Scallion oil cake feeding device facilitating stripping

Abstract

The utility model discloses a scallion oil cake feeding device facilitating stripping. The scallion oil cake feeding device comprises a mounting rack, and a butt joint conveying belt, a conveying roller, a feeding conveying belt, a stripping conveying belt and a stripping assembly which are mounted on the mounting rack. The butt joint conveying belt, the conveying rollers and the feeding conveying belt are horizontally arranged in sequence, and the multiple sets of conveying rollers are evenly arranged. The stripping conveying belt is arranged above the butt joint conveying belt. In the stripping assembly, a mounting roller is located on the downstream portion of the butt joint conveying belt and is in butt joint with the stripping conveying belt, material guiding convex discs are evenly and fixedly connected to the periphery of the mounting roller, and a pressing roller is located over the mounting roller. A material cutting roller is further installed on the installation rack and located on the downstream of the stripping conveying belt, and a plurality of sets of cutter strips are evenly and fixedly connected to the material cutting roller. The utility model solves the problems that dough sheet leftover materials and dough cakes are difficult to effectively separate, and the baking quality is influenced by residual dough scraps and chopped green onions, ensures the product quality and the durability of equipment, and has remarkable practical value and popularization prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of scallion pancake production equipment, and specifically relates to a scallion pancake feeding device that is convenient for discharging materials. Background Art

[0002] Existing scallion pancake production equipment usually includes a die buckling device upstream and a baking device downstream. However, after the docking of these devices, there are some problems that need to be solved urgently. After the die buckling device presses the dough sheet into a round pancake, the scraps and the pancake still need further processing, and the current feeding device is not ideal in this process.

[0003] 1. It is difficult to effectively separate the scraps and the pancake: The existing feeding device lacks an efficient separation mechanism, resulting in difficulty in effectively separating the scraps of the dough sheet after die buckling and the pancake. Operators usually need to intervene manually to ensure that the pancake can smoothly enter the downstream baking device. This not only increases the labor cost but also reduces the production efficiency.

[0004] 2. Manual auxiliary operation: Due to the imperfect design of the equipment, operators must frequently intervene in the feeding and transmission processes. Such manual auxiliary operations are not only time-consuming and laborious but also easily lead to discontinuous production processes, increasing the uncertainty and complexity of production.

[0005] 3. Problems of residual dough crumbs and scallions: During the process of transporting the pancake to the baking device, residual dough crumbs and scallions often enter the baking device together. These scattered dough crumbs and scallions are easily burned at high temperatures, affecting the taste and quality of the baked scallion pancake. At the same time, the accumulation of these residues also increases the difficulty of equipment cleaning and maintenance, further affecting the production efficiency and product quality. Summary of the Utility Model

[0006] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a scallion pancake feeding device that is convenient for discharging materials, solve the problems that it is difficult to effectively separate the scraps of the cotton sheet and the pancake, and the residual dough crumbs and scallions affect the baking quality, ensure the quality of the product and the durability of the equipment, and have significant practical value and promotion prospects.

[0007] The technical solution adopted by the utility model to achieve the above purpose is: A scallion pancake feeding device that is convenient for discharging materials, including an installation frame, and a docking conveyor belt, a transmission roller, a feeding conveyor belt, a discharging conveyor belt, and a discharging component assembled on the installation frame. The docking conveyor belt, the transmission roller, and the feeding conveyor belt are arranged horizontally in sequence. The transmission roller includes multiple groups arranged evenly, and the discharging conveyor belt is arranged above the docking conveyor belt.

[0008] The blanking component includes an installation drum, a material guiding convex disc, and a pressure roller. The installation drum is arranged downstream of the docking conveyor belt and is docked with the blanking conveyor belt. The material guiding convex discs are uniformly fixed to the periphery of the installation drum, and the pressure roller is arranged directly above the installation drum.

[0009] A cutting roller is also assembled on the installation frame. The cutting roller is assembled downstream of the blanking conveyor belt, and multiple groups of knife bars are uniformly fixed to the cutting roller.

[0010] A discharge hopper and an arc-shaped groove are also fixed in the installation frame. The discharge hopper is arranged below the transmission roller, and the arc-shaped groove is arranged downstream of the blanking conveyor belt.

[0011] In some embodiments, to ensure the stability of the structure of the installation frame itself and ensure that all related components can be stably installed on the installation frame, the following technical solutions are provided.

[0012] The installation frame includes an installation bottom plate and installation side plates. The installation bottom plate is horizontally arranged. The installation side plates include two groups fixedly connected to the installation bottom plate in the vertical direction. The docking conveyor belt, the feeding conveyor belt, and the blanking conveyor belt are assembled between the two groups of installation side plates. The transmission roller, the pressure roller, the installation drum, and the cutting roller are all rotatably installed on the brackets of the two groups of installation side plates. The discharge hopper and the arc-shaped groove are both fixedly connected between the two groups of installation side plates. A discharge through hole and a discharge connecting pipe are provided on one group of installation side plates, and the discharge through hole and the discharge connecting pipe are respectively in communication with the discharge hopper and the arc-shaped groove.

[0013] In some embodiments, to ensure that the docking conveyor belt, the feeding conveyor belt, and the blanking conveyor belt can be stably installed in the installation frame and stably convey the scraps of the pancake and the dough sheet, the following technical solutions are provided.

[0014] The docking conveyor belt, the feeding conveyor belt, and the blanking conveyor belt all include driving rollers and transmission belts. The driving rollers include two groups arranged side by side. The transmission belt is wound around the periphery of the two groups of driving rollers and is in a taut state. The driving rollers are rotatably installed between the two installation side plates.

[0015] In some embodiments, since the docking conveyor belt transports the scraps of the dough sheet and the pancake, to prevent the flour crumbs and scallions from adhering to the outer transmission belt and being difficult to fall into the discharge hopper, the following technical solutions are provided.

[0016] Two cleaning rollers are rotatably installed on the two groups of installation side plates. Brush bars are uniformly fixed to the periphery of the cleaning rollers, and the brush bars are in contact with the transmission belt at the downstream of the docking conveyor belt.

[0017] In some of the implementations, in order to ensure that dough scraps can be stably transferred from the mounting roller to the stripping conveyor belt and to prevent dough scraps from leaking from the gap between the mounting roller and the stripping conveyor belt due to gravity, the following technical solution is provided.

[0018] A support roller is rotatably installed between the two groups of the installation side plates, and the support roller is arranged between the stripping conveyor belt and the installation roller.

[0019] In some of the implementations, in order to ensure that the dough scraps entering the arc groove can be stably discharged from the discharge pipe, the following technical solutions are provided.

[0020] A mounting shaft is rotatably mounted in the arc-shaped groove, a spiral conveying blade is fixedly connected to the mounting shaft, and the spiral conveying blade is kept in close contact with the inner wall of the arc-shaped groove.

[0021] Beneficial effects of the utility model:

[0022] 1. Efficient separation of scraps and dough cakes: The designed stripping component can efficiently separate the scraps of dough sheets from the dough cakes after buckling, avoiding the tedious process of manual assisted separation in traditional equipment, and greatly improving production efficiency.

[0023] 2. Reduce the residual dough and chopped green onion from entering the baking equipment: By setting up the transmission roller, cleaning roller and discharge hopper, the residual dough and chopped green onion on the transmission belt are effectively removed to prevent these residues from entering the baking equipment, thereby preventing the dough and chopped green onion from burning under high temperature, ensuring the taste and quality of the scallion pancake. At the same time, the frequency of equipment cleaning and maintenance is reduced, and the service life of the equipment is extended.

[0024] 3. Stable transmission to prevent leakage: The coordinated work between the support roller, the stripping conveyor belt and the mounting roller ensures that the dough scraps can be stably transferred to the stripping conveyor belt, avoiding the problem of leakage caused by gravity. In addition, the linkage between the cutting roller and the stripping conveyor belt ensures the cutting and transmission of the scraps, making the entire production process smoother and more efficient.

[0025] 4. The overall structure is stable and maintenance is convenient: The design of the mounting frame ensures the stability of each component in the mounting frame. The discharge port and discharge pipe on the mounting side panel, as well as the setting of the discharge hopper and arc groove, enable the dough scraps to be effectively collected and discharged, which is convenient for daily cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0028] Figure 3 Schematic diagram of the internal structure of the installation rack

[0029] Figure 4 Schematic diagram of the structure of the present utility model after removing the installation rack

[0030] Figure 5 For the said Figure 4 Schematic diagram of the structure from another perspective

[0031] Figure 6 Schematic diagram of the structure of the cutting roller

[0032] Figure 7 Schematic diagram of the structure of the cleaning roller

[0033] Figure 8 Schematic diagram of the structure of the matching combination of the installation drum and the material guiding convex disc

[0034] Figure 9 Schematic diagram of the structure of the matching combination of the installation shaft and the spiral conveying blade

[0035] In the figure: 1 installation rack, 11 discharge hopper, 12 arc groove, 13 installation bottom plate, 14 installation side plate, 15 discharge through port, 16 discharge connecting pipe, 161 support frame, 17 connecting cross plate, 18 baffle plate, 201 docking conveyor belt, 202 feeding conveyor belt, 203 blanking conveyor belt, 3 transmission roller, 41 installation drum, 42 material guiding convex disc, 43 pressure roller, 5 cutting roller, 51 knife bar, 6 cleaning roller, 61 brush bar, 7 support roller, 81 installation shaft, 82 spiral conveying blade, 91 noodle sheet scraps, 92 pancake. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] Please refer to Figure 1-9 , an onion pancake feeding device convenient for blanking, including an installation rack 1, and a docking conveyor belt 201, a transmission roller 3, a feeding conveyor belt 202, a blanking conveyor belt 203, and a blanking assembly assembled on the installation rack 1. The docking conveyor belt 201, the transmission roller 3, and the feeding conveyor belt 202 are arranged horizontally in sequence. The transmission roller 3 includes multiple groups arranged evenly, and the blanking conveyor belt 203 is arranged above the docking conveyor belt 201.

[0038] The blanking component includes an installation drum 41, a material guiding convex disk 42, and a pressure roller 43. The installation drum 41 is arranged downstream of the docking conveyor belt 201 and is docked with the blanking conveyor belt 203. The material guiding convex disk 42 is evenly fixed to the periphery of the installation drum 41, and the pressure roller 43 is arranged directly above the installation drum 41.

[0039] A cutting roller 5 is also assembled on the installation frame 1. The cutting roller 5 is assembled downstream of the blanking conveyor belt 203, and multiple groups of knife bars 51 are evenly fixed to the cutting roller 5.

[0040] A discharge hopper 11 and an arc-shaped groove 12 are also fixed in the installation frame 1. The discharge hopper 11 is arranged below the transmission roller 3, and the arc-shaped groove 12 is arranged downstream of the blanking conveyor belt 203.

[0041] The setting of the installation frame 1 can ensure the stable assembly and matching combination of the transmission roller 3, the blanking component, the cutting roller 5, and each conveyor belt on it, and ensure that the discharge hopper 11 and the arc-shaped groove 12 can be stably welded and installed on the installation frame 1.

[0042] The upstream end of the docking conveyor belt 201 and the downstream end of the feeding conveyor belt 202 are used to dock with the scallion pancake production line. Among them, the abutting conveyor belt is used to connect the buckling die equipment of the scallion pancake. The buckling die equipment evenly presses out circular pancakes 92 on the dough sheet and transports them to the docking conveyor belt 201. When transporting on the docking conveyor belt 201 and running in cooperation with the blanking component, the rotating installation drum 41 and the outer material guiding convex disk 42 can roll up the dough sheet scraps 91 at the corners of the periphery of the pancake 92, and turn upward with the installation drum 41 and transport them to the blanking conveyor belt 203. The rotating pressure roller 43 rotates in the opposite direction to the installation drum 41 and runs at the same linear speed. The pressure roller 43 cooperates with the material guiding convex disk 42 to stably transport the rolled-up dough sheet scraps 91 to the blanking conveyor belt 203. The blanking conveyor belt 203 transports the dough sheet scraps 91 into the arc-shaped groove 12. At the downstream of the blanking conveyor belt 203, it works in cooperation with the rotating cutting roller 5, and the knife bars 51 on it cut the dough sheet scraps 91 to ensure that the cut dough sheet scraps 91 can be stably conveyed outwards in the arc-shaped groove 12, realizing the reuse of the dough sheet scraps 91.

[0043] The pancake 92 from which the dough sheet scraps 91 at the periphery are removed sequentially passes through the transmission roller 3 and the feeding conveyor belt 202, and finally the feeding conveyor belt 202 transports the pancake 92 to the docked baking equipment for baking and processing of the pancake 92. When the pancake 92 is transported at the position of the transmission roller 3, since there are gaps between the transmission rollers 3, the dough scraps, scallions, etc. generated during the buckling die process can fall into the discharge hopper 11 below through the gaps and are discharged outwards by the discharge hopper 11 for recycling.

[0044] For the installation of the installation drum 41 and the material guiding convex disk 42, the material guiding convex disk 42 running directly below the installation drum 41 can fall at the position of the dough scrap 91. When the material guiding convex disk 42 running directly below can extrude the dough scrap 91, so that the dough scrap 91 adheres to the working surface of the material feeding convex disk, and then the rotating installation drum 41 and the material guiding convex disk 42 lift the dough disk scrap and turn it around the installation drum 41.

[0045] To ensure the stability of the self - mechanism of the installation frame 1 and ensure that all the components involved can be stably installed on the installation frame 1, the following technical solutions are provided.

[0046] The installation frame 1 includes an installation bottom plate 13 and installation side plates 14. The installation bottom plate 13 is horizontally arranged, and the installation side plates 14 include two groups fixedly connected to the installation bottom plate 13 in the vertical direction. The docking conveyor belt 201, the feeding conveyor belt 202, and the material discharging conveyor belt 203 are assembled between the two groups of installation side plates 14. The transmission roller 3, the pressing roller 43, the installation drum 41, and the cutting roller 5 are all rotatably installed on the brackets of the two groups of installation side plates 14. The discharge hopper 11 and the arc - shaped groove 12 are both fixedly connected between the two groups of installation side plates 14. A discharge through - hole 15 and a discharge connecting pipe 16 are provided on one group of installation side plates 14, and the discharge through - hole 15 and the discharge connecting pipe 16 are respectively in communication with the discharge hopper 11 and the arc - shaped groove 12.

[0047] The installation bottom plate 13 can ensure the stable installation of the feeding device provided in this application on the horizontal ground of the production workshop. A connecting cross - plate 17 is also fixedly connected between the two groups of installation side plates 14. The two sides of the feeding hopper are fixedly connected to the connecting cross - plate 17, and the connecting cross - plate 17 is arranged below the docking conveyor belt 201, the transmission roller 3, and the feeding conveyor belt 202.

[0048] The setting of the connecting cross - plate 17 and the installation side plates 14 can improve the overall mechanical strength of the installation frame 1, and then ensure that all components can be stably assembled between the two groups of installation side plates 14.

[0049] A baffle plate 18 is also fixedly connected between the two groups of installation side plates 14. The baffle plate 18 is butted against the two sides of the arc - shaped groove 12, which can prevent the dough scrap 91 input into the arc - shaped groove 12 from leaking out from the outside of the arc - shaped groove 12.

[0050] To ensure that the docking conveyor belt 201, the feeding conveyor belt 202, and the material discharging conveyor belt 203 can be stably installed in the installation frame 1 and stably convey the cake 92 and the dough scrap 91, the following technical solutions are provided.

[0051] The docking conveyor belt 201, the feeding conveyor belt 202, and the discharging conveyor belt 203 all include driving rollers and transmission belts. The driving rollers include two groups arranged side by side, and the transmission belt is wound around the periphery of the two groups of driving rollers and is in a taut state. The driving rollers are rotatably installed between two mounting side plates 14.

[0052] One of the groups of driving rollers is also power-connected to a motor, which drives the driving rollers to operate, and then drives the transmission belt to operate stably, so as to realize the stable transmission of the piece of scrap 91 or the noodle cake 92 on it.

[0053] For multiple groups of uniformly arranged transmission rollers 3, in order to ensure that each group of transmission rollers 3 operates synchronously and stably, sprockets can be assembled at the ends of the transmission rollers 3. The sprockets on two adjacent groups of transmission rollers 3 are linked through a chain, and one of the groups of transmission rollers 3 is connected to a motor, and the motor drives each group of transmission rollers 3 to operate synchronously, or directly realizes linkage with the driving rollers on the docking conveyor belt 201 or the feeding conveyor belt 202 through the combination of sprockets and chains, and the motor associated with the docking conveyor belt or the feeding conveyor belt 202 drives the transmission rollers 3 to operate.

[0054] Since during the process of the docking conveyor belt transporting the piece of scrap 91 and the noodle cake 92, in order to prevent the flour scraps and scallions from adhering to the outer transmission belt and being difficult to fall into the discharge hopper 11, the following technical solutions are provided.

[0055] Two cleaning rollers 6 are rotatably installed on the two mounting side plates 14. Brush strips 61 are uniformly fixed on the periphery of the cleaning rollers 6, and the brush strips 61 are kept in contact with the transmission belt at the downstream of the docking conveyor belt 201.

[0056] Reversing gears can be assembled on one of the cleaning rollers 6 and the driving rollers of the docking conveyor belt 201, and the two reversing gears are kept meshing. When the docking conveyor belt 201 is running, the cleaning rollers 6 can be driven to operate through the reversing gears, and then the brush strips 61 outside the cleaning rollers 6 clean the transmission belt, so as to sweep and collect the attached flour scraps and scallions into the discharge hopper 11.

[0057] In order to ensure that the piece of scrap 91 can be stably transported from the mounting roller 41 to the discharging conveyor belt 203 and prevent the piece of scrap 91 from leaking through the gap between the mounting roller 41 and the discharging conveyor belt 203 due to gravity, the following technical solutions are provided.

[0058] A support roller 7 is rotatably installed between the two mounting side plates 14, and the support roller 7 is arranged between the discharging conveyor belt 203 and the mounting roller 41.

[0059] One of the drive rollers of the installation drum 41 and the stripping conveyor belt 203 is equipped with a pulley, and the two pulleys are connected by a belt to achieve power connection. The installation drum 41 is driven by the stripping conveyor belt 203 to operate stably. The support roller 7 has no power input and stably supports the opposite side piece corner material 91 during the transmission process. At the axial center of the pressing roller 43 and the installation drum 41, two groups of reversing gears with different numbers of teeth and kept meshing are assembled to ensure that the pressing roller 43 and the installation drum 41 cooperate to ensure the stable transmission of the cotton piece corner material towards the stripping conveyor belt 203.

[0060] Two groups of reversing gears that keep meshing are assembled on one of the drive rollers of the cutting roller 5 and the stripping conveyor belt 203, ensuring that the cutting roller 5 rotates in the opposite direction to the drive roller, and then cutting the side piece corner material 91 transmitted to the downstream of the stripping conveyor belt 203.

[0061] In order to ensure that the side piece corner material 91 entering the arc-shaped groove 12 can be stably discharged from the discharge connecting pipe 16, the following technical solutions are provided.

[0062] An installation shaft 81 is rotatably installed in the arc-shaped groove 12, and a spiral conveyor blade 82 is fixedly connected to the installation shaft 81. The spiral conveyor blade 82 is kept in contact with the inner wall of the arc-shaped groove 12.

[0063] A support frame 161 is fixedly connected to the inner side of the discharge connecting pipe 16. The two ends of the installation shaft 81 are respectively rotatably installed in the installation side plate 14 and the support frame 161. Drive sprockets are fixedly connected to the ends of the installation shaft 81 and one of the drive rollers of the stripping conveyor belt 203. The two drive sprockets are linked by a chain, and the installation shaft 81 and the spiral conveyor blade 82 can be driven by the stripping conveyor belt 203 to operate stably. The rotating spiral conveyor blade 82 can stably output the side piece corner material 91 in the arc-shaped groove 12 from the discharge connecting pipe 16.

[0064] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0065] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A scallion pancake feeding device that is easy to remove, characterized in that: It comprises a mounting frame (1), and a docking conveyor belt (201), a transmission roller (3), a feeding conveyor belt (202), a stripping conveyor belt (203), and a stripping assembly mounted on the mounting frame (1), wherein the docking conveyor belt (201), the transmission roller (3), and the feeding conveyor belt (202) are arranged in a horizontal sequence, the transmission roller (3) comprises a plurality of groups arranged evenly, and the stripping conveyor belt (203) is arranged above the docking conveyor belt (201); The stripping assembly comprises a mounting roller (41), a material guide convex plate (42), and a pressure roller (43); the mounting roller (41) is arranged downstream of the docking conveyor belt (201) and docked with the stripping conveyor belt (203); the material guide convex plate (42) is evenly fixed to the periphery of the mounting roller (41); and the pressure roller (43) is arranged directly above the mounting roller (41); The mounting frame (1) is also equipped with a cutting roller (5), the cutting roller (5) being installed downstream of the stripping conveyor belt (203), and the cutting roller (5) is evenly fixed with a plurality of groups of blades (51); A discharge hopper (11) and an arc-shaped groove (12) are also fixed in the mounting frame (1); the discharge hopper (11) is arranged below the transmission roller (3), and the arc-shaped groove (12) is arranged downstream of the stripping conveyor belt (203).

2. A scallion pancake feeding device that is easy to remove according to claim 1, characterized in that: The mounting frame (1) comprises a mounting base plate (13) and a mounting side plate (14). The mounting base plate (13) is arranged horizontally. The mounting side plate (14) comprises two groups fixedly connected to the mounting base plate (13) in a vertical direction. The docking conveyor belt (201), the feeding conveyor belt (202) and the stripping conveyor belt (203) are mounted between the two groups of mounting side plates (14). The transmission roller (3), the pressure roller (43), the mounting roller (41) and the cutting roller (5) are all rotatably mounted on the brackets of the two groups of mounting side plates (14). The discharge hopper (11) and the arc groove (12) are all fixedly connected between the two groups of mounting side plates (14). One group of the mounting side plates (14) is provided with a discharge opening (15) and a discharge pipe (16). The discharge opening (15) and the discharge pipe (16) are respectively connected to the discharge hopper (11) and the arc groove (12).

3. A scallion pancake feeding device for easy removal according to claim 2, characterized in that: The docking conveyor belt (201), the feeding conveyor belt (202), and the stripping conveyor belt (203) all include drive rollers and transmission belts. The drive rollers include two groups arranged side by side. The transmission belts are wound around the outer peripheries of the two groups of drive rollers and are in a taut state. The drive rollers are rotatably mounted between two mounting side plates (14).

4. A scallion pancake feeding device for easy removal according to claim 3, characterized in that: Cleaning rollers (6) are rotatably mounted on the two groups of mounting side plates (14), brush strips (61) are evenly fixed to the periphery of the cleaning rollers (6), and the brush strips (61) are kept in contact with the transmission belt at the downstream of the docking conveyor belt (201).

5. The scallion pancake feeding device for easy removal according to claim 2, characterized in that: A support roller (7) is rotatably mounted between the two groups of mounting side plates (14), and the support roller (7) is arranged between the stripping conveyor belt (203) and the mounting roller (41).

6. The scallion pancake feeding device for easy removal according to claim 1, characterized in that: A mounting shaft (81) is rotatably mounted in the arc-shaped groove (12), a spiral conveying blade (82) is fixedly connected to the mounting shaft (81), and the spiral conveying blade (82) is kept in close contact with the inner wall of the arc-shaped groove (12).

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