An anti-clogging multi-layer rotary screen

Abstract

The utility model relates to the technical field of powder industry, specifically, an anti-clogging multi-layer rotary screen, including a frame and a rotary screen body arranged on the frame, the rotary screen body including a sealed shell, a main grate cage and at least one screening mechanism, the sealed shell is fixedly arranged on the frame, the screening structure includes a truncated cone grate cage and an annular plate arranged on the inner side of the truncated cone grate cage and having the same inclination direction as the truncated cone grate cage, the main grate cage and the truncated cone grate cage are arranged from inside to outside and rotate synchronously in the sealed shell, there are gaps between the main grate cage and the inner wall of the sealed shell, and between the truncated cone grate cage and the inner wall of the sealed shell; a feed hopper and a material receiving dustpan are arranged on the sealed shell, the main grate cage and the feed hopper are connected, and the annular plate and the truncated cone grate cage are connected to the material receiving dustpan. The anti-clogging multi-layer rotary screen of the utility model has improved sorting efficiency and sorting accuracy, and is not easy to be blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of powder industry, in particular to an anti-clogging multi-layer rotary screen. Background Art

[0002] Material screening is an indispensable process in industrial production and the fields of construction and building materials. Screening devices are usually used for material screening, and the most common screening devices are rotary screens and vibrating screens. The structural composition of the rotary screen is also called a drum screen. It is different from the common cylindrical screen. The general cylindrical screen has a single-layer screen, while the rotary screen is a double-layer screen. Traditional screening devices (such as linear vibrating screens and axially inclined rotary screens) are mostly large in size, noisy, dusty, and energy-intensive. Not only are they inefficient, but their screening effects also fail to meet high standards (set material usage requirements). Therefore, there is an urgent need for an anti-clogging multi-layer rotary screen to solve the above problems. Utility Model Content

[0003] In order to solve the technical problems that traditional screening devices have the shortcomings of large size, high noise, large dust, high energy consumption, and the screening effect does not meet the requirements, the utility model provides an anti-clogging multi-layer rotary screen, which has improved sorting efficiency and sorting accuracy and is not easy to clog.

[0004] The utility model provides an anti-clogging multi-layer rotary screen, comprising a frame and a rotary screen body arranged on the frame, the rotary screen body comprising a sealed shell, a main grate cage and at least one sub-screening mechanism, the sealed shell is fixedly arranged on the frame, the sub-screening mechanism comprises a truncated cone grate cage and an annular plate arranged on the inner side of the truncated cone grate cage and having the same inclination direction as the truncated cone grate cage, the main grate cage and the truncated cone grate cage are arranged at intervals from the inside to the outside and are synchronously rotated in the sealed shell, there are gaps between the main grate cage and the inner wall of the sealed shell, and between the truncated cone grate cage and the inner wall of the sealed shell; a feeding hopper and a material receiving dustpan are arranged on the sealed shell, the main grate cage is connected to the feeding hopper, and the annular plate and the truncated cone grate cage are connected to the material receiving dustpan.

[0005] Furthermore, the rotary screen body also includes a rotating side plate, which is rotatably arranged in the sealed shell and contacts the inner wall of the sealed shell, the right ends of the main grate cage and the truncated cone grate cage are fixedly connected to the rotating side plate, and support ribs are fixedly connected between the left ends of the main grate cage and the truncated cone grate cage, and the two ends of the annular plate are respectively fixedly connected to the right end of the main grate cage and the support ribs; there are gaps between the right end of the main grate cage and the rotating side plate, and between the left end of the truncated cone grate cage and the support ribs.

[0006] Furthermore, the main grate cage and the truncated cone-shaped grate cage are both provided with a stepped structure.

[0007] Furthermore, a plurality of spoke retaining rings are arranged outside the main grate cage, and the plurality of spoke retaining rings are all located at the stepped structure of the main grate cage. The arrangement of the spoke retaining rings prevents material splashing and further improves the sorting accuracy.

[0008] Furthermore, the support rib is provided with a feed bell mouth with a structure that is narrow on the left and wide on the right, and the two ends of the feed bell mouth are respectively communicated with the discharge port of the feed hopper and the left end of the main grate cage; the sealed shell is provided with two material receiving dustpans, and the support rib is provided with two first discharge bell mouths with a structure that is wide on the left and narrow on the right, and the two ends of one of the first discharge bell mouths are respectively communicated with one of the material receiving dustpans and the left end of the annular plate, and the two ends of the other first discharge bell mouth are respectively communicated with the other material receiving dustpan and the left end of the truncated cone-shaped grate cage, and the bottom wall of the sealed shell is inclined.

[0009] Furthermore, a transmission shaft is rotatably arranged on the frame, a driving motor is arranged on the frame, an output shaft of the driving motor is fixedly connected to the transmission shaft and can drive it to rotate, a middle part of the transmission shaft passes through the inside of the sealed shell and the inside of the main grate cage, and the rotating side plate is fixedly connected to the transmission shaft.

[0010] Furthermore, the frame is a U-shaped structure, and two opposite bearing seats are arranged on the top of the frame. The two ends of the transmission shaft respectively pass through the inside of the sealing shell and the inside of the main grate cage and are rotatably connected to the two bearing seats.

[0011] Furthermore, two sub-screening mechanisms are provided, the main grate cage and the two sub-screening mechanisms are spaced from the inside to the outside and are synchronously rotated in a sealed shell, and the two sub-screening mechanisms are inclined in opposite directions; the two ends of the outer annular plate are respectively fixedly connected to the left end of the inner truncated cone grate cage and the rotating side plate, and the two ends of the outer truncated cone grate cage are respectively fixedly connected to the rotating side plate and the supporting ribs, and there is a gap between the outer truncated cone grate cage and the rotating side plate; three material receiving dustpans are provided on the sealed shell, and the left end of the outer truncated cone grate cage and the two annular plates are respectively connected to the three material receiving dustpans.

[0012] Furthermore, the left end of the inner annular plate and the right end of the outer annular plate are both fixedly connected with a first material retaining ring. After the materials are sorted by the two truncated cone-shaped grate cages, due to the impact and elasticity of the materials, the materials will bounce up and move forward quickly, and they may return to the gap between the left end of the inner truncated cone-shaped grate cage and the support rib or / and the gap between the right end of the outer truncated cone-shaped grate cage and the rotating side plate, thus affecting the sorting accuracy. The setting of the first material retaining ring avoids material splashing and further improves the sorting accuracy.

[0013] Furthermore, the main grate cage and the truncated cone grate cage are both provided with grate holes, the grate holes are long strip structures, and the size of the grate holes gradually increases from bottom to top. The size of the grate holes gradually increases from bottom to top, that is, the feeding port of the grate holes is narrow and the discharging port is wide, and materials of any shape will not get stuck when passing through them.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] The main grate cage and the truncated cone-shaped grate cage of the utility model anti-clogging multi-layer rotary screen are arranged in multiple layers, which saves axial space, occupies a small area, and allows flexible adjustment of the sorting particle size. The rotary screen performs rotary continuous screening, thus achieving multi-stage screening, which not only improves the sorting efficiency and sorting accuracy, but also is not easy to be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an anti-clogging multi-layer rotary screen of the utility model. Figure 1 ;

[0017] Figure 2 The utility model Figure 1 The structure of A Figure 2 ;

[0018] Figure 3 The utility model Figure 1 The structure of B Figure 3 ;

[0019] Figure 4 The utility model Figure 1 The structure of C Figure 4 ;

[0020] Figure 5 The utility model Figure 1 The structure of D Figure 5 ;

[0021] Figure 6 The utility model Figure 1 Schematic diagram of the structure of the middle grate hole 6;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the anti-clogging multi-layer rotary screen of the utility model. Figure 7 ;

[0023] Figure 8 This is a schematic diagram of the structure of the grate hole of the utility model Figure 8 ;

[0024] The reference numerals in the accompanying drawings are:

[0025] 1. Frame; 11. Bearing seat; 12. Support ribs; 13. First material retaining ring; 14. Feed bell mouth; 15. First material discharge bell mouth; 16. Second material discharge bell mouth;

[0026] 2. Driving motor; 21. Transmission shaft;

[0027] 3. Sealed shell; 31. Feed hopper; 32. Material receiving dustpan;

[0028] 4. Rotate the side panels;

[0029] 5. Main grate cage; 51. Spoke retaining ring; 52. Grate hole;

[0030] 6. Ring plate;

[0031] 7. Truncated cone shaped grate cage. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figures 1 to 8 As shown, an anti-clogging multi-layer rotary screen comprises a frame 1 and a rotary screen body arranged on the frame 1, the rotary screen body comprises a sealed shell 3, a main grate cage 5 and at least one sub-screening mechanism, the sealed shell 3 is fixedly arranged on the frame 1, and the sealed shell 3 realizes a fully sealed screening operation, without pollution, dust and low noise, the sub-screening mechanism comprises a truncated cone grate cage 7 and an annular plate 6 arranged on the inner side of the truncated cone grate cage 7 and having the same inclination direction as the truncated cone grate cage 7, the main grate cage 5 and the truncated cone grate cage 7 are arranged at intervals from the inside to the outside and are synchronously rotated in the sealed shell 3, there are gaps between the main grate cage 5 and the inner wall of the sealed shell 3, and between the truncated cone grate cage 7 and the inner wall of the sealed shell 3; a feed hopper 31 and a material receiving dustpan 32 are arranged on the sealed shell 3, the main grate cage 5 and the feed hopper 31 are connected, and the annular plate 6 and the truncated cone grate cage 7 are both connected with two material receiving dustpans 32. The anti-clogging multi-layer rotary screen of this embodiment can be used for particle sorting of bulk, granular, dry and semi-wet materials. The anti-clogging multi-layer rotary screen of this embodiment is mainly used for screening metal and non-metallic particles, such as mill steel balls, limestone block materials, etc.

[0034] If only one screening mechanism is provided, when the material is screened by the main grate cage 5 and the truncated cone grate cage 7 of the structure in this embodiment, it is not easy to get clogged. Block material (e.g., mill steel balls) sorting process: The block material enters the main grate cage 5 through the feed hopper 31 and falls onto the main grate cage 5, and the rotating side plate 4 rotates, thereby driving the main grate cage 5, the annular plate 6 and the truncated cone grate cage 7 to rotate together.

[0035] The materials are quickly sorted on the main grate cage 5, and the small-sized materials fall onto the annular plate 6, and finally fall into one of the material receiving dustpans 32 through the annular plate 6 to achieve discharge. The remaining materials fall into the gap between the annular plate 6 and the truncated cone grate cage 7 through the gap between the right end of the main grate cage 5 and the rotating side plate 4, and finally fall onto the bottom wall of the sealed housing 3 through the gap between the truncated cone grate cage 7 and the gap between the truncated cone grate cage 7 and the supporting ribs 12, and finally achieve discharge through another material receiving dustpan 32.

[0036] Because the anti-clogging multi-layer rotary screen of this embodiment performs rotary continuous screening, multi-stage screening can be achieved. Not only are the sorting efficiency and sorting accuracy improved, but it is also less prone to clogging. It can achieve continuous operation without vibration, low energy consumption for rotary motion, and is environmentally friendly. It can also adapt to most bulk material screening operations and has strong versatility. The anti-clogging multi-layer rotary screen of this embodiment has the advantages of high sorting efficiency and sorting accuracy, no clogging, small footprint, low environmental pollution, and adaptability to a wide range of materials. It effectively solves the production defects of traditional screening devices in the material screening process, such as high energy consumption and high environmental pollution.

[0037] As an implementable embodiment, the rotary screen body also includes a rotating side plate 4, which is rotatably arranged in the sealed shell 3 and contacts the inner wall of the sealed shell 3, the right ends of the main grate cage 5 and the truncated cone grate cage 7 are fixedly connected to the rotating side plate 4, and a supporting rib 12 is fixedly connected between the left ends of the main grate cage 5 and the truncated cone grate cage 7, and the two ends of the annular plate 6 are respectively fixedly connected to the right end of the main grate cage 5 and the supporting rib 12; there are gaps between the right end of the main grate cage 5 and the rotating side plate 4, and between the left end of the truncated cone grate cage 7 and the supporting rib 12.

[0038] As an implementation method, the main grate cage 5 and the truncated cone grate cage 7 are both provided with a stepped structure. Figure 1 There is no transverse blocking structure at the overlapping parts of the step structure of the main grate cage 5 and the step structure of the truncated cone grate cage 7, and there is no reinforcing member in the middle of the main grate cage 5, which effectively avoids the blockage of materials. After the step structure is set, the structural strength of the main grate cage 5 and the truncated cone grate cage 7 is improved, and the main grate cage 5 and the truncated cone grate cage 7 are prevented from being blocked by materials.

[0039] As an implementable embodiment, a plurality of spoke retaining rings 51 are provided on the outside of the main grate cage 5, and the plurality of spoke retaining rings 51 are all located at the stepped structure of the main grate cage 5. After the materials are quickly sorted on the main grate cage 5, due to the impact and elasticity of the materials, the small-sized materials will bounce up and move forward quickly, and they may return to the main grate cage 5 and affect the sorting accuracy. The provision of the spoke retaining ring 51 prevents material splashing and further improves the sorting accuracy. With the center line of the rotating side plate 4 as the axis, the main grate cage 5 of this embodiment is composed of annular grate plates that are fixedly connected and increase in size from left to right. The spoke retaining ring 51 of this embodiment is fixedly connected between two adjacent annular grate plates, and the spoke retaining ring 51 also plays a connecting and fixing role.

[0040] As an implementation method, the support rib 12 is provided with a feeding bell mouth 14 with a narrow left and wide right structure, and the two ends of the feeding bell mouth 14 are respectively connected with the feeding port of the feeding hopper 31 and the left end of the main grate cage 5. The bulk material enters the main grate cage 5 through the feeding hopper 31 and the feeding bell mouth 14, and finally falls on the main grate cage 5.

[0041] As an operative embodiment, two material receiving dustpans 2 are provided on the sealed housing 3, and two first discharge bell mouths 15 are provided on the support ribs 12, both of which are wide on the left and narrow on the right. The two ends of one of the first discharge bell mouths 15 are respectively connected to one of the material receiving dustpans 32 and the left end of the annular plate 6, and the two ends of the other first discharge bell mouth 15 are respectively connected to another material receiving dustpan 32 and the left end of the truncated cone-shaped grate cage 7, and the bottom wall of the sealed housing 3 is inclined. After the main grate cage 5 is sorted, the small-sized materials fall onto the annular plate 6, and finally fall into one of the material receiving dustpans 32 through the annular plate 6 and one of the first discharge bell mouths 15 to realize discharge.

[0042] The remaining material falls between the annular plate 6 and the truncated cone grate cage 7 through the gap between the right end of the main grate cage 5 and the rotating side plate 4, and the remaining material is sorted by the truncated cone grate cage 7, and the remaining material continues to fall onto the bottom wall of the sealing shell 3 through the gap between the left end of the truncated cone grate cage 7 and the supporting rib 12. Since the bottom wall of the sealing shell 3 is inclined, the material is finally discharged through another first discharge bell mouth 15 and another material receiving dustpan 32.

[0043] As an implementable embodiment, the main grate cage 5 and the truncated cone grate cage 7 are both provided with grate holes 52, and the grate holes 52 are long strip structures, and the size of the grate holes 52 gradually increases from bottom to top, that is, the feed port of the grate holes 52 is narrow and the discharge port is wide, and materials of any shape will not get stuck when passing through them. Among them, the width of the grate holes 52 is flexibly designed according to the characteristics of the materials and the sorting requirements. The grate holes 52 adopt this design method, which can further make the materials pass evenly without clogging.

[0044] As an implementation method, a transmission shaft 21 is rotatably provided on the frame 1, a driving motor 2 is provided on the frame 1, the output shaft of the driving motor 2 is fixedly connected to the transmission shaft 21 and can drive it to rotate, the middle part of the transmission shaft 21 passes through the inside of the sealed shell 3 and the inside of the main grate cage 5, and the rotating side plate 4 is fixedly connected to the transmission shaft 21. The driving motor 2 is started, driving the transmission shaft 21 to rotate, and then driving the rotating side plate 4, and finally realizing the rotation of the main grate cage 5, the annular plate 6 and the truncated cone-shaped grate cage 7. Among them, the frame 1 is a U-shaped structure, and two opposite bearing seats 11 are provided on the top of the frame 1, and the two ends of the transmission shaft 21 pass through the inside of the sealed shell 3 and the inside of the main grate cage 5 respectively and are rotatably connected to the two bearing seats 11.

[0045] As an implementable embodiment, two sub-screening mechanisms are provided, the main grate cage 5 and the two sub-screening mechanisms are spaced from the inside to the outside and are synchronously rotated in the sealed shell 3, and the two sub-screening mechanisms are inclined in opposite directions; the inner annular plate 6 and the inner frustoconical grate cage 7 are a left-wide and right-narrow structure, and the outer annular plate 6 and the outer frustoconical grate cage 7 are a left-narrow and right-wide structure.

[0046] The two ends of the outer annular plate 6 are respectively fixedly connected to the left end of the inner truncated cone grate cage 7 and the rotating side plate 4, and the two ends of the outer truncated cone grate cage 7 are respectively fixedly connected to the rotating side plate 4 and the supporting ribs 12, and there is a gap between the outer truncated cone grate cage 7 and the rotating side plate 4; three material receiving dustpans 32 are arranged on the sealed shell 3, and the left end of the outer truncated cone grate cage 7 and the two annular plates 6 are respectively connected to the three material receiving dustpans 32.

[0047] See also Figure 1 The main grate cage 5 and the two truncated cone grate cages 7 are arranged in multiple layers to save axial space and flexibly adjust the particle size. The truncated cone grate cage 7 of this structure is in an inclined state, and its angle can be flexibly adjusted to adapt to different materials; wherein, the width of the left and right ends of the truncated cone grate cage 7 determines its inclination angle. The inclination angles of the main grate cage 5 and the truncated cone grate cage 7 of this embodiment can be arranged arbitrarily from 0.5° to 60°, and the material adaptability is extremely strong.

[0048] Specifically, the right ends of the main grate cage 5 and the two truncated cone-shaped grate cages 7 are fixedly connected to the rotating side plate 4 (the main grate cage 5 and the two truncated cone-shaped grate cages 7 can be welded or bolted to the rotating side plate 4), and the left ends of the main grate cage 5 and the two truncated cone-shaped grate cages 7 are fixedly connected with support ribs 12, that is, the two ends of the main grate cage 5 and the two truncated cone-shaped grate cages 7 are fixedly connected to the rotating side plate 4 and the support ribs 12 to maintain stability.

[0049] The two ends of the inner annular plate 6 are respectively fixedly connected to the right end of the main grate cage 5 and the support rib 12, and the two ends of the outer annular plate 6 are respectively fixedly connected to the left end of the inner truncated cone grate cage 7 and the rotating side plate 4. There are gaps between the right end of the main grate cage 5 and the rotating side plate 4, between the left end of the inner truncated cone grate cage 7 and the support rib 12, and between the right end of the outer truncated cone grate cage 7 and the rotating side plate 4.

[0050] A feed hopper 31 is provided in the middle of the sealed shell 3, and three material receiving dustpans 32 are provided at the bottom. The left end of the main grate cage 5 is connected to the feed hopper 31, and the left end of the outer truncated cone grate cage 7, the left end of the inner annular plate 6, and the right end of the outer annular plate 6 are respectively connected to the three material receiving dustpans 32.

[0051] It is worth noting that the number of sub-screening mechanisms is not limited, that is, the number of annular plates 6 and truncated cone-shaped grate cages 7 is not limited, and a multi-layer arrangement can be adopted. When multiple annular plates 6 and truncated cone-shaped grate cages 7 are set, their respective sizes should be changed accordingly. And each annular plate 6 must be connected to a material receiving dustpan 32 for receiving materials. If the anti-blocking multi-layer rotary screen of this embodiment is selected according to the material, the limestone is screened by three kinds of particle size materials, the output per hour is 100 tons, and the motor only needs 2.2Kw. Among them, the material receiving dustpan 32 is an arc structure. If multiple sub-screening mechanisms are set, if there is a gap between the truncated cone-shaped grate cage 7 and the support rib 12 of the previous sub-screening mechanism, there is a gap between the truncated cone-shaped grate cage 7 and the rotating side plate 4 of the next sub-screening mechanism, and so on.

[0052] As an implementable embodiment, a second discharge bell mouth 16 with a structure that is narrow on the left and wide on the right is provided on the rotating side plate 4, and both ends of the second discharge bell mouth 16 are respectively connected to the third material receiving dustpan 32 and the right end of the outer annular plate 6.

[0053] As an implementable embodiment, the left end of the inner annular plate 6 and the right end of the outer annular plate 6 are both fixedly connected with a first retaining ring 13. Among them, the first retaining ring 13 on the inner annular plate 6 is located between the inner annular plate 6 and the inner truncated cone-shaped grate cage 7; the first retaining ring 13 on the outer annular plate 6 is located between the outer annular plate 6 and the outer truncated cone-shaped grate cage 7. After the material is sorted by the two truncated cone-shaped grate cages 7, due to the impact and elasticity of the material, the material will bounce up and move forward quickly, and it may return to the gap between the left end of the inner truncated cone-shaped grate cage 7 and the support rib 12 or / and the gap between the right end of the outer truncated cone-shaped grate cage 7 and the rotating side plate 4, thereby affecting the sorting accuracy. The setting of the first retaining ring 13 avoids material splashing and further improves the sorting accuracy.

[0054] Working process of anti-clogging multi-layer rotary screen: the driving motor 2 is started, driving the transmission shaft 21 to rotate, and then driving the rotating side plate 4, the main grate cage 5 and the two annular plates 6, and the truncated cone grate cage 7 to rotate. The block material enters the main grate cage 5 through the feed hopper 31 and the feed bell mouth 14, and finally falls on the main grate cage 5. After the main grate cage 5 is sorted, the small-sized material falls on the inner annular plate 6, and finally falls into one of the material receiving dustpans 32 through the inner annular plate 6 and one of the first discharge bell mouths 15 to realize the discharge. The remaining material falls between the inner annular plate 6 and the inner truncated cone grate cage 7 through the gap between the right end of the main grate cage 5 and the rotating side plate 4, and the remaining material is sorted by the inner truncated cone grate cage 7, and the next-smaller-sized material falls into the outer annular plate 6, and finally falls into the third material receiving dustpan 32 through the outer annular plate 6 and the second discharge bell mouth 16 to realize the discharge. The remaining material continues to fall between the outer annular plate 6 and the outer truncated cone grate cage 7 through the gap between the left end of the inner truncated cone grate cage 7 and the support rib 12. The remaining material is sorted by the outer truncated cone grate cage 7, and the large-sized material falls on the bottom wall of the sealed shell 3. Since the bottom wall of the sealed shell 3 is inclined, the material is finally discharged through another first discharge bell mouth 15 and another material receiving dustpan 32. If there is still material left at the end, and the material can pass through the gap between the right end of the outer truncated cone grate cage 7 and the rotating side plate 4, it will also fall on the bottom wall of the sealed shell 3 through the above gap, and finally discharge through another material receiving dustpan 32. However, under normal circumstances, according to the size requirements of material sorting, the general material is basically sorted after being sorted by the second truncated cone grate cage 7.

[0055] The embodiments described above are only preferred embodiments of the present invention and are only used to explain the present invention, not to limit the scope of implementation of the present invention. For those skilled in the art, other implementation methods can certainly be easily made by replacement or modification based on the technical contents disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An anti-clogging multi-layer rotary screen, comprising a frame (1) and a rotary screen body arranged on the frame (1), characterized in that: The rotary screen body comprises a sealed shell (3), a main grate cage (5) and at least one sub-screening mechanism. The sealed shell (3) is fixedly arranged on a frame (1). The sub-screening mechanism comprises a truncated cone-shaped grate cage (7) and an annular plate (6) arranged on the inner side of the truncated cone-shaped grate cage (7) and having the same inclination direction as the truncated cone-shaped grate cage (7). The main grate cage (5) and the truncated cone-shaped grate cage (7) are arranged from the inside to the outside and are arranged in a synchronously rotating manner in the sealed shell (3). There are gaps between the main grate cage (5) and the inner wall of the sealed shell (3), and between the truncated cone-shaped grate cage (7) and the inner wall of the sealed shell (3). A feed hopper (31) and a material receiving dustpan (32) are arranged on the sealed shell (3). The main grate cage (5) and the feed hopper (31) are connected. The annular plate (6) and the truncated cone-shaped grate cage (7) are both connected to the material receiving dustpan (32).

2. The anti-clogging multi-layer rotary screen according to claim 1 is characterized in that: The rotary screen body further comprises a rotating side plate (4), the rotating side plate (4) being rotatably arranged in the sealing shell (3) and contacting the inner wall of the sealing shell (3); the right ends of the main grate cage (5) and the truncated cone grate cage (7) are both fixedly connected to the rotating side plate (4); a supporting rib (12) is fixedly connected between the left ends of the main grate cage (5) and the truncated cone grate cage (7); the two ends of the annular plate (6) are respectively fixedly connected to the right end of the main grate cage (5) and the supporting rib (12); and there are gaps between the right end of the main grate cage (5) and the rotating side plate (4), and between the left end of the truncated cone grate cage (7) and the supporting rib (12).

3. The anti-clogging multi-layer rotary screen according to claim 2, characterized in that: The main grate cage (5) and the truncated cone-shaped grate cage (7) are in a stepped structure.

4. The anti-clogging multi-layer rotary screen according to claim 3 is characterized in that: A plurality of spoke retaining rings (51) are arranged outside the main grate cage (5), and the plurality of spoke retaining rings (51) are all located at the stepped structure of the main grate cage (5).

5. The anti-clogging multi-layer rotary screen according to claim 2, characterized in that: The support rib (12) is provided with a feeding bell mouth (14) with a structure that is narrow on the left and wide on the right, and the two ends of the feeding bell mouth (14) are respectively communicated with the discharge port of the feeding hopper (31) and the left end of the main grate cage (5); the sealed shell (3) is provided with two material receiving dustpans (32), and the support rib (12) is provided with two first material discharging bell mouths (15) with a structure that is wide on the left and narrow on the right, wherein the two ends of one of the first material discharging bell mouths (15) are respectively communicated with one of the material receiving dustpans (32) and the left end of the annular plate (6), and the two ends of the other first material discharging bell mouth (15) are respectively communicated with the other material receiving dustpan (32) and the left end of the truncated cone-shaped grate cage (7), and the bottom wall of the sealed shell (3) is arranged in an inclined manner.

6. The anti-clogging multi-layer rotary screen according to claim 2, characterized in that: A transmission shaft (21) is rotatably disposed on the frame (1), a drive motor (2) is disposed on the frame (1), an output shaft of the drive motor (2) is fixedly connected to the transmission shaft (21) and can drive the transmission shaft (21) to rotate, a middle portion of the transmission shaft (21) passes through the interior of the sealed housing (3) and the interior of the main grate cage (5), and the rotating side plate (4) is fixedly connected to the transmission shaft (21).

7. The anti-clogging multi-layer rotary screen according to claim 6, characterized in that: The frame (1) is a U-shaped structure, and two bearing seats (11) are arranged opposite to each other on the top of the frame (1). The two ends of the transmission shaft (21) respectively pass through the interior of the sealing shell (3) and the interior of the main grate cage (5) and are rotatably connected to the two bearing seats (11).

8. The anti-clogging multi-layer rotary screen according to claim 2, characterized in that: The sub-screening mechanisms are provided with two, the main grate cage (5) and the two sub-screening mechanisms are arranged from the inside to the outside and are arranged to rotate synchronously in the sealed housing (3), and the two sub-screening mechanisms are inclined in opposite directions; the two ends of the outer annular plate (6) are respectively fixedly connected to the left end of the inner truncated cone grate cage (7) and the rotating side plate (4), the two ends of the outer truncated cone grate cage (7) are respectively fixedly connected to the rotating side plate (4) and the supporting ribs (12), and there is a gap between the outer truncated cone grate cage (7) and the rotating side plate (4); three material receiving dustpans (32) are provided on the sealed housing (3), and the left end of the outer truncated cone grate cage (7) and the two annular plates (6) are respectively connected to the three material receiving dustpans (32).

9. The anti-clogging multi-layer rotary screen according to claim 8, characterized in that: The left end of the inner annular plate (6) and the right end of the outer annular plate (6) are both fixedly connected to a first material retaining ring (13).

10. The anti-clogging multi-layer rotary screen according to claim 1, characterized in that: The main grate cage (5) and the truncated cone-shaped grate cage (7) are both provided with grate holes (52), the grate holes (52) are long strip-shaped structures, and the size of the grate holes (52) gradually increases from bottom to top.

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