Impurity removal device for modified plastic production

Abstract

The utility model relates to the technical field of modified plastic production equipment, in particular to an impurity removal device for modified plastic production, which comprises a feeding machine, the feeding machine sucks materials by negative pressure and comprises a feeding barrel, and a filter component is arranged at the top of the feeding barrel; the filtering assembly comprises a plurality of filters which can be independently detached; and the ash removal assembly comprises a reverse blowing assembly and an ash discharge assembly. According to the utility model, the filters are fixed by matching the isolation plate and the sealing cover, and after the sealing cover is screwed out, one of the filters can be independently replaced without opening the top cover, so that the replacement steps of the filters are simplified, the replacement speed is improved, the filters can be replaced after material suction is finished, and non-stop replacement is realized; the filter can be back-blown by using the back-blowing pipe, impurities on the surface of the filter are reduced, and the replacement interval is prolonged; the first check valve is used for closing the material blocking hopper, impurities can be prevented from falling into the material collecting bin during back flushing, and the impurities can be discharged through the ash discharging pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of modified plastics production equipment, specifically a purification device for modified plastics production. Background Technology

[0002] Modified plastics refer to plastic products that have been modified by methods such as filling, blending, and reinforcement based on general-purpose plastics and engineering plastics, thereby improving their properties such as flame retardancy, strength, impact resistance, and toughness.

[0003] The plastic granules and various additives used as raw materials often have dust and other impurities adhering to their surfaces. During modified plastics production, the plastic granules need to be cleaned to remove these impurities. Typically, when using a vacuum feeder, the plastic granules collide with the feeder's cylinder wall, causing the surface impurities to fall off and be adsorbed onto the feeder's filter screen. However, the filter screen needs to be cleaned and replaced regularly; otherwise, the feeding and impurity removal efficiency will decrease. Replacing the filter screen requires machine downtime, which is time-consuming and affects production efficiency. There are also techniques that use backflushing to clean the filter screen and reduce the frequency of replacement, but for modified plastics production, most of the material adhering to the filter screen is impurities, and backflushing would cause these impurities to fall back into the material. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a purification device for modified plastic production.

[0005] The technical solution of this utility model is:

[0006] A purification device for modified plastics production, comprising:

[0007] The feeding machine uses negative pressure to suck up materials. The feeding machine includes a feeding barrel, a material collection bin at the bottom of the feeding barrel, and a filter assembly at the top of the feeding barrel.

[0008] The filtration assembly includes several filters, each of which can be individually disassembled.

[0009] The dust removal assembly includes a back-blowing assembly and a dust discharge assembly. The back-blowing assembly is connected to the filter, and the dust discharge assembly is installed between the feeding hopper and the collection hopper to prevent impurities from entering the collection hopper and to discharge the impurities.

[0010] Preferably, the top of the feeding hopper is provided with a top cover, and a vacuum tube is provided on the side of the top cover. The vacuum tube is used to connect to a vacuum device to generate negative pressure inside the top cover. A suction pipe is provided on the top side of the collecting hopper, and the suction pipe is used to suck in the material.

[0011] Preferably, the top of the top cover is provided with a plurality of mounting tubes evenly distributed on the top, the end of the mounting tube is threaded with a cap, and an isolation plate is provided below the top cover and inside the feeding hopper. The filter is slidably installed in the mounting tube and passes through the isolation plate.

[0012] Preferably, the filter includes a filter frame, the top of which abuts against the inner top surface of the cover, a limiting ring is provided in the middle of the filter frame, and a filter screen is fitted at the bottom of the filter frame, with the top surface of the filter screen abutting against the bottom surface of the limiting ring.

[0013] Preferably, the filter screen is inserted into the feeding hopper through the isolation plate, and a sealing ring is provided below the head of the filter screen, the sealing ring abutting against the top surface of the isolation plate.

[0014] Preferably, the backflush assembly includes a backflush pipe, the bottom of which is inserted into the filter frame through the cap, and the head of the backflush pipe is provided with a backflush valve.

[0015] Preferably, the ash discharge assembly includes a baffle hopper located at the top of the collection bin. A first check valve is rotatably installed at the bottom of the baffle hopper. An ash discharge pipe is provided in the middle of the first check valve. One end of the ash discharge pipe extends into the baffle hopper, and the other end passes through the collection bin and is connected to a second check valve.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes a separator plate and a cover to fix the filter. After unscrewing the cover, one filter can be replaced individually without opening the top cover, simplifying the filter replacement process and increasing the replacement speed. The filter can be replaced after the material is collected, achieving replacement without stopping the machine. The backflush pipe can be used to backflush the filter, reducing impurities on the filter surface and extending the replacement interval. The first check valve closes the baffle hopper to prevent impurities from falling into the collection bin during backflush, and the ash discharge pipe can discharge the impurities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the feeding machine structure in this utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the filter component structure in this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Feeding machine; 11. Feeding hopper; 12. Suction pipe; 13. Discharge hopper; 14. Top cover; 15. Vacuum tube; 16. Discharge valve; 17. Collection bin;

[0024] 2. Filter assembly; 21. Mounting tube; 22. Cover; 23. Filter frame; 24. Limiting ring; 25. Filter screen; 26. Sealing ring; 27. Isolation plate;

[0025] 3. Dust removal assembly; 31. Backflush pipe; 32. Backflush valve; 33. Baffle hopper; 34. First check valve; 35. Dust discharge pipe; 36. Second check valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] Please see Figure 1-4 The present invention will describe the above technical solution in detail through the following embodiments:

[0029] A purification device for modified plastics production, comprising:

[0030] The feeding machine 1 uses negative pressure to suck up materials. The feeding machine 1 includes a feeding barrel 11. A collection bin 17 is fixedly installed at the bottom of the feeding barrel 11 by bolts. A filter assembly 2 is provided at the top of the feeding barrel 11.

[0031] The top of the feeding hopper 11 is fixed with a top cover 14 by bolts. A vacuum tube 15 is welded to the side of the top cover 14. The vacuum tube 15 is connected to a vacuum device through a pipe to generate negative pressure inside the top cover 14. The top of the side of the collection bin 17 is provided with a suction pipe 12, which is used to suck up the material.

[0032] The vacuum device can adopt a known vacuum negative pressure system. The negative pressure device generates negative pressure at the vacuum tube 15, and the negative pressure is transmitted to the suction tube 12. The suction tube 12 can use the negative pressure to suck in the material.

[0033] After being sucked in, the material moves in a spiral motion along the side of the collection bin 17 and collides with the inner wall of the collection bin 17, thereby removing dust and other impurities.

[0034] A discharge hopper 13 is fixedly installed in the middle of the collection bin 17 by screws. A discharge valve 16 is rotatably installed at the bottom of the discharge hopper 13. When the discharge valve 16 is closed, the material remains above the discharge hopper 13. When the discharge valve 16 is open, the material can enter known modified plastic processing equipment such as extruders.

[0035] The filter assembly 2 includes several filters, which can be individually removed.

[0036] Four mounting tubes 21 are evenly welded to the top of the top cover 14. The end of the mounting tube 21 is threaded with a cap 22. A partition plate 27 is provided below the top cover 14 and inside the feeding hopper 11. The filter is slidably installed inside the mounting tube 21 and passes through the partition plate 27.

[0037] The isolation plate 27 has several circular through holes axially extending through it. The number of through holes is the same as the number of mounting pipes 21, and the through holes coincide with the axis of the mounting pipes 21.

[0038] The filter includes a filter frame 23, the top of which abuts against the inner top surface of the cover 22, a limiting ring 24 is welded in the middle of the filter frame 23, and a filter screen 25 is fitted at the bottom of the filter frame 23, with the top surface of the filter screen 25 abutting against the bottom surface of the limiting ring 24.

[0039] After the cap 22 is tightened, it can press down on the filter frame 23 and prevent the filter frame 23 from moving. There is space between the limiting ring 24 and the inner top surface of the top cover 14.

[0040] The filter screen 25 is inserted into the feeding barrel 11 through the isolation plate 27. A sealing ring 26 is fitted under the head of the filter screen 25, and the sealing ring 26 abuts against the top surface of the isolation plate 27.

[0041] The sealing ring 26 can be a known O-ring. The elasticity of the sealing ring 26 can make the inner side of the filter screen 25 fit with the filter frame 23, and the filter screen 25 and the filter frame 23 are fixed by friction.

[0042] After the cap 22 is tightened, it presses the filter frame 23 downward, which in turn causes the limiting ring 24 to press the filter screen 25 and the sealing ring 26 downward, so that the sealing ring 26 is tightly attached to the top surface of the isolation plate 27 to achieve a seal.

[0043] When the vacuum tube 15 draws in air, the air in the collection bin 17 will pass through the filter screen 25 and enter the filter frame 23, then enter between the top cover 14 and the isolation plate 27, and then be discharged from the vacuum tube 15. Impurities will remain on the outer side of the filter screen 25.

[0044] The dust removal assembly 3 includes a back-blowing assembly and a dust discharge assembly. The back-blowing assembly is connected to the filter, and the dust discharge assembly is installed between the feeding hopper 11 and the collection hopper 17 to prevent impurities from entering the collection hopper 17 and to discharge the impurities.

[0045] The backflush assembly includes a backflush pipe 31, the bottom of which passes through the cap 22 and is inserted into the filter frame 23. A backflush valve 32 is threadedly connected to the head of the backflush pipe 31.

[0046] The backflush pipe 31 is connected to the air outlet of the vacuum device through a pipe. The backflush valve 32 can be a known solenoid valve. When the backflush valve 32 is opened, compressed air enters the backflush pipe 31, then blows into the filter frame 23, and then enters the feed hopper 11 through the filter screen 25, thereby causing impurities on the outside of the filter screen 25 to separate from the filter screen 25.

[0047] The ash discharge assembly includes a baffle 33, which is fixedly installed on the top of the collection bin 17 by bolts. A first check valve 34 is rotatably installed at the bottom of the baffle 33. An ash discharge pipe 35 is snapped into the middle of the first check valve 34. One end of the ash discharge pipe 35 extends into the baffle 33, and the other end passes through the collection bin 17 and is connected to a second check valve 36.

[0048] The ash discharge pipe 35 is made of flexible hose. When the first check valve 34 is closed, the bottom of the baffle hopper 33 is sealed. At this time, the impurities separated from the filter screen 25 by the backflushing will fall into the baffle hopper 33 and then be discharged from the ash discharge pipe 35 under the action of compressed air.

[0049] When the first check valve 34 is opened, the baffle hopper 33 is connected to the collection bin 17, and the material suction operation can be carried out. At this time, the second check valve 36 can prevent air from entering the ash discharge pipe 35 and ensure the pressure in the collection bin 17.

[0050] Working principle:

[0051] Material suction operation:

[0052] Open the second check valve 36, and close the discharge valve 16 and the backflush valve 32.

[0053] A vacuum device generates negative pressure at vacuum tube 15, which is then transmitted to suction tube 12, where the suction tube 12 can use the negative pressure to draw in the material.

[0054] After being sucked in, the material moves in a spiral motion along the side of the collection bin 17 and collides with the inner wall of the collection bin 17, thereby removing dust and other impurities.

[0055] Impurities will move upward with the air, pass through the baffle 33 and enter the feed hopper 11. Then the air will pass through the filter screen 25 and enter the filter frame 23, then enter between the top cover 14 and the isolation plate 27, and then be discharged from the vacuum tube 15. Impurities will remain on the outer side of the filter screen 25.

[0056] Material feeding operation:

[0057] Stop the vacuum device and open the discharge valve 16. The material will be discharged from the discharge hopper 13.

[0058] Dust removal procedure:

[0059] Close the discharge valve 16 and the second check valve 36, and open the backflush valve 32.

[0060] Compressed air enters the backflush pipe 31, then blows into the filter frame 23, and then enters the feed hopper 11 through the filter screen 25, thereby causing impurities on the outside of the filter screen 25 to separate from the filter screen 25.

[0061] Because the impurities separated from the filter screen 25 by the backflushing will fall into the baffle hopper 33, and then be discharged from the ash discharge pipe 35 under the action of compressed air.

[0062] Replace filter 25:

[0063] Close the backflush valve 32, unscrew one of the caps 22, pull out the filter frame 23, filter screen 25 and sealing ring 26 below the cap 22 from the installation tube 21, insert a new filter frame 23, filter screen 25 and sealing ring 26, and then tighten the cap 22.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A purification device for modified plastics production, characterized in that, include: The feeding machine (1) uses negative pressure to suck up materials. The feeding machine (1) includes a feeding barrel (11), the bottom of which is provided with a collection bin (17), and the top of which is provided with a filter assembly (2). The filter assembly (2) includes several filters, each of which can be individually disassembled; The dust removal assembly (3) includes a back-blowing assembly and a dust discharge assembly. The back-blowing assembly is connected to the filter, and the dust discharge assembly is installed between the feeding hopper (11) and the collection bin (17) to prevent impurities from entering the collection bin (17) and to discharge the impurities.

2. The impurity removal device for modified plastics production as described in claim 1, characterized in that: The top of the feeding hopper (11) is provided with a top cover (14), and a vacuum tube (15) is provided on the side of the top cover (14). The vacuum tube (15) is used to connect to a vacuum device to generate negative pressure inside the top cover (14). The top of the side of the collection bin (17) is provided with a suction pipe (12), which is used to suck up the material.

3. The impurity removal device for modified plastics production as described in claim 2, characterized in that: The top cover (14) is provided with several mounting tubes (21) evenly distributed on the top. The end of the mounting tube (21) is threaded with a cap (22). The top cover (14) is provided with an isolation plate (27) located below and inside the feeding hopper (11). The filter is slidably installed inside the mounting tube (21) and passes through the isolation plate (27).

4. The impurity removal device for modified plastics production as described in claim 3, characterized in that: The filter includes a filter frame (23), the top of the filter frame (23) abuts against the inner top surface of the cover (22), a limiting ring (24) is provided in the middle of the filter frame (23), and a filter screen (25) is fitted at the bottom of the filter frame (23), with the top surface of the filter screen (25) abutting against the bottom surface of the limiting ring (24).

5. The impurity removal device for modified plastics production as described in claim 4, characterized in that: The filter screen (25) is inserted into the feeding bucket (11) through the isolation plate (27). A sealing ring (26) is provided below the head of the filter screen (25), and the sealing ring (26) abuts against the top surface of the isolation plate (27).

6. The impurity removal device for modified plastics production as described in claim 3, characterized in that: The backflush assembly includes a backflush pipe (31), the bottom of which is inserted into the filter frame (23) through the cover (22), and the head of the backflush pipe (31) is provided with a backflush valve (32).

7. The impurity removal device for modified plastics production as described in claim 2, characterized in that: The ash discharge assembly includes a baffle hopper (33), which is located at the top of the collection bin (17). A first check valve (34) is rotatably installed at the bottom of the baffle hopper (33). An ash discharge pipe (35) is provided in the middle of the first check valve (34). One end of the ash discharge pipe (35) extends into the baffle hopper (33), and the other end passes through the collection bin (17) and is connected to a second check valve (36).

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