Grading type wild jujube screening equipment
By combining a downward-inclined grading drum screen with rotary motion, continuous automated screening of jujubes is achieved, solving the problems of low efficiency and high damage rate of existing equipment, and improving grading accuracy and production efficiency.
Patent Information
- Application Number
- CN202511661718.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-01-02
AI Technical Summary
Existing jujube grading and screening equipment is inefficient, manual screening is labor-intensive and easily damages the fruit, and vibrating screening equipment is prone to fruit breakage, making it difficult to meet the needs of industrial production.
It adopts a downward-inclined grading drum screen, combined with rotational motion and gravity conveying, with screen holes of different sizes and shapes, equipped with linear guide components and baffles, and uses a drive mechanism to achieve continuous automated screening, and uses a collection mechanism for precise collection.
It improved screening efficiency, reduced jujube damage rate, ensured the stability and continuity of the screening process, reduced equipment failures, and improved overall production efficiency and fruit grading accuracy.
Smart Images
Figure CN121244514A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of screening mechanical equipment, and particularly relates to a grading type zizyphus jujuba miller screening device. BACKGROUND
[0002] As a wild fruit with medicinal and edible properties, zizyphus jujuba miller is rich in vitamins, organic acids and trace elements, and has extremely high economic value and broad market prospects. Its deep processing products, such as zizyphus jujuba miller kernels, zizyphus jujuba miller juice and zizyphus jujuba miller powder, are deeply loved by consumers. In the deep processing industry chain of zizyphus jujuba miller, the screening of raw materials is a crucial pretreatment link. The main purpose of screening is to classify zizyphus jujuba miller according to its size to meet the needs of different processing technologies. For example, large and medium fruits are suitable for making preserved fruits or extracting fruit pulp, while small fruits can be used for juicing or extracting zizyphus jujuba miller kernels.
[0003] At present, the grading and screening of zizyphus jujuba miller in the industry mainly relies on manual screening and vibrating screening equipment. However, manual screening is extremely inefficient, labor-intensive, and labor costs are high. Moreover, the screening standard is easily affected by factors such as the fatigue level and subjective judgment of the operator, resulting in unstable product quality between batches and difficulty in meeting the continuous operation needs of large-scale industrial production. The vibrating screening equipment uses high-frequency vibration principle for screening, which easily causes strong friction and impact between zizyphus jujuba miller and between zizyphus jujuba miller and the equipment, easily causing peel damage and fruit pulp extrusion, leading to deterioration and rotting of the raw materials, and thus affecting the quality of the final product.
[0004] Therefore, there is a need for a grading type zizyphus jujuba miller screening device that can improve the efficiency of grading and screening while reducing the damage rate of zizyphus jujuba miller. SUMMARY
[0005] The purpose of the present application is to provide a grading type zizyphus jujuba miller screening device that can improve the efficiency of grading and screening while reducing the damage rate of zizyphus jujuba miller.
[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:
[0007] A grading type zizyphus jujuba miller screening device, comprising a movable support inclined downward along the material conveying direction and provided with a driving mechanism, and a grading drum screen on the movable support controlled to rotate by the driving mechanism, the grading drum screen comprising small fruit screening zones and medium fruit screening zones arranged in sequence along the material conveying direction, and downwardly inclined material collecting mechanisms respectively arranged below the small fruit screening zones and the medium fruit screening zones and below the outlet of the medium fruit screening zones; when the zizyphus jujuba miller to be screened enters the small fruit screening zone inlet of the grading drum screen, the grading drum screen can rotate in the inclined direction of the movable support under the control of the driving mechanism to screen small, medium and large fruits and collect them by the corresponding material collecting mechanisms.
[0008] Further improvement of the technical scheme of the present application is that the cylinder wall of the small fruit screening area and the medium fruit screening area is respectively circumferentially and uniformly distributed with sieve holes suitable for the size of small fruit and medium fruit, the sieve holes of the medium fruit screening area adopt a circular or elliptical shape, and the sieve holes of the small fruit screening area adopt a circular, elliptical or strip shape, wherein the length direction of the strip-shaped sieve hole is arranged in parallel with the axial direction of the grading drum screen or is arranged in an inclined manner intersecting the axial direction of the grading drum screen.
[0009] Further improvement of the technical scheme of the present application is that the front and rear ends of the grading drum screen are respectively circumferentially provided with linear guide components suitable for the driving mechanism, and the small fruit screening area and the medium fruit screening area are sequentially located between the two linear guide components along the material conveying direction.
[0010] Further improvement of the technical scheme of the present application is that the movable support includes inclined beams symmetrically arranged on the left and right sides of the grading drum screen along the material conveying direction, vertical supports correspondingly arranged at the bottom of the inclined beams, and rollers arranged at the bottom of the vertical supports, wherein the vertical supports on the rear side of the two inclined beams are connected with a cross beam, and the cross beam is located below the entrance of the small fruit screening area of the grading drum screen.
[0011] Further improvement of the technical scheme of the present application is that the material collecting mechanism adopts a downwardly inclined material collecting plate, the material collecting plates below the small fruit screening area and the medium fruit screening area are respectively connected with the inclined beams on one side of the grading drum screen through the flow guide plates located on the upward rotating direction of the grading drum screen, and are inclined from the upward rotating direction of the grading drum screen to the downward rotating direction thereof.
[0012] Further improvement of the technical scheme of the present application is that a baffle is vertically arranged between the vertical supports on the front side of the two inclined beams, and the baffle is located below and adapted to the exit of the medium fruit screening area of the grading drum screen; the material collecting plate below the exit of the medium fruit screening area is connected with the bottom of the baffle and is arranged in a downwardly inclined manner along the material conveying direction.
[0013] Further improvement of the technical scheme of the present application is that a storage bag is placed below the material collecting plate, the material collecting plate is a plate structure provided with a baffle on both sides, a V-shaped flow dividing plate is arranged at the middle position of the outlet of the material collecting plate, and the material collecting plate is respectively provided with a clamping frame for fixing the storage bag on both sides of the flow dividing plate.
[0014] Further improvement of the technical scheme of the present application is that the clamping frame includes a U-shaped frame with one end abutting against the flow dividing plate and the other end abutting against the baffle on one side, a pin shaft with one end penetrating through the two vertical plates of the U-shaped frame and the other end being vertically and perpendicularly provided with a handle, two clamping rods on the outer side of the horizontal plate of the U-shaped frame are arranged side by side on the pin shaft and form an acute angle with the handle, and a recess groove suitable for the two clamping rods is formed on the lower side of the horizontal plate of the U-shaped frame, and the handle is connected with the vertical plate of the U-shaped frame on the same side through a return spring.
[0015] Further improvement of the technical scheme of the present application is that the linear guide component comprises guide rails and racks arranged circumferentially along the outer wall of the grading drum screen; the driving mechanism comprises two driving gears, two driven gears and a speed reducer motor, wherein the two driving gears are rotatably arranged on the two vertical supports at the bottom of the one side inclined beam along the inclined direction of the one side inclined beam and are meshed with the racks below the two ends of the grading drum screen, the two driven gears are rotatably arranged on the two vertical supports at the bottom of the other side inclined beam along the inclined direction of the other side inclined beam and are adapted with the guide rails below the two ends of the grading drum screen, and the speed reducer motor is connected with the two driving gears through a transmission shaft.
[0016] Further improvement of the technical scheme of the present application is that the cross beam at the rear side of the two inclined beams is provided with a downwardly inclined discharge hopper matched with the small fruit screening area inlet of the grading drum screen.
[0017] Thanks to the above technical scheme, the present application has achieved the following technical progress:
[0018] The grading type zizyphus jujuba sieving device of the present application reduces energy consumption by setting a downwardly inclined grading drum screen and using gravity to assist material conveying, realizes continuous and automated sieving operation through the rotating movement of the grading drum screen, significantly improves the sieving efficiency, and realizes efficient and accurate grading by dividing the sieving process into three levels of small fruit, medium fruit and large fruit and collecting them respectively.
[0019] The present application realizes accurate size grading by setting different sizes and shapes of screen holes for the small fruit screening area and the medium fruit screening area, especially uses strip-shaped screen holes for the small fruit screening area, increases the effective sieving area, improves the passing efficiency of small fruits, reduces clogging, and the strip-shaped screen holes are arranged obliquely intersecting the axial direction of the grading drum screen, which can guide the zizyphus jujuba to pass at a specific angle, further improving the sieving speed and smoothness, so as to improve the overall efficiency while ensuring the sieving accuracy, and avoid fruit damage caused by clogging and forced passing.
[0020] The present application ensures the stability and coaxiality of the grading drum screen during rotation by circumferentially arranging linear guide components at the front and rear ends of the grading drum screen, avoids shaking and eccentricity during equipment operation, not only prolongs the service life of the equipment, reduces the downtime for failure, ensures continuous and efficient sieving process, but also provides a more gentle sieving environment for zizyphus jujuba, reducing additional damage caused by equipment vibration.
[0021] The movable support structure of the present application realizes flexible movement of the equipment through the rollers, facilitates transfer between different work sites, and provides reliable support for the equipment through the stable support structure, thereby ensuring the stability of the screening process.
[0022] The guide plate of the present application is arranged on the side of the upward rotation of the grading drum screen, so that the jujube falling from the screen falls on the material collecting plate with the shortest distance and the smallest impact force, instead of directly falling from a high place, which greatly reduces the bruise damage of jujube caused by falling, and the material collecting plate inclined from the upward rotation direction side of the grading drum screen to the downward rotation direction side thereof guides the material by gravity, realizes the rapid and smooth collection of the screened material, and improves the collection efficiency.
[0023] The material collecting plate below the outlet of the medium fruit screening area is connected with the bottom of the baffle and is arranged downwardly along the material conveying direction, which can accurately guide the large fruit that cannot pass through the screen hole of the medium fruit screening area to the material collecting plate below.
[0024] The blocking strips on both sides of the material collecting plate of the present application can effectively prevent jujube from falling out during sliding, ensuring that all materials enter the collection area, and the inverted V-shaped shunt plate design can uniformly shunt the screened jujube to both sides to realize simultaneous loading into two storage bags, improving the packaging efficiency, and the special clamping frame design makes the installation and disassembly of the storage bag extremely convenient, further shortening the auxiliary operation time and improving the overall work efficiency.
[0025] The clamping frame of the present application realizes rapid clamping and loosening of the bag opening of the storage bag, and the operator only needs to operate the handle with one hand to complete the fixing or replacement of the bag, which is simple and labor-saving, and significantly reduces the labor intensity, and this efficient clamping method greatly shortens the time for replacing the storage bag, ensures the continuity of the screening operation, and thus improves the overall production efficiency.
[0026] The driving mechanism of the present application adopts a driving mode of meshing of the driving gear and the rack, which is stable and reliable in power transmission without the risk of slipping, ensures the constancy of the rotating speed of the grading drum screen, thereby ensuring the stability of the screening effect, the reduction motor drives two driving gears through the transmission shaft, which has compact structure, good synchronism and low energy consumption, the cooperation of the driven idler and the guide rail provides stable support for the grading drum screen, reduces the running resistance, and the whole driving mechanism is efficient and stable, which provides core power support for reducing the damage rate of jujube and improving the screening efficiency.
[0027] The present application is provided with a discharge hopper matched with the inlet of the small fruit screening area, which can guide the jujube to be screened into the grading drum screen in a concentrated and uniform manner, avoid blocking or accumulation of the material at the inlet, ensure the continuity and smoothness of the feeding, and at the same time, the inclined discharge hopper makes the jujube enter the screen cylinder of the grading drum screen gently, reducing the impact damage caused by direct pouring. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 is a structural schematic diagram of the graded Chinese wingnut screening device embodiment 1 of the present application;
[0029] Figure 2 is an assembly schematic diagram of the movable support, the discharge hopper and the baffle in the graded Chinese wingnut screening device embodiment 1 of the present application;
[0030] Figure 3 is an assembly schematic diagram of the movable support and the driving mechanism in the graded Chinese wingnut screening device embodiment 1 of the present application;
[0031] Figure 4 is an assembly schematic diagram of the movable support and the material collecting mechanism in the graded Chinese wingnut screening device embodiment 1 of the present application;
[0032] Figure 5 is an operation schematic diagram of the material collecting plate and the storage bag cooperating in material collecting in the graded Chinese wingnut screening device embodiment 1 of the present application;
[0033] Figure 6 is a structural schematic diagram of the graded Chinese wingnut screening device embodiment 2 of the present application;
[0034] Figure 7 is a structural schematic diagram of the graded Chinese wingnut screening device embodiment 3 of the present application;
[0035] Among them, 1, small fruit screening area, 2, medium fruit screening area, 3, guide rail, 4, rack, 5, inclined beam, 6, vertical support, 7, roller, 8, cross beam, 9, driving gear, 10, driven idler, 11, speed reducer motor, 12, transmission shaft, 13, baffle, 14, discharge hopper, 15, storage bag, 16, material collecting plate, 16-1, flow dividing plate, 16-2, clamping frame, 16-21, U-shaped frame, 16-22, pin shaft, 16-23, handle, 16-24, return spring, 16-25, clamping rod, 16-26, groove, 16-3, baffle, 17, guide plate. DETAILED DESCRIPTION
[0036] The present application will be further described in detail below in combination with embodiments:
[0037] Embodiment 1
[0038] As Figure 1As shown, the embodiment provides a hierarchical jujube screening device, which comprises a movable support provided with a driving mechanism and a grading drum screen, wherein the movable support is arranged downwardly inclined along the material conveying direction, that is, downwardly inclined from the rear to the front, and the grading drum screen is located on the movable support, that is, the grading drum screen is also arranged downwardly inclined along the material conveying direction and controlled to rotate by the driving mechanism on the movable support. Specifically, the grading drum screen comprises a small fruit screening area 1 and a medium fruit screening area 2 arranged in sequence along the material conveying direction, that is, the entire cylinder body of the grading drum screen is divided into two screening areas, the rear side of the grading drum screen is high as the small fruit screening area 1, and the front side thereof is low as the medium fruit screening area 2. Meanwhile, the lower sides of the small fruit screening area 1 and the medium fruit screening area 2 and the lower side of the outlet of the medium fruit screening area 2 are respectively provided with downwardly inclined material collecting mechanisms. When the jujubes to be screened enter the inlet of the small fruit screening area 1 of the grading drum screen, the grading drum screen can rotate in the inclined direction of the movable support under the control of the driving mechanism, so as to screen small, medium and large fruits, and then the corresponding material collecting mechanisms collect the small, medium and large fruits. That is, the small fruit screening area 1 is used for screening small fruits, the medium fruit screening area 2 is used for screening medium fruits, the small fruits screened by the small fruit screening area 1 and the medium fruits screened by the medium fruit screening area 2 are respectively collected by the corresponding material collecting mechanisms, and the large fruits not screened by the medium fruit screening area 2 enter the corresponding material collecting mechanism through the outlet of the medium fruit screening area 2. The hierarchical jujube screening device provided by the embodiment reduces energy consumption by setting the downwardly inclined grading drum screen and utilizing gravity to assist material conveying. The continuous and automatic screening operation is realized by the rotating movement of the grading drum screen, which significantly improves the screening efficiency. Meanwhile, the screening process is divided into three levels of small fruit, medium fruit and large fruit, and the small fruit, medium fruit and large fruit are respectively collected, so that the high efficiency and precision of grading are realized. Compared with the vibration or falling type screening, the rotating mode of the grading drum screen can more gently process the jujubes, which effectively reduces the collision damage rate of the fruits in the screening process. Specifically, the cylinder walls of the small fruit screening area 1 and the medium fruit screening area 2 are respectively circumferentially uniformly provided with screen holes adapted to the sizes of the small fruits and the medium fruits, and the screen holes of the small fruit screening area 1 and the medium fruit screening area 2 can adopt circular or elliptical shapes.
[0039] Further, the grading drum screen is respectively circumferentially provided with linear guide components adapted to the driving mechanism at the front and rear ends thereof, and the small fruit screening area 1 and the medium fruit screening area 2 of the grading drum screen are sequentially located between the two linear guide components along the material conveying direction, that is, along the material conveying direction, the grading drum screen sequentially comprises a linear guide component, the small fruit screening area 1, the medium fruit screening area 2 and another linear guide component from the rear to the front. By circumferentially setting the linear guide components at the front and rear ends of the grading drum screen, the stability and coaxiality of the grading drum screen in the rotating process are ensured, and the shaking and eccentricity of the device during operation are avoided, which not only prolongs the service life of the device, reduces the downtime for failure, ensures the continuous and efficient screening process, but also provides a more gentle screening environment for the jujubes, which reduces the additional damage caused by the vibration of the device.
[0040] Further, as shown in Figure 2 The movable support includes two inclined beams 5, four vertical supports 6, four rollers 7 and a cross beam 8. The two inclined beams 5 are symmetrically arranged on the left and right sides of the grading drum screen along the material conveying direction, that is, the two inclined beams 5 are arranged downwardly from back to front. The four vertical supports 6 are arranged in two groups, and the two vertical supports 6 in each group are arranged at the bottom of the inclined beams 5 from front to back, that is, the vertical support 6 on the front side of the inclined beam 5 is shorter, and the vertical support 6 on the rear side of the inclined beam 5 is longer. In order to facilitate movement, the bottom of each vertical support 6 is provided with a roller 7. The cross beam 8 is connected between the vertical supports 6 on the rear side of the two inclined beams 5 and located below the entrance of the small fruit screening area 1 of the grading drum screen. The movable support structure realizes flexible movement of the equipment through the rollers 7, which is convenient for transferring between different work sites. At the same time, the stable support structure provides reliable support for the equipment, ensuring the stability of the screening process.
[0041] Specifically, as shown in Figure 3 The linear guide component includes a guide rail 3 and a rack 4, which are respectively arranged circumferentially along the outer wall of the grading drum screen. The driving mechanism includes two driving gears 9, two driven idlers 10 and a speed reducer motor 11. The two driving gears 9 are arranged along the inclination direction of one side inclined beam 5, that is, the virtual connection line of the two driving gears 9 is in the inclination direction of the inclined beam 5, and also in the inclination direction of the grading drum screen. The two driving gears 9 are respectively rotatably arranged on the two vertical supports 6 at the bottom of the inclined beam 5 on the side, that is, the driving gear 9 can be installed on the corresponding vertical support 6 through a rotating shaft, a bearing and the like. The two driving gears 9 are respectively engaged with the rack 4 from the lower side of the rack 4 at the front and rear ends of the grading drum screen, that is, the two driving gears 9 are located below the side of the grading drum screen, supporting the grading drum screen from below the side of the grading drum screen and engaging with the rack 4. The two driven idlers 10 are arranged along the inclination direction of the other side inclined beam 5, that is, the virtual connection line of the two driven idlers 10 is in the inclination direction of the inclined beam 5, and also in the inclination direction of the grading drum screen. The two driven idlers 10 are respectively rotatably arranged on the two vertical supports 6 at the bottom of the inclined beam 5 on the side, that is, the driven idler 10 can be installed on the corresponding vertical support 6 through a rotating shaft, a bearing and the like. The two driven idlers 10 are respectively adapted to the guide rail 3 from the lower side of the guide rail 3 at the front and rear ends of the grading drum screen, that is, the two driven idlers 10 are also located below the side of the grading drum screen, cooperating with the two driving gears 9, supporting the grading drum screen from below the side of the grading drum screen and adapting to the guide rail 3. The guide rail 3 can adopt a circular strip structure adapted to the wheel groove of the driven idler 10. During work, the circular strip-shaped guide rail 3 is embedded in the wheel groove of the driven idler 10. The speed reducer motor 11 is connected with the two driving gears 9 through a transmission shaft 12.
[0042] After starting the speed reducer motor 11, the speed reducer motor 11 drives the two driving gears 9 to rotate synchronously through the transmission shaft 12, the rotating two driving gears 9 are engaged with the racks 4 at the front and rear ends of the grading drum screen, a tangential force is applied to the grading drum screen to generate a driving torque, so that the grading drum screen starts to rotate around the axis, while the grading drum screen is rotating, the two driven idlers 10 on the other side are matched with the guide rails 3 at the front and rear ends of the grading drum screen, the driven idlers 10 not only support part of the weight of the grading drum screen, but more importantly, limit the radial position of the grading drum screen, and ensure the stability of rotation.
[0043] The driving mechanism adopts the driving mode of the engagement of the driving gear 9 and the rack 4, the power transmission is stable and reliable, there is no risk of slipping, the constant speed of the grading drum screen is ensured, and therefore the stability of the screening effect is ensured, the speed reducer motor 11 drives the two driving gears 9 through the transmission shaft 12, the structure is compact, the synchronism is good, and the energy consumption is low, the cooperation of the driven idler 10 and the guide rail 3 provides stable support for the grading drum screen, reduces the running resistance, and the whole driving mechanism is efficient and stable, which provides core power support for reducing the damage rate of the Chinese jujube and improving the screening efficiency.
[0044] Further, as shown in Figure 4 The collecting mechanism adopts the downwardly inclined collecting plate 16, the collecting plate 16 under the small fruit screening area 1 and the medium fruit screening area 2 is connected with the inclined beam 5 on the side of the grading drum screen in the upward rotating direction through the flow guide plate 17 on the side of the grading drum screen in the upward rotating direction, and is inclined from the side of the grading drum screen in the upward rotating direction to the side of the grading drum screen in the downward rotating direction. That is, when the grading drum screen rotates clockwise, the flow guide plate 17 is located on the left side of the grading drum screen, the collecting plate 16 under the small fruit screening area 1 and the medium fruit screening area 2 is connected with the inclined beam 5 on the left side through the flow guide plate 17, and the collecting plate 16 is inclined downward from left to right, that is, the left side of the collecting plate 16 is connected with the bottom of the flow guide plate 17, and the right side is inclined downward; when the grading drum screen rotates counterclockwise, the flow guide plate 17 is located on the right side of the grading drum screen, the collecting plate 16 under the small fruit screening area 1 and the medium fruit screening area 2 is connected with the inclined beam 5 on the right side through the flow guide plate 17, and the collecting plate 16 is inclined downward from right to left, that is, the right side of the collecting plate 16 is connected with the bottom of the flow guide plate 17, and the left side is inclined downward, wherein the top of the flow guide plate 17 is connected with the inclined beam 5, the bottom is connected with the collecting plate 16, and is inclined to the direction of the grading drum screen.
[0045] The flow guide plate 17 of the present application is arranged on the side of the grading drum screen in the upward rotating direction, so that the Chinese jujube falling from the screen falls on the collecting plate 17 with the shortest distance and the smallest impact force, instead of directly falling from a high place, which greatly reduces the bruise damage of the Chinese jujube caused by falling, and at the same time, the collecting plate inclined from the side of the grading drum screen in the upward rotating direction to the side of the grading drum screen in the downward rotating direction guides the material by gravity, realizes the rapid and smooth collection of the material after screening, and improves the collection efficiency.
[0046] Further, a baffle plate 13 is vertically arranged between the vertical supports 6 on the front side of the two inclined beams 5, and is located below and adapted to the outlet of the middle fruit screening area 2 of the stepped drum screen. The material collecting plate 16 below the outlet of the middle fruit screening area 2 is connected to the bottom of the baffle plate 13 and is arranged downwardly inclined along the material conveying direction, which can accurately guide the large fruits that cannot pass through the screen holes of the middle fruit screening area 2 onto the material collecting plate 16 below.
[0047] Specifically, a receiving bag 15 for collecting sour jujubes is placed below the material collecting plate 16, the material collecting plate 16 is a plate structure provided with a baffle 16-3 on both sides, a reverse V-shaped flow distribution plate 16-1 is arranged at the middle position of the outlet of the material collecting plate 16, and a clamping frame 16-2 for fixing the receiving bag 15 is arranged on both sides of the flow distribution plate 16-1 of the material collecting plate 16. The baffle 16-3 on both sides of the material collecting plate 16 can effectively prevent the sour jujubes from falling out during sliding, ensuring that all materials enter the collecting area. The reverse V-shaped flow distribution plate 16-1 is designed to uniformly distribute the screened sour jujubes to both sides, realizing simultaneous loading into two receiving bags 15 and improving the packaging efficiency. The special clamping frame 16-2 design makes the installation and disassembly of the receiving bag 15 extremely convenient, further shortening the auxiliary operation time and improving the overall work efficiency.
[0048] As shown in detail in Figure 5 The clamping frame 16-2 includes a U-shaped frame 16-21, a pin shaft 16-22, a handle 16-23, a reset spring 16-24, and two clamping rods 16-25. The U-shaped frame 16-21 is a frame structure composed of a horizontal plate and two vertical plates. One end of the U-shaped frame 16-21 abuts against the flow distribution plate 16-1 of the material collecting plate 16, and the other end abuts against the baffle 16-3 on one side of the material collecting plate 16. That is, the vertical plate end on one side of the U-shaped frame 16-21 abuts against the flow distribution plate 16-1 of the material collecting plate 16, and the vertical plate end on the other side abuts against the baffle 16-3 on one side of the material collecting plate 16, thereby forming an enclosure, and materials can pass through the hollow part of the U-shaped frame 16-21 to enter the receiving bag 15. One end of the pin shaft 16-22 is sequentially rotated and penetrates through the two vertical plates of the U-shaped frame 16-21, and the other end is vertically and perpendicularly provided with the handle 16-23. The two clamping rods 16-25 are arranged side by side on the pin shaft 16-22 and located outside the horizontal plate of the U-shaped frame 16-21, and the two clamping rods 16-25 are at an acute angle with the handle 16-23, preferably less than 30°. The horizontal plate of the U-shaped frame 16-21 is provided with a groove 16-26 adapted to the two clamping rods 16-25 on the lower side, and the handle 16-23 is connected to the vertical plate of the U-shaped frame 16-21 on the same side through the reset spring 16-24.
[0049] In operation, the handle 16-23 is held and pulled away from the vertical plate of the U-shaped frame 16-21, the handle 16-23 rotates around the pin shaft 16-22 as the hinge, the reset spring 16-24 is stretched, and since the two clamping rods 16-25 are fixed at an acute angle with the handle 16-23, at this time, the two clamping rods 16-25 rotate away from the groove 16-26 on the horizontal plate of the U-shaped frame 16-21, at this time, the gap between the two clamping rods 16-25 and the horizontal plate of the U-shaped frame 16-21 is enlarged, the bag opening of the storage bag 15 is sleeved into the gap, the handle 16-23 is released, and the handle 16-23 is reset under the contraction of the reset spring 16-24, at this time, the two clamping rods 16-25 rotate to approach the horizontal plate of the U-shaped frame 16-21 and are embedded into the groove 16-26, so that the bag opening of the storage bag 15 is firmly clamped. The clamping frame 16-2 realizes quick clamping and releasing of the bag opening of the storage bag 15, and the operator can complete the fixing or replacement of the bag by operating the handle 16-23 with one hand, which is simple and labor-saving, significantly reduces the labor intensity, and greatly shortens the time for replacing the storage bag, ensures the continuity of the screening operation, and improves the overall production efficiency.
[0050] In order to facilitate the discharging, the inclined beam 5 is provided with a downward inclined discharging hopper 14 on the rear side of the horizontal beam 8, which is matched with the inlet of the small fruit screening area 1 of the grading drum screen, can guide the to-be-screened jujube to the grading drum screen in a concentrated and uniform manner, avoids the blocking or accumulation of the material at the inlet, ensures the continuity and smoothness of the feeding, and simultaneously, the inclined discharging hopper 14 enables the jujube to enter the screen cylinder of the grading drum screen in a gentle manner, reduces the impact damage caused by direct pouring.
[0051] Embodiment 2
[0052] As shown in Figure 6 , the grading jujube screening device provided in the embodiment is different from the grading jujube screening device provided in the embodiment 1 in that:
[0053] In order to increase the effective screening area, improve the passing efficiency of the small fruit, and reduce the blocking, the screen hole of the small fruit screening area 1 is in a strip shape, and the length direction of the strip-shaped screen hole is arranged in parallel with the axial direction of the grading drum screen.
[0054] Embodiment 3
[0055] As shown in Figure 7 , the grading jujube screening device provided in the embodiment is different from the grading jujube screening device provided in the embodiment 1 in that:
[0056] In order to guide the jujube to pass through at a specific angle, further improve the screening speed and smoothness, ensure the screening accuracy, and improve the overall efficiency, the screen hole of the small fruit screening area 1 is in a strip shape, the length direction of the strip screen hole is arranged obliquely intersecting with the axial direction of the grading drum screen, preferably, the included angle between the length direction of the strip screen hole and the axial direction of the grading drum screen is an acute angle, and fruit damage caused by blockage and forced passing is effectively avoided.
[0057] The grading jujube screening equipment can balance the two core targets of improving the screening efficiency and reducing the jujube damage rate through a series of cooperative work such as inclined gravity conveying, stable rotary screening, accurate guiding and supporting, lossless buffer collection and convenient and rapid packaging. Meanwhile, the mobility and flexibility of the screen hole design make it have wide adaptability and practical value.
[0058] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, the features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.
Claims
1. A grading jujube screening device, characterized in that: The system includes a movable support that is inclined downward along the material conveying direction and equipped with a drive mechanism, and a grading drum screen located on the movable support and controlled to rotate by the drive mechanism. The grading drum screen includes a small fruit screening area (1) and a medium fruit screening area (2) arranged sequentially along the material conveying direction. The small fruit screening area (1) and the medium fruit screening area (2) are respectively provided with downwardly inclined collection mechanisms below the small fruit screening area (1) and the medium fruit screening area (2) and below the outlet of the medium fruit screening area (2). When the jujubes to be screened enter the inlet of the small fruit screening area (1) of the grading drum screen, the grading drum screen can rotate in the inclined direction of the movable support under the control of the drive mechanism to screen small, medium and large fruits and collect them by the corresponding collection mechanisms.
2. The graded jujube screening device according to claim 1, characterized in that: The small fruit screening area (1) and the medium fruit screening area (2) are respectively circumferentially distributed with sieve holes adapted to the size of small and medium fruits. The sieve holes in the medium fruit screening area (2) are circular or elliptical, and the sieve holes in the small fruit screening area (1) are circular, elliptical or strip-shaped. The length direction of the strip-shaped sieve holes is parallel to the axial direction of the grading drum screen or inclined to intersect the axial direction of the grading drum screen.
3. The graded jujube screening device according to claim 2, characterized in that: The grading drum screen is provided with linear guide components adapted to the drive mechanism at both ends of the front and rear. The small fruit screening area (1) and the medium fruit screening area (2) are located between the two linear guide components in sequence along the material conveying direction.
4. The graded jujube screening device according to claim 3, characterized in that: The movable support includes inclined beams (5) symmetrically arranged on the left and right sides of the grading drum screen along the material conveying direction, vertical supports (6) corresponding to the bottom of the inclined beams (5) at the front and rear, and rollers (7) arranged at the bottom of the vertical supports (6). A crossbeam (8) is connected between the vertical supports (6) on the rear side of the two inclined beams (5), and the crossbeam (8) is located below the entrance of the small fruit screening area (1) of the grading drum screen.
5. A graded jujube screening device according to claim 4, characterized in that: The material collection mechanism adopts a downwardly inclined material collection plate (16). The material collection plates (16) below the small fruit screening area (1) and the medium fruit screening area (2) are respectively connected to the inclined beam (5) on the side of the grading drum screen through the guide plate (17) located on the side of the upward rotation direction of the grading drum screen, and are inclined from the side of the grading drum screen in the upward rotation direction to the side of its downward rotation direction.
6. The graded jujube screening device according to claim 5, characterized in that: A baffle (13) is vertically arranged between the vertical supports (6) on the front side of the two inclined beams (5), and the baffle (13) is located below and adapted to the outlet of the medium fruit screening area (2) of the grading drum screen; the collecting plate (16) below the outlet of the medium fruit screening area (2) is connected to the bottom of the baffle (13) and is inclined downward along the material conveying direction.
7. A graded jujube screening device according to claim 6, characterized in that: A storage bag (15) is placed below the collection plate (16). The collection plate (16) is a plate-shaped structure with baffles (16-3) on both sides. An inverted V-shaped diversion plate (16-1) is provided in the middle of the outlet of the collection plate (16), and clamping frames (16-2) for fixing the storage bag (15) are provided on both sides of the diversion plate (16-1) of the collection plate (16).
8. A graded jujube screening device according to claim 7, characterized in that: The clamping frame (16-2) includes a U-shaped frame (16-21) with one end abutting against the diverter plate (16-1) and the other end abutting against a side baffle (16-3), a pin (16-22) with a handle (16-23) vertically arranged at the other end and two vertical plates that rotate sequentially through the U-shaped frame (16-21) on one end, and two clamping rods (16-25) arranged side by side on the pin (16-22) at an acute angle to the handle (16-23) on the outside of the horizontal plate of the U-shaped frame (16-21). The lower side of the horizontal plate of the U-shaped frame (16-21) is provided with a groove (16-26) adapted to the two clamping rods (16-25). The handle (16-23) is connected to the vertical plate of the U-shaped frame (16-21) on the same side by a return spring (16-24).
9. A grading jujube screening device according to any one of claims 4-8, characterized in that: The linear guide component includes a guide rail (3) and a rack (4) arranged circumferentially along the outer wall of the grading drum screen; the drive mechanism includes two drive gears (9), two driven rollers (10) and a geared motor (11). The two drive gears (9) are rotatably mounted on two vertical supports (6) at the bottom of one side inclined beam (5) and are meshed with the rack (4) at the front and rear ends of the grading drum screen from below. The two driven rollers (10) are rotatably mounted on two vertical supports (6) at the bottom of the other side inclined beam (5) and are adapted to the guide rails (3) at the front and rear ends of the grading drum screen from below. The geared motor (11) is connected to the two drive gears (9) through a transmission shaft (12).
10. A grading jujube screening device according to any one of claims 4-8, characterized in that: The two inclined beams (5) are provided with a downwardly inclined hopper (14) on the crossbeam (8) on the rear side, which is adapted to the inlet of the small fruit screening area (1) of the grading drum screen.