Impurity screening device

Abstract

The utility model discloses an impurity screening device which is characterized in that a high-pressure fan is used for blowing air and is matched with a lifting structure to repeatedly enable internal rice to quickly rise and fall back so as to realize a vibration effect, so that the rice is blown in the process of being thrown in an air screening box, and impurities mixed in the rice are smoothly removed; and in the process, the air screen box continuously rotates under the action of the stepping motor, the comprehensiveness of the air screen is improved, the good screening effect is achieved, and the screened rice is recycled through the material leakage structure after screening is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of rice processing, in particular to an impurity screening device. Background Art

[0002] Rice is an agricultural product obtained by husking rice and playing an important role in daily life as the main source of food.

[0003] During the rice processing, the hulling process is currently mostly carried out by mechanical equipment, which will not only cause some intact rice grains to be crushed to produce broken rice grains, but also leave some impurities such as rice bran and dust that need to be screened out. The current simple air blowing screening method is not comprehensive enough, and some impurities will still remain after screening, resulting in unsatisfactory results. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model discloses an impurity screening device, the technical scheme adopted is, including a bottom frame, a through arc groove, a material discharging part, a front opening, a shield, a high-pressure fan, an electrical box, a stepping motor, a conical bottom plate, a fixed connecting shaft, an air screen box, a filter hole, a bottom through hole, a bottom channel, a lifting structure and a material leakage structure. A through arc groove is opened on the bottom frame, through which a material discharging part is arranged, and the material discharging part is communicated with the front opening opened on the front side of the bottom frame. The shield is buckled and placed on the upper surface of the bottom frame, and the inner flange part of the lower end thereof contacts the outer wall of the air screen box. An electrical box is arranged on the shield, and a high-pressure fan is installed on the side. During screening, the high-pressure fan is powered by the electrical box and controlled to start, and blows strong wind toward the air screen box. A stepping motor is installed at the inner center of the bottom frame, and the output end of the stepping motor is fixedly installed with the conical bottom plate. The center is high and the periphery is low. Under the action of the stepper motor, the conical bottom plate can be driven to rotate. A vertical fixed connecting shaft is integrally formed on the conical bottom plate, which is fixedly connected to the wind screen box through it. Under the action of the fixed connecting shaft, the wind screen box is driven to rotate, which enables the high-pressure fan to blow air at different positions of the wind screen box. Several filter holes are distributed on the side wall of the wind screen box. A through window can be set on the right side of the shield to help discharge impurities directly to the outside of the shield. A bottom through hole is opened at the center of the wind screen box, which is connected to the bottom channel set under the wind screen box. A lifting structure is set in the wind screen box. The role of the lifting mechanism is to repeatedly push the rice in the wind screen box up and then drop it, which has the effect of scattering the rice and helps to sieve out impurities. The lifting structure has a leakage structure, and a feeding port is opened on the front side of the top surface of the wind screen box for adding rice. This feeding port can be closed by a detachable sealing plug.

[0005] As a preferred technical solution of the utility model, the discharging part includes a pushing button, a connecting shaft, a scraper and an annular trough. An annular trough is arranged near the inner wall of the bottom frame, and a scraper is placed in the annular trough. The lower surface of the pushing button is fixedly connected to the scraper through a connecting shaft, and the connecting shaft passes through the arc groove. After the screening process is completed, the pushing button is manually pushed to move the scraper along the annular trough to push the rice fallen therein to the front opening for easy collection.

[0006] As a preferred technical solution of the utility model, the lifting structure includes a lifting plate and a lifting electric push rod. A through hole is opened at the bottom of the wind screen box, and a lifting electric push rod is vertically fixed on the conical bottom plate. The output shaft of the lifting electric push rod passes through the through hole and extends into the wind screen box. The lifting plate is fixed at the end of its output end, and the side wall of the lifting plate is in contact with the inner wall of the wind screen box.

[0007] As a preferred technical solution of the utility model, the upper surface of the lifting plate is in an inverted cone shape, with the outer side being high and the center being low.

[0008] As an optimal technical solution of the utility model, the leakage structure includes a central leakage hole, a plug, a wing plate, a spring and a top cone. The central leakage hole is opened at the center of the lifting plate, and the plug is used to seal the central leakage hole. The left and right sides of the lower end thereof are integrally formed with wing plates. The upper surface of the wing plate is connected to the lower surface of the lifting plate through a spring. The top cone is fixed at the center of the top surface inside the wind screen box. The plug and the top cone are both made of rigid materials. When the screening is completed and the material needs to be discharged, the lifting electric push rod is started to push the lifting plate up all the time so that the top cone pushes the plug down, squeezing the spring so that the plug leaves the air guide closing position for the central leakage hole. The rice all leaks out from the central leakage hole under the guidance of the inclined surface of the conical lifting plate.

[0009] The beneficial effects of the utility model are as follows: air is blown by a high-pressure fan in cooperation with a lifting structure to repeatedly make the internal rice rise and fall quickly to achieve a shaking effect, so that the rice is blown during the process of being thrown inside the wind screen box, and impurities mixed inside are successfully removed. During this process, the wind screen box continuously rotates under the action of a stepper motor, thereby improving the comprehensiveness of the wind screen and having a good screening effect. After the screening is completed, the screened rice is recovered through the leakage structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0012] Figure 3 It is a schematic diagram of the cross-sectional structure of some components of the utility model.

[0013] In the figure: bottom frame 1, through arc groove 2, push button 3, connecting shaft 31, scraper 32, annular material trough 33, front opening 4, shield 5, high-pressure fan 6, electrical box 7, stepper motor 8, conical bottom plate 9, fixed connecting shaft 10, wind screen box 11, filter hole 12, bottom through hole 13, bottom channel 131, lifting plate 14, lifting electric push rod 15, middle leakage hole 16, plug 17, wing plate 18, spring 19, top cone 20. DETAILED DESCRIPTION

[0014] Example 1

[0015] like Figures 1 to 3 As shown, the utility model discloses an impurity screening device, and the technical scheme adopted is that it includes a bottom frame 1, a through arc groove 2, a discharging part, a front opening 4, a shield 5, a high-pressure fan 6, an electrical box 7, a stepping motor 8, a conical bottom plate 9, a fixed connecting shaft 10, a wind screen box 11, a filter hole 12, a bottom through hole 13, a bottom channel 131, a lifting structure and a leakage structure. A through arc groove 2 is opened on the bottom frame 1, and a discharging part is arranged therethrough. The discharging part is communicated with the front opening 4 opened on the front side of the bottom frame 1. The shield 5 is buckled on the upper surface of the bottom frame 1, and the inner flange part of the lower end thereof is connected with the wind screen box 11. The outer wall is in contact, an electrical box 7 is arranged on the protective cover 5, a high-pressure fan 6 is installed on the side, a stepper motor 8 is installed at the center of the bottom frame 1, and a conical bottom plate 9 is fixedly installed on the output end of the stepper motor 8. The center of the conical bottom plate 9 is high and the periphery is low. A vertical fixed connecting shaft 10 is integrally formed on the conical bottom plate 9, which is fixedly connected to the wind screen box 11 through the vertical fixed connecting shaft 10. A plurality of filter holes 12 are distributed on the side wall of the wind screen box 11. A bottom through hole 13 is opened at the center of the wind screen box 11, which is connected to the bottom channel 131 arranged below the wind screen box 11. A lifting structure is arranged in the wind screen box 11, and a leakage structure is provided on the lifting structure.

[0016] As a preferred technical solution of the utility model, the discharge part is that an annular material groove 33 is arranged inside the inner wall of the bottom frame 1, a scraper 32 is placed in the annular material groove 33, and the lower surface of the push button 3 is fixedly connected to the scraper 32 through a connecting shaft 31, and the connecting shaft 31 passes through the arc groove 2.

[0017] As a preferred technical solution of the utility model, a lifting structure is provided to make the rice in the wind screen box fly continuously, which specifically includes a lifting plate 14 and a lifting electric push rod 15. A through hole is opened at the bottom of the wind screen box 11, and a lifting electric push rod 15 is vertically fixed on the conical bottom plate 9. The output shaft of the lifting electric push rod 15 passes through the through hole and extends into the wind screen box 11. The lifting plate 14 is fixed at the end of the output end, and the side wall of the lifting plate 14 is in contact with the inner wall of the wind screen box 11.

[0018] As a preferred technical solution of the utility model, the upper surface of the lifting plate 14 is in an inverted cone shape, with the outer side higher and the center lower.

[0019] As a preferred technical solution of the utility model, the leakage structure includes a central leakage hole 16, a plug 17, a wing plate 18, a spring 19 and a top cone 20. The central leakage hole 16 is opened at the center of the lifting plate 14, and the plug 17 closes the central leakage hole 16. The wing plates 18 are integrally formed on the left and right sides of the lower end. The upper surface of the wing plate 18 is connected to the lower surface of the lifting plate 14 through the spring 19. The top cone 20 is fixed at the center of the top surface inside the wind screen box 11. The plug 17 and the top cone 20 are both made of rigid materials.

[0020] The working principle of the utility model is as follows: when in use, rice is added from the feeding port on the top front side of the wind screen box 11, the feeding port is closed, and then the protective cover 5 is covered, the high-pressure fan 6, the stepper motor 8 and the lifting electric push rod 15 are started, and the starting of the lifting electric push rod 15 is a rapid retraction process, which can realize the throwing of the rice placed on the lifting plate 14, and the rice bran, broken rice grains and dust are removed by coordinating the rotation of the wind screen box 11 and the blowing of the high-pressure fan. After the screening is completed, When it is necessary to discharge the material, the electric push rod 15 is controlled to be lifted to the position where the top cone 20 squeezes the seal 17 so that the seal 17 is squeezed away from the sealing position of the middle leakage hole 16. At this time, the rice leaks from here and passes through the bottom through hole 13 and the bottom channel 131, and finally falls into the annular trough 33 under the action of the conical bottom plate 9. The push button 3 is manually moved along the through arc groove 2 to drive the scraper 32 to move along the annular trough 33 to push the rice to the front opening for easy removal.

[0021] Components not described in detail herein are prior art.

[0022] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. An impurity screening device, characterized in that: The invention comprises a bottom frame (1), a through arc groove (2), a discharge portion, a front opening (4), a protective cover (5), a high-pressure fan (6), an electrical box (7), a stepping motor (8), a conical bottom plate (9), a fixed connecting shaft (10), a wind screen box (11), a filter hole (12), a bottom through hole (13), a bottom channel (131), a lifting structure and a material leakage structure; the bottom frame (1) is provided with a through arc groove (2), through which a discharge portion is arranged, and the discharge portion is connected with the front opening (4) opened on the front side of the bottom frame (1); the protective cover (5) is buckled on the upper surface of the bottom frame (1), and the inner flange part of the lower end thereof contacts the outer wall of the wind screen box (11); the protective cover (5) is provided with an electrical box (12), and the inner flange part of the lower end thereof contacts the outer wall of the wind screen box (11); the protective cover (5) is provided with an electrical box (13). An air box (7) is provided with a high-pressure fan (6) on the side; a stepper motor (8) is installed at the center of the bottom frame (1), and a conical bottom plate (9) is fixedly installed at the output end of the stepper motor (8), wherein the center of the conical bottom plate (9) is high and the periphery is low; a vertical fixed connecting shaft (10) is integrally formed on the conical bottom plate (9), and is fixedly connected to the wind screen box (11) through the vertical fixed connecting shaft (10); a plurality of filter holes (12) are distributed on the side wall of the wind screen box (11); a bottom through hole (13) is opened at the center of the wind screen box (11), and is connected to a bottom channel (131) arranged below the wind screen box (11); a lifting structure is arranged inside the wind screen box (11), and a material leakage structure is arranged on the lifting structure.

2. An impurity screening device according to claim 1, characterized in that: The discharge portion comprises a push button (3), a connecting shaft (31), a scraper (32) and an annular material groove (33); an annular material groove (33) is arranged inside the bottom frame (1) near the inner wall; a scraper (32) is placed in the annular material groove (33); the lower surface of the push button (3) is fixedly connected to the scraper (32) via the connecting shaft (31); the connecting shaft (31) passes through the through-arc groove (2).

3. The impurity screening device according to claim 1, characterized in that: The lifting structure includes a lifting plate (14) and a lifting electric push rod (15); a through hole is opened at the bottom of the wind screen box (11), and a lifting electric push rod (15) is vertically fixed on the conical bottom plate (9); the output shaft of the lifting electric push rod (15) passes through the through hole and extends into the wind screen box (11) and the lifting plate (14) is fixed at the end of its output end; the side wall of the lifting plate (14) is in contact with the inner wall of the wind screen box (11).

4. An impurity screening device according to claim 3, characterized in that: The upper surface of the lifting plate (14) is in the form of an inverted cone, with the outer side being higher and the center being lower.

5. The impurity screening device according to claim 3, characterized in that: The leakage structure includes a central leakage hole (16), a plug (17), a wing plate (18), a spring (19) and a top cone (20); a central leakage hole (16) is opened at the center of the lifting plate (14); the plug (17) seals the central leakage hole (16), and the wing plates (18) are integrally formed on the left and right sides of the lower end; the upper surface of the wing plate (18) is connected to the lower surface of the lifting plate (14) through a spring (19); and the top cone (20) is fixed at the center of the internal top surface of the wind screen box (11).

6. The impurity screening device according to claim 5, characterized in that: The sealing plug (17) and the top cone (20) are both made of rigid materials.

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