Fish and shrimp feed grading and classifying device

Abstract

The utility model relates to the technical field of screening devices, in particular to a fish and shrimp feed grading and classifying device which comprises an outer cylinder and a screening cylinder installed in the outer cylinder in a reciprocating rotation mode, a feeding hopper is arranged on the outer cylinder in a penetrating mode, the bottom end of the feeding hopper penetrates through a top opening of the screening cylinder to enter the screening cylinder, and a cleaning frame is arranged on the rear wall of the outer cylinder. The cleaning frame is attached to the inner wall of the screen drum to slide, a plurality of sets of unblocking nozzles are distributed on the cleaning frame, an air pump is further arranged on the outer drum, the air pump is started to feed air into the unblocking nozzles on the cleaning frame, the unblocking nozzles can unblock screen holes in the screen drum, and meanwhile the inner wall of the screen drum can be cleaned in a scraping mode. Raw materials are prevented from being attached to the inner wall of the screen drum, a vibration unblocking mode is abandoned, an airflow unblocking mode is adopted, unblocking is achieved, and meanwhile a large amount of collision noise is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of screening devices, in particular to a fish and shrimp feed grading and classification device. Background Art

[0002] In the production of fish and shrimp feed, the bran and soybean meal in the raw materials need to be crushed to the appropriate size. However, the particles in the purchased raw materials are large and small. In order to avoid the qualified particles from being crushed again, the purchased raw material particles need to be screened.

[0003] Publication (Announcement) No.: CN212883393U, a raw material screening device for fish and shrimp feed production, in order to prevent the raw materials from clogging the mesh holes on the screen cylinder or clogging the feed hopper, the knocking vibration is generated between the rotation of the screen cylinder and the feed hopper, and the vibration is used to clear the blockage. If the knocking force is insufficient in the above scheme, it will be difficult to ensure the clearing effect, and if the knocking force is too strong, it will generate a lot of noise. Utility Model Content

[0004] The utility model aims to at least solve the problem that the method of clearing blockage by knocking in the prior art cannot determine the clearing effect and also generates noise.

[0005] This scheme provides a fish and shrimp feed grading and classification device, which is achieved by the following specific technical means: comprising an outer cylinder and a screen cylinder reciprocatingly installed in the outer cylinder, a feed hopper is provided through the outer cylinder, the bottom end of the feed hopper passes through the top opening of the screen cylinder and enters the screen cylinder, a cleaning frame is provided on the rear wall of the outer cylinder, the cleaning frame slides against the inner wall of the screen cylinder and a plurality of groups of clearing nozzles are arranged on the cleaning frame, an air pump is also provided on the outer cylinder, and the air pump is started to send gas into the clearing nozzle on the cleaning frame, and the clearing nozzle can not only clear the sieve holes on the screen cylinder;

[0006] The feed hopper is also provided with an airflow impactor, which generates an impact airflow when the airflow impactor contacts the side of the screen cylinder when the screen cylinder rotates.

[0007] Preferred technical solution 1: The spacing between two adjacent groups of the clearing nozzles is equal to the spacing between the sieve holes distributed laterally on the sieve drum.

[0008] Optimal technical solution 2: A power shaft is rotatably provided inside the outer cylinder, and the power shaft is connected to the screen cylinder to drive the screen cylinder to rotate.

[0009] Preferred technical solution three: The airflow impactor includes a passive airbag fixed on the inner wall of the feed hopper and a pressing ball fixed on the outer wall of the feed hopper. The pressing ball is connected to the passive airbag. When the screen drum rotates and approaches the side, the pressing ball will be squeezed to push the gas in the pressing ball into the passive airbag.

[0010] Preferred technical solution four: Pipeline one and pipeline two are fixed on the rear wall of the outer cylinder, pipeline one is connected to the cleaning nozzle on the cleaning frame, pipeline two is connected to pipeline one, and at the same time, the air outlet of the air pump is connected to pipeline two, and the gas generated by the air pump enters the cleaning nozzle through pipeline two, pipeline one, and the inner cavity of the cleaning frame, the power shaft extends into pipeline two, and a plurality of groups of blades are fixed on the circumference of the part of the power shaft located in pipeline two.

[0011] Preferred technical solution five: A vertical partition is provided in the pipeline 2, and the vertical partition divides the inner cavity of the pipeline 2 into two groups of vertically parallel branch pipes. A notch is opened in the middle of the vertical partition, and the power shaft is located in the notch and drives the blades to rotate in the notch. At the same time, control valves are installed at one end of the two groups of branch pipes close to the air pump, and the two groups of control valves are opened alternately.

[0012] The above structure enables this solution to have the following beneficial effects:

[0013] 1. Abandon the vibration clearing method and adopt the airflow clearing method, which can clear the blockage while avoiding a lot of collision noise;

[0014] 2. The air pump, control valve and blades can provide clearing airflow and kinetic energy for the rotation of the screen drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0017] Figure 2 This is the rear view of this scheme;

[0018] Figure 3 This is the coordination diagram of the screen drum and the airflow impactor of this scheme;

[0019] Figure 4 This is a schematic diagram of the structure of the cleaning rack of this solution;

[0020] Figure 5 This is the coordination diagram of the material reducing hopper and the airflow impactor of this scheme;

[0021] Figure 6 This is a schematic diagram of the internal structure of pipeline 2 in this scheme.

[0022] Among them, 1. outer cylinder, 2. screen cylinder, 3. feed hopper, 4. cleaning rack, 5. clearing nozzle, 6. air pump, 7. air flow impactor, 71. passive air bag, 72. pressing ball, 8. power shaft, 9. swivel, 10. gear one, 11. gear two, 12. pipe one, 13. pipe two, 14. blade, 15. vertical partition, 151. notch, 16. control valve, 17. proximity sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 and Figure 5 The fish and shrimp feed grading and classification device comprises an outer cylinder 1 and a sieve cylinder 2 which is reciprocatingly installed in the outer cylinder 1. A feed hopper 3 is arranged on the outer cylinder 1. The bottom end of the feed hopper 3 passes through the top of the sieve cylinder 2 and enters the sieve cylinder 2. A cleaning frame 4 is arranged on the rear wall of the outer cylinder 1. The cleaning frame 4 is close to the middle height of the outer cylinder 1. The cleaning frame 4 slides against the inner wall of the sieve cylinder 2 and a plurality of groups of clearing nozzles 5 are arranged on the cleaning frame 4. An air pump 6 is also arranged on the outer cylinder 1. When the air pump 6 is started, gas is sent into the clearing nozzle 5 on the cleaning frame 4. The spacing between two adjacent groups of clearing nozzles 5 is the same as that between the sieve cylinder 2 and the cleaning nozzle 5. The spacing between the sieve holes distributed laterally on the cylinder 2 is equal. The setting of the clearing nozzle 5 can not only clear the sieve holes on the sieve cylinder 2, but also scrape and clean the inner wall of the sieve cylinder 2 to prevent the raw materials from adhering to the inner wall of the sieve cylinder 2; an air flow impactor 7 is also provided on the feed hopper 3. When the air flow impactor 7 contacts the side of the sieve cylinder 2 when the sieve cylinder 2 rotates, an impact airflow is generated to impact the raw materials in the feed hopper 3 to avoid blockage; the air flow impactor 7 is provided on both sides of the feed hopper 3, and two groups of air flow impactors 7 are respectively in intermittent contact with the two side edges of the sieve cylinder 2.

[0025] See also Figure 5 , fish and shrimp feed grading and classification device, the airflow impactor 7 includes a passive airbag 71 fixed on the inner wall of the feed hopper 3 and a pressing ball 72 fixed on the outer wall of the feed hopper 3, the pressing ball 72 is connected to the passive airbag 71, and when the screen drum 2 rotates and approaches the side, the pressing ball 72 will be squeezed to push the gas in the pressing ball 72 into the passive airbag 71, so that the passive airbag 71 expands, pushes the raw materials in the feed hopper 3, and clears the blockage by moving the raw materials.

[0026] See also Figure 1-Figure 4, a fish and shrimp feed grading and classification device, a power shaft 8 is rotatably penetrated in the outer cylinder 1, a swivel 9 is rotatably penetrated on the rear wall of the screen cylinder 2, the rear end face of the screen cylinder 2 is fixed to the swivel 9, the feed hopper 3 is fixed to the rear wall of the outer cylinder 1 and the annular main body shell, and at the same time, a gear 10 is sleeved on the power shaft 8, and a gear 2 11 is sleeved on the swivel 9. The gear 10 and the gear 2 11 are meshed. The intermittent reversing rotation of the power shaft 8 drives the gear 10 and the gear 2 11 to mesh, thereby driving the screen cylinder 2 to reciprocate and rotate to achieve the technical effect.

[0027] See also Figure 2 and Figure 6 , a fish and shrimp feed grading and classification device, a pipe 12 and a pipe 2 13 are fixed on the rear wall of the outer cylinder 1, the pipe 1 12 is connected to the cleaning nozzle on the cleaning rack 4, the pipe 2 13 is connected to the pipe 1 12, and the air outlet of the air pump 6 is connected to the pipe 2 13, and the gas generated by the air pump 6 enters the cleaning nozzle through the pipe 2 13, the pipe 1 12, and the inner cavity of the cleaning rack 4, the power shaft 8 extends into the pipe 2 13, and a plurality of groups of blades 14 are fixed on the circumference of the part of the power shaft 8 located in the pipe 2 13. The airflow generated by starting the air pump 6 can drive the blades 14 to rotate, thereby achieving the technical effect of driving the power shaft 8 to rotate; a vertical partition is arranged in the pipe 2 13 15, the vertical partition 15 divides the inner cavity of the pipeline 2 13 into two groups of vertically parallel branch pipes, and a notch 151 is opened in the middle of the vertical partition 15. The power shaft 8 is located in the notch 151 and drives the blades 14 to rotate in the notch 151 and the two sides extend to the two groups of branch pipes respectively. At the same time, the two groups of branch pipes are equipped with control valves 16 at one end close to the air pump 6. The two groups of control valves 16 are opened and closed alternately, that is, when one group of control valves 16 is opened, the other group of control valves 16 is closed, and then the airflow generated by the air pump 6 is controlled to flow from the two groups of branch pipes into the pipeline 1 12 alternately, so as to achieve the technical effect of driving the power shaft 8 to intermittently change the direction, thereby realizing the control of the reciprocating rotation of the screen drum 2.

[0028] See also Figure 3 , a fish and shrimp feed grading and classification device, a proximity sensor 17 is installed on the side wall of the feed hopper 3, and the proximity sensor 17 is connected with the two groups of control valves 16 by signal, that is, the proximity sensor 17 is connected with the control valve 16 through a controller arranged on the outer cylinder 1, and the controller controls the opening and closing of the two groups of control valves 16 after receiving the feedback signal of the proximity sensor 17, and detects the proximity state of the side of the screen drum 2 and the side of the feed hopper 3 through the proximity sensor 17, and then after the air flow impactor 7 is pressed on the side of the screen drum 2, the direction of the power shaft 8 is changed by changing the opening and closing state of the two groups of control valves 16, thereby controlling the screen drum 2 to change the direction.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fish and shrimp feed grading and classification device, comprising an outer cylinder (1) and a screen cylinder (2) reciprocatingly mounted in the outer cylinder (1), wherein a feed hopper (3) is provided through the outer cylinder (1), and the bottom end of the feed hopper (3) passes through the top opening of the screen cylinder (2) and enters the screen cylinder (2), characterized in that: A cleaning frame (4) is arranged on the rear wall of the outer cylinder (1), the cleaning frame (4) slides in contact with the inner wall of the sieve cylinder (2) and a plurality of groups of clearing nozzles (5) are arranged on the cleaning frame (4), an air pump (6) is also arranged on the outer cylinder (1), and the air pump (6) is connected to the clearing nozzles (5); an air flow impactor (7) is also arranged on the feed hopper (3), and the air flow impactor (7) generates an impact air flow when the sieve cylinder (2) rotates and contacts the side of the sieve cylinder (2).

2. A fish and shrimp feed grading and classification device according to claim 1, characterized in that: The spacing between two adjacent groups of the blockage clearing nozzles (5) is equal to the spacing between the sieve holes distributed laterally on the sieve cylinder (2).

3. A fish and shrimp feed grading and classification device according to claim 1, characterized in that: A power shaft (8) is rotatably provided inside the outer cylinder (1), a rotating ring (9) is rotatably provided on the rear wall of the screen cylinder (2), the rear end of the screen cylinder (2) is fixed to the rotating ring (9), and a gear 1 (10) is sleeved on the power shaft (8), and a gear 2 (11) is sleeved on the rotating ring (9), and the gear 1 (10) and the gear 2 (11) are meshed.

4. The fish and shrimp feed grading and classification device according to claim 1, characterized in that: The airflow impactor (7) comprises a passive airbag (71) fixed on the inner wall of the feed hopper (3) and a pressing ball (72) fixed on the outer wall of the feed hopper (3); the pressing ball (72) is connected to the passive airbag (71); when the sieve drum (2) rotates and approaches the side edge, it squeezes the pressing ball (72) and pushes the gas in the pressing ball (72) into the passive airbag (71).

5. The fish and shrimp feed grading and classification device according to claim 4, characterized in that: The airflow impactors (7) are arranged on both sides of the feed hopper (3), and two groups of airflow impactors (7) are respectively in intermittent contact with the two side edges of the screen drum (2).

6. The fish and shrimp feed grading and classification device according to claim 3, characterized in that: A pipe 1 (12) and a pipe 2 (13) are fixed on the rear wall of the outer cylinder (1); the pipe 1 (12) is connected to a cleaning nozzle on the cleaning frame (4); the pipe 2 (13) is connected to the pipe 1 (12); and the gas outlet of the air pump (6) is connected to the pipe 2 (13); the gas generated by the air pump (6) enters the cleaning nozzle through the pipe 2 (13), the pipe 1 (12) and the inner cavity of the cleaning frame (4); the power shaft (8) extends into the pipe 2 (13); and a plurality of groups of blades (14) are fixed to the circumference of a portion of the power shaft (8) located in the pipe 2 (13).

7. A fish and shrimp feed grading and classification device according to claim 6, characterized in that: A vertical partition (15) is arranged in the second pipe (13), and the vertical partition (15) divides the inner cavity of the second pipe (13) into two groups of vertically parallel branch pipes. A notch (151) is provided in the middle of the vertical partition (15). The power shaft (8) is located in the notch (151) and drives the blades (14) to rotate in the notch (151). At the same time, control valves (16) are installed at one end of the two groups of branch pipes close to the air pump (6), and the two groups of control valves (16) are opened alternately.

8. The fish and shrimp feed grading and classification device according to claim 7, characterized in that: A proximity sensor (17) is installed on the side wall of the feed hopper (3), and the proximity sensor (17) is connected to the two groups of control valves (16) by signals.

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