Process for producing sauced wine from highland barley

Abstract

The invention relates to the field of highland barley wine brewing, in particular to a process for producing sauced wine from highland barley. According to the technology for producing the sauced wine by using the highland barley, the highland barley is stir-fried by using the highland barley stir-frying equipment, the rotary pan drives the scraper blade to continuously stir the highland barley, the granular salt and the fine sand, and the highland barley is stir-fried; the scraping blade continuously turns the highland barley at the bottom of the rotating pan upwards and detects the highland barley in a rolling state through the image detection mechanism, the image detection mechanism detects the colors of the fed highland barley in sequence, and when the image detection mechanism detects that the colors of most areas of the highland barley exceeding 95% are slightly burnt, the highland barley is output; the stir-frying work of the highland barley reaches the standard. The technical problem that the taste of the brewed sauced wine product is affected due to the fact that the stir-frying treatment of the highland barley does not reach the standard because the produced slight charring phenomenon cannot be identified and judged by industrialized mechanical equipment during stir-frying work of the highland barley is solved.

Description

Technical Field

[0001] The invention relates to the field of highland barley wine making, and in particular to a process for producing sauce wine by using highland barley. Background Art

[0002] Before brewing, highland barley needs to be cleaned and stir-fried with granular salt. At the same time, adding fine sand and stir-frying with the highland barley can improve the uniformity of the frying of the highland barley. After frying, the highland barley can be subjected to subsequent fermentation and distillation steps to brew a sauce-flavored liquor product. During the frying of the highland barley, the manual judgment standard for the end of the frying of the highland barley is that the highland barley is slightly burnt after frying. However, with the industrialized mechanical transformation of highland barley sauce-flavored liquor brewing, the industrialized mechanical equipment cannot refer to the judgment standard for the end of the barley frying work during the manual frying work. Therefore, the highland barley frying work can only be completed by using the timed frying method, which easily leads to a large number of highland barley being not properly stir-fried or over-fried, seriously affecting the taste of the subsequent sauce-flavored liquor products brewed from the highland barley. Summary of the invention

[0003] In order to overcome the disadvantage that industrialized mechanical equipment cannot identify and determine the slight burning phenomenon produced during the stir-frying of highland barley, resulting in substandard stir-frying of highland barley and affecting the taste of the brewed sauce-flavored liquor product, the present invention provides a process for producing sauce-flavored liquor using highland barley.

[0004] The present invention provides a process for producing sauce wine using highland barley, comprising the following steps: Step 1: Wash and dry the highland barley to obtain clean highland barley; Step 2: Put highland barley, granular salt and fine sand into a highland barley stir-frying device for stir-frying, so that the granular salt is evenly melted on the highland barley; Step 3, on the basis of step 2, continuously detecting the color of the stir-fried highland barley in sequence, until 95% of the continuously detected highland barley colors have a slight burnt phenomenon, indicating that the stir-frying work of the highland barley has reached the standard; Step 4, sieving the stir-fried highland barley and fine sand; Step five, fermentation and distillation, the separated highland barley is fermented and distilled to obtain a brewing product.

[0005] A highland barley stir-frying device comprises a mounting frame, an outer shell, a stove, a temperature-insulating plate, an electrically controlled rotary machine, a fixed cylinder, a driving motor, a gear, a gear ring, a guide plate, a rotating pot, a scraper, a fixed ring and an image detection mechanism; the mounting frame is connected to the outer shell; the stove is installed in the outer shell; two electrically controlled rotary machines are installed on the mounting frame; a fixed cylinder is fixedly connected between the rotating parts of the two electrically controlled rotary machines; a hollow groove structure aligned with the stove is provided at the bottom of the fixed cylinder; a rotating pot is rotatably connected in the fixed cylinder; a temperature-insulating plate is provided on the stove; the driving motor is installed on the fixed cylinder; a gear is fixedly connected to the output shaft of the driving motor; a gear ring is fixedly connected to the rotating pot; the gear ring meshes with the gear; a guide plate aligned with the lower side of the opening end of the rotating pot is fixedly connected to the fixed cylinder; a plurality of scrapers for turning up highland barley in sequence are fixedly connected around the inner wall of the rotating pot; a fixed ring is fixedly connected to the fixed cylinder; an image detection mechanism for detecting the color of highland barley in the rotating pot is connected to the fixed ring.

[0006] Furthermore, the image detection mechanism includes a fixed frame, a collecting bucket, an S-shaped pipe, an image recognition sensor, an inner sand screening net, spring pieces and a baffle; the fixed frame is fixedly connected to the fixed ring; the collecting bucket is fixedly connected to the fixed frame; the collecting bucket is connected to the S-shaped pipe; an image recognition sensor is installed in the middle of the S-shaped pipe; the inner sand screening net is fixedly connected to the lower side of the inlet end of the S-shaped pipe; a number of spring pieces are fixedly connected to the inner sand screening net; a baffle is fixedly connected to the inner sand screening net, the baffle is located on the right side of the spring piece, and the height of the baffle is lower than the height of the spring piece.

[0007] Furthermore, the outer shell is slidably connected to a mounting frame; an electric-controlled lifter is installed on the mounting frame to drive the outer shell to move in an up-and-down direction.

[0008] Furthermore, a suction cylinder is fixedly connected to the S-shaped pipe, and a suction port of the suction cylinder is aligned with the inner sand screening net.

[0009] Furthermore, an outer sand screening net for filtering fine sand is detachably fixed on the fixing ring.

[0010] Furthermore, a leakage groove structure is provided at the bottom of the fixing ring.

[0011] Furthermore, the fixed ring is slidably connected to the rotating pot; an electrically controlled telescopic push rod is installed on the rotating pot to push the fixed ring to move in the front-rear direction.

[0012] Further, the drain trough structure is initially hidden inside the rotary pot.

[0013] Furthermore, a scraper is fixedly connected to the edge of the rotary pot outlet end.

[0014] Furthermore, a brush is fixedly connected to the scraper and is in close contact with the outer sand screening net.

[0015] The invention provides a process for producing sauce wine with highland barley, based on a highland barley stir-frying device for stir-frying highland barley. The described highland barley stir-frying device mainly consists of a stove and a rotating pot that can be turned forward and backward, and a scraper and an image detection mechanism are also provided in the rotating pot. The scraper is driven by the rotating pot to continuously stir highland barley, granular salt and fine sand to stir-fry the highland barley. During this process, the scraper continuously turns up the highland barley at the bottom of the rotating pot and transports it to the image detection mechanism for detection. The image detection mechanism detects the color of the highland barley sent in turn, and the highland barley will dynamically pass through the image recognition sensor in a continuous rolling state after bouncing up, so that the image recognition sensor can successively identify multiple angles of the same highland barley. When the image detection mechanism detects that the color of most areas of more than 95% of the highland barley is slightly burnt, it means that the stir-frying of the highland barley has reached the standard. The present invention provides a process for producing sauce wine with highland barley, which solves the technical problem that industrialized mechanical equipment cannot identify and determine the slight burning phenomenon produced during the stir-frying of highland barley, resulting in substandard stir-frying of highland barley and affecting the taste of the brewed sauce wine product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural diagram for describing a highland barley stir-frying device of the present invention; Figure 2 A diagram of a rotating pot structure for describing a highland barley stir-frying device of the present invention; Figure 3 A structural diagram of a guide plate for describing a highland barley stir-frying device of the present invention; Figure 4 A structural diagram of a scraper for describing a highland barley stir-frying device of the present invention; Figure 5 A cross-sectional view of an S-shaped pipeline for describing a highland barley stir-frying device of the present invention; Figure 6 The present invention is a diagram of the fixed ring structure of a highland barley stir-frying device.

[0017] The names and serial numbers of the parts in the figure are: 1-mounting frame, 11-outer shell, 12-stove, 13-electrically controlled lifter, 14-insulation board, 21-electrically controlled rotary machine, 22-fixed cylinder, 220-hollow groove structure, 23-drive motor, 24-gear, 25-gear ring, 26-guide plate, 3-rotating pot, 31-scraper, 32-scraper, 33-brush, 4-fixed ring, 401-leakage trough structure, 41-fixed frame, 42-collection bucket, 43-S-shaped pipe, 44-image recognition sensor, 45-inner sand screening net, 46-electrically controlled telescopic push rod, 47-shrapnel, 48-baffle, 5-suction cylinder, 51-suction pipe, 6-outer sand screening net. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0019] Example 1 A process for producing sauce wine using highland barley comprises the following steps: Step 1: Wash and dry the highland barley to obtain clean highland barley; Step 2: Put highland barley, granular salt and fine sand into a highland barley stir-frying device for stir-frying, so that the granular salt is evenly melted on the highland barley; Step 3, on the basis of step 2, continuously detecting the color of the stir-fried highland barley in sequence, until 95% of the continuously detected highland barley colors have a slight burnt phenomenon, indicating that the stir-frying work of the highland barley has reached the standard; Step 4, sieving the stir-fried highland barley and fine sand; Step five, fermentation and distillation, the separated highland barley is fermented and distilled to obtain a brewing product.

[0020] A highland barley stir-frying device, such as Figure 1-Figure 5 As shown, it includes a mounting frame 1, an outer shell 11, a stove 12, an electric control lift 13, a temperature insulation board 14, an electric control rotary machine 21, a fixed cylinder 22, a driving motor 23, a gear 24, a gear ring 25, a guide plate 26, a rotating pot 3, a scraper 31, a fixed ring 4 and an image detection mechanism; the mounting frame 1 is slidably connected to the outer shell 11; two electric control lifts 13 are installed on the mounting frame 1; the telescopic ends of the two electric control lifts 13 are fixedly connected to the outer shell 11; the stove 12 is installed in the outer shell 11; two electric control rotary machines 21 that are symmetrical to each other are installed on the mounting frame 1; a fixed cylinder 22 is fixedly connected between the rotating parts of the two electric control rotary machines 21; the bottom of the fixed cylinder 22 is provided with a stove alignment The hollow groove structure 220 of the table 12; the rotating pot 3 is rotatably connected in the fixed cylinder 22; the stove 12 is provided with a U-shaped insulation board 14 with an opening facing forward, and the insulation board 14 can concentrate the heat generated by the stove 12 at the bottom of the rotating pot 3; a driving motor 23 is installed on the fixed cylinder 22; the output shaft of the driving motor 23 is fixedly connected to a gear 24; a gear ring 25 is fixedly connected to the rotating pot 3; the gear ring 25 is meshed with the gear 24; a guide plate 26 aligned with the open end of the rotating pot 3 is fixedly connected to the front lower side of the fixed cylinder 22; a number of scrapers 31 are fixedly connected around the inner wall of the rotating pot 3; the scrapers 31 are designed in a curved arc shape; a fixed ring 4 is fixedly connected to the fixed cylinder 22; an image detection mechanism is connected to the fixed ring 4, and the image detection mechanism is located inside the rotating pot 3.

[0021] like Figure 5As shown, the image detection mechanism includes a fixing frame 41, a collecting bucket 42, an S-shaped pipe 43, an image recognition sensor 44, an inner sand screening net 45, a spring 47 and a baffle 48; the fixing frame 41 is fixedly connected to the fixing ring 4; the collecting bucket 42 is fixedly connected to the fixing frame 41, and the inlet end of the collecting bucket 42 is aligned with the inner upper area of ​​the rotary pot 3; the outlet end of the collecting bucket 42 is connected to the S-shaped pipe 43; an image recognition sensor 44 is installed in the middle of the S-shaped pipe 43, and the image recognition sensor 44 is provided with an ambient lighting system for providing lighting to the inside of the S-shaped pipe 43; an inner sand screening net 45 is fixedly connected to the lower side of the inlet end of the S-shaped pipe 43, and the inner sand screening net 45 is set to a structure inclined toward the image recognition sensor 44; a number of springs 47 are fixedly connected to the inner sand screening net 45; a baffle 48 is fixedly connected to the inner sand screening net 45, the baffle 48 is located on the right side of the spring 47, and the height of the baffle 48 is lower than the height of the spring 47.

[0022] In the preparation work of a highland barley stir-frying device of the present invention, first, the staff operates the electric-controlled rotating machine 21 to drive the fixed cylinder 22 and the rotating pot 3 to rotate to a state where the opening faces upward, and then the staff successively pours highland barley, granular salt and fine sand into the rotating pot 3, and then the staff operates the electric-controlled rotating machine 21 to drive the fixed cylinder 22 and the rotating pot 3 to rotate to a state where the opening faces the upper front and downward, so that the highland barley, granular salt and fine sand in the rotating pot 3 are all accumulated forward between the bottom and the side wall of the rotating pot 3.

[0023] Then, the highland barley stir-frying work of the highland barley stir-frying device of the present invention is started. The staff starts the driving motor 23 to drive the gear 24 to rotate, and the gear 24 meshes with the gear ring 25 to drive the rotating pot 3 to rotate, while the highland barley, granular salt and fine sand are kept dumped and accumulated between the bottom and the side wall of the rotating pot 3. At the same time, the staff turns on the stove 12, and the outer shell 11 is pushed by the electric control lift 13 to drive the stove 12 to rise up close to the bottom of the rotating pot 3. The stove 12 directly heats the bottom of the rotating pot 3, and at the same time, the rotating rotating pot 3 continuously stirs the accumulated highland barley, granular salt and fine sand through the scraper 31 to stir them. The granular salt is uniformly melted in the highland barley, and the color of the highland barley appears slightly burnt. At the same time, the scraper 31 will continuously lift up the highland barley and fine sand at the bottom of the rotary pot 3 and transport them to the upper area of ​​the rotary pot 3, so that the lifted highland barley and fine sand slide down along the scraper 31 into the collecting bucket 42, and the highland barley and fine sand pass through the collecting bucket 42 and enter the S-shaped pipe 43 downward, wherein the fine sand directly passes through the mesh structure of the inner sand screening net 45 and falls back to the bottom of the rotary pot 3, while the remaining highland barley is intercepted by the grid structure of the inner sand screening net 45 and bounces to the right through the shrapnel 47, and the highland barley can rely on the spring to The inertia of the spring piece 47 flips and presses it to the right, allowing the highland barley to smoothly pass through the spring piece 47 to the right and then continue to fall into the right side of the S-shaped pipe 43. During this process, some fine sand falls downward on the grid structure of the inner sand screening net 45 and bounces to the right and hits the spring piece 47. However, because the mass of the fine sand is much smaller than the mass of the highland barley, the inertia and height of the fine sand bouncing to the right are much smaller than the inertia and height of the highland barley bouncing to the right, so that the fine sand cannot flip the spring piece 47 to the right and can only fall downward and pass through the mesh structure of the inner sand screening net 45 and fall back to the bottom of the rotary pot 3, completing the screening of fine sand and highland barley, as shown in FIG. The image recognition sensor 44 timely performs image recognition on the surface colors of each barley that falls into the right side of the S-shaped pipe 43 one after another, and determines whether the surface of the barley is slightly burnt. When the barley bounces to the right from the sand screening net 45 and passes through the image recognition sensor 44, the barley will dynamically pass through the image recognition sensor 44 in a continuous rolling state, allowing the image recognition sensor 44 to successively recognize multiple angles of the same barley, until the image recognition sensor 44 continuously recognizes that most areas of 95% of the barley are slightly burnt, indicating that the stir-frying of the barley has met the standards.

[0024] When the highland barley entering the S-shaped pipe 43 downward is intercepted by the grid structure of the inner sand screening net 45 and bounces to the right through the spring piece 47, a large gap will exist between the spring piece 47 and the adjacent spring piece 47. At this time, a small amount of fine sand that bounces to the right passes through the gap and avoids the obstruction of the spring piece 47. However, since the height of the fine sand bouncing to the right is relatively small, even if there is a phenomenon of fine sand bouncing to the right passing through the spring piece 47, the fine sand will continue to be blocked by the baffle 48 and fall downward and pass through the mesh structure of the inner sand screening net 45 and fall back to the bottom of the rotary pot 3, thereby preventing a large amount of fine sand from entering the right side of the S-shaped pipe 43 and interfering with the image recognition processing effect of the image recognition sensor 44 on the highland barley.

[0025] When the stir-frying of the highland barley is finished, the staff only needs to turn off the driving motor 23 and the stove 12, and place the highland barley collecting bucket in front of the guide plate 26, and then operate the electronically controlled rotating machine 21 to drive the fixed cylinder 22 and the rotating pot 3 to rotate until the opening is facing forward and downward to align with the highland barley collecting bucket, so that the highland barley in the rotating pot 3 that has completed the stir-frying work can be directly poured forward along the guide plate 26 and collected in the highland barley collecting bucket.

[0026] Example 2 On the basis of Example 1, Figure 1-Figure 5 As shown, a suction cylinder 5 is fixedly connected to the S-shaped pipe 43 of this embodiment, and the suction port of the suction cylinder 5 is aligned with the inner sand screening net 45; a suction pipe 51 is connected to the suction cylinder 5; the staff connects the suction pipe 51 to a suction machine, and during the frying of highland barley, the highland barley will continuously produce black smoke in the rotary pot 3. At this time, the external suction machine promptly performs suction work on the suction cylinder 5 through the suction pipe 51, and the suction cylinder 5 quickly sucks away the black smoke floating around the S-shaped pipe 43, so as to avoid a large amount of black smoke pouring into the S-shaped pipe 43 and interfering with the detection work of the image recognition sensor 44.

[0027] Example 3 On the basis of Example 1, Figure 1-Figure 6 As shown, the outer sand screening net 6 is detachably fixed on the fixed ring 4 of this embodiment through a plug-in structure; the fixed ring 4 is slidably connected to the rotary pot 3; two electrically controlled telescopic push rods 46 are installed on the rotary pot 3; the telescopic ends of the two electrically controlled telescopic push rods 46 are commonly fixed to the fixed ring 4; a leakage groove structure 401 is opened at the bottom of the fixed ring 4; the leakage groove structure 401 is initially hidden inside the rotary pot 3; a number of scrapers 32 are fixed to the edge of the outlet end of the rotary pot 3; each scraper 32 is fixed with a brush 33; all brushes 33 are close to the outer sand screening net 6.

[0028] During the preparation work, the staff operates the electric control rotating machine 21 to drive the fixed cylinder 22 and the rotating pot 3 to rotate to the open upward state, and then the staff pulls out the outer sand screening net 6 upward through the plug-in structure of the fixed ring 4, and pours the barley, granular salt and fine sand into the rotating pot 3 in turn. Thereafter, the outer sand screening net 6 is re-fixed in the plug-in structure of the fixed ring 4 for subsequent barley stir-frying, so that the granular salt is evenly melted in the barley and the color of the barley appears slightly burnt.

[0029] After finishing the stir-frying of the highland barley, the staff first places the fine sand recovery bucket in front of the guide plate 26, and then controls the electric control rotating machine 21 to drive the fixed cylinder 22 and the rotary pot 3 to rotate until the opening is facing forward and downward to align with the inclined state of the fine sand recovery bucket, so that the highland barley and fine sand in the rotary pot 3 are poured forward onto the outer sand screening net 6, and the highland barley will be intercepted by the outer sand screening net 6 in the rotary pot 3, while the fine sand will directly pass through the outer sand screening net 6 and slide forward and downward along the guide plate 26 into the fine sand recovery bucket. At the same time, the rotary pot 3 drives the scraper 32 and the brush 33 to keep rotating, so that the rotating scraper 32 continuously stirs the highland barley accumulated on the outer sand screening net 6, so that the fine sand remaining between the highland barley can completely pass through the outer sand screening net 6. The fine sand in the outer sand screening net 6 is brushed outwards and poured into the fine sand recovery bucket. At the same time, the rotating brush 33 also continuously brushes the fine sand stuck in the outer sand screening net 6 outwards and pours it into the fine sand recovery bucket, thereby automatically separating the highland barley and fine sand in the rotary pot 3. Finally, the staff moves out the fine sand recovery bucket that has recovered all the fine sand, and places the highland barley collection bucket in front of the guide plate 26, and controls the electrically controlled telescopic push rod 46 to push the fixed ring 4 forward until the leakage groove structure 401 of the fixed ring 4 leaks out from the inside of the rotary pot 3. At this time, the highland barley accumulated on the outer sand screening net 6 directly passes through the leakage groove structure 401 of the fixed ring 4 downwards and slides along the guide plate 26 into the highland barley collection bucket, completing the highland barley collection work of the stir-frying work in one step.

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A process for producing sauce wine using highland barley, characterized in that: The following steps are included: Step 1: Wash and dry the highland barley to obtain clean highland barley; Step 2: Put highland barley, granular salt and fine sand into highland barley stir-frying equipment to stir-fry, so that the granular salt is evenly melted on the highland barley; Step 3, on the basis of step 2, continuously detecting the color of the stir-fried highland barley in sequence, until 95% of the continuously detected highland barley colors have a slight burnt phenomenon, indicating that the stir-frying work of the highland barley has reached the standard; Step 4, sieving the stir-fried highland barley and fine sand; Step 5, fermentation and distillation, successively subjecting the separated highland barley to fermentation treatment and distillation treatment to obtain a brewing product; The highland barley stir-frying device comprises: a mounting frame (1); an outer shell (11) connected to the mounting frame (1); a stove (12) installed in the outer shell (11); two electrically controlled rotating machines (21) installed on the mounting frame (1); a fixed cylinder (22) fixedly connected between rotating parts of the two electrically controlled rotating machines (21); a hollow groove structure (220) aligned with the stove (12) is provided at the bottom of the fixed cylinder (22); a rotating pot (3) is rotatably connected in the fixed cylinder (22); a temperature insulation plate (14) is provided on the stove (12); the fixed cylinder ( A driving motor (23) is mounted on the rotating pot (22); a gear (24) is fixedly connected to the output shaft of the driving motor (23); a gear ring (25) is fixedly connected to the rotating pot (3); the gear ring (25) is meshed with the gear (24); a guide plate (26) aligned with the lower side of the opening end of the rotating pot (3) is fixedly connected to the fixed cylinder (22); a plurality of scrapers (31) for turning up the highland barley in sequence are fixedly connected around the inner wall of the rotating pot (3); a fixing ring (4) is fixedly connected to the fixed cylinder (22); and an image detection mechanism for detecting the color of the highland barley inside the rotating pot (3) is connected to the fixing ring (4).

2. The process for producing sauce wine using highland barley according to claim 1, characterized in that: The image detection mechanism comprises a fixing frame (41); the fixing frame (41) is fixedly connected to the fixing ring (4); the collecting bucket (42) is fixedly connected to the fixing frame (41); the collecting bucket (42) is connected to an S-shaped pipe (43); an image recognition sensor (44) is installed in the middle of the S-shaped pipe (43); an inner sand screening net (45) is fixedly connected to the lower side of the inlet end of the S-shaped pipe (43); a plurality of spring pieces (47) are fixedly connected to the inner sand screening net (45); a baffle (48) is fixedly connected to the inner sand screening net (45), the baffle (48) is located on the right side of the spring piece (47), and the height of the baffle (48) is lower than the height of the spring piece (47).

3. The process for producing sauce wine using highland barley according to claim 1, characterized in that: The outer shell (11) is slidably connected to the mounting frame (1); an electric-controlled lift (13) is mounted on the mounting frame (1) for driving the outer shell (11) to move in an up-and-down direction.

4. The process for producing sauce wine using highland barley according to claim 2, characterized in that: A suction cylinder (5) is fixedly connected to the S-shaped pipe (43), and a suction port of the suction cylinder (5) is aligned with the inner sand screening net (45).

5. A process for producing sauce wine using highland barley according to any one of claims 1 to 4, characterized in that: An outer sand screening net (6) for filtering fine sand is detachably fixed on the fixing ring (4).

6. The process for producing sauce wine using highland barley according to claim 5, characterized in that: A leakage groove structure (401) is provided at the bottom of the fixing ring (4).

7. The process for producing sauce wine using highland barley according to claim 6, characterized in that: The fixing ring (4) is slidably connected to the rotating pot (3); an electrically controlled telescopic push rod (46) is installed on the rotating pot (3) for pushing the fixing ring (4) to move in the front-rear direction.

8. The process for producing sauce wine using highland barley according to claim 7, characterized in that: The drain trough structure (401) is initially hidden inside the rotary pot (3).

9. The process for producing sauce wine using highland barley according to claim 7, characterized in that: A scraper (32) is fixedly connected to the edge of the outlet end of the rotary pot (3).

10. The process for producing sauce wine using highland barley according to claim 9, characterized in that: A brush (33) is fixedly connected to the scraper (32) and is in close contact with the outer sand screening net (6).

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