Pulper for producing environment-friendly filter paper with high infiltration rate
By introducing a thrust sensor and an arc-shaped filter screen into the pulper, the problems of excessive shearing and clogging of long fiber raw materials in traditional pulpers have been solved, achieving an efficient and stable pulping and filtration process, and improving the quality and efficiency of filter paper production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI AMUSEN FILTER PAPER CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional pulpers are prone to fiber breakage due to excessive shearing of long fiber raw materials required for high-wetting filter paper. They lack a real-time monitoring mechanism and are difficult to dynamically adjust pulping parameters, resulting in poor pulp quality stability, easy clogging of filter components, low production efficiency, and unadjustable energy consumption, as well as the risk of pulp leakage.
The pulping monitoring component uses a thrust sensor to monitor the fiber status in real time and automatically adjusts the motor speed. Combined with an arc-shaped filter screen, it achieves integrated pulping and filtration. In the discharge stage, the particle size is precisely controlled by a rotating disc and a discharge disc to avoid clogging and fiber breakage.
It achieves precise fragmentation of long fiber raw materials, improves pulp fracturing rate and filter paper quality stability, reduces fiber breakage, improves production efficiency and energy utilization, and avoids pulp leakage and blockage.
Smart Images
Figure CN224243553U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of filter paper processing technology, and more specifically, to a pulper for the production of high-wetting-rate environmentally friendly filter paper. Background Technology
[0002] High-wetting-rate environmentally friendly filter paper is widely used in medical, food, and industrial filtration applications due to its high efficiency in liquid absorption and filtration. In its production process, the pulping stage is the core process of raw material pretreatment, which directly affects the dispersion of pulp fibers, the uniformity of pulping, and the wetting performance of subsequent paper.
[0003] Traditional pulpers mostly use a single stirring structure, which uses high-speed rotating blades to impact and crush the raw materials. However, for long-fiber raw materials (such as cotton pulp and special wood pulp) required for high-wetting filter paper, such equipment is prone to fiber breakage due to excessive shearing, which reduces the pulp flocculentization rate and thus affects the pore structure and liquid permeability of the filter paper. At the same time, the pulping process lacks a real-time monitoring mechanism, making it difficult to dynamically adjust the pulping parameters according to the characteristics of the raw materials, resulting in poor pulp quality stability.
[0004] The existing equipment's filter components are mostly fixed screens, which are prone to clogging due to fluctuations in pulp concentration. Furthermore, they cannot achieve simultaneous pulping and filtration, resulting in low production efficiency. The discharge stage usually uses gravity flow or simple screw conveyor, which lacks precise control over pulp particle size. This may cause insufficiently broken-up raw materials to enter subsequent processes, affecting the uniformity and strength of the finished filter paper.
[0005] Some traditional pulpers pose a risk of pulp leakage during operation, which not only pollutes the production environment but may also lead to waste of raw materials. At the same time, the power consumption of the equipment is constant during operation and cannot be dynamically adjusted according to the pulping load. When processing raw materials of different hardness, it is easy to encounter the phenomenon of "over-powered equipment for small loads", which increases production costs.
[0006] Therefore, a pulper for the production of high-wetting-rate environmentally friendly filter paper was developed. Utility Model Content
[0007] To overcome the above-mentioned defects, the embodiments of this disclosure provide a pulper for the production of high wettability environmentally friendly filter paper. This solves the problem that traditional pulpers in the prior art mostly adopt a single stirring structure, which uses high-speed rotating blades to impact and crush the raw materials. However, for long fiber raw materials (such as cotton pulp and special wood pulp) required for high wettability filter paper, such equipment is prone to fiber breakage due to excessive shearing, which reduces the pulp flocculentization rate and thus affects the pore structure and liquid permeability of the filter paper. At the same time, the pulping process lacks a real-time monitoring mechanism, making it difficult to dynamically adjust the pulping parameters according to the characteristics of the raw materials, resulting in poor pulp quality stability.
[0008] According to one aspect, at least one embodiment of this disclosure provides a pulper for the production of high-wetting-rate environmentally friendly filter paper, comprising:
[0009] A pulping tank, wherein a feed hood is provided at the upper end of the pulping tank;
[0010] A pulping monitoring component is disposed inside the pulping tank;
[0011] A drive discharge assembly is disposed on the lower end face of the pulping tank;
[0012] The pulping monitoring component includes a motor platform, which is located on the upper surface of the pulping tank. An output motor is mounted on the motor platform, and the output end of the output motor is inserted into the interior of the pulping tank. A pulping rod is located at the bottom of the output end of the output motor, and a pulping sleeve is located at the lower end of the pulping rod. Pulping blades are located on the side wall of the pulping sleeve. A monitoring ring is located at the top inner part of the pulping tank, and a thrust sensor is inserted into the side wall of the monitoring ring. A force-bearing sleeve is located at the detection end of the thrust sensor, and the force-bearing sleeve is located on the side wall of the pulping rod.
[0013] As a further technical solution, a filter screen is provided on the outer wall of the pulping sleeve, the filter screen is in contact with the inner wall of the pulping tank, and a feed inlet is provided between the feed hood and the pulping tank.
[0014] As a further technical solution, the drive discharge assembly includes a discharge port, which is located at the bottom of the pulping tank. A discharge hood is connected to the discharge port. A discharge motor is installed at the lower end of the pulping tank. The output end of the discharge motor is inserted into the discharge hood. A discharge plate is installed on the inner side wall of the discharge port. A discharge outlet is opened on the discharge plate. A through hole is provided on the discharge plate. The output end of the discharge motor is inserted into the through hole. A rotating disk is installed on the top of the discharge motor. A drop outlet is opened on the rotating disk. The drop outlet corresponds to the position of the discharge outlet.
[0015] As a further technical solution, a discharge pipe is provided at the lower end of the discharge hood, and a support frame is provided at the lower end of the pulping tank, with one end of the discharge pipe passing through the support frame.
[0016] As a further technical solution, a motor disc is provided at the lower end of the discharge motor, and the discharge motor is located at the center of the lower end face of the pulping tank.
[0017] As a further technical solution, the filter screen is located directly below the feed inlet, and the upper surface of the filter screen has an arc-shaped structure.
[0018] As a further technical solution, the number of thrust sensors is several, and the multiple thrust sensors are evenly distributed on the pulping sleeve.
[0019] As a further technical solution, both the discharge plate and the rotating plate are circular structures, and the structure of the discharge plate and the rotating plate are matched with that of the discharge port.
[0020] The beneficial effects of the embodiments disclosed herein are as follows:
[0021] 1. In this disclosure, the force sensor of the pulping monitoring component collects the force data of the pulping rod in real time. The system can accurately determine the pulping state of the raw material (such as the degree of fiber breakage and changes in pulp concentration) and automatically adjust the speed of the output motor. For example, when a hard pulp raw material is detected, causing a sudden increase in thrust, the system immediately reduces the speed to reduce excessive fiber shearing and avoid long fiber breakage; while when processing soft pulp, the speed is increased to enhance the pulping efficiency.
[0022] 2. In this disclosure, the arc-shaped filter screen plate on the outside of the pulping sleeve and the pulping blades form an integrated "pulverization-filtration" structure, which simultaneously completes the pulp screening during the pulping process, avoiding the clogging problem of traditional fixed screens. The discharge stage can accurately adjust the discharge particle size by controlling the misalignment of the rotating disc and the discharge disc. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0024] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0025] Figure 2 This is a cross-sectional view of the pulping tank disclosed herein;
[0026] Figure 3 This is a side view of the discharge disc of this disclosure;
[0027] Figure 4 This is a shaftside view of the thrust sensor disclosed herein;
[0028] In the diagram: 1. Pulping tank; 2. Feed hood; 3. Pulping monitoring component; 3-1. Motor platform; 3-2. Output motor; 3-3. Pulping rod; 3-4. Pulping sleeve; 3-5. Pulping blades; 3-6. Monitoring ring; 3-7. Thrust sensor; 3-8. Force sleeve; 3-9. Filter screen; 3-10. Feed inlet; 4. Drive discharge component; 4-1. Discharge port; 4-2. Discharge hood; 4-3. Discharge motor; 4-4. Discharge plate; 4-5. Discharge outlet; 4-6. Through hole; 4-7. Rotary disc; 4-8. Drop outlet; 4-9. Discharge pipe; 4-10. Support frame; 5. Motor disc. Detailed Implementation
[0029] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0030] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0031] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0032] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0034] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] like Figures 1-4 As shown, it illustrates a pulper for the production of high-wetting-rate environmentally friendly filter paper, comprising:
[0036] Pulping tank 1, with a feed hood 2 installed at the top of the pulping tank 1;
[0037] Pulping monitoring component 3 is installed inside pulping tank 1;
[0038] Drive the discharge assembly 4, which is located on the lower end face of the pulping tank 1;
[0039] The pulping monitoring component 3 includes a motor platform 3-1, which is located on the upper surface of the pulping tank 1. An output motor 3-2 is installed on the motor platform 3-1, and the output end of the output motor 3-2 is inserted into the interior of the pulping tank 1. A pulping rod 3-3 is installed at the bottom of the output end of the output motor 3-2. A pulping sleeve 3-4 is installed at the lower end of the pulping rod 3-3. Pulping blades 3-5 are installed on the side wall of the pulping sleeve 3-4. A monitoring ring 3-6 is installed at the top inside the pulping tank 1. A thrust sensor 3-7 is inserted into the side wall of the monitoring ring 3-6. A force-bearing sleeve 3-8 is installed at the detection end of the thrust sensor 3-7. The force-bearing sleeve 3-8 is located on the side wall of the pulping rod 3-3.
[0040] The drive discharge assembly 4 includes a discharge port 4-1, which is located at the bottom of the pulping tank 1. A discharge hood 4-2 is connected to the discharge port 4-1. A discharge motor 4-3 is installed at the lower end of the pulping tank 1. The output end of the discharge motor 4-3 is inserted into the discharge hood 4-2. A discharge plate 4-4 is installed on the inner side wall of the discharge port 4-1. A discharge port 4-5 is opened on the discharge plate 4-4. A through hole 4-6 is provided on the discharge plate 4-4. The output end of the discharge motor 4-3 is inserted into the through hole 4-6. A rotating disk 4-7 is installed on the top of the discharge motor 4-3. A drop outlet 4-8 is opened on the rotating disk 4-7. The drop outlet 4-8 corresponds to the position of the discharge port 4-5.
[0041] In some examples, the pulping tank 1 is placed stably in the selected location, ensuring it is level. This can be calibrated using a level. The placement of the pulping tank 1 should facilitate subsequent feeding and discharging operations as well as equipment maintenance. The feed hood 2 is installed on the upper end of the pulping tank 1, ensuring a tight connection between the feed hood 2 and the pulping tank 1. Bolts can be used for this connection, and a sealing gasket should be added at the connection point to prevent material leakage. The motor base 3-1 is then fixedly installed on the upper surface of the pulping tank 1, ensuring it is securely installed. Welding or high-strength bolts can be used for fixing. The output motor 3-2 is then installed on the motor base 3-1, following the motor's installation instructions. The installation accuracy of the motor is ensured. The power and control cables of the motor are connected, paying attention to the secureness and correctness of the wiring to prevent short circuits or open circuits. The output terminal of the output motor 3-2 is then inserted... Inside the pulping tank 1, and ensuring proper installation, install the pulping sleeve 3-4 at the lower end of the pulping rod 3-3. A threaded connection or other suitable fastening method can be used to ensure a secure connection between the pulping sleeve 3-4 and the pulping rod 3-3. Install pulping blades 3-5 on the side wall of the pulping sleeve 3-4. The installation angle and position of the pulping blades 3-5 should meet design requirements to ensure good pulping effect. Generally, the accuracy of blade installation can be ensured through measurement and marking. Install the monitoring ring 3-6 at the inner top of the pulping tank 1. The connection between the monitoring ring 3-6 and the pulping tank 1 can be achieved by welding or bolting. Insert a thrust sensor 3-7 into the side wall of the monitoring ring 3-6. Install a force-bearing sleeve 3-8 at the detection end of the thrust sensor 3-7, ensuring that the force-bearing sleeve 3-8 is located at a suitable position on the side wall of the pulping rod 3-3 to accurately detect the force on the pulping rod 3-3 during operation.
[0042] A discharge port 4-1 is opened at the bottom of the pulping tank 1. A discharge hood 4-2 is connected to the discharge port 4-1. The connection can be made by welding or flange connection, ensuring a tight seal to prevent pulp leakage. The discharge motor 4-3 is installed at the lower end of the pulping tank 1, positioned at the center of the lower end face of the pulping tank 1. Ensure the motor is installed stably. Insert the output end of the discharge motor 4-3 into the discharge hood 4-2, ensuring it can be smoothly inserted into the through hole 4-6 on the discharge plate 4-4. Install a rotating disk 4-7, which is connected to the output end of the discharge motor 4-3 to ensure that the rotating disk 4-7 can rotate synchronously with the discharge motor 4-3. A drop-out port 4-8 is opened on the rotating disk 4-7, so that the drop-out port 4-8 corresponds to the discharge port 4-5 on the discharge disk 4-4 to ensure that the slurry can be discharged smoothly. Install a discharge pipe 4-9 at the lower end of the discharge hood 4-2. The installation of the discharge pipe 4-9 should ensure that it is unobstructed. It can be connected to the discharge hood 4-2 by welding or threaded connection.
[0043] like Figures 1-4As shown in the figure, this embodiment proposes that the outer wall of the pulping sleeve 3-4 is provided with a filter screen plate 3-9, the filter screen plate 3-9 is attached to the inner wall of the pulping tank 1, and the feed hood 2 is provided with a feed inlet 3-10 between the pulping tank 1 and the feed hood 2.
[0044] In some examples, a filter screen 3-9 is installed on the outer wall of the pulping sleeve 3-4, ensuring that the filter screen 3-9 fits snugly against the inner wall of the pulping tank 1. This can be achieved by setting grooves or hooks on the edge of the filter screen 3-9 to fix it to the inner wall of the pulping tank 1. The filter screen 3-9 is located directly below the feed inlet 3-10, and its upper surface has an arc-shaped structure. During installation, it is important to ensure that the arc-shaped surface is facing correctly to facilitate the filtration and guidance of materials.
[0045] For example, such as Figure 2 As shown, a discharge pipe 4-9 is provided at the lower end of the discharge hood 4-2, and a support frame 4-10 is provided at the lower end of the pulping tank 1. One end of the discharge pipe 4-9 passes through the support frame 4-10.
[0046] In some examples, a support frame 4-10 is installed on the lower end face of the pulping tank 1. The support frame 4-10 is used to support the pulping tank 1 and ensure the stability of the equipment. One end of the discharge pipe 4-9 passes through the support frame 4-10. A suitable gap should be reserved at the outlet position of the discharge pipe 4-9 to prevent the discharge pipe 4-9 from rubbing or colliding with the support frame 4-10 during the operation of the equipment.
[0047] For example, such as Figure 2 As shown, a motor disc 5 is provided at the lower end of the discharge motor 4-3. The discharge motor 4-3 is located at the center of the lower end face of the pulping tank 1. The filter screen 3-9 is located directly below the feed inlet 3-10. The upper end face of the filter screen 3-9 has an arc-shaped structure.
[0048] In some examples, a motor disc 5 is installed at the lower end of the discharge motor 4-3. The motor disc 5 can be connected to the discharge motor 4-3 by bolts, which serves to fix and support the motor.
[0049] For example, such as Figure 2 As shown, there are several thrust sensors 3-7, which are evenly distributed on the pulping sleeve 3-4. The discharge plate 4-4 and the rotating plate 4-7 are both circular structures, and the structures of the discharge plate 4-4 and the rotating plate 4-7 are matched with those of the discharge port 4-1.
[0050] In some examples, multiple thrust sensors 3-7 can simultaneously monitor the degree of deviation during the rotation of the pulping rod 3-3.
[0051] Multiple thrust sensors 3-7 are evenly distributed on the side wall of the monitoring ring 3-6. The force-bearing sleeve 3-8 at the detection end of the sensor contacts the side wall of the pulping rod 3-3, forming a ring-shaped stress sensing network. When the pulping rod 3-3 drives the pulping blade 3-5 to rotate, the reaction force of the pulp on the blade is transmitted to the force-bearing sleeve 3-8 through the pulping rod 3-3, causing the sensor to deform and output an electrical signal.
[0052] During use, open the feed inlet 3-10 between the feed hood 2 and the pulping tank 1 to prepare for the input of raw materials. Feed the raw materials used to produce high-wetting-rate environmentally friendly filter paper, such as waste paper and pulp boards, evenly into the pulping tank 1 through the feed hood 2. Turn on the output motor 3-2 on the motor platform 3-1. The output end of the output motor 3-2 drives the pulping rod 3-3 and the pulping sleeve 3-4 to rotate at high speed. The pulping blades 3-5 on the side wall of the pulping sleeve 3-4 stir and break down the raw materials, gradually decomposing them into fine fibers. The thrust sensor 3-7 on the monitoring ring 3-6 at the top of the pulping tank 1 monitors the force on the pulping rod 3-3 in real time. When the hardness or fiber characteristics of the raw materials change, the thrust on the pulping rod 3-3 will also change accordingly. If the thrust data exceeds the normal range, the control system will automatically adjust the speed of the output motor 3-2. For example, when the thrust is excessive... When the thrust is too high, the speed of the output motor 3-2 should be appropriately reduced to avoid motor overload and excessive fiber breakage. When the thrust is too low, the speed can be appropriately increased to enhance the pulping effect. The filter screen 3-9 on the outer wall of the pulping sleeve 3-4 plays a filtering role during the pulping process. It fits against the inner wall of the pulping tank 1 to prevent larger particles from passing through, allowing qualified pulp to enter the lower part of the pulping tank 1 through the filter screen 3-9. Since the filter screen 3-9 is located directly below the feed inlet 3-10 and has an arc-shaped upper surface, it is conducive to the uniform distribution and filtration of materials, reducing the possibility of clogging. Under the action of gravity, the pulp after pulping is discharged from the pulping tank 1 through the discharge port 4-1 on the discharge plate 4-4 and the drop port 4-8 on the rotating plate 4-7, through the discharge hood 4-2 and the discharge pipe 4-9. One end of the discharge pipe 4-9 passes through the support frame 4-10 to ensure the stability and safety of the discharge process.
[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A pulper for producing high-wetting-rate environmentally friendly filter paper, characterized in that, include: A pulping tank (1) is provided with a feed hood (2) at its upper end; Pulping monitoring component (3), wherein the pulping monitoring component (3) is disposed inside the pulping tank (1); Drive the discharge assembly (4), which is disposed on the lower end face of the pulping tank (1); The pulping monitoring component (3) includes a motor platform (3-1), which is located on the upper surface of the pulping tank (1). An output motor (3-2) is provided on the motor platform (3-1). The output end of the output motor (3-2) is inserted into the interior of the pulping tank (1). A pulping rod (3-3) is provided at the bottom of the output end of the output motor (3-2). A pulping sleeve (3-4) is provided at the lower end of the pulping rod (3-3). Pulping blades (3-5) are provided on the side wall of the pulping sleeve (3-4). A monitoring ring (3-6) is provided at the top inside the pulping tank (1). A thrust sensor (3-7) is inserted into the side wall of the monitoring ring (3-6). A force-bearing sleeve (3-8) is provided at the detection end of the thrust sensor (3-7). The force-bearing sleeve (3-8) is located on the side wall of the pulping rod (3-3).
2. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 1, characterized in that, The outer wall of the pulping sleeve (3-4) is provided with a filter screen plate (3-9), the filter screen plate (3-9) is in contact with the inner wall of the pulping tank (1), and a feed inlet (3-10) is provided between the feed hood (2) and the pulping tank (1).
3. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 1, characterized in that, The drive discharge assembly (4) includes a discharge port (4-1) located at the bottom inner side of the pulping tank (1). A discharge hood (4-2) is connected to the discharge port (4-1). A discharge motor (4-3) is installed at the lower end of the pulping tank (1). The output end of the discharge motor (4-3) is inserted into the discharge hood (4-2). A discharge plate (4-4) is installed on the inner side wall of the discharge port (4-1). The discharge plate (4-4) has a discharge port (4-5) and a through hole (4-6). The output end of the discharge motor (4-3) is inserted into the through hole (4-6). A rotating disk (4-7) is provided on the top of the discharge motor (4-3). A drop hole (4-8) is provided on the rotating disk (4-7). The drop hole (4-8) is positioned corresponding to the discharge port (4-5).
4. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 3, characterized in that, The lower end of the discharge hood (4-2) is provided with a discharge pipe (4-9), and the lower end face of the pulping bucket (1) is provided with a support frame (4-10). One end of the discharge pipe (4-9) passes through the support frame (4-10).
5. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 3, characterized in that, The lower end of the discharge motor (4-3) is provided with a motor disc (5), and the discharge motor (4-3) is located at the center of the lower end face of the pulping tank (1).
6. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 2, characterized in that, The filter screen (3-9) is located directly below the feed inlet (3-10), and the upper surface of the filter screen (3-9) has an arc-shaped structure.
7. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 1, characterized in that, The number of thrust sensors (3-7) is several, and the multiple thrust sensors (3-7) are evenly distributed on the pulp sleeve (3-4).
8. A pulper for producing high-wetting-rate environmentally friendly filter paper according to claim 3, characterized in that, Both the discharge plate (4-4) and the rotating plate (4-7) are circular structures, and the structures of the discharge plate (4-4) and the rotating plate (4-7) are matched with those of the discharge port (4-1).