CN214812420U

CN214812420U - Circulating screening type shaftless drum screen

Info

Publication number: CN214812420U
Application number: CN202121438733.5U
Authority: CN
Inventors: 陈德华
Original assignee: Shenzhen Kunpeng Environmental Protection Technology Co ltd
Current assignee: Shenzhen Kunpeng Environmental Protection Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-11-23
Anticipated expiration: 2031-06-28

Abstract

The utility model relates to a circulation screening type shaftless drum sieve belongs to the technical field of drum sieve, including base and screening net section of thick bamboo, the screening net section of thick bamboo rotates with the base to be connected, fixedly connected with screw conveyer on the base, screw conveyer's one end extends to in the screening net section of thick bamboo, rotates on the base to be connected with the conveyer belt, and the one end of conveyer belt is located the below that screw conveyer one end was kept away from to the screening net section of thick bamboo, and the one end of screening net section of thick bamboo is kept away from to the other end intercommunication screw conveyer of conveyer belt. This application has the convenience and screens the grit once more, improves the screening effect, makes the more convenient effect of screening operation.

Description

Circulating screening type shaftless drum screen

Technical Field

The application relates to the field of drum screens, in particular to a circulating screening type shaftless drum screen.

Background

In the concrete production process, sand is generally required to be screened in order to ensure the quality of concrete. The drum screen is a commonly used screening device, and can screen out finer and finer sand through the screening of the drum screen, so that the production quality of concrete can be ensured.

In the related art, reference may be made to chinese patent No. CN205110072U, which discloses a drum screen, comprising a frame, a transmission shaft is arranged in the frame, a motor is arranged on the transmission shaft, a rotating frame is arranged on the rotating shaft, two layers of screen bodies are arranged on the rotating frame, and vibrating devices are arranged on two sides of the screen bodies.

In view of the above-mentioned related technologies, the inventor believes that the drum screen inevitably has qualified sand which is not screened and is directly discharged in the screening process, and if the drum screen is re-screened, the discharged sand needs to be re-fed into the drum screen through a forklift and the like, and the operation is troublesome.

SUMMERY OF THE UTILITY MODEL

In order to carry out screening once more to grit in the convenience, improve the screening effect, make the screening operation more convenient, this application provides a circulation screening type shaftless drum sieve.

The application provides a circulating screening type shaftless drum sieve adopts following technical scheme:

the utility model provides a circulating screening type shaftless drum screen, includes base and a screening net section of thick bamboo, a screening net section of thick bamboo rotates with the base to be connected, fixedly connected with screw conveyer on the base, screw conveyer's one end extends to in the screening net section of thick bamboo, it is connected with the conveyer belt to rotate on the base, the one end of conveyer belt is located the screening net section of thick bamboo and keeps away from the below of screw conveyer one end, the other end intercommunication screw conveyer of conveyer belt keeps away from the one end of a screening net section of thick bamboo.

Through adopting above-mentioned technical scheme, the workman sends into the screen cylinder with grit from the one end that the screen cylinder is close to screw conveyer in the screen cylinder, this moment the screen cylinder rotate and remove grit to the one end of keeping away from screw conveyer, fall into on the conveyer belt after the grit falls down from the screen cylinder, the conveyer belt rotates this moment and carries the remaining grit of first screening to screw conveyer, then screw conveyer sends the grit into the screen cylinder once more and screens, improve the screening effect, it is more convenient to make the screening operation.

Optionally, the screening net drum is obliquely arranged, and the height of one end, close to the screw conveyor, of the screening net drum is greater than that of the other end of the screening net drum.

Through adopting above-mentioned technical scheme, make things convenient for the grit to fall into on the conveyer belt in the screening net section of thick bamboo.

Optionally, a plurality of screening holes are formed in the conveyor belt, and a collecting box located right below the conveyor belt is arranged on the base.

Through adopting above-mentioned technical scheme, the grit that falls into on the conveyer belt carries out the prescreening through the screening hole, and then makes the grit after the screening fall into the collection box and collect, can further guarantee the screening effect of grit.

Optionally, the base is fixedly connected with baffles positioned on two sides of the conveyor belt, the height of the top end of each baffle is larger than that of the conveyor belt, and the baffles extend along the length direction of the conveyor belt.

Through adopting above-mentioned technical scheme, the baffle can reduce the direct possibility that falls into the collection box of grit from the conveyer belt, guarantees the screening quality of grit.

Optionally, two it is connected with a plurality of dwangs to rotate between the baffle, a plurality of turning plates that can contradict with the conveyer belt have set firmly on the dwang, the circumference evenly distributed of turning plate edge dwang.

Through adopting above-mentioned technical scheme, the dwang drives and turns the board and rotate, and then turns the grit on the conveyer belt, makes the grit can fall from the screening hole, further guarantees the screening effect of grit.

Optionally, the baffle is rotatably connected with a plurality of rotating wheels used for pushing the conveyor belt to be sunken in the direction far away from the screening net drum, and the rotating wheels are uniformly distributed along the length direction of the conveyor belt.

Through adopting above-mentioned technical scheme, the center undercut of conveyer belt in the wheel can be rotated, and then the messenger falls into the centre that the grit on the conveyer belt concentrated the conveyer belt, can further reduce the possibility that the grit falls down from the conveyer belt both sides, further guarantees the screening effect of grit.

Optionally, two it is connected with a plurality of slope rollers to rotate between the baffle, the length direction evenly distributed of slope roller along the conveyer belt, the slope roller is located the upper band face of conveyer belt and takes between the face down, the upper band face of slope roller and conveyer belt is contradicted, the one end that the slope roller is close to the conveyer belt center is to the direction slope of keeping away from the screen cloth section of thick bamboo.

Through adopting above-mentioned technical scheme, the slope roller can support the conveyer belt, and then guarantees the stability of conveyer belt upper band face both sides, reduces the conveyer belt upper band face and takes place the possibility of slope, further reduces the grit and directly falls into the possibility in the collecting box from the conveyer belt, guarantees the screening effect of conveyer belt.

Optionally, a plurality of cams are rotatably connected between the two baffles, the cams are positioned between the upper belt surface and the lower belt surface of the conveyor belt, and the cams are abutted against the lower belt surface of the conveyor belt.

Through adopting above-mentioned technical scheme, the cam can be patted the lower band face of conveying belt, and then can shake the lower band face of conveying belt to the grit that makes the screening can fall into the collecting box, and then makes things convenient for the grit to collect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the spiral conveyor and the conveyor belt, the conveyor belt can convey sand falling from the screening net drum to the spiral conveyor, so that the screening net drum is convenient to further screen, the screening effect can be improved, and the screening operation is more convenient;

2. through the arrangement of the screening holes, the rotating rod, the turning plate and the cam, the rotating rod drives the turning plate to rotate, so that the turning sand is screened from the screening holes, and meanwhile, the cam can conveniently shake the sand into the collecting box, so that the screening effect is further ensured;

3. through the setting of runner and oblique roller, can reduce the direct possibility that falls into the collecting box of the both sides of following the conveyer belt of grit, and then guarantee the screening quality of grit.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the packing auger shown in the embodiment of the present application.

Description of reference numerals: 1. a base; 11. a collection box; 12. a rotating plate; 13. a support table; 14. a power motor; 141. a belt pulley; 142. a power belt; 15. a material guide plate; 16. a material receiving plate; 17. a cylinder; 18. a support plate; 19. a transfer motor; 2. screening the net drum; 21. an inlet; 22. an outlet; 23. a power tank; 24. a through hole; 3. a screw conveyor; 31. a delivery conduit; 32. a packing auger; 33. a screw motor; 34. a communicating pipe; 35. a discharge pipe; 4. a conveyor belt; 41. a screening well; 5. a baffle plate; 51. a tilt roller; 6. rotating the rod; 61. turning the plate; 62. a first spool; 7. a rotating wheel; 8. a cam; 9. a drive motor; 91. a rotating shaft; 92. a second spool; 93. and a connecting belt.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses circulation screening type shaftless drum sieve. Referring to fig. 1, the circulating screening type shaftless drum screen comprises a base 1 which is in the shape of a cuboid plate, wherein two sides of the upper surface of the cuboid, which are close to a short edge, are respectively and fixedly connected with rotating plates 12, and a screening net drum 2 is rotatably connected between the two rotating plates 12. The screen cylinder 2 is cylindrical, both ends of the screen cylinder 2 are open, and both ends of the screen cylinder 2 are respectively called as an inlet 21 and an outlet 22. A plurality of through holes 24 are arranged on the screening net cylinder 2, and the through holes 24 penetrate through the side wall of the screening net cylinder 2. In the screening process, the worker sends the initial sand into the screening net barrel 2 from the inlet 21 through equipment such as a forklift, and meanwhile, the screening net barrel 2 rotates to turn over the sand, so that the screened fine sand falls into the screening net barrel 2, the larger sand is discharged from the outlet 22, and the screening function is realized.

Referring to fig. 1, the upper surfaces of the two rotating plates 12 are both provided with arc-shaped grooves, and the height of the rotating plate 12 near the outlet 22 is less than that of the rotating plate 12 near the inlet 21. Annular support grooves are formed in two sides of the screening net barrel 2 and are coaxial with the screening net barrel 2, the screening net barrel 2 is rotatably connected in the arc-shaped groove, and the rotating plate 12 is rotatably connected in the annular support grooves. The rotating plate 12 can support the screening net cylinder 2, and can ensure the stability of the rotation of the screening net cylinder 2.

Referring to fig. 1, a support table 13 is fixedly connected to a base 1, a power motor 14 is fixedly connected to the support table 13, and a belt pulley 141 is coaxially and fixedly connected to an output shaft of the power motor 14. An annular power groove 23 is coaxially arranged at one end of the screening net cylinder 2 close to the outlet 22, and a power belt 142 is wound between the power groove 23 and the belt pulley 141. In the working process, the power motor 14 is started to drive the belt pulley 141 to rotate, and then the power belt 142 drives the screening net drum 2 to rotate, so that the sand is turned over.

Referring to fig. 1, a material guiding plate 15 is fixedly connected between the two rotating plates 12, the material guiding plate 15 extends along a length direction of a connecting line between the two rotating plates 12, the material guiding plate 15 is inclined along a width direction of the material guiding plate 15, and the material guiding plate 15 extends in a direction away from the screen cylinder 2. The sand after the screening falls into the stock guide 15, then the sand slides along the incline direction of the stock guide 15, finally falls into the fixed position and is conveniently collected.

Referring to fig. 1, a receiving plate 16 is slidably connected to the rotating plate 12 adjacent to the outlet 22, and the receiving plate 16 can receive sand remaining after screening and then move the sand to a waste sand collecting position, thereby facilitating uniform collecting treatment.

Referring to fig. 1, a sliding groove is horizontally formed in one side of the rotating plate 12, which is far away from the screening net drum 2, and the sliding groove is parallel to the upper surface of the base 1. The material receiving plate 16 is fixedly connected with a sliding block at one end close to the transverse groove, and the sliding block is connected in the sliding groove in a sliding mode. Meanwhile, the rotating plate 12 is fixedly connected with an air cylinder 17 parallel to the sliding groove, and a piston rod of the air cylinder 17 is fixedly connected with the side wall of the rotating plate 12. The piston rod of the cylinder 17 contracts to pull the rotating plate 12 to slide towards the direction far away from the screening net drum 2, so that the remaining sand after screening can directly fall down, and the next operation is convenient to perform.

Referring to fig. 1, a through opening is formed at one side of the two rotating plates 12, and the through opening penetrates through the rotating plates 12. Meanwhile, the base 1 is rotatably connected with a conveyor belt 4 positioned below the material guide plate 15, two ends of the conveyor belt 4 respectively extend out of two through openings, one end of the conveyor belt 4, which is close to the outlet 22, is positioned right below the outlet 22, and the conveyor belt 4 can rotate towards the direction close to the inlet 21. After the piston rod of the cylinder 17 has been retracted, sand falls from the outlet 22 onto the conveyor belt 4, thereby facilitating the transport of the conveyor belt 4.

Referring to fig. 1, two support frames parallel to the rotating plates 12 are fixedly connected to the base 1, and the support frames are located on one side of the two rotating plates 12, which are away from each other. The support frame comprises two support plates 18 which are parallel to each other, and the support plates 18 are vertically and fixedly connected with the upper surface of the base 1. Conveyer belt 4's transfer roller rotates to be connected between two backup pads 18, and rotatory hole has all been seted up to one side that two backup pads 18 are close to each other, and the axis of rotation of conveyer belt 4's transfer roller rotates to be connected in rotatory downthehole. Meanwhile, the outer side wall of one of the supporting plates 18 is fixedly connected with a transmission motor 19, and the output shaft of the transmission motor 19 is coaxially and fixedly connected with the rotating shaft of the transmission roller. In the working process, the transmission motor 19 drives the rotating roller to rotate, and then drives the transmission belt 4 to rotate, so that the sand is transported.

Referring to fig. 1, two baffles 5 are fixedly connected between the two rotating plates 12, and the two baffles 5 are respectively located at two sides of the long side of the conveyor belt 4. Baffle 5 sets up along the length direction of conveyer belt 4, and the height on baffle 5 top is greater than the height of the upper band face of conveyer belt 4, and the height of the bottom of baffle 5 is less than the height of the lower band face of conveyer belt 4 simultaneously. The length of baffle 5 equals the distance between the 12 only rotating plates that link, and baffle 5 can shelter from the both sides of conveyer belt 4, and then can reduce the possibility that the grit that falls into on conveyer belt 4 drops from the both sides of conveyer belt 4, and then guarantees the cleanliness factor of conveyer belt 4 below.

Referring to fig. 1, the conveyor belt 4 is provided with a plurality of screening holes 41, and the shape and size of the screening holes 41 are completely the same as those of the through holes 24. Meanwhile, the base 1 is connected with a collecting box 11 in a sliding mode, the upper surface of the collecting box 11 is opened, and the collecting box 11 is located right below the conveyor belt 4. In the process of conveying the sand by rotating the conveyor belt 4, the sand can be filtered again from the screening holes 41, so that the sand meeting the conditions falls into the collecting box 11 again through the screening holes 41, the sand is screened again, the screening effect of the sand can be guaranteed, and resources are saved.

Referring to fig. 1 and 2, three beams are fixedly connected between the two baffles 5, and the beams are perpendicular to the baffles 5. The crossbeams are uniformly distributed along the length direction of the baffle 5, one side of each crossbeam, which is close to the conveyor belt 4, is rotatably connected with a rotating wheel 7, the axis of each rotating wheel 7 is parallel to the crossbeam, and the connecting line of each rotating wheel 7 is positioned right above the conveyor belt 4. The rotating wheel 7 is abutted against the upper surface of the conveyor belt 4, and the rotating wheel 7 pushes the center of the upper surface of the conveyor belt 4 to be recessed toward the direction close to the collection box 11.

Referring to fig. 1 and 2, during the rotation of the conveyor belt 4, the rotating wheel 7 rotates along with the rotation of the conveyor belt 4, so that the friction between the conveyor belt 4 and the rotating wheel 7 can be reduced, and the abrasion of the conveyor belt 4 can be reduced. Meanwhile, the upper belt surface of the conveyor belt 4 is concave, so that sand falling onto the conveyor belt 4 can be gathered towards the center of the conveyor belt 4, the possibility that the sand directly falls into the collecting box 11 from the upper belt surface of the conveyor belt 4 in the rotating process of the conveyor belt 4 can be further reduced, and the screening quality of the sand is further ensured.

Referring to fig. 1, a rotating rod 6 is rotatably connected between two baffle plates 5, and the rotating rod 6 is positioned between two adjacent cross beams. The rotating rod 6 is fixedly connected with a plurality of turning plates 61, the turning plates 61 are positioned at the center of the rotating rod 6, and the turning plates 61 are uniformly distributed along the circumferential direction of the rotating rod 6. The turning plate 61 can be contradicted with the upper belt surface of the conveyor belt 4, the conveyor belt 4 drives the sand to move, the rotating rod 6 rotates to drive the turning plate 61 to rotate, the sand on the conveyor belt 4 can be further turned, the possibility that the screening holes 41 are blocked is reduced, the sand is conveniently screened through the screening holes 41, and the screening effect of the conveyor belt 4 on the sand can be guaranteed.

Referring to fig. 1, a plurality of inclined rollers 51 are rotatably connected between the two baffle plates 5, and the inclined rollers 51 are uniformly distributed along the length direction of the conveyor belt 4. The inclined roller 51 is positioned between the upper belt surface and the lower belt surface of the conveyor belt 4, and one end of the inclined roller 51 near the center of the two baffle plates 5 is inclined in a direction away from the collecting box 11. The inclined roller 51 is inclined at the same angle as the upper surface of the conveyor belt 4, and the inclined roller 51 abuts against the upper surface of the conveyor belt 4. The conveyer belt 4 rotates the in-process, can drive oblique roller 51 and rotate to can reduce the wearing and tearing of conveyer belt 4, oblique roller 51 can support the upper band face of conveyer belt 4 simultaneously, and then can reduce the conveyer belt 4 upper band face both sides and take place the possibility of slope, thereby can further reduce the possibility that the grit falls into collection box 11 from the both sides of conveyer belt 4 upper surface, thereby guarantee the screening effect of conveyer belt 4.

Referring to fig. 1, the rotation hole has been seted up to one side that two baffles 5 are just right, rotates the hole and runs through baffle 5, and dwang 6 rotates to be connected in rotating the hole, and the one end of dwang 6 extends and rotates the hole. The rotating rod 6 on the same side of the baffle 5 is coaxially and fixedly connected with the first spool 62, and a connecting belt 93 is wound between all the first spools 62. The connecting belt 93 can drive all the first spools 62 to rotate, so that all the rotating rods 6 can be driven to rotate simultaneously.

Referring to fig. 1 and 2, a plurality of round holes located between the upper belt surface and the lower belt surface of the conveyor belt 4 are formed between the two baffles 5, and the round holes are uniformly distributed along the length direction of the conveyor belt 4. The round hole is rotatably connected with a rotating shaft 91, the rotating shaft 91 is fixedly connected with a cam 8 positioned between the upper belt surface and the lower belt surface of the conveyor belt 4, and the cam 8 is abutted against the lower belt surface of the conveyor belt 4. The in-process that conveyer belt 4 transported and screened the grit, rotation axis 91 rotates and drives cam 8 simultaneously and rotates, and cam 8 can shake the lower band face of conveyer belt 4 to can make the last grit vibrations that fall into the lower band face of conveyer belt 4, and then fall into collection box 11, guarantee the collection effect of grit.

Referring to fig. 1, a side wall of the baffle 5 is penetrated through a side of the rotating shaft 91 close to the first spool 62, and a second spool 92 is coaxially and fixedly connected to the rotating shaft 91, and the connecting belt 93 bypasses all the first spools 62 and bypasses all the second spools 92. The outer side wall of one of the baffles 5 is fixedly connected with a driving motor 9, and a piston rod of the driving motor 9 is coaxially and fixedly connected with one of the rotating shafts 91. In the rotation process of the conveyor belt 4, the driving motor 9 is simultaneously started to drive the rotation shaft 91 to rotate, the rotation shaft 91 drives the second spool 92 to further drive all the first spools 62 and all the second spools 92 to rotate through the connecting belt 93, and therefore all the rotation shafts 91 and the rotation rods 6 are rotated.

Referring to fig. 1, two vertical rods parallel to each other are fixedly connected to one end of the base 1 near the inlet 21, and the vertical rods are located on two sides of the conveyor belt 4. Fixedly connected with screw conveyer 3 between two montants, screw conveyer 3's bottom intercommunication conveyer belt 4, bolt conveyer's top intercommunication screening net section of thick bamboo 2. The conveyer belt 4 rotates the in-process, and the conveyer belt 4 is carried the grit to screw conveyer 3 in, and then sends the grit into screening net section of thick bamboo 2 once more through screw conveyer 3 and screens once more to can make screening net section of thick bamboo 2 further screen the grit, can improve the screening effect, and the screening operation is more convenient.

Referring to fig. 2, the screw conveyor 3 includes a cylindrical conveying pipe 31 and a packing auger 32 rotatably connected to the inside of the conveying pipe 31. The vertical rod is fixedly connected with the conveying pipeline 31, the bottom surface of the conveying pipeline 31 is fixedly connected with the spiral motor 33, and the spiral motor 33 is coaxially and fixedly connected with the packing auger 32. In the working process, the screw motor 33 rotates to drive the packing auger 32 to rotate, and then sand is conveyed.

Referring to fig. 2, a communication pipe 34 is fixedly connected to a side wall of the conveying pipe 31, the communication pipe 34 is close to a bottom end of the conveying pipe 31, and the communication pipe 34 penetrates through the conveying pipe 31 and communicates therewith. One end of the communication pipe 34, which is far away from the delivery pipe, extends to the lower side of the conveyor belt 4, and the height of the communication pipe 34, which is near one end of the conveyor belt 4, is greater than that of the other end. After the conveyor belt 4 transports the sand to the upper side of the communication pipe 34, the sand falls into the communication pipe 34 and then enters the conveying pipeline 31 along the communication pipe 34.

Referring to fig. 2, an outlet pipe 35 is fixedly connected to the top end of the conveying pipe 31, the outlet pipe 35 penetrates through the conveying pipe 31 and is communicated with the conveying pipe, and one end of the outlet pipe 35, which is far away from the conveying pipe 31, extends into the inlet 21. Meanwhile, the height of the discharge pipe 35 close to one end of the screening net cylinder 2 is smaller than that of the other end. After the sand conveyed by the auger 32 is conveyed by the conveying pipeline 31, the sand is discharged from the discharge pipe 35 and enters the screening net drum 2, and then secondary screening is realized.

The implementation principle of the circulating screening type shaftless drum screen in the embodiment of the application is as follows: the user sends into the screening net section of thick bamboo 2 with grit from import 21, start motor power 14 simultaneously, motor power 14 drives screening net section of thick bamboo 2 and rotates, start motor conveyor 19 simultaneously, motor conveyor 19 drives conveyer belt 4 and rotates the grit and transport and filter, simultaneously motor drive 9 starts drive cam 8 and turns over board 61 and rotate, and then shake and turn over the grit on conveyer belt 4, start motor screw 33 simultaneously, motor screw 33 rotates and drives auger 32 and rotate, thereby send into the grit again and filter in the screening net section of thick bamboo 2, can improve the screening effect. After the screening is completed, the air cylinder 17 is actuated to push the receiving plate 16 to move to the position right below the outlet 22, so that the sand receiving plate moves to other positions, and then the user adds new sand into the screen cylinder 2 again for a new round of screening.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a circulating screening type shaftless drum sieve, includes base (1) and screening net section of thick bamboo (2), screening net section of thick bamboo (2) are connected its characterized in that with base (1) rotation: fixedly connected with screw conveyer (3) on base (1), the one end of screw conveyer (3) extends to in the screen cloth section of thick bamboo (2), it is connected with conveyer belt (4) to rotate on base (1), the one end of conveyer belt (4) is located the below that screw conveyer (3) one end was kept away from in screen cloth section of thick bamboo (2), the one end of screen cloth section of thick bamboo (2) is kept away from in the other end intercommunication screw conveyer (3) of conveyer belt (4).

2. The endless screening shaftless trommel as claimed in claim 1, wherein: the screening net barrel (2) is obliquely arranged, and the height of one end, close to the screw conveyor (3), of the screening net barrel (2) is larger than that of the other end of the screening net barrel.

3. The endless screening shaftless trommel as claimed in claim 1, wherein: the screening device is characterized in that the conveyor belt (4) is provided with a plurality of screening holes (41), and the base (1) is provided with a collecting box (11) which is positioned right below the conveyor belt (4).

4. The endless screening shaftless trommel as claimed in claim 1, wherein: fixedly connected with is located baffle (5) of conveyer belt (4) both sides on base (1), the height on baffle (5) top is greater than the height of conveyer belt (4), baffle (5) extend along the length direction of conveyer belt (4).

5. The endless screening shaftless trommel as claimed in claim 4, wherein: two it is connected with a plurality of dwang (6) to rotate between baffle (5), set firmly a plurality of turnover boards (61) that can contradict with conveyer belt (4) on dwang (6), the circumference evenly distributed of dwang (6) is followed to turnover board (61).

6. The endless screening shaftless trommel as claimed in claim 4, wherein: baffle (5) are gone up to rotate and are connected with a plurality of rotation wheels (7) that are used for promoting conveyer belt (4) to keeping away from that screening net section of thick bamboo (2) direction is sunken, rotate wheel (7) along the length direction evenly distributed of conveyer belt (4).

7. The endless screening shaftless trommel as claimed in claim 5, wherein: two it is connected with a plurality of oblique rollers (51) to rotate between baffle (5), the length direction evenly distributed of conveyer belt (4) is followed in oblique roller (51), oblique roller (51) are located between the upper band face of conveyer belt (4) and the lower band face, oblique roller (51) are contradicted with the upper band face of conveyer belt (4), oblique roller (51) are close to the one end at conveyer belt (4) center and incline to the direction of keeping away from a screening net section of thick bamboo (2).

8. The endless screening shaftless trommel as claimed in claim 4, wherein: two it is connected with a plurality of cams (8) to rotate between baffle (5), cam (8) are located the upper band face of conveyer belt (4) and take down between the face, cam (8) are contradicted with the lower face of taking of conveyer belt (4).