CN113758188A

CN113758188A - Powder raw material drying apparatus based on biomass fuel production and use

Info

Publication number: CN113758188A
Application number: CN202110925994.8A
Authority: CN
Inventors: 周楠
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-12-07

Abstract

The invention discloses a powder raw material dryer used in biomass fuel production, which comprises a shell, an inner cylinder, a heating ring, an oil inlet and an oil outlet, wherein the inner cylinder is coaxially arranged in the shell, the heating ring fixedly arranged is arranged between the outer wall of the inner cylinder and the inner wall of the shell, a second supporting rod arranged on the bottom wall of the shell is arranged below a tray, a first electromagnet is arranged at the top end of the second supporting rod, and the first supporting rod and the second supporting rod are vertically and correspondingly distributed in an initial state. This powder raw materials drying apparatus based on biomass fuel production uses redesigns the inside stoving structure of pot-type drying apparatus, utilizes the operation of motor and the rotation of pivot, when rotating stirring dispersion stoving, makes bottom bearing structure can reciprocate by a wide margin under the influence effect that electromagnetism is repelled to increase stoving means and improve the stoving effect, can carry out high efficiency's screening to the metallic impurity who exists in the powder simultaneously.

Description

Powder raw material drying apparatus based on biomass fuel production and use

Technical Field

The invention relates to the technical field of biomass fuel production, in particular to a powder raw material dryer used in biomass fuel production.

Background

The biomass fuel widely applied in life at present stage is obtained by carrying out secondary processing on waste materials such as straw wood and the like, the shortage of current combustion type energy and material is relieved by producing and using the fuel, although the waste materials are secondarily utilized, the working quality of the process and equipment is still ensured in the processing process, in the prior art, the straw waste materials are firstly crushed, and then moisture in fibers of the straw waste materials is dried and then mixed with a bonding agent and shaped and cut, so the combustion performance of subsequent fuel is determined by the quality of the drying effect, but the existing similar dryer has the following problems in actual use:

although possess certain humidity, powdered raw materials quality is lighter itself, and if the drying efficiency is accelerated to conveyer belt's drying apparatus, can inevitablely lead to powdered raw materials to fly away from the conveyer belt, and current pot-type stoving structure, because stoving structural design is unreasonable, single stirring stoving effect is relatively poor, and the air current is dried and is very easily leaded to appearing explosion phenomenon again.

Disclosure of Invention

The invention aims to provide a powder raw material dryer used in biomass fuel production, which aims to solve the problems that although the powder raw material dryer has certain humidity, the powder raw material is light in weight, if a conveyor belt type dryer needs to accelerate the drying efficiency, the powder raw material inevitably flies off a conveyor belt, and the existing tank type drying structure is unreasonable in drying structure design, poor in single stirring and drying effect, and easy to explode due to airflow drying.

In order to achieve the purpose, the invention provides the following technical scheme: a powder raw material dryer based on biomass fuel production and use comprises a shell, an inner barrel, a heating ring, an oil inlet and an oil outlet, wherein the inner barrel is coaxially arranged inside the shell, the heating ring is fixedly arranged between the outer wall of the inner barrel and the inner wall of the shell, the oil inlet and the oil outlet are respectively arranged at the top end and the bottom end of the heating ring, heating pipes are arranged inside the heating ring, the top end and the bottom end of each heating pipe are respectively communicated with the oil inlet and the oil outlet, the heating pipes are spirally distributed on the periphery of the inner barrel, a rotating shaft which is vertically distributed is arranged on the central axis of the inner barrel and is rotatably arranged on the top wall and the bottom wall of the shell, a feed inlet and a discharge outlet which are communicated with the inner barrel are respectively arranged at the top end and the lateral side of the shell, and the top end of the rotating shaft is connected with an output shaft of a motor through two conical teeth which are mutually meshed, the motor is installed at the top end of the shell, the inner barrel is internally provided with trays which are horizontally distributed, the trays are vertically and slidably connected to the lower half section of the rotating shaft through a first spring, the cross section of the joint of the trays and the rotating shaft is of a square structure, the lower end face of each tray is provided with a first support rod which is vertically distributed, the bottom end of each first support rod is fixedly provided with a permanent magnet, a second support rod which is installed on the bottom wall of the shell is arranged below the trays, the top end of each second support rod is provided with a first electromagnet, and the first support rods and the second support rods are vertically and correspondingly distributed in an initial state.

Preferably, the lower terminal surface of tray is provided with the depression bar, and the top and the ring fixed connection of depression bar to the ring rotates and installs the lower terminal surface at the tray, and the perpendicular sliding connection of depression bar is at the roof of gas box, and the inside of gas box is provided with the valve plate that links to each other with the depression bar bottom.

Preferably, the gas box inner space below the valve plate is communicated with the bottom end of the connecting pipe, the top end of the connecting pipe penetrates through the outer shell and the inner cylinder side wall to be communicated with the gas pipe, the gas pipe is vertically and fixedly installed on the inner wall of the inner cylinder, the top end of the gas pipe penetrates through the top wall of the outer shell, the upper section and the lower section of the gas pipe are provided with one-way valves, the top end of the gas pipe is an air suction port, and the bottom end of the gas pipe is an air outlet.

Preferably, the heating pipe is internally provided with a blade plate, the blade plate is arranged at the top end of the vertical shaft at an equal angle, the vertical shaft is vertically and rotatably arranged inside the heating ring, and the lower half section of the vertical shaft is provided with a cam plate.

Preferably, the cam plate is horizontally distributed and is arranged in the inner cavity of the heating ring, the outer wall of the cam plate collides with the outer wall of the inner cylinder when the cam plate rotates, and the edge of the cam plate is made of smooth elastic material.

Preferably, the outer wall fixed mounting of pivot has the dispersion pole of horizontal distribution, and the outer end of dispersion pole passes through second spring and horizontal sliding connection of a horizontal section of thick bamboo to the base is installed to the outer end of a horizontal section of thick bamboo, and the second electro-magnet is installed to the outer end of base.

Preferably, two groups of contact elastic sheets are arranged inside the transverse cylinder, the two contact elastic sheets are respectively connected with the second electromagnet and the dispersion rod, and the contact elastic sheets on the dispersion rod are connected with the electrified slip ring arranged at the top end of the shell through a lead.

Preferably, the horizontal cylinder is identical with a chute arranged on the inner cylinder, a rubber sheet with edges attached to each other is arranged in the chute, a collecting box arranged on the inner cylinder is arranged on the outer side of the chute, and a switch door is arranged on the collecting box.

Compared with the prior art, the invention has the beneficial effects that: according to the powder raw material dryer based on biomass fuel production and use, the internal drying structure of the tank type dryer is redesigned, and the bottom bearing structure can move up and down greatly under the influence of electromagnetic repulsion while rotating, stirring, dispersing and drying is carried out by utilizing the operation of a motor and the rotation of a rotating shaft, so that the drying effect is improved by increasing the drying means, and meanwhile, the metal impurities in the powder can be screened quickly and efficiently;

1. the first electromagnet and the permanent magnet are structurally designed, so that when the electromagnet is electrified, homopolar repulsion between the electromagnet and the permanent magnet can be utilized, and when the rotating shaft drives the tray to rotate, the tray can be moved up and down intermittently and greatly along the distribution direction of the rotating shaft, so that oscillation force is generated, the powder raw material on the tray can be lifted upwards under the condition of no wind, the contact area between the powder raw material and hot air is increased, and the drying effect is improved;

furthermore, due to the structural design of the circular ring and the pressure rod, when the tray moves up and down, the pressure rod and the valve plate arranged at the bottom end of the pressure rod can be driven to move up and down synchronously, so that air in the air box below the valve plate can be compressed and discharged into the connecting pipe at a high speed, and enters the air pipe and is sprayed out from the bottom when the connecting pipe is conducted, so that materials cannot be accumulated at the edge, and the air pipe is used in a one-way structure, so that the phenomenon that powder blocks the pipeline due to air backflow can be effectively avoided;

2. the dispersion rod on the rotating shaft is used, so that the rotating shaft can further disperse the raised and moving powder raw materials in a rotating mode, the effect of improving the drying efficiency is achieved, and meanwhile, the sleeve at the end of the dispersion rod and the second electromagnet can be used for adsorbing metal impurities in the powder by utilizing the magnetism of the second electromagnet after the second electromagnet is electrified;

further, the scalable structure design of a horizontal section of thick bamboo and dispersion pole makes it when outside flexible slip, thereby make the contact shell fragment can break away from automatically and make the second electro-magnet lose magnetism, and then make enter into the second electro-magnet in collecting the box through the spout, can make the metal piece of collecting drop to collecting the box in unified collection through the mode that loses magnetism, and structural design is reasonable to use more convenient.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the lifting structure of the tray of the present invention;

FIG. 3 is a schematic cross-sectional view of the gas box of the present invention;

FIG. 4 is an enlarged cross-sectional view taken at A in FIG. 1 according to the present invention;

FIG. 5 is a schematic top view of a dispersion rod according to the present invention;

FIG. 6 is an enlarged cross-sectional view taken at B in FIG. 5 according to the present invention;

FIG. 7 is a side sectional view of the collecting box of the present invention.

In the figure: 1. a housing; 2. an inner barrel; 3. a heating ring; 4. an oil inlet; 5. an oil outlet; 6. heating a tube; 7. a rotating shaft; 8. conical teeth; 9. an electric motor; 10. a tray; 11. a first spring; 12. a first support bar; 13. a permanent magnet; 14. a second support bar; 15. a first electromagnet; 16. a pressure lever; 17. a circular ring; 18. a gas box; 19. a valve plate; 20. a connecting pipe; 21. an air tube; 22. a paddle board; 23. a vertical axis; 24. a cam plate; 25. a dispersion rod; 26. a second spring; 27. a transverse cylinder; 28. a base; 29. a second electromagnet; 30. a contact spring; 31. a chute; 32. a collection box; 33. a rubber sheet; 34. opening and closing the door; 35. and energizing a slip ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a powder raw material dryer based on biomass fuel production use comprises a shell 1, an inner cylinder 2, a heating ring 3, an oil inlet 4, an oil outlet 5, a heating pipe 6, a rotating shaft 7, a bevel gear 8, a motor 9, a tray 10, a first spring 11, a first supporting rod 12, a permanent magnet 13, a second supporting rod 14, a first electromagnet 15, a pressure rod 16, a circular ring 17, an air box 18, a valve plate 19, a connecting pipe 20, an air pipe 21, a paddle plate 22, a vertical shaft 23, a cam plate 24, a dispersion rod 25, a second spring 26, a transverse cylinder 27, a base 28, a second electromagnet 29, a contact elastic sheet 30, a sliding chute 31, a collecting box 32, a rubber sheet 33, a switch door 34 and an electrified sliding ring 35, wherein the inner cylinder 2 is coaxially arranged inside the shell 1, the heating ring 3 fixedly installed is arranged between the outer wall of the inner cylinder 2 and the inner wall of the shell 1, the top end and the bottom end of the heating ring 3 are respectively provided with the oil inlet 4 and the oil outlet 5, and the heating ring 3 is internally provided with a heating pipe 6, the top end and the bottom end of the heating pipe 6 are respectively communicated with an oil inlet 4 and an oil outlet 5, the heating pipe 6 is spirally distributed at the periphery of the inner cylinder 2, a rotating shaft 7 which is vertically distributed is arranged on the central axis of the inner cylinder 2, the rotating shaft 7 is rotatably arranged at the top wall and the bottom wall of the shell 1, the top end and the side edge of the shell 1 are respectively provided with a feed inlet and a discharge outlet which are communicated with the inner cylinder 2, the top end of the rotating shaft 7 is connected with an output shaft of a motor 9 through two mutually meshed conical teeth 8, the motor 9 is arranged at the top end of the shell 1, a tray 10 which is horizontally distributed is arranged inside the inner cylinder 2, the tray 10 is vertically and slidably connected at the lower half section of the rotating shaft 7 through a first spring 11, the section of the joint part of the two is of a square structure, and a first supporting rod 12 which is vertically distributed is arranged on the lower end surface of the tray 10, and the bottom end of the first supporting rod 12 is fixedly provided with a permanent magnet 13, a second supporting rod 14 arranged on the bottom wall of the shell 1 is arranged below the tray 10, the top end of the second supporting rod 14 is provided with a first electromagnet 15, and the first supporting rod 12 and the second supporting rod 14 are distributed up and down correspondingly in an initial state.

The lower end surface of the tray 10 is provided with a pressure lever 16, the top end of the pressure lever 16 is fixedly connected with a circular ring 17, the circular ring 17 is rotatably installed on the lower end surface of the tray 10, the pressure lever 16 is vertically and slidably connected with the top wall of an air box 18, a valve plate 19 connected with the bottom end of the pressure lever 16 is arranged inside the air box 18, the inner space of the air box 18 below the valve plate 19 is communicated with the bottom end of a connecting pipe 20, the top end of the connecting pipe 20 penetrates through the side walls of the outer shell 1 and the inner tube 2 and is communicated with an air pipe 21, the air pipe 21 is vertically and fixedly installed on the inner wall of the inner tube 2, the top end of the air pipe 21 penetrates through the top wall of the outer shell 1, the upper section and the lower section of the air pipe 21 are both provided with one-way valves, the top end of the air inlet is an air outlet, the up-down movement of the tray 10 can drive the valve plate 19 to synchronously move up-down in the air box 18 through the pressure lever 16, when the valve plate 19 moves down, the air in the air box 18 can be compressed and enter the air pipe 21 through the connecting pipe 20, so that the bottom end of the air pipe 21 can spray air flow and the material is not remained at the edge above the tray 10.

The blade plates 22 are arranged inside the heating pipe 6, and the blade plates 22 are arranged at the top end of the vertical shaft 23 at equal angles, and the vertical shaft 23 is vertically and rotatably installed inside the heating ring 3, and the lower half section of the vertical shaft 23 is installed with a cam plate 24, the cam plate 24 is horizontally distributed, and is arranged in the inner cavity of the heating ring 3, and the outer wall of the cam plate 24 collides with the outer wall of the inner cylinder 2 when the cam plate 24 rotates, and the edge of the cam plate 24 is made of a smooth elastic material, when the heating medium flows inside the heating tube 6, the flow forces will act directly on the blade plates 22, the vertical shaft 23 is driven by the paddle board 22 to rotate synchronously, the rotation of the vertical shaft 23 drives the cam board 24 to rotate in the inner cavity of the heating ring 3 synchronously, thereby strike vibrations operation to the outer wall of inner tube 2, can effectively avoid the powder raw materials to bond in the inner wall that stops in inner tube 2 in drying process.

The outer wall of the rotating shaft 7 is fixedly provided with horizontally distributed dispersion rods 25, the outer ends of the dispersion rods 25 are horizontally and slidably connected with a transverse cylinder 27 through a second spring 26, the outer end of the transverse cylinder 27 is provided with a base 28, the outer end of the base 28 is provided with a second electromagnet 29, two groups of contact spring pieces 30 are arranged inside the transverse cylinder 27, the two contact spring pieces 30 are respectively connected with the second electromagnet 29 and the dispersion rods 25, the contact spring pieces 30 on the dispersion rods 25 are connected with an electrified slip ring 35 arranged at the top end of the shell 1 through conducting wires, the transverse cylinder 27 is matched with a sliding groove 31 arranged on the inner cylinder 2, a rubber sheet 33 with the edge jointed with each other is arranged in the sliding groove 31, a collection box 32 arranged on the inner cylinder 2 is arranged outside the sliding groove 31, a switch door 34 is arranged on the collection box 32, metal scraps in the powder can synchronously contact with the second electromagnet 29, and under the initial state, in fig. 6, the two contact spring pieces 30 are in a mutually contacting state, and in the case that the electrical slip ring 35 and the internal wires of the rotating shaft 7 are communicated, the second electromagnet 29 is connected with an external power supply to maintain an electrical state, so as to perform an adsorption operation on the metal debris, as shown in fig. 7, when the base 28 and the transverse cylinder 27 rotate to the side of the sliding chute 31, the resilient force of the second spring 26 can make the base 28 and the second electromagnet 29 penetrate through the rubber sheet 33 to enter the inside of the collecting box 32, at this time, the two contact spring pieces 30 are separated from contact, the electromagnet loses magnetism, and the metal debris can fall into the collecting box 32, so as to complete the separation of the metal debris and the powder raw material.

The working principle is as follows: firstly, powder raw materials enter the inner part of the inner barrel 2 through a feed inlet at the top end of the shell 1, the materials finally fall to the upper end surface of the tray 10, other heat sources such as hot oil or hot air enter the heating pipe 6 through the oil inlet 4, the hot oil or hot air flows spirally in the heating pipe 6 and is discharged through the oil outlet 5, under the condition of not contacting with the materials, the internal environment of the shell 1 is heated, meanwhile, as shown in figure 4, when a heating medium flows in the heating pipe 6, the flowing acting force can directly act on the paddle boards 22, the paddle boards 22 drive the vertical shafts 23 to synchronously rotate, the rotation of the vertical shafts 23 can synchronously drive the cam boards 24 to rotate in the internal cavity of the heating ring 3, so that the knocking vibration operation is carried out on the outer wall of the inner barrel 2, the powder raw materials can be effectively prevented from being bonded and staying in the inner wall of the inner barrel 2 in the drying process, in the drying process, the motor 9 can be electrified to operate;

under the driving action of the two engaging bevel gears 8 in fig. 1, the rotating shaft 7 will be in a rotating state synchronously and drive the tray 10 at the bottom to be in a rotating state synchronously, as shown in fig. 2, when the tray 10 rotates, the first supporting rod 12 installed at the bottom thereof and the permanent magnet 13 at the bottom of the first supporting rod 12 will rotate synchronously, when the permanent magnet 13 rotates to a position right above the first electromagnet 15, the first electromagnet 15 with the same polarity as the permanent magnet 13 after being electrified will drive the first supporting rod 12 and the tray 10 to move upwards along the rotating shaft 7 through the permanent magnet 13, and after the permanent magnet 13 continues to rotate, the tray 10 will move downwards again after the repulsive force disappears, so the tray 10 will rotate synchronously in the rotating process of the rotating shaft 7 and be in a state of moving up and down greatly, so the material above the tray 10 will be in a vibrating state, the heat inside can be more fully contacted with the dispersed powder raw materials by matching with the rotating dispersion rod 25, so that the drying effect is improved;

as shown in fig. 1 and 3, the tray 10 moves up and down by driving the valve plate 19 to move up and down inside the air box 18 synchronously by the pressure rod 16, and when the valve plate 19 moves down, the air inside the air box 18 is compressed and enters the air pipe 21 through the connecting pipe 20, so that the bottom end of the air pipe 21 can spray air flow, and the material is not remained at the edge above the tray 10.

Meanwhile, when the powder raw material is lifted and the dispersion rod 25 is in a rotating state, metal debris in the powder can be synchronously contacted with the second electromagnet 29, in an initial state, the two contact elastic sheets 30 in fig. 6 are in a mutually contacted state, and under the condition that the electrified sliding ring 35 and the internal lead of the rotating shaft 7 are communicated, the second electromagnet 29 is connected with an external power supply and is kept in an electrified state, so that the metal debris is adsorbed, as shown in fig. 7, when the base 28 and the transverse cylinder 27 rotate to the side of the sliding groove 31, the resilience force of the second spring 26 can enable the base 28 and the second electromagnet 29 to penetrate through the rubber sheet 33 and enter the inside of the collection box 32, at the moment, the two contact elastic sheets 30 are separated from contact, the electromagnet loses magnetism, and the metal debris can fall into the collection box 32, so that the metal debris and the powder raw material are separated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a powder raw materials drying apparatus based on biomass fuel production uses, includes shell (1), inner tube (2), heating ring (3), oil inlet (4) and oil-out (5), its characterized in that: the inside coaxial line of shell (1) is provided with inner tube (2), and is provided with fixed mounting's heating ring (3) between the outer wall of inner tube (2) and the inner wall of shell (1), oil inlet (4) and oil-out (5) are installed respectively to the top and the bottom of heating ring (3), and the inside of heating ring (3) is provided with heating pipe (6), and the top and the bottom of heating pipe (6) are linked together with oil inlet (4) and oil-out (5) respectively, and heating pipe (6) are the periphery of heliciform distribution in inner tube (2), be provided with vertically distributed's pivot (7) on the axis of inner tube (2), and pivot (7) rotate and install roof and the diapire at shell (1) to the feed inlet and the discharge gate that are linked together with inner tube (2) are installed respectively to the top and the avris of shell (1), the top of pivot (7) is through the output shaft looks of two intermeshing awl tooth (8) and motor (9) Even, and motor (9) install the top in shell (1), the inside of inner tube (2) is provided with horizontal distribution's tray (10), and tray (10) are through the lower half section of first spring (11) perpendicular sliding connection in pivot (7) to both laminating department cross-sections are square structure, first bracing piece (12) of perpendicular distribution are installed to the lower terminal surface of tray (10), and the bottom fixed mounting of first bracing piece (12) has permanent magnet (13), the below of tray (10) is provided with second bracing piece (14) of installing on shell (1) diapire, and first electro-magnet (15) are installed on the top of second bracing piece (14), and correspond the distribution about initial condition first bracing piece (12) and second bracing piece (14).

2. The powder raw material dryer used based on biomass fuel production according to claim 1 is characterized in that: the lower terminal surface of tray (10) is provided with depression bar (16), and the top and ring (17) fixed connection of depression bar (16) to ring (17) rotate and install the lower terminal surface at tray (10), and perpendicular sliding connection in the roof of gas box (18) of depression bar (16), and the inside of gas box (18) is provided with valve plate (19) that link to each other with depression bar (16) bottom.

3. The powder raw material dryer used based on biomass fuel production according to claim 2 is characterized in that: the air box (18) inner space below the valve plate (19) is communicated with the bottom end of the connecting pipe (20), the top end of the connecting pipe (20) penetrates through the side walls of the outer barrel (1) and the inner barrel (2) and is communicated with the air pipe (21), the air pipe (21) is vertically and fixedly installed on the inner wall of the inner barrel (2) and the top end of the inner barrel penetrates through the top wall of the outer barrel (1), the upper section and the lower section of the air pipe (21) are provided with one-way valves, the top end of the air pipe is an air suction port, and the bottom end of the air pipe is an air outlet.

4. The powder raw material dryer used based on biomass fuel production according to claim 1 is characterized in that: the inside of heating pipe (6) is provided with paddle board (22), and the top at vertical axis (23) is installed to angle such as paddle board (22) to vertical axis (23) rotate perpendicularly and install the inside at heating ring (3), and cam plate (24) are installed to the lower half section of vertical axis (23).

5. The powder raw material dryer used based on biomass fuel production according to claim 4 is characterized in that: the cam plate (24) is horizontally distributed and is arranged in the inner cavity of the heating ring (3), the outer wall of the cam plate (24) collides with the outer wall of the inner cylinder (2) when the cam plate rotates, and the edge of the cam plate (24) is made of smooth elastic material.

6. The powder raw material dryer used based on biomass fuel production according to claim 1 is characterized in that: the outer wall fixed mounting of pivot (7) has horizontal distribution's dispersion pole (25), and the outer end of dispersion pole (25) passes through second spring (26) and horizontal section of thick bamboo (27) horizontal sliding connection to base (28) are installed to the outer end of horizontal section of thick bamboo (27), and second electro-magnet (29) are installed to the outer end of base (28).

7. The powder raw material dryer used based on biomass fuel production of claim 6 is characterized in that: two groups of contact elastic sheets (30) are arranged in the transverse cylinder (27), the two contact elastic sheets (30) are respectively connected with the second electromagnet (29) and the dispersion rod (25), and the contact elastic sheets (30) on the dispersion rod (25) are connected with an electrified slip ring (35) arranged at the top end of the shell (1) through a lead.

8. The powder raw material dryer used based on biomass fuel production of claim 6 is characterized in that: the horizontal cylinder (27) is matched with a chute (31) arranged on the inner cylinder (2), a rubber sheet (33) with the edge attached to the chute (31) is arranged in the chute (31), a collecting box (32) arranged on the inner cylinder (2) is arranged on the outer side of the chute (31), and a switch door (34) is arranged on the collecting box (32).