A scraper type dust removal device is additionally arranged above a pressurizing cover of an internal mixer

Abstract

The application relates to the technical field of internal mixers, in particular to a scraper type dust removal device arranged above a pressurizing cover of an internal mixer, which comprises a scraping and sucking mechanism arranged at the bottom of a machine shell and used for scraping and collecting dust on the top side wall of a press hammer body; a dust removing mechanism is connected with the press hammer body to clean the scraping and sucking mechanism; wherein the scraping and sucking mechanism comprises: a wall scraping component group, which comprises a plate piece hinged to the bottom of the machine shell, a scraping head arranged at the tail end of the plate piece and wing plates fixed to the two sides of the plate piece; two groups of symmetrically arranged scraping and sucking mechanisms are connected with the wing plates through tension springs to make the scraping heads tightly contact with the top side wall of the press hammer body. The scraping and sucking mechanism and the dust removing mechanism are connected with the lifting movement of the press hammer body, the scraping and collecting of the dust on the top side wall of the press hammer body and the self-cleaning of the filtering component can be completed without manual intervention, the cumbersome step of manually disassembling the machine shell for cleaning is omitted, the cleaning efficiency is greatly improved, and the labor cost investment is reduced.

Description

Technical Field

[0001] This invention relates to the field of internal mixer technology, specifically to a dust removal device with a scraper installed above the pressure cover of an internal mixer. Background Technology

[0002] An internal mixer is a key piece of equipment used for the mixing and processing of polymer materials such as rubber and plastics. Its core function is to use the strong mechanical action between the internal rotor and the mixing chamber to uniformly mix raw rubber and compounding agents (such as carbon black, sulfur, accelerators, etc.) to produce a compound that meets the process requirements, laying the foundation for subsequent calendering, extrusion, molding and other processes.

[0003] The mixing chamber is equipped with a pressure hammer, also known as a pressure cover. The pressure hammer applies pressure through a hydraulic or pneumatic system to ensure that the material remains compacted during the mixing process, thereby enhancing the mixing effect. However, in actual production, the surface of the pressure hammer is exposed to the mixing environment for a long time. Powdered additives (such as carbon black and calcium carbonate) are easily splashed onto the top and side walls of the pressure hammer. They have a certain degree of adsorption and easily absorb moisture, which mixes with the residual material to form a sticky substance. The sticky substance will accumulate layer by layer and even seep into the gaps or threaded holes on the surface of the pressure hammer. Therefore, manual cleaning is required. However, the pressure hammer is located inside the machine casing and is obstructed. Manual cleaning requires disassembling the machine casing, which results in low cleaning efficiency and high labor costs. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a scraper-type dust removal device installed above the pressure cover of a mixer, so as to solve the problems mentioned in the background art that the surface of the pressure hammer needs to be manually cleaned after the accumulation of sticky substances, and the cleaning requires disassembling the machine casing, resulting in low cleaning efficiency and high labor costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A dust removal device with a scraper type installed above the pressure cover of a mixing mill includes a housing and a hydraulic press mounted on the housing. The working end of the hydraulic press is connected to a pressure hammer body. The device further includes: a scraping and suction mechanism located at the bottom of the housing for scraping and collecting dust from the top side wall of the pressure hammer body; and a dust removal mechanism that moves in conjunction with the pressure hammer body to clean the scraping and suction mechanism. The scraping and suction mechanism includes: a wall scraping component assembly comprising a plate hinged to the bottom of the housing, a scraper head mounted at the end of the plate, and wing plates fixed to both sides of the plate. Two symmetrically arranged scraping and suction mechanisms are connected by a tension spring between the wing plates to keep the scraper head pressed tightly against the top side wall of the pressure hammer body; and a wall suction component assembly comprising an end dust collection box with an air inlet groove and a rear dust collection box connected thereto. The bottom of the rear dust collection box... The system includes an upper air nozzle; a filter chamber assembly comprising a lower air nozzle connected to the upper air nozzle, a gas pipe connected to the lower air nozzle, a chamber box connected through the gas pipe, a filter plate inside the chamber box, a gas pipe connected to the top of the chamber box, a lower air nozzle connected to the gas pipe, and a gas pipe connected to the two lower air nozzles; a vacuum pump connected to the gas pipe to drive the airflow; and a dust removal mechanism comprising: a storage box installed at the bottom of the chamber box via a sliding groove; an inner scraper ring slidably disposed inside the chamber box and in contact with the filter plate on both sides, with its top connected to the chamber box via a tension spring; and a push rod, one end of which is connected to the inner scraper ring, and the other end extending to contact the housing; and when the pressure hammer rises, it simultaneously triggers the scraper head to scrape dust, the vacuum pump to suck up dust, and the inner scraper ring to clean dust.

[0007] Preferably, in the wall scraper assembly, the scraper head is detachably mounted to the plate by bolts, and the wing plates of the two scraping and suction mechanisms are elastically closed by tension springs.

[0008] Preferably, in the wall suction component assembly, the end dustbin and the rear dustbin are connected via a pluggable interface.

[0009] Preferably, the end dust collection box is detachably fixed to the plate by bolts.

[0010] Preferably, in the filter chamber assembly, two filter plates are symmetrically arranged inside the chamber, and a gas pipe one inputs dust-laden airflow into the center of the chamber. After the airflow is split by the two filter plates, it is discharged through a symmetrically arranged gas pipe two.

[0011] Preferably, gas pipe one, gas pipe two, and gas pipe three are rigid pipes.

[0012] Preferably, the gas tube 3 is slidably fitted with the housing via a groove and is connected to the vacuum pump via a hose.

[0013] Preferably, in the dust removal mechanism, when the push rod rises with the pressure hammer and contacts the housing, it drives the inner scraper ring to move down and scrape off the dust on the surface of the filter plate, and the dust falls into the storage box; when the pressure hammer descends, the inner scraper ring is reset by the tension spring.

[0014] Preferably, the storage box can be pulled out and removed from the bottom of the box along a sliding groove.

[0015] Preferably, the end of the push rod away from the inner scraper ring is provided with a rubber pad that contacts the machine housing, and the push rod slides in conjunction with the hammer body through a groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By linking the lifting and lowering motion of the pressure hammer body with the scraping and suction mechanism and the dust removal mechanism, the dust on the top side wall of the pressure hammer body can be scraped, collected, and the filter components can be self-cleaned without manual intervention. This eliminates the tedious steps of manually disassembling the casing for cleaning, greatly improves cleaning efficiency, and reduces labor costs.

[0018] The scraper head continuously scrapes dust off the surface of the hammer body, preventing sticky substances from accumulating and seeping into gaps or threaded holes. This reduces problems such as decreased sealing performance of the hammer body and increased operating resistance caused by impurities, lowers the probability of equipment wear, and extends the service life of key components of the internal mixer.

[0019] The wall suction unit assembly, together with the vacuum pump mechanism, forms a negative pressure dust collection system that can promptly remove the dust scraped off by the scraper head, preventing secondary dispersion. The filter chamber assembly traps dust through the filter plate and, together with the dust removal mechanism, collects the dust into the storage box for centralized recycling and processing. This reduces the waste of powdered additives, lowers dust pollution in the workshop, and improves the working environment.

[0020] The scraper head, end dust collection box and other components are designed to be detachable, making them easy to replace after wear; the elasticity of the tension spring keeps the scraper head in close contact with the pressure hammer body, adapting to the positional changes of the pressure hammer body during lifting and lowering; the storage box can be pulled out and removed for easy dust cleaning, and the overall structure takes into account both operational stability and ease of maintenance.

[0021] During the rise of the pressure hammer, dust scraping, dust suction and ash removal actions are triggered simultaneously. No additional power control is required. It is seamlessly connected with the original workflow of the internal mixer and does not affect the normal production rhythm. It ensures production continuity while guaranteeing the cleaning effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the scraping and suction mechanism and the dust removal mechanism of the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the scraping and suction mechanism and the dust removal mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the bottom portion of the scraping and suction mechanism and the dust removal mechanism of the present invention;

[0026] Figure 5This is a schematic diagram of the scraping and suction mechanism of the present invention;

[0027] Figure 6 This is a cross-sectional view of the scraping and suction mechanism of the present invention.

[0028] Figure 7 This is a schematic diagram of the structure of the filter chamber component assembly and the pressure hammer body of the present invention;

[0029] Figure 8 This is a schematic diagram of the filter chamber component assembly and dust removal mechanism of the present invention;

[0030] Figure 9 This is a cross-sectional view of the filter chamber assembly and dust removal mechanism of the present invention.

[0031] Figure 10 This is a partial cross-sectional structural schematic diagram of the dust removal mechanism of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the inner scraper ring, storage box, and filter plate of the present invention.

[0033] Figure 12 This is a schematic diagram of the operation of the device of the present invention.

[0034] In the diagram: 11. Housing; 12. Pressure hammer body; 13. Hydraulic press; 2. Scraping and suction mechanism; 21. Wall scraper assembly; 211. Plate; 212. Scraper head; 213. Wing plate; 22. Wall suction assembly; 221. End dust collection box; 222. Rear dust collection box; 223. Upper air nozzle; 23. Filter chamber assembly; 231. Lower air nozzle one; 2311. Gas pipe one; 232. Chamber box; 233. Filter plate; 234. Lower air nozzle two; 2341. Gas pipe two; 2342. Gas pipe three; 235. Vacuum pump; 3. Dust removal mechanism; 31. Storage box; 32. Inner scraper ring; 33. Push rod. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] One embodiment provided by the present invention:

[0037] A scraper-type dust removal device is installed above the pressure cover of an internal mixer, including a housing 11. A hydraulic press 13 is mounted on the housing 11, and a pressure hammer body 12 is connected to the working end of the hydraulic press 13. The device also includes:

[0038] Scraping and suction mechanism 2 is located at the bottom of the housing 11. The scraping and suction mechanism 2 is used to scrape and collect dust from the top side wall of the pressure hammer body 12. The scraping and suction mechanism 2 includes a wall scraping component group 21 and a wall suction component group 22.

[0039] The wall scraper assembly 21 includes a plate 211, one end of which is hinged to the bottom surface of the housing 11, and the other end of which is bolted to a scraper head 212. Wing plates 213 are fixedly connected to both sides of the plate 211. The scraping and suction mechanism 2 is provided in two sets, and the two sets of scraping and suction mechanisms 2 are symmetrically distributed on both sides of the pressure hammer body 12. The scraper head 212 is used to scrape and contact the top wall of the pressure hammer body 12. A tension spring is connected between the two wing plates 213 in the two sets of scraping and suction mechanisms 2. The tension spring is used to pull the scraping and suction mechanisms 2 on both sides of the pressure hammer body 12 closer to each other.

[0040] The wall suction component assembly 22 includes an end dust collection box 221 and a rear dust collection box 222. Both the end dust collection box 221 and the rear dust collection box 222 have cavities. The end dust collection box 221 has an air inlet groove facing the scraper head 212. The end dust collection box 221 is detachably mounted on the plate 211 by bolts. There is a pluggable interface between the end dust collection box 221 and the rear dust collection box 222, and the end dust collection box 221 and the rear dust collection box 222 are connected through the interface. The rear dust collection box 222 is fixedly connected to the plate 211, and an upper air nozzle 223 is opened at the bottom of the rear dust collection box 222.

[0041] The scraping and suction mechanism 2 also includes a filter chamber component group 23, which includes a lower air nozzle 1 231 and a lower air nozzle 234. There are two lower air nozzles 234. The lower air nozzles 234 and 231 are installed on the pressure hammer body 12 through a groove. One end of the lower air nozzle 231 is connected to the upper air nozzle 223 through an air pipe. The other end of the lower air nozzle 231 is connected to a gas pipe 2311. The end of the gas pipe 2311 away from the lower air nozzle 231 is connected to a chamber 232. A filter plate 233 is installed inside the chamber 232. Gas pipes 2341 are provided on both sides of the top of the chamber 232. Gas pipes 2341 are connected between the lower air nozzles 234 and the chamber 232. A gas pipe 3 2342 is connected between the two lower air nozzles 234 and the vacuum pump 235.

[0042] The vacuum pump 235 generates suction, and external air enters the rear dust collection box 222 through the air inlet slot of the end dust collection box 221 and the interface, then enters the lower air inlet 231 through the upper air nozzle 223 and the air pipe. (See reference) Figure 10The gas flows into the chamber 232 through the gas pipe 2311. Then the gas passes through the filter plate 233. Dust and other particles will adhere to the surface of the filter plate 233. After passing through the filter plate 233, the gas flows into the lower air nozzle 234 through the top gas pipe 2341. Then it enters the vacuum pump 235 through the lower air nozzle 234 and the gas pipe 2342 before being discharged.

[0043] Each of the following components is provided in two sets: 232 (Gas Pipe 2341), 234 (Lower Gas Nozzle 234), and 2342 (Gas Pipe 3342). These two sets are symmetrically distributed on both sides of the first gas pipe 2311. The gas flow direction within the 232 is as follows: Figure 10 As shown, the airflow flows from the middle to both sides. The filter plates 233 on both sides of the chamber 232 filter the airflow, and the filtered dust adheres to the filter plates 233.

[0044] It should be noted that gas tube 3 2342, gas tube 2 2341 and gas tube 1 2311 are all made of hard plastic. Among them, the end of gas tube 3 2342 away from the lower air nozzle 2 234 is connected to the working end of the vacuum pump 235 through a soft air tube. Gas tube 3 2342 slides in contact with the housing 11 through a sliding groove.

[0045] The dust removal mechanism 3 is used to scrape off the dust attached to the filter plate 233 under the movement of the pressure hammer 12. The dust removal mechanism 3 includes a storage box 31, which is installed at the bottom of the filter plate 233 through a sliding groove. The storage box 31 is provided with an inner scraper ring 32, which is slidably installed in the storage box 232. The inner scraper ring 32 can only slide up and down in the storage box 232. A tension spring is provided between the top of the inner scraper ring 32 and the storage box 232. Scrapers are provided on both sides of the inner scraper ring 32. The scrapers are in contact with the surface of the filter plate 233 and are used to scrape off the attached dust. A push rod 33 is connected to the top of the inner scraper ring 32. The push rod 33 is in slidable contact with the storage box 232 and the pressure hammer 12 through the sliding groove. A rubber pad is provided at the end of the push rod 33 away from the filter plate 233 and is used to contact the housing 11 through the rubber pad.

[0046] When the integrated internal mixer is working, the hydraulic press 13 drives the pressure hammer 12 to move downwards, pressing the pressure hammer 12 into the mixing chamber to compress the mixture and make it uniformly mixed. At this time, the relative positions of the pressure hammer 12 and the machine casing 11 are as follows: Figure 12 As shown in the left-side view, when the internal mixer finishes its work, the pressure hammer 12 is driven upward by the hydraulic press 13 to remove the mixture. At this time, the overall structure will change from... Figure 12Changing from the left view to the right view, when the pressure hammer 12 rises, the pressure hammer 12 expands the scraping and suction mechanisms 2 on both sides through the top side wall. Under the action of the tension spring, the scraper head 212 will continuously scrape the side wall surface of the pressure hammer 12. At the same time as the pressure hammer 12 rises, the vacuum pump 235 starts to generate suction. The air inlet groove of the end dust collection box 221 sucks dust at the scraping position of the scraper head 212. The sucked-in dust will enter the box 232 and be blocked and filtered by the filter plate 233, while the outside gas is discharged again.

[0047] As the pressure hammer 12 rises, one end of the push rod 33 contacts the housing 11. As the pressure hammer 12 continues to rise, the push rod 33 is pushed partially into the pressure hammer 12. The end of the push rod 33 furthest from the housing 11 is connected to the inner scraper ring 32 inside the storage box 232, causing the inner scraper ring 32 to move downwards within the storage box 232. As it moves downwards, the inner scraper ring 32 scrapes off the dust adhering to the filter plates 233 on both sides, storing the scraped dust in the lower storage box 31. After repeated use, the storage box 31 can be pulled out from the bottom of the storage box 232 for easy emptying of the dust.

[0048] Working principle:

[0049] After the internal mixer completes the mixing operation, the hydraulic press 13 drives the hammer body 12 to rise. The side walls of the hammer body 12 expand the two scraping and suction mechanisms 2. The tension spring pulls the wing plate 213, causing the scraper head 212 to continuously scrape against the top side wall of the hammer body 12. At the same time, the vacuum pump 235 starts to generate negative pressure suction. The dust scraped off by the scraper head 212 is sucked into the air inlet slot of the end dust collection box 221 and enters the cavity of the rear dust collection box 222 through the interface. The dust-laden airflow is introduced into the lower air inlet 231 through the upper air nozzle 223 and then transported to the central cavity of the bin 232 through the gas pipe 2311. The airflow splits from the center to both sides in the bin 232 and penetrates the filter plate 233. The dust is trapped by the filter plate 233 and adheres to the surface. The purified gas is introduced into the lower air inlet 234 through the gas pipe 2341 and then discharged by the vacuum pump 235 through the gas pipe 3342.

[0050] During the ascent of the hammer body 12, the top of the push rod 33 contacts the fixed housing 11 and is pushed in the opposite direction as the hammer body 12 continues to rise, driving the inner scraper ring 32 to move downwards within the bin 232 against the resistance of the tension spring. The inner scraper ring 32 simultaneously scrapes the surface of the filter plate 233 on both sides, removing the attached dust. The scraped dust falls directly into the storage box 31 for temporary storage. When the hammer body 12 descends for mixing operations, the inner scraper ring 32 returns to the top of the bin 232 under the action of the tension spring. After multiple work cycles, the operator can manually remove the storage box 31 along the chute to clean the accumulated dust and perform internal maintenance through the bolt-removed dust collection box 221. This device achieves dust scraping, negative pressure dust collection, filtration, and self-cleaning functions simultaneously through the lifting and lowering movement of the hammer body 12, without requiring additional power control throughout the process.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A scraper-type dust removal device installed above the pressure cover of an internal mixer, comprising a machine housing and a hydraulic press mounted on the machine housing, wherein the working end of the hydraulic press is connected to a pressure hammer body, characterized in that, Also includes: The scraping and suction mechanism, located at the bottom of the housing, is used to scrape off and collect dust from the top side wall of the hammer body; The dust removal mechanism is linked to the movement of the pressure hammer to clean the scraping and suction mechanism; The scraping and suction mechanism includes: a wall scraping component assembly, comprising a plate hinged to the bottom of the housing, a scraper head installed at the end of the plate, and wing plates fixed to both sides of the plate. Two symmetrically arranged scraping and suction mechanisms are connected by a tension spring between the wing plates to keep the scraper head in close contact with the top wall of the pressure hammer body; a wall suction component assembly, comprising an end dust collection box with an air inlet groove and a rear dust collection box connected thereto, wherein the bottom of the rear dust collection box is provided with an upper air nozzle; a filter chamber component assembly, comprising a lower air nozzle one connected to the upper air nozzle, a gas pipe one connected to the lower air nozzle one, a chamber connected through the gas pipe one, a filter plate disposed in the chamber, a gas pipe two connected to the top of the chamber, a lower air nozzle two connected to the gas pipe two, and a gas pipe three connected to the two lower air nozzles two; and a vacuum pump connected to the gas pipe three to drive the airflow. The dust removal mechanism includes: a storage box, which is installed at the bottom of the storage box via a sliding groove; an inner scraper ring, which is slidably disposed inside the storage box and contacts the filter plates on both sides, and is connected to the storage box at the top via a tension spring; and a push rod, one end of which is connected to the inner scraper ring and the other end of which extends to contact the housing. When the pressure hammer body rises, it simultaneously triggers the dust scraping action of the scraper head, the dust suction action of the vacuum pump, and the dust cleaning action of the inner scraper ring.

2. The dust removal device with scraper installed above the pressure cover of the internal mixer according to claim 1, characterized in that: In the wall scraper assembly, the scraper head is detachably mounted to the plate by bolts, and the wing plates of the two scraping and suction mechanisms are elastically closed by tension springs.

3. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: In the wall suction component assembly, the end dustbin and the rear dustbin are connected via a pluggable interface.

4. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: The end dust collection box is detachably fixed to the plate by bolts.

5. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: In the filter chamber assembly, two filter plates are symmetrically arranged inside the chamber. A gas pipe one inputs dust-laden airflow into the center of the chamber, and the airflow is diverted by the two filter plates and then exited by the symmetrically arranged gas pipe two.

6. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 5, characterized in that: Gas pipe one, gas pipe two, and gas pipe three are rigid pipes.

7. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 5, characterized in that: The gas tube 3 slides into the housing via a groove and is connected to the vacuum pump via a hose.

8. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: In the dust removal mechanism, when the push rod rises with the pressure hammer and contacts the housing, it drives the inner scraper ring to move down and scrape off the dust on the surface of the filter plate, and the dust falls into the storage box; when the pressure hammer descends, the inner scraper ring is reset by the tension spring.

9. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: The storage box can be pulled out and removed from the bottom of the box along the slide groove.

10. A scraper-type dust removal device installed above the pressure cover of a mixing mill according to claim 1, characterized in that: The end of the push rod away from the inner scraper ring is provided with a rubber pad that contacts the machine housing, and the push rod slides in conjunction with the hammer body through a groove.

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