Multi-stage screening device for pellet feed

Abstract

The utility model relates to a multi-stage screening device for pellet feed. Comprising a rack, an angle steel rail is mounted on the rack, the mounting base is in rolling contact with the angle steel rail, the reciprocating driving assembly and the bottom-layer collecting box are mounted on the rack, and a vibration motor is mounted at the bottom of the bottom-layer collecting box; a bottom-layer collecting box, a first screening box, a second screening box and a third screening box are mounted on the mounting base in a stacked mode, a first screen is mounted at the butt-joint communicating position of the bottom-layer collecting box and the first screening box, and a second screen is mounted at the butt-joint communicating position of the first screening box and the second screening box. A third screen is installed at the butt joint and communication position of the second screening box and the third screening box. The screen holes formed in the first screen, the second screen and the third screen are increased in sequence; a cleaning assembly is mounted in each screening box; the device further comprises an on-off valve assembly. The cleaning assembly comprises a rotating roller, a cleaning brush and a roller brush seat are mounted on the rotating roller, and a cleaning roller brush is rotationally connected to the roller brush seat; the device further comprises a cleaning driving mechanism. The feed multi-stage screening device can synchronously conduct multi-stage screening operation on feed, is high in working efficiency, can clean the screen and prevents the screen from being blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening equipment, and in particular relates to a multi-stage screening device for pellet feed. Background Art

[0002] Feed is a general term for food for raised animals. In a narrower sense, feed mainly refers to food for animals raised in agriculture or animal husbandry. Feed includes more than ten varieties of feed raw materials such as soybeans, soybean meal, corn, fish meal, amino acids, miscellaneous meal, whey powder, oils, meat and bone meal, grains, and feed additives.

[0003] At present, more and more livestock are being raised. With the progress of society, the artificial breeding industry has developed greatly, and the demand for breeding is increasing. The process of feed production includes raw material cleaning, crushing or grinding, mixing, granulation, drying and packaging. After the feed is made, in order to ensure that the livestock can eat it later, the feed needs to be screened.

[0004] When using existing screening devices to screen feed, it is usually only a single-stage screening, and it is impossible to screen out feed of different particle sizes at one time, thereby reducing the efficiency of the device; in addition, most of the current screening devices are easily blocked during screening due to the different sizes and large number of feed particles, which affects the smooth progress of the screening operation. Therefore, it is urgent to design a multi-stage screening device for pellet feed to solve the above problems. Utility Model Content

[0005] The utility model provides a multi-stage screening device for pellet feed with a reasonable structural design to solve the technical problems existing in the known technology. The utility model can simultaneously perform multi-stage screening operations on feed, with high working efficiency, and can clean the screen, avoiding the blockage of the screen affecting normal work, and further improving the working efficiency of the screening device.

[0006] The utility model adopts the technical scheme to solve the technical problems existing in the known technology: a multi-stage screening device for pellet feed comprises a frame, on which are installed two groups of angle steel rails which are arranged in parallel and are arranged in an inclined manner with an upper height higher than a lower height, a mounting base which is in rolling contact with the angle steel rails through a plurality of walking wheels, and a reciprocating drive assembly which is installed on the frame and is used to drive the mounting base to reciprocate along the extension direction of the angle steel rails; the utility model also comprises a bottom collecting box which is installed on the mounting base, and a vibration motor is installed at the bottom of the bottom collecting box; a bottom collecting box, a first screening box, a second screening box and a third screening box which are interconnected are stacked and installed from bottom to top on the mounting base, a first screen is installed at the butt connection position of the bottom collecting box and the first screening box, and a first screen is installed at the first screening box. A second screen is installed at the docking and connecting position between the first screening box and the second screening box, and a third screen is installed at the docking and connecting position between the second screening box and the third screening box; the sieve holes opened on the first screening box, the second screening box and the third screening box are increased in sequence; it also includes a top cover installed on the top of the third screening box, and a feed port connected to the inner cavity of the third screening box is installed on the top cover; a cleaning assembly is installed in each screening box for cleaning the screen; it also includes an opening and closing valve assembly for synchronously controlling the opening and closing states of the discharge ports of the bottom collecting box and each screening box; the cleaning assembly includes a rotating roller, a cleaning brush and a roller brush seat are installed on the outer peripheral wall of the rotating roller, and a cleaning roller brush is rotatably connected to the roller brush seat; it also includes a cleaning drive mechanism for driving the rotating roller to reciprocate and rotate synchronously.

[0007] The advantages and positive effects of the utility model are as follows: the utility model provides a multi-stage screening device for pellet feed, which can perform a one-time screening operation on the material poured into the screening device by setting a stacked bottom collection box and each screening box, and cooperate with each screen, so as to screen out the required feed of different particle sizes; by setting a vibration motor and a reciprocating drive assembly, and cooperating with an opening and closing valve assembly, the bottom collection box and each screening box can be driven to vibrate and reciprocate synchronously, thereby accelerating the screening speed of the screening device and thus improving the work efficiency; by setting a cleaning assembly in each screening box, each screen can be cleaned to avoid clogging of the screen and affecting the normal work of the screening device. The utility model can perform multi-stage screening operations on the feed synchronously, with high work efficiency, and can clean the screen to avoid clogging of the screen and affecting the normal work, further improving the work efficiency of the screening device.

[0008] Preferably: the cleaning drive mechanism includes two groups of cleaning racks arranged in parallel, and the inclination direction of the cleaning racks is consistent with the inclination direction of the screen; the two groups of cleaning racks are installed on the side walls of the corresponding screening box, and cleaning gears are keyed at both ends of the rotating roller, and each cleaning gear is meshed with the corresponding cleaning rack; it also includes a linear drive component installed on the corresponding screening box, and a movable gear seat is connected to the protruding end of the linear drive component, and the movable gear seat is rotatably connected to one end of the rotating roller.

[0009] Preferably: the reciprocating drive assembly includes a transversely arranged drive shaft rotatably connected to the frame, a drive turntable is keyed at the end of the drive shaft, a connecting rod structure is installed at the eccentric position of the drive turntable through a pin, and the end of the connecting rod structure is pivotally connected to a hinged mounting seat installed on the mounting base; it also includes a drive motor fixed to the frame, and a drive pulley pair is installed between the output shaft of the drive motor and the drive shaft.

[0010] Preferably: the connecting rod structure includes a double-headed screw rod, and fisheye joints are threaded on both ends of the double-headed screw rod, and the two groups of fisheye joints are pivotally connected to the driving turntable and the hinged mounting seat respectively; a mounting plate member located between the two groups of fisheye joints is passed through the double-headed screw rod, and at least two groups of screws slidingly connected to the two groups of mounting plates are passed through the two groups of mounting plates, and also include a buffer spring sleeved on each screw, and the two ends of the buffer spring are respectively tightly contacted with the two groups of mounting plates.

[0011] Preferably: a first discharge port is installed at the discharge end of the first screening box and the third screening box; a second discharge port is installed at the discharge end of the bottom collecting box and the second screening box; a guide slope is provided in the inner cavity of the bottom collecting box and each screening box for guiding the screened material to the discharge port, and the inclination directions of the two adjacent groups of guide slopes are symmetrical to each other.

[0012] Preferably: the opening and closing valve assembly includes an opening and closing motor fixed to the top cover, an opening and closing rotating shaft is installed on the output shaft of the opening and closing motor, and the opening and closing rotating shaft passes through each screening box and the bottom collecting box; a plurality of groups of sieve plate units located in the corresponding screening boxes and the bottom collecting box are installed on the opening and closing rotating shaft; the sieve plate unit includes a short valve plate and a long valve plate fixed to the outer peripheral wall of the opening and closing rotating shaft, and the angle between the short valve plate and the long valve plate is an obtuse angle. When the discharge ports of each screening box and the bottom collecting box are in a closed state, the short valve plate is in a state perpendicular to the corresponding guide slope.

[0013] Preferably, each first discharge port and each second discharge port is provided with a plug plate for controlling the discharge condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the lower structure of the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the cleaning component in the utility model;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the opening and closing valve assembly in the utility model;

[0019] Figure 6 It is a three-dimensional schematic diagram of the internal structure of the utility model.

[0020] In the figure: 1, walking wheel; 2, angle steel track; 3, vibration motor; 4, mounting base; 5, frame; 6, reciprocating drive assembly; 6-1, drive motor; 6-2, drive shaft; 6-3, drive pulley pair; 6-4, connecting rod structure; 6-5, hinged mounting seat; 6-6, drive turntable; 7, bottom collection box; 8, cleaning assembly; 8-1, cleaning rack; 8-2, cleaning gear; 8-3, cleaning brush; 8-4, rotating roller; 8-5, moving gear seat; 8-6 , linear drive member; 8-7, roller brush holder; 8-8, cleaning roller brush; 9, first screening box; 10, second screening box; 11, third screening box; 12, top cover; 13, feed inlet; 14, opening and closing valve assembly; 14-1, opening and closing motor; 14-2, opening and closing shaft; 14-3, short valve plate; 14-4, long valve plate; 15, first discharge port; 16, second discharge port; 17, first screen; 18, second screen; 19, third screen; 20, guide ramp. DETAILED DESCRIPTION

[0021] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0022] See also Figure 1 and Figure 2 The multi-stage screening device for pellet feed of the utility model includes a frame 5, on which are installed two sets of angle steel rails 2 which are arranged in parallel and inclined with the upper one higher and the lower one lower. It also includes a mounting base 4 which is in rolling contact with the angle steel rails 2 through multiple sets of walking wheels 1, and also includes a reciprocating drive assembly 6 installed on the frame 5, which is used to drive the mounting base 4 to reciprocate along the extension direction of the angle steel rails 2.

[0023] See also Figure 3The reciprocating drive assembly 6 includes a transversely arranged driving shaft 6-2 rotatably connected to the frame 5, and the driving shaft 6-2 is rotatably connected to the frame 5 through a seat bearing. A driving turntable 6-6 is keyed at the end of the driving shaft 6-2, and a connecting rod structure 6-4 is installed at the eccentric position of the driving turntable 6-6 through a pin, and the end of the connecting rod structure 6-4 is pivotally connected to a hinged mounting seat 6-5 installed on the mounting base 4; it also includes a driving motor 6-1 fixed to the frame 5, and a driving pulley pair 6-3 is installed between the output shaft of the driving motor 6-1 and the driving shaft 6-2.

[0024] Among them, the above-mentioned driving pulley pair 6-3 includes a driving pulley keyed on the output shaft of the driving motor 6-1, and also includes a driven pulley keyed on the driving shaft 6-2, and a belt in a closed state is connected between the driving pulley and the driven pulley for transmission; the driving pulley adopts a small gear, and the driven pulley adopts a large gear.

[0025] In addition, in order to prevent the vibration generated during the operation of the screening device from damaging the reciprocating drive assembly 6, the above-mentioned connecting rod structure 6-4 includes a double-headed screw, and fisheye joints are screwed on both ends of the double-headed screw. The two groups of fisheye joints are pivotally connected to the driving turntable 6-6 and the hinged mounting seat 6-5 respectively; a mounting plate located between the two groups of fisheye joints is inserted on the double-headed screw, and at least two groups of screws are inserted between the two groups of mounting plates to be slidably connected to the two groups of mounting plates, and also includes a buffer spring sleeved on each screw, and the two ends of the buffer spring are respectively in tight contact with the two groups of mounting plates. Through the above-mentioned arrangement, the buffer spring can be used to absorb the vibration generated during the reciprocating movement of the mounting base 4, so as to prevent the generated vibration from damaging the driving shaft 6-2.

[0026] like Figure 1 and Figure 2As shown, the present embodiment further includes a bottom collection box 7 installed on the mounting base 4, and a vibration motor 3 is installed at the bottom of the bottom collection box 7. In addition, the bottom collection box 7, the first screening box 9, the second screening box 10 and the third screening box 11 are stacked and installed from bottom to top on the mounting base 4, and a first screen 17 is installed at the docking and connecting position between the bottom collection box 7 and the first screening box 9, a second screen 18 is installed at the docking and connecting position between the first screening box 9 and the second screening box 10, and a third screen 19 is installed at the docking and connecting position between the second screening box 10 and the third screening box 11. The present embodiment further includes a top cover 12 installed on the top of the third screening box 11, and a feed port 13 connected to the inner cavity of the third screening box 11 is installed on the top cover 12. The sieve holes on the first screen 17, the second screen 18 and the third screen 19 are enlarged in sequence, thereby ensuring that during the working process, the first screen 17 can screen out the feed with the largest particles, followed by the second screen 18, and then the first screen 17, and finally the feed with the smallest particles falls into the bottom collection box 7. The inclination direction of each of the above-mentioned screens is consistent with the inclination direction of the angle steel track 2.

[0027] In addition, a first discharge port 15 is installed at the discharge end of the first screening box 9 and the third screening box 11; a second discharge port 16 is installed at the discharge end of the bottom collecting box 7 and the second screening box 10. Figure 1 and Figure 6 A plug plate for controlling the discharge condition is inserted on each first discharge port 15 and each second discharge port 16 .

[0028] Guide slopes 20 are provided in the inner cavity of the bottom collecting box 7 and each screening box for guiding the screened materials to the discharge port. In addition, the inclination directions of the two adjacent groups of guide slopes 20 are symmetrical to each other.

[0029] like Figure 1 As shown, this embodiment also includes an on-off valve assembly 14 for synchronously controlling the opening and closing states of the discharge ports of the bottom collection box 7 and each screening box. Figure 5 and Figure 6The above-mentioned opening and closing valve assembly 14 includes an opening and closing motor 14-1 fixedly connected to the top cover 12, and an opening and closing rotating shaft 14-2 is installed on the output shaft of the opening and closing motor 14-1, and the opening and closing rotating shaft 14-2 passes through each screening box and the bottom collecting box 7; a plurality of groups of sieve plate units respectively located in the corresponding screening boxes and the bottom collecting box 7 are installed on the opening and closing rotating shaft 14-2. The above-mentioned sieve plate unit includes a short valve plate 14-3 and a long valve plate 14-4 fixedly connected to the outer peripheral wall of the opening and closing rotating shaft 14-2, wherein the angle between the above-mentioned short valve plate 14-3 and the long valve plate 14-4 is an obtuse angle, and when the discharge ports of each screening box and the bottom collecting box 7 are in a closed state, the short valve plate 14-3 is in a state perpendicular to the corresponding guide inclined surface 20.

[0030] In order to avoid the clogging of the above-mentioned screens, a cleaning assembly 8 is installed in each screening box for cleaning the screens; see Figure 2 and Figure 4 The cleaning assembly 8 includes a rotating roller 8-4. Two groups of strip holes are provided on the side wall of the screening box and are arranged parallel to and opposite to the angle steel track 2. The two ends of the rotating roller 8-4 are respectively inserted into the corresponding strip holes and are matched with the gap of the strip holes. A cleaning brush 8-3 and a roller brush holder 8-7 are installed on the outer peripheral wall of the rotating roller 8-4. A cleaning roller brush 8-8 is rotatably connected to the roller brush holder 8-7. A cleaning driving mechanism for driving the rotating roller 8-4 to reciprocate and rotate synchronously is also included.

[0031] like Figure 4 As shown, the cleaning drive mechanism includes two sets of cleaning racks 8-1 arranged in parallel, and the inclination direction of the cleaning racks 8-1 is consistent with the inclination direction of the screen; the two sets of cleaning racks 8-1 are installed on the side walls of the corresponding screening box, and cleaning gears 8-2 are keyed at both ends of the rotating roller 8-4, and each cleaning gear 8-2 is meshed with the corresponding cleaning rack 8-1; it also includes a linear drive member 8-6 installed on the corresponding screening box, and a moving gear seat 8-5 is connected to the protruding end of the linear drive member 8-6, and the moving gear seat 8-5 is rotatably connected to one end of the rotating roller 8-4. The linear drive member 8-6 adopts a linear cylinder or a linear electric cylinder.

[0032] Working process:

[0033] The material is poured into the multi-stage screening device of the utility model from the feed port 13, at which time each sieve plate unit in the opening and closing valve assembly 14 is in a state of closing the corresponding discharge port; the vibration motor 3 and the drive motor 6-1 in the reciprocating drive assembly 6 are turned on, and each screening box in the screening device is synchronously vibrated and reciprocated, and then the feed particles are screened through the first screen 17, the second screen 18 and the third screen 19, and the feed of different particle sizes required is screened out at one time;

[0034] After working for a preset time, the motor 6-1 is closed and driven, and the plug plates inserted on each first discharge port 15 and each second discharge port 16 are pulled out, and then the opening and closing motor 14-1 in the opening and closing valve assembly 14 is started to drive the opening and closing shaft 14-2 to rotate, so that the sieve plate unit composed of the short valve plate 14-3 and the long valve plate 14-4 rotates a certain angle, and then the corresponding discharge port is opened, and the feed particles of different particle sizes screened out in each screening box and the bottom collecting box 7 fall into the collecting box arranged below the corresponding discharge port, so as to achieve the purpose of screening out the feed of different particle sizes required at one time;

[0035] After completing the above-mentioned one-time screening operation, turn on the linear drive member 8-6 in the cleaning assembly 8 to drive the movable gear seat 8-5 installed at its protruding end to move. Since the cleaning gear 8-2 and the cleaning rack 8-1 are meshed, the movement of the movable gear seat 8-5 can drive the rotating roller 8-4 rotatably connected thereto to move and rotate synchronously, so that the cleaning brush 8-3 and the cleaning roller brush 8-8 arranged on the rotating roller 8-4 can clean the corresponding screen to avoid blockage of the screen and affect the normal operation of the screening device.

Claims

1. A multi-stage screening device for pellet feed, characterized in that: The invention comprises a frame (5), on which two groups of angle steel rails (2) are installed, which are arranged in parallel and are arranged in an inclined manner with the upper part higher than the lower part; a mounting base (4) which is in rolling contact with the angle steel rails (2) through multiple groups of running wheels (1); and a reciprocating drive assembly (6) installed on the frame (5) for driving the mounting base (4) to reciprocate along the extension direction of the angle steel rails (2); a bottom collection box (7) installed on the mounting base (4), and a vibration motor (3) installed at the bottom of the bottom collection box (7); a bottom collection box (7), a first screening box (9), a second screening box (10) and a third screening box (11) which are interconnected are stacked and installed from bottom to top on the mounting base (4); a first screen (17) is installed at a butt-joint connection position between the bottom collection box (7) and the first screening box (9); a second screen (18) is installed at a butt-joint connection position between the first screening box (9) and the second screening box (10); and a third screening box (11) is installed at a butt-joint connection position between the second screening box (10) and the second screening box (11). A third screen (19) is installed at a butt connection position between the first screen (10) and the third screen box (11); the screen holes on the first screen (17), the second screen (18) and the third screen (19) are successively larger; a top cover (12) is installed on the top of the third screen box (11), and a feed port (13) connected to the inner cavity of the third screen box (11) is installed on the top cover (12); a cleaning assembly (8) is installed in each screening box for cleaning the screen. The invention relates to a device for cleaning a net; and also comprises an on-off valve assembly (14) for synchronously controlling the opening and closing states of the discharge ports of the bottom collecting box (7) and each screening box; the cleaning assembly (8) comprises a rotating roller (8-4), a cleaning brush (8-3) and a roller brush holder (8-7) are mounted on the outer peripheral wall of the rotating roller (8-4), and a cleaning roller brush (8-8) is rotatably connected to the roller brush holder (8-7); and also comprises a cleaning driving mechanism for driving the rotating roller (8-4) to reciprocate and rotate synchronously.

2. The multi-stage screening device for pellet feed according to claim 1, characterized in that: The cleaning drive mechanism comprises two groups of cleaning racks (8-1) arranged in parallel, the inclination direction of the cleaning racks (8-1) being consistent with the inclination direction of the screen; the two groups of cleaning racks (8-1) being installed on the side walls of the corresponding screening box, cleaning gears (8-2) being key-connected at both ends of the rotating roller (8-4), and each cleaning gear (8-2) being meshed with the corresponding cleaning rack (8-1); and a linear driving member (8-6) being installed on the corresponding screening box, a moving gear seat (8-5) being connected at the protruding end of the linear driving member (8-6), and the moving gear seat (8-5) being rotatably connected to one end of the rotating roller (8-4).

3. The multi-stage screening device for pellet feed according to claim 1, characterized in that: The driving assembly (6) comprises a transversely arranged driving shaft (6-2) rotatably connected to the frame (5), a driving turntable (6-6) being key-connected to the end of the driving shaft (6-2), a connecting rod structure (6-4) being installed at an eccentric position of the driving turntable (6-6) via a pin, and an end of the connecting rod structure (6-4) being pivotally connected to a hinged mounting seat (6-5) installed on the mounting base (4); and a driving motor (6-1) fixedly connected to the frame (5), and a driving pulley pair (6-3) being installed between the output shaft of the driving motor (6-1) and the driving shaft (6-2).

4. The multi-stage screening device for pellet feed according to claim 3, characterized in that: The connecting rod structure (6-4) comprises a double-headed screw rod, and fisheye joints are screwed on both ends of the double-headed screw rod, and the two groups of fisheye joints are respectively pivotally connected to the driving rotating disk (6-6) and the hinged mounting seat (6-5); a mounting plate member located between the two groups of fisheye joints is passed through the double-headed screw rod, and at least two groups of screws are passed between the two groups of mounting plate members and are slidably connected to the two groups of mounting plate members, and also includes a buffer spring sleeved on each screw, and the two ends of the buffer spring are respectively in tight contact with the two groups of mounting plate members.

5. The multi-stage screening device for pellet feed according to claim 1, characterized in that: The first screening box (9) and the third screening box (11) are both provided with a first discharge port (15) at their discharge ends; the second discharge port (16) is both provided with a second discharge port (16) at the discharge ends of the bottom collecting box (7) and the second screening box (10); and the inner cavities of the bottom collecting box (7) and each screening box are both provided with a guide inclined surface (20) for guiding the screened material to the discharge port, and the inclination directions of the two groups of guide inclined surfaces (20) adjacent to each other are symmetrical to each other.

6. The multi-stage screening device for pellet feed according to claim 1, characterized in that: The opening and closing valve assembly (14) includes an opening and closing motor (14-1) fixedly connected to the top cover (12), an opening and closing rotating shaft (14-2) installed on the output shaft of the opening and closing motor (14-1), and the opening and closing rotating shaft (14-2) passes through each screening box and the bottom collection box (7); a plurality of groups of sieve plate units respectively located in the corresponding screening boxes and the bottom collection box (7) are installed on the opening and closing rotating shaft (14-2); the sieve plate unit includes a short valve plate (14-3) and a long valve plate (14-4) fixedly connected to the outer peripheral wall of the opening and closing rotating shaft (14-2), and the angle between the short valve plate (14-3) and the long valve plate (14-4) is an obtuse angle. When the discharge ports of each screening box and the bottom collection box (7) are in a closed state, the short valve plate (14-3) is in a state perpendicular to the corresponding guide inclined surface (20).

7. The multi-stage screening device for pellet feed according to claim 5, characterized in that: Each first discharge port (15) and each second discharge port (16) is provided with a plug plate for controlling the discharge condition.

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