A screening device and screening method for fish feed processing

Abstract

This invention discloses a screening device and method for fish feed processing, belonging to the field of feed processing technology. The screening device and method include a screening box, a screening disc rotatably mounted inside the screening box, a rotating shaft fixedly connected to the center of the screening disc, a one-way bearing fixedly sleeved on the outer side of the rotating shaft, a drive rod fixedly connected to the outer side of the one-way bearing, a power mechanism installed at the lower part of the screening box, a reverse drive mechanism installed at the lower part of the screening box, and a cleaning mechanism installed inside the screening box, positioned above the screening disc. By setting the reverse drive mechanism, during the reciprocating rotation of the drive rod, the screening disc is driven to rotate in a second direction with a smaller rotation arc than the first direction. This allows the screening disc to adjust its position below the cleaning mechanism during the reciprocating rotation and screening of fish feed, enabling the device to clean the screening disc during the screening process, thus increasing the screening efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of feed processing technology, and more specifically, to a screening device and screening method for fish feed processing. Background Technology

[0002] The processing of fish feed involves multiple steps, including raw material preparation, ingredient mixing, extrusion, drying, cooling, screening, and packaging. At each stage, ensuring the quality of the raw materials, precise control of the processing technology, and the nutritional composition and particle quality of the final product are crucial. Screening devices remove substandard particles from the fish feed (such as oversized or undersized particles, impurities, etc.), ensuring that the final product has uniform and appropriately sized particles to meet the different particle size requirements of various fish species.

[0003] A search revealed a patent document with publication number CN117960576B that provides a screening device for animal feed processing. This device, by setting up a rotary screening unit, can use multiple sets of reciprocating screening plates to quickly screen out non-compliant fragments from feed pellets. The spiral curved screening plates increase the screening area, and the addition of a power unit enables the screening plates to rotate, further improving screening efficiency and effect, and meeting the requirements for automated mass production of pelleted feed.

[0004] However, when the screening plate of the above device becomes clogged, it is necessary to simultaneously pause the reciprocating screening motion of the screening plate and the feeding action of the corresponding feed box in order to clean the screening plate, which will affect the screening efficiency of the device. In view of this, we propose a screening device and screening method for fish feed processing. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] The purpose of this invention is to provide a screening device and screening method for fish feed processing, so as to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] This invention is achieved through the following technical solution:

[0009] A screening device and method for fish feed processing includes a screening box, a screening disc rotatably mounted inside the screening box, a rotating shaft fixedly connected to the center of the screening disc, a one-way bearing fixedly sleeved on the outer side of the rotating shaft, a drive rod fixedly connected to the outer side of the one-way bearing, a power mechanism installed at the lower part of the screening box, the power mechanism driving the drive rod to reciprocate, the drive rod driving the rotating shaft to rotate intermittently along a first direction via the one-way bearing, a reverse drive mechanism installed at the lower part of the screening box, the reverse drive mechanism driving the rotating shaft to rotate intermittently along a second direction, the first direction being opposite to the second direction, the angle of intermittent rotation of the rotating shaft along the first direction being greater than the angle of intermittent rotation along the second direction, and a cleaning mechanism installed inside the screening box, the cleaning mechanism being positioned above the screening disc.

[0010] As an optional solution to the technical solution of this application, a baffle is fixedly installed inside the screening box. The baffle is located above the screening disc. A feed inlet is opened at the top of the screening box. The feed inlet and the cleaning mechanism are located on both sides of the baffle. The cleaning mechanism is arranged in front of the feed inlet along a first direction.

[0011] As an optional solution to the technical solution of this application, the power mechanism includes a first drive motor, a limiting rod and a rocker arm. The limiting rod is rotatably connected to the drive rod. A limiting groove is formed in the middle of the limiting rod. The rocker arm is Z-shaped. One end of the rocker arm is slidably inserted into the limiting groove, and the other end is connected and fixed to the output end of the first drive motor.

[0012] As an optional solution to the technical solution of this application, the reverse drive mechanism includes a drive ring, a guide rail, and limit pins. The drive ring is fixedly sleeved on the outside of the rotating shaft. Multiple limit pins are provided, and the multiple limit pins are arranged in a ring with equal spacing. The limit pins are slidably inserted into the drive ring. The guide rail is located below the drive ring and is connected and fixed to the screen box to support the limit pins upward. The guide rail has a notch on one side and is divided into a horizontal part and an inclined part. One end of the horizontal part is connected and fixed to the inclined part, and the other end of the horizontal part is located below the rotation range of the drive rod.

[0013] As an optional solution to the technical solution of this application, the limiting pin has a groove in the middle, and the limiting pin is vertically limited and slidably connected to the drive ring through the groove.

[0014] As an optional solution to the technical solution of this application, the lower part of the limiting pin is provided with a boss, and the horizontal part is provided with a relief groove on the side near the notch. The relief groove is arc-shaped, and the width of the relief groove is smaller than the size of the boss and larger than the size of the limiting pin.

[0015] As an optional solution to the technical solution of this application, the arc between two adjacent limit pins is less than the maximum rotation arc of the drive rod.

[0016] As an optional solution to the technical solution of this application, the cleaning mechanism includes a second drive motor and a cleaning roller. The second drive motor is connected and fixed to the screen box, and the cleaning roller is connected and fixed to the output end of the second drive motor. Bristles are fixed on the outer side of the cleaning roller, and the bristles are arranged in a spiral shape. A first discharge port is provided on one side of the screen box, and the first discharge port is located below the cleaning roller.

[0017] As an optional solution to the technical solution of this application, the screening box has a collection chamber inside, the collection chamber is located below the screening plate, a push plate is fixedly installed on the lower part of the screening plate, and a second discharge port is opened at the lower part of the screening box, the second discharge port is connected to the collection chamber.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1) By setting a reverse drive mechanism, this application can drive the screen disc to rotate in the second direction with a smaller rotation arc than the first direction during the reciprocating rotation of the drive rod. This allows the screen disc to be adjusted to the position of the cleaning mechanism when it is reciprocating to screen the fish feed, so that the device can clean the screen disc during the screening operation, thereby increasing the screening efficiency of the device.

[0021] 2) This application provides spiral bristles on the outside of the cleaning roller, so that the bristles can push the fish feed on the upper part of the screen into the first discharge port during the radial cleaning of the screen.

[0022] 3) This application sets a pusher plate under the screen plate so that the pusher plate can rotate with the screen plate and push the fish feed in the collection chamber into the second discharge port. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a screening device for fish feed processing.

[0024] Figure 2 This is a schematic diagram of the internal structure of a screening device for fish feed processing.

[0025] Figure 3 This is a schematic diagram showing the installation position of the baffle in a screening device for fish feed processing.

[0026] Figure 4 This is a schematic diagram of the screen disc structure of a screening device for fish feed processing.

[0027] Figure 5 This is a schematic diagram of the drive structure of a screening device for fish feed processing.

[0028] Figure 6 This is a schematic diagram of the power mechanism of a screening device for fish feed processing.

[0029] Figure 7 This is a schematic diagram of the reverse drive mechanism of a screening device for fish feed processing.

[0030] In the diagram: 1. Screening box; 101. Baffle; 102. Feed inlet; 103. First discharge port; 104. Collection chamber; 105. Second discharge port; 2. Screening disc; 201. Push plate; 3. Rotating shaft; 4. One-way bearing; 5. Drive rod; 6. Power mechanism; 601. First drive motor; 602. Limiting rod; 603. Rocker arm; 7. Reverse drive mechanism; 701. Drive ring; 702. Guide rail; 7021. Horizontal part; 7022. Inclined part; 7023. Clearance groove; 703. Limiting pin; 7031. Slide groove; 7032. Boss; 8. Cleaning mechanism; 801. Second drive motor; 802. Cleaning roller; 803. Brush bristles. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0032] Example 1:

[0033] Please see Figure 1 and Figure 2 This invention provides a screening device for fish feed processing, including a screening box 1, a screening disc 2 rotatably mounted inside the screening box 1, a rotating shaft 3 fixedly connected to the middle of the screening disc 2, a one-way bearing 4 fixedly sleeved on the outside of the rotating shaft 3, a drive rod 5 fixedly connected to the outside of the one-way bearing 4, a power mechanism 6 installed at the lower part of the screening box 1, the power mechanism 6 is used to drive the drive rod 5 to reciprocate, the drive rod 5 can drive the rotating shaft 3 to rotate intermittently in a first direction through the one-way bearing 4, a reverse drive mechanism 7 installed at the lower part of the screening box 1, the reverse drive mechanism 7 is used to drive the rotating shaft 3 to rotate intermittently in a second direction, the first direction is opposite to the second direction, the angle of the intermittent rotation of the rotating shaft 3 in the first direction is greater than the angle of the intermittent rotation in the second direction, and a cleaning mechanism 8 is installed inside the screening box 1, the cleaning mechanism 8 is located above the screening disc 2.

[0034] The drive rod 5 is driven by the power mechanism 6 to swing back and forth. When the drive rod 5 rotates in the first direction, the one-way bearing 4 locks, thereby driving the rotating shaft 3 to rotate in the first direction. When the drive rod 5 rotates in the second direction, the one-way bearing 4 can no longer transmit power. At this time, the reverse drive mechanism 7 can drive the rotating shaft 3 to rotate in the second direction, realizing the reciprocating rotation of the screen 2 and screening the fish feed on the screen 2. Since the angle of the intermittent rotation of the rotating shaft 3 in the first direction is greater than the angle of the intermittent rotation in the second direction, the position of the screen 2 below the cleaning mechanism 8 can be adjusted during the reciprocating rotation. This allows the screen 2 to be cleaned during screening, preventing fish feed from clogging the screen holes and increasing the screening efficiency of the screen 2.

[0035] like Figure 3 and Figure 4 As shown, a baffle 101 is fixedly installed inside the screening box 1. The baffle 101 is located above the screening disc 2. A feed inlet 102 is opened at the upper part of the screening box 1. The feed inlet 102 and the cleaning mechanism 8 are respectively located on both sides of the baffle 101. The cleaning mechanism 8 is arranged in front of the feed inlet 102 along the first direction. Preferably, the cleaning mechanism 8 includes a second drive motor 801 and a cleaning roller 802. The second drive motor 801 is connected and fixed to the screening box 1. The cleaning roller 802 is connected and fixed to the output end of the second drive motor 801. Brush bristles 803 are fixed on the outer side of the cleaning roller 802. The brush bristles 803 are arranged in a spiral shape. A first discharge port 103 is provided on one side of the screening box 1. The first discharge port 103 is located below the cleaning roller 802.

[0036] Fish feed falling into the screen plate 2 from the feed inlet 102 will be screened during the reciprocating rotation of the screen plate 2. As the screen plate 2 rotates, the fish feed will gradually move towards the baffle 101. Fish feed larger than the inner diameter of the screen holes of the screen plate 2 will gather on the side of the baffle 101. The second drive motor 801 will drive the cleaning roller 802 to rotate. The bristles 803 on the outside of the cleaning roller 802 can clean the fish feed blocked in the screen holes of the screen plate 2. Since the bristles 803 are spirally arranged, during the rotation of the bristles 803, the fish feed above the screen plate 2 can be pushed towards the first discharge port 103 and finally discharged outward through the first discharge port 103.

[0037] In addition, a collection chamber 104 is provided inside the screening box 1, which is located below the screening disc 2. A push plate 201 is fixedly installed on the lower part of the screening disc 2. A second discharge port 105 is provided at the lower part of the screening box 1, and the second discharge port 105 is connected to the collection chamber 104. Fish feed with a diameter smaller than the inner diameter of the screen holes of the screening disc 2 will enter the collection chamber 104 downward through the screening disc 2. During the rotation of the screening disc 2, the push plate 201 can push the fish feed in the collection chamber 104 to move towards the second discharge port 105 and discharge it outward through the second discharge port 105.

[0038] like Figure 5 and Figure 6 As shown, the power mechanism 6 includes a first drive motor 601, a limiting rod 602, and a rocker arm 603. The limiting rod 602 is rotatably connected to the drive rod 5, and a limiting groove is formed in the middle of the limiting rod 602. The rocker arm 603 is Z-shaped, with one end slidably inserted into the limiting groove and the other end connected and fixed to the output end of the first drive motor 601. The first drive motor 601 can drive the rocker arm 603 to rotate in a circular motion. The end of the rocker arm 603 can move up and down in the limiting groove and push the drive rod 5 to rotate reciprocally through the limiting rod 602, providing power for the screen plate 2 to rotate in the second direction.

[0039] like Figure 7 As shown, the reverse drive mechanism 7 includes a drive ring 701, a guide rail 702, and a limiting pin 703. The drive ring 701 is fixedly sleeved on the outside of the rotating shaft 3. Multiple limiting pins 703 are provided, and the multiple limiting pins 703 are arranged in a ring with equal spacing. The limiting pins 703 are slidably inserted into the drive ring 701. The guide rail 702 is located below the drive ring 701 and is connected and fixed to the screen box 1 to support the limiting pins 703 upwards. The guide rail 702 has a notch on one side and is divided into a horizontal part 7021 and an inclined part 7022. One end of the horizontal part 7021 is connected and fixed to the inclined part 7022, and the other end of the horizontal part 7021 is located below the rotation range of the drive rod 5. The limiting pin 703 has a groove 7031 in the middle. The limiting pin 703 is vertically limited and slidably connected to the drive ring 701 through the groove 7031. The arc between two adjacent limiting pins 703 is less than the maximum rotation arc of the drive rod 5.

[0040] When the power mechanism 6 drives the drive rod 5 to rotate in the first direction, the drive rod 5 can drive the rotating shaft 3 to rotate through the one-way bearing 4. When the drive ring 701 rotates with the rotating shaft 3, the limiting pin 703 located above the horizontal part 7021 will move towards the notch side. When the limiting pin 703 moves to the notch, the limiting pin 703 loses the support of the horizontal part 7021 and will move downward relative to the drive ring 701. The upper end of the limiting pin 703 will be lower than the position of the drive rod 5. When the drive rod 5 rotates in the second direction, it will be divided into two drive rotations. In the first driving state, the drive rod 5 can pass over the downward-falling limiting pin 703 from the top, and at this time, the drive rod 5 cannot drive the rotating shaft 3 to rotate. When the arc of the drive rod 5 rotating in the second direction is greater than the arc between two adjacent limiting pins 703, the drive rod 5 will be in the second driving state. In the second driving state, the drive rod 5 will contact the limiting pin 703 above the end of the horizontal part 7021, and push the drive ring 701 and the rotating shaft 3 to rotate in the second direction with an arc smaller than that in the first direction by means of the limiting pin 703. By repeating the above process, the limiting pin 703 can gradually fall into the notch, and move back above the horizontal part 7021 through the inclined part 7022, realizing the screening and rotation function of the screen plate 2.

[0041] Preferably, the lower part of the limiting pin 703 is provided with a boss 7032, and the horizontal part 7021 is provided with a relief groove 7023 on the side near the notch. The relief groove 7023 is arc-shaped, and the width of the relief groove 7023 is smaller than the size of the boss 7032 and larger than the size of the limiting pin 703. The limiting pin 703 can be supported above the relief groove 7023 by means of the boss 7032. When the limiting pin 703 falls into the notch and the drive rod 5 rotates in the second direction, the limiting pin 703 that falls into the notch can slide into the relief groove 7023, so that the rotation arc of the rotating shaft 3 in the second direction is not limited by the arc between two adjacent limiting pins 703.

[0042] Example 2:

[0043] This application provides a screening method applied to a fish feed processing screening device described in Example 1, comprising the following steps:

[0044] S1. The power mechanism 6 drives the drive rod 5 to reciprocate, and the power of the drive rod 5 is transmitted to the rotating shaft 3 through the one-way bearing 4, driving the rotating shaft 3 to rotate intermittently in the first direction.

[0045] S2. Using the reverse drive mechanism 7, during the gap of the intermittent rotation of the rotating shaft 3 in the first direction, drive the rotating shaft 3 to rotate intermittently in the second direction, keeping the angle of the intermittent rotation in the second direction smaller than the angle of the intermittent rotation in the first direction.

[0046] S3. The fish feed is conveyed to the upper part of the screen plate 2, and the fish feed is screened by the reciprocating rotating screen plate 2.

[0047] S4. Use the cleaning mechanism 8 to clean the screen plate 2 to prevent the screen plate 2 from becoming clogged.

[0048] By adopting the above screening method, the sieve plate 2 can be cleaned during the screening process, thereby increasing the screening efficiency of the sieve plate 2.

Claims

1. A screening device for fish feed processing, characterized in that: The screen includes a screening box (1), a screen plate (2) is rotatably installed inside the screening box (1), a rotating shaft (3) is fixedly connected to the middle of the screen plate (2), a one-way bearing (4) is fixedly sleeved on the outside of the rotating shaft (3), a drive rod (5) is fixedly connected to the outside of the one-way bearing (4), a power mechanism (6) is installed at the lower part of the screening box (1), the power mechanism (6) is used to drive the drive rod (5) to swing back and forth, the drive rod (5) can drive the rotating shaft (3) to rotate intermittently in the first direction through the one-way bearing (4), a reverse drive mechanism (7) is installed at the lower part of the screening box (1), the reverse drive mechanism (7) is used to drive the rotating shaft (3) to rotate intermittently in the second direction, the first direction is opposite to the second direction, the angle of the intermittent rotation of the rotating shaft (3) in the first direction is greater than the angle of the intermittent rotation in the second direction, and a cleaning mechanism (8) is installed inside the screening box (1), the cleaning mechanism (8) is set above the screen plate (2); The power mechanism (6) includes a first drive motor (601), a limiting rod (602) and a rocker arm (603). The limiting rod (602) is rotatably connected to the drive rod (5). A limiting groove is provided in the middle of the limiting rod (602). The rocker arm (603) is arranged in a Z-shape. One end of the rocker arm (603) is slidably inserted into the limiting groove, and the other end is connected and fixed to the output end of the first drive motor (601). The reverse drive mechanism (7) includes a drive ring (701), a guide rail (702), and a limiting pin (703). The drive ring (701) is fixedly sleeved on the outside of the rotating shaft (3). There are multiple limiting pins (703), which are arranged in a ring with equal spacing. The limiting pins (703) are slidably inserted into the drive ring (701). The guide rail (702) is located below the drive ring (701) and is connected and fixed to the screen box (1) to support the limiting pins (703) upward. The guide rail (702) has a notch on one side and is divided into a horizontal part (7021) and an inclined part (7022). One end of the horizontal part (7021) is connected and fixed to the inclined part (7022), and the other end of the horizontal part (7021) is located below the rotation range of the drive rod (5).

2. The screening device for fish feed processing according to claim 1, characterized in that: A baffle (101) is fixedly installed inside the screening box (1). The baffle (101) is located above the screening plate (2). A feed inlet (102) is opened on the upper part of the screening box (1). The feed inlet (102) and the cleaning mechanism (8) are located on both sides of the baffle (101). The cleaning mechanism (8) is arranged in front of the feed inlet (102) along the first direction.

3. The screening device for fish feed processing according to claim 1, characterized in that: The limiting pin (703) has a groove (7031) in the middle, and the limiting pin (703) is vertically limited and slidably connected to the drive ring (701) through the groove (7031).

4. The screening device for fish feed processing according to claim 1, characterized in that: The lower part of the limiting pin (703) is provided with a boss (7032), and the horizontal part (7021) is provided with a relief groove (7023) on the side near the notch. The relief groove (7023) is arc-shaped. The width of the relief groove (7023) is smaller than the size of the boss (7032) and larger than the size of the limiting pin (703).

5. A screening device for fish feed processing according to claim 1, characterized in that: The arc between two adjacent limiting pins (703) is less than the maximum rotation arc of the drive rod (5).

6. A screening device for fish feed processing according to claim 1, characterized in that: The cleaning mechanism (8) includes a second drive motor (801) and a cleaning roller (802). The second drive motor (801) is connected and fixed to the screening box (1). The cleaning roller (802) is connected and fixed to the output end of the second drive motor (801). Brush bristles (803) are fixed on the outside of the cleaning roller (802). The brush bristles (803) are arranged in a spiral shape. A first discharge port (103) is provided on one side of the screening box (1). The first discharge port (103) is located below the cleaning roller (802).

7. A screening device for fish feed processing according to claim 1, characterized in that: The screening box (1) has a collection chamber (104) inside. The collection chamber (104) is located below the screen plate (2). A push plate (201) is fixedly installed on the lower part of the screen plate (2). The screening box (1) has a second discharge port (105) at the lower part. The second discharge port (105) is connected to the collection chamber (104).

8. A screening method, applied to a screening device for fish feed processing as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. The power mechanism (6) drives the drive rod (5) to rotate back and forth, and the power of the drive rod (5) is transmitted to the rotating shaft (3) through the one-way bearing (4), driving the rotating shaft (3) to rotate intermittently in the first direction; S2. Using the reverse drive mechanism (7) during the gap of the intermittent rotation of the rotating shaft (3) in the first direction, drive the rotating shaft (3) to rotate intermittently in the second direction, keeping the angle of the intermittent rotation in the second direction smaller than the angle of the intermittent rotation in the first direction; S3. The fish feed is conveyed to the upper part of the sieve plate (2) and the fish feed is sieved by the reciprocating sieve plate (2); S4. Use the cleaning mechanism (8) to clean the screen plate (2) to prevent the screen plate (2) from becoming clogged.

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