Screening device for ethylene homopolymer raw materials

Abstract

The utility model relates to the field of ethylene homopolymers, in particular to an ethylene homopolymer raw material screening device which comprises a box body and a feeding pipe opening connected to the top of the box body, a multi-stage type screening assembly is installed on the inner side of the box body, and a vibration motor is installed on the outer side of the box body. The multi-stage screening assembly comprises a coarse screen, a fine screen and a material receiving shell which are sequentially installed from top to bottom, the coarse screen and the fine screen are obliquely arranged, the lower ends of the coarse screen and the fine screen are located on the same side, and the feeding pipe opening is formed in the higher ends of the coarse screen and the fine screen. After raw materials are conveyed into the box body through the feeding pipe opening, the driving piece drives the rotating rod to rotate, the two spiral blades on the surface of the rotating rod rotate oppositely, and therefore the raw materials on the coarse screen mesh or the fine screen mesh are dispersed, are in a tiled state and are evenly screened in a flowing mode through the receding gaps. And the raw materials are fully distributed on the surfaces of the corresponding coarse screens or the fine screens, so that the screening efficiency of the raw materials is improved.

Description

Technical Field

[0001] The utility model relates to the field of ethylene homopolymers, in particular to a screening device for ethylene homopolymer raw materials. Background Art

[0002] Ethylene homopolymer, also known as polyethylene, is a thermoplastic resin obtained by polymerization of ethylene monomers. In industry, it also includes copolymers of ethylene and a small amount of a-olefins. It is odorless, non-toxic, feels like wax, has excellent low-temperature resistance (the lowest operating temperature can reach -100 to -70°C), and has good chemical stability. Because the polymer molecules are connected by carbon-carbon single bonds, it can withstand the corrosion of most acids and alkalis (not resistant to oxidizing acids), is insoluble in general solvents at room temperature, has low water absorption, and has excellent electrical insulation. It is used in a wide range of manufacturing industries.

[0003] Among them, the announcement number is CN218429357U, which is a polyethylene halogen-free flame retardant masterbatch granulation and screening device, belonging to the field of halogen-free flame retardant masterbatch granulation and screening technology. It includes granulation equipment and a filter box. One side of the filter box is connected to a coarse material outlet pipe, and the coarse material outlet pipe is arranged in an inclined shape. The side of the filter box away from the coarse material outlet pipe is connected to a fine material outlet pipe, and the fine material outlet pipe is arranged in an inclined shape. The bottom end of the granulation equipment is connected to a discharge pipe, and a coarse material filter plate is fixedly connected to the inside of the filter box, and the coarse material filter plate is arranged in an inclined shape.

[0004] The above-mentioned prior art has the following defects: after the top granulation equipment transfers the raw materials into the filter box, the material falling area is limited and will be concentrated in the central position of the coarse material filter plate, which will not only clog and accumulate at the feed port, but the raw materials will mostly flow along the central area of ​​the screen plate surface during the movement along the inclined angle of the screen plate, and the overall surface of the screen plate cannot be fully utilized, thereby affecting its screening efficiency. Utility Model Content

[0005] The utility model mainly solves the technical problem of providing a screening device for ethylene homopolymer raw materials, which prevents the feed port from being blocked and piled up with raw materials, fully utilizes the surface of the entire sieve plate, and improves the screening efficiency.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a screening device for ethylene homopolymer raw materials, comprising: a box body and a feed pipe port connected to the top thereof, a multi-stage screening assembly is installed on the inner side of the box body, a vibration motor is installed on the outer side of the box body, the multi-stage screening assembly comprises a coarse screen, a fine screen and a material receiving shell installed in sequence from top to bottom, the coarse screen and the fine screen are respectively arranged obliquely and the lower ends of the two are on the same side, the feed pipe port is arranged at the higher end of the coarse screen, and a discharge notch is opened at the bottom of the box body;

[0007] The box body is provided with a discharge port 1 at one end close to the lower side of the coarse screen, and a material receiving mechanism 1 is provided at the side of the discharge port 1 away from the box body; the box body is provided with a discharge port 2 at one end close to the lower side of the fine screen, and a material receiving mechanism 2 is provided at the side of the discharge port 2 away from the box body;

[0008] A material leveling member is installed above the higher end of the coarse screen and the fine screen respectively, and a driving member for driving the material leveling member to rotate is installed on one side of the box body;

[0009] The material leveling member comprises a rotating rod, on the outer circle of which two spiral blades are symmetrically mounted, and the bottom ends of the outermost circles of the spiral blades respectively form clearances with the lower ends of the coarse screen and the fine screen.

[0010] By adopting the above technical solution, after the feed pipe mouth transmits the raw materials into the box, the driving part drives the rotating rod to rotate, so that the two spiral blades on its surface rotate in opposite directions, thereby dispersing the raw materials on the coarse screen, making them flat, and evenly flowing and screening along the surface of the coarse screen from the gap, thereby improving the screening efficiency of the raw materials. Subsequently, the coarse screen and the fine screen screen the raw materials in turn, and the raw materials of different particle sizes are screened.

[0011] In a preferred example, the utility model can be further configured as follows: a material guide plate is obliquely installed at the lower end of the coarse screen, the lower end of the material guide plate is arranged close to the higher end of the fine screen and is located above the material leveling piece, and two reinforcing ribs are symmetrically installed on the top of the material guide plate, and the tops of the reinforcing ribs are respectively connected to the bottom of the coarse screen.

[0012] By adopting the above technical solution, the guide plate transfers the raw materials screened by the coarse screen to the higher end of the fine screen, so as to extend the flow distance of the raw materials and fully screen the raw materials.

[0013] In a preferred example, the utility model can be further configured as follows: the driving member includes two pulleys and a U-shaped mounting seat, one end of the pulleys is respectively connected to the rotating rod, the pulleys are connected by belts, a driving motor is connected to the U-shaped mounting seat, and the output shaft of the driving motor is connected to one of the pulleys.

[0014] By adopting the above technical solution, the driving motor drives one of the pulleys to rotate, and the pulley is transmitted through the belt, synchronously driving the corresponding rotating rod to rotate, so that the two spiral blades on the surface of the corresponding rotating rod rotate in opposite directions, and the fed raw materials are dispersed and spread out, so that they can be fully screened along the surface of the multi-stage screening component.

[0015] In a preferred example, the utility model can be further configured as follows: the material receiving mechanism includes a U-shaped material receiving plate connected to the bottom end of a discharge port away from the coarse screen, the U-shaped material receiving plate is tilted, and a material receiving trolley is provided at the lower end of the U-shaped material receiving plate.

[0016] By adopting the above technical solution, the coarse screen screens the unqualified raw materials to the discharge port 1, and transmits them along the U-shaped receiving plate 1 to the receiving trolley 1 for recycling. The screened raw materials fall onto the surface of the fine screen for secondary screening.

[0017] In a preferred example, the utility model can be further configured as follows: the second material receiving mechanism includes a second U-shaped material receiving plate connected to the bottom end of the second discharge port away from the fine screen, the second U-shaped material receiving plate is tilted, and a second material receiving trolley is provided at the lower end of the second U-shaped material receiving plate.

[0018] By adopting the above technical solution, the coarse screen allows the screened raw materials to fall onto the surface of the fine screen for secondary screening. The fine screen again screens the unqualified raw materials to the second discharge port, and transmits them along the U-shaped receiving plate two to the second receiving trolley for recycling.

[0019] In a preferred example, the utility model can be further configured as follows: the inner cavities of the U-shaped material receiving plate 1 and the U-shaped material receiving plate 2 are both formed with V-shaped flow grooves.

[0020] By adopting the above technical solution, the unqualified raw materials screened out flow along the V-shaped flow groove and slide into the corresponding material receiving trolley one or material receiving trolley two for subsequent recycling and reprocessing.

[0021] In summary, the present invention includes at least one of the following beneficial technical effects of the screening device for ethylene homopolymer raw materials:

[0022] 1. After the feed pipe transfers the raw materials into the box, the driving part drives the rotating rod to rotate, so that the two spiral blades on its surface rotate in opposite directions, thereby dispersing the raw materials on the coarse screen or fine screen, making them flat, and evenly screening them from the gap, so that the raw materials are fully distributed on the surface of the corresponding coarse screen or fine screen to improve the screening efficiency of the raw materials.

[0023] 2. The coarse screen and fine screen cooperate with the vibration motor to screen the raw materials in turn, and the raw materials of different particle sizes are screened. At the same time, the guide plate transfers the raw materials screened by the coarse screen to the higher end of the fine screen to extend the flow distance of the raw materials and fully screen the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0027] Figure 3 This is a structural schematic diagram of a U-shaped material receiving plate of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the U-shaped material connection plate 2 of the utility model.

[0029] In the figure: 1, box body; 2, feed pipe; 30, multi-stage screening component; 4, vibration motor; 5, discharge port 1; 60, receiving mechanism 1; 7, discharge port 2; 80, receiving mechanism 2;

[0030] 31. Coarse screen; 32. Fine screen; 33. Material receiving shell; 34. Material leveling member; 35. Driving member; 36. Material guide plate; 37. Reinforcing ribs;

[0031] 61. One U-shaped receiving plate; 62. One receiving trolley;

[0032] 81. U-shaped receiving plate 2; 82. Receiver trolley 2;

[0033] 341, rotating rod; 342, spiral blade;

[0034] 351. Pulley; 352. U-shaped mounting seat; 353. Driving motor. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] Reference Figure 1-4, is a screening device for ethylene homopolymer raw materials disclosed in the utility model, comprising: a box body 1 and a feed pipe opening 2 connected to the top thereof, a multi-stage screening assembly 30 is installed on the inner side of the box body 1, a vibration motor 4 is installed on the outer side of the box body 1, the multi-stage screening assembly 30 comprises a coarse screen 31, a fine screen 32 and a material receiving shell 33 which are installed in sequence from top to bottom, the coarse screen 31 and the fine screen 32 are respectively arranged obliquely and the lower ends of the two are on the same side, the feed pipe opening 2 is arranged on the higher end of the coarse screen 31, A discharge notch 9 is provided at the bottom of the box body 1, a guide plate 36 is obliquely installed at the lower end of the coarse screen 31, the lower end of the guide plate 36 is arranged close to the higher end of the fine screen 32 and is located above the material leveling member 34, two reinforcing ribs 37 are symmetrically installed on the top of the guide plate 36, the tops of the reinforcing ribs 37 are respectively connected to the bottom of the coarse screen 31, a discharge port 5 is provided at the lower end of the box body 1 close to the coarse screen 31, and a material receiving mechanism 60 is provided on the side of the discharge port 5 away from the box body 1, and the box 1 close to the fine screen 32 is provided with a material receiving mechanism 60. A discharge port 27 is provided at the lower end of the screen 32, and a material receiving mechanism 280 is provided at the side of the discharge port 27 away from the box 1. A material leveling member 34 is respectively installed above the higher end of the coarse screen 31 and the fine screen 32, and a driving member 35 for driving the material leveling member 34 to rotate is installed on one side of the box 1. The material leveling member 34 includes a rotating rod 341, and two spiral blades 342 are symmetrically installed on the outer circle of the rotating rod 341. The bottom ends of the outermost circles of the spiral blades 342 form a rotation with the lower ends of the coarse screen 31 and the fine screen 32, respectively. There is a clearance; the clearance is preferably 4mm-12mm, and the vibration motor 4 is installed between the coarse screen 31 and the fine screen 32. When the feed pipe 2 transfers the raw material to the box body 1, the driving member 35 drives the rotating rod 341 to rotate, so that the two spiral blades 342 on the surface rotate in opposite directions, thereby dispersing the raw materials on the coarse screen 31 or the fine screen 32 to make it flat, and evenly flow and screen from the clearance, so that the raw materials are fully distributed on the surface of the corresponding coarse screen 31 or the fine screen 32.

[0038] The driving member 35 includes two pulleys 351 and a U-shaped mounting seat 352, one end of the pulleys 351 is connected to the rotating rod 341 respectively, and the pulleys 351 are connected by belts. A driving motor 353 is connected to the U-shaped mounting seat 352, and the output shaft of the driving motor 353 is connected to one of the pulleys 351; there are no less than two trapezoidal wheel grooves on the pulleys 351, and corresponding matching belts are installed. At the same time, the driving motor 353 is preferably a servo motor. When the driving motor 353 drives one of the pulleys 351 to rotate, the pulley 351 drives the corresponding rotating rod 341 to rotate, and at the same time drives the other pulley 351 to rotate through the belt, so that the two spiral blades 342 on the surface of the corresponding rotating rod 341 rotate in the opposite direction, the fed raw materials are dispersed and spread, and dispersed on the corresponding coarse screen 31 and fine screen 32 surfaces for screening operations.

[0039] The material receiving mechanism 1 60 includes a U-shaped material receiving plate 1 61 connected to the bottom end of the side of the discharge port 1 5 away from the coarse screen 31, the U-shaped material receiving plate 1 61 is tilted, and a material receiving trolley 1 62 is provided at the lower end of the U-shaped material receiving plate 1 61. The material receiving mechanism 2 80 includes a U-shaped material receiving plate 2 81 connected to the bottom end of the side of the discharge port 2 7 away from the fine screen 32, the U-shaped material receiving plate 2 81 is tilted, and a material receiving trolley 2 82 is provided at the lower end of the U-shaped material receiving plate 2 81. The inner cavities of the U-shaped receiving plate 61 and the U-shaped receiving plate 81 are both formed with V-shaped flow grooves; the coarse screen 31 screens the unqualified raw materials to the discharge port 5, and transmits them along the U-shaped receiving plate 61 to the receiving trolley 62 for recycling, and the screened raw materials fall onto the surface of the fine screen 32 for secondary screening, and the fine screen 32 again screens the unqualified raw materials to the discharge port 7, and transmits them along the U-shaped receiving plate 81 to the receiving trolley 82 for recycling.

[0040] The implementation principle of this embodiment is as follows: when in use, the raw materials to be processed are transmitted to the box body 1 along the feed pipe mouth 2, and then the driving motor 353 drives one of the pulleys 351 to rotate, and the pulley 351 drives the corresponding rotating rod 341 to rotate, and at the same time drives another pulley 351 to rotate through the belt, so that the two spiral blades 342 on the surface of the corresponding rotating rod 341 rotate in the opposite direction, and the fed raw materials are dispersed and spread, first evenly dispersed on the surface of the coarse screen 31, and at the same time cooperate with the vibration motor 4 to improve Screening efficiency: qualified raw materials fall along the sieve holes of the coarse screen 31 onto the guide plate 36. The guide plate 36 transfers the selected raw materials to the higher end of the fine screen 32 to extend the flow length of the raw materials, and disperses the transferred materials with the cooperation of the corresponding pulley 351 to make them evenly dispersed on the surface of the fine screen 32. Then, qualified raw materials are screened into the material receiving shell 33, and unqualified raw materials are screened to the discharge port 1 5 or the discharge port 2 7, and are concentrated in the corresponding material receiving trolley 1 62 or the material receiving trolley 2 82 for recycling.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A screening device for ethylene homopolymer raw materials, comprising: A box (1) and a feed pipe opening (2) connected to the top thereof, characterized in that a multi-stage screening assembly (30) is installed on the inner side of the box (1), a vibration motor (4) is installed on the outer side of the box (1), the multi-stage screening assembly (30) comprises a coarse screen (31), a fine screen (32) and a material receiving shell (33) which are installed in sequence from top to bottom, the coarse screen (31) and the fine screen (32) are respectively arranged obliquely and their lower ends are on the same side, the feed pipe opening (2) is arranged at the higher end of the coarse screen (31), and a discharge notch (9) is opened at the bottom of the box (1); A discharge port (5) is provided at the lower end of the box body (1) close to the coarse screen (31), and a material receiving mechanism (60) is provided at the side of the discharge port (5) away from the box body (1); a discharge port (7) is provided at the lower end of the box body (1) close to the fine screen (32), and a material receiving mechanism (80) is provided at the side of the discharge port (7) away from the box body (1); A material leveling member (34) is installed above the higher end of the coarse screen (31) and the fine screen (32), respectively, and a driving member (35) for driving the material leveling member (34) to rotate is installed on one side of the box body (1); The material leveling member (34) comprises a rotating rod (341), on the outer circle of which two spiral blades (342) are symmetrically mounted, and the bottom ends of the outermost circles of the spiral blades (342) respectively form clearances with the lower ends of the coarse screen (31) and the fine screen (32).

2. The screening device for ethylene homopolymer raw materials according to claim 1, characterized in that: A material guide plate (36) is obliquely mounted at the lower end of the coarse screen (31); the lower end of the material guide plate (36) is arranged close to the higher end of the fine screen (32) and is located above the material leveling member (34); two reinforcing ribs (37) are symmetrically mounted on the top of the material guide plate (36); the tops of the reinforcing ribs (37) are respectively connected to the bottom of the coarse screen (31).

3. The screening device for ethylene homopolymer raw materials according to claim 1, characterized in that: The driving member (35) comprises two pulleys (351) and a U-shaped mounting seat (352), one end of each pulley (351) is connected to a rotating rod (341), the pulleys (351) are connected to each other via a belt, a driving motor (353) is connected to the U-shaped mounting seat (352), and an output shaft of the driving motor (353) is connected to one of the pulleys (351).

4. The screening device for ethylene homopolymer raw materials according to claim 1, characterized in that: The material receiving mechanism (60) comprises a U-shaped material receiving plate (61) connected to the bottom end of the discharge port (5) away from the coarse screen (31), the U-shaped material receiving plate (61) being arranged obliquely, and a material receiving trolley (62) being arranged at the lower end of the U-shaped material receiving plate (61).

5. The screening device for ethylene homopolymer raw material according to claim 4, characterized in that: The second material receiving mechanism (80) comprises a second U-shaped material receiving plate (81) connected to the bottom end of the second material outlet (7) away from the fine screen (32), the second U-shaped material receiving plate (81) being arranged obliquely, and a second material receiving trolley (82) being arranged at the lower end of the second U-shaped material receiving plate (81).

6. The screening device for ethylene homopolymer raw materials according to claim 5, characterized in that: The inner cavities of the U-shaped material receiving plate 1 (61) and the U-shaped material receiving plate 2 (81) are both formed with V-shaped flow grooves.

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