Preliminary screening device

Abstract

The utility model relates to the technical field of screening devices, in particular to a preliminary screening device which comprises a U-shaped frame and three screening units arranged in the U-shaped frame, a conveying belt is arranged at an opening in one side of the U-shaped frame and used for conveying konjak to the screening units, each screening unit comprises a plurality of rotating rollers rotationally connected in the U-shaped frame, and the rotating rollers are arranged on the U-shaped frame. A screening channel is formed by the distance between every two adjacent rotating rollers, and a uniform pushing assembly is arranged above the conveying belt. The uniform pushing assembly can uniformly push konjak placed on the conveying belt, so that the stacking height of the konjak is prevented from being too high, after the konjak is conveyed to the screening unit from the conveying belt, the stacking height of the screening unit is not prone to being too high, and the situation that small konjak is stacked above the konjak with large size is not prone to occurring. Therefore, the situation that the small-size konjak is not easy to screen at the beginning, part of the small-size konjak enters the rear part along with the large-size konjak to be screened to the large-size konjak, and consequently screening is not thorough can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of screening device technology, and more specifically, to a preliminary screening device. Background Technology

[0002] After harvesting, konjac needs to be initially sorted according to its size, because different sizes of konjac will have different selling prices later, and different sizes of konjac will also have different uses. Therefore, konjac of different sizes will be sorted.

[0003] Currently, konjac sorting is done manually or by machine. Manual sorting suffers from inconsistencies in size judgment due to individual differences in perception, resulting in inconsistent sorting sizes. Furthermore, manual sorting is inefficient. Machine sorting often involves either manually dumping piles of konjac into the sorting device's inlet or the machine pushing them in all at once. This results in a large pile of konjac falling onto the device at once, creating a situation where larger konjac pieces are at the bottom and smaller pieces at the top. Since sorting typically prioritizes smaller pieces over larger ones, smaller pieces are initially harder to remove, sometimes flowing with the larger pieces and ending up in the larger pile, leading to incomplete sorting. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a preliminary screening device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A preliminary screening device includes a U-shaped frame and three screening units arranged sequentially along the length of the U-shaped frame. The screening units are used to screen konjac of different sizes. A conveyor belt is provided at the opening on one side of the U-shaped frame to transport the konjac to the screening units. Each screening unit includes multiple rotating rollers rotatably connected within the U-shaped frame. The distance between two adjacent rotating rollers forms a screening channel, which increases in size from the opening on one side of the U-shaped frame to the closed end on the other side. The output end of the conveyor belt is located above the rotating rollers at the opening on one side of the U-shaped frame. A leveling component is provided above the conveyor belt to evenly level the konjac on it. A hopper is fixedly connected to the bottom of the U-shaped frame. Each screening unit has a feeding chamber located below it. Two staggered and inclined guide plates are installed in each feeding chamber along its height. The device also includes a drive unit that drives all the rotating rollers to rotate in the same direction.

[0007] Preferably, in two adjacent screening units, the sorting end of one screening unit shares the same rotating roller with the initial end of the other screening unit. A second stop is provided below the rotating roller. The bottom of the second stop is fixedly connected to the top of the hopper, and the two ends of the second stop are fixedly connected to the inner walls of the U-shaped frame.

[0008] Preferably, a first stop is provided below the roller at the opening on one side of the U-shaped frame. The bottom of the first stop is fixedly connected to the top of the hopper, and the two ends of the first stop are fixedly connected to the two sides of the inner wall of the U-shaped frame.

[0009] Preferably, it also includes two parallel side plates, one end of which is fixedly connected to the end of the U-shaped frame. A first transmission roller is rotatably connected between the inner walls of the two sides of the U-shaped frame. The first transmission roller is located directly above the rotating roller at the opening on one side of the U-shaped frame. A second transmission roller is rotatably connected between the two side plates. The conveyor belt is sleeved on the first and second transmission rollers. The second transmission roller is driven to rotate by the first motor.

[0010] Preferably, the smoothing assembly includes a pusher plate and a drive mechanism for moving the pusher plate along the length direction of the side plates. The pusher plate is located between the two side plates and above the conveyor belt.

[0011] Preferably, the driving mechanism includes a second motor, a guide rod, and a lead screw. Each of the two side plates has a strip groove on one side that is close to each other. The strip groove is arranged along the length of the side plate. An end plate is fixedly connected to the side of the two side plates away from the U-shaped frame. The side of the strip groove near the end plate is open. A guide rod is provided in one strip groove, and a lead screw is rotatably provided in the other strip groove. Slider blocks are fixedly connected to both ends of the push plate. The two sliders are slidably arranged in the two strip grooves respectively. The guide rod passes through one slider, and the lead screw passes through the other slider and is threadedly connected to it. The second motor is mounted on the end plate and drives the lead screw to rotate.

[0012] Preferably, a detachable baffle is provided between the two side plates near the U-shaped frame, and a vertically arranged T-shaped groove is provided on the side of the two side plates that are close to each other. The upper end of the T-shaped groove is open, and both ends of the baffle are fixedly connected with T-shaped blocks that are slidably adapted to the T-shaped groove.

[0013] Preferably, the driving component includes a third motor mounted on one side of the U-shaped frame, the output shaft of the third motor being coaxially connected to the end of one of the rotating rollers, and adjacent rotating rollers being connected by a sprocket and chain transmission.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This preliminary screening device includes a conveyor belt and a smoothing component. The smoothing component can spread the konjac on the conveyor belt evenly, thus preventing the konjac from piling up too high. This way, after the konjac is conveyed from the conveyor belt to the screening unit, the screening unit is less likely to have excessively high stacking height, and it is less likely that smaller konjac will be piled on top of larger konjac. This effectively avoids the situation where small konjac is not easily screened out at the beginning, and some small konjac enters the screening area with the larger konjac, resulting in incomplete screening. Attached Figure Description

[0016] Figure 1 This is one of the overall structural schematic diagrams of this utility model.

[0017] Figure 2 This is the second schematic diagram of the overall structure of this utility model.

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the side plate and conveyor belt in this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the U-shaped frame, rotating roller, and feeding hopper in this utility model.

[0021] Figure 6 This is a cross-sectional view of the hopper in this utility model.

[0022] Figure 7 This is a bottom view of the hopper structure of this utility model.

[0023] The meanings of the labels in the diagram are as follows: 10, side plate; 11, conveyor belt; 12, first motor; 13, baffle; 20, push plate; 30, end plate; 31, second motor; 32, trough; 33, guide rod; 34, lead screw; 40, U-shaped frame; 41, rotating roller; 42, third motor; 50, hopper; 500, discharge chamber; 501, discharge port; 51, guide plate; 52, first stop block; 53, second stop block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a technical solution:

[0026] A preliminary screening device, please refer to Figures 1-7 The system includes a U-shaped frame 40 and three screening units arranged sequentially along its length within the U-shaped frame 40. Each screening unit is used to screen konjac of different sizes. Each screening unit includes multiple rotating rollers 41 rotatably connected within the U-shaped frame 40. The distance between two adjacent rotating rollers 41 forms a screening channel. The screening channel increases in size from one open end to the other closed end of the U-shaped frame 40. When the konjac is conveyed by the rotating rollers 41, if the size of the konjac is smaller than the distance between two adjacent rotating rollers 41, the konjac will fall from the screening channel between the two rotating rollers 41, thereby achieving screening.

[0027] In this application, the konjac sieving unit closest to the opening of the U-shaped frame 40 sieving unit sieving a smaller volume of konjac, the konjac sieving unit farther from the opening of the U-shaped frame 40 sieving unit sieving a larger volume of konjac, and the konjac sieving unit located between the two sieving units sieving a moderate volume of konjac.

[0028] A conveyor belt 11 is provided at one side opening of the U-shaped frame 40. The conveyor belt 11 is used to transport konjac to the screening unit. The output end of the conveyor belt 11 is located above the rotating roller 41 at one side opening of the U-shaped frame 40. There is a small gap of about 1cm-2cm between the lower part of the conveyor belt 11 and the top of the rotating roller 41 at one side opening of the U-shaped frame 40, which will not cause interference during rotation. In addition, the small gap of about 1cm-2cm will not allow konjac to pass through. When the conveyor belt 11 is in motion, it can transport the konjac on the conveyor belt 11 to the screening unit for screening.

[0029] This application also includes two parallel side plates 10. One end of the side plate 10 is fixedly connected to the end of the U-shaped frame 40. A transmission roller 1 is rotatably connected between the inner walls of the two sides of the U-shaped frame 40. The transmission roller 1 is close to the side plate 10 and is located directly above the rotating roller 41 at the opening on one side of the U-shaped frame 40. A transmission roller 2 is rotatably connected between the two side plates 10. The conveyor belt 11 is sleeved on the transmission roller 1 and the transmission roller 2. The transmission roller 2 is driven to rotate by a first motor 12. The first motor 12 is fixedly installed on one of the side plates 10. The output shaft of the first motor 12 is coaxially connected to one end of the transmission roller 2. The first motor 12 can drive the transmission roller 2 to rotate, thereby driving the conveyor belt 11 to transport the konjac on the conveyor belt 11 to the screening unit.

[0030] Workers need to first put the konjac into the conveyor belt 11, and then transport the konjac through the conveyor belt 11.

[0031] A leveling component is provided above the conveyor belt 11 to evenly push the konjac on the conveyor belt 11. The leveling component can evenly push the konjac placed on the conveyor belt 11, thereby preventing the konjac from stacking too high. In this way, after the konjac is conveyed from the conveyor belt 11 to the screening unit, the screening unit is not likely to stack too high, and it is not easy for smaller konjac to be piled on top of larger konjac. This can effectively avoid the situation where small konjac is not easy to be screened out at the beginning, and some small konjac enters the screening area with the large konjac, resulting in incomplete screening.

[0032] Specifically, the smoothing component includes a pusher plate 20 and a drive mechanism that drives the pusher plate 20 to move along the length of the side plate 10. The pusher plate 20 is located between the two side plates 10 and above the conveyor belt 11. The lower part of the pusher plate 20 is a certain distance from the top of the conveyor belt 11.

[0033] The drive mechanism includes a second motor 31, a guide rod 33, and a lead screw 34. Each of the two side plates 10 has a strip groove 32 on its side closest to each other. The strip groove 32 is arranged along the length of the side plate 10. An end plate 30 is fixedly connected to the side of each side plate 10 away from the U-shaped frame 40. The side of the strip groove 32 closest to the end plate 30 is open. A guide rod 33 is installed inside one of the strip grooves 32. One end of the guide rod 33 is fixedly connected to the end plate 30, and the other end is fixedly connected to the inner wall of the strip groove 34. 3. A lead screw 34 is rotatably installed in another strip groove 32 along the length of the strip groove 32. The lead screw 34 is installed along the length of the strip groove 32. Slider blocks are fixedly connected to both ends of the push plate 20. The two sliders are slidably installed in the two strip grooves 32 respectively. The guide rod 33 passes through one of the sliders, and the lead screw 34 passes through the other slider and is threadedly connected to it. The second motor 31 is installed on the end plate 30 and drives the lead screw 34 to rotate. The output shaft of the second motor 31 is coaxially connected to the end of the lead screw 34.

[0034] It is worth noting that the distance between the input end of the conveyor belt 11 and the end plate 30 is 1cm-2cm, and the two will not interfere with each other.

[0035] By starting the second motor 31, the lead screw 34 can be rotated, which in turn can drive the push plate 20 to move along the length of the lead screw 34. This can flatten the konjac placed on the conveyor belt 11, preventing the konjac from piling up too high on the conveyor belt 11, thus facilitating its transport to the screening unit. Of course, when flattening the konjac on the conveyor belt 11, the conveyor belt 11 is not in motion.

[0036] To prevent some konjac from falling from the output end of the conveyor belt 11 into the screening unit when the pushing component flattens the konjac on the conveyor belt 11, this application provides a detachable baffle 13 between the two side plates 10 near the U-shaped frame 40. Each of the two side plates 10 has a vertically arranged T-shaped groove on the side that is close to each other. The upper end of the T-shaped groove is open. Both ends of the baffle 13 are fixedly connected to T-shaped blocks that slide and adapt to the T-shaped groove. Through the sliding cooperation of the T-shaped blocks and the T-shaped groove, the baffle 13 can be placed on the two side plates 10. The baffle 13 can block the konjac and prevent it from falling into the screening unit.

[0037] After the baffle 13 is placed on the two side plates 10, there is a 1cm-2cm gap between the bottom of the baffle 13 and the upper part of the conveyor belt 11, which prevents konjac from passing through. The lower part of the push plate can be set in the shape of a rake.

[0038] The upper part of the baffle 13 is provided with a through hole, which makes it easy for the hand to reach in, thus making it convenient for the staff to insert and remove the baffle 13.

[0039] It also includes a drive unit that drives all the rotating rollers 41 to rotate in the same direction; the drive unit includes a third motor 42 installed on one side of the U-shaped frame 40, the output shaft of the third motor 42 is coaxially connected to the end of one of the rotating rollers 41, and adjacent two rotating rollers 41 are connected by a sprocket and chain transmission (this sprocket and chain transmission is a conventional technology); the third motor 42 can drive the rotating rollers 41 to rotate, and when the rotating rollers 41 rotate, they will drive the konjac on the rotating rollers 41 to move.

[0040] A hopper 50 is fixedly connected to the bottom of the U-shaped frame 40. Each hopper 50 has a discharge chamber 500 located below each screening unit. Each discharge chamber 500 contains two staggered and inclined guide plates 51 installed along its height. For details, please refer to... Figure 6 It can be seen that the guide plate 51 in the middle feeding chamber 500 is set in a different direction than the two sides. The guide plate 51 at the top of the middle feeding chamber 500 is located on the right side of the feeding hopper 50, while the guide plates 51 at the top of the two feeding chambers 500 are located on the left side of the feeding hopper 50. Thus, the guide plate 51 at the bottom of the middle feeding chamber 500 will also be different from the guide plates 51 at the bottom of the two feeding chambers 500.

[0041] See Figure 7 It can be seen that the guide plates 51 at the bottom of the three feeding chambers 500 form discharge ports 501 in the gap between the discharge chambers 500 and the discharge ports 501. The discharge ports 501 on both sides are located on one side, and the discharge port in the middle is located on the other side. This makes it convenient to collect the konjac from both sides. Of course, in actual collection, a collection frame will be placed below the corresponding discharge port 501 to collect the konjac after screening.

[0042] The purpose of setting the guide plate 51 is to prevent the konjac after being screened from the screening channel from falling directly into the collection frame from a height, causing excessive impact and damage to the konjac. The guide plate 51 can play a good buffering role, and a flexible pad can also be fixedly connected to the top of the guide plate 51 to further reduce the impact force.

[0043] Two adjacent screening units share the same rotating roller 41 at the end of one screening unit and the beginning of the other screening unit. A second stop 53 is provided below the rotating roller 41. The bottom of the second stop 53 is fixedly connected to the top of the hopper 50, and both ends of the second stop 53 are fixedly connected to the inner walls of the U-shaped frame 40. The distance between the top of the second stop 53 and the rotating roller 41 is 1cm-2cm. The second stop 53 is set to prevent konjac from falling into the wrong place between two adjacent screening units.

[0044] A first stop 52 is provided below the rotating roller 41 at the opening on one side of the U-shaped frame 40. The bottom of the first stop 52 is fixedly connected to the top of the hopper 50, and the two ends of the first stop 52 are fixedly connected to the inner walls of the U-shaped frame 40. The purpose of the first stop 52 is to prevent the konjac from falling to the ground. The distance between the top of the first stop 52 and the rotating roller 41 is 1cm-2cm.

[0045] Support legs are fixedly connected to the bottom of the side plate 10 near both sides, and support frames are fixedly connected to both sides of the U-shaped frame 40. The bottom heights of the support frames and support legs are the same. It is worth noting that the height of the side plate 10 in this application is between 1.2m and 1.4m. When the pushing component pushes the konjac on the conveyor belt, the workers can also manually assist in pushing the konjac down to flatten it.

[0046] It is worth noting that the device requires staff supervision during actual use, and the staff needs to be able to control the start and stop of each motor.

Claims

1. A preliminary screening device, comprising a U-shaped frame (40) and three screening units arranged sequentially along the length of the U-shaped frame (40), wherein the screening units are used to screen konjac of different sizes, characterized in that: A conveyor belt (11) is provided at the opening on one side of the U-shaped frame (40). The conveyor belt (11) is used to transport konjac to the screening unit. The screening unit includes multiple rotating rollers (41) rotatably connected in the U-shaped frame (40). The distance between two adjacent rotating rollers (41) forms a screening channel. The screening channel increases in size from the opening on one side of the U-shaped frame (40) to the closed end on the other side. The output end of the conveyor belt (11) is located above the rotating rollers (41) at the opening on one side of the U-shaped frame (40). A pushing component is provided above the conveyor belt (11) to push the konjac on the conveyor belt (11) evenly. A feeding hopper (50) is fixedly connected to the bottom of the U-shaped frame (40). A feeding chamber (500) is provided in the feeding hopper (50) below each screening unit. Two staggered and inclined guide plates (51) are installed in each feeding chamber (500) along its height direction. It also includes a driving component that drives all rotating rollers (41) to rotate in the same direction.

2. The preliminary screening device according to claim 1, characterized in that: Two adjacent screening units share the same rotating roller (41) at the end of one screening unit and the beginning of the other screening unit. A second stop (53) is provided below the rotating roller (41). The bottom of the second stop (53) is fixedly connected to the top of the hopper (50), and the two ends of the second stop (53) are fixedly connected to the inner walls of the U-shaped frame (40).

3. The preliminary screening device according to claim 1, characterized in that: A first stop (52) is provided below the roller (41) at the opening on one side of the U-shaped frame (40). The bottom of the first stop (52) is fixedly connected to the top of the hopper (50), and the two ends of the first stop (52) are fixedly connected to the two sides of the inner wall of the U-shaped frame (40).

4. The preliminary screening device according to claim 1, characterized in that: It also includes two parallel side plates (10), one end of which is fixedly connected to the end of the U-shaped frame (40), and a transmission roller 1 is rotatably connected between the inner walls of the two sides of the U-shaped frame (40). The transmission roller 1 is located directly above the rotating roller (41) at the opening on one side of the U-shaped frame (40), and a transmission roller 2 is rotatably connected between the two side plates (10). The conveyor belt (11) is fitted on the transmission roller 1 and the transmission roller 2, and the transmission roller 2 is driven to rotate by the first motor (12).

5. A preliminary screening device according to claim 4, characterized in that: The smoothing assembly includes a pusher plate (20) and a drive mechanism that drives the pusher plate (20) to move along the length of the side plate (10). The pusher plate (20) is located between the two side plates (10) and above the conveyor belt (11).

6. A preliminary screening device according to claim 5, characterized in that: The driving mechanism includes a second motor (31), a guide rod (33), and a lead screw (34). Each of the two side plates (10) has a strip groove (32) on the side that is close to each other. The strip groove (32) is arranged along the length of the side plate (10). The side of the two side plates (10) away from the U-shaped frame (40) is fixedly connected to an end plate (30). The side of the strip groove (32) close to the end plate (30) is open. One of the strip grooves (32) is provided with a guide rod (33), and the other strip groove (32) is rotatably provided with a lead screw (34). Both ends of the push plate (20) are fixedly connected with sliders. The two sliders are slidably arranged in the two strip grooves (32). The guide rod (33) passes through one of the sliders, and the lead screw (34) passes through the other slider and is threadedly connected to it. The second motor (31) is mounted on the end plate (30) and drives the lead screw (34) to rotate.

7. A preliminary screening device according to claim 6, characterized in that: A detachable baffle (13) is provided between the two side plates (10) near the U-shaped frame (40). A vertically arranged T-shaped groove is provided on the side of the two side plates (10) that are close to each other. The upper end of the T-shaped groove is open. Both ends of the baffle (13) are fixedly connected with T-shaped blocks that are slidably adapted to the T-shaped groove.

8. A preliminary screening device according to claim 1, characterized in that: The driving component includes a third motor (42) mounted on one side of the U-shaped frame (40). The output shaft of the third motor (42) is coaxially connected to the end of one of the rollers (41). The two adjacent rollers (41) are connected by a sprocket and chain drive.

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