Material reduction screw conveying integrated system

Abstract

The application discloses a material reduction spiral conveying integrated system, which comprises a shell, an extension shell is fixedly arranged at a feeding section of the shell, a buffer cavity is formed in the extension shell, an annular accommodating cavity is formed in the outer side of the extension shell, and a feeding port communicated with the buffer cavity is arranged on the extension shell; a filter cartridge mechanism comprising a first sliding ring and a filter cartridge, the first sliding ring is sealingly and slidingly arranged in the shell, one end of the filter cartridge is sealingly and rotatably arranged on the inner side of the first sliding ring, and the other end of the filter cartridge is slidingly accommodated in the accommodating cavity; a partition plate mechanism comprising a second sliding ring and a partition plate, the second sliding ring is sealingly and slidingly arranged in the shell, and the partition plate is sealingly and rotatably arranged on the inner side of the second sliding ring; a spiral conveying mechanism comprising a conveying shaft and a spiral blade, the conveying shaft is rotatably arranged in the shell, and the spiral blade is fixedly arranged on the conveying shaft and located on the inner side of the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of material conveying and volume reduction technology, specifically a material reduction spiral conveying integrated system. Background Technology

[0002] In the pulp and paper manufacturing and waste paper recycling industries, the transportation and pretreatment of pulp materials are crucial process steps. Virgin pulp, waste paper pulp, and other medium-to-low concentration pulps are characterized by their large volume and high moisture content. Direct long-distance transportation or subsequent refining is extremely energy-intensive and uneconomical. Therefore, simultaneously dewatering and reducing the volume and weight of the pulp during transportation is of great significance for saving transportation costs, improving the efficiency of subsequent processes, and reducing the overall energy consumption of the system.

[0003] Currently, the industry generally adopts a separate processing mode for "conveyance" and "dewatering," that is, using ordinary screw conveyors to send pulp to thickening or dewatering equipment for processing, and then conveying the reduced pulp to the next process. This mode has obvious drawbacks: First, the process flow is long, the equipment occupies a large area, and the initial investment is high; second, the connection between different equipment is prone to process fluctuations, affecting the stability of pulp quality; third, for pulp fibers that are very prone to clogging, traditional fixed-screen dewatering equipment requires frequent shutdowns for cleaning, which seriously restricts the continuity of production.

[0004] Therefore, it is necessary to provide an integrated screw conveyor system for reducing material volume in order to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a material reduction screw conveyor integrated system, comprising:

[0006] The outer shell has an extension shell fixedly installed in its feeding section. A buffer cavity is formed inside the extension shell, and an annular receiving cavity is opened on the outer side of the extension shell. A feeding port communicating with the buffer cavity is provided on the extension shell.

[0007] A filter cartridge mechanism includes a first slip ring and a filter cartridge. The first slip ring is slidably and sealingly disposed in the housing. One end of the filter cartridge is rotatably and sealingly sleeved on the inner side of the first slip ring, and the other end is slidably housed in the receiving cavity.

[0008] A partition mechanism includes a second slip ring and a partition plate, wherein the second slip ring is slidably disposed in the housing, and the partition plate is rotatably sleeved on the inner side of the second slip ring.

[0009] A spiral conveying mechanism includes a conveying shaft and spiral blades. The conveying shaft is rotatably disposed in the housing, and the spiral blades are fixedly disposed on the conveying shaft and located inside the filter cylinder.

[0010] Furthermore, as a preferred embodiment, the spiral blade is a continuously variable pitch blade, which is divided into three segments with linearly decreasing pitch from the feed end to the discharge end. These segments are the gravity dewatering segment blade, the flexible dewatering segment blade, and the flexible compaction segment blade.

[0011] Furthermore, as a preferred embodiment, an arc-shaped back-blowing rod is fixedly provided on the first slip ring along the material conveying direction of the outer shell. The arc-shaped back-blowing rod is located in the top area of ​​the filter cylinder, and multiple back-blowing holes are opened at the bottom of the arc-shaped back-blowing rod.

[0012] The top of the extended shell is provided with an arc-shaped receiving groove, into which the arc-shaped backflush rod can slide.

[0013] Furthermore, as a preferred embodiment, the discharge end of the outer shell is fixedly provided with a plurality of hydraulic telescopic rods, the output end of the hydraulic telescopic rods is fixedly connected to the second slip ring and used to drive the second slip ring to slide, and a gap is provided between the second slip ring and the first slip ring and is fixedly connected by a plurality of connecting rods.

[0014] Furthermore, as a preferred embodiment, the partition plate is annular, with its inner side slidably sealed along the conveying shaft. The partition plate has a contoured through hole that matches the cross-sectional shape of the flexible compaction section blade. The contoured through hole fits the two sides of the flexible compaction section blade, each having a sliding cavity. A sealing block is slidably sealed within the sliding cavity, and the sealing block is slidably fitted with the flexible compaction section blade.

[0015] Furthermore, preferably, a guide block is fixedly provided on the sealing block;

[0016] A sealed cavity is formed in the sliding cavity, the guide block is slidably disposed along the sealed cavity, and the sealed cavity is filled with compressed gas.

[0017] Furthermore, as a preferred embodiment, the conveying shaft extends into an extension shaft on the side near the feed end. The extension shaft is located in the buffer chamber, and multiple spirally arranged rotating shafts are fixed radially on the extension shaft. A stirring rod is rotatably mounted on the rotating shaft.

[0018] Furthermore, as a preferred embodiment, a driving cavity is provided on one side of the extended shell, the driving cavity is connected to the receiving cavity, and a gear is rotatably disposed in the driving cavity;

[0019] A toothed ring is fixedly provided on the side of the filter cylinder near the extended shell, and the toothed rod is engaged with the toothed ring in a transmission manner.

[0020] Furthermore, preferably, a discharge port is provided at the bottom of the outer casing;

[0021] A baffle is fixedly installed on the first slip ring. The baffle is slidably and sealingly installed along the discharge port and divides the discharge port into a drain outlet located on one side of the filter cylinder and a feed outlet located on one side of the partition.

[0022] Compared with the prior art, the present invention provides an integrated screw conveyor system for material reduction, which has the following beneficial effects:

[0023] 1. Achieves online, stepless, and precise control of dewatering dryness: By driving the baffle mechanism and filter cartridge mechanism to slide synchronously through the hydraulic telescopic rod, the physical residence time and pressure path length of the material in the high-pressure dewatering section are directly changed, thereby meeting the precise requirements of different processes for the output dryness.

[0024] 2. Solves the problem of filter clogging: The innovative "rotating filter cartridge" and "top arc-shaped backflushing" design constitute an online self-cleaning system. The rotating filter cartridge continuously transports any clogged area to the top cleaning area, where the large-coverage arc-shaped backflushing bar performs efficient pulse cleaning, ensuring that the filter cartridge always maintains high permeability. This enables continuous, stable, and long-term operation of the equipment, greatly reducing maintenance downtime.

[0025] 3. Improved system anti-interference capability and operational stability: The buffer chamber and the stirring rod on the extension shaft form an "intelligent buffer unit". The buffer chamber can effectively absorb fluctuations in the feed flow rate, and the stirring rod can gently agitate to prevent fiber sedimentation and bridging, ensuring that the material in the water inlet dewatering section remains stable in terms of flow rate and concentration, thereby creating ideal working conditions for subsequent volume reduction treatment and ensuring the uniformity of the final output quality.

[0026] 4. Achieving the dual goals of energy saving and material protection: The design of the three-stage variable pitch helical blades creates a gentle pressure gradient from loose to tight and from fast to slow. This "gradual extrusion" consumes less energy than "abrupt high pressure" and significantly reduces shearing and damage to fiber materials. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the outer shell in this invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the extended shell in this invention;

[0030] Figure 4 This is a schematic diagram of the filter cartridge mechanism in this invention;

[0031] Figure 5 This is a schematic diagram of the partition mechanism in this invention;

[0032] Figure 6 This is a schematic diagram of the spiral conveying mechanism in this invention;

[0033] In the diagram: 1. Outer shell; 11. Extended shell; 12. Buffer chamber; 13. Receiving chamber; 14. Feed inlet; 15. Arc-shaped receiving groove; 16. Hydraulic telescopic rod; 17. Drive chamber; 18. Toothed rod; 19. Discharge port; 2. Filter cartridge mechanism; 21. First slip ring; 211. Baffle; 22. Filter cartridge; 23. Arc-shaped backflush rod; 24. Toothed ring; 3. Partition mechanism; 31. Second slip ring; 32. Partition; 321. Contouring through hole; 322. Sealing block; 323. Guide block; 324. Sealing chamber; 33. Connecting rod; 4. Screw conveying mechanism; 41. Conveying shaft; 42. Screw blade; 421. Gravity dewatering section blade; 422. Flexible dewatering section blade; 423. Flexible compaction section blade; 43. Stirring rod. Detailed Implementation

[0034] Please see Figures 1-6 In this embodiment of the invention, a material reduction screw conveyor integrated system includes:

[0035] The outer shell 1 has an extension shell 11 fixedly provided in its feeding section. The extension shell 11 has a buffer cavity 12 formed inside, and an annular receiving cavity 13 is opened on the outer side of the extension shell 11. The extension shell 11 is provided with a feeding port 14 that communicates with the buffer cavity 12.

[0036] The filter cartridge mechanism 2 includes a first slip ring 21 and a filter cartridge 22. The first slip ring 21 is slidably disposed in the outer shell 1. One end of the filter cartridge 22 is rotatably sleeved on the inner side of the first slip ring 21, and the other end is slidably stored in the receiving cavity 13.

[0037] The partition mechanism 3 includes a second slip ring 31 and a partition 32. The second slip ring 31 is slidably disposed in the outer shell 1, and the partition 32 is rotatably sleeved on the inner side of the second slip ring 31.

[0038] The spiral conveying mechanism 4 includes a conveying shaft 41 and a spiral blade 42. The conveying shaft 41 is rotatably disposed in the outer casing 1, and the spiral blade 42 is fixedly disposed on the conveying shaft 41 and located inside the filter cylinder 22.

[0039] In addition, the conveying shaft 41 is driven by a motor connected to the outside of the housing 1, and a reduction gearbox can be set between the motor and the conveying shaft 41 to precisely control the rotational speed of the conveying shaft 41.

[0040] An arc-shaped back-blowing rod 23 is fixedly provided on the first slip ring 21 along the material conveying direction of the outer shell 1. The arc-shaped back-blowing rod 23 is located in the top area of ​​the filter cylinder 22, and multiple back-blowing holes are opened at the bottom of the arc-shaped back-blowing rod 23.

[0041] The top of the extended shell 11 is provided with an arc-shaped receiving groove 15, and the arc-shaped back-blowing rod 23 can slide into the arc-shaped receiving groove 15.

[0042] During implementation, the slurry can be conveyed from the feed inlet 14 to the buffer chamber 12. At this time, the slurry can be temporarily stored in the buffer chamber 12 and will not enter the outer shell 1 immediately. This allows the amount of slurry in the buffer chamber 12 to fluctuate within a range that maintains the orderly operation of the dewatering process. This avoids the impact of fluctuations in the slurry feed flow rate on the subsequent dewatering process. Subsequently, as the conveying shaft 41 rotates, the slurry can be conveyed to the filter cylinder 22 under the action of the spiral blades. At this time, the water in the slurry can effectively flow through the filter cylinder 22, thereby achieving the reduction of the slurry volume. When the slurry is conveyed out of the filter cylinder 22, that is, when the slurry is conveyed to the first slip ring 21, the slurry after volume reduction can be discharged.

[0043] It should be noted that as the dewatering process proceeds, the filter cylinder 22 can be driven to rotate simultaneously, so that the area on its surface blocked by fibers is brought to the top. At this time, the arc-shaped back-blowing rod 23 is activated to back-blow the filter cylinder 22. The high-pressure airflow will instantly blow off the blocked fibers, so that the filter cylinder 22 can be restored to permeability. This cycle is repeated to ensure that the filter cylinder 22 always maintains a good filtration effect, thereby ensuring that the water in the slurry can be effectively removed.

[0044] In other words, the design of "rotating filter cartridge" and "top arc-shaped backflushing" constitutes an online self-cleaning system. The rotating filter cartridge 22 continuously transports any clogged area to the top cleaning area, where the large-area arc-shaped backflushing bar 23 performs efficient pulse cleaning, ensuring that the equipment can operate continuously, stably, and for a long time, greatly reducing downtime for maintenance.

[0045] In this embodiment, the spiral blade 42 is a continuously variable pitch blade, which is divided into three segments with linearly decreasing pitch from the feed end to the discharge end. These segments are gravity dewatering blade 421, flexible dewatering blade 422, and flexible compaction blade 423.

[0046] Specifically, the gravity dewatering section blades 421 are mainly used to transport the slurry. During the transport process, the free water in the slurry will pass through the filter cylinder 22 by its own gravity. The flexible dewatering section blades 422 can appropriately squeeze and agitate the slurry to remove the capillary water in the slurry. The flexible compaction section blades 423 are used to finally condition and shape the slurry. Through multi-stage dewatering, the slurry is reduced in volume during the transport process.

[0047] In other words, by designing a three-section variable pitch helical blade, a gentle pressure gradient is formed from loose to tight and from fast to slow. This "gradual extrusion" consumes less energy than "abrupt high pressure" and can significantly reduce shearing and damage to the confined material.

[0048] In this embodiment, a plurality of hydraulic telescopic rods 16 are fixedly provided at the discharge end of the outer shell 1. The output end of the hydraulic telescopic rod 16 is fixedly connected to the second slip ring 31 and is used to drive the second slip ring 31 to slide. There is a gap between the second slip ring 31 and the first slip ring 21 and they are fixedly connected by a plurality of connecting rods 33.

[0049] In this embodiment, the partition plate 32 is annular, and its inner side is slidably and sealed along the conveying shaft 41. The partition plate 32 is provided with a contoured through hole 321 that matches the cross-sectional shape of the flexible compaction section blade 423. The contoured through hole 321 is fitted with sliding cavities on both sides of the flexible compaction section blade 423. A sealing block 322 is slidably and sealed in the sliding cavity, and the sealing block 322 is slidably and sealed to the flexible compaction section blade 423.

[0050] In practice, the second slip ring 31 can be driven to slide by the hydraulic telescopic rod 16, which can also drive the first slip ring 21 to slide together, so that the filter cylinder 22 slides together, thereby changing the position of the gap between the first slip ring 21 and the second slip ring 31, that is, the position of the discharge gap. The second slip ring 31 only slides in the flexible compaction section, that is, changing the length of the flexible compaction section, thereby changing the slurry concentration of the final product.

[0051] Specifically, when the second slip ring 31 slides toward the discharge end of the outer shell 1, the length of the flexible compaction section increases, which in turn increases the compression time of the slurry, resulting in a drier discharge. Conversely, when the second slip ring 31 slides toward the feed end of the outer shell 1, the discharge is wetter. This method of control from the "process root" is more responsive, more linear in control, and has a wider adjustment range than the traditional method of only adjusting the end back pressure, thus meeting the precise requirements of different processes for the dryness of the discharge.

[0052] In this embodiment, a guide block 323 is fixedly provided on the sealing block 322;

[0053] A sealing cavity 324 is provided in the sliding cavity, the guide block 323 is slidably disposed along the sealing cavity 324, and the sealing cavity 324 is filled with compressed gas.

[0054] In other words, in order to achieve dynamic sealing between the partition 32 and the flexible compaction section blade 423, a sealing block 322 that can slide inside the sliding cavity on both sides of the contoured through hole 321 is provided. The sealing block 322 slides with a sealed cavity 324 through the guide block 323 on its back. The sealed cavity 324 is filled with compressed gas. The gas pressure continuously pushes the sealing block 322 toward the rotating flexible compaction section blade 423, forming an adaptive high-pressure contact seal. This ensures that when the second slip ring 31 pushes the partition 32 to slide, that is, changes the actual working length of the flexible compaction section blade 423, the slurry will not pass through the partition 32, and the partition can effectively apply back pressure to the slurry. Thus, different discharge concentrations can be adjusted according to specific working needs to adapt to different processing requirements.

[0055] In this embodiment, the feeding shaft 41 extends into an extension shaft on the side near the feed end. The extension shaft is located in the buffer cavity 12. Multiple spirally arranged rotating shafts are fixed radially on the extension shaft, and a stirring rod 43 is rotatably mounted on the rotating shaft.

[0056] Specifically, the stirring rod 43 is configured to stir the slurry in the buffer chamber 12, preventing the slurry from settling and affecting the subsequent dewatering process. Furthermore, the stirring rod 43 is rotatable, and during the stirring process, its rotation can effectively prevent fibers in the slurry from getting entangled on it, thus avoiding blockage.

[0057] In other words, the buffer chamber 12 and the stirring rod 43 on the extension shaft constitute an "intelligent buffer unit". The buffer chamber 12 can effectively absorb the fluctuation of the feed flow rate, and the stirring rod 43 can gently stir to prevent fiber sedimentation and bridging, ensuring that the material in the water inlet dewatering section remains stable in terms of flow rate and concentration, thereby creating ideal working conditions for subsequent volume reduction treatment and ensuring the uniformity of the final output quality.

[0058] In this embodiment, a driving cavity 17 is provided on one side of the extension shell 11. The driving cavity 17 is connected to the receiving cavity 13. A toothed rod 18 is rotatably provided in the driving cavity 17.

[0059] A toothed ring 24 is fixedly provided on the side of the filter cylinder 22 near the extension shell 11, and the toothed rod 18 is engaged with the toothed ring 24.

[0060] In addition, the rack 18 is driven by a second motor connected to the outside of the extension shell 11. The second motor drives the rack 18 to rotate, which in turn drives the filter cylinder 22 to rotate. Since the rack 18 itself has length, when the filter cylinder 22 slides along the receiving cavity 13, the rack 18 always meshes with the gear ring 24 and drives the filter cylinder 22 to rotate.

[0061] In this embodiment, a discharge port 19 is provided at the bottom of the outer shell 1;

[0062] A baffle 211 is fixedly provided on the first slip ring 21. The baffle 211 is slidably disposed along the discharge port 19 and divides the discharge port 19 into a drain port located on one side of the filter cylinder 22 and a feed port located on one side of the partition 32.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A material reduction screw conveyor integrated system, characterized in that, include: The outer shell (1) has an extension shell (11) fixedly provided in its feeding section. The extension shell (11) has a buffer cavity (12) formed inside, and an annular receiving cavity (13) is opened on the outer side of the extension shell (11). The extension shell (11) is provided with a feeding port (14) communicating with the buffer cavity (12). The filter cartridge mechanism (2) includes a first slip ring (21) and a filter cartridge (22). The first slip ring (21) is sealed and slidably disposed in the outer shell (1). One end of the filter cartridge (22) is sealed and rotatably sleeved inside the first slip ring (21), and the other end is slidably stored in the receiving cavity (13). The partition mechanism (3) includes a second slip ring (31) and a partition (32). The second slip ring (31) is slidably disposed in the outer shell (1), and the partition (32) is rotatably sleeved on the inner side of the second slip ring (31). The spiral conveying mechanism (4) includes a conveying shaft (41) and a spiral blade (42). The conveying shaft (41) is rotatably disposed in the outer casing (1), and the spiral blade (42) is fixedly disposed on the conveying shaft (41) and located inside the filter cylinder (22). The spiral blade (42) is a continuously variable pitch blade, which is divided into three sections with linearly decreasing pitch from the feed end to the discharge end. These are gravity dewatering section blade (421), flexible dewatering section blade (422), and flexible compaction section blade (423). The partition plate (32) is annular, and its inner side is sealed and slidably disposed along the conveying shaft (41). The partition plate (32) is provided with a contoured through hole (321) that matches the cross-sectional shape of the flexible compaction section blade (423). The contoured through hole (321) is fitted with sliding cavities on both sides of the flexible compaction section blade (423). A sealing block (322) is sealed and slidably disposed in the sliding cavity. The sealing block (322) is sealed and slidably fitted with the flexible compaction section blade (423). The discharge end of the outer shell (1) is fixedly provided with a plurality of hydraulic telescopic rods (16). The output end of the hydraulic telescopic rods (16) is fixedly connected to the second slip ring (31) and is used to drive the second slip ring (31) to slide. There is a gap between the second slip ring (31) and the first slip ring (21) and they are fixedly connected by a plurality of connecting rods (33). A guide block (323) is fixedly provided on the sealing block (322); A sealing cavity (324) is provided in the sliding cavity, the guide block (323) is slidably disposed along the sealing cavity (324), and the sealing cavity (324) is filled with compressed gas; The bottom of the outer shell (1) is provided with a discharge port (19), and a baffle (211) is fixedly provided on the first slip ring (21). The baffle (211) is sealed and slidably arranged along the discharge port (19) and divides the discharge port (19) into a drain port located on one side of the filter cylinder (22) and a feed port located on one side of the partition (32).

2. The material reduction screw conveyor integrated system according to claim 1, characterized in that, An arc-shaped back-blowing rod (23) is fixedly provided on the first slip ring (21) along the material conveying direction of the outer shell (1). The arc-shaped back-blowing rod (23) is located in the top area of ​​the filter cylinder (22), and multiple back-blowing holes are opened at the bottom of the arc-shaped back-blowing rod (23). The top of the extended shell (11) is provided with an arc-shaped receiving groove (15), and the arc-shaped back blow rod (23) can slide into the arc-shaped receiving groove (15).

3. The material reduction screw conveyor integrated system according to claim 1, characterized in that, The feeding shaft (41) has an extension shaft extending from the side near the feed end. The extension shaft is located in the buffer chamber (12). Multiple spirally arranged rotating shafts are fixed on the extension shaft in the radial direction. A stirring rod (43) is rotatably mounted on the rotating shaft.

4. The material reduction screw conveyor integrated system according to claim 1, characterized in that, A drive cavity (17) is provided on one side of the extended shell (11), the drive cavity (17) is connected to the receiving cavity (13), and a gear (18) is rotatably provided in the drive cavity (17); A toothed ring (24) is fixedly provided on the side of the filter cylinder (22) near the extension shell (11), and the toothed rod (18) is engaged with the toothed ring (24) in a transmission.

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