Disc sieve

Abstract

The present invention discloses a disc screen. The disc screen comprises a frame of a sealed box structure, an upper sealing plate of the frame is provided with a feed port and a lower sealing plate is provided with a plurality of material distribution ports, a connecting seat is connected under the two upper end beams of the frame, a screening roller comprises a mandrel, the middle of the mandrel is a regular hexagonal main shaft section, a positioning section of the mandrel is rotatably connected to the lower surface of the connecting seat through a seat bearing, a double-row sprocket is fixed to the transmission section of the mandrel, a single-row chain is driven between the double-row sprockets, another transmission section of the outermost mandrel is connected to a reduction motor through a coupling, a plurality of regular hexagonal discs are equidistantly arranged and periodically spirally rotated at a certain angle and distributed on the main shaft section, and the disc of the previous screening roller is located in the interval between two adjacent discs of the next screening roller. The present invention has the advantages of long service life of the regular hexagonal discs, reduced downtime during maintenance, high equipment utilization, convenient installation, and good screening effect.

Description

Technical Field

[0001] The invention relates to a screening device, in particular to a disc screen. Background Art

[0002] In garbage sorting, star screens are often used to subdivide materials. The star claws, the main components of the existing star screens, are prone to material jamming and entanglement during the screening process, which can cause deformation, breakage, or even damage to the star claws. In addition, the star claws are distributed in a claw-like shape, and stress concentration is prone to occur at the bottom of the star claws, making them easily damaged and falling off, resulting in frequent replacement of the star claws, frequent machine maintenance stops, low equipment utilization, and complex star plate parts and high processing and production costs. Summary of the invention

[0003] In order to solve one or more of the above problems, the present invention provides a disc screen.

[0004] According to one aspect of the present invention, the disc screen comprises a frame of a sealed box structure and a screening roller, the upper sealing plate of the frame is provided with a feed port and the lower sealing plate is provided with a plurality of material distribution ports, and the lower ends of the two upper end beams of the frame are connected with a connecting seat.

[0005] The screening roller includes a core shaft, the middle of the core shaft is a regular hexagonal main shaft section, the two sides of the main shaft section are cylindrical positioning sections, the outer side of the positioning section is a cylindrical transmission section, the positioning section is rotatably connected to the lower surface of the connecting seat through a seat bearing, the transmission section is fixed with a double-row sprocket, the double-row sprockets are driven by a single-row chain, and the other transmission section of the outermost core shaft is connected to the reduction motor through a coupling.

[0006] Several regular hexagonal discs are equidistantly arranged and periodically spirally rotated at a certain angle on the main shaft section. The disc of the previous screening roller is located in the interval between the two adjacent discs of the next screening roller. The gap between each disc and the opposite core shaft is the size of the screened material, and the gap increases from the feed end to the back. The disc screen uses regular hexagonal discs, which have the following beneficial effects: first, the regular hexagonal discs can effectively avoid deformation and damage caused by stress concentration, reduce maintenance downtime, and improve equipment utilization, and the structure is more conducive to the advancement of large materials and the separation of fine materials; second, the spiral periodic distribution further improves the material conveying effect; third, the use of a hanging connection seat is conducive to the disassembly and maintenance of the discs; fourth, the double-row sprockets are arranged on the outermost side, which is convenient for installation and lubrication of the chain, and the discs are easy to disassemble and assemble.

[0007] Preferably, there is a threaded fastening section between the main shaft section and the positioning section, the disc is sleeved on the main shaft section, adjacent discs are axially fixed by spacers, and the threaded block is connected to the threaded fastening section, and the threaded block tightly fits the outer side of the outermost disc.

[0008] Preferably, the threaded block is two round nuts arranged side by side; a shaft head washer is also provided between the round nut and the outermost disc, and the shaft head washer can be inserted into the main shaft section.

[0009] Preferably, the spacer also includes a torus, a circular plate is connected inside the torus, a second center hole is provided at the center of the circular plate, the second center hole is a regular hexagon and has the same size as the regular hexagon of the outer contour of the main shaft segment, each second center hole is sleeved through the main shaft segment,

[0010] The diameter of the annular body is smaller than the height of the disc, and the two sides of each annular body are respectively attached to a side surface of the disc;

[0011] A positioning ring groove is respectively provided on the two side surfaces of each disc, and the positioning ring groove can accommodate the annular body. The thickness of the positioning ring groove is the same as that of the annular body, and the diameter of the positioning ring groove is the same as that of the annular body.

[0012] Preferably, the disc is a split structure, and the disc includes a first half disc and a second half disc of a semi-regular hexagonal plate, a half hole is provided at the center of the lower surface of each semi-regular hexagonal plate, and first pin holes with the same position and size and vertically downward are provided on both sides of the first half disc and the second half disc, respectively.

[0013] The first half plate has first stepped through holes on both sides thereof, and the second half plate has first threaded blind holes on both sides thereof. The first threaded blind holes are opposite to the first stepped through holes.

[0014] The second stepped through hole is processed in the center of the main plane of the first half disk and the second half disk respectively.

[0015] The positioning pin is positioned and installed in the first pin hole, and the cylindrical head screw passes through the first stepped through hole and is screwed into the first threaded blind hole, so that the first half disk and the second half disk are clamped and connected into one body to form a regular hexagonal disc.

[0016] The cylindrical head screw passes through the second stepped through hole to reinforce and fix the dish to the main shaft section or the positioning sleeve equidistantly arranged on the main shaft section.

[0017] Preferably, the core shaft is provided with a symmetrically arranged second threaded blind hole, the second threaded blind hole is opposite to the second stepped through hole, and the cylindrical head screw passes through the second stepped through hole and is screwed into the second threaded blind hole; or the positioning sleeve is provided with two symmetrically arranged main threaded holes, the main threaded hole is opposite to the second stepped through hole, and the cylindrical head screw passes through the second stepped through hole and is screwed into the main threaded hole.

[0018] Preferably, the inner cavity wall of the half hole is provided with a circumferential array of lower connecting ends, the lower connecting ends are matched with the upper positioning ends, and the circumferential array of the upper positioning ends is arranged on the main shaft section or on the positioning sleeve;

[0019] The upper positioning end is a plurality of axially arranged grooves or ridges in a circumferential array on the outer wall of the positioning sleeve or the main shaft section, and the lower connecting end is a plurality of axially arranged ridges or grooves in a circumferential array of the half hole.

[0020] Preferably, after the first half disc and the second half disc are screwed together, the second stepped through hole and the first stepped through hole are provided with a sealing cover.

[0021] Preferably, the connection between the plurality of positioning sleeves and the main shaft segment is any one of welding, threaded connection or machining of the outer wall of the main shaft segment.

[0022] Preferably, each disc rotates about the center line of the main shaft section at an angle of 15° relative to the previous disc, and every four discs are arranged in a cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view schematic diagram of a disc screen according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic top view of the disc screen shown;

[0025] Figure 3 for Figure 1 The left schematic diagram of the screening roller shown;

[0026] Figure 4 for Figure 1 A schematic front view of the screening roller shown;

[0027] Figure 5 for Figure 4 An enlarged schematic diagram of the screening roller at point A is shown;

[0028] Figure 6 for Figure 3 A schematic front view of the mandrel shown;

[0029] Figure 7 for Figure 3 A schematic left view of the mandrel shown;

[0030] Figure 8 for Figure 1 The left side schematic diagram of the screening roller using a split disc is shown;

[0031] Fig. 9 for Figure 8 A schematic diagram of the left side of the disc and the spindle shown;

[0032] Fig.10 for Fig. 9 A schematic diagram of the first half of the disk shown;

[0033] Fig.11 for Fig. 9A schematic diagram of the second half of the disk shown;

[0034] Fig.12 for Fig. 9 A schematic front view of the mandrel shown;

[0035] Fig.13 for Fig. 9 A schematic left view of the mandrel shown;

[0036] Fig.14 for Figure 8 The left side schematic diagram of the screening roller using the positioning sleeve is shown;

[0037] Fig.15 for Fig.14 The left side schematic diagram of the disc, the spindle and the positioning sleeve shown;

[0038] Fig.16 Fig. 9 A schematic front view of the mandrel shown;

[0039] Fig.17 for Fig.15 A schematic diagram of the positioning sleeve shown;

[0040] Fig.18 for Figure 1 The screening schematic diagram of the disc screen is shown;

[0041] Frame 01, connecting seat 02, double-row sprocket 04, reduction motor 05,

[0042] Screening roller 03, disc 1, half hole 10, first half disc 11, second half disc 12, lower connecting end 13, first pin hole 14, second stepped through hole 15, first stepped through hole 16, first threaded blind hole 17, positioning ring groove 18; core shaft 2, main shaft section 20, positioning section 21, transmission section 22, second threaded blind hole 23, threaded fastening section 24; spacer 3, annular body 31, circular plate 32, center hole 33, threaded block 4, shaft head washer 5, seat bearing 6, sealing cover 7, positioning pin 8, positioning sleeve 9, first center hole 91, upper positioning end 92, main threaded hole 93. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0044] Figures 1 to 18The disc screen according to one embodiment of the present invention is schematically shown. As shown in the figure, the device comprises a frame 01 of a sealed box structure and a screening roller 03. The upper sealing plate of the frame 01 is provided with a feed inlet and the lower sealing plate is provided with a plurality of material distribution ports. The two upper end beams of the frame 01 are connected to a connecting seat 02.

[0045] The screening roller 03 includes a core shaft 2, the middle of the core shaft 2 is a regular hexagonal main shaft section 20, the two sides of the main shaft section 20 are cylindrical positioning sections 21, the outer side of the positioning section 21 is a cylindrical transmission section 22, the positioning section 21 is rotatably connected to the lower surface of the connecting seat 02 through a seat bearing 6, the transmission section 22 is fixed with a double-row sprocket 04, the double-row sprocket 04 is driven by a single-row chain, and the other transmission section 22 of the outermost core shaft 2 is connected to the reduction motor 05 through a coupling.

[0046] A number of regular hexagonal discs 1 are equidistantly arranged and periodically spirally rotated at a certain angle on the main shaft section 20. The disc 1 of the previous screening roller 03 is located in the interval between two adjacent discs 1 of the next screening roller 03. The gap between each disc 1 and the opposite core shaft 2 is the size of the screened material, and the gap becomes larger from the feed end to the back.

[0047] The disc screen adopts a regular hexagonal disc 1, which has the following beneficial effects: first, the regular hexagonal disc can effectively avoid deformation and damage caused by stress concentration, reduce maintenance downtime, and improve equipment utilization, and the structure is more conducive to the advancement of large materials and the separation of fine materials; second, the spiral periodic distribution further improves the material conveying effect; third, the use of a hanging connecting seat 02 is conducive to the disassembly and maintenance of the disc 1; fourth, the double-row sprocket 04 is arranged on the outermost side, which is convenient for installation and lubrication of the chain, and the disc 1 is easy to disassemble and assemble.

[0048] Preferably, there is a threaded fastening section 24 between the main shaft section 20 and the positioning section 21, the disc 1 is inserted into the main shaft section 20, the adjacent discs 1 are axially fixed by the spacer sleeve 3, the threaded block 4 is connected to the threaded fastening section 24, and the threaded block 4 is tightly fitted to the outer side of the outermost disc 1. Its beneficial effects are: first, the end is locked with the threaded block 4, which can help avoid the misalignment caused by the cumulative error and improve the installation and matching accuracy; second, the different specifications and sizes of the disc 1 and the spacer sleeve 3 can be replaced according to the size of the screened material, realizing a universal module design; fourth, the spacer sleeve 3 can cooperate with the disc 1 to control the size of the screened material, and the annular body 31 provides a unified benchmark. At the same time, the circular plate 32 can effectively support the extrusion force of the material and transfer the pressure to the core shaft 2, effectively avoiding the stress concentration phenomenon.

[0049] Preferably, the core shaft 2 is processed into a regular hexagon, which has the following beneficial effects: when the disc 1 and the spacer 3 are driven to rotate, the six faces are evenly stressed, which increases the service life of the core shaft 2. At the same time, the hexagonal shape can make the hexagonal disc rotate at a certain angle, which is more conducive to loading and unloading.

[0050] Preferably, the thread block 4 is two round nuts arranged side by side; a shaft head washer 5 is also arranged between the round nut and the outermost disc 1, and the shaft head washer 5 can be sleeved on the main shaft section 20. The beneficial effects are: the round nut has high adjustment accuracy, which can improve the adjustment accuracy, and the two round nuts can be locked side by side. In addition, the shaft head washer 5 effectively realizes an end positioning function, and the sleeve washer 5 reduces the wear of the thread block 4 on the disc 1, improves the installation accuracy, and is quick to install.

[0051] Preferably, the height of the main shaft section 20, the diameter of the threaded fastening section 24, the diameter of the positioning section 21 and the diameter of the transmission section 22 are successively reduced. The beneficial effect is that the arrangement is convenient for positioning and installation.

[0052] Preferably, the spacer 3 includes a ring body 31, a circular plate 32 is connected inside the ring body 31, a second center hole 33 is provided at the center of the circular plate 32, the second center hole 33 is a regular hexagon and has the same size as the regular hexagon of the outer contour of the main shaft section 20, each second center hole 33 is inserted through the main shaft section 20,

[0053] The diameter of the annular body 31 is smaller than the height of the disc 1, and the two sides of each annular body 31 are respectively in contact with a side surface of the disc 1. The beneficial effect is that the arrangement can improve the installation accuracy and prevent the disc from rotating.

[0054] Preferably, each disc 1 has two side surfaces with a positioning ring groove 18, which can accommodate the annular body 31, and the positioning ring groove 18 and the annular body 31 have the same thickness, and the positioning ring groove 18 and the annular body 31 have the same diameter. The beneficial effect is that the positioning ring groove 18 can effectively improve the installation accuracy of the disc 1.

[0055] Preferably, the disc 1 is a split structure, and the disc 1 comprises a first half disc 11 and a second half disc 12 of a semi-regular hexagonal plate, a half hole 10 is provided at the center of the lower surface of each semi-regular hexagonal plate, and first pin holes 14 with the same position and size and vertically downward are provided on both sides of the first half disc 11 and the second half disc 12, respectively.

[0056] The first half plate 11 is provided with first stepped through holes 16 on both sides thereof, and the second half plate 12 is provided with first threaded blind holes 17 on both sides thereof. The first threaded blind holes 17 are opposite to the first stepped through holes 16.

[0057] The second stepped through hole 15 is processed in the center of the main plane of the first half disk 11 and the second half disk 12.

[0058] The positioning pin 8 is positioned and installed in the first pin hole 14, and the cylindrical head screw passes through the first stepped through hole 16 and is screwed into the first threaded blind hole 17, so that the first half disk 11 and the second half disk 12 are clamped and connected into one body to form a regular hexagonal dish 1. The disc screen adopts a split disc 1, and its beneficial effects are as follows: first, the disc 1 is a split structure, and the installation of the disc 1 does not require the sleeve core shaft 2. It only needs to place two half discs from the upper end and the lower end, or the left end and the right end of the core shaft 2 at two relative positions, and threaded connection, so that quick clamping can be completed. Therefore, during maintenance, only a specific disc needs to be replaced, and the entire disc assembly does not need to be removed during maintenance, and the replacement is quick and fast; second, during maintenance, only a damaged half disc needs to be replaced, which greatly reduces the strength of the equipment; third, compared with the sleeve matching, the position of each disc can be controlled by machining, avoiding frequent debugging by the debugging workers to obtain better installation accuracy, and the position level will not change after long-term use or each maintenance adjustment, and the reference does not need to be adjusted every time; fourth, screening materials of the same size can greatly increase the range of screening materials compared to the original increase in the axial positioning of the spacer sleeve. In other words, under the condition of the same material and the same core shaft 2, the size of the disc 1 can be greatly reduced, reducing the total size of the equipment and the equipment cost.

[0059] Preferably, a cylindrical head screw passes through the second stepped through hole 15 to reinforce and fix the disc 1 to the main shaft section 20 .

[0060] Preferably, the mandrel 2 is provided with a symmetrically arranged second threaded blind hole 23, the second threaded blind hole 23 and the second stepped through hole 15 are opposite, and the cylindrical head screw passes through the second stepped through hole 15 and is screwed into the second threaded blind hole 23;

[0061] Preferably, the cylindrical head screw passes through the second stepped through hole 15 to reinforce and fix the disc 1 to the main shaft section 20 or the positioning sleeve 9 equidistantly arranged on the main shaft section 20. The disc screen adopts the positioning sleeve 9 to provide a high-precision positioning reference, and its beneficial effects are: first, by adopting the positioning sleeve 9, each disc 1 has a good reference for installation, and the installation of each disc 1 does not affect each other, and the installation is highly accurate.

[0062] Preferably, the positioning sleeve 9 is provided with two symmetrically arranged main threaded holes 93 , the main threaded holes 93 are opposite to the second stepped through hole 15 , and the cylindrical head screw passes through the second stepped through hole 15 and is screwed into the main threaded hole 93 .

[0063] Preferably, the inner cavity wall of the half hole 10 is provided with a circular array of lower connecting ends 13, the lower connecting ends 13 and the upper positioning ends 92 cooperate with each other, and the upper positioning ends 92 are arranged in a circular array on the main shaft section 20 or on the positioning sleeve 9; its beneficial effect is: the disc screen adopts the pre-matching of the lower connecting end 13 and the upper positioning end 92, which greatly improves the installation accuracy.

[0064] Preferably, the upper positioning end 92 is a plurality of axially arranged grooves or ridges in a circumferential array on the outer wall of the positioning sleeve 9 or the main shaft section 20, and the lower connecting end 13 is a plurality of axially arranged ridges or grooves in a circumferential array of the half hole 10, and the grooves and ridges have the same contour and size.

[0065] Preferably, after the first half plate 11 and the second half plate 12 are screwed together, the second stepped through hole 15 and the first stepped through hole 16 are provided with a sealing cover 7. The beneficial effect is that the sealing cover 7 can prevent foreign matter from entering the threaded part and corroding the threaded part, and prevent the thread from being fixed during disassembly and assembly.

[0066] Preferably, the connection between the plurality of positioning sleeves 9 and the main shaft section 20 is any one of welding, threaded connection or machining of the outer wall of the main shaft section 20. The beneficial effect is that machining can effectively control the installation accuracy.

[0067] Preferably, the outer contour of the positioning sleeve 9 is a regular hexagon or a circle, and the half hole 10 is a semi-regular hexagonal hole or a semicircular hole.

[0068] Preferably, the rotation angle of each disc 1 relative to the previous disc 1 around the center line of the main shaft section 20 is 0-30°.

[0069] Preferably, each disc 1 rotates at an angle of 15° relative to the previous disc 1 around the center line of the main shaft section 20, and every four discs 1 are arranged in a cycle. The beneficial effect is that the spiral periodic arrangement of this setting can effectively improve the particle size and uniformity of screening.

[0070] Preferably, each disc 1 rotates 30° relative to the previous disc 1 around the center line of the main shaft section 20, and every two discs 1 form a periodic arrangement. The beneficial effect is that the spiral periodic arrangement of this arrangement can effectively improve the screening speed and capacity.

[0071] Preferably, the first half disk 11 and the second half disk 12 are made of polyurethane or steel, and the positioning sleeve 9 is made of steel. The beneficial effect is that the positioning sleeve 9 is convenient for processing and material collection.

[0072] Preferably, a plurality of star claws can be provided on the outer contour surface of the first half disc 11 and the second half disc 12. The beneficial effect is that the arrangement can be further extended to the star disc screen, because the star claws are prone to jamming and entanglement during the screening process. This causes the star claws to be deformed, broken, or even damaged. Furthermore, the star claws are distributed in a claw-like manner, and stress concentration is easily generated at the bottom of the star claws, making the star claws easily damaged and falling off, resulting in frequent replacement of the star claws. The split structure is convenient for quick replacement.

[0073] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A disc screen, characterized in that: It comprises a frame (01) of a sealed box structure and a screening roller (03), wherein the upper sealing plate of the frame (01) is provided with a feed port and the lower sealing plate is provided with a plurality of material distribution ports, and a connecting seat (02) is connected below two upper end beams of the frame (01). The screening roller (03) comprises a core shaft (2), the middle of the core shaft (2) is a regular hexagonal main shaft section (20), both sides of the main shaft section (20) are cylindrical positioning sections (21), the outer side of the positioning section (21) is a cylindrical transmission section (22), the positioning section (21) is rotatably connected to the lower surface of the connecting seat (02) via a seat bearing (6), the transmission section (22) is fixed with a double-row sprocket (04), the double-row sprockets (04) are driven by a single-row chain, and the other transmission section (22) of the outermost core shaft (2) is connected to a reduction motor (05) via a coupling. A plurality of regular hexagonal discs (1) are arranged at equal intervals and are distributed on the main shaft section (20) by periodically rotating spirally at a certain angle, the disc (1) of the preceding screening roller (03) is located in the interval between two adjacent discs (1) of the following screening roller (03), the gap between each disc (1) and the opposite core shaft (2) is the size of the screening material, and the gap becomes larger from the feed end to the rear; A threaded fastening section (24) is provided between the main shaft section (20) and the positioning section (21); the disc (1) is sleeved on the main shaft section (20); adjacent discs (1) are axially fixed via spacers (3); a threaded block (4) is connected to the threaded fastening section (24); and the threaded block (4) is tightly fitted to the outer side surface of the outermost disc (1); The spacer (3) further comprises a circular ring (31), wherein a circular plate (32) is connected inside the circular ring (31), a second center hole (33) is provided at the center of the circular plate (32), the second center hole (33) is a regular hexagon and has the same size as the regular hexagon of the outer contour of the main shaft section (20), each second center hole (33) is inserted through the main shaft section (20), the diameter of the circular ring (31) is smaller than the height of the disc (1), and both sides of each circular ring (31) are respectively in contact with a side surface of the disc (1); Each of the two side surfaces of the disc (1) is respectively provided with a positioning ring groove (18), the positioning ring groove (18) being capable of accommodating the annular body (31), the positioning ring groove (18) and the annular body (31) having the same thickness, and the positioning ring groove (18) and the annular body (31) having the same diameter; The disc (1) is a split structure, comprising a first half disc (11) and a second half disc (12) of a semi-regular hexagonal plate, a half hole (10) being provided at the center of the lower surface of each semi-regular hexagonal plate, first pin holes (14) being provided vertically downward and having the same position and size on both sides of the first half disc (11) and the second half disc (12), first stepped through holes (16) being processed on both sides of the first half disc (11), first threaded blind holes (17) being processed on the upper surfaces of both sides of the second half disc (12), the first threaded blind holes (17) being positioned opposite to the first stepped through holes (16), and second stepped through holes (15) being processed on the centers of the main planes of the first half disc (11) and the second half disc (12), The positioning pin (8) is positioned and installed in the first pin hole (14), and the cylindrical head screw passes through the first stepped through hole (16) and is screwed into the first threaded blind hole (17), so that the first half disk (11) and the second half disk (12) are clamped and connected together to form a regular hexagonal disk (1). A cylindrical head screw passes through the second stepped through hole (15) to reinforce and fix the disc (1) to the main shaft section (20) or a positioning sleeve (9) equidistantly arranged on the main shaft section (20).

2. The disc screen according to claim 1, characterized in that: The threaded block (4) is two round nuts arranged side by side; a shaft head washer (5) is also provided between the round nut and the outermost disc (1), and the shaft head washer (5) can be sleeved on the main shaft section (20).

3. The disc screen according to claim 1, characterized in that: The core shaft (2) is provided with a symmetrically arranged second threaded blind hole (23), the second threaded blind hole (23) and the second stepped through hole (15) are opposite to each other, and a cylindrical head screw passes through the second stepped through hole (15) and is screwed into the second threaded blind hole (23); or the positioning sleeve (9) is provided with two symmetrically arranged main threaded holes (93), the main threaded holes (93) and the second stepped through hole (15) are opposite to each other, and a cylindrical head screw passes through the second stepped through hole (15) and is screwed into the main threaded holes (93).

4. The disc screen according to claim 1, characterized in that: The inner cavity wall of the half hole (10) is provided with a circumferential array of lower connecting ends (13), the lower connecting ends (13) cooperate with upper positioning ends (92), and the circumferential array of upper positioning ends (92) is arranged on the main shaft section (20) or on the positioning sleeve (9); The upper positioning end (92) is a plurality of axially arranged grooves or ridges in a circumferential array on the outer wall of the positioning sleeve (9) or the main shaft section (20), and the lower connecting end (13) is a plurality of axially arranged ridges or grooves in a circumferential array of the half hole (10).

5. The disc screen according to claim 1, characterized in that: After the first half plate (11) and the second half plate (12) are screwed together, the second stepped through hole (15) and the first stepped through hole (16) are provided with a sealing cover (7).

6. The disc screen according to claim 1, characterized in that: The connection method between the plurality of positioning sleeves (9) and the main shaft section (20) is any one of welding, threaded connection or machining of the outer wall of the main shaft section (20).

7. The disc screen according to claim 1, characterized in that: The rotation angle of each disc (1) relative to the previous disc (1) around the center line of the main shaft section (20) is 15°, and every four discs (1) are arranged in a cycle.

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