Medicine moistening device for processing traditional Chinese medicine decoction pieces

Abstract

The utility model discloses a medicine moistening device for traditional Chinese medicine decoction piece processing, and relates to the technical field of traditional Chinese medicine decoction piece processing, in particular to a supporting frame, a spraying liquid collecting box and two impurity collecting boxes, and an inner cavity of the supporting frame is sequentially provided with an upper conveying structure, a middle conveying structure and a lower conveying structure from top to bottom. Each of the upper conveying structure, the middle conveying structure and the lower conveying structure comprises a conveying mesh belt, a deslagging structure is arranged on the inner side of each conveying mesh belt, a spraying plate is arranged above the upper conveying structure, a liquid inlet pipe and a return pipe are fixed on one side of an inner cavity of the spraying plate, and a spraying liquid collecting box is arranged below the lower conveying structure. According to the medicine infiltrating device for traditional Chinese medicine decoction piece processing, through the arrangement of the upper conveying structure, the middle conveying structure and the lower conveying structure, continuous work can be achieved, the infiltrating efficiency of traditional Chinese medicinal materials is improved, the traditional Chinese medicinal materials can be infiltrated for multiple times, the infiltrating effect is guaranteed, and processing of the traditional Chinese medicine decoction pieces is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of Chinese medicine slice processing, in particular to a medicine lubricating device for Chinese medicine slice processing. Background Art

[0002] Chinese herbal medicine slices are Chinese herbal medicines that have been processed according to the theory of traditional Chinese medicine and the processing methods of traditional Chinese medicine, and can be directly used in clinical Chinese medicine. During the production and processing of Chinese herbal medicine slices, the medicinal materials need to be soaked to soften them so that they can be sliced.

[0003] In the prior art, some medicine lubricating devices for processing Chinese herbal medicine slices are disclosed, such as an infiltration device for processing Chinese herbal medicine slices disclosed in the authorized patent with application number CN202121884237.2, and a medicine lubricating device for processing Chinese herbal medicine slices disclosed in the authorized patent with application number CN202221937371.9; when the above scheme is in use, the Chinese medicinal materials to be infiltrated are placed in a placement box, and the medicine is lubricated by steam or spraying, but during the replacement process of the Chinese medicinal materials, it is necessary to first take out the infiltrated Chinese medicinal materials in the placement box, and then put in new Chinese medicinal materials, which results in low efficiency in replacing the Chinese medicinal materials and affects the working efficiency of the above scheme; and when the above scheme is in use, the residues or impurities adhered to the surface of the Chinese medicinal materials cannot be separated from the Chinese medicinal materials, and the residues or impurities will affect the contact between the Chinese medicinal materials and the infiltration liquid, thereby affecting the medicine lubricating effect; based on this, the present application proposes a medicine lubricating device for processing Chinese herbal medicine slices. Utility Model Content

[0004] The utility model provides a medicine moistening device for processing Chinese herbal medicine slices, which solves the problems in the above-mentioned background technology that the replacement efficiency of Chinese medicinal materials is low, affecting the efficiency of medicine moistening; and the residues or impurities adhered to the surface of the Chinese medicinal materials cannot be separated from the Chinese medicinal materials, affecting the effect of medicine moistening.

[0005] The utility model provides the following technical scheme: a medicine lubricating device for processing Chinese herbal medicine slices, comprising a supporting frame, a spray liquid collecting box and two impurity collecting boxes, the inner cavity of the supporting frame is provided with an upper conveying structure, a middle conveying structure and a lower conveying structure in sequence from top to bottom, and the upper conveying structure is connected to the lower conveying structure through a synchronous belt one transmission connection, the lower conveying structure is connected to the middle conveying structure through a synchronous belt two and a gear set, and the movement direction of the lower conveying structure is opposite to that of the middle conveying structure; the upper conveying structure, the middle conveying structure and the lower conveying structure all include a conveying mesh belt, baffles are provided on both sides of the top of the conveying mesh belt, a slag removal structure is provided on the inner side of the conveying mesh belt, a spray plate is provided above the upper conveying structure, a liquid inlet pipe and a reflux pipe are fixed on one side of the inner cavity of the spray plate, a spray liquid collecting box is provided below the lower conveying structure, the inner cavity of the spray liquid collecting box is connected to the reflux pipe through a reflux pump, impurity collection boxes are provided on both sides of the lower conveying structure, and a material receiving box is provided at one end of the lower conveying structure;

[0006] The slag removal structure includes a filter screen located on the inner side of the conveyor mesh belt, a water baffle, a fixed scraper in contact with the bottom of the conveyor mesh belt, and a movable scraper located on the inner side of the conveyor mesh belt. Water baffles are fixed at both ends of the filter screen. The movable scraper is connected to a water baffle through a hydraulic telescopic rod. The bottom of the movable scraper is in contact with the top of the filter screen, and the top of the movable scraper is in contact with the top of the inner side of the conveyor mesh belt.

[0007] Preferably, the spray plate is located directly above both the spray liquid collection box and the filter screen, and the spray plate is fixedly connected to the support frame.

[0008] Preferably, the upper conveying structure includes two upper rollers movably connected to the support frame, and the two upper rollers are connected through a conveyor mesh belt transmission; the middle conveying structure includes two middle rollers movably connected to the support frame, and the two middle rollers are connected through another conveyor mesh belt transmission; the lower conveying structure includes two lower rollers movably connected to the support frame, and the two lower rollers are connected through another conveyor mesh belt transmission.

[0009] Preferably, a groove is provided at one end of the water retaining plate away from the filter screen, and the upper roller, the middle roller or the lower roller is movably connected to the inner cavity of the groove.

[0010] Preferably, one end of the movable scraper is fixedly connected to a connecting rod, a water baffle is provided with a through groove adapted to the connecting rod, a hydraulic telescopic rod is fixed to the outer side of the water baffle, and the other end of the hydraulic telescopic rod is fixedly connected to the connecting rod.

[0011] Preferably, a guide plate is provided at one end of the lower conveying structure close to the material receiving box, the guide plate is inclined, the high end of the guide plate is fixedly connected to the support frame, and the bottom end of the guide plate is located above the material receiving box.

[0012] Preferably, guide plate 1 is fixed on both sides of the upper conveying structure, guide plate 2 is fixed on both sides of the middle conveying structure, and guide plate 3 is fixed on both sides of the lower conveying structure. The guide plate 1, the guide plate 2 and the guide plate 3 are all inclined. The filter screen contacts the high end of the guide plate 1, the high end of the guide plate 2 or the high end of the guide plate 3. The bottom ends of the guide plate 1, the guide plate 2 and the guide plate 3 are all located above the impurity collection box, and the fixed scraper is fixed to the guide plate 1, the guide plate 2 or the guide plate 3.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The medicine-wetting device for processing Chinese herbal medicine slices can realize continuous operation through the arrangement of the upper conveying structure, the middle conveying structure and the lower conveying structure, thereby improving the efficiency of the infiltration of Chinese herbal medicines. The Chinese herbal medicines can be infiltrated for multiple times to ensure the infiltration effect of the Chinese herbal medicines, thereby facilitating the processing of Chinese herbal medicine slices.

[0015] 2. The medicine-wetting device for processing Chinese herbal medicine slices is equipped with a conveying mesh belt, a slag removal structure and a reflux pump. During the use of the device, impurities such as medicine residues adhered to the surface of Chinese medicinal materials will be separated from the Chinese medicinal materials to ensure the infiltration effect of the Chinese medicinal materials. The generated waste liquid can be filtered and reused to reduce the loss of the spray liquid. It can also reduce the amount of effective ingredients of Chinese medicinal materials dissolved in the spray liquid, reduce the loss of effective ingredients of Chinese medicinal materials, and ensure the efficacy of Chinese medicinal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the structure of the utility model;

[0017] Figure 2 The utility model structure Figure 1 Back diagram;

[0018] Figure 3 The utility model structure Figure 1 Schematic cross-section;

[0019] Figure 4 This is a schematic diagram of the connection between the filter screen and the water retaining plate of the utility model structure;

[0020] Figure 5 The utility model structure Figure 3 Right view.

[0021] In the figure: 1. support frame; 2. upper roller; 3. middle roller; 4. lower roller; 5. baffle; 6. water baffle; 7. fixed scraper; 8. guide plate three; 9. impurity collection box; 10. filter screen; 11. guide plate two; 12. guide plate one; 13. hydraulic telescopic rod; 15. spray liquid collection box; 16. reflux pump; 17. material collection box; 18. spray plate; 19. guide plate; 20. conveyor belt; 21. rotating motor; 22. liquid inlet pipe; 23. reflux pipe; 24. synchronous belt one; 25. movable scraper. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a medicine-wetting device for processing Chinese herbal medicine slices, comprising a support frame 1, a spray liquid collection box 15 and two impurity collection boxes 9. The inner cavity of the support frame 1 is provided with an upper conveying structure, a middle conveying structure and a lower conveying structure from top to bottom, and the upper conveying structure is connected to the lower conveying structure through a synchronous belt 1 24, and the lower conveying structure is connected to the middle conveying structure through a synchronous belt 2 and a gear set, and the movement direction of the lower conveying structure is opposite to that of the middle conveying structure. Through the arrangement of the upper conveying structure, the middle conveying structure and the lower conveying structure, the upper conveying structure can convey the medicine that has been soaked once to the middle conveying structure, and the middle conveying structure drives the medicine to be soaked for the second time, and the medicine that has been soaked for the second time falls to the lower conveying structure under the action of gravity, and the lower conveying structure drives the medicine to be soaked for the third time, thereby realizing multiple soaking of Chinese herbal medicines.

[0024] A material receiving box 17 is provided at one end of the lower conveying structure, and a guide plate 19 is provided at one end of the lower conveying structure close to the material receiving box 17. The guide plate 19 is inclined, and the high end of the guide plate 19 is fixedly connected to the support frame 1, and the bottom end of the guide plate 19 is located above the material receiving box 17. Through the setting of the material receiving box 17, the material receiving box 17 can collect the repeatedly soaked Chinese medicinal materials, which is convenient for the unified processing of the Chinese medicinal materials.

[0025] The upper conveying structure includes two upper rollers 2 movably connected to the inner cavity of the support frame 1, and the two upper rollers 2 are connected by a conveying mesh belt 20; the middle conveying structure includes two middle rollers 3 movably connected to the inner cavity of the support frame 1, and the two middle rollers 3 are connected by another conveying mesh belt 20; the lower conveying structure includes two lower rollers 4 movably connected to the inner cavity of the support frame 1, and the two lower rollers 4 are connected by another conveying mesh belt 20, and an upper roller 2 and a lower roller 4 are connected by a synchronous belt 24, a round rod is movably connected to one side of the support frame 1, and a gear is fixedly connected to the other end of the round rod, and the other lower roller 4 is connected to the round rod by a synchronous belt 2, and the end of a middle roller 3 is fixedly connected to another gear, and the two gears are in a meshing state.

[0026] From the above description, it can be known that the rotation of the upper roller 2 can make the lower roller 4 rotate in the same direction, while the middle roller 3 rotates in the opposite direction to the lower roller 4 and the upper roller 2, so that the movement direction of the upper conveying structure is the same as the movement direction of the lower conveying structure, and the movement direction of the lower conveying structure is opposite to the movement direction of the middle conveying structure, which is convenient for the transfer of Chinese medicinal materials. In the process of transferring, the Chinese medicinal materials can be turned over, which is convenient for the device to infiltrate the Chinese medicinal materials.

[0027] A rotating motor 21 is fixedly connected to one side of the support frame 1, and the end of the output shaft of the rotating motor 21 is fixedly connected to the end of the upper roller 2 through a transmission. Through the setting of the rotating motor 21, the rotation of the rotating motor 21 can drive the upper roller 2 fixedly connected thereto to rotate, and the rotation of the upper roller 2 can realize the rotation of the conveyor mesh belt 20.

[0028] A spray plate 18 is provided above the upper conveying structure, and the spray plate 18 is fixedly connected to the support frame 1. A liquid inlet pipe 22 and a return pipe 23 are fixed on one side of the inner cavity of the spray plate 18. An electric ball valve is provided at one end of the liquid inlet pipe 22 and the return pipe 23. When the spray liquid enters the inner cavity of the spray plate 18 through the liquid inlet pipe 22, the spray liquid in the inner cavity of the spray plate 18 is sprayed onto the Chinese medicinal materials through the spray holes provided at the bottom of the inner cavity, thereby realizing spray infiltration of the Chinese medicinal materials. Moreover, the spray liquid can pass through the three-layer conveying mesh belt 20 in sequence under the action of gravity, and impurities such as drug residues adhered to the surface of the Chinese medicinal materials can be washed away by the spray liquid, thereby preventing the impurities such as drug residues from affecting the infiltration of the Chinese medicinal materials.

[0029] A spray liquid collection box 15 is provided below the lower conveying structure, and a spray plate 18 is located above the spray liquid collection box 15. Excess spray liquid sprayed by the spray plate 18 can be collected by the spray liquid collection box 15. A reflux pump 16 is fixedly connected to one end of the spray liquid collection box 15. The liquid inlet end of the reflux pump 16 extends to the bottom end of the inner cavity of the spray liquid collection box 15 through a pipeline, and the liquid outlet end of the reflux pump 16 is fixedly connected to the reflux pipe 23. Through the provision of the reflux pump 16, the spray liquid in the spray liquid collection box 15 can be pumped into the inner cavity of the spray plate 18 by the reflux pump 16, so as to realize the recycling of the spray liquid.

[0030] Baffles 5 are provided on both sides of the top of the conveyor mesh belt 20. The baffles 5 and the conveyor mesh belt 20 are in a state of active connection. The baffles 5 are fixedly connected to the support frame 1. Through the setting of the baffles 5, the baffles 5 can intercept the Chinese medicinal materials to prevent them from overflowing during the spraying process.

[0031] The inner side of the conveyor mesh belt 20 is provided with a slag removal structure, which includes a filter screen 10 located inside the conveyor mesh belt 20, a water baffle 6, a fixed scraper 7 in contact with the bottom of the conveyor mesh belt 20, and a movable scraper 25 located inside the conveyor mesh belt 20. The two ends of the filter screen 10 are fixed with water baffles 6, and the end of the water baffle 6 away from the filter screen 10 is provided with a groove, and the upper roller 2, the middle roller 3 or the lower roller 4 is movably connected with the inner cavity of the groove. Through the setting of the filter screen 10, the filter screen 10 can filter the spray liquid separated from the Chinese medicinal materials to prevent impurities from affecting other Chinese medicinal materials. Through the setting of the water baffle 6, the water baffle 6 can support and shield the conveyor mesh belt 20, which is convenient for the conveyor mesh belt 20 to transport Chinese medicinal materials, and can prevent the spray liquid and impurities from dripping on the outside of the filter screen 10.

[0032] One end of the movable scraper 25 is fixedly connected with a connecting rod, a water baffle 6 is provided with a through groove adapted to the connecting rod, a hydraulic telescopic rod 13 is fixed to the outer side of the water baffle 6, and the other end of the hydraulic telescopic rod 13 is fixedly connected to the connecting rod. The movable scraper 25 is connected to the water baffle 6 through the hydraulic telescopic rod 13, and the bottom of the movable scraper 25 contacts the top of the filter screen 10, and the top of the movable scraper 25 contacts the top of the inner side of the conveyor mesh belt 20. Through the setting of the hydraulic telescopic rod 13, the extension and contraction of the hydraulic telescopic rod 13 can change the position of the connecting rod fixedly connected thereto, and the connecting rod drives the movable scraper 25 to move. During the movement, the movable scraper 25 scrapes off all impurities adhering to the top of the inner side of the filter screen 10 and the conveyor mesh belt 20, which is convenient for the use of the device. Through the setting of the fixed scraper 7, the fixed scraper 7 can scrape off the Chinese medicinal materials adhering to the bottom of the conveyor mesh belt 20, which is convenient for the infiltration and collection of the Chinese medicinal materials.

[0033] The upper conveying structure is fixed with a guide plate 12 on both sides, the middle conveying structure is fixed with a guide plate 2 11 on both sides, and the lower conveying structure is fixed with a guide plate 3 8 on both sides. The guide plate 12, the guide plate 2 11 and the guide plate 3 8 are all inclined, and the filter screen 10 contacts the high end of the guide plate 12, the high end of the guide plate 2 11 or the high end of the guide plate 3 8. The bottom ends of the guide plate 12, the guide plate 2 11 and the guide plate 3 8 are all located above the impurity collection box 9, and the impurity collection box 9 is provided on both sides of the lower conveying structure. The fixed scraper 7 is fixed with the guide plate 12, the guide plate 2 11 or the guide plate 3 8. Through the arrangement of the guide plate 12, the guide plate 2 11 and the guide plate 3 8, the impurities can be guided, so that the impurities filtered by the filter screen 10 fall into the impurity collection box 9.

[0034] The rotating motor and reflux pump involved in this application are both prior art, and technicians in this field are familiar with their connection methods. Through these people, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed between the electrical components in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0035] In summary: when the medicine-wetting device for processing Chinese herbal medicine slices is used, it can be used in conjunction with the automatic feeding device for Chinese medicinal materials in the prior art (such as a high-efficiency Chinese medicinal material vibration feeding device disclosed in the authorized patent with application number CN202123215338.3). The automatic feeding device puts the Chinese medicinal materials to be infiltrated onto the upper conveying structure, and the rotation of the rotating motor 21 causes the upper conveying structure, the middle conveying structure and the lower conveying structure to rotate. The upper conveying structure drives the Chinese medicinal materials to move. When the Chinese medicinal materials move to the bottom of the spray plate 18, the spray liquid sprayed by the spray plate 18 is sprayed onto the Chinese medicinal materials to achieve the infiltration of the Chinese medicinal materials. The excess spray liquid falls on the filter screen 10 under the action of gravity, and the filter screen 10 filters the spray liquid. The filtered spray liquid falls on the middle conveying structure. The Chinese medicinal materials after one spraying are Under the action of force, it can fall on the middle conveying structure, and the middle conveying structure transports the Chinese medicinal materials. When the Chinese medicinal materials that have been sprayed once move to the bottom of the spray plate 18, the Chinese medicinal materials can be sprayed for the second time. The Chinese medicinal materials that have been sprayed for the second time can fall on the lower conveying structure, and the waste liquid generated by the second spraying is filtered by the filter net 10 below it and then falls on the lower conveying structure. During the process of transporting the Chinese medicinal materials by the lower conveying structure, the Chinese medicinal materials can be sprayed for the third time. The medicinal materials after the third spraying fall into the material collecting box 17, and the waste liquid generated by the three sprayings is filtered by the filter net 10 and then falls into the spray liquid collecting box 15. When the spray liquid collected in the spray liquid collecting box 15 can be extracted by the reflux pump 16, the reflux pump 16 pumps the collected spray liquid into the inner cavity of the spray plate 18, so as to realize the reuse of the spray liquid and reduce the loss of the spray liquid. Furthermore, when the Chinese medicinal materials move to below the spray plate 18, the rotating motor 21 can stop working, so that the Chinese medicinal materials can be sprayed for a long time, thereby improving the adaptability of the device.

[0036] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A medicine-moistening device for processing Chinese herbal medicine slices, comprising a support frame (1), a spray liquid collection box (15) and two impurity collection boxes (9), characterized in that: The inner cavity of the support frame (1) is provided with an upper conveying structure, a middle conveying structure and a lower conveying structure in sequence from top to bottom, and the upper conveying structure is connected to the lower conveying structure through a synchronous belt 1 (24), and the lower conveying structure is connected to the middle conveying structure through a synchronous belt 2 and a gear set, and the movement direction of the lower conveying structure is opposite to that of the middle conveying structure; the upper conveying structure, the middle conveying structure and the lower conveying structure all include a conveying mesh belt (20), and baffles (5) are provided on both sides of the top of the conveying mesh belt (20). A slag removal structure is provided on the inner side of the conveying mesh belt (20), a spray plate (18) is provided above the upper conveying structure, a liquid inlet pipe (22) and a return pipe (23) are fixed to one side of the inner cavity of the spray plate (18), a spray liquid collection box (15) is provided below the lower conveying structure, the inner cavity of the spray liquid collection box (15) is connected to the return pipe (23) via a return pump (16), impurity collection boxes (9) are provided on both sides of the lower conveying structure, and a material receiving box (17) is provided at one end of the lower conveying structure; The slag removal structure comprises a filter screen (10) located on the inner side of the conveyor mesh belt (20), a water baffle (6), a fixed scraper (7) in contact with the bottom of the conveyor mesh belt (20), and a movable scraper (25) located on the inner side of the conveyor mesh belt (20), the filter screen (10) is fixed with a water baffle (6) at both ends, the movable scraper (25) is connected to a water baffle (6) via a hydraulic telescopic rod (13), the bottom of the movable scraper (25) is in contact with the top of the filter screen (10), and the top of the movable scraper (25) is in contact with the top of the inner side of the conveyor mesh belt (20).

2. A medicine-moistening device for processing Chinese herbal medicine slices according to claim 1, characterized in that: The spray plate (18) is located directly above the spray liquid collection box (15) and the filter screen (10), and the spray plate (18) is fixedly connected to the support frame (1).

3. A medicine-moistening device for processing Chinese herbal medicine slices according to claim 1, characterized in that: The upper conveying structure comprises two upper rollers (2) movably connected to the support frame (1), and the two upper rollers (2) are connected in transmission via a conveying mesh belt (20); the middle conveying structure comprises two middle rollers (3) movably connected to the support frame (1), and the two middle rollers (3) are connected in transmission via another conveying mesh belt (20); the lower conveying structure comprises two lower rollers (4) movably connected to the support frame (1), and the two lower rollers (4) are connected in transmission via another conveying mesh belt (20).

4. A medicine-moistening device for processing Chinese herbal medicine slices according to claim 3, characterized in that: A groove is provided at one end of the water baffle (6) away from the filter screen (10), and the upper roller (2), the middle roller (3) or the lower roller (4) is movably connected to the inner cavity of the groove.

5. The medicine-moistening device for processing Chinese herbal medicine slices according to claim 1, characterized in that: One end of the movable scraper (25) is fixedly connected to a connecting rod, a water baffle (6) is provided with a through groove adapted to the connecting rod, a hydraulic telescopic rod (13) is fixed to the outer side of the water baffle (6), and the other end of the hydraulic telescopic rod (13) is fixedly connected to the connecting rod.

6. A medicine-lubricating device for processing Chinese herbal medicine slices according to claim 1, characterized in that: A guide plate (19) is provided at one end of the lower conveying structure close to the material receiving box (17); the guide plate (19) is inclined; the upper end of the guide plate (19) is fixedly connected to the support frame (1); and the lower end of the guide plate (19) is located above the material receiving box (17).

7. A medicine-moistening device for processing Chinese herbal medicine slices according to claim 1, characterized in that: A guide plate 1 (12) is fixed on both sides of the upper conveying structure, a guide plate 2 (11) is fixed on both sides of the middle conveying structure, and a guide plate 3 (8) is fixed on both sides of the lower conveying structure. The guide plate 1 (12), the guide plate 2 (11) and the guide plate 3 (8) are all inclined. The filter screen (10) contacts the high end of the guide plate 1 (12), the high end of the guide plate 2 (11) or the high end of the guide plate 3 (8). The bottom ends of the guide plate 1 (12), the guide plate 2 (11) and the guide plate 3 (8) are all located above the impurity collection box (9). The fixed scraper (7) is fixed to the guide plate 1 (12), the guide plate 2 (11) or the guide plate 3 (8).

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