Vibrating screen device for screening polyolefin powder

Abstract

The utility model discloses a vibrating screen device for screening polyolefin powder, which comprises a hopper, the hopper comprises a feed port, a conical splitter plate is mounted in the hopper, the conical splitter plate is positioned right below the feed port, the conical splitter plate is in bilateral symmetry, and the feed port is communicated with the feed port. The projection of the conical splitter plate on the horizontal plane can cover the projection of the feeding port on the horizontal plane, a plurality of fourth through holes are evenly formed in the conical splitter plate, the opening directions of the fourth through holes are all the vertical direction, and the gap between every two adjacent fourth through holes is smaller than two times of the hole diameter of each fourth through hole. The lower end of the conical splitter plate is fixedly connected with a pair of auxiliary splitter plates, and the pair of auxiliary splitter plates are in bilateral symmetry relative to the center of the conical splitter plate. Compared with the prior art, direct impact of materials on the screen mesh can be buffered, the service life of the screen mesh can be prolonged, the materials can be evenly distributed on the screen mesh, and the problems that the materials are accumulated and caked, the screening efficiency is low, and the product yield is affected are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyolefin production, and particularly relates to a vibrating screen device for screening polyolefin powder materials. Background Art

[0002] A vibrating screen is a device that screens materials using vibration force. Generally, it includes a hopper and is widely used in industries such as food, medicine, chemical industry, metallurgy, abrasives, ceramics, coatings, etc. In the preparation process of ultra-high molecular weight polyethylene, the polyethylene obtained from the polymerization reaction is dried to obtain powder materials. After purification treatment, the powder materials are transported to the vibrating screen, and the vibrating screen is used to screen the powder materials to select particles with a particle size meeting the requirements, and the qualified particles are sent to the finished product bin for storage.

[0003] In the existing vibrating screen device, the material enters the hopper and directly falls onto the vibrating screen mesh for screening. On the one hand, the material with a certain pressure will directly impact the screen mesh, causing the screen mesh to collapse. In the long run, this will shorten the service life of the screen mesh. On the other hand, the falling material will accumulate concentratedly in the central area of the screen mesh, and the material is prone to caking, which not only reduces the dispersion efficiency but also affects the product yield. Therefore, it is necessary to improve the existing vibrating screen device to solve this technical problem.

[0004] Some improved vibrating screens are disclosed in the prior art. For example, Patent CN208679728U discloses a vibrating screen with uniform feeding. By setting a feeding hopper and a coarse screen mesh on the vibrating screen and using a material distribution pipe to achieve dispersed feeding, the effects of uniform feeding, effective protection of the screen mesh, and uniform screening are achieved. Although this vibrating screen realizes uniform feeding and effective protection of the screen mesh by setting a feeding hopper and a coarse screen mesh, when processing materials with specific particle sizes or shapes, the feeding may still not be uniform enough, resulting in unsatisfactory screening effects.

[0005] Patent CN110479572B discloses a vibrating screen. By setting a slightly swayable conical block and a feeding pipe in the middle of the first screen mesh, after the screening material falls onto the irregular conical surface of the conical block, the momentum direction of the screening material is changed, and the screening material does not directly contact the first screen mesh at a right angle. Coupled with the buffering effect of the conical block, the momentum of the screening material in the vertical direction borne by the first screen mesh is greatly reduced, making the screen mesh not easy to dent, ensuring the normal use of the screen mesh, and improving the screening efficiency. The design of the conical block can make the screening material more evenly distributed on the first screen mesh compared with the existing equipment, but there are still problems of uneven or unstable vibration transmission.

[0006] Patent CN215797173U discloses a vibration sieve uniform feeding device. By setting a buffer shunt box, hoppers are symmetrically installed on the left and right of the lower half of the buffer shunt box. The lower end of the hopper is provided with a discharge port, and a conical material flow plate is arranged above the discharge port. The conical material flow plate is an inclined plane with a horizontal inclination angle of 40 - 45°. The conical material flow plate can make the material flow smoothly and further evenly shunt the material entering the buffer shunt box. However, when the device processes high-flow materials, there are problems of unstable feeding speed leading to material blockage or accumulation, which affects the screening efficiency.

[0007] Existing vibration sieve devices cannot be well applied to screen polyolefin powder or particles (such as ultra-high molecular weight polyethylene particles) with a particle size less than 500 microns. There are problems of excessive concentration and accumulation during the screening and falling process of the particles or powder. Therefore, the vibration sieve device still needs to be improved. Summary of the Utility Model

[0008] The purpose of the present utility model is to provide a vibration sieve device for screening polyolefin powder to solve the above problems.

[0009] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the present utility model is as follows:

[0010] A vibration sieve device for screening polyolefin powder includes a hopper. The hopper includes a feed inlet. A conical shunt plate is installed inside the hopper. The conical shunt plate is directly below the feed inlet. The conical shunt plate is symmetric left and right. The projection of the conical shunt plate on the horizontal plane can cover the projection of the feed inlet on the horizontal plane. A plurality of fourth through holes are evenly opened on the conical shunt plate. The opening directions of the plurality of fourth through holes are all in the vertical direction. The gap between adjacent two of the fourth through holes is less than twice the aperture of the fourth through hole.

[0011] In one or more embodiments of the present utility model, a pair of sub-shunt plates are fixedly connected to the lower end of the conical shunt plate. The pair of sub-shunt plates are symmetric left and right with respect to the center of the conical shunt plate.

[0012] In one or more embodiments of the present utility model, a plurality of fifth through holes are evenly opened on the sub-shunt plate. The opening direction of the fifth through hole is in the vertical direction. The gap between adjacent two of the fifth through holes is less than twice the aperture of the fifth through hole.

[0013] In one or more embodiments of the present utility model, the central axis of the fifth through hole does not coincide with the central axis of the fourth through hole.

[0014] In one or more embodiments of the present utility model, a protective plate is fixedly connected to the upper end of the conical shunt plate.

[0015] In one or more embodiments of the present utility model, a plurality of third through holes are formed in the upper end of the conical flow dividing plate, and a plurality of connecting columns adapted to the third through holes are fixedly connected to the lower end of the protection plate, and the connecting columns are inserted into the third through holes.

[0016] In one or more embodiments of the present utility model, the conical flow dividing plate is fixedly connected with a sleeve, a connecting shaft is arranged on the hopper, and the sleeve is sleeved on the connecting shaft.

[0017] In one or more embodiments of the present utility model, a plurality of limiting blocks are arranged on the inner surface of the sleeve, a plurality of limiting grooves adapted to the limiting blocks are formed on the connecting shaft, and the limiting blocks are inserted into the limiting grooves.

[0018] In one or more embodiments of the present utility model, the hopper is provided with a first through hole and a second through hole, sliding rings are installed in both the first through hole and the second through hole, and both ends of the connecting shaft penetrate through the sliding rings and are located outside the hopper.

[0019] In one or more embodiments of the present utility model, a handle is fixedly connected to one end of the connecting shaft, and a nut is threadedly connected to the other end of the connecting shaft.

[0020] Compared with the prior art, the present utility model can not only buffer the direct impact of granular powder materials on the screen, facilitate the extension of the service life of the screen, but also evenly distribute the materials on the screen, effectively solving the problems of material accumulation and caking, low screening efficiency, and affected product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a first partial sectional view of a vibrating screen in an embodiment of the present utility model;

[0023] Figure 2 It is a second partial sectional view of a vibrating screen in an embodiment of the present utility model;

[0024] Figure 3 It is a first partial structural schematic diagram of a vibrating screen in an embodiment of the present utility model;

[0025] Figure 4 It is a second partial structural schematic diagram of a vibrating screen in an embodiment of the present utility model;

[0026] Figure 5 This is a sectional view of the flow splitting component in an embodiment of the present utility model;

[0027] Figure 6 This is a schematic structural view of the flow splitting component in an embodiment of the present utility model.

[0028] Main reference numerals description:

[0029] 1 - hopper, 101 - first through hole, 102 - second through hole, 2 - conical flow splitting plate, 201 - third through hole, 202 - fourth through hole, 3 - auxiliary flow splitting plate, 301 - fifth through hole, 4 - sleeve, 401 - limiting block, 5 - protection plate, 501 - connecting column, 6 - connecting shaft, 601 - limiting groove, 7 - sliding ring, 8 - handle, 9 - nut. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer Figures 1 to 4 As shown, a vibrating screen device for screening polyolefin powder includes a hopper 1, which is provided with a first through hole 101 and a second through hole 102. A connecting shaft 6 is arranged on the hopper 1. Sliding rings 7 are installed in both the first through hole 101 and the second through hole 102. Both ends of the connecting shaft 6 penetrate through the sliding rings 7 and are located outside the hopper 1. Specifically, the sliding ring 7 is a sliding bearing, which includes an inner ring and an outer ring. The inner ring is fixedly connected to the connecting shaft 6, and the outer ring is fixedly connected to the hopper 1. Thus, during the working process of the vibrating screen, the friction between the connecting shaft 6 and the hopper 1 can be reduced to a certain extent, the wear of the connecting shaft 6 can be reduced, and its service life can be increased.

[0032] A sleeve 4 is sleeved on the connecting shaft 6. A plurality of limiting blocks 401 are welded on the inner surface of the sleeve 4. A plurality of limiting grooves 601 matching the limiting blocks 401 are provided on the connecting shaft 6. The limiting grooves 601 can be directly inserted into the limiting blocks 401, thereby realizing the limiting installation of the sleeve 4. To a great extent, the sleeve 4 can be prevented from rotating on the connecting shaft 6, ensuring the stability of the sleeve 4 during the working process of the vibrating screen.

[0033] Refer Figures 2 to 3As shown, in order to facilitate the taking and installation of the connecting shaft 6, a handle 8 is welded to one end of the connecting shaft 6. A nut 9 is threadedly connected to the other end of the connecting shaft 6, thus realizing the stable fixation of the connecting shaft 6 on the hopper 1. Under normal circumstances, the handle 8 is flush with the horizontal plane. When the handle 8 is not flush with the horizontal plane, it can be known that the connecting shaft 6 has rotated to a certain extent, and the nut 9 can be removed to adjust the connecting shaft 6.

[0034] Refer to Figure 5 As shown, the shunt assembly includes a conical shunt plate, a secondary shunt plate, a sleeve, and a protective plate. The sleeve 4 is welded to the conical shunt plate 2, thus completing the installation of the conical shunt plate 2 on the hopper 1 and enabling the combined use of the conical shunt plate 2 and the hopper 1.

[0035] Refer to Figure 1 As shown, the hopper 1 includes a feed inlet. The conical shunt plate 2 is located directly below the feed inlet. The conical shunt plate 2 is symmetrical left and right, and the projection of the conical shunt plate 2 on the horizontal plane can cover the projection of the feed inlet on the horizontal plane, thereby ensuring that the material can fall on the conical shunt plate 2 and slide to both sides of the conical shunt plate 2 during the operation of the vibrating screen, which can buffer the direct impact of the material on the screen to a certain extent, extend the service life of the screen, and evenly distribute the material on the screen.

[0036] Refer to Figure 1 As shown, in order to ensure that the material can also be distributed directly below the conical shunt plate 2 to make the material distribution on the screen more even, a plurality of fourth through holes 202 are evenly formed in the conical shunt plate 2, and the opening directions of the plurality of fourth through holes 202 are all in the vertical direction. In order to make the material sliding to both sides of the conical shunt plate 2 and the material falling through the fourth through holes 202 more equal, the gap between two adjacent fourth through holes 202 is less than twice the diameter of the fourth through hole 202.

[0037] Refer to Figure 6 As shown, a protective plate 5 is fixedly connected to the upper end of the conical shunt plate 2, thus preventing the upper end of the conical shunt plate 2 from being worn by the impact of the material and enhancing the durability of the conical shunt plate 2. In order to facilitate the replacement of the protective plate 5, a plurality of third through holes 201 are formed in the upper end of the conical shunt plate 2, and a plurality of connecting columns 501 matching the third through holes 201 are welded to the lower end of the protective plate 5, and the connecting columns 501 are inserted into the third through holes 201. Specifically, the conical shunt plate 2 is made of steel material, and a magnet sheet is embedded in the protective plate 5, and the protective plate 5 can be stably adsorbed on the conical shunt plate 2, so that the protective plate 5 will not fall off during the operation of the vibrating screen. In addition, the connecting column 501 can be made of rubber material, which can reduce the kinetic energy conduction of the falling material to the conical shunt plate 2 to a certain extent, enhance the protection of the upper end of the conical shunt plate 2, and enhance the durability of the conical shunt plate 2.

[0038] Refer to Figure 5, Figure 6 As shown in the figure, a pair of auxiliary diverter plates 3 are welded to the lower end of the conical diverter plate 2. The pair of auxiliary diverter plates 3 are symmetric about the center of the conical diverter plate 2. A plurality of fifth through holes 301 are evenly formed in the auxiliary diverter plates 3, and the opening direction of the fifth through holes 301 is the vertical direction, so that the materials falling through the plurality of fourth through holes 202 can be more evenly distributed on the sieve net directly below the conical diverter plate 2. The gap between two adjacent fifth through holes 301 is less than twice the diameter of the fifth through holes 301, so that the materials sliding toward the center side of the conical diverter plate 2 on the auxiliary diverter plates 3 are relatively equal to the materials falling through the fifth through holes 301, and the materials can be more evenly distributed on the sieve net directly below the conical diverter plate 2.

[0039] Refer Figure 5 As shown in the figure, the central axis 302 of the fifth through hole 301 does not coincide with the central axis 203 of the fourth through hole 202. With the above structure, generally, it can be ensured that the materials from the feed inlet can be quite evenly distributed on the sieve net, which is convenient for effectively solving the problems of material accumulation and caking, low screening efficiency, and affected product yield. On the other hand, it can also buffer the direct impact of the materials on the sieve net, which is convenient for extending the service life of the sieve net.

[0040] During specific use, refer Figure 1 , Figure 4 As shown in the figure, the materials enter through the feed inlet of the hopper 1 and fall onto the protective plate 5 and then slide to both sides of the conical diverter plate 2. A part of the materials fall onto the sieve net along the upper surface of the conical diverter plate 2, and another part fall onto the upper surface of the auxiliary diverter plates 3 through the plurality of third through holes 201. Similarly, some of them fall onto the sieve net along the upper surface of the auxiliary diverter plates 3, and others fall onto the sieve net through the fifth through holes 301.

[0041] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0042] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. The narrative way of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibrating screen device for screening polyolefin powder, comprising a hopper, characterized in that: The hopper includes a feed port, and a conical diverter plate is installed inside the hopper. The conical diverter plate is located directly below the feed port, and the conical diverter plate is symmetrical on the left and right. The projection of the conical diverter plate on the horizontal plane can cover the projection of the feed port on the horizontal plane. A plurality of fourth through holes are evenly opened on the conical diverter plate, and the opening directions of the plurality of fourth through holes are all vertical, and the gap between two adjacent fourth through holes is less than twice the aperture of the fourth through hole.

2. A vibrating screen device for screening polyolefin powder according to claim 1, characterized in that: A pair of auxiliary diverter plates are fixedly connected to the lower end of the conical diverter plate, and the pair of auxiliary diverter plates are symmetrical with respect to the center of the conical diverter plate.

3. A vibrating screen device for screening polyolefin powder according to claim 2, characterized in that: A plurality of fifth through holes are evenly opened on the auxiliary diverter plate, the opening direction of the fifth through holes is vertical, and the gap between two adjacent fifth through holes is less than twice the diameter of the fifth through hole.

4. A vibrating screen device for screening polyolefin powder according to claim 1 or 3, characterized in that: The central axis of the fifth through hole does not coincide with the central axis of the fourth through hole.

5. A vibrating screen device for screening polyolefin powder according to claim 1, characterized in that: The upper end of the conical diverter plate is fixedly connected with a protective plate.

6. A vibrating screen device for screening polyolefin powder according to claim 5, characterized in that: The upper end of the conical splitter plate is provided with a plurality of third through holes, and the lower end of the protection plate is fixedly connected with a plurality of connecting columns matched with the third through holes, and the connecting columns are inserted into the third through holes.

7. A vibrating screen device for screening polyolefin powder according to claim 1, characterized in that: The conical diverter plate is fixedly connected with a sleeve, the hopper is provided with a connecting shaft, and the sleeve is sleeved on the connecting shaft.

8. A vibrating screen device for screening polyolefin powder according to claim 7, characterized in that: The inner surface of the sleeve is provided with a plurality of limit blocks, the connecting shaft is provided with a plurality of limit grooves matching with the limit blocks, and the limit blocks are inserted in the limit grooves.

9. A vibrating screen device for screening polyolefin powder according to claim 7, characterized in that: The hopper is provided with a first through hole and a second through hole, wherein sliding rings are installed in the first through hole and the second through hole, and both ends of the connecting shaft pass through the sliding rings and are located outside the hopper.

10. A vibrating screen device for screening polyolefin powder according to claim 7, characterized in that: One end of the connecting shaft is fixedly connected with a handle, and the other end of the connecting shaft is threadedly connected with a nut.

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