Screening device for raw materials of fireworks and crackers

Abstract

The utility model discloses a firework and cracker raw material screening device which comprises a fixing frame, a collecting barrel is connected to the fixing frame in a sliding mode, a screening barrel is rotationally connected into the collecting barrel, a conveying auger is fixedly connected to the fixing frame, and the screening barrel is connected to the conveying auger in a sliding mode. The fixing frame is further provided with a pushing assembly used for pushing the screening barrel to shake, the pushing assembly comprises two vertical rods rotationally connected to the fixing frame, cams are fixedly connected to the two vertical rods, and a contact ring is rotationally connected to the screening barrel. The screening barrel is driven to shake through the pushing assembly, so that the screening barrel and the discharging hopper move relatively, the discharging position of raw materials can be changed, excessive accumulation of the materials is avoided, and through shaking of the screening barrel, the materials in the screening barrel can be driven to shake in the horizontal direction while performing circular motion; therefore, the screening effect of the screening barrel on firework and cracker raw materials can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material screening devices, in particular to a fireworks and firecracker raw material screening device. Background Art

[0002] Fireworks and firecrackers refer to arts and crafts made from pyrotechnic powder as raw materials. They are entertainment products that burn (explode) through ignition sources and are accompanied by sound, light, color, smoke, fog and other effects. During their processing, a drum screen is needed to screen the raw materials of fireworks and firecrackers. The drum screen is a very widely used machine in screening technology. It controls the material sorting by the particle size and has high sorting accuracy.

[0003] For example, the Chinese utility model patent application number 202021052495.X, entitled "A Raw Material Screening Mechanical Device for Fireworks and Firecrackers Production," discloses a device comprising a support frame and a screening drum mounted on the support frame. The support frame comprises a base plate and a mounting platform mounted parallel to the base plate. Four sets of support columns are connected between the base plate and the mounting platform. The screening drum consists of an outer cylinder, an inner cylinder, and a drive mechanism. A feed hopper is mounted at the upper right corner of the outer cylinder, and a bracket is mounted at the bottom. Three sets of discharge ports are evenly spaced at the bottom of the outer cylinder. The lower ends of the discharge ports are connected to storage boxes via pipes. The three storage boxes are evenly spaced on the base plate. The inner cylinder is movably positioned within the outer cylinder and has a feed port at its upper right corner. The feed port is movably mounted within the feed hopper. A rotating rod is fixed to the lower left corner of the inner cylinder. The device uses a rolling screening method to screen the pyrotechnic powder. Combined with an internal spiral guide plate and sieve holes, the gunpowder can be screened during the rolling process. The rolling screening method produces relatively low noise.

[0004] The disadvantages of the existing technology are that: when the drum-type screening mechanism is screening, the feed port is fixed, the screening pressure of the screen in the feed port section is large, and clogging is likely to occur, which has certain deficiencies. Utility Model Content

[0005] The purpose of the utility model is to provide a fireworks and firecracker raw material screening device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fireworks and firecracker raw material screening device, comprising a fixed frame, a collecting drum is slidably connected to the fixed frame, a screening drum is rotatably connected to the collecting drum, a conveying auger is fixedly connected to the fixed frame, and the screening drum is slidably connected to the conveying auger; the fixed frame is also provided with a pushing component for pushing the screening drum to shake, the pushing component comprises two vertical rods rotatably connected to the fixed frame, both of the vertical rods are fixedly connected to a cam, and the screening drum is rotatably connected to a contact ring; a plurality of elastic telescopic rods are fixedly connected to the fixed frame, a plurality of the elastic telescopic rods are fixedly connected to the same abutting ring, a plurality of connecting rods are fixedly connected to the abutting ring, and a plurality of connecting rods are all slidably connected to the screening drum, and the elasticity of the elastic telescopic rods drives the contact ring to contact the cam.

[0007] As a further description of the above technical solution:

[0008] The fixed frame is also provided with a driving assembly for driving the screening drum to rotate, and the driving assembly includes a cross bar rotatably connected to the fixed frame, and a driving motor is fixedly connected to the cross bar; a long gear is provided on the cross bar, and a gear plate is fixedly connected to the outer surface of the screening drum, and the gear plate is engaged with the long gear.

[0009] As a further description of the above technical solution:

[0010] The cross bar is connected to the two vertical bars through a transmission unit, and the transmission unit includes a transmission rod rotatably connected to a fixed frame; a first bevel gear is fixedly connected to the transmission rod, and a second bevel gear is fixedly connected to the cross bar, and the first bevel gear is meshed with the second bevel gear. The transmission rod is connected to the two vertical bars through a first belt.

[0011] As a further description of the above technical solution:

[0012] The fixed frame is also fixedly connected with a lower hopper, and the lower hopper is communicated with the conveying auger.

[0013] As a further description of the above technical solution:

[0014] The cross bar is connected to the rotating shaft of the conveying auger through a second belt.

[0015] As a further description of the above technical solution:

[0016] A plurality of inclined baffles are fixedly connected in the screening cylinder.

[0017] In the above technical solution, the fireworks and firecrackers raw material screening device provided by the present invention has the following beneficial effects:

[0018] The utility model cooperates with each other by arranging a fixed frame, a collecting drum, a screening drum, a discharge hopper, a conveying auger and a pushing component, and drives the screening drum to shake through the pushing component, so that relative movement occurs between the screening drum and the discharge hopper, thereby changing the discharge position of the raw materials and avoiding excessive accumulation of materials. Moreover, through the shaking of the screening drum, the materials inside it can be driven to shake in a horizontal direction while moving in a circular motion, thereby effectively improving the screening effect of the screening drum on the fireworks and firecracker raw materials.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present utility model;

[0023] Figure 2 Another perspective view of the overall structure provided by the embodiment of the utility model;

[0024] Figure 3 A longitudinal sectional front view of the overall structure provided by an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of a partial structural decomposition provided in an embodiment of the present utility model;

[0026] Figure 5 This is a longitudinal sectional side view of the overall structure provided by an embodiment of the present utility model.

[0027] Description of reference numerals:

[0028] 1. Fixed frame; 2. Collecting cylinder; 3. Screening cylinder; 4. Conveying auger; 51. Vertical rod; 52. Cam; 53. Contact ring; 54. Elastic telescopic rod; 55. Abutment ring; 56. Connecting rod; 61. Cross bar; 62. Driving motor; 63. Long gear; 64. Gear plate; 71. Transmission rod; 72. First bevel gear; 73. Second bevel gear; 74. First belt; 8. Lower hopper; 9. Second belt; 10. Inclined baffle. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0030] See also Figure 1-5 The present embodiment provides a fireworks and firecracker raw material screening device, including a fixed frame 1, the fixed frame 1 is an existing supporting device, a collecting drum 2 is slidably connected to the fixed frame 1, the collecting drum 2 slides horizontally in the fixed frame 1 through a connecting piece, and a screening drum 3 is rotatably connected in the collecting drum 2, and the collecting drum 2 is wrapped around the outside of the screening drum 3 for guiding the raw materials screened by the screening drum 3 away, and a conveying auger 4 is fixedly connected to the fixed frame 1, and the screening drum 3 is slidably connected to the conveying auger 4. The conveying auger 4 is an existing material conveying equipment, and the conveying auger 4 passes through one end of the screening drum 3 horizontally, and a dynamic seal needs to be set between the two; a pushing component for pushing the screening drum 3 to shake is also provided on the fixed frame 1, and the pushing component includes two vertical rods 51 rotatably connected to the fixed frame 1, and the two vertical rods 51 are fixedly connected to a cam 52, A contact ring 53 is rotatably connected; a plurality of elastic telescopic rods 54 are fixedly connected to the fixed frame 1, and the plurality of elastic telescopic rods 54 are fixedly connected to the same abutment ring 55, and the abutment ring 55 is fixedly connected to a plurality of connecting rods 56, and the plurality of connecting rods 56 are all slidably connected to the screening drum 3, and the elasticity of the elastic telescopic rod 54 drives the contact ring 53 to contact the cam 52, and the cam 52 and the elastic telescopic rod 54 are respectively arranged on both sides of the screening drum 3. When the cam 52 is driven by the rotation of the vertical rod 51, one end of its long axis contacts the contact ring 53 on the screening drum 3, which can push it to move and squeeze the elastic telescopic rod 54, and when one end of its short axis contacts the screening drum 3, the restoring force of the compressed elastic telescopic rod 54 drives the screening drum 3 to move in the opposite direction and contact the cam 52 again. The screening drum 3 can open a discharge port according to the specific usage.

[0031] In the embodiment further provided by the present invention, a driving assembly for driving the screening drum 3 to rotate is also provided on the fixed frame 1, and the driving assembly includes a cross bar 61 rotatably connected to the fixed frame 1, and a driving motor 62 is fixedly connected to the cross bar 61; a long gear 63 is provided on the cross bar 61, and a gear plate 64 is fixedly connected to the outer surface of the screening drum 3, and the gear plate 64 is engaged with the long gear 63. The driving motor 62 is connected to an external power supply and a control switch. The driving motor 62 is fixed to the fixed frame 1 by a fixing member, and its driving shaft is fixedly connected to one end of the cross bar 61 extending to the outside of the fixed frame 1.

[0032] Furthermore, the cross bar 61 is connected to the two vertical bars 51 through a transmission unit, and the transmission unit includes a transmission rod 71 rotatably connected to the fixed frame 1; a first bevel gear 72 is fixedly connected to the transmission rod 71, and a second bevel gear 73 is fixedly connected to the cross bar 61, the first bevel gear 72 is meshed with the second bevel gear 73, and the transmission rod 71 is connected to the two vertical bars 51 through a first belt 74. The transmission rod 71 is arranged below the cross bar 61, and the rotation of the cross bar 61 drives the transmission rod 71 to rotate through the cooperation between the second bevel gear 73 and the first bevel gear 72. The two vertical bars 51 are respectively arranged on both sides of the transmission rod 71, and the two vertical bars 51 and the transmission rod 71 are provided with sprockets adapted to the first belt 74.

[0033] Furthermore, a lower hopper 8 is fixedly connected to the fixed frame 1, and the lower hopper 8 is connected to the conveying auger 4. The lower hopper 8 is connected to the feed port of the conveying auger 4. The fireworks and firecracker raw materials can be introduced into the conveying auger 4 through the lower hopper 8, and the fireworks and firecracker raw materials can be introduced into the screening drum 3 for screening through the operation of the conveying auger 4.

[0034] In the embodiment further provided by the present invention, the cross bar 61 is connected to the rotating shaft of the conveying auger 4 through the second belt 9, and the cross bar 61 and the rotating shaft of the conveying auger 4 are both provided with sprockets adapted to the second belt 9, so that the driving motor 62 can drive the cross bar 61 to rotate while driving the conveying auger 4 to work synchronously.

[0035] In the embodiment provided by the present invention, a plurality of inclined baffles 10 are fixedly connected to the screening drum 3. The plurality of inclined baffles 10 are distributed on the inner wall of the screening drum 3 in a circular array with the conveying auger 4 as the center, and are used to block the material so that part of the intercepted material moves to the side wall for shaking screening as the screening drum 3 rotates, thereby reducing the gravity at the bottom of the screening drum 3 and avoiding excessive accumulation at the bottom that affects the screening effect.

[0036] Working principle: When working, start the drive motor 62, and the drive motor 62 drives the cross bar 61 to rotate. The rotation of the cross bar 61 drives the conveying auger 4 through the second belt 9, and the rotation of the cross bar 61 will also drive the long gear 63 fixed on its surface to rotate. The long gear 63 rotates and engages with the gear plate 64 on the screening drum 3, thereby driving the screening drum 3 to rotate, and the rotation of the cross bar 61 drives the second bevel gear 73 set thereon to rotate. The second bevel gear 73 rotates and engages with the first bevel gear 72, thereby driving the transmission rod 71 to rotate synchronously. The rotation of the transmission rod 71 drives the vertical rods 51 on both sides to rotate through the first belt 74. The vertical rod 51 drives the cam 52 to rotate and cooperates with the elastic telescopic rod 54 to drive the screening drum 3 to swing back and forth. At this time, the fireworks and firecracker raw materials are introduced into the conveying auger 4 through the feed hopper and transported to the screening drum 3 through the conveying auger 4. With the screening drum 3 moving back and forth, the fireworks and firecracker raw materials can be introduced into different positions of the screening drum 3 for screening.

[0037] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fireworks and firecrackers raw material screening device, comprising a fixing frame (1), characterized in that: A collecting drum (2) is slidably connected to the fixed frame (1), a screening drum (3) is rotatably connected to the collecting drum (2), a conveying auger (4) is fixedly connected to the fixed frame (1), and the screening drum (3) is slidably connected to the conveying auger (4); The fixed frame (1) is also provided with a pushing assembly for pushing the screening drum (3) to shake, the pushing assembly comprising two vertical rods (51) rotatably connected to the fixed frame (1), a cam (52) being fixedly connected to both vertical rods (51), and a contact ring (53) being rotatably connected to the screening drum (3); A plurality of elastic telescopic rods (54) are fixedly connected to the fixed frame (1), a same abutting ring (55) is fixedly connected to the plurality of elastic telescopic rods (54), a plurality of connecting rods (56) are fixedly connected to the abutting ring (55), and the plurality of connecting rods (56) are all slidably connected to the screening drum (3). The elasticity of the elastic telescopic rods (54) drives the contact ring (53) to contact the cam (52).

2. The fireworks and firecrackers raw material screening device according to claim 1, characterized in that: The fixed frame (1) is also provided with a driving assembly for driving the screening drum (3) to rotate, the driving assembly comprising a crossbar (61) rotatably connected to the fixed frame (1), and a driving motor (62) fixedly connected to the crossbar (61); A long gear (63) is provided on the crossbar (61), and a gear plate (64) is fixedly connected to the outer surface of the screening cylinder (3), and the gear plate (64) is meshed with the long gear (63).

3. The fireworks and firecrackers raw material screening device according to claim 2, characterized in that: The transverse rod (61) is connected to the two vertical rods (51) via a transmission unit, and the transmission unit includes a transmission rod (71) rotatably connected to the fixed frame (1); The transmission rod (71) is fixedly connected to a first bevel gear (72), the cross bar (61) is fixedly connected to a second bevel gear (73), the first bevel gear (72) is meshed with the second bevel gear (73), and the transmission rod (71) is transmission-connected to the two vertical rods (51) via a first belt (74).

4. The fireworks and firecrackers raw material screening device according to claim 1, characterized in that: A lower hopper (8) is also fixedly connected to the fixed frame (1), and the lower hopper (8) is communicated with the conveying auger (4).

5. The fireworks and firecrackers raw material screening device according to claim 2, characterized in that: The crossbar (61) is connected to the rotating shaft of the conveying auger (4) through a second belt (9).

6. The fireworks and firecrackers raw material screening device according to claim 1, characterized in that: A plurality of inclined baffles (10) are fixedly connected to the screening drum (3).

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