Automatic cleaning device for pallet type sand of storage and transportation line

Abstract

The present application belongs to the field of casting equipment, and proposes a vertical warehouse conveying line tray type sand automatic cleaning equipment, which comprises a rack, a conveying chain, a guard plate, a tray, a turnover brake device, a support box, a moving cleaning device and a vibration sand removing device. The turnover brake device comprises an automatic grab disc mechanism and a brake mechanism. The automatic grab disc mechanism comprises a clamping jaw, a rotating shaft and a clockwork spring. The brake mechanism comprises a ratchet sleeve, a pawl plate and a brake cylinder. The moving cleaning device comprises a front bucket, a rear bucket, a gas blowing mechanism, a reciprocating drive cylinder and a connecting rod mechanism. The connecting rod mechanism is connected with the front bucket and is used to control the opening and closing distance of the front bucket and the rear bucket. The front bucket and the rear bucket are used to enclose the side surface of the overturned tray. The end of the vibration sand removing device is used to connect with the underground sand vibration screen circulating system. The device has reasonable design, simple structure and good cleaning effect, can clean the sand on the non-smooth surface of the tray, has high utilization rate, and is suitable for large-scale promotion.

Description

Technical Field

[0001] This invention belongs to the field of casting equipment, and relates to vertical silo conveyor lines, and more particularly to an automatic cleaning device for tray molding sand in vertical silo conveyor lines. Background Technology

[0002] Vertical storage units (AS / RS) provide three-dimensional storage space, enabling the storage of workpieces and tools in a vertical manner, effectively improving the space utilization of the workshop. For AS / RS conveyor lines used to store castings, forklifts are required to transfer pallets from the end of the conveyor line. Since a large amount of molding sand detaches from the surface of the casting blanks after cooling, this detached molding sand is conveyed to the end of the AS / RS conveyor line with the pallets. If the pallets need to be reused, the molding sand must be cleaned promptly, and the cleaned molding sand can be recycled through appropriate methods.

[0003] Traditional pallet cleaning is done manually, with workers sweeping the pallet surfaces with brooms. This method is labor-intensive, has a poor working environment, and is inefficient. Currently, workshops using motorized cleaning systems employ scrapers to scrape and clean the pallet surfaces. While scrapers are effective on relatively smooth pallets, their effectiveness is significantly reduced on pallets with structural or functional features. Furthermore, a considerable amount of molding sand ends up outside the conveyor belt, increasing the workload of floor cleaning. Summary of the Invention

[0004] This invention addresses the technical problems existing in the pallet cleaning equipment on the vertical warehouse conveyor line mentioned above, and proposes an automatic pallet sand cleaning equipment for vertical warehouse conveyor lines that is reasonably designed, has a good cleaning effect, and a high utilization rate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The automatic cleaning equipment for casting and molding sand on a vertical conveyor line provided by the present invention includes a frame, on which a pair of conveyor chains and a guard plate located on the outside of the conveyor chains are arranged. Trays for carrying castings and molding sand are arranged on the conveyor chains. A tilting brake device is arranged on the frame near the end of the conveyor chains. The tilting brake device includes an automatic gripping mechanism and a braking mechanism. The automatic gripping mechanism includes a pair of Y-shaped grippers, with a rotating shaft arranged in the middle of the grippers. Springs are arranged at both ends of the rotating shaft, and the springs are arranged in a support box to store force for the rotating shaft to tilt. The braking mechanism includes a ratchet sleeve arranged on the rotating shaft, and a ratchet plate is arranged on the braking side of the ratchet sleeve. The claw plate is rotatably mounted on the side wall of the support box. A brake cylinder is provided on one side of the claw plate, and a mobile cleaning device is provided on one side of the tilting brake device. The mobile cleaning device includes a front bucket and a rear bucket that are nested together. An air blowing mechanism is provided on the rear bucket, and an air pump is provided on the power end of the air blowing mechanism. The air blowing mechanism is used to clean the tilted tray with air. A reciprocating drive cylinder is provided on the side of the rear bucket, and a linkage mechanism is provided on the reciprocating drive cylinder. The linkage mechanism is connected to the front bucket and is used to control the opening and closing distance between the front bucket and the rear bucket. The front bucket and the rear bucket are used to protect the side of the tilted tray. A vibrating sand removal device is provided below the mobile cleaning device, and the end of the vibrating sand removal device is used to connect to the underground molding sand vibrating screen circulation system.

[0006] Preferably, the rear bucket includes an inclined rear plate, with rear side plates on both sides of the rear plate. The end face of the rear side plate facing the tray is a vertical surface. The front bucket includes a top rail, with a front side plate at the bottom of the top rail. The front side plate is movably fitted with an insertion slot on the rear plate. The end face of the front side plate facing the tray is an inclined surface. A tail plate is provided at the end of the front side plate facing away from the tray. A hinge pin for connecting to a linkage mechanism is provided on the side of the tail plate.

[0007] Preferably, the linkage mechanism includes a connecting seat connected to the telescopic end of the reciprocating drive cylinder. An L-shaped pull plate is provided on the connecting seat. A first connecting rod connected to a hinge shaft is provided above the pull plate. A second connecting rod is provided at the head end of the first connecting rod. The bottom of the second connecting rod is hinged to a fixed enclosure plate provided on the outside of the rear bucket. A sliding contact plate that cooperates with the end of the pull plate is provided on the side of the second connecting rod. The pull plate is used to pull the first connecting rod and the second connecting rod to produce a folding action and control the opening and closing action of the front bucket and the rear bucket.

[0008] Preferably, the rear bucket is provided with support shafts on both sides, and support guide rods are provided on the support shafts. The support guide rods are movably engaged with the guide shafts provided on the frame.

[0009] Preferably, the air blowing mechanism includes an integrated block disposed inside the rear hopper. The side of the integrated block facing the tray has an inclined air blowing surface. The air blowing surface is provided with a plurality of air blowing holes facing the tray surface. The air blowing holes communicate with an air cavity disposed inside the integrated block. The top of the integrated block is provided with a plurality of connecting nozzles. The connecting nozzles are provided with branch pipes. The input end of the branch pipe is disposed on an air distribution block. The air distribution block is disposed on the outside of the rear hopper and is provided with a main pipe.

[0010] Preferably, one side of the flipping braking device is provided with an anti-detachment device that is distributed in opposition to the front and rear of the mobile cleaning device.

[0011] Preferably, the anti-detachment device includes a telescopic cylinder, the telescopic end of which is provided with a movable seat, the movable seat is provided with a slide rail, a hook plate is provided in the slide rail, the head end of the hook plate is provided with a hook body, the end of the hook body is provided with multiple toothed grooves, the toothed grooves are used to hook with the side of the tray, the tail end of the hook plate is provided with a half shaft that cooperates with the slide rail, and the end of the slide rail is provided with a return spring connected to the hook plate.

[0012] Preferably, the gripper is provided with multiple rollers near its two ends, and the rolling surface of the rollers is used to slide and engage with the outer side of the head end of the hook.

[0013] Preferably, the gripper includes a central shaft plate, a C-shaped plate is provided on the outer edge of the central shaft plate, and gripper plates extending away from the central shaft plate are provided at both ends of the C-shaped plate. The ends of the gripper plates are provided with gripper teeth arranged at an angle to the gripper plates.

[0014] Preferably, the vibratory sand removal device includes a sand receiving chute, and a vibratory motor and support legs are provided at the bottom of the sand receiving chute.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0016] 1. The automatic sand cleaning equipment for palletized molding sand in the vertical conveyor line provided by this invention involves the pallet entering the clamping range of the automatic gripping mechanism as it is conveyed by the conveyor chain. While the pallet is clamped by the grippers, it continues to flip under the push of the conveyor chain and is braked by the braking mechanism until the pallet leaves the conveyor chain's conveying surface. The pallet flips over, dumping most of the molding sand into the vibrating sand removal device, while the remaining molding sand is cleaned by air blowing from the moving cleaning device. During the cleaning process, the front and rear buckets protect the pallet, improving the cleaning effect and preventing the molding sand from falling outside the conveyor line. The cleaned and recycled molding sand can enter the underground molding sand vibrating screen circulation system for processing and then enter the recycling program.

[0017] 2. The automatic sand cleaning equipment for pallets on vertical warehouse conveyor lines provided by this invention, after cleaning the pallet, releases the brake mechanism, and the automatic pallet gripping mechanism pushes the pallet back towards the conveyor chain. The moving cleaning device is then released from maintenance and moves away from the side of the pallet, making it easy for forklifts in the workshop to transfer the pallet away from the conveyor line. This device has a reasonable design, simple structure, and good cleaning effect. It can clean molding sand from pallets with non-smooth surfaces, has a high utilization rate, and is suitable for large-scale promotion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 An isometric drawing of an automatic sand cleaning system (without vibration sand removal device) for a vertical warehouse conveyor line.

[0020] Figure 2 The front view of the automatic cleaning equipment for pallet molding sand on the vertical warehouse conveyor line;

[0021] Figure 3 Side view of the automatic cleaning equipment for the pallet molding sand in the vertical warehouse conveyor line;

[0022] Figure 4 A partial sectional view of the automatic cleaning equipment for the pallet molding sand in the vertical warehouse conveyor line in the DD direction;

[0023] Figure 5 This is a schematic diagram showing the operation of the tray in a horizontal position with the automatic tray gripping mechanism, the moving cleaning device, and the anti-detachment device.

[0024] Figure 6 An isometric view of the pallet in a horizontal position with the automatic pallet gripping mechanism, the moving cleaning device, and the anti-detachment device.

[0025] Figure 7 This is a schematic diagram showing the operation of the tray in the flipped position with the automatic tray gripping mechanism, the mobile cleaning device, and the anti-detachment device.

[0026] Figure 8 An isometric view of the pallet in the flipped position with the automatic pallet gripping mechanism, the moving cleaning device, and the anti-detachment device.

[0027] Figure 9 A diagram illustrating the flipping state operation of the flipping braking device provided in the embodiment;

[0028] Figure 10 A front view of the overturning braking device in its overturning state provided in the embodiment;

[0029] Figure 11 Working diagram of the shaft and spring;

[0030] In the above figures, 1. Frame; 2. Conveyor chain; 3. Guard plate; 4. Pallet; 5. Tilting brake device; 51. Automatic gripping mechanism; 511. Gripper; 511a. Central shaft plate; 511b. C-shaped plate; 511c. Claw plate; 511d. Claw teeth; 512. Rotating shaft; 513. Spring; 52. Braking mechanism; 521. Ratchet sleeve; 522. Ratchet plate; 523. Brake cylinder; 6. Support box; 7. Moving cleaning device; 71. Front bucket; 711. Top rail; 712. Front side plate; 713. Tail plate; 714. Hinge shaft; 72. Rear bucket; 721. Rear plate; 722. Rear side plate; 723. Insertion port; 73. Air blowing mechanism; 73 1. Integrated block; 732. Air blow hole; 733. Air chamber; 734. Connecting nozzle; 735. Branch pipe; 736. Air distribution block; 737. Main pipe; 74. Reciprocating drive cylinder; 75. Support shaft; 76. Support guide rod; 77. Linkage mechanism; 771. Connecting seat; 772. Pull plate; 773. First connecting rod; 774. Second connecting rod; 775. Sliding contact plate; 8. Vibrating sand removal device; 81. Sand receiving chute; 82. Vibrating motor; 83. Support leg; 9. Anti-detachment device; 91. Telescopic cylinder; 92. Movable seat; 93. Slide rail; 94. Hook plate; 95. Hook body; 96. Tooth groove; 97. Return spring; 10. Roller shaft; 11. Fixed enclosure plate. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0032] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0033] Examples, such as Figures 1-11As shown, the automatic cleaning equipment for casting and molding sand on the vertical warehouse conveyor line provided by the present invention includes a frame 1. A pair of conveyor chains 2 and a guard plate 3 located outside the conveyor chains 2 are provided on the frame 1. The conveyor chains 2 are provided with a tray 4 for carrying castings and molding sand. The guard plate 3 can limit the left and right swing of the tray 4, so that it can achieve stable linear transmission. To improve the cleaning efficiency of this device for type 4 sand, the frame 1 provided by this invention is equipped with a tilting brake device 5 near the end of the conveyor chain 2. The tilting brake device 5 includes an automatic gripping mechanism 51 and a braking mechanism 52. The automatic gripping mechanism 51 includes a pair of Y-shaped grippers 511, with a rotating shaft 512 in the middle of the grippers 511. Springs 513 are installed at both ends of the rotating shaft 512 and are housed in the support box 6 to store force for the tilting of the rotating shaft 512. The braking mechanism 52 includes a ratchet sleeve 521 mounted on the rotating shaft 512. A pawl plate 522 is installed on the braking side of the ratchet sleeve 521 and is rotatably mounted on the side wall of the support box 6. A brake cylinder 523 is installed on one side of the pawl plate 522. A mobile cleaning device 7 is provided on one side of the rotating braking device 5. The mobile cleaning device 7 includes a front bucket 71 and a rear bucket 72 that are nested in a front-to-back motion. An air blowing mechanism 73 is provided on the rear bucket 72. An air pump (not shown in the figure) is provided at the power end of the air blowing mechanism 73. The air blowing mechanism 73 is used to clean the overturned tray 4 with air. A reciprocating drive cylinder 74 is provided on the side of the rear bucket 72. A linkage mechanism 77 is provided on the reciprocating drive cylinder 74. The linkage mechanism 77 is connected to the front bucket 71 and is used to control the opening and closing distance between the front bucket 71 and the rear bucket 72. The front bucket 71 and the rear bucket 72 are used to protect the side of the overturned tray 4. A vibrating sand removal device 8 is provided below the mobile cleaning device 7. The end of the vibrating sand removal device 8 is used to connect to the underground molding sand vibrating screen circulation system.

[0034] Specifically, as the pallet 4 is conveyed by the conveyor chain 2, it enters the clamping range of the automatic gripping mechanism 51. The gripper 511 is in a tilted state at one end in the forward direction of the pallet 4. As the pallet 4 continues to move forward, the gripper 511 gradually begins to flip to a horizontal position until both ends of the gripper 511 are just locked at both ends of the pallet 4. The spring spring 513 stores a certain amount of restoring force due to deformation, but it remains in a non-reverse state under the action of the ratchet sleeve 521 and the ratchet plate 522. After the gripper 511 has fully clamped the pallet 4, part of the pallet 4 is still on the conveyor chain 2 and continues to move forward under the push of the conveyor chain 2. This forward pressure causes the automatic gripping mechanism 51 to flip until the pallet 4 leaves the conveying surface of the conveyor chain 2. The pallet 4, together with the gripper 511, presents a flipped posture, and most of the molding sand is poured into the vibrating sand removal device 8 in a flipping manner.

[0035] Furthermore, the mobile cleaning device 7 can start simultaneously with the flipping of the pallet 4. The pallet 4 tilts towards the mobile cleaning device 7, and the reciprocating drive cylinder 74 pulls the front bucket 71 and rear bucket 72 to move synchronously. At the same time, the linkage mechanism 77 also operates in conjunction, thereby controlling the opening of the front bucket 71 and rear bucket 72. The inclined end face of the front bucket 71 rests against the surface of the pallet 4, forming a relatively enclosed space that protects the pallet 4. Gas is output from the air pump to the air blowing mechanism 73, causing another portion of the molding sand adhering to the surface of the pallet 4 to leave the pallet 4 under pneumatic power, preventing the molding sand from falling outside the conveyor line and entering the vibrating sand removal device 8 below. The cleaned and recovered molding sand can then enter the underground molding sand vibrating screen circulation system for processing and recycling.

[0036] Furthermore, after cleaning pallet 4, the braking mechanism 52 releases the brake, meaning the brake cylinder 523 pulls the ratchet plate 522 away from the ratchet sleeve 521. The restoring force of the spring 513 causes pallet 4 to flip in the opposite direction of the conveyor chain 2, allowing pallet 4 to land on the conveyor surface of the conveyor chain 2. Since the ratchet sleeve 521 and the ratchet plate 522 no longer provide a backstop effect, the automatic pallet gripping mechanism 51 pushes pallet 4 in the opposite direction toward the conveyor chain 2. Pallet 4 no longer moves significantly at the horizontal position at the end of the conveyor chain 2, remaining in a slippery state. Simultaneously, the reciprocating drive cylinder 74 drives the front bucket 71 and the rear bucket 72 to release their maintenance and move away from the side of pallet 4. This allows pallet 4 to be in a relatively free state, making it easier for forklifts in the workshop to lift pallet 4 off the conveyor line and transfer it away. Therefore, this device is reasonably designed, has a simple structure, and provides good cleaning results. It can clean molding sand from non-smooth surfaces of pallet 4 and has a high utilization rate.

[0037] To improve the containment effect of the rear bucket 72 and the front bucket 71, the rear bucket 72 provided by the present invention includes an inclined rear plate 721, and rear side plates 722 are provided on both sides of the rear plate 721. The end face of the rear side plate 722 facing the tray 4 is a vertical surface. The front bucket 71 includes a top rail 711, and a front side plate 712 is provided at the bottom of the top rail 711. The front side plate 712 is movably engaged with the through-hole provided on the rear plate 721. The end face of the front side plate 712 facing the tray 4 is an inclined surface. A tail plate 713 is provided at the end of the front side plate 712 facing away from the tray 4. A hinge pin 714 for connecting with the linkage mechanism 77 is provided on the side of the tail plate 713. In this way, the front bucket 71 and the rear bucket 72 can open along the interlocking opening and the mating surface of the front side plate 712. After opening, the top rail 711 presses against the top of the tray 4 in the flipped state, and the front end of the front side plate 712 presses against the surface of the tray 4. The front side plate 712, the rear side plate 722, the tray 4 itself, and the rear plate 721 together form a relatively enclosed environment, which helps to reduce the volume of molding sand flowing out. At the same time, the rear plate 721 provides an installation base for the air blowing mechanism 73, which helps the working surface of the air blowing mechanism 73 to effectively cover the surface of the molding sand adhering to the tray 4, thereby ensuring the cleaning effect of this device on the molding sand on the tray 4.

[0038] To improve the opening efficiency of the front bucket 71 and the rear bucket 72, in addition to establishing a connection between the two sides of the rear bucket 72 and the telescopic ends of the reciprocating drive cylinder 74, the linkage mechanism 77 provided by the present invention includes a connecting seat 771 connected to the telescopic ends of the reciprocating drive cylinder 74. An L-shaped pull plate 772 is provided on the connecting seat 771. A first connecting rod 773 connected to the hinge shaft 714 is provided above the pull plate 772. A second connecting rod 774 is provided at the head end of the first connecting rod 773. The bottom of the second connecting rod 774 is hinged to the fixed enclosure plate 11 provided on the outside of the rear bucket 72. A sliding contact plate 775 that cooperates with the end of the pull plate 772 is provided on the side of the second connecting rod 774. The pull plate 772 is used to pull the first connecting rod 773 and the second connecting rod 774 to produce a folding action and control the front bucket 71 and the rear bucket 72 to produce an opening and closing action. In this way, while the reciprocating drive cylinder 74 pulls the rear bucket 72 to move, the front bucket 71 also translates. In particular, the end of the pull rod hooks the second connecting rod 774 to flip, causing the first connecting rod 773 to fold. The front bucket 71, on top of its synchronous movement with the rear bucket 72, generates an additional translational distance, thus allowing it to open within a reasonable range with the rear bucket 72, thereby forming a protective enclosure around the pallet 4 to prevent molding sand leakage. During the return of the moving cleaning device 7 to its original position, the rear plate 721 drives the tail plate 713 to retract synchronously, while the pull rod gradually moves away from the sliding contact plate 775. Moreover, the linkage mechanism 77, under its own weight, causes the front bucket 71 and the rear bucket 72 to close, thus avoiding the area around the forklift from moving the pallet 4 after resetting, without affecting the forklift's transfer of the pallet 4.

[0039] To improve the translational stability of the rear bucket 72, the present invention provides support shafts 75 on both sides of the rear bucket 72, and support guide rods 76 are provided on the support shafts 75. The support guide rods 76 are movably engaged with the guide shafts provided on the frame 1. During the translational process, the rear bucket 72 drives the support guide rods 76 to translate along the guide shaft, thereby achieving both translational guidance and structural support, and ensuring the mobility of the rear bucket 72.

[0040] To improve cleaning efficiency, the air blowing mechanism 73 provided by the present invention includes an integrated block 731 disposed inside the rear bucket 72. The side of the integrated block 731 facing the tray 4 is an inclined air blowing surface. Several air blowing holes 732 facing the surface of the tray 4 are provided on the air blowing surface. The air blowing holes 732 communicate with the air chamber 733 disposed inside the integrated block 731. Multiple connecting nozzles 734 are provided on the top of the integrated block 731. Branch pipes 735 are provided on the connecting nozzles 734. The input end of the branch pipe 735 is disposed on the air distribution block 736. The air distribution block 736 is disposed on the outside of the rear bucket 72 and is provided with a main pipe 737. The main pipe 737 is connected to the air pump, which supplies gas to the air chamber 733 through the main pipe 737, air distribution block 736, branch pipe 735, and connecting nozzle 734. The gas in the air chamber 733 is distributed to the surface of the tray 4 through the integrated block 731, and blows off the molding sand adhering to the surface of the tray 4 with a reasonable pressure without leaving the enclosure of the front hopper 71 and the rear hopper 72. The rear hopper 72 provides an installation foundation for the air blowing mechanism 73, and the enclosed space formed by the rear hopper 72 and the front hopper 71 is sufficient to accommodate the integrated block 731, achieving space optimization and improving the space utilization rate of the equipment.

[0041] In order to improve the stability of the molding sand after the pallet 4 is overturned, the present invention provides an anti-detachment device 9 on one side of the overturning braking device 5, which is distributed in opposite directions to the moving cleaning device 7.

[0042] Specifically, the anti-detachment device 9 includes a telescopic cylinder 91, a movable seat 92 is provided at the telescopic end of the telescopic cylinder 91, a slide 93 is provided on the movable seat 92, a hook plate 94 is provided inside the slide 93, a hook body 95 is provided at the head end of the hook plate 94, and a plurality of toothed grooves 96 are provided at the end of the hook body 95. The toothed grooves 96 are used to hook with the side of the tray 4. The bottom ring of the tray 4 is generally provided with a structural groove for the toothed grooves 96 to hook with. A half shaft that cooperates with the slide 93 is provided at the tail end of the hook plate 94, and a return spring that connects to the hook plate 94 is provided at the end of the slide 93. While the pallet 4 is held by the automatic gripping mechanism 51 under the action of the conveyor chain 2, the telescopic cylinder 91 drives the movable seat 92 and the hook plate 94 to move in the direction of the gripper 511 until the hook plate 94 opens along the side of the pallet 4 and hooks onto the side of the pallet 4. As the pallet 4 is flipped by the automatic gripping mechanism 51, the hook plate 94 generates an upward angle and maintains the connection with the pallet 4 until the surface of the pallet 4 is cleaned.

[0043] To facilitate the detachment of the hook plate 94 from the pallet 4 after it returns to the conveyor chain 2, the present invention provides multiple rollers 10 near both ends of the gripper 511. The rolling surfaces of the rollers 10 are used to slide and engage with the outer side of the head end of the hook body 95. Thus, after the pallet 4 returns to the conveyor chain 2, the hook plate 94 tends to detach from the pallet 4. The gripper 511, facing the hook plate 94, tilts towards the hook plate 94 under the restoring force of the spring 513. The rollers 10 then lift the hook plate 94, which retracts back to its original position under the action of the return spring. The telescopic cylinder 91 carries the movable seat 92 and the hook plate 94 away from the pallet 4. It should be noted that the maximum height of the hook plate 94 and hook body 95 in their natural state is lower than the conveying level of the pallet 4. This does not affect the normal conveying of the pallet 4, and allows them to hook onto the side of the pallet 4 by creating an angle through contact with the rollers 10.

[0044] To improve the clamping performance of the gripper 511, the gripper 511 provided by the present invention includes a central shaft plate 511a, a C-shaped plate 511b disposed on the outer edge of the central shaft plate 511a, and claw plates 511c extending away from the central shaft plate 511a disposed at both ends of the C-shaped plate 511b. Claw teeth 511d disposed at the ends of the claw plates 511c at an angle to the claw plates 511c. The central shaft plate 511a provides a shaft hole for the rotating shaft 512, and a flange is disposed on the rotating shaft 512 for connection with the flange of the central shaft plate 511a. The claw plates 511c provide a reasonable clamping span to cooperate with the tray 4, and the claw teeth 511d engage with the front and rear ends of the tray 4.

[0045] To improve the sand delivery performance of the vibrating sand removal device 8 to the underground molding sand vibrating screen circulation system, the vibrating sand removal device 8 provided by the present invention includes a sand receiving chute 81, with a vibrating motor 82 and support legs 83 installed at the bottom of the sand receiving chute 81. The vibrating motor 82 serves as the vibration source, causing the sand receiving chute 81 to transport molding sand to the underground molding sand vibrating screen circulation system in a vibrating manner. This results in good conveying effect and prevents molding sand from accumulating over a large area on the sand receiving chute 81.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An automatic cleaning device for molding sand trays on a vertical conveyor line, comprising a frame, wherein a pair of conveyor chains and a guard plate located outside the conveyor chains are arranged on the frame, and trays for carrying castings and molding sand are arranged on the conveyor chains, characterized in that, The rack is provided with a turnover brake device near the conveying end of the conveying chain, the turnover brake device comprises an automatic grab disc mechanism and a brake mechanism, the automatic grab disc mechanism comprises a pair of Y-shaped clamping jaws, a rotating shaft is arranged in the middle of the clamping jaws, a clockwork spring is arranged at both ends of the rotating shaft, the clockwork spring is arranged in a support box and is used for accumulating power for the rotating shaft generating turnover, the brake mechanism comprises a ratchet sleeve arranged on the rotating shaft, a pawl plate is arranged on the brake side of the ratchet sleeve, the pawl plate is rotationally arranged on the side wall of the support box, a brake cylinder is arranged on one side of the pawl plate, the tray enters the clamping range of the automatic grab disc mechanism under the conveying of the conveying chain, the clamping jaws are in a raised state at one end thereof in the advancing direction of the tray, the continuous advancement of the tray causes the clamping jaws to gradually start to turn over to the horizontal position until the two ends of the clamping jaws are just clamped on the two ends of the tray, the clockwork spring restores the force due to the change, and the ratchet sleeve and the pawl plate are kept in the reverse stopping state; after the clamping jaws completely clamp the tray, a part of the tray is still located on the conveying chain and continues to advance under the pushing of the conveying chain, the advancing pressure causes the automatic grab disc mechanism to turn over; one side of the turnover brake device is provided with a movable cleaning device, the movable cleaning device comprises a front bucket and a rear bucket movably nested in front and back, the rear bucket is provided with a air blowing mechanism, a power end of the air blowing mechanism is provided with an air pump, the air blowing mechanism is used for air blowing and cleaning the turned-over tray, a reciprocating drive cylinder is arranged on the side of the rear bucket, the two sides of the rear bucket are connected with the extension and retraction ends of the reciprocating drive cylinder, a connecting rod mechanism is arranged on the reciprocating drive cylinder, the connecting rod mechanism is connected with the front bucket and is used for controlling the opening and closing distance of the front bucket and the rear bucket, the front bucket and the rear bucket are used for surrounding the side of the turned-over tray, and a vibration sand removing device is arranged below the movable cleaning device, and the tail end of the vibration sand removing device is used for connecting with an underground sand vibrating screen circulating system.

2. The pallet type sand automatic cleaning apparatus for a storage and retrieval system according to claim 1, wherein The rear bucket comprises an inclined rear plate, rear side plates are arranged on the two sides of the rear plate, the end face of the rear side plate facing the tray is a vertical face, the front bucket comprises a top rail, a front side plate is arranged at the bottom of the top rail, the front side plate is movably matched with a penetrating hole arranged on the rear plate, the end face of the front side plate facing the tray is an inclined face, a tail plate is arranged on the end of the front side plate away from the tray, and a hinge shaft is arranged on the side of the tail plate and is used for connecting with the connecting rod mechanism.

3. The pallet type sand automatic cleaning apparatus for a storage and retrieval system conveyor line according to claim 2, characterized by, The connecting rod mechanism comprises a connecting seat connected with the extension and retraction ends of the reciprocating drive cylinder, an L-shaped pull plate is arranged on the connecting seat, a first connecting rod connected with the hinge shaft is arranged above the pull plate, a second connecting rod is arranged at the head end of the first connecting rod, the bottom of the second connecting rod is hingedly connected with a fixed surrounding plate arranged outside the rear bucket, a sliding contact plate matched with the end of the pull plate is arranged on the side of the second connecting rod, and the pull plate is used for pulling the first connecting rod and the second connecting rod to produce folding action and control the opening and closing action of the front bucket and the rear bucket.

4. The pallet type sand automatic cleaning apparatus for a storage and retrieval system according to claim 3, wherein Support shafts are arranged on the two sides of the rear bucket, and support guide rods are arranged on the support shafts and movably matched with guide shafts arranged on the rack.

5. The racking line tray-type sand automatic cleaning apparatus according to claim 1, characterized by, The air blowing mechanism comprises an integrated block arranged inside the rear bucket, the side of the integrated block facing the tray is an inclined air blowing surface, a plurality of air blowing holes are arranged on the air blowing surface and face the surface of the tray, the air blowing holes are communicated with air cavities arranged inside the integrated block, a plurality of connecting mouths are arranged on the top of the integrated block, branch pipes are arranged on the connecting mouths, the input ends of the branch pipes are arranged on a gas distribution block, the gas distribution block is arranged outside the rear bucket and is provided with a main pipe.

6. The racking line tray-type sand automatic cleaning apparatus according to claim 1, characterized by, One side of the turnover brake device is provided with anti-dropping devices distributed opposite to each other in front and back of the moving cleaning device.

7. The racking line tray-type sand automatic cleaning apparatus according to claim 6, characterized by The anti-dropping device comprises a telescopic cylinder, the telescopic end of the telescopic cylinder is provided with a movable seat, the movable seat is provided with a slide, the slide is provided with a hook plate inside, the head end of the hook plate is provided with a hook body, the end of the hook body is provided with a plurality of tooth grooves, the tooth grooves are used to hook the side edge of the tray, the tail end of the hook plate is provided with a half shaft matched with the slide, the end of the slide is provided with a reset spring connected with the hook plate.

8. The racking line tray-type sand automatic cleaning apparatus according to claim 7, characterized by, The clamping jaw is provided with a plurality of roller shafts near the positions of the two ends thereof, the rolling surface of the roller shaft is used to slide and match the outside of the head end of the hook body.

9. The racking line tray-type sand automatic cleaning apparatus according to claim 1, characterized by, The clamping jaw comprises a middle shaft plate, the outer edge of the middle shaft plate is provided with a C-shaped plate, the two ends of the C-shaped plate are provided with claw plates extending away from the middle shaft plate, the end of the claw plate is provided with claw teeth arranged at an angle with the claw plate.

10. The racking line tray-type sand automatic cleaning apparatus according to claim 1, characterized by, The sand removing device comprises a sand receiving chute, the bottom of the sand receiving chute is provided with a vibration motor and a supporting leg.

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