CN217446145U - Fish and vegetable symbiotic three-dimensional soilless culture device - Google Patents

Abstract

The utility model discloses a fish and vegetable symbiotic three-dimensional soilless culture device, which relates to the technical field of soilless culture and comprises a water production box, a support plate, a culture plate, a water suction pump, a water suction pipe, a sieve net and a conveying mechanism; the conveying mechanism comprises a motor, a spiral conveying rod and a fixing plate; the outer wall of one side of the water production tank far away from the motor is provided with a cleaning mechanism fixedly connected with the water pumping pipe, and is used for intensively cleaning fish excrement. The utility model discloses a set up conveying mechanism, drive the auger delivery pole through starter motor and rotate, the fixed plate rotates the support to the auger delivery pole through the pivot this moment, mutually supports through the inner wall bottom that is the taper with the aquatic products case simultaneously for the inside excrement that deposits of aquatic products case bottom is discharged to the inside of clearance mechanism under the rotatory drive of auger delivery pole, thereby realizes concentrating the function of collecting the excrement of pond bottom.

Description

A fish and vegetable symbiosis three-dimensional soilless cultivation device

technical field

The utility model relates to the technical field of soilless cultivation, in particular to an aquaponics three-dimensional soilless cultivation device.

Background technique

Aquaponics is a new type of compound farming system, which combines aquaculture and hydroponics, two completely different farming techniques, through ingenious ecological design, to achieve scientific synergy, so as to achieve fish farming without changing water. There is no water quality problem, and the ecological symbiotic effect of growing vegetables without fertilization is normal. In traditional aquaculture, with the accumulation of fish excrement, the ammonia nitrogen in the water body increases, and the toxicity gradually increases. In the aquaponics system, aquatic products The cultured water is transported to the hydroponic cultivation system, and the ammonia nitrogen in the water is decomposed into nitrite by bacteria and then decomposed into nitrate by nitrifying bacteria. Nitrate can be directly absorbed and utilized by plants as nutrients. A harmonious ecological balance between the three microorganisms is a sustainable, circular, zero-emission, low-carbon production model, and an effective way to effectively solve the agricultural ecological crisis.

However, fish excrement is easily deposited at the bottom of the pool, which is inconvenient to be pumped. Long-term accumulation can easily lead to poor water quality inside the pool. Therefore, a soilless soil-free system that can collect and recycle the excrement deposited at the bottom of the pool is provided. Cultivation device.

Utility model content

The purpose of the present utility model is to provide an aquaponics three-dimensional soilless cultivation device to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the utility model provides the following technical solutions:

An aquaponics three-dimensional soilless cultivation device, comprising an aquatic product box, support plates are fixedly connected to the top ends of the two sides of the aquatic product box, and a plurality of longitudinally distributed cultivation plates are arranged on one side of the two support plates that are close to each other. A suction pump is installed on the upper end of the side of the support plate away from the cultivation plate, the input end of the suction pump is provided with a suction pipe, the interior of the sieve is provided with a sieve, and the aquatic product box is far from one end of the suction pipe. The side is provided with a conveying mechanism;

The conveying mechanism includes a motor, a screw conveying rod and a fixing plate, the motor is installed on the side of the aquatic product tank away from the water suction pipe, the motor and the aquatic product tank are fixedly connected by bolts, and the screw conveying rod is fixed at the output end of the motor , and penetrates into the interior of the aquatic product tank and is located below the screen mesh, the screw conveying rod is fixedly connected to the motor through a coupling, and the fixing plate is arranged on the side of the screw conveying rod away from the motor, and is connected with the aquatic product tank. Fixed connection, the screw conveying rod and the aquatic product tank are fixedly connected by welding;

A cleaning mechanism fixedly connected to the water suction pipe is arranged on the outer wall of the aquatic product box on one side away from the motor, and is used for centralized cleaning of fish excrement.

As a further solution of the present utility model: the cleaning mechanism includes a limit card plate, a sealing flap, a collecting cylinder, a fixed ring, a linkage slide plate, a limit rod, a spring, a first sealing baffle, and a second sealing baffle , a limit swivel and a fixed screen cylinder, the fixed ring is fixed on the side of the aquatic product tank away from the motor, the fixed ring and the aquatic product tank are fixedly connected by welding, and the first sealing baffle is fixed on the top of the inner wall of the fixed ring , the first sealing baffle and the fixing ring are fixedly connected by welding, the collecting cylinder is arranged on the side of the fixing ring away from the aquatic product tank, the fixing screen cylinder is arranged on the side of the collecting cylinder away from the fixing ring, and It is fixedly connected with the suction pipe. The fixed screen cylinder and the suction pipe are integrally formed by injection molding. There are two limit swivel rings. It is sleeved with the fixed ring and the fixed screen cylinder. The second sealing baffle is arranged on the side of the first sealing baffle away from the aquatic product tank, and is fixedly connected with the collecting cylinder. The second sealing baffle is connected to the collecting material. The barrel is integrally formed by injection molding, the sealing flap is arranged on the top of the collecting barrel, the limit card is arranged on the upper surface of the sealing flap, and penetrates into the interior of the sealing flap, and the linkage slide plate is fixed on the limiter. The position card board is close to the side of the aquatic product box and penetrates into the interior of the aquatic product box. The linkage slide plate and the limit card plate are integrally formed by injection molding, and the limit rod is arranged at the top of the side of the linkage slide plate away from the limit card plate. , and penetrates to the bottom end of the linkage slide plate and is fixedly connected with the aquatic product tank, the limit rod and the aquatic product tank are fixedly connected by welding, the spring is arranged on the upper surface of the linkage slide plate, and is sleeved with the limit rod.

As a further solution of the present invention: the inside of the support plate is provided with a plurality of water pipes that are fixedly connected to the cultivation plate, the output end of the pump is provided with a water pipe that is fixedly connected to the water pipes, and the support plate The bottom end is provided with a water inlet pipe which extends to the interior of the aquatic product tank and is fixedly connected with the water delivery pipe.

As a further scheme of the present invention: the top of the cultivation plate is provided with a plurality of cultivation grooves for vegetable cultivation, the output end of the motor is connected with the aquatic product tank through bearings, and the bottom end of the inner wall of the aquatic product box is in the shape of a bearing. Cone-shaped, the screw conveying rod and the fixed plate are rotatably connected through a rotating shaft.

As a further solution of the present utility model: the sealing flap and the collecting cylinder are connected in rotation through hinges, and the position where the collecting cylinder, the sealing flap and the limit card are connected is provided with a limit that matches with their outer walls. card slot.

As a further solution of the present invention, a lifting chute matching the moving trajectory of the aquatic product tank and the linkage slide plate is provided at the connecting position, and the fixed screen cylinder, the fixing ring and the limit swivel are connected at the connecting position. There is a limit turn slot that matches its movement track.

As a further solution of the present invention, the first sealing baffle and the outer wall of the first sealing baffle are both semicircular, and the inner wall of the fixed screen cylinder is provided with a filter screen.

Compared with the prior art, the beneficial effects of the present utility model are:

1. By setting the cleaning mechanism, the sealing flap is driven to squeeze the limit card plate by rotating the collecting cylinder, and the limit card plate drives the linkage slide plate to rise. At this time, the linkage slide plate rises along the outer wall of the limit rod, and the spring Squeeze, and then the collecting cylinder drives the sealing flap to rotate to the bottom. At this time, the spring pushes the linkage slide plate through the rebound to drive the limit card plate to lower to the limit of the collecting cylinder, and at the same time the collecting cylinder drives the second sealing baffle to rotate. At this time, the second sealing baffle can block the opening of the fixing ring by cooperating with the first sealing baffle, and then open the sealing flap, so as to realize the convenient cleaning of the excrement inside the collecting cylinder;

2. By setting the conveying mechanism, the screw conveying rod is driven to rotate by starting the motor. At this time, the fixed plate rotates and supports the screw conveying rod through the rotating shaft. The precipitated excrement is discharged into the interior of the cleaning mechanism driven by the rotation of the screw conveying rod, so as to realize the function of centralized collection of the excrement at the bottom of the pool.

Description of drawings

Fig. 1 is a kind of structural representation of aquaponics three-dimensional soilless cultivation device;

Fig. 2 is a kind of aquaponics symbiosis three-dimensional soilless cultivation device of aquaculture tank cross-sectional schematic diagram;

3 is a schematic sectional view of a cleaning mechanism of a three-dimensional soilless cultivation device for aquaponics;

FIG. 4 is a schematic diagram of the internal structure of an aquatic product box of an aquaponics three-dimensional soilless cultivation device.

In the figure: 1. Aquatic product box; 2. Cleaning mechanism; 201, Limiting card; 202, Sealing flap; 203, Collecting cylinder; 204, Fixing ring; 205, Linked slide plate; Spring; 208, first sealing baffle; 209, second sealing baffle; 2010, limit swivel; 2011, fixed screen cylinder; 3, conveying mechanism; 301, motor; 302, screw conveying rod; 303, fixing plate ; 4. Support plate; 5. Cultivation plate; 6. Pumping pump; 7. Pumping pipe; 8. Screening.

Detailed ways

Referring to FIGS. 1 to 4 , in an embodiment of the present invention, a three-dimensional soilless cultivation device for aquaponics includes an aquatic product box 1 , and support plates 4 are fixedly connected to the tops of both sides of the aquatic product box 1 , and the two support plates 4 are close to each other. One side is provided with a plurality of longitudinally distributed cultivation plates 5, a support plate 4 is provided with a suction pump 6 on the upper end of one side away from the cultivation plate 5, and the input end of the suction pump 6 is provided with a suction pipe 7, which passes through the interior of the screen 8. A screen 8 is provided, and a conveying mechanism 3 is provided on the side of the aquatic product tank 1 away from the water pumping pipe 7;

The conveying mechanism 3 includes a motor 301, a screw conveying rod 302 and a fixing plate 303. The motor 301 is installed on the side of the aquatic product tank 1 away from the suction pipe 7. The motor 301 and the aquatic product tank 1 are fixedly connected by bolts, and the screw conveying rod 302 is fixed on the motor 301. The output end of the water tank 1 runs through the inside of the aquatic product tank 1 and is located below the screen 8. The screw conveying rod 302 is fixedly connected with the motor 301 through a coupling, and the fixing plate 303 is arranged on the screw conveying rod 302. side, and is fixedly connected with the aquatic product tank 1, and the screw conveying rod 302 is fixedly connected with the aquatic product tank 1 by welding;

A cleaning mechanism 2 fixedly connected to the water pumping pipe 7 is provided on the outer wall of the aquatic product tank 1 away from the motor 301 , and is used for centralized cleaning of fish excrement.

This kind of aquaponics three-dimensional soilless cultivation device, when in use, starts the pumping pump 6 so that the pumping pipe 7 pumps water through the cleaning mechanism 2 to the internal water source of the aquatic product tank 1, and at the same time, the pumping pump 6 cooperates with the water supply pipe and the water supply pipe can pass The support plate 4 and the cultivation plate 5 transport the water source to the inside of the cultivation tank, so as to facilitate soilless cultivation of vegetables, and then the support plate 4 re-discharges the water source purified by the vegetables to the interior of the aquatic product tank 1 through the water inlet pipe, so as to facilitate the cultivation of vegetables. When the fish is cultured and the fish inside the aquaculture tank 1 is excreted during the long-term breeding process, the excrement and the fish can be effectively isolated through the sieve 8 at this time, and the aquaculture tank 1 passes through a cone. The bottom end of the inner wall is formed in the shape of the inner wall, so that the excrement is automatically deposited and concentrated. When the excrement is cleaned, the starter motor 301 drives the screw conveying rod 302 to rotate. At this time, the fixed plate 303 rotates and supports the screw conveying rod 302 through the rotating shaft. At the same time, the aquatic product tank 1. The excrement deposited on the inner wall of the bottom end is driven by the rotation of the screw conveying rod 302, and is discharged into the interior of the cleaning mechanism 2, and then the excrement can be conveniently disposed of by the cleaning mechanism 2.

In Figures 1 to 3, the cleaning mechanism 2 includes a limit card plate 201, a sealing flap 202, a collecting cylinder 203, a fixing ring 204, a linkage slide plate 205, a limit rod 206, a spring 207, a first sealing baffle 208, The second sealing baffle 209, the limit swivel 2010 and the fixed screen cylinder 2011, the fixing ring 204 is fixed on the side of the aquatic product tank 1 away from the motor 301, the fixing ring 204 and the aquatic product tank 1 are fixedly connected by welding, the first sealing baffle 208 is fixed on the top of the inner wall of the fixing ring 204, the first sealing baffle 208 is fixedly connected with the fixing ring 204 by welding, the collecting cylinder 203 is arranged on the side of the fixing ring 204 away from the aquatic product tank 1, and the fixing screen cylinder 2011 is arranged on the collecting The cylinder 203 is away from the side of the fixing ring 204, and is fixedly connected with the suction pipe 7. The fixed screen cylinder 2011 and the suction pipe 7 are integrally formed by injection molding. There are two limit swivels 2010. They are respectively fixed on both sides of the collecting cylinder 203, and are respectively sleeved with the fixed ring 204 and the fixed screen cylinder 2011. The second sealing baffle 209 is arranged on the side of the first sealing baffle 208 away from the aquatic product tank 1, and is connected with the first sealing baffle 208. The collecting cylinder 203 is fixedly connected, the second sealing baffle 209 and the collecting cylinder 203 are integrally formed by injection molding, the sealing flap 202 is arranged on the top of the collecting cylinder 203 , and the limit card 201 is arranged on the upper surface of the sealing flap 202 , and penetrate to the inside of the sealing flap 202, the linkage slide plate 205 is fixed on the side of the limit card 201 close to the aquatic product tank 1, and penetrates into the interior of the aquatic product tank 1, the linkage slide plate 205 and the limit card plate 201 are integrated by injection molding Forming, the limit rod 206 is arranged on the top of the side of the linkage slide plate 205 away from the limit card board 201, and penetrates to the bottom end of the linkage slide plate 205 to be fixedly connected with the aquatic product tank 1, and the limit rod 206 is fixedly connected with the aquatic product tank 1 by welding. , the spring 207 is arranged on the upper surface of the linkage sliding plate 205, and is sleeved with the limit rod 206.

This kind of aquaponics three-dimensional soilless cultivation device drives the sealing flap 202 to squeeze the limit card plate 201 by rotating the collecting cylinder 203, and at the same time the limit card plate 201 drives the linkage slide plate 205 to rise. The outer wall of the position rod 206 rises and squeezes the spring 207, and then the collecting cylinder 203 drives the sealing flap 202 to rotate to the bottom. At this time, the spring 207 pushes the linkage slide plate 205 through the rebound to drive the limit card 201 to descend and clip into the aggregate The cylinder 203 limits the inside of the slot, so that the collecting cylinder 203 can be conveniently limited. At the same time, the collecting cylinder 203 drives the two limiting swivels 2010 to rotate inside the fixed ring 204 and the fixed screen cylinder 2011 respectively. The barrel 203 drives the second sealing baffle 209 to rotate, and at the same time, the second sealing baffle 209 cooperates with the first sealing baffle 208 to block the opening of the fixing ring 204, so as to avoid the cleaning of the excrement. In the event of water leakage, the sealing flap 202 is opened by turning over the hinge, so that the excrement inside the collecting cylinder 203 can be conveniently cleaned.

In Figures 2 to 4: the interior of the support plate 4 is provided with a plurality of water pipes that are fixedly connected to the cultivation plate 5, the output end of the suction pump 6 is provided with water pipes that are fixedly connected to the water pipes, and the bottom end of the support plate 4 is provided with There is a water inlet pipe extending to the interior of the aquatic product tank 1 and fixedly connected with the water delivery pipe.

This kind of aquaponics three-dimensional soilless cultivation device can make the water source inside the aquatic product tank 1 be pumped by the water pump 6 to the cultivation plate 5 through the mutual cooperation of the water delivery pipe, the water delivery pipe, the water inlet pipe and the water pumping pipe 7 . Soilless cultivation of vegetables is carried out in the interior, and then the purified water source of the vegetables is transported to the interior of the aquatic tank 1, so as to achieve the effect of aquaponics.

In Figures 2 to 4: the top of the cultivation plate 5 is provided with a plurality of cultivation grooves for vegetable cultivation, the output end of the motor 301 is rotatably connected with the aquatic product tank 1 through a bearing, and the bottom end of the inner wall of the aquatic product tank 1 is tapered and spirally The conveying rod 302 is rotatably connected with the fixing plate 303 through a rotating shaft.

This kind of aquaponics three-dimensional soilless cultivation device, through the bottom end of the conical inner wall of the aquatic tank 1, can make the excrement automatically settle and concentrate in the interior of the aquatic tank 1, so that the excrement can be conveniently and concentratedly discharged through the screw conveying rod 302.

In Figures 2 to 3: the sealing flap 202 and the collecting cylinder 203 are connected by hinge rotation, and the position where the collecting cylinder 203, the sealing flap 202 and the limit card 201 are connected is provided with a limit card matching the outer wall of the collecting cylinder 203. groove.

This kind of aquaponics three-dimensional soilless cultivation device can make the collecting cylinder 203 drive the sealing flap 202 during the overturning process through the limit card slot, and the limit card plate 201 is used for rotation limit fixation.

In Figs. 2 to 3: a lift chute matching the moving track of the aquatic product tank 1 is provided at the contact position of the linkage slide plate 205, and the fixed screen cylinder 2011, the fixed ring 204 and the limit swivel 2010 are provided at the contact position. The limit groove that matches its movement trajectory.

This kind of aquaponics three-dimensional soilless cultivation device makes the two limit swivels 2010 rotate inside the fixed screen cylinder 2011 and the fixed ring 204 respectively through the limit swivel, so that the collecting cylinder 203 can pass through the two limit swivels. Ring 2010 performs limit rotation.

In FIGS. 2-3 , the first sealing baffle 208 and the outer wall of the first sealing baffle 208 are both semicircular, and the inner wall of the fixed screen cylinder 2011 is provided with a filter screen.

In this aquaponic three-dimensional soilless cultivation device, the fixed screen cylinder 2011 can effectively filter and isolate the excrement entering the collecting cylinder 203 through the filter screen, so as to prevent the excrement from moving with the water flow.

The working principle of the utility model is as follows: when in use, start the water pump 6 to make the water pump 7 pump water through the cleaning mechanism 2 to the internal water source of the aquatic product tank 1, and at the same time, the water pump 6 cooperates with the water pipe and the water pipe, and can pass through the support plate. 4. The cultivation plate 5 transports the water source to the inside of the cultivation tank, so as to facilitate soilless cultivation of vegetables, and then the support plate 4 re-discharges the water source purified by the vegetables to the interior of the aquatic product tank 1 through the water inlet pipe, so as to facilitate the cultivation of fish. At the same time, when the fish inside the aquaculture tank 1 is excreted during the long-term cultivation process, the excrement and fish can be effectively isolated through the screen 8 at this time, and the aquaculture tank 1 passes through the cone-shaped At the bottom end of the inner wall, the excrement is automatically deposited and concentrated. When the excrement is cleaned, the motor 301 is started to drive the screw conveying rod 302 to rotate. At this time, the fixed plate 303 rotates and supports the screw conveying rod 302 through the rotating shaft. At the same time, the bottom of the aquatic product tank 1 The excrement deposited on the inner wall of the end is driven by the rotation of the screw conveying rod 302, and is discharged into the interior of the collecting cylinder 203 through the fixing ring 204, and then the excrement in the water flow can be filtered through the filter screen inside the limit card 201. separation, when a large amount of excrement accumulates in the collecting cylinder 203, the rotating collecting cylinder 203 drives the sealing flap 202 to squeeze the limit card plate 201, and the limit card plate 201 drives the linkage slide plate 205 to rise at the same time. When the linkage slide plate 205 rises along the outer wall of the limit rod 206, and squeezes the spring 207, then the sealing flap 202 is driven by the collecting cylinder 203 and moves to the bottom of the collecting cylinder 203, and at the same time the collecting cylinder 203 The two limit swivels 2010 are driven to rotate inside the fixed ring 204 and the fixed screen cylinder 2011 respectively. At this time, the collecting cylinder 203 drives the second sealing baffle 209 to rotate. At the same time, the second sealing baffle 209 passes through the The mutual cooperation of the baffles 208 can block the opening of the fixing ring 204, so as to avoid the phenomenon of water flow leakage when the excrement is cleaned. At this time, the spring 207 pushes the linkage slide plate 205 by rebounding, and drives the limit card plate 201 to lower the card. into the limit slot of the collecting cylinder 203, so as to conveniently limit the collecting cylinder 203, and then turn over the sealing flap 202 through the hinge, so that the excrement inside the collecting cylinder 203 can be conveniently cleaned.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. The technical solution of the utility model and its utility model concept are equivalently replaced or changed, and should be covered within the protection scope of the present utility model.

Claims (7)

1. An aquaponics three-dimensional soilless cultivation device, comprising an aquatic product box (1), the top of both sides of the aquatic product box (1) is fixedly connected with a support plate (4), and two described support plates (4) are close to each other A plurality of longitudinally distributed cultivation plates (5) are arranged on one side of the supporting plate (4), a suction pump (6) is installed on the upper end of one side of the support plate (4), and the input end of the suction pump (6) is provided with a suction pipe (7), the inside of the aquatic product box (1) is provided with a screen (8), characterized in that a conveying mechanism (3) is provided on one side of the aquatic product box (1); The conveying mechanism (3) includes a motor (301), a screw conveying rod (302) and a fixing plate (303), the motor (301) is installed on one side of the aquatic product tank (1), and the screw conveying rod (302) ) is fixed at the output end of the motor (301), and the fixing plate (303) is arranged on one side of the screw conveying rod (302); A cleaning mechanism (2) is provided on one side outer wall of the aquatic product box (1) for centralized cleaning of fish excrement. 2. A kind of aquaponics three-dimensional soilless cultivation device according to claim 1, is characterized in that, described cleaning mechanism (2) comprises limit card plate (201), sealing flap (202), collecting cylinder (201) 203), fixing ring (204), linkage slide plate (205), limit rod (206), spring (207), first sealing baffle (208), second sealing baffle (209), limit swivel ( 2010) and a fixed screen cylinder (2011), the fixed ring (204) is fixed on one side of the aquatic product tank (1), and the first sealing baffle (208) is fixed on the top of the inner wall of the fixed ring (204), so The collecting cylinder (203) is arranged on one side of the fixing ring (204), the fixing screen cylinder (2011) is arranged on one side of the collecting cylinder (203), and the limiting swivel (2010) is provided with two , the two limiting rings (2010) are respectively fixed on both sides of the collecting cylinder (203), the second sealing baffle (209) is arranged on one side of the first sealing baffle (208), the The sealing flap (202) is arranged on the top of the collecting cylinder (203), the limit card plate (201) is arranged on the upper surface of the sealing flap (202), and the linkage slide plate (205) is fixed on the limit card On one side of the plate (201), the limiting rod (206) is arranged on the top end of the linkage sliding plate (205), and the spring (207) is arranged on the upper surface of the linkage sliding plate (205). 3. a kind of aquaponics three-dimensional soilless cultivation device according to claim 1, is characterized in that, the interior of described support plate (4) is provided with a plurality of water pipes fixedly connected with the cultivation plate (5), the The output end of the suction pump (6) is provided with a water delivery pipe fixedly connected with the water delivery pipe, and the bottom end of the support plate (4) is provided with a water inlet pipe which extends to the interior of the aquatic product tank (1) and is fixedly connected with the water delivery pipe. 4. A kind of aquaponics three-dimensional soilless cultivation device according to claim 1, characterized in that, the top of the cultivation plate (5) is provided with a plurality of cultivation grooves for vegetable cultivation, and the motor (301) The output end of the fish tank (1) is rotatably connected with the aquatic product tank (1) through a bearing, the bottom end of the inner wall of the aquatic product tank (1) is tapered, and the screw conveying rod (302) and the fixed plate (303) are rotatably connected through a rotating shaft. 5. A kind of aquaponics three-dimensional soilless cultivation device according to claim 2, is characterized in that, described sealing flap (202) and collecting cylinder (203) are connected through hinge rotation, and described collecting cylinder (203) ), a limit card slot is provided at the position where the sealing flap (202) and the limit card plate (201) are connected. 6. a kind of aquaponics three-dimensional soilless cultivation device according to claim 2, is characterized in that, described aquatic product box (1) and linkage slide plate (205) are provided with lifting chute at the connecting position, described fixed sieve A limit rotation groove is provided at the position where the cylinder (2011), the fixed ring (204) and the limit rotation ring (2010) meet. 7. The three-dimensional soilless cultivation device for aquaponics according to claim 2, wherein the outer walls of the first sealing baffle (208) and the first sealing baffle (208) are all semicircular, so The inner wall of the fixed screen cylinder (2011) is provided with a filter screen.

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