Efficient screening structure for food processing impurity removal
By using a composite separation mechanism and a dynamic unloading structure, the problem of existing nut screening equipment being unable to remove light and heavy impurities simultaneously has been solved, achieving efficient and low-energy nut screening and improving the separation accuracy and stability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI RUNWU FOOD CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-24
AI Technical Summary
Existing nut sorting equipment cannot remove light and heavy impurities simultaneously. Traditional equipment has a single separation mechanism, resulting in low sorting efficiency and high energy consumption, which cannot meet the needs of modern large-scale production.
The system employs a composite separation mechanism, combining a centrifugal force-driven stone separation mechanism with an airflow guiding system. It separates nuts from high-density impurities such as stones and shell fragments through a funnel sieve with a gradient aperture design. It also utilizes a dynamic unloading structure to automatically discharge heavy objects and combines a polyurethane rubber baffle assembly to sort small and light foreign objects.
It achieves simultaneous and efficient separation of nuts from light and heavy impurities, improves screening thoroughness and separation accuracy, reduces energy consumption and extends equipment life, and reduces material residue and maintenance costs.
Smart Images
Figure CN224157024U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food processing technology, and in particular to a high-efficiency screening structure for removing impurities in food processing. Background Technology
[0002] In the food processing industry, the pretreatment of nut raw materials requires the simultaneous separation of high-density impurities and small foreign objects. Nut screening places stringent requirements on equipment, which must avoid material damage and ensure the impurity removal rate. Traditional screening processes are difficult to meet the needs of modern large-scale production. As consumers' requirements for food safety increase, the control of impurity residues has become a focus of industry attention.
[0003] Existing nut screening equipment mostly adopts a single separation technology; some equipment achieves size separation through screen grading but cannot remove impurities with density differences; air classifiers can separate light and small foreign objects but are ineffective for heavy objects such as stones; centrifugal separation equipment relies on speed control to achieve density grading but is prone to material damage; composite screening equipment improves efficiency through multi-stage combination but has defects such as high energy consumption and complex structure.
[0004] Traditional screening equipment cannot remove light and heavy impurities simultaneously due to its single separation mechanism. Centrifugal separation equipment relies solely on speed differences, resulting in low efficiency in separating stones from small foreign objects. Air classifiers cannot handle high-density impurities, and screen grading equipment fails to separate materials of similar size but different densities, thus making it impossible to complete the screening work efficiently. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a high-efficiency screening structure for removing impurities in food processing, which can effectively solve the problems mentioned in the background technology.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] This utility model provides a high-efficiency screening structure for removing impurities in food processing, including...
[0008] The outer cylinder is rotatably connected to the inside of the outer cylinder. The side wall of the sieve cylinder is provided with several funnel-shaped sieve holes in a linear array, and the bottom of the sieve cylinder is provided with a conical bottom surface.
[0009] Several rubber rods are fixedly installed in a circular arrangement on the upper surface of the cone bottom, and several stone separation mechanisms are set at the junction of the side wall of the sieve cylinder and the cone bottom.
[0010] The stone separation mechanism includes guide arc plates, and baffle groups are arranged alternately between the guide arc plates. A discharge gate is provided on the side wall of the screen cylinder behind the baffle group.
[0011] A discharge spring is installed on the rear side of the discharge gate, and the discharge spring is fixedly installed on the outer wall of the screen cylinder.
[0012] Furthermore, a hollow air hole is provided in the middle of the rubber rod, which leads downward to the lower side of the cone bottom surface, and a lower air guide plate is provided at the lower opening of the hollow air hole.
[0013] Furthermore, the diameter of the funnel sieve hole gradually decreases from the inside to the outside, the funnel sieve hole is connected to the outside of the sieve cylinder, and an air hole is opened on the lower side of the sieve cylinder, which is connected to the lower side of the cone bottom surface.
[0014] Furthermore, a power motor is installed at the lower end of the screen cylinder, and the output end of the power motor is fixedly connected to the lower surface of the screen cylinder.
[0015] Furthermore, a debris recovery bin is located between the outer cylinder and the screen cylinder, and a cleaning door is provided on the lower side of the debris recovery bin. A cylinder cover with an inner diameter equal to that of the screen cylinder is provided on the top of the outer cylinder.
[0016] Furthermore, the baffles of the baffle assembly are staggered on both sides and are made of polyurethane rubber.
[0017] The beneficial effects of this utility model are:
[0018] 1. This utility model is equipped with a composite separation mechanism. Through the coordinated action of the centrifugal force-driven stone separation mechanism and the airflow guiding system, it simultaneously achieves the separation of nuts from high-density impurities such as stones and broken shells, as well as the airflow sorting of light and small foreign objects. This solves the problem that traditional equipment cannot handle light and heavy impurities at the same time. At the same time, the funnel screen hole adopts a gradient aperture design, which gradually decreases from the inside to the outside, and can intercept nuts of different particle sizes, realizing the dual screening function of size grading and density separation. When the rotation stops, the nuts stuck in the screen hole fall back to the screen cylinder due to gravity and participate in the separation again, improving the thoroughness of screening and reducing material residue.
[0019] 2. This utility model is equipped with a dynamic unloading structure. When the stones accumulate to a preset weight, the unloading gate is automatically triggered to discharge them, avoiding manual intervention. The sloping design of the conical bottom, combined with centrifugal force, allows heavy objects such as stones to slide along the side wall of the screen cylinder towards the unloading port, reducing the probability of mixing with nuts and improving separation accuracy. The polyurethane rubber baffle assembly ensures wear resistance while having elastic deformation capability, reducing the risk of material blockage, extending the service life of the equipment, reducing maintenance costs, ensuring the stability of continuous operation, and also reducing energy consumption. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0021] Figure 1This is a schematic diagram of the efficient screening structure for removing impurities in food processing according to this utility model.
[0022] Figure 2 This is a front cross-sectional view of the efficient screening structure for removing impurities in food processing according to this utility model.
[0023] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.
[0024] Figure 4 This is a top view cross-sectional structural diagram of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Outer cylinder; 11. Cleaning door; 12. Cylinder cover; 13. Waste recovery bin; 2. Screen cylinder; 21. Funnel screen hole; 22. Conical bottom surface; 221. Rubber rod; 2211. Hollow air hole; 2212. Lower air guide plate; 23. Air hole; 24. Stone separation mechanism; 241. Guide arc plate; 242. Baffle assembly; 243. Unloading door; 244. Unloading spring; 3. Power motor. Detailed Implementation
[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0028] Example 1
[0029] Reference Figure 1-3 This is the first embodiment of the present invention, which provides a high-efficiency screening structure for removing impurities in food processing. It includes an outer cylinder 1, and a sieve cylinder 2 is rotatably connected inside the outer cylinder 1. The side wall of the sieve cylinder 2 is provided with a plurality of funnel sieve holes 21 arranged in a linear array. The diameter of the funnel sieve holes 21 gradually decreases from the inside to the outside to achieve grading and screening of nuts of different particle sizes. The bottom of the sieve cylinder 2 is provided with a conical bottom surface 22. Its inclined design, combined with centrifugal force, guides the stones to slide towards the discharge port. A plurality of rubber rods 221 are fixedly installed in a circular arrangement on the upper surface of the conical bottom surface 22 for turning the material and forming an airflow channel. A plurality of stone separation mechanisms 24 are provided at the junction of the side wall of the sieve cylinder 2 and the conical bottom surface 22. The stone separation mechanism 24 includes a guide arc plate 241. The guide arc plates 241 are arranged in pairs for guiding the material to the baffle group 242.
[0030] Baffle groups 242 are staggered between the guide arc plates 241. The baffle groups 242 are made of polyurethane rubber, which is elastic, wear-resistant and has controllable gaps. The gap width is smaller than the minimum diameter of the nut but larger than the maximum diameter of the stone. Combined with centrifugal force, the nuts and stones are separated in a directional manner: the nuts are too light to push open the elastic baffles, while the stones can overcome the elastic force of the baffles and squeeze through the gaps to be discharged under the drive of centrifugal force. A discharge gate 243 is provided on the side wall of the screen cylinder 2 behind the baffle group 242 for automatically discharging the accumulated stones. A discharge spring 244 is installed on the rear side of the discharge gate 243. The discharge spring 244 has a preset elasticity threshold to control the discharge trigger weight. It is fixedly installed on the outer wall of the screen cylinder 2.
[0031] The rubber rod 221 has a hollow air hole 2211 in the middle, which provides a channel for airflow. During the rotation of the screen cylinder 2, air can flow upward through this air hole, providing power for blowing light debris. The hollow air hole 2211 leads downward to the lower side of the cone bottom surface 22. This design allows the air below the cone bottom surface 22 to smoothly enter the hollow air hole 2211 when the screen cylinder 2 rotates, ensuring a sufficient air source to form an airflow.
[0032] A lower air guide plate 2212 is provided at the lower opening of the hollow air hole 2211. The lower air guide plate 2212 rotates with the screen cylinder 2 when it rotates. Due to its special shape and structure, it can play a role in catching the air when rotating, collecting more air into the hollow air hole 2211, thereby increasing the air volume. In addition, the rubber rod 221 will swing irregularly when working, which makes the direction of the air blown out through the hollow air hole 2211 irregular, thereby increasing the effect of blowing up light debris. It can more effectively blow up light debris such as ash and branches and leaves and discharge them through the funnel screen hole 21.
[0033] The diameter of the funnel sieve hole 21 gradually decreases from the inside to the outside. This design allows for effective screening based on the size of the nuts, enabling smaller, lighter impurities to pass through the sieve hole while the nuts are intercepted inside the sieve cylinder 2 for further separation. The funnel sieve hole 21 is connected to the outside of the sieve cylinder 2, facilitating the discharge of the screened light impurities outside the sieve cylinder 2 and achieving the separation of impurities from nuts. An air hole 23 is provided on the lower side of the sieve cylinder 2, which is connected to the lower side of the conical bottom surface 22. When the sieve cylinder 2 rotates, air can enter from the lower side of the conical bottom surface 22 through the air hole 23 to balance the air pressure, which is more conducive to the discharge of light impurities through the funnel sieve hole 21.
[0034] Example 2
[0035] Reference Figure 1-4This is the second embodiment of the present invention, which differs from the first embodiment in that:
[0036] A power motor 3 is installed at the lower end of the screen cylinder 2. The output end of the power motor 3 is fixedly connected to the lower surface of the screen cylinder 2. The power motor 3 adopts a variable frequency speed regulation design and provides stable rotation power to the screen cylinder 2 through direct drive to ensure the rotation conditions required for centrifugal force and airflow separation. The fixed connection structure adopts a combination of flange and high-strength bolts, which can withstand the torque and vibration load generated when the screen cylinder 2 rotates, ensuring long-term stable operation of the equipment.
[0037] The outer cylinder 1 and the screen cylinder 2 are surrounded by a debris collection bin 13. The debris collection bin 13 is used to collect various debris, such as stones and light impurities, screened out from the screen cylinder 2. The debris collection bin 13 is provided with a cleaning door 11 on the lower side. The cleaning door 11 is convenient for staff to open regularly to clean the debris accumulated in the debris collection bin 13, ensuring that the debris collection bin 13 can continue to effectively collect debris. The outer cylinder 1 is provided with a cylinder cover 12 with an inner diameter equal to that of the screen cylinder 2. The cylinder cover 12 can prevent debris from splashing out of the equipment during the screening process, and also helps to maintain a stable airflow environment inside the equipment, ensuring the normal operation of the screening work.
[0038] The baffles of the baffle assembly 242 are staggered on both sides to form a dynamic gap to intercept nuts and guide stones to move toward the discharge gate 243. The material is polyurethane rubber, which has both elasticity and wear resistance, ensuring that the stones can be squeezed out of the baffles and discharged under the action of centrifugal force, while the nuts are intercepted, achieving efficient separation.
[0039] The remaining structure is the same as that in Example 1.
[0040] The specific operating principle of this utility model is as follows:
[0041] First, when the equipment is started, the power motor 3 drives the screen cylinder 2 to rotate at high speed. The material to be screened is put into the screen cylinder 2 from the cylinder cover 12 above the outer cylinder 1. The height of the material when it is put in must be strictly controlled to be lower than the position of the baffle group 242 where the side wall of the screen cylinder 2 meets the bottom surface 22 of the cone, so as to avoid direct impact on the baffle group 242. After the material enters the screen cylinder 2, it diffuses to the edge under the action of centrifugal force. The funnel screen hole 21 on the side wall of the screen cylinder 2 is designed with a gradient aperture to intercept nuts of different particle sizes. Smaller light impurities begin to try to be discharged through the funnel screen hole 21 under the action of centrifugal force and airflow.
[0042] Secondly, when high-density stones are thrown to the stone separation mechanism 24 at the junction of the conical bottom surface 22 and the side wall at the bottom of the screen cylinder 2 under the action of centrifugal force, the guide arc plate 241 guides the stones into the gap of the baffle group 242. The gap of the polyurethane rubber baffle group 242 is smaller than the minimum diameter of the nut but larger than the maximum diameter of the stone. The centrifugal force drives the stones to squeeze open the baffle group 242 and trigger the discharge gate 243. The stones slide down the slope of the side wall of the screen cylinder 2 to the debris recovery bin 13. At the same time, the rubber rod 221 on the conical bottom surface 22 picks up air through the lower air guide plate 2212 as it rotates. The air is accelerated through the hollow air hole 2211 to form an upward airflow. The irregular swing of the rubber rod 221 causes the airflow direction to change randomly, blowing up small impurities and discharging them through the funnel screen hole 21 to the debris recovery bin 13.
[0043] Finally, when the equipment stops, the sieve cylinder 2 stops rotating, and the nuts stuck in the sieve holes fall back to the sieve cylinder 2 due to gravity. The debris collection bin 13 collects stones and light impurities, which can be cleaned periodically by the cleaning door 11. Nuts that do not pass through the funnel sieve holes 21 slide back to the bottom of the sieve cylinder 2 along the slope of the conical bottom surface 22 and continue to participate in centrifugal separation. When the equipment stops, the sieve cylinder 2 stops rotating, and the nuts stuck in the sieve holes fall back to the sieve cylinder 2 due to gravity. They will be separated again when the equipment is restarted. The cylinder cover 12 on the top of the outer cylinder 1 cooperates with the debris collection bin 13 to prevent impurities from overflowing. The cleaning door 11 is located on the lower side of the debris collection bin 13, which facilitates the periodic cleaning of accumulated impurities. Throughout the process, the rotation of the sieve cylinder 2, the airflow guiding system and the mechanical structure work together to achieve efficient grading of nuts and removal of impurities.
[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A high-efficiency screening structure for removing impurities in food processing, characterized in that: include The outer cylinder has a sieve cylinder rotatably connected inside it. The side wall of the sieve cylinder is provided with a number of funnel-shaped sieve holes in a linear array, and the bottom of the sieve cylinder is provided with a conical bottom surface. Several rubber rods are fixedly installed in a circular arrangement on the upper surface of the cone bottom, and several stone separation mechanisms are provided at the junction of the side wall of the sieve cylinder and the cone bottom. The stone separation mechanism includes guide arc plates, and baffle groups are arranged alternately between the guide arc plates. A discharge gate is provided on the side wall of the screen cylinder behind the baffle group. A discharge spring is installed on the rear side of the discharge gate, and the discharge spring is fixedly installed on the outer wall of the screen cylinder.
2. The high-efficiency screening structure for removing impurities in food processing according to claim 1, characterized in that... The rubber rod has a hollow air hole in the middle, which leads downward to the lower side of the cone bottom surface. A lower air guide plate is provided at the lower opening of the hollow air hole.
3. The high-efficiency screening structure for removing impurities in food processing according to claim 1, characterized in that... The diameter of the funnel sieve hole gradually decreases from the inside to the outside. The funnel sieve hole is connected to the outside of the sieve cylinder. An air hole is opened on the lower side of the sieve cylinder and is connected to the lower side of the bottom surface of the cone.
4. The high-efficiency screening structure for removing impurities in food processing according to claim 1, characterized in that... A power motor is installed at the lower end of the screen cylinder, and the output end of the power motor is fixedly connected to the lower surface of the screen cylinder.
5. The high-efficiency screening structure for removing impurities in food processing according to claim 1, characterized in that... The outer cylinder and the screen cylinder are surrounded by a debris collection bin, and a cleaning door is provided on the lower side of the debris collection bin. The outer cylinder is provided with a cylinder cover with an inner diameter equal to that of the screen cylinder.
6. The high-efficiency screening structure for removing impurities in food processing according to claim 1, characterized in that... The baffles of the baffle assembly are arranged alternately on both sides, and the baffles are made of polyurethane rubber.