Array drum screen

Abstract

The invention relates to an array drum screen, and belongs to the field of screening equipment. Comprising a body (3), a rack (2), a material distributing device (1) and a material collecting cover (8), the material distributing device (1) is arranged at the upper end of the rack (2), materials can be linearly distributed, the body (3) corresponds to a discharging port of the material distributing device (1), feeding machines (9) are arranged at the feeding end of the body (3) and correspondingly connected with the discharging port of the material distributing device (1), the body (3) is double-layer screening equipment, the material collecting cover (8) comprises a finished product collecting cover (36) and an oversize product collecting cover (37), and the finished product collecting cover (36) is connected with the oversize product collecting cover (37). A finished product belt conveyor (4) is arranged below the finished product collecting cover (36), and an oversize product belt conveyor (6) is arranged below the oversize product collecting cover (37). The device is compact in structure and low in failure rate, the screening efficiency is equivalent to that of a vibrating screen, and the capacity requirement is met. The problems that a titanium sponge drum screen is low in screening efficiency, the bright surface of titanium sponge is increased due to repeated returning and crushing of oversize products, and quality is reduced are solved.

Description

Technical Field

[0001] The invention relates to an array cylindrical screen and belongs to the field of screening equipment. Background Art

[0002] Screening is a common process in industrial production and is widely used. Generally, vibrating screens are used, which have the advantages of low cost, large output, and high short-term screening efficiency. However, the disadvantages are also obvious: extremely high noise, easy jamming of the screen holes, easy vibration cracking of the screen plates, and easy breaking of the joints. In short, the failure rate is very high and has been criticized. The drum screen has the advantages of low noise, no jamming, and low failure rate, but the disadvantages are also obvious: low screening efficiency, that is, poor screening permeability, a large amount of unscreened material in the screened material, and low hourly output. It is only suitable for small-scale screening such as sample grading.

[0003] When our titanium sponge factory produces small titanium particles, there are many burrs around the titanium particles. Currently, vibrating screens are used for classification, but it is easy to block the screen holes in a large area, and production must be stopped for cleaning, and production cannot proceed smoothly. Many manufacturers have tried to use drum screens instead of vibrating screens, but all have failed. The main reason is that under the condition of ensuring sufficient output, the screening efficiency of the drum screen is extremely low, that is, the primary screening permeability is poor, and the screened material is returned for multiple crushing, resulting in an increase in the bright surface of the titanium sponge, which reduces the quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing cylindrical screen for screening titanium sponge has low screening efficiency, and the screened material is returned for multiple crushing, which increases the bright surface of the titanium sponge and reduces the quality.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an array cylindrical screen, including a main body and a frame, and also including a dividing device and an aggregate cover, the dividing device is arranged at the upper end of the frame, and the dividing device can distribute the material in a straight line, the number of the main bodies corresponds to the number of the discharge ports of the dividing device, and each main body feed end is provided with a feeder, and the feed port of the feeder is connected to the discharge port of the dividing device; the main body is a double-layer screening equipment, the aggregate cover includes a finished product aggregate cover and an oversize aggregate cover, the finished product aggregate cover is arranged at the lower end of the main body, and a finished product belt conveyor is arranged at the lower end of the finished product aggregate cover, and the oversize aggregate cover is arranged at the discharge end of the main body, and an oversize belt conveyor is arranged at the lower end of the oversize aggregate cover.

[0006] Among them, the material distribution device in the above device includes a rotating supporting wheel, a material distribution cylinder, and a collecting hopper. The rotating supporting wheel is arranged at both ends of the material distribution cylinder and can drive the material distribution cylinder to rotate. The material distribution cylinder is inclined, and the upper end of the inclination is connected with a feeding hopper. On the inner wall of the material distribution cylinder near the feeding hopper end, a spoiler column A and a single-button spiral sheet are arranged at intervals in sequence. On the side wall of the material distribution cylinder, several circles of annularly arranged material distribution ports are arranged at intervals. The collecting hoppers are arranged at intervals along the axial direction of the material distribution cylinder below the material distribution cylinder, and each collecting hopper is correspondingly arranged below a circle of material distribution ports. The lower end outlet of the collecting hopper is the outlet of the material distribution device.

[0007] Further, in the above device, the inclination angle of the material distribution cylinder is 1° - 15°, the feeding hopper is L-shaped, one end of the feeding hopper extends into the material distribution cylinder, and the angle between the bending part and the horizontal plane is 1° - 25°. A vibration motor is arranged outside the bending part.

[0008] Further, in the above device, the spoiler column A is a rhombic columnar object and there is at least one. The pitch of the single-button spiral sheet is 3 - 15 times the maximum particle size of the material.

[0009] Further, in the above device, the material distribution port is a screw hole structure and the material distribution port can be blocked by a plug. A guide hole is arranged on the side wall of the discharging end of the material distribution cylinder. The guide hole is annularly arranged and a collecting hopper is also arranged below it.

[0010] Further, in the above device, the rotating supporting wheel includes a driving roller, a driven roller, a supporting wheel frame, and a mounting plate. The driving roller and the driven roller are arranged in parallel on the supporting wheel frame; the mounting plate is arranged in the gap between the driving roller and the driven roller and is connected with the feeding hopper; flange parts are arranged at both ends of the driving roller and the driven roller; rolling rings are respectively arranged at both ends of the material distribution cylinder, and the rolling rings are placed on the flange parts at the same-side ends of the driving roller and the driven roller. An annular groove is arranged outside the rolling ring far from the feeding hopper, and the groove is clamped on the flange parts of the driving roller and the driven roller, so that the axial position of the material distribution cylinder is fixed.

[0011] Among them, the main body in the above device includes a screening cylinder, a hollow rotating table, and a screening cage. The hollow rotating table is rotatably arranged in the middle of the frame. One end of the screening cylinder is fixedly connected with the hollow rotating table. The screening cage is arranged in the screening cylinder, and the discharging end of the feeder is placed inside the feeding end of the screening cage; the screening cylinder is inclined downward away from the hollow rotating table, and the included angle between the axis of the screening cylinder and the horizontal line is 3 - 6°.

[0012] Further, in the above device, screening holes are arranged on the side wall of the screening cylinder. The screening holes are in the shape of a conical counterbore, and the large end is located inside the screening cylinder; the total area of the screening holes is greater than 40% of the side wall area of the screening cylinder, and they are arranged circumferentially with the conical guiding surfaces of adjacent two screening holes tangent to each other, arranged horizontally with the hole pitch the same as the circumferential hole pitch, and adjacent two screening holes are staggered and evenly distributed.

[0013] Furthermore, at least one spoiler column B is provided on the inner wall of the feed end of the screen cylinder in the above device.

[0014] Furthermore, the screen cage in the above-mentioned device includes a contact ring, a connecting ring and grate bars, the contact ring and the connecting ring are arranged at intervals, the grate bars are arranged at circumferential intervals, and the two ends are respectively connected to the end faces of the contact ring and the connecting ring; the connecting end of the screen drum is connected to the hollow turntable through a flange, the connecting ring is a flange structure, and the connecting ring is located away from the end of the hollow turntable, so that the screen cage is connected to the screen drum through the connecting ring; the minimum spacing between two adjacent grate bars is greater than 1.5 times the diameter of the large end of the screen hole.

[0015] The beneficial effects of the present invention are: (1) It has a compact structure and is easy to maintain. Its screening efficiency is the same as that of a vibrating screen. Its hourly output meets production requirements. It has the advantages of absolutely no sieve hole jamming, low noise, small space occupation, and low investment. It can completely replace the vibrating screen and be used in industrial production in more occasions.

[0016] (2) The material distribution device of this structure adopts a rotary drum structure, which can obtain a linear material flow and is provided with a spoiler column and a single-buckle spiral rectification structure to break up the burr adhesion, so that the material distribution is more uniform and distributed in a straight line. The beneficial effect is that it is convenient for the subsequent compact arrangement of a large number of small cylindrical screens; (2) The single cylindrical screen of this structure adopts structural measures such as (setting guide structure for screen holes, maximizing the distribution density of screen holes, setting spoiler prisms, and configuring screen cages) to maximize the screening efficiency of the screening unit. In fact, the predetermined production capacity requirements can be met with the minimum number of cylindrical screens.

[0017] (3) After the structure of a single circular screen drum is determined, the maximum feed rate q (kg / min) corresponding to 90% screening efficiency can be determined by experiment. The design capacity of the production line is Q=q×n, where n is the number of cylindrical screens (rounded). In this way, the number of cylindrical screens can be adjusted to meet any capacity requirements. The beneficial effect is that the capacity can be completely replaced by the vibrating screen, avoiding the inherent problems of the vibrating screen, such as high noise, frequent stuck screen holes, and high failure rate.

[0018] (4) There are a large number of cylindrical screens, and the principle is not to block the material from falling from the upper row of screens. In fact, the structure can be compact in terms of space occupation, and the space occupied is small, which is equivalent to the space occupied by the original vibrating screen, and can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 The present invention Figure 1 Schematic diagram of the AA section structure.

[0021] Figure 3 It is a schematic structural diagram of the material distributing device of the present invention.

[0022] Figure 4 It is the Figure 3 schematic structural diagram of the B-B sectional view of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the rotating supporting wheel of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the sectional view of the main body of the present invention.

[0025] Figure 7 It is the Figure 6 schematic structural diagram of the C-C sectional view in the present invention.

[0026] Figure 8 It is a schematic structural diagram of the sieve holes of the present invention.

[0027] Figure 9 It is a schematic structural diagram of the arrangement of the sieve holes of the present invention.

[0028] Figure 10 It is a schematic structural diagram of the hollow rotating table of the present invention.

[0029] Figure 11 It is a schematic structural diagram of the sieve cage of the present invention.

[0030] In the figure: 1. Material distributing device; 11. Feed hopper; 12. Material distributing cylinder; 13. Rotating supporting wheel; 131. Driving roller; 132. Driven roller; 133. Mounting plate; 134. Flange part; 135. Supporting wheel frame; 14. Aggregate hopper; 15. Single buckle spiral sheet; 16. Turbulence column A; 17. Material distributing port; 18. Material guiding hole; 19. Ring gear; 2. Frame; 3. Main body; 31. Driving motor; 32. Reducer; 33. Hollow rotating table; 34. Sieve cylinder; 341. Sieve holes; 35. Sieve cage; 351. Connecting ring; 352. Grate bar; 353. Contact ring; 36. Finished product aggregate cover; 37. Oversize aggregate cover; 38. Turbulence column B; 4. Finished product belt conveyor; 5. Finished product chute; 6. Oversize belt conveyor; 7. Oversize chute; 8. Aggregate cover; 9. Feeder. Specific embodiments

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] As Figures 1 to 11As shown in the figure, an array cylindrical sieve of the present invention includes a main body 3 and a frame 2, and further includes a material distribution device 1 and an aggregate cover 8. The material distribution device 1 is arranged at the upper end of the frame 2, and the material distribution device 1 can make the materials distributed in a straight line. The number of the main bodies 3 corresponds to the number of the discharge ports of the material distribution device 1, and a feeder 9 is arranged at the feeding end of each main body 3. The feeding port of the feeder 9 is correspondingly connected to the discharge port of the material distribution device 1; the main body 3 is a double-layer screening device. The aggregate cover 8 includes a finished product aggregate cover 36 and an oversize aggregate cover 37. The finished product aggregate cover 36 is arranged at the lower end of the main body 3, and a finished product belt conveyor 4 is arranged at the lower end of the finished product aggregate cover 36. The oversize aggregate cover 37 is arranged at the discharge end of the main body 3, and an oversize belt conveyor 6 is arranged at the lower end of the oversize aggregate cover 37. Those skilled in the art can understand that the material distribution device 1 is installed at the top of the frame 2 and forms a certain angle with the horizontal plane. After passing through the material distribution device 1, the materials are basically evenly divided into several equal parts. The feeding port of the feeder 9 is connected to the discharge port of the material distribution device 1, and the feeding end of the main body 3 of the cylindrical sieve is connected to the discharge port of the feeder 9. The main body 3 of the cylindrical sieve and the feeder 9 are coaxial and are inclinedly installed on the support 2. In order to facilitate the collection of the screened materials, it is preferred that the aggregate cover 8 of the present device includes a finished product aggregate cover 36 and an oversize aggregate cover 37. Specifically, the finished product aggregate cover 36 is arranged directly below the sieve cylinder 34 of the main body 3, and the oversize aggregate cover 37 is arranged at the end of the sieve cylinder 34 of the main body 3 far from the hollow rotating table 33. This structure enables the undersize materials of the main body 3 to be collected onto the finished product belt conveyor 4 through the finished product aggregate cover 36. Preferably, a finished product chute 5 is arranged at the discharge end of the finished product belt conveyor 4, and the materials are sent to the next process through the finished product chute 5. The oversize materials of the main body 3 are collected onto the oversize belt conveyor 6 through the oversize aggregate cover 37. Preferably, an oversize chute 7 is arranged at the discharge end of the oversize belt conveyor 6, and the materials are sent to the next process through the oversize chute 7. The feeder 9 of the present device is mainly used for feeding materials for screening by the main body 3. Therefore, it is preferred that the feeder 9 can adopt a screw conveyor, a vibrating feeder, or other forms of conveying equipment such as a belt conveyor. Since the material is sponge titanium with burrs, a shaftless screw conveyor is preferably used, which has a certain flexibility and is not easily stuck. The power is 370W, the rotation speed can be adjusted by frequency conversion, and the designed production capacity is 5 Kg / min. It is preferred that the main body 3 is a double-layer screening device. And because the number of the main bodies 3 is large, they are arranged in two staggered rows up and down on the principle of not blocking the material falling of the upper row of sieve cylinders 34. Actually, the preferred row spacing can be equal to the diameter of the sieve cylinder 34 + 100 mm.

[0033] Preferably, in the above device, the material distribution device 1 includes a rotating supporting wheel 13, a material distribution cylinder 12, and a collecting hopper 14. The rotating supporting wheel 13 is arranged at both ends of the material distribution cylinder 12 and can drive the material distribution cylinder 12 to rotate. The material distribution cylinder 12 is inclined, and a feed hopper 11 is connected to the upper end of the inclination. On the inner wall of the material distribution cylinder 12 near the feed hopper 11, a flow disturbing column A 16 and a single-thread spiral blade 15 are arranged at intervals in sequence. On the side wall of the material distribution cylinder 12, a number of annularly arranged material distribution ports 17 are arranged at intervals. The collecting hoppers 14 are arranged at intervals along the axial direction of the material distribution cylinder 12 below the material distribution cylinder 12, and each collecting hopper 14 is correspondingly arranged below a circle of material distribution ports 17. The lower end outlet of the collecting hopper 14 is the outlet of the material distribution device 1. Those skilled in the art can understand that the material distribution cylinder 12 of this device is inclined, and the feed hopper 11 is arranged at the upper end of the inclination of the material distribution cylinder 12. One end of the material distribution cylinder 12 is placed on the rotating supporting wheel 13, and the other end is placed on another rotating supporting wheel 13. Moreover, a number of annularly arranged material distribution ports 17 are arranged at intervals on the side wall of the material distribution cylinder 12, that is, a number of material distribution ports 17 are arranged at intervals along the axial direction on the side wall of the material distribution cylinder 12, and each circle of material distribution ports 17 is arranged at intervals along the circumferential direction of the outer wall of the material distribution cylinder 12. And each circle of material distribution ports 17 of the material distribution cylinder 12 is connected to the corresponding collecting hopper 14 below, and the lower end outlet of the collecting hopper 14 is the outlet of the material distribution device 1. Therefore, in practice, the collecting hopper 14 should be correspondingly connected to the feed inlet of a feeder 9. Nine material distribution ports 17 are arranged at equal distances along the axial direction, and each material distribution port 17 is composed of a number of uniformly circumferentially distributed screw holes (M24). On the inner wall at the front end of the material distribution cylinder 12, a flow disturbing column 6 and a single-thread spiral blade 15 are arranged at intervals in sequence to disperse and shape the material. The pitch of the single-thread spiral blade 15 is preferably 5 times the maximum particle size of the material, that is, 100 mm.

[0034] Preferably, in the above device, the inclination angle of the material distribution cylinder 12 is 1° - 15°, the feed hopper 11 is L-shaped, one end of the feed hopper 11 extends into the material distribution cylinder 12, and the angle between the bending part and the horizontal plane is 1° - 25°, and a vibration motor is arranged outside the bending part. Those skilled in the art can understand that preferably, the inclination angle of the material distribution cylinder 12 is 1° - 15°, that is, the included angle β with the horizontal plane is 1° - 15°. In practice, the included angle β with the horizontal plane can be preferably 5°. Preferably, the feed hopper 11 is L-shaped, one end of the feed hopper 11 extends into the material distribution cylinder 12, and the bottom of the feed hopper 11, that is, the outer wall of the bending part, forms a certain included angle γ with the horizontal plane of 1° - 25°, which can be further preferably 15°, and a vibration motor (power: 120W) is arranged to prevent the material from being blocked in the feed hopper 11.

[0035] Preferably, the spoiler column A16 in the above device is a rhombic columnar object, and at least one is provided. The pitch of the single-button spiral blade 15 is 3 to 15 times the maximum particle size of the material. Those skilled in the art can understand that the spoiler column 6 of this device is a rhombic columnar object. When the sieve cylinder 34 rotates at a high speed, the materials adhered and hung due to burrs can be dispersed, which is beneficial to the subsequent material distribution process. Preferably, the number of spoiler columns A16 is at least one. In practice, the number of spoiler columns A16 can be preferably 3, which are evenly arranged along the circumference. Since too small a pitch is likely to cause material blockage, and too large a pitch cannot play a role in shaping the material flow. And the better and more uniform the material flow shaping is, the smaller the error will be during the subsequent material distribution. Therefore, the pitch of the single-button spiral blade 15 in this device is preferably 3 to 15 times the maximum particle size of the material, that is, the pitch is preferably 5 times the maximum particle size of the material, which is 100 mm.

[0036] Preferably, the material distribution port 17 in the above device is a screw hole structure, and the material distribution port 17 can be blocked by a plug. A material guiding hole 18 is provided on the side wall of the discharge end of the material distribution cylinder 12. The material guiding hole 18 is arranged in a ring shape, and a collecting hopper 14 is also provided below. Those skilled in the art can understand that in this device, the material distribution ports 17 are preferably arranged in 9 circles at equal distances along the axis, and each material distribution port 17 is composed of several screw holes (M24) evenly distributed along the circumference. According to the required feeding flow rate, the number of holes is adjusted, and the unnecessary ones are blocked with bolt plugs. In order to facilitate the discharge of the remaining materials in the material distribution cylinder 12, this device preferably has a material guiding hole 18 provided on the side wall of the discharge end of the material distribution cylinder 12. Preferably, the size of the material guiding hole 18 is significantly larger than that of the material distribution port 17. At the same time, the material guiding hole 18 is arranged in a ring shape on the outer wall of the material distribution cylinder 12, and a collecting hopper 14 is also provided below, so that the remaining materials can be collected through the corresponding collecting hopper 14 below.

[0037] Preferably, in the above device, the rotating supporting roller 13 includes a driving roller 131, a driven roller 132, a supporting roller frame 135 and a mounting plate 133. The driving roller 131 and the driven roller 132 are arranged in parallel on the supporting roller frame 135. The mounting plate 133 is arranged in the gap between the driving roller 131 and the driven roller 132 and is connected to the feed hopper 11. Flange portions 134 are provided at both ends of the driving roller 131 and the driven roller 132. Ring gears 19 are respectively provided at both ends of the material distributing cylinder 12. The ring gears 19 are placed on the flange portions 134 at the same-side ends of the driving roller 131 and the driven roller 132. An annular groove is provided on the outer side of the ring gear 19 away from the feed hopper 11. The groove is clamped on the flange portions 134 of the driving roller 131 and the driven roller 132, so that the axial position of the material distributing cylinder 12 is fixed. Those skilled in the art can understand that the structure of the rotating supporting roller 13 of this device is further optimized, specifically including a driving roller 131, a driven roller 132, a supporting roller frame 135 and a mounting plate 133, which is supported and fixed by the supporting roller frame 135, and the driving roller 131 and the driven roller 132 are respectively in contact with the material distributing cylinder 12 to realize the rotational setting of the material distributing cylinder 12. This structure uses friction to transmit power. Compared with gear or chain transmission, it has a simple structure and is convenient for maintenance. The inside of the driving roller 131 is an electric roller (with a power of 400 W and an output speed of 40 r / min). Flange portions 134 are symmetrically provided at both ends, and the hardness of the cylindrical surface after heat treatment is HRC60 to improve wear resistance. Bearings are provided inside the driven roller 132, and flange portions 134 are provided at both ends. The hardness of the cylindrical surface of the flange portion 134 after heat treatment is HRC60 to improve wear resistance. When the wear of the flange portion 134 exceeds the standard, the driving roller 131 is turned around and replaced, and then it can be used continuously, doubling the service life. The mounting plate 133 is used to fix the feed hopper 11, and the mounting plate 133 may not be provided for the rotating supporting roller 13 at the tail. At the same time, in order to facilitate the rotational setting of the material distributing cylinder 12 and the rotating supporting roller 13, this device preferably has ring gears 19 respectively provided at both ends of the material distributing cylinder 12, and an annular groove is provided on the outer side of the ring gear 19, specifically, an annular groove is provided on the outer side of the ring gear 19 at the tail, and the flange portions 134 at the same-side ends of the driving roller 131 and the driven roller 132 are clamped through the groove to prevent the axial movement of the material distributing cylinder 12, while the ring gear 19 at the head position is a cylindrical surface and is not axially restricted.

[0038] Preferably, in the above device, the body 3 includes a sieve cylinder 34, a hollow rotating table 33, and a sieve cage 35. The hollow rotating table 33 is rotatably arranged in the middle of the frame 2. One end of the sieve cylinder 34 is fixedly connected to the hollow rotating table 33. The sieve cage 35 is arranged inside the sieve cylinder 34, and the discharge end 31 of the feeder 9 is placed inside the feed end of the sieve cage 35. The sieve cylinder 34 is inclined downward away from the hollow rotating table 33, and the angle between the axis of the sieve cylinder 34 and the horizontal line is 3-6°. Those skilled in the art can understand that in existing screening equipment, before screening through, the large-sized oversize materials and the unscreened materials travel together. The large-sized oversize materials occupy the hole positions throughout the process, and the small-sized undersize materials have too few opportunities to contact the sieve holes 341, resulting in low screening efficiency. In this device, by arranging the sieve cage 35 inside the sieve cylinder 34 and placing the discharge end of the feeder 1 inside the feed port of the sieve cage 35 near the hollow rotating table 33, the materials are first preliminarily screened by the sieve cage 35 and then enter the sieve cylinder 34, achieving the purpose of hierarchical screening through the sieve cage 35. This structural setting separately diverts the materials much larger than the size of the sieve holes 341, leads them out from the sieve cage 35, does not participate in the fine screening process of the sieve cylinder 34, and does not occupy the hole positions of the small-sized materials, greatly improving the screening permeability. And a large number of experiments show that after the screening section length of the cylindrical sieve is greater than 600 mm, the increase in screening efficiency is not obvious. Therefore, when the sieve holes 341 are very dense, the stiffness of the sieve cylinder 34 is weakened, and it is not suitable to be made very long and thick, nor is it suitable to adopt the two-end support method. In this device, the hollow rotating table 33 is rotatably arranged on the frame 2, and the hollow rotating table 33 is installed on the frame 2. The feeder 1 is also installed on the frame 2 to evenly feed granular materials into the sieve cage 35. One end of the sieve cylinder 34 is connected to the hollow rotating table 33, so that the entire sieve cylinder 34 is cantilever-supported and fixed, and the sieve cylinder 34 is driven by the hollow rotating table 33. The actual preferred screening length is 600 mm, and the material of the sieve cylinder 34 is preferably aluminum alloy to reduce the mass of the sieve cylinder 34. This device preferably has the hollow rotating table 33 composed of a reducer 32 and a driving motor 31. The output shaft of the driving motor 31 is connected to the input shaft of the reducer 32. The reducer 32 is a hollow type worm and worm reducer, and the output end of the reducer 32 is connected to the sieve cylinder 34, making the hollow rotating table 33 have a high integration degree, good lubrication, and reliable operation. The actual preferred power of the driving motor 31 is preferably 200 W, and the output speed is 30 r / min. To ensure convenient discharge of materials, this device actually preferably has the sieve cylinder 34 inclined downward away from the hollow rotating table 33. And since the axes of the feeder 1 and the sieve cylinder 34 are collinear, they are both inclined downward and installed on the frame 2 at a certain angle with the horizontal plane. According to experience, any value between 3-6° is generally taken. If the angle is too large, the materials roll too fast, which is not conducive to screening through. If the angle is too small, the screening production capacity decreases. Usually, the preferred inclination angle is 4°. When actually starting the driving motor 31 of the hollow rotating table 33, the sieve cylinder 34 rotates, and the materials are first divided into undersize material A and oversize material B from the sieve cage 35. The undersize material A falls into the sieve cylinder 34 and is classified into undersize material C and oversize material D by the sieve holes 341.The finished aggregate cover 36 guides C to the downstream process, and the oversize aggregate cover 37 guides B and D to the downstream process.

[0039] Preferably, in the above device, a sieve hole 341 is provided on the side wall of the sieve cylinder 34. The sieve hole 341 is in the shape of a conical counterbore, and the large end is located inside the sieve cylinder 34. The total area of the sieve holes 341 is greater than 40% of the area of the side wall of the sieve cylinder 34, and they are arranged circumferentially with the conical guiding surfaces of adjacent two sieve holes 341 tangent to each other. Horizontally, the hole pitch is the same as the circumferential hole pitch. Adjacent two sieve holes 341 are staggered and evenly distributed. Those skilled in the art can understand that the shape of the existing sieve holes 341 is unreasonable and there is no inlet guiding. The most difficult material to sieve down is often the case where the size is close to that of the sieve holes 341. Due to the close size, the chance of the material directly falling into the sieve holes 341 is small. Therefore, it is preferred that the sieve holes 341 are in the shape of conical counterbores, and a conical guiding section is provided near the inner side of the sieve cylinder 34 for the sieve holes 341. For example, if the wall thickness of the sieve cylinder 34 is 4 mm, a 3×45° chamfer can be set as the guide. The material close to the size of the sieve holes 341 can be smoothly introduced into the sieve holes 341, improving the screening probability. When the sieve holes 341 together with the stuck material rotate to the top, they fall under the action of gravity pulling out. The conical surface is equivalent to the sieve holes 341 having a certain draft angle, and the material is easy to come out and is not easy to block the sieve holes 341. The existing sieve holes 341 are sparsely distributed, and the density of the sieve holes 341 per unit area of the sieve surface is small, resulting in not enough opportunities for the material to contact the sieve holes 341. The sieve holes 341 should be as densely arranged as possible. Circumferentially, they are arranged with the conical guiding surfaces of adjacent two holes close to being tangent as the principle. Horizontally, the hole pitch is the same as the circumferential hole pitch as the principle. Adjacent two circles of holes are staggered. The sieve holes 341 are evenly distributed on the entire sieve surface, and the area ratio of the sieve holes 341 is as large as possible. Actually, it is preferably increased to 40%. The area ratio of the sieve holes 341 of an ordinary cylindrical sieve is 20%, and that of a general vibrating sieve is >30%. If the inner diameter of the sieve cylinder 34 is 314 mm, then 52 holes are arranged circumferentially. The diameter of the sieve holes 341 is preferably 13 mm, and the axial pitch of the sieve holes 341 is set to 17 mm.

[0040] Preferably, at least one turbulence column B38 is provided on the inner wall of the feed end of the sieve cylinder 34 in the above device. Those skilled in the art can understand that during actual screening, some materials have burrs, causing small particle materials to hang on large particle materials. The burrs bite and bond with each other and are not easy to disperse, resulting in incomplete screening. Therefore, at least one turbulence column B38 is provided on the inner wall of the front section of the sieve cylinder 34 in this device to disperse the materials that are closely attached due to burrs, facilitating full screening and improving the screening efficiency. For the convenience of installation, actually one or more turbulence columns B38 can be installed in the front section sieve holes 341. Preferably, the turbulence column B38 is in the shape of a prism.

[0041] Preferably, in the above device, the screening cage 35 includes a contact ring 353, a connecting ring 351 and grid bars 352. The contact ring 353 and the connecting ring 351 are arranged at intervals. The grid bars 352 are arranged at circumferential intervals, and both ends are respectively connected to the facing end faces of the contact ring 353 and the connecting ring 351. The connecting end of the screening cylinder 34 is connected to the hollow rotating table 33 through a flange. The connecting ring 351 is a flange structure and is located at the end away from the hollow rotating table 33, so that the screening cage 35 is connected to the screening cylinder 34 through the connecting ring 351. The minimum distance between two adjacent grid bars 352 is greater than 1.5 times the large end diameter of the screen holes 341. Those skilled in the art can understand that in order to quickly divert materials of larger sizes, the structure of the screening cylinder 34 is preferably adopted in this device. Specifically, it includes a contact ring 353, a connecting ring 351 and grid bars 352. The contact ring 353 and the connecting ring 351 are arranged at intervals, the grid bars 352 are arranged at circumferential intervals, and both ends are respectively connected to the facing end faces of the contact ring 353 and the connecting ring 351. Welding fixation can be preferably adopted in practice. For the convenience of installation and fixation, the connecting end of the screening cylinder 34 is preferably connected to the hollow rotating table 33 through a flange, and the connecting ring 351 is a flange structure, so that the other end of the screening cylinder 34 can fasten the screening cage 35 through bolts with the flange, and the screening cage 35 is placed inside the screening cylinder 34. At the same time, the pre-tightening force of the thread connecting the screening cylinder 34 and the hollow rotating table 33 can directly press the contact ring 353 of the screening cage 35 on the end face of the hollow rotating table 33 to achieve sealing. In order to quickly divert materials of larger sizes and avoid interfering with the fine screening process in the screening cylinder 34, the minimum distance between two adjacent grid bars 352 in this device is preferably greater than 1.5 times the large end diameter of the screen holes 341, specifically, it can be 1.53 times or 1.54 times. In practice, the size of the grid bars 352 can be preferably 4x8x716mm. The minimum distance between the grid bars 352 is 20mm.

[0042] Embodiment of online screening of titanium sponge Process requirements: After being crushed, the particle size of titanium sponge is 0 - 25mm. It is necessary to screen out the part with a particle size less than 13mm as the finished product, and the part of the oversize material with a particle size of 13 - 25mm is returned to the upper-level crusher for continuous crushing. It is required that the one-time screening efficiency η≥90%, otherwise multiple cycles of crushing will form a bright surface, resulting in a quality decline. There are burrs around the titanium sponge, which may adhere to each other, and the screening permeability is poor. The production line requires an hourly output of 2.4 tons.

[0043] Start the power roller 131 of the rotary supporting roller 13 in advance, and then start the vibration motor on the feed hopper 11. Introduce the crushed material into the feed hopper 11. Under the action of the vibration motor, it enters the material distribution cylinder 12 along the bottom of the trough, is scattered by the turbulence columns 16, and the unstable material flow is shaped by the single-thread spiral blade 15. Under the rotational action of the inclined material distribution cylinder 12, a certain amount of material is intercepted by the material distribution ports 17 arranged at each cross-section during the straight rolling and sliding forward process of the material, and is respectively led into the feeder 9 by their respective collecting hoppers 14. Start the drive motor 31 of the hollow rotary table 33, and the sieve cylinder 34 rotates. The material is first divided into the undersize A and the oversize B from the sieve cage 35. The undersize A falls into the sieve cylinder 34 and is classified into the undersize C and the oversize D by the sieve holes 341. The finished product collecting cover 36 guides C to the next process, and the oversize collecting cover 37 guides B and D to the next process.

[0044] It should be noted that when the structural dimensions of the cylindrical sieve are determined, there will inevitably be a corresponding maximum screening efficiency η, which is only positively correlated with the feeding speed. The primary screening efficiency requirement for titanium sponge is more than 90%. In practice, the maximum screening efficiency is measured by experiments. According to the above preferred method steps, initially determine the interval (0, P) where the feeding speed (Kg / min) is located, and determine the preliminary test feeding speed according to the golden section ratio of 0.618P. If the measured screening efficiency is less than 90%, it means that the feeding is too fast. Then, take the second golden section position of 0.618×0.618×P in the interval (0, 0.618P) for the feeding amount for the second test. If the screening efficiency is still less than 90%, then search for the maximum feeding amount Mmax in the other interval (0.618×0.618×P, 0.618P) according to the same steps.

[0045] Furthermore, the system production capacity Q = Mmax×n can be calculated. In the above formula: Mmax - the maximum feeding amount corresponding to the maximum screening efficiency, measured to be about 4.5 Kg / min; n - the number of small cylindrical sieves 3, which is 9; Q - the screening production capacity of the production line, which is greater than 2.4 t / h.

Claims

1. An array cylindrical sieve, comprising a body (3) and a frame (2), characterized in that: It further includes a material distributing device (1) and an aggregate cover (8). The material distributing device (1) is arranged at the upper end of the frame (2), and the material distributing device (1) can make the materials be distributed in a straight line. The number of the bodies (3) corresponds to the number of the discharge ports of the material distributing device (1), and a feeder (9) is arranged at the feeding end of each body (3). The feeding port of the feeder (9) is correspondingly connected to the discharge port of the material distributing device (1). The body (3) is a double-layer screening device. The aggregate cover (8) includes a finished product aggregate cover (36) and an oversize aggregate cover (37). The finished product aggregate cover (36) is arranged at the lower end of the body (3), and a finished product belt conveyor (4) is arranged at the lower end of the finished product aggregate cover (36). The oversize aggregate cover (37) is arranged at the discharge end of the body (3), and an oversize aggregate belt conveyor (6) is arranged at the lower end of the oversize aggregate cover (37).

2. The array cylinder sieve according to claim 1, wherein: The material distributing device (1) includes a rotating supporting wheel (13), a material distributing cylinder (12) and an aggregate hopper (14). The rotating supporting wheel (13) is arranged at both ends of the material distributing cylinder (12) and can drive the material distributing cylinder (12) to rotate. The material distributing cylinder (12) is inclined, and the upper end of the inclination is connected with a feeding hopper (11). Turbulence columns A (16) and single-button spiral blades (15) are sequentially arranged at intervals on the inner wall of the material distributing cylinder (12) near the feeding hopper (11). A plurality of rings of distribution openings (17) arranged in a ring shape are arranged at intervals on the side wall of the material distributing cylinder (12). The aggregate hoppers (14) are arranged at intervals along the axial direction of the material distributing cylinder (12) below the material distributing cylinder (12), and each aggregate hopper (14) is correspondingly arranged below a ring of distribution openings (17). The lower outlet of the aggregate hopper (14) is the discharge port of the material distributing device (1).

3. The array cylinder sieve according to claim 2, characterized in that: The inclination angle of the material distributing cylinder (12) is 1° - 15°. The feeding hopper (11) is L-shaped. One end of the feeding hopper (11) extends into the material distributing cylinder (12), and the angle between the bending part and the horizontal plane is 1° - 25°. A vibration motor is arranged outside the bending part.

4. An array cylinder sieve according to claim 2, characterized in that: The turbulence column A (16) is a rhombic columnar object and there is at least one. The pitch of the single-button spiral blade (15) is 3 - 15 times the maximum particle size of the material.

5. The array cylindrical sieve according to claim 4, wherein: The distribution opening (17) is a screw hole structure, and the distribution opening (17) can be blocked by a plug. A guide hole (18) is arranged on the side wall of the discharge end of the material distributing cylinder (12). The guide hole (18) is arranged in a ring shape, and an aggregate hopper (14) is also arranged below it.

6. The array cylinder sieve according to claim 2, characterized in that: The rotating supporting rollers (13) include a driving roller (131), a driven roller (132), a supporting roller frame (135) and a mounting plate (133). The driving roller (131) and the driven roller (132) are arranged in parallel on the supporting roller frame (135). The mounting plate (133) is arranged in the gap between the driving roller (131) and the driven roller (132) and is connected to the feed hopper (11). Flange portions (134) are provided at both ends of the driving roller (131) and the driven roller (132). Rings (19) are respectively provided at both ends of the material distributing cylinder (12). The rings (19) are placed on the flange portions (134) at the same-side ends of the driving roller (131) and the driven roller (132). An annular groove is provided on the outer side of the ring (19) far from the feed hopper (11). The groove is clamped on the flange portions (134) of the driving roller (131) and the driven roller (132), so that the axial position of the material distributing cylinder (12) is fixed.

7. An array cylinder sieve according to claim 1, characterized in that: The main body (3) includes a sieve cylinder (34), a hollow rotating table (33) and a sieve cage (35). The hollow rotating table (33) is rotatably arranged in the middle of the frame (2). One end of the sieve cylinder (34) is fixedly connected to the hollow rotating table (33). The sieve cage (35) is arranged in the sieve cylinder (34), and the discharge end (31) of the feeder (9) is placed inside the feed end of the sieve cage (35). The sieve cylinder (34) is inclined downward away from the hollow rotating table (33), and the included angle between the axis of the sieve cylinder (34) and the horizontal line is 3 to 6°.

8. An array cylinder sieve according to claim 7, characterized in that: Sieve holes (341) are provided on the side wall of the sieve cylinder (34). The sieve holes (341) are in the shape of tapered counterbore holes, and the large ends are located inside the sieve cylinder (34). The total area of the sieve holes (341) is greater than 40% of the side wall area of the sieve cylinder (34). The sieve holes (341) are arranged circumferentially with the tapered guiding surfaces of adjacent two sieve holes (341) tangent to each other. The sieve holes (341) are arranged transversely with the hole pitch being the same as the circumferential hole pitch. Adjacent two sieve holes (341) are arranged staggeredly and evenly distributed.

9. An array cylindrical sieve according to claim 7, characterized in that: At least one turbulence column B (38) is provided on the inner wall of the feed end of the sieve cylinder (34).

10. An array cylinder sieve according to claim 7, characterized in that: The sieve cage (35) includes a contact ring (353), a connecting ring (351) and grid bars (352). The contact ring (353) and the connecting ring (351) are arranged at intervals. The grid bars (352) are arranged at circumferential intervals and are respectively connected to the facing end surfaces of the contact ring (353) and the connecting ring (351) at both ends. The connecting end of the sieve cylinder (34) is connected to the hollow rotating table (33) through a flange. The connecting ring (351) is of a flange structure and is located at the end far from the hollow rotating table (33), so that the sieve cage (35) is connected to the sieve cylinder (34) through the connecting ring (351). The minimum distance between adjacent two grid bars (352) is greater than 1.5 times the large-end diameter of the sieve holes (341).

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