Device for feeding fermented grains into cellar

Abstract

The utility model belongs to the technical field of white spirit brewing, and particularly relates to a fermented grain cellar entering device which comprises a sieve plate, a scattering mechanism and a spraying mechanism, the sieve plate is used for being placed above a cellar, a circle of enclosure is arranged on the edge of the sieve plate and extends upwards, the scattering mechanism is arranged above the sieve plate, and the spraying mechanism is arranged above the scattering mechanism. The scattering mechanism can move parallel to the upper portion of the screen plate, and the spraying mechanism is arranged below the screen plate and used for spraying feint to fermented grains falling into the pit along screen holes of the screen plate. According to the fermentation tank, the looseness of fermented grains falling into the fermentation tank can be guaranteed, the temperature uniformity of the fermented grains in the fermentation tank can be more conveniently controlled, and after-run spraying is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the liquor brewing technical field, concretely relates to a kind of pit entry device for fermented grains. BACKGROUND

[0002] Liquor is the traditional distillate of our country, and is listed as one of the world's six major distillates, with a long history and profound cultural heritage. The production method of Chinese liquor can be divided into three kinds: solid-state fermentation, liquid-state fermentation and solid-liquid fermentation. Most of the commonly used production methods of liquor are solid-state fermentation. Pit entry fermentation, as an important part of the production process, is very important for the formation of liquor flavor and quality. However, the whole fermentation process of pit entry fermentation is completed in a completely closed condition, making it difficult to control the fermentation state. In actual production, the pit entry operation before pit entry fermentation has a great influence on the fermentation in the pit, directly affecting the yield and quality of liquor.

[0003] At present, the pit entry operation of most distilleries has been following the traditional operation method, that is, the fermented grains are scooped open, and the pit is entered while spraying liquor tail. This method is labor-intensive, and the efficiency is not high. It is greatly affected by manual operation, and it is difficult to ensure that the fermented grains in the pit are completely dispersed. The fermented grains may accumulate unevenly in the pit, resulting in uneven temperature of fermented grains in the pit and affecting fermentation. In order to improve the efficiency of fermented grains entering the pit, some pit entry devices are proposed in the prior art, such as a white liquor displacement pit entry device with the publication number CN219546173U. Although this kind of device improves the efficiency of fermented grains entering the pit to some extent, it is only used to assist fermented grains entering the pit, and cannot control the looseness of fermented grains when entering the pit. It is not conducive to the control of the uniformity of the temperature of fermented grains in the pit, and the liquor tail is sprayed from top to bottom along the discharge bin, which may cause uneven spraying of liquor tail in the upper and lower layers of the discharge bin. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to provide a fermented grains pit entry device that can guarantee the looseness of fermented grains falling into the pit, facilitate the control of the uniformity of the temperature of fermented grains in the pit, and make the spraying of liquor tail more uniform.

[0005] The content of the utility model includes a sieve plate, a dispersing mechanism and a spraying mechanism. The sieve plate is used to be placed above the pit. The edge of the sieve plate is provided with a ring of enclosure. The enclosure extends upward. The dispersing mechanism is arranged above the sieve plate and can move parallel to the top of the sieve plate. The spraying mechanism is arranged below the sieve plate and is used to spray liquor tail to the fermented grains falling into the pit along the sieve holes of the sieve plate.

[0006] Further, a plurality of temperature detection modules are included. The plurality of temperature detection modules are arranged below the sieve plate, and the heights of the plurality of temperature detection modules below the sieve plate are different.

[0007] Further, a plurality of mounting holes are arranged on the screen plate, and one end of each of the temperature detection modules is detachably connected in a corresponding mounting hole.

[0008] Further, the screen plate comprises a screen, an outer frame and a plurality of intermediate beams, the screen is fixedly arranged in the outer frame, the plurality of intermediate beams are arranged in the outer frame at intervals and fixed with the screen, the enclosure is arranged on the outer frame, and the spraying mechanism comprises a plurality of spraying pipes, and the plurality of spraying pipes are arranged at the bottom of the plurality of intermediate beams correspondingly.

[0009] Further, two or more groups of spraying structures are arranged on each of the spraying pipes, each group of the spraying structures comprises a plurality of spray holes arranged at intervals along the axial direction of the spraying pipe, the spray holes in each group of the spraying structures are oriented in the same direction, and the spray holes in the two or more groups of the spraying structures are oriented in different directions.

[0010] Further, two or more rotating nozzles are arranged at intervals along the axial direction of each of the spraying pipes, and the two or more rotating nozzles are oriented in the same direction.

[0011] Further, the moving frame is further provided, the moving frame is a door-shaped structure, the moving frame is arranged across the screen plate, two sides of the moving frame are located on two sides of the screen plate correspondingly, and the top of the moving frame is located above the screen plate, and the scattering mechanism is arranged on the moving frame.

[0012] Further, the scattering mechanism comprises a rotating rod, a gear rod and a rotating driving member, both sides of the enclosure are provided with a strip-shaped through slot and a flexible curtain, the flexible curtain is used for shielding the strip-shaped through slot, both ends of the rotating rod pass through the strip-shaped through slots and the flexible curtains on both sides of the enclosure correspondingly, and both ends of the rotating rod are rotatably connected to both sides of the moving frame, the gear rod is arranged on the side surface of the rotating rod, and the rotating driving member is arranged on one side of the moving frame and connected to the rotating rod.

[0013] Further, two slide rails are further provided, the two slide rails are located on two sides of the screen plate correspondingly, the bottom of each of the two sides of the moving frame is provided with a moving wheel, and the moving wheel is in sliding fit with the slide rail on the same side.

[0014] Further, a bottom plate is further provided, the screen plate and the two slide rails are arranged on the bottom plate, and a through hole is arranged in the middle of the bottom plate to expose the screen plate.

[0015] The utility model discloses beneficial effect is: can realize the control of the loose degree of the fermented grains when the fermented grains enter the cellar and the spraying of the wine tail to the fermented grains simultaneously. When using, the sieve plate is placed above the cellar pool, the fermented grains are poured on the sieve plate, the loose fermented grains directly fall into the cellar pool through the sieve hole of the sieve plate, and the fermented grains that gather on the corresponding position of the surface of the sieve plate are scattered under the action of the scattering mechanism and directly fall into the cellar pool through the sieve hole of the sieve plate, so that the loose degree of the fermented grains falling into the cellar pool is guaranteed, and the control of the uniformity of the temperature of the fermented grains in the cellar pool is more convenient. The setting of the fence can play the role of lateral material blocking when the fermented grains are scattered, and the fermented grains are prevented from splashing outward. The fermented grains are contacted with the sprayed wine tail during the process of continuously falling along the sieve plate to the cellar pool and after falling into the cellar pool, the situation that the bottom fermented grains cannot be sprayed to the wine tail is avoided, and the spraying of the wine tail is more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the first visual angle structural schematic drawing of the utility model fermented grains enter cellar device implementation mode one.

[0017] Figure 2 It is the second visual angle structural schematic drawing of the utility model fermented grains enter cellar device implementation mode one.

[0018] Figure 3 It is the structural schematic drawing of the utility model fermented grains enter cellar device implementation mode two.

[0019] In the drawing: 1, sieve plate;11, screen;12, outer frame;13, middle beam;14, mounting hole;2, fence;21, strip-shaped through slot;22, flexible curtain;3, moving frame;31, moving wheel;4, scattering mechanism;41, rotating rod;42, rack;43, rotary drive part;5, spraying pipe;6, temperature detection module;7, slide rail;8, bottom plate. SPECIFIC EMBODIMENT

[0020] As Figures 1-3 The utility model provides a kind of fermented grains enter cellar device, including sieve plate 1, scattering mechanism 4 and spraying mechanism.The sieve plate 1 is used to place above cellar pool, i.e. for placing at cellar pool top, the size of sieve plate 1 is slightly greater than cellar pool top size, so that sieve plate 1 can be placed directly above cellar pool top without falling into cellar pool interior.The size of sieve plate 1 screen hole is set to be crossed by loose fermented grains that meet the requirement of entering cellar.The edge of sieve plate 1 is provided with a circle fence 2, the fence 2 is extended upwards and is formed lateral material blocking structure above the edge of sieve plate 1.The scattering mechanism 4 is set above sieve plate 1, for scattering the fermented grains on the surface of sieve plate 1, and scattering mechanism 4 can be moved parallel to above sieve plate 1, so that scattering mechanism 4 can meet the scattering demand of fermented grains at different positions above sieve plate 1.The spraying mechanism is set below sieve plate 1, for spraying wine tail to fermented grains falling into cellar pool along sieve plate 1 sieve hole.

[0021] The wine lees pit entering device provided by the utility model can control the looseness of wine lees and spray wine tail to wine lees at the same time when wine lees enter the pit. When in use, the sieve plate 1 is placed above the pit pool, wine lees are poured on the sieve plate 1, the loose wine lees directly fall into the pit pool through the sieve holes of the sieve plate 1, and the wine lees gathered at the corresponding positions on the surface of the sieve plate 1 are scattered under the action of the scattering mechanism 4 and directly fall into the pit pool through the sieve holes of the sieve plate 1, so that the looseness of the wine lees falling into the pit pool is guaranteed, and the temperature uniformity of the wine lees in the pit pool is more convenient to control. The setting of the fence 2 can play a role in laterally blocking materials when the wine lees are scattered, so that the wine lees are prevented from splashing outward. Since the spraying mechanism is arranged below the sieve plate 1, the wine lees are contacted with the sprayed wine tail during the process of continuously falling along the sieve plate 1 to the pit pool and after falling into the pit pool, compared with the mode of spraying wine tail above the sieve plate 1, the utility model can avoid the situation that the bottom wine lees cannot be sprayed with wine tail, and the spraying of wine tail is more uniform.

[0022] The utility model also includes several temperature detection modules 6, several temperature detection modules 6 are all arranged below the sieve plate 1, and the heights of the several temperature detection modules 6 below the sieve plate 1 are different, that is, the depths of the temperature detection modules 6 extending into the pit pool are different. Based on the setting, the temperature of different depth areas of the pit pool can be detected during the process of wine lees entering the pit, so that the operator can carry out corresponding temperature control operation on the pit pool.

[0023] The sieve plate 1 is provided with several mounting holes 14, and one end of the several temperature detection modules 6 is detachably connected in the corresponding mounting hole 14. Specifically, a single temperature detection module 6 includes a connecting rod and a temperature measuring unit arranged at the bottom of the connecting rod, the temperature measuring unit can be a temperature sensor or other device and is electrically connected with an external controller, and the detected temperature signal is fed back to the external controller. The top of the connecting rod is arranged in the corresponding mounting hole 14 and is fixed in the mounting hole 14 by buckling or threaded connection, so that the temperature detection module 6 is detachably connected with the mounting hole 14, the lengths of the connecting rods of the temperature detection modules 6 are different, so that the depths of the temperature detection modules 6 extending into the pit pool are different. Based on the setting, the temperature detection module 6 and the sieve plate 1 can be detached, after the temperature detection module 6 is detached, the height of the whole device can be greatly reduced, and the whole device is more convenient to move and place.

[0024] The sieve plate 1 includes a screen 11, an outer frame 12 and several intermediate beams 13, the screen 11 is fixedly arranged in the outer frame 12, the several intermediate beams 13 are arranged in the outer frame 12 at intervals and are fixed with the screen 11, and the fence 2 is arranged on the outer frame 12. In the utility model, the screen 11 is used for screening wine lees, the outer frame 12 and the intermediate beams 13 are used for increasing the structural strength of the screen 11 and bearing corresponding forces as the main force bearing structure, so as to guarantee the bearing capacity of the whole sieve plate 1 and reduce the deformation of the screen 11. The mounting hole 14 is specifically arranged on the intermediate beam 13 in the middle.

[0025] The spraying mechanism comprises a plurality of spraying pipes 5, and the plurality of spraying pipes 5 are correspondingly arranged at the bottom of the plurality of middle beams 13. Based on the arrangement, the area where the screen 11 is located can be avoided, on the one hand, the screen 11 below is not blocked to affect the falling of the fermented grains, and on the other hand, the fermented grains cannot fall on the spraying pipe 5 to cause the blockage of the spray holes. The middle beam 13 with the mounting hole 14 is not provided with the spraying pipe 5, or the spraying pipe 5 is arranged at the bottom of the middle beam 13 to avoid the mounting hole 14.

[0026] In one arrangement mode of the utility model, two groups or more spraying structures are arranged on a single spraying pipe 5, and a single group of spraying structures comprises a plurality of spray holes arranged along the axial direction of the spraying pipe 5, that is, in this arrangement mode, the spray holes are directly arranged on the spraying pipe 5 to spray the wine tail. The directions of the spray holes in a single group of spraying structures are the same, and the directions of the spray holes in two groups or more spraying structures are different, for example, the spray holes in one group of spraying structures are arranged to the left and downward, and the spray holes in the other group of spraying structures are arranged to the right and downward. Based on the arrangement, the spraying range of the spraying mechanism can more comprehensively cover the internal area of the pit pool, and the uniformity of spraying the wine tail is further improved.

[0027] In another arrangement mode of the utility model, two or more rotating nozzles are arranged on a single spraying pipe 5 along the axial direction, and the rotating nozzles are all arranged in the same direction. In this arrangement mode, the spraying pipe 5 is used as a wine tail conveying pipe and a rotating nozzle mounting pipe, and the wine tail is sprayed out of the rotating nozzle. Due to the structural characteristics of the rotating nozzle, the rotating nozzle can rotate during spraying the wine tail, so that the spraying range of the spraying mechanism can more comprehensively cover the internal area of the pit pool, and the uniformity of spraying the wine tail is further improved.

[0028] In the utility model, the spraying pipe 5 is connected with the wine tail barrel through the connecting pipe, and the wine tail in the wine tail barrel is conveyed to the spraying pipe 5 through the water pump. The height of the sieve plate 1 is the direction perpendicular to the surface of the screen 11, and preferably in the sieve plate 1, the height of the outer frame 12 is greater than the height of the middle beam 13, so that in the direction perpendicular to the surface of the screen 11, the bottom of the middle beam 13 is higher than the bottom of the outer frame 12. After the spraying pipe 5 is installed at the bottom of the middle beam 13, the spraying pipe 5 is located between the height difference between the bottom of the middle beam 13 and the bottom of the outer frame 12, so as to facilitate the movement and placement of the whole sieve plate 1.

[0029] The utility model discloses a movable frame 3, the movable frame 3 is the door type structure, and the movable frame 3 is arranged across the sieve plate 1, and the both sides of movable frame 3 correspond to be located at the both sides of sieve plate 1, and the top of movable frame 3 is located above sieve plate 1, and the beating mechanism 4 is arranged on movable frame 3. By pushing movable frame 3 moves, to make beating mechanism 4 parallel to the sieve plate 1 above movement, to beat the different positions of the sieve plate 1 above the fermented grains and scatter. And by adopting the movable frame 3 of door type structure, the support of beating mechanism 4 and the stability in the moving process are higher.

[0030] The beating mechanism 4 includes rotating rod 41, rack 42 and rotary drive 43, both sides of the enclosure 2 are provided with strip-shaped through slot 21 and flexible curtain 22, the flexible curtain 22 is specifically arranged inside both sides of the enclosure 2, is used for shielding strip-shaped through slot 21, and the both sides of the enclosure 2 where strip-shaped through slot 21 and flexible curtain 22 are located correspond to the both sides of movable frame 3, rotating rod 41 is arranged across above sieve plate 1, one end of rotating rod 41 passes through the strip-shaped through slot 21 and flexible curtain 22 of one side of the enclosure 2 and is rotationally connected with one side of movable frame 3, the other end of rotating rod 41 passes through the strip-shaped through slot 21 and flexible curtain 22 of the other side of the enclosure 2 and is rotationally connected with the other side of movable frame 3. Among them, the flexible curtain 22 specifically includes several flexible strip-shaped parts, several flexible strip-shaped parts are sequentially arranged along the length direction of strip-shaped through slot 21, and the upper end of several flexible strip-shaped parts is fixed with the position of the inside of the enclosure 2 above strip-shaped through slot 21, to form the flexible curtain 22 shielding strip-shaped through slot 21.

[0031] The rack 42 is arranged on the side of rotating rod 41, and the rack 42 has several, and the several racks 42 are distributed along the axial direction and the circumferential direction of the side of rotating rod 41. Preferably, the rack 42 is cylindrical, which can reduce damage to the surface of the fermented grains during beating. The rotary drive 43 is arranged on the top of the movable frame 3 and connected with the rotating rod 41, the rotary drive 43 is arranged on one side of the movable frame 3 and connected with the rotating rod 41, and the rotary drive 43 is specifically a motor.

[0032] Based on the setting mode of the above beating mechanism 4, the flexible curtain 22 naturally droops in the natural state, shields the strip-shaped through slot 21, and avoids the fermented grains from splashing outside the enclosure 2 when being beaten. Due to the structural characteristics of the flexible curtain 22, the rotating rod 41 can normally pass through the flexible curtain 22 when moving along the length direction of the strip-shaped through slot 21, so that the rotating rod 41 can normally move along the enclosure 2, and at the same time, the end of the rack 42 is not higher than or less higher than the top of the enclosure 2 when the rack 42 faces upward, and the distance between the end of the rack 42 and the surface of the sieve 11 is small when the rack 42 faces downward, thereby ensuring the effectiveness of the enclosure 2 in blocking materials and the effectiveness of the beating mechanism 4 in beating the fermented grains.

[0033] The utility model also includes two slide rails 7, two slide rails 7 correspond to be located at both sides of sieve plate 1, and the length direction of two slide rails 7 and the length direction of strip-shaped through groove 21 are same direction. The bottom of both sides of mobile frame 3 is provided with movable wheel 31, movable wheel 31 and the slide of its side slide rail 7 is matched. Based on this setting, on the one hand, the friction of the whole movement of mobile frame 3 can be improved, thereby reducing the required force for pushing mobile frame 3, on the other hand, the movement of mobile frame 3 can be guided, and the reliability of the movement is improved.

[0034] In one setting mode of the utility model, two slide rails 7 are directly arranged at both sides of the top of the cellar, that is, in this setting mode, the slide rail 7 and the sieve plate 1 are arranged in a split type, and in this setting mode, a lifting eye is fixedly arranged on the outer frame 12 for connection with the lifting part of the hoisting device.

[0035] In the preferred setting mode of the utility model, the utility model also includes a bottom plate 8, the sieve plate 1 and the two slide rails 7 are arranged on the bottom plate 8, and the middle part of the bottom plate 8 is throughly arranged to expose the bottom of the sieve plate 1, that is, in this setting mode, the slide rail 7 and the sieve plate 1 are relatively fixed, and the single fermented grains cellar entering device can be moved by the hoisting device for different cellars, and there is no need to arrange rails on both sides of the top of each cellar. The lifting eye is fixedly arranged on the bottom plate 8 or the outer frame 12 for connection with the lifting part of the hoisting device. The two ends of the slide rail 7 are provided with limiting parts to prevent the movable wheel 31 from coming out.

[0036] The movement of the mobile frame 3 can be directly pushed by manual operation, or a driving mechanism is arranged at the bottom of the mobile frame 3 to drive the movable wheel 31 to rotate and drive the mobile frame 3 to move. Or a linear driving mechanism is arranged on the side of the rail along the length direction of the rail, and the mobile frame 3 is connected to the linear driving mechanism to push the mobile frame 3 to move.

[0037] In one embodiment of the utility model, the number of the scattering mechanism 4 is one, that is, as shown in Figure 1 and Figure 2 In another embodiment of the utility model, the number of the scattering mechanism 4 is two, and in this embodiment, the number of the mobile frame 3 is also two, and the single scattering mechanism 4 is arranged on the single mobile frame 3, and the two mobile frames 3 are correspondingly located at the two ends of the two slide rails 7, that is, as shown in Figure 3 Based on this embodiment, more areas on the surface of the sieve plate 1 can be simultaneously scattered, the uniformity of the distribution of the fermented grains when falling into the cellar is improved, and the operation of the subsequent operator to flatten the fermented grains in the cellar is reduced.

[0038] In the utility model, the wine lees is poured on the sieve plate 1, and the feeding operation can be carried out through a belt feeder or other feeders, or the wine lees can be directly spaded on the sieve plate 1 by manual operation, and the specific operation can be determined according to the actual situation. When the wine lees is attached to the inner side of the fence 2, the corresponding mechanism can be manually closed according to the actual situation, and the operation of dispersing and spraying is stopped, and the wine lees on the fence 2 is spaded to the surface of the sieve plate 1 by manual operation, and then the corresponding operation is carried out, so that the safety is guaranteed.

[0039] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of protection of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above, which are not provided in details for the sake of simplicity.

[0040] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A device for feeding fermented mash into a cellar, characterized in that, It includes a sieve plate (1), a dispersing mechanism (4) and a spraying mechanism. The sieve plate (1) is used to be placed above the cellar. A ring of barriers (2) is provided around the edge of the sieve plate (1). The barriers (2) extend upward. The dispersing mechanism (4) is located above the sieve plate (1) and can move parallel to the top of the sieve plate (1). The spraying mechanism is located below the sieve plate (1) and is used to spray the mash that falls into the cellar along the sieve holes of the sieve plate (1) with the tail of the wine.

2. The fermentation mash feeding device as described in claim 1, characterized in that, It also includes several temperature detection modules (6), all of which are located below the sieve plate (1), and the several temperature detection modules (6) are at different heights below the sieve plate (1).

3. The fermentation mash feeding device as described in claim 2, characterized in that, The sieve plate (1) is provided with several mounting holes (14), and one end of several temperature detection modules (6) can be detachably connected to the corresponding mounting holes (14).

4. The fermentation mash feeding device as described in any one of claims 1-3, characterized in that, The sieve plate (1) includes a sieve (11), an outer frame (12) and several intermediate beams (13). The sieve (11) is fixedly installed inside the outer frame (12). Several intermediate beams (13) are spaced apart in the outer frame (12) and fixed to the sieve (11). The enclosure (2) is installed on the outer frame (12). The spraying mechanism includes several spray pipes (5). Several spray pipes (5) are correspondingly installed at the bottom of several intermediate beams (13).

5. The fermentation mash feeding device as described in claim 4, characterized in that, A single spray pipe (5) is provided with two or more sets of spray structures. Each set of spray structures includes several spray holes spaced apart along the axial direction of the spray pipe (5). The spray holes in a single set of spray structures have the same orientation, while the spray holes in two or more sets of spray structures have different orientations.

6. The fermentation mash feeding device as described in claim 4, characterized in that, Two or more rotating nozzles are arranged axially on a single spray pipe (5), and the two or more rotating nozzles are all facing the same direction.

7. The fermentation mash feeding device as described in any one of claims 1-3, 5, and 6, characterized in that, It also includes a movable frame (3), which is a gate-shaped structure. The movable frame (3) is set across the screen plate (1). The two sides of the movable frame (3) are located on the two sides of the screen plate (1), and the top of the movable frame (3) is located above the screen plate (1). The dispersing mechanism (4) is set on the movable frame (3).

8. The fermentation mash feeding device as described in claim 7, characterized in that, The dispersing mechanism (4) includes a rotating rod (41), a toothed rod (42), and a rotary drive (43). Both sides of the enclosure (2) are provided with strip-shaped through slots (21) and flexible curtains (22). The flexible curtains (22) are used to cover the strip-shaped through slots (21). The two ends of the rotating rod (41) pass through the strip-shaped through slots (21) and flexible curtains (22) on both sides of the enclosure (2) and are rotatably connected to both sides of the moving frame (3). The toothed rod (42) is located on the side of the rotating rod (41). The rotary drive (43) is located on one side of the moving frame (3) and is connected to the rotating rod (41).

9. The fermentation cellar feeding device as described in claim 7, characterized in that, It also includes two slide rails (7), which are located on both sides of the sieve plate (1). The bottom of both sides of the movable frame (3) is provided with movable wheels (31), which slide in cooperation with the slide rail (7) on their respective sides.

10. The fermentation cellar feeding device as described in claim 9, characterized in that, It also includes a base plate (8), on which the sieve plate (1) and two slide rails (7) are arranged, and the middle of the base plate (8) is through so that the bottom of the sieve plate (1) is exposed.

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