the clamping plate is connected with the positioning sleeve through the connecting plate. The guide rod is connected to one side of the return stroke block, and the screening device is arranged on the inner side of the barrel. The rotary drum has the advantages that the operation noise of equipment is reduced, the service life of the equipment is prolonged, and the structural stability is guaranteed while rapid maintenance and replacement are realized.

Description

Technical Field

[0001] This utility model relates to the field of sand raw material processing technology for ship hull sandblasting, and more specifically, it relates to a sand raw material screening device for ship hull sandblasting. Background Technology

[0002] In existing technologies, the sand screening devices for ship hull sandblasting have the following problems:

[0003] First, current sand screening devices mainly rely on the principle of vibrating screening. This method of operation not only generates huge noise pollution, which has an adverse impact on the working environment of operators, but also causes high-frequency continuous vibration to accelerate the wear of equipment parts, shorten the service life of key components, increase maintenance costs and replacement frequency. In addition, severe vibration may also affect the normal operation of surrounding equipment, reduce overall work efficiency, and may even cause potential damage to the foundation structure of the working area.

[0004] Secondly, although some existing equipment uses drum screening, the disassembly and assembly design of the drum body has obvious defects. When routine maintenance, cleaning blockages, or replacement of damaged screens are required, complex disassembly steps and professional tools are often needed. This not only increases the workload of maintenance personnel but also greatly prolongs equipment downtime. The complex disassembly and assembly process can also easily cause damage or loss of parts, increasing additional maintenance costs. In emergency situations where quick handling is required, the cumbersome disassembly and assembly procedures can delay the best maintenance time and affect production progress.

[0005] Furthermore, although some equipment is designed with quick disassembly and assembly mechanisms to improve the maintenance efficiency of the drum body, the structure of these devices is too simple and crude, and the reliability is poor. During the operation of the equipment, due to the continuous vibration generated by the screening operation and the repeated impact of a large amount of sand raw material on the drum wall, the fixing structure is prone to loosening or even falling off completely. Once the fixing structure fails, it will not only cause the drum to run unstably and cause abnormal wear, but may also cause equipment shutdown or safety accidents. This unstable fixing method not only affects the normal operation of the equipment and the screening effect, but also increases the safety hazards of the equipment, which may cause personal injury and property damage. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the problems existing in the prior art, this utility model provides a sand raw material screening device for ship hull sandblasting, so as to solve the technical problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a sand raw material screening device for ship hull sandblasting, comprising a cylinder, characterized in that: a quick-assembly device is provided on the outer side of the cylinder, the quick-assembly device comprising a quick-assembly sleeve, a control sleeve, a diameter-changing groove, a diameter-changing plate, a quick-assembly block, a quick-assembly groove, a quick-assembly rod, a push spring, and a push plate; the quick-assembly sleeve is detachably fitted onto the outer side of the quick-assembly rod; the control sleeve is rotatably fitted onto the outer side of the quick-assembly sleeve; the diameter-changing groove is opened on the inner side of the control sleeve; the diameter-changing plate is slidably disposed in the diameter-changing groove; the quick-assembly block is fixedly connected to one side of the diameter-changing plate; the quick-assembly groove is opened on the outer side of the quick-assembly rod; and the push plate is connected to the cylinder by a push spring and a push plate. The inner wall of the sleeve is connected, and a positioning mechanism is provided on the outer side of the quick-assembly sleeve. The positioning mechanism includes a positioning sleeve, a connecting plate, a clamping plate, a return sleeve, a return groove, a guide groove, a connecting block, a guide rod, and a return block. The positioning sleeve is fitted on the outer side of the quick-assembly sleeve. The clamping plate is fixedly connected to the positioning sleeve through the connecting plate. The return sleeve is rotatably fitted on the outer side of the quick-assembly sleeve. The return groove is opened on the return sleeve. The guide groove is opened inside the connecting block. The connecting block is fixedly connected to the outer side of the quick-assembly sleeve. The guide rod is fixedly connected to one side of the return block. The return block is fixedly connected to one side of the return sleeve. A screening device is provided on the inner side of the cylinder.

[0010] The present invention is further configured such that a guide block is fixedly provided on the inner side of the positioning sleeve, and a guide groove is provided on the outer side of the quick-release sleeve, and the guide block is slidably disposed in the guide groove.

[0011] The present invention is further configured such that a plurality of positioning rods are slidably provided on the side wall of the control sleeve, a conical spring is connected to the outer wall of the control sleeve, one end of the positioning rod is connected to the outer end of the positioning rod through the conical spring, a plurality of positioning grooves are opened on the outer side of the quick-release sleeve, and the other end of the positioning rod is inserted into the positioning groove.

[0012] The present invention is further configured such that a spring is connected to one side of the positioning sleeve, the other end of the spring is in contact with the return sleeve, and a return spring is movably sleeved on the outside of the guide rod.

[0013] The present invention is further configured such that the screening device includes a mounting frame, a screen, a side cover, a fixing plate, a feed inlet, an external gear, a spur gear, a fixing shaft, an internal gear, and a discharge port. The mounting frame is detachably mounted on the outside of the side cover, the side cover is detachably mounted on both sides of the side cover, and the side cover is rotatably connected to the cylinder. The fixing plate is detachably mounted on the outside of the mounting frame. The feed inlet is located on one side of the side cover. The external gears are detachably sleeved on the outside of the two screens respectively. The spur gear is rotatably sleeved on the outside of the fixing shaft. The fixing shaft is fixedly mounted on one side of one side cover. The internal gears are detachably connected to the cylinder and the inside of one of the screens respectively. The discharge port is located on the other side cover. The screening device avoids the noise pollution and severe vibration generated by traditional vibrating screening.

[0014] The present invention is further configured such that one of the side covers is provided with a discharge port on one side, and multiple discharge ports are provided, the design of which facilitates graded material feeding.

[0015] The present invention is further configured such that a support frame is detachably provided on one side of the mounting frame, and a motor is detachably provided on one side of the support frame. A transmission wheel is detachably connected to one end of a screen and the output end of the motor. A transmission belt is sleeved on the outside of the transmission wheel. The transmission wheel at one end of the screen is rotatably connected to one side cover. The above components provide stable power support.

[0016] The present invention is further configured such that a pulley is rotatably provided on one side of the side cover, and the pulley is respectively arranged on the inner and outer sides of the screen and the inner side of the cylinder. The pulley is mainly used for support.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a sand raw material screening device for ship hull sandblasting, which has the following beneficial effects:

[0019] 1. The screening device uses a multi-layer screen structure, which, together with the motor driving the transmission wheel and transmission belt 40, achieves power transmission. The meshing transmission of external gears, spur gears and internal gears makes the screen rotate synchronously, avoiding the noise pollution and severe vibration generated by traditional vibrating screening, effectively reducing equipment wear and extending service life. At the same time, the pulley setting provides stable support for the screen and cylinder, ensuring screening effect. The arrangement of the feed inlet, discharge outlet and discharge outlet realizes the graded collection of sand raw materials and improves screening efficiency.

[0020] 2. The quick-installation device adopts a cooperative structure of quick-installation sleeve and quick-installation rod. By controlling the sleeve to drive the diameter-changing groove to rotate, the diameter-changing plate drives the quick-installation block to disengage from the quick-installation groove. Combined with the design of push spring and push plate, it realizes the quick disassembly and assembly of the fixed plate, thereby realizing the quick disassembly and assembly between the cylinder and the side cover, and thus realizing the quick disassembly, assembly, maintenance and replacement of the screen. This structure avoids the problems of cumbersome and time-consuming disassembly and assembly of traditional equipment. Maintenance operations can be completed without professional tools, which greatly improves the efficiency of equipment maintenance and replacement.

[0021] 3. The positioning mechanism achieves stable positioning of the quick-assembly device through the cooperation of multiple components such as the positioning sleeve, return sleeve, connecting block and guide rod. The multi-limit design achieved by the cooperation of components such as the guide block and guide groove, and the positioning rod and positioning groove, combined with the elastic support of spring and return spring, effectively prevents loosening and falling off during equipment operation. This mechanism solves the problem of instability of traditional quick disassembly and assembly structures, ensures safe operation of equipment, and reduces safety hazards. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the sand raw material screening device for hull sandblasting in this utility model.

[0023] Figure 2 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0024] Figure 3 This is a schematic diagram of the overall structure from a second perspective in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of this utility model with one side cover removed;

[0026] Figure 5 This is a cross-sectional structural diagram of the quick-assembly device and positioning mechanism in this utility model;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0028] In the diagram: 1. Cylinder body; 2. Quick-release sleeve; 3. Control sleeve; 4. Variable diameter groove; 5. Variable diameter plate; 6. Quick-release block; 7. Quick-release groove; 8. Quick-release rod; 9. Push spring; 10. Push plate; 11. Positioning sleeve; 12. Connecting plate; 13. Clamping plate; 14. Return sleeve; 15. Return groove; 16. Guide groove; 17. Connecting block; 18. Guide rod; 19. Return block; 20. Guide block; 21. Guide groove; 22. 23. Positioning rod; 24. Conical spring; 25. Positioning groove; 26. Spring; 27. Return spring; 28. Mounting frame; 29. ​​Side cover; 20. Fixing plate; 31. Feed inlet; 32. External gear; 33. Spur gear; 34. Fixed shaft; 35. Internal gear; 36. Discharge port; 37. Support frame; 38. Motor; 39. Transmission wheel; 40. Transmission belt; 41. Pulley; 50. Screen. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0032] Please see Figures 1-6 The sand raw material screening device for ship hull sandblasting includes a cylinder 1. A quick-assembly device is provided on the outside of the cylinder 1. The quick-assembly device includes a quick-assembly sleeve 2, a control sleeve 3, a diameter changing groove 4, a diameter changing plate 5, a quick-assembly block 6, a quick-assembly groove 7, a quick-assembly rod 8, a push spring 9, and a push plate 10. The quick-assembly sleeve 2 is detachably fitted on the outside of the quick-assembly rod 8. The control sleeve 3 is rotatably fitted on the outside of the quick-assembly sleeve 2. The diameter changing groove 4 is opened on the inside of the control sleeve 3. The diameter changing plate 5 is slidably disposed in the diameter changing groove 4. The quick-assembly block 6 is fixedly connected to one side of the diameter changing plate 5. The quick-assembly groove 7 is opened on the outside of the quick-assembly rod 8. The push plate 10 is connected to the inner wall of the quick-assembly sleeve 2 through the push spring 9. A positioning mechanism is provided on the outside of the quick-assembly sleeve 2. The positioning mechanism includes a positioning sleeve 11, a connecting plate 12, a clamping plate 13, a return sleeve 14, a return groove 15, a guide groove 16, a connecting block 17, a guide rod 18, and a return block 19. The positioning sleeve 11 is fitted on the outside of the quick-release sleeve 2. The clamping plate 13 is fixedly connected to the positioning sleeve 11 through the connecting plate 12. The return sleeve 14 is rotatably fitted on the outside of the quick-release sleeve 2. The return groove 15 is opened on the return sleeve 14. The guide groove 16 is opened inside the connecting block 17. The connecting block 17 is fixedly connected to the outside of the quick-release sleeve 2. The guide rod 18 is fixedly connected to one side of the return block 19. The return block 19 is fixedly connected to one side of the return sleeve 14. A screening device is provided inside the cylinder 1.

[0033] A guide block 20 is fixedly provided on the inner side of the positioning sleeve 11, and a guide groove 21 is provided on the outer side of the quick-release sleeve 2. The guide block 20 is slidably disposed in the guide groove 21.

[0034] Multiple positioning rods 22 are slidably provided on the side wall of the control sleeve 3. A conical spring 23 is connected to the outer wall of the control sleeve 3. One end of the positioning rod 22 is connected to the outer end of the positioning rod 22 through the conical spring 23. Multiple positioning grooves 24 are opened on the outer side of the quick-release sleeve 2, and the other end of the positioning rod 22 is inserted into the positioning groove 24.

[0035] A spring 25 is connected to one side of the positioning sleeve 11, and the other end of the spring 25 is in contact with the return sleeve 14. A return spring 26 is movably sleeved on the outside of the guide rod 18.

[0036] In this embodiment, when the screen 50 needs maintenance, cleaning, or replacement, firstly, the return sleeve 14 is rotated. The return sleeve 14 will drive the return block 19 and the return groove 15 to move. The return block 19 will drive the guide rod 18 to move along the guide groove 16 opened in the connecting block 17. The return block 19 will cooperate with the connecting block 17 to compress the return spring 26. When the return spring 26 is compressed to its limit, the return groove 15 just moves to the position corresponding to the clamping plate 13. Then, the positioning sleeve 11 is pushed. The positioning sleeve 11 will drive the guide block 20 to slide along the guide groove 21 while driving the connecting plate 12 and the clamping plate 13 to slide. Then, the positioning sleeve 11 will cooperate with the return sleeve 14 to compress the spring 25. When the spring 25 is compressed to its limit, the corresponding clamping plate 13 just passes through. The return groove 15 reaches the other side of the return sleeve 14, and then the return sleeve 14 is released. The return spring 26 will drive the return block 19 and the return sleeve 14 to rotate and reset. Then the return block 19 will drive the guide rod 18 to rotate and reset. The return sleeve 14 will drive the return groove 15 to reset and move to a position that does not correspond to the clamping plate 13. Then the connecting plate 12 and the corresponding clamping plate 13 cooperate to limit the positioning sleeve 11 to one side of the return sleeve 14. At this time, the positioning sleeve 11 no longer limits the positioning rod 22. Then the control sleeve 3 is rotated, and the control sleeve 3 will drive the multiple positioning rods 22 that are slidably set on the side wall to move. Then the side wall of the positioning groove 24 will press against one end of the positioning rod 22. Due to the rounded corner structure design at the end of the positioning rod 22 and the rounded corner design at the edge of the positioning groove 24, the positioning is completed. One end of rod 22 slides out of positioning groove 24, and then the other end of positioning rod 22 will drive tapered spring 23 to stretch. At the same time, control sleeve 3 will drive the inner diameter-changing groove 4 to rotate. Due to the special structural design of diameter-changing groove 4 and diameter-changing plate 5, when diameter-changing groove 4 rotates, diameter-changing plate 5 moves along diameter-changing groove 4 and drives quick-release block 6 to slide out of quick-release groove 7. Then push spring 9 pushes push plate 10 to reset, so that push plate 10 pushes one end of quick-release rod 8. Then the reaction force of push spring 9 reset causes quick-release sleeve 2 to disengage from the outside of quick-release rod 8. Then quick-release sleeve 2 is removed, and then the corresponding quick-release devices are removed one by one. Then side cover 28 and mounting frame 27 are removed, and then the connection between screen 50 and corresponding gear is disconnected. Screen 50 is taken out and then screen 50 is processed. Maintenance, cleaning, and replacement are all that's needed. After maintenance, cleaning, and replacement, reinstall the screen 50 inside the cylinder 1, then re-establish the connection between the screen 50 and the corresponding gear. Next, place the mounting frame 27 and side cover 28 in their original positions, and then install the fixing plate 29 in its original position, ensuring that the quick-release rod 8, which is fixedly connected to the outside of the mounting frame 27, passes through the hole on the fixing plate 29. Then, re-fit the quick-release sleeve 2 onto the outside of the quick-release rod 8. One end of the quick-release rod 8 will then abut against the push plate 10, causing the push plate 10 to press against the push spring 9. When the push spring 9 is pressed to its limit, rotate the control sleeve 3 in the opposite direction. The control sleeve 3 will then drive the diameter-changing groove 4 to reset. The rotation of the diameter-changing groove 4 will then cause the diameter-changing plate 5 to reset. Finally, the diameter-changing plate 5 will drive the quick-release block 6 to re-engage into the quick-release groove 7.At this point, the conical spring 23 will drive the positioning rod 22 to reset, so that the other end of the positioning rod 22 is inserted into the original positioning groove 24. Then, the return sleeve 14 will rotate again, causing the return sleeve 14 to move the return block 19 and the return groove 15. Then, the return block 19 will move the guide rod 18 and cooperate with the connecting block 17 to press the return spring 26. When the return groove 15 moves to the position corresponding to the clamping plate 13, the spring 25 pushes the positioning sleeve 11 to drive the guide block 20 to slide and reset along the guide groove 21. Then, the positioning sleeve 11 will drive the connecting plate 12 and the clamping plate 13 to reset. After the spring 25 has reset, the other two clamping plates 13 will move to both sides of the return sleeve 14, and then the return sleeve 14 will be released. The return spring 26 pushes the return block 19 and return sleeve 14 to reset, causing the return block 19 to drive the guide rod 18 to reset. The return sleeve 14 drives the return groove 15 to move to a position that does not correspond to the clamping plate 13. At this time, through the cooperation of the connecting plate 12 and the corresponding two clamping plates 13, and the cooperation of the guide block 20 and the guide groove 21, the positioning sleeve 11 is stably limited to one side of the return sleeve 14, so that the positioning sleeve 11 will not move. Then, the inner wall of the positioning sleeve 11 will limit the outer end of the positioning rod 22 again to prevent the positioning rod 22 from moving. Then, the positioning rod 22 will cooperate with the positioning groove 24 to stably limit the control sleeve 3, thereby preventing the control sleeve 3 from rotating unexpectedly, avoiding accidental unlocking, and thus ensuring the stability of the fixed structure.

[0037] Please see Figures 1-5 As one embodiment of the screening device: the screening device includes a mounting frame 27, a screen 50, a side cover 28, a fixing plate 29, a feed inlet 30, an external gear 31, a spur gear 32, a fixing shaft 33, an internal gear 34, and a discharge port 35. The mounting frame 27 is detachably mounted on the outside of the side cover 28, and the side cover 28 is detachably mounted on both sides of the side cover 28. The side cover 28 is rotatably connected to the cylinder 1. The fixing plate 29 is detachably mounted on the outside of the mounting frame 27. The feed inlet 30 is located on one side of the side cover 28. The external gear 31 is detachably sleeved on the outside of the two screens 50 respectively. The spur gear 32 is rotatably sleeved on the outside of the fixing shaft 33. The fixing shaft 33 is fixedly mounted on one side of one side cover 28. The internal gear 34 is detachably connected to the inside of the cylinder 1 and one of the screens 50 respectively. The discharge port 35 is located on one side of the other side cover 28.

[0038] One of the covers 28 has a discharge port 36 connected to one side, and multiple discharge ports 36 are provided.

[0039] A support frame 37 is detachably provided on one side of the mounting frame 27, and a motor 38 is detachably provided on one side of the support frame 37. A transmission wheel 39 is detachably connected to one end of a screen 50 and the output end of the motor 38. A transmission belt 40 is sleeved on the outside of the transmission wheel 39. The transmission wheel 39 at one end of the screen 50 is rotatably connected to one side cover 28.

[0040] A pulley 41 is provided on one side of the side cover 28 for rotation. The pulley 41 is respectively located on the inner and outer sides of the screen 50 and the inner side of the cylinder 1.

[0041] More specifically, when the equipment is needed, the raw sand material is first fed into the innermost screen 50 through the feed inlet 30. Then, the motor 38 is turned on, and the motor 38 drives the transmission belt 40 through the transmission wheel 39 connected to the output end. The transmission belt 40 then drives another transmission wheel 39 and the innermost screen 50 to rotate, so that the innermost screen 50 performs the first screening of the raw sand material. At the same time, the innermost screen 50 drives the external gear 31 connected to the outside to rotate. Then, the external gear 31 drives the spur gear 32 set inside the other screen 50 to rotate along the fixed shaft 33. Then, the multiple spur gears 32 drive the internal gear 3 that meshes with them. 4. The internal gear 34 will rotate, and then the external screen 50 connected to it will rotate, so that the external screen 50 will perform secondary screening. Then, the external screen 50 will drive the external gear 31 connected to its outside to drive the spur gear 32 set on the outside of the external screen 50 to rotate along the fixed shaft 33. Then, the multiple spur gears 32 will drive the internal gear 34 connected to the inside of the cylinder 1 to rotate, thereby driving the cylinder 1 to rotate between the two mounting frames 27. The pulley 41 provides support for the screen 50 and the cylinder 1. Then, the screened sand raw material will be output to the external collection device for further processing through the feed port 35 and the two discharge ports 36 respectively.

[0042] In summary, during the use or operation of the overall equipment: when maintenance, cleaning, or replacement of the screen 50 is required, first rotate the return sleeve 14. The return sleeve 14 will drive the return block 19 and the return groove 15 to move. The return block 19 will drive the guide rod 18 to move along the guide groove 16 opened in the connecting block 17. The return block 19 will cooperate with the connecting block 17 to compress the return spring 26. When the return spring 26 is compressed to its limit, the return groove 15 will just move to the position corresponding to the clamping plate 13. Then push the positioning sleeve 11. The positioning sleeve 11 will drive the guide block 20 to slide along the guide groove 21 while driving the connecting plate 12 and the clamping plate 13 to slide. Then the positioning sleeve 11 will cooperate with the return sleeve 14 to compress the spring 25. When the spring 25 is compressed to its limit, the corresponding clamping plate 13 passes through the return groove 15 to reach the other side of the return sleeve 14. Then, the return sleeve 14 is released, and the return spring 26 will drive the return block 19 and the return sleeve 14 to rotate and reset. Then, the return block 19 will drive the guide rod 18 to rotate and reset. The return sleeve 14 will drive the return groove 15 to reset and move to a position that does not correspond to the clamping plate 13. Then, the connecting plate 12 and the corresponding clamping plate 13 cooperate to limit the positioning sleeve 11 to one side of the return sleeve 14. At this time, the positioning sleeve 11 no longer limits the positioning rod 22. Then, the control sleeve 3 is rotated, and the control sleeve 3 will drive the multiple positioning rods 22 that are slidably set on the side wall to move. Then, the side wall of the positioning groove 24 presses against one end of the positioning rod 22. Due to the rounded corner structure design at the end of the positioning rod 22 and the rounded corner design at the edge of the positioning groove 24, Then, one end of the positioning rod 22 slides out of the positioning groove 24, and the other end of the positioning rod 22 will drive the conical spring 23 to stretch. At the same time, the control sleeve 3 will drive the inner diameter-changing groove 4 to rotate. Due to the special structural design of the diameter-changing groove 4 and the diameter-changing plate 5, when the diameter-changing groove 4 rotates, the diameter-changing plate 5 moves along the diameter-changing groove 4 and drives the quick-release block 6 to slide out of the quick-release groove 7. Then, the push spring 9 pushes the push plate 10 to reset, so that the push plate 10 pushes one end of the quick-release rod 8. Then, the reaction force of the push spring 9 reset causes the quick-release sleeve 2 to disengage from the outside of the quick-release rod 8. Then, the quick-release sleeve 2 is removed, and then the corresponding quick-release devices are removed one by one. Then, the side cover 28 and the mounting frame 27 are removed, and then the connection between the screen 50 and the corresponding gear is disconnected. The screen 50 is taken out, and then the screen 50 is... Maintenance, cleaning, and replacement are all that's needed. After maintenance, cleaning, and replacement, reinstall the screen 50 inside the cylinder 1, then re-establish the connection between the screen 50 and the corresponding gear. Next, place the mounting frame 27 and side cover 28 in their original positions, and then install the fixing plate 29 in its original position, ensuring that the quick-release rod 8, fixedly connected to the outside of the mounting frame 27, passes through the hole on the fixing plate 29. Then, re-fit the quick-release sleeve 2 onto the outside of the quick-release rod 8. One end of the quick-release rod 8 will then abut against the push plate 10, causing the push plate 10 to press against the push spring 9. When the push spring 9 is pressed to its limit, rotate the control sleeve 3 in the opposite direction. The control sleeve 3 will then drive the diameter-changing groove 4 to reset. The rotation of the diameter-changing groove 4 will then cause the diameter-changing plate 5 to reset. Finally, the diameter-changing plate 5 will drive the quick-release block 6 to re-engage into the quick-release groove 7.At this point, the conical spring 23 will drive the positioning rod 22 to reset, so that the other end of the positioning rod 22 is inserted into the original positioning groove 24. Then, the return sleeve 14 will rotate again, causing the return sleeve 14 to move the return block 19 and the return groove 15. Then, the return block 19 will move the guide rod 18 and cooperate with the connecting block 17 to press the return spring 26. When the return groove 15 moves to the position corresponding to the clamping plate 13, the spring 25 pushes the positioning sleeve 11 to drive the guide block 20 to slide and reset along the guide groove 21. Then, the positioning sleeve 11 will drive the connecting plate 12 and the clamping plate 13 to reset. After the spring 25 has reset, the other two clamping plates 13 will move to both sides of the return sleeve 14, and then the return sleeve 14 will be released. The return spring 26 pushes the return block 19 and return sleeve 14 to reset, causing the return block 19 to drive the guide rod 18 to reset. The return sleeve 14 drives the return groove 15 to move to a position that does not correspond to the clamping plate 13. At this time, through the cooperation of the connecting plate 12 and the corresponding two clamping plates 13, and the cooperation of the guide block 20 and the guide groove 21, the positioning sleeve 11 is stably limited to one side of the return sleeve 14, so that the positioning sleeve 11 will not move. Then, the inner wall of the positioning sleeve 11 will limit the outer end of the positioning rod 22 again to prevent the positioning rod 22 from moving. Then, the positioning rod 22 will cooperate with the positioning groove 24 to stably limit the control sleeve 3, thereby preventing the control sleeve 3 from rotating unexpectedly, avoiding accidental unlocking, and thus ensuring the stability of the fixed structure.

[0043] When the equipment is needed, the raw sand material is first fed into the innermost screen 50 through the feed inlet 30. Then, the motor 38 is turned on, and the motor 38 drives the transmission belt 40 through the transmission wheel 39 connected to the output end. The transmission belt 40 then drives another transmission wheel 39 and the innermost screen 50 to rotate, so that the innermost screen 50 performs the first screening of the raw sand material. At the same time, the innermost screen 50 drives the external gear 31 connected to the outside to rotate. Then, the external gear 31 drives the spur gear 32 set inside the other screen 50 to rotate along the fixed shaft 33. Then, the multiple spur gears 32 drive the internal gear 34 meshing with them to rotate. Then, the internal gear 34 drives the connected outer screen 50 to rotate, causing the outer screen 50 to perform secondary screening. Then, the outer screen 50 drives the external gear 31 connected to its outer side to drive the spur gear 32 set on the outer side of the outer screen 50 to rotate along the fixed shaft 33. Then, the multiple spur gears 32 drive the internal gear 34 connected to the inner side of the cylinder 1 to rotate, thereby driving the cylinder 1 to rotate between the two mounting frames 27. The pulley 41 provides support for the screen 50 and the cylinder 1. Then, the screened sand raw material will be output to the external collection device for further processing through the discharge port 35 and the two discharge ports 36 respectively.

[0044] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sand raw material screening device for hull sandblasting, comprising a cylinder (1), characterized in that: A quick-assembly device is provided on the outside of the cylinder (1). The quick-assembly device includes a quick-assembly sleeve (2), a control sleeve (3), a diameter-changing groove (4), a diameter-changing plate (5), a quick-assembly block (6), a quick-assembly groove (7), a quick-assembly rod (8), a push spring (9), and a push plate (10). The control sleeve (3) is fitted on the outside of the quick-assembly sleeve (2). The diameter-changing groove (4) is opened on the inside of the control sleeve (3). The quick-assembly block (6) is connected to one side of the diameter-changing plate (5). The quick-assembly groove (7) is opened on the outside of the quick-assembly rod (8). The push plate (10) is connected to the quick-assembly sleeve (2) through the push spring (9). A positioning mechanism is provided on the outside of the quick-assembly sleeve (2). The positioning mechanism includes a positioning sleeve. (11), connecting plate (12), clamping plate (13), return sleeve (14), return groove (15), guide groove (16), connecting block (17), guide rod (18) and return block (19), positioning sleeve (11) is fitted on the outside of quick-release sleeve (2), clamping plate (13) is connected to positioning sleeve (11) through connecting plate (12), return sleeve (14) is fitted on the outside of quick-release sleeve (2), return groove (15) is opened on return sleeve (14), guide groove (16) is opened in connecting block (17), guide rod (18) is connected to one side of return block (19), and screening device is provided inside the cylinder (1).

2. The sand raw material screening device for hull sandblasting according to claim 1, characterized in that: The positioning sleeve (11) is fixedly provided with a guide block (20) on the inner side, and the quick-release sleeve (2) is provided with a guide groove (21) on the outer side, and the guide block (20) is slidably disposed in the guide groove (21).

3. The sand raw material screening device for hull sandblasting according to claim 1, characterized in that: Multiple positioning rods (22) are slidably provided on the side wall of the control sleeve (3). A conical spring (23) is connected to the outer wall of the control sleeve (3). One end of the positioning rod (22) is connected to the outer end of the positioning rod (22) through the conical spring (23). Multiple positioning grooves (24) are opened on the outer side of the quick-release sleeve (2), and the other end of the positioning rod (22) is inserted into the positioning groove (24).

4. The sand raw material screening device for hull sandblasting according to claim 3, characterized in that: A spring (25) is connected to one side of the positioning sleeve (11), and the other end of the spring (25) is in contact with the return sleeve (14). A return spring (26) is movably sleeved on the outside of the guide rod (18).

5. The sand raw material screening device for hull sandblasting according to any one of claims 1-4, characterized in that: The screening device includes a mounting frame (27), a screen (50), a side cover (28), a fixing plate (29), a feed inlet (30), an external gear (31), a spur gear (32), a fixed shaft (33), an internal gear (34), and a discharge port (35). The mounting frame (27) is detachably mounted on the outside of the side cover (28), and the side cover (28) is detachably mounted on both sides of the side cover (28). The side cover (28) is rotatably connected to the cylinder (1). The fixing plate (29) is detachably mounted. On the outside of the mounting frame (27), the feed port (30) is located on one side of the middle cover (28), the external gear (31) is detachably sleeved on the outside of the two screens (50), the spur gear (32) is rotatably sleeved on the outside of the fixed shaft (33), the fixed shaft (33) is fixedly installed on one side of the middle cover (28), the internal gear (34) is detachably connected to the inside of the cylinder (1) and one of the screens (50), and the discharge port (35) is located on one side of the other cover (28).

6. The sand raw material screening device for hull sandblasting according to claim 5, characterized in that: one of them The side cover (28) is connected to a discharge port (36) on one side, and multiple discharge ports (36) are provided.

7. The sand raw material screening device for hull sandblasting according to claim 6, characterized in that: The mounting frame (27) is detachably provided with a support frame (37) on one side, and a motor (38) is detachably provided on one side of the support frame (37). A transmission wheel (39) is detachably connected to one end of a screen (50) and the output end of the motor (38). A transmission belt (40) is sleeved on the outside of the transmission wheel (39). The transmission wheel (39) at one end of the screen (50) is rotatably connected to one side cover (28).

8. The sand raw material screening device for hull sandblasting according to claim 7, characterized in that: The side cover (28) is provided with a pulley (41) on one side, and the pulley (41) is respectively located on the inner and outer sides of the screen (50) and the inner side of the cylinder (1).

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