Screening device for casting molding sand

Abstract

The invention relates to the technical field of foundry molding sand, in particular to a foundry molding sand screening device which comprises a bottom frame, the upper end of the bottom frame is fixedly connected with a first supporting column and a second supporting column, the upper end of the first supporting column is fixedly connected with a first ring shell, and the inner side of the first ring shell is rotationally connected with a first rotating cylinder; a second ring shell is fixedly connected to the upper end of the second supporting column, a second rotating cylinder is rotationally connected to the inner side of the second ring shell, a screening assembly used for screening casting molding sand is arranged between the first rotating cylinder and the second rotating cylinder, a supporting plate is fixedly connected to the upper end of the bottom frame, and a protection cylinder is fixedly connected to the upper end of the supporting plate. According to the casting molding sand screening device, the casting molding sand can be screened through rotation of the second screening barrel and the first screening barrel, meanwhile, vibration can be generated in the rotation process of the first screening barrel and the second screening barrel, and the screening efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundry sand, in particular to a screening device for foundry sand. Background Art

[0002] Molding sand is one of the necessary materials in the metal casting industry. In order to avoid material waste, the molding sand needs to be recycled and reused after the casting is molded and demolded. During the casting process, the molding sand will inevitably form a lump, and some of the molding sand close to the mold cavity will also be mixed with a lot of steel slag. When the molding sand is recycled, the molding sand needs to be broken and screened, and then recycled after removing the steel slag. Casting sand screening is an important part of the casting sand processing process. Its purpose is to remove impurities and adjust the particle size distribution of the sand material to meet the requirements of the casting process. The casting sand screening method can be divided into vibration screening and drum screening. The existing casting sand will produce fly ash during the screening process, causing a dirty working environment, and the drum screening device will screen the casting sand again, making it easy for the sand to block the main screening hole, resulting in reduced screening efficiency. For this reason, we propose a screening device for casting sand. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a screening device for foundry sand.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a screening device for foundry sand, comprising a base frame, the upper end of the base frame is fixedly connected to a first support column and a second support column, the upper end of the first support column is fixedly connected to a first annular shell, the inner side of the first annular shell is rotatably connected to a first rotating drum, the upper end of the second support column is fixedly connected to a second annular shell, the inner side of the second annular shell is rotatably connected to a second rotating drum, a screening assembly for screening foundry sand is arranged between the first rotating drum and the second rotating drum, the upper end of the base frame is fixedly connected to a support plate, the upper end of the support plate is fixedly connected to a protective cylinder, the inner side of the protective cylinder is provided with a vibration assembly for assisting the screening assembly in screening foundry sand, and the second rotating drum and the first rotating drum are both rotatably connected to the inner side of the protective cylinder.

[0005] Preferably, a driving motor is installed at the upper end of the base frame, a second gear ring is fixedly connected to the outer side of the second rotating drum, a first gear is fixedly connected to the output end of the driving motor, and the first gear is meshed with the second gear ring.

[0006] Preferably, the screening assembly includes a first connecting ring and a second connecting ring, one side of the first connecting ring is fixedly connected to the first screening cylinder, one side of the second connecting ring is fixedly connected to the second screening cylinder, a connecting shell is fixedly connected between the first screening cylinder and the second screening cylinder, the connecting shell is cone-shaped, the first connecting ring is sleeved on the outer side of the first rotating cylinder, the second connecting ring is located on the inner side of the second rotating cylinder, four groups of mutually symmetrical shock-absorbing components are arranged at the upper and lower ends of the first connecting ring, and four groups of mutually symmetrical shock-absorbing components are arranged at the upper and lower ends of the second connecting ring.

[0007] Preferably, the shock absorbing assembly includes a first slide cylinder, the inner side of which is slidably connected to a first plug column, the lower end of which is fixedly connected to a first spring, and the first spring is located on the inner side of the first slide cylinder.

[0008] Preferably, the vibration assembly includes a rotating column rotatably connected to the protective tube, one end of the rotating column is fixedly connected to an eccentric disk, one end of the eccentric disk is rotatably connected to a rocker rod, one end of the rocker rod is rotatably connected to a sliding rod, and multiple groups of striking assemblies are provided on one side of the sliding rod, and connecting rods are fixedly connected between the multiple groups of striking assemblies.

[0009] Preferably, two groups of V-shaped frames are fixedly connected to the inner side of the protection cylinder, and a guard plate is fixedly connected to the lower end of the V-shaped frame. The two groups of guard plates are respectively fitted with the second screening cylinder and the first screening cylinder, and the striking assembly includes a second plug column fixedly connected to the V-shaped frame, a second slide cylinder is slidably connected to the outer side of the second plug column, a third slide cylinder is slidably connected to the outer side of the second slide cylinder, an insertion rod is fixedly connected to the lower end of the second slide cylinder, and a through hole is opened at the lower end of the third slide cylinder, and the through hole fits with the insertion rod.

[0010] Preferably, a second spring is provided on the inner side of the third slide cylinder, the insertion rod is located on the inner side of the second spring, one end of the second spring is fixedly connected to the third slide cylinder, the lower end of the second spring is fixedly connected to the third slide cylinder, the lower end of the second insertion column is fixedly connected with a baffle, the lower end of the baffle is fixedly connected with the third spring, the third spring is located on the inner side of the second slide cylinder, and the third spring is fixedly connected to the second slide cylinder.

[0011] Preferably, a first gear ring is fixedly connected to the outer side of the second rotating cylinder, the first gear ring is located on the inner side of the protective cylinder, a second gear is fixedly connected to the outer side of the rotating column, the second gear is meshed with the first gear ring, one end of the eccentric disk is fixedly connected to the eccentric column, and the rocker arm is rotatably connected to the eccentric column.

[0012] Preferably, two groups of fixed blocks are fixedly connected to the inner side of the V-shaped frame, a limiting rail is fixedly connected between the two groups of fixed blocks, a sliding groove is opened on one side of the limiting rail, the sliding rod is slidably connected to the inner side of the sliding groove, the inner side of the sliding rod is rotatably connected to a connecting shaft, and the connecting shaft is fixedly connected to the rocker arm.

[0013] Compared with the prior art, the present invention provides a screening device for foundry sand, which has the following beneficial effects: 1. A screening device for casting sand, wherein the first gear can utilize the second gear ring to drive the second rotating drum to rotate on the inner side of the second ring shell, so as to conveniently drive the screening assembly to rotate, and utilize the screening assembly to screen the casting sand, and utilize the vibration reducing assembly to connect the second rotating drum, the second screening drum, the first screening drum, and the first rotating drum, so that the second rotating drum can drive the screening assembly to rotate, and when the vibration reducing assembly rotates to the bottom, the first plug column will slide toward the inner side of the first sliding drum, so that the first spring will contract, at this time, the first plug column of the upper shock absorbing assembly will slide toward the outer side of the first sliding drum, so that the first connecting ring and the first screening drum vibrate, and then the first screening drum and the second screening drum vibrate, so as to improve the screening efficiency of the casting sand, and the casting sand can be screened by the rotation of the second screening drum and the first screening drum, and at the same time, the first screening drum and the second screening drum will vibrate during the rotation, so as to improve the screening efficiency.

[0014] 2. This screening device for casting sand drives the second gear to rotate through the first gear ring, and then uses the rotating column to drive the second gear to rotate, so that the eccentric column drives the lower end of the rocker arm to deflect, and pulls the sliding rod to slide on the inner side of the slide groove through the rocker arm, thereby driving the striking assembly to move downward, so that the third slide cylinder hits the screening assembly, and the second screening cylinder and the first screening cylinder vibrate, thereby further improving the screening efficiency, and the debris blocked on the inner side of the screening holes on the second screening cylinder and the first screening cylinder can be cleaned by the insertion rod, thereby reducing the blockage of the screening holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention is cut away Figure 1 ; Figure 3 The present invention is cut away Figure 2 ; Figure 4 The present invention is cut away Figure 3 ; Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle; Figure 6 It is a schematic diagram of the structure of the vibration component of the present invention; Figure 7 The vibrating assembly of the present invention is cut away Figure 1 ; Figure 8 The vibrating assembly of the present invention is cut away Figure 2 ; Fig. 9 The structure diagram of the vibration component of the present invention is shown in FIG. Figure 1 ; Fig.10 The structure diagram of the vibration component of the present invention is shown in FIG. Figure 2 .

[0016] In the figure: 1, base frame; 2, first support column; 3, first ring shell; 4, first rotating drum; 5, screening assembly; 51, first connecting ring; 52, first screening drum; 53, second connecting ring; 54, second screening drum; 55, connecting shell; 56, first sliding drum; 57, first plug column; 58, first spring; 6, protective cylinder; 7, vibration assembly; 71, rotating column; 72, second gear; 73, eccentric disk; 74, swing rod; 75, limit rail; 76, slide rod; 77, striking assembly; 771 , second slide; 772, second plug column; 773, third slide; 774, plug rod; 775, second spring; 776, baffle; 777, third spring; 78, connecting rod; 79, eccentric column; 710, connecting shaft; 711, slide groove; 712, fixing block; 8, V-shaped frame; 9, guard plate; 10, first gear ring; 11, driving motor; 12, first gear; 13, second gear ring; 14, support plate; 15, second support column; 16, second ring shell; 17, second rotating drum. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] See also Figure 1 - Fig.10 A screening device for foundry sand comprises a base frame 1, a first support column 2 and a second support column 15 are fixedly connected to the upper end of the base frame 1, a first annular shell 3 is fixedly connected to the upper end of the first support column 2, a first rotating drum 4 is rotatably connected to the inner side of the first annular shell 3, a second support column 15 is fixedly connected to the upper end of the second support column 15, a second rotating drum 17 is rotatably connected to the inner side of the second annular shell 16, a screening assembly 5 for screening foundry sand is arranged between the first rotating drum 4 and the second rotating drum 17, a support plate 14 is fixedly connected to the upper end of the base frame 1, a protective cylinder 6 is fixedly connected to the upper end of the support plate 14, a vibration assembly 7 for assisting the screening assembly 5 in screening foundry sand is arranged on the inner side of the protective cylinder 6, and the second rotating drum 17 and the first rotating drum 4 are both rotatably connected to the inner side of the protective cylinder 6.

[0019] In this embodiment, a driving motor 11 is installed on the upper end of the base frame 1, a second gear ring 13 is fixedly connected to the outer side of the second rotating drum 17, a first gear 12 is fixedly connected to the output end of the driving motor 11, and the first gear 12 is meshed with the second gear ring 13.

[0020] Specifically, the driving motor 11 can drive the first gear 12 to rotate, and then the second gear ring 13 can drive the second rotating drum 17 to rotate, so that the screening assembly 5 can rotate, and then the foundry sand is screened.

[0021] In this embodiment, the screening assembly 5 includes a first connecting ring 51 and a second connecting ring 53. One side of the first connecting ring 51 is fixedly connected to the first screening cylinder 52, and one side of the second connecting ring 53 is fixedly connected to the second screening cylinder 54. A connecting shell 55 is fixedly connected between the first screening cylinder 52 and the second screening cylinder 54. The connecting shell 55 is cone-shaped. The first connecting ring 51 is sleeved on the outer side of the first rotating drum 4, and the second connecting ring 53 is located on the inner side of the second rotating drum 17. Four groups of mutually symmetrical shock-absorbing assemblies are arranged at the upper and lower ends of the first connecting ring 51, and four groups of mutually symmetrical shock-absorbing assemblies are arranged at the upper and lower ends of the second connecting ring 53.

[0022] The shock absorbing assembly includes a first slide cylinder 56 , the inner side of which is slidably connected to a first plug post 57 , the lower end of which is fixedly connected to a first spring 58 , and the first spring 58 is located on the inner side of the first slide cylinder 56 .

[0023] Specifically, the shock absorbing assembly and the connecting shell 55 can be used to connect the screening assembly 5 with the first rotating drum 4 and the second rotating drum 17, so that the second rotating drum 17 can drive the screening assembly 5 to rotate, so that the screening assembly 5 can screen the casting sand. The connecting shell 55 can facilitate the casting sand to slide from the inner side of the first screening drum 52 to the inner side of the second screening drum 54.

[0024] In this embodiment, the vibration assembly 7 includes a rotating column 71 rotatably connected to the protective tube 6, one end of the rotating column 71 is fixedly connected to an eccentric disk 73, one end of the eccentric disk 73 is rotatably connected to a rocker arm 74, one end of the rocker arm 74 is rotatably connected to a slide bar 76, and one side of the slide bar 76 is provided with multiple groups of striking assemblies 77, and connecting rods 78 are fixedly connected between the multiple groups of striking assemblies 77.

[0025] Two groups of V-shaped frames 8 are fixedly connected to the inner side of the protection cylinder 6, and a guard plate 9 is fixedly connected to the lower end of the V-shaped frame 8. The two groups of guard plates 9 are respectively fitted with the second screening cylinder 54 and the first screening cylinder 52. The striking assembly 77 includes a second plug column 772 fixedly connected to the V-shaped frame 8, a second slide cylinder 771 is slidably connected to the outer side of the second plug column 772, a third slide cylinder 773 is slidably connected to the outer side of the second slide cylinder 771, an insertion rod 774 is fixedly connected to the lower end of the second slide cylinder 771, and a through hole is opened at the lower end of the third slide cylinder 773, which fits with the insertion rod 774.

[0026] Specifically, the rotating column 71 can drive the eccentric disk 73 to rotate, and then the rocker arm 74 can drive the striking assembly 77 to move. The third slide cylinder 773 can strike the second screening cylinder 54 and the first screening cylinder 52 to further improve the screening efficiency of the screening assembly 5. The inserted rod 774 can push the debris out from the inside of the screening hole to reduce the blockage of the screening hole by the debris.

[0027] In this embodiment, a second spring 775 is provided on the inner side of the third slide cylinder 773, the insert rod 774 is located on the inner side of the second spring 775, one end of the second spring 775 is fixedly connected to the third slide cylinder 773, the lower end of the second spring 775 is fixedly connected to the third slide cylinder 773, the lower end of the second insert column 772 is fixedly connected with a baffle 776, the lower end of the baffle 776 is fixedly connected with a third spring 777, the third spring 777 is located on the inner side of the second slide cylinder 771, and the third spring 777 is fixedly connected to the second slide cylinder 771.

[0028] Specifically, the second spring 775 can facilitate the third slide cylinder 773 to slide downward, so that the third slide cylinder 773 can protect the insertion rod 774 again, and the blocking piece 776 can facilitate the second slide cylinder 771 to move upward, so that the second slide cylinder 771 can slide on the second insertion column 772.

[0029] In this embodiment, the outer side of the second rotating cylinder 17 is fixedly connected to the first gear ring 10, and the first gear ring 10 is located on the inner side of the protective cylinder 6. The outer side of the rotating column 71 is fixedly connected to the second gear 72, and the second gear 72 is meshed with the first gear ring 10. One end of the eccentric disk 73 is fixedly connected to the eccentric column 79, and the rocker arm 74 is rotatably connected to the eccentric column 79.

[0030] Specifically, the first gear ring 10 can drive the second gear 72 to rotate, thereby driving the rotation of the rotating column 71, so that the eccentric column 79 can drive the rocker 74 to deflect.

[0031] In this embodiment, two groups of fixed blocks 712 are fixedly connected to the inner side of the V-shaped frame 8, and a limiting rail 75 is fixedly connected between the two groups of fixed blocks 712. A sliding groove 711 is opened on one side of the limiting rail 75, and a sliding rod 76 is slidably connected to the inner side of the sliding groove 711. The inner side of the sliding rod 76 is rotatably connected to a connecting shaft 710, and the connecting shaft 710 is fixedly connected to the rocker arm 74.

[0032] Specifically, the slide bar 76 can be clamped by the slide groove 711 , and the slide bar 76 can be driven to slide inside the slide groove 711 by the swing rod 74 .

[0033] It should be noted that when in use, the casting sand is added to the first rotating drum 4, so that the casting sand slides to the inner side of the first screening drum 52, the driving motor 11 is started to drive the first gear 12 to rotate, and then the second gear ring 13 is used to drive the second rotating drum 17 to rotate on the inner side of the second ring shell 16, and the shock absorbing assembly is used to connect the second rotating drum 17, the second screening drum 54, the first screening drum 52, and the first rotating drum 4, so that the second rotating drum 17 can drive the screening assembly 5 to rotate, and then the first screening drum 52 and the second screening drum 54 are used to screen the casting sand. When the shock absorbing assembly rotates to the bottom, the first plug post 57 will slide to the inner side of the first sliding drum 56, so that the first spring 58 will contract. At this time, the first plug post 57 of the upper shock absorbing assembly will slide to the outer side of the first sliding drum 56, so that the first connecting ring 51 and the first screening drum 52 vibrate, so that the first screening drum 52 and the second screening drum 54 are connected. The second screening drum 54 vibrates to improve the screening efficiency of the molding sand. While the second rotating drum 17 rotates, the first gear ring 10 can be used to drive the second gear 72 to rotate, and then the rotating column 71 can be used to drive the second gear 72 to rotate, so that the eccentric column 79 drives the lower end of the rocker arm 74 to deflect, and the rocker arm 74 pulls the sliding rod 76 to slide on the inner side of the slide groove 711, thereby driving the striking assembly 77 to move downward, so that the third slide cylinder 773 hits the screening assembly 5, so that the second screening drum 54 and the first screening drum 52 vibrate, further increasing or decreasing the screening efficiency. The second slide cylinder 771 continues to move downward, so that the second slide cylinder 771 will move toward the inner side of the third slide cylinder 773, so that the insertion rod 774 passes through the through hole at the lower end of the third slide cylinder 773, and the insertion rod 774 is moved out from the inner side of the third slide cylinder 773, and the insertion rod 774 is used to clean the debris blocked in the screening holes on the second screening drum 54 and the first screening drum 52.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for foundry sand, comprising a base frame (1), characterized in that: The upper end of the base frame (1) is fixedly connected to a first support column (2) and a second support column (15); the upper end of the first support column (2) is fixedly connected to a first annular shell (3); the inner side of the first annular shell (3) is rotatably connected to a first rotating drum (4); the upper end of the second support column (15) is fixedly connected to a second annular shell (16); the inner side of the second annular shell (16) is rotatably connected to a second rotating drum (17); a screening assembly (5) for screening foundry sand is provided between the first rotating drum (4) and the second rotating drum (17); the base frame (1) The upper end of the base frame (1) is fixedly connected to a support plate (14), the upper end of the support plate (14) is fixedly connected to a protective cylinder (6), the inner side of the protective cylinder (6) is provided with a vibration component (7) for assisting the screening component (5) in screening the foundry sand, the second rotating cylinder (17) and the first rotating cylinder (4) are both rotatably connected to the inner side of the protective cylinder (6), the upper end of the base frame (1) is mounted with a drive motor (11), the outer side of the second rotating cylinder (17) is fixedly connected to a second gear ring (13), and the output end of the drive motor (11) is fixedly connected to a first gear ( 12), the first gear (12) is meshed with the second gear ring (13), the screening assembly (5) comprises a first connecting ring (51) and a second connecting ring (53), one side of the first connecting ring (51) is fixedly connected to a first screening cylinder (52), one side of the second connecting ring (53) is fixedly connected to a second screening cylinder (54), a connecting shell (55) is fixedly connected between the first screening cylinder (52) and the second screening cylinder (54), the connecting shell (55) is cone-shaped, and the first connecting ring (51) is sleeved on the first rotating cylinder (4). The second connecting ring (53) is located on the outer side of the second rotating cylinder (17), the upper and lower ends of the first connecting ring (51) are provided with four groups of mutually symmetrical shock absorbing components, the upper and lower ends of the second connecting ring (53) are provided with four groups of mutually symmetrical shock absorbing components, the shock absorbing components include a first slide cylinder (56), the inner side of the first slide cylinder (56) is slidably connected with a first plug column (57), the lower end of the first plug column (57) is fixedly connected with a first spring (58), and the first spring (58) is located on the inner side of the first slide cylinder (56).

2. A screening device for foundry sand according to claim 1, characterized in that: The vibration component (7) comprises a rotating column (71) rotatably connected to the protection tube (6); one end of the rotating column (71) is fixedly connected to an eccentric disk (73); one end of the eccentric disk (73) is rotatably connected to a swing rod (74); one end of the swing rod (74) is rotatably connected to a sliding rod (76); a plurality of groups of striking components (77) are provided on one side of the sliding rod (76); and a connecting rod (78) is fixedly connected between the plurality of groups of striking components (77).

3. A screening device for foundry sand according to claim 2, characterized in that: Two groups of V-shaped frames (8) are fixedly connected to the inner side of the protection tube (6), and a guard plate (9) is fixedly connected to the lower end of the V-shaped frame (8). The two groups of guard plates (9) are respectively fitted with the second screening tube (54) and the first screening tube (52). The striking assembly (77) includes a second plug column (772) fixedly connected to the V-shaped frame (8), a second slide cylinder (771) is slidably connected to the outer side of the second plug column (772), a third slide cylinder (773) is slidably connected to the outer side of the second slide cylinder (771), an insertion rod (774) is fixedly connected to the lower end of the second slide cylinder (771), and a through hole is opened at the lower end of the third slide cylinder (773), and the through hole is fitted with the insertion rod (774).

4. A screening device for foundry sand according to claim 3, characterized in that: A second spring (775) is provided on the inner side of the third slide cylinder (773), the insertion rod (774) is located on the inner side of the second spring (775), one end of the second spring (775) is fixedly connected to the third slide cylinder (773), the lower end of the second spring (775) is fixedly connected to the third slide cylinder (773), the lower end of the second insertion column (772) is fixedly connected to a blocking plate (776), the lower end of the blocking plate (776) is fixedly connected to a third spring (777), the third spring (777) is located on the inner side of the second slide cylinder (771), and the third spring (777) is fixedly connected to the second slide cylinder (771).

5. A screening device for foundry sand according to claim 3, characterized in that: The outer side of the second rotating cylinder (17) is fixedly connected to a first gear ring (10), the first gear ring (10) is located on the inner side of the protective cylinder (6), the outer side of the rotating column (71) is fixedly connected to a second gear (72), the second gear (72) is meshed with the first gear ring (10), one end of the eccentric disk (73) is fixedly connected to an eccentric column (79), and the rocker arm (74) is rotatably connected to the eccentric column (79).

6. A screening device for foundry sand according to claim 5, characterized in that: Two groups of fixed blocks (712) are fixedly connected to the inner side of the V-shaped frame (8); a limit rail (75) is fixedly connected between the two groups of fixed blocks (712); a slide groove (711) is provided on one side of the limit rail (75); the slide rod (76) is slidably connected to the inner side of the slide groove (711); a connecting shaft (710) is rotatably connected to the inner side of the slide rod (76); and the connecting shaft (710) is fixedly connected to the swing rod (74).

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