Double-roller spin vibration screen with anti-blocking function

Abstract

The invention discloses a double-roller spin vibration screen with an anti-blocking function, and relates to the technical field of grain screening, the double-roller spin vibration screen comprises a support, a flow dividing channel is cooperatively installed on the upper side of the support, a feeding bin is cooperatively installed on the upper side of the flow dividing channel, and a first screening box and a second screening box are cooperatively installed on the support; a screening plate is cooperatively installed in the second screening box, a roller frame is rotatably and cooperatively installed in the first screening box, a first rotary screening part is cooperatively installed on the roller frame, the first rotary screening part comprises a first screening cylinder, a first fixing plate and a second fixing plate, the first screening cylinder is cooperatively installed on the roller frame, and the second screening cylinder is cooperatively installed on the roller frame. And a plurality of first through holes are formed in the first screening cylinder. The section of the first through hole is in a lightning shape, and by means of the structure, even if straw is clamped in the first through hole, the cleanliness of the first through hole is improved due to the fact that the structure of the first through hole cannot penetrate through the first through hole.

Description

Technical Field

[0001] The present invention relates to the technical field of grain screening, and specifically to a double-drum rotary vibrating screen with an anti-blocking function. Background Art

[0002] A rotary vibrating screen is a general device that realizes efficient classification and screening of materials through high-frequency multi-dimensional vibration, and is widely used in the sorting operations of granular materials in industries such as chemical industry, food, medicine, and metallurgy. Its core structure consists of a vibration motor, a screen box, a screen mesh, a damping spring, and a base: the vibration motor generates an exciting force to drive the screen box to vibrate in an elliptical trajectory in the horizontal, vertical, and inclined three-dimensional spaces. Under the combined action of centrifugal force, gravity, and throwing force on the screen surface, the material moves in a spiral jumping motion. Fine particles pass through multiple layers of screen meshes to achieve multi-stage separation, and coarse materials are automatically discharged from the slag discharge port.

[0003] When the current rotary vibrating screen is in use, there is often a situation where a large amount of straw is contained in the grain to be screened. These straws will block the screen holes, thereby causing the screening plate of the rotary vibrating screen to fail. Moreover, due to the harsh environment inside the screening box, it is impossible to accurately observe the specific operating conditions inside the screening box (such as the blocked situation of the screening plate) through the observation window. Summary of the Invention

[0004] To solve the problem of straw blocking the screen holes proposed in the above background art, the purpose of the present invention is to provide a double-drum rotary vibrating screen with an anti-blocking function.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A double-drum rotary vibrating screen with an anti-blocking function, including a bracket, a diversion channel is cooperatively installed on the upper side of the bracket, and a feed bin is cooperatively installed on the upper side of the diversion channel; The bracket is cooperatively installed with a first screening box and a second screening box, a screening plate is cooperatively installed inside the second screening box, and the screening plate is inclined; A drum frame is rotatably cooperatively installed inside the first screening box, a first rotary screening member is cooperatively installed on the drum frame, the first rotary screening member includes a first screening cylinder, a first fixing plate, and a second fixing plate. The first screening cylinder is cooperatively installed on the drum frame, and a number of first through holes are opened on the first screening cylinder. The first through holes are composed of two blind holes with opposite directions, and its cross-section is in the shape of a lightning bolt; A number of MEMS vibration sensors are cooperatively installed on the first fixing plate, brush hairs are cooperatively installed on the MEMS vibration sensors, the brush hairs are arranged in cooperation with the first screening cylinder, a hollow plate is cooperatively installed on the second fixing plate, a number of nozzles are cooperatively installed on the hollow plate, and a first connecting pipe is cooperatively installed on the hollow plate.

[0006] Preferably, a plurality of weight-reducing holes are provided on the first fixing plate, a third driving motor is cooperatively installed on the bracket, the third driving motor is drivingly connected to the roller frame, the roller frame is obliquely arranged, and the second screening box is located above the first screening box and is cooperatively arranged therewith.

[0007] Preferably, moving wheels are cooperatively installed on the lower side of the bracket, and a towing hook is cooperatively installed on one side of the bracket.

[0008] Preferably, a large-particle impurity discharge chute is cooperatively installed on one side of the first screening box, a first grain discharge chute is cooperatively installed on one side of the second screening box, a second grain discharge chute is cooperatively installed on the bracket, the first grain discharge chute is cooperatively arranged with the second grain discharge chute, and a small-particle impurity discharge chute is cooperatively installed on the lower side of the second screening box.

[0009] Preferably, a dust removal box is fixedly installed on the bracket, one side of the dust removal box is connected to the second grain discharge chute through a connecting channel, and a plurality of dust removal cloth bags are cooperatively installed in the dust removal box.

[0010] Preferably, a high-speed blower is cooperatively installed on one side of the dust removal box, an ash discharge auger is cooperatively installed on the lower side of the dust removal box, and a second driving motor is cooperatively installed on one side of the dust removal box.

[0011] Preferably, the second driving motor is drivingly connected to the ash discharge auger, a dust discharge chute is cooperatively installed on the bracket, and the dust discharge chute is correspondingly cooperatively arranged with the ash discharge auger.

[0012] Preferably, a first driving motor is cooperatively installed on the bracket, an eccentric motor is cooperatively installed on the lower side of the second screening box, and the first driving motor is drivingly connected to the eccentric motor through a belt and a pulley.

[0013] Preferably, a second rotating screening member is further cooperatively installed on the roller frame; The second rotating screening member includes a second screening cylinder and a third fixing plate, a plurality of second through holes are provided on the second screening cylinder, and the second through holes are obliquely arranged long strips.

[0014] Preferably, a plurality of third driving motors are fixedly installed on the third fixing plate, the third driving motors are drivingly connected to an installation disc, and a plurality of cleaning brushes are cooperatively installed on the installation disc, and the cleaning brushes are cooperatively arranged with the second through holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The first screening cylinder of the present invention adopts a through-hole structure with a lightning-shaped cross section, and its asymmetric zigzag inner wall forms a multi-level variable diameter constraint. When straw-like long-fiber materials enter the through-hole, they are restricted by the interruption of the continuity of the geometric shape and cannot penetrate and stay in the axial direction. This structure produces a double anti-blocking effect during the material screening process: on the one hand, the sharp-angle turning area formed by the edge of the special-shaped through-hole exerts lateral shear force on the stuck material, triggering the self-sharpening effect to break the fiber bundle; on the other hand, the matching directional high-pressure air pulse nozzle (the injection angle matches the inclination angle of the through-hole zigzag line) can accurately act on the obstructed area, and use the airflow vortex stripping effect to completely remove the residue. Compared with traditional round hole or square hole screens, this design significantly improves the passability of high-moisture content and easily entangled materials, while reducing the frequency of clearing operations. It is particularly suitable for efficient screening scenarios of rice, wheat and soybeans.

[0016] During the operation of the screening device of the present invention, the bristles move circumferentially around the first screening cylinder at a relatively constant rotation speed. When the bristles periodically cut into the first through holes preset on the surface of the screening cylinder, the bristles produce a characteristic vibration effect due to the sudden change of the contact interface. The MEMS vibration sensor array integrated in the screening cylinder structure can capture the dynamic mechanical response of the bristles when they contact the through holes in real time - when the bristles enter the unblocked through holes, the vibration signal received by the sensor presents a regular attenuation waveform; and when the through holes are blocked by foreign objects such as straw, the collision energy transfer between the bristles and the blockage will cause significant distortion of the vibration spectrum (manifested as abnormal enhancement of the amplitude and a sudden increase in high-frequency harmonic components). The control system performs pattern recognition on the vibration signal based on a machine learning algorithm, and can accurately determine the real-time blockage status of each through hole by comparing with the benchmark vibration feature library. This technology realizes fully automatic blockage monitoring of the screening process, and has stronger anti-interference ability than traditional visual detection solutions, and is particularly suitable for agricultural material processing scenarios with high dust and high debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The basic structure of a double drum vibrating screen with anti-blocking function of the present invention is shown in FIG. Figure 1 .

[0018] Figure 2 The basic structure of a double drum vibrating screen with anti-blocking function of the present invention is shown in FIG. Figure 2 .

[0019] Figure 3 The internal structure of a double drum vibrating screen with anti-blocking function of the present invention is shown in FIG. Figure 1 .

[0020] Figure 4 The internal structure of a double drum vibrating screen with anti-blocking function of the present invention is shown in FIG. Figure 2 .

[0021] Figure 5 The front view of a double-drum vibrating screen with an anti-blocking function according to the present invention Figure 4 .

[0022] Figure 6 The flow schematic diagram of grains of a double-drum vibrating screen with an anti-blocking function according to the present invention

[0023] Figure 7 The basic structure schematic of the first rotating screening member of a double-drum vibrating screen with an anti-blocking function according to the present invention Figure 1 .

[0024] Figure 8 The basic structure schematic diagram of the first rotating screening member of a double-drum vibrating screen with an anti-blocking function according to the present invention. Two

[0025] Figure 9 The front view of a double-drum vibrating screen with an anti-blocking function according to the present invention Figure 8 .

[0026] Figure 10 The A-A cross-sectional view of a double-drum vibrating screen with an anti-blocking function according to the present invention Figure 9 .

[0027] Figure 11 The enlarged view of part A of a double-drum vibrating screen with an anti-blocking function according to the present invention Figure 10 .

[0028] Figure 12 The basic structure schematic diagram of the second rotating screening member of a double-drum vibrating screen with an anti-blocking function according to the present invention

[0029] In the figure: 101, support; 102, moving wheel; 103, towing hook; 104, feeding bin; 105, diversion channel; 106, first screening box; 107, drum frame; 108, large particle impurity discharge chute; 109, second screening box; 110, screening plate; 111, first driving motor; 112, eccentric motor; 113, first grain discharge chute; 114, second grain discharge chute; 115, small particle impurity discharge chute; 116, fourth driving motor; 201, dust removal box; 202, high-speed blower; 203, ash auger; 204, second driving motor; 205, dust discharge chute; 206, connecting channel; 207, dust removal cloth bag; 300, first rotating screening member; 301, first screening cylinder; 302, first through hole; 303, first connecting pipe; 304, hollow plate; 305, spray head; 306, first fixing plate; 307, MEMS vibration sensor; 308, second fixing plate; 309, weight reduction hole; 310, brush; 400, second rotating screening member; 401, second screening cylinder; 402, second through hole; 403, third fixing plate; 404, third driving motor; 405, mounting disc; 406, cleaning brush. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0031] As Figures 1 - 11 shown, a double-drum rotary vibrating screen with an anti-blocking function provided in this embodiment has a moving wheel 102 fitted and installed under the support 101. The moving wheel 102 is a wheel body with a holding brake function. A towing hook 103 is fitted and installed on one side of the support 101. Through the towing hook 103, the present application can be conveniently moved. A diversion channel 105 is fitted and installed on the upper side of the support 101, and a feeding bin 104 is fitted and installed on the upper side of the diversion channel 105. When the grain to be screened is put in through the feeding bin 104, the grain to be screened will be evenly divided into two streams through the diversion channel 105.

[0032] A first screening box 106 is fitted and installed on the support 101, and a second screening box 109 is also fitted and installed on the support 101. The second screening box 109 is arranged in cooperation with the first screening box 106. A screening plate 110 is fitted and installed in the second screening box 109. The screening plate 110 is inclined. The screening plate 110 is used to screen out small particle impurities in the grain. The small particle impurities can pass through the screening plate 110, and the qualified grain remains above the screening plate 110.

[0033] On one side of the first screening box 106, a large-particle impurity discharge chute 108 is fitted and installed. On one side of the second screening box 109, a first grain discharge chute 113 is fitted and installed. On the support 101, a second grain discharge chute 114 is fitted and installed. The first grain discharge chute 113 is arranged above the screening plate 110. The first grain discharge chute 113 and the second grain discharge chute 114 are arranged in cooperation. On the lower side of the second screening box 109, a small-particle impurity discharge chute 115 is fitted and installed. The small-particle impurity discharge chute 115 is arranged below the screening plate 110.

[0034] In the first screening box 106, two oppositely arranged drum frames 107 are rotatably fitted and installed. The drum frames 107 are arranged obliquely. The drum frames 107 are driven to rotate by the fourth drive motor 116 on the support 101 and the corresponding speed reducer. The fourth drive motor 116 and the speed reducer are linked by the corresponding belt and pulley. On the drum frames 107, a first rotary screening member 300 is fitted and installed. The first rotary screening member 300 includes a first screening cylinder 301, a first fixing plate 306 and a second fixing plate 308. The first screening cylinder 301 is fitted and installed on the drum frames 107. A number of first through holes 302 are formed in the first screening cylinder 301.

[0035] A number of MEMS vibration sensors 307 are fitted and installed on the first fixing plate 306. On the MEMS vibration sensors 307, brush hairs 310 are fitted and installed. The brush hairs 310 are arranged in cooperation with the first screening cylinder 301. On the second fixing plate 308, a hollow plate 304 is fitted and installed. On the hollow plate 304, a number of spray nozzles 305 are fitted and installed. On the hollow plate 304, a first connecting pipe 303 is fitted and installed. A number of weight-reducing holes 309 are formed in the first fixing plate 306. The weight-reducing holes 309 can be used to reduce the weight of the first fixing plate 306 and further improve the stability and safety of this embodiment.

[0036] In this embodiment, the first screening cylinder 301 is a cylindrical shape rolled by iron sheet. The first screening cylinder 301 is arranged closely against the drum frames 107. Refer to Figure 11, the first through-hole 302 is composed of two blind holes in opposite directions, so that the cross-section of the first through-hole 302 forms a lightning shape. This kind of through-hole is convenient for production. Before the first screening cylinder 301 is rolled into a cylindrical shape, blind holes are drilled on both sides of the first screening cylinder 301 through a drill bit. The two blind holes are connected to form the lightning-shaped first through-hole 302. With this structure, even if straw gets stuck in the first through-hole 302, it cannot penetrate due to the structure of the first through-hole 302. Then, the high-pressure gas sprayed by the nozzle 305 can blow down the straw, further improving the cleanliness of the first through-hole 302. When the brush bristles 310 rotate around the first screening cylinder 301 (and when the rotation speed of the first screening cylinder 301 is uniform), the brush bristles 310 will enter the first through-hole 302 once every fixed time, causing an abnormal vibration of the brush bristles 310. This vibration can be captured by the MEMS vibration sensor 307 and recognized by the control system (the control system is a conventional computer control method not shown in the figure). The vibration data recognized by the MEMS vibration sensor 307 when the brush bristles 310 enter the first through-hole 302 is a, and the vibration data recognized by the MEMS vibration sensor 307 when the brush bristles 310 enter the first through-hole 302 blocked by straw is b. By identifying the types of vibration data of the MEMS vibration sensor 307, the blockage situation of the first through-hole 302 on the first screening cylinder 301 can be known.

[0037] A dust removal box 201 is fixedly installed on the bracket 101. One side of the dust removal box 201 is connected to the second grain discharge chute 114 through a connection channel 206. A number of dust removal bags 207 are installed in the dust removal box 201 in a matching manner. A high-speed blower 202 is installed on one side of the dust removal box 201 in a matching manner. An ash discharge auger 203 is installed on the lower side of the dust removal box 201 in a matching manner. A second drive motor 204 is installed on one side of the dust removal box 201 in a matching manner. The second drive motor 204 is drivingly connected to the ash discharge auger 203. A dust discharge chute 205 is installed on the bracket 101 in a matching manner. The dust discharge chute 205 is arranged corresponding to the ash discharge auger 203.

[0038] A first drive motor 111 is installed on the bracket 101 in a matching manner. An eccentric motor 112 is installed on the lower side of the second screening box 109 in a matching manner. The first drive motor 111 is drivingly connected to the eccentric motor 112 through a belt and a pulley. The vibration generated by the rotation of the eccentric motor 112 is transmitted to the second screening box 109, controlling the screening plate 110 to further screen the grain.

[0039] It should be noted that when this embodiment is in use, refer to Figure 6 (In the figure, the red arrow is the moving direction of the grain, the blue arrow is the moving direction of the large particle impurities, the green arrow is the moving direction of the small particle impurities, the pink arrow is the inflow direction of the gas, and the black arrow is the moving direction of the dust), and the steps are as follows: Step 1: Put the grains to be screened into the feed bin 104. After the grains to be screened are shunted through the shunt channel 105, they enter the corresponding first rotary screening member 300; Step 2: The first rotary screening member 300 rotates driven by the fourth drive motor 116. While the first rotary screening member 300 is rotating, the grains and small particle impurities fall above the screening plate 110 through the first screening cylinder 301, and at the same time, the large particle impurities are discharged through the large particle impurity discharge chute 108; Step 3: When the grains and small particle impurities pass through the first screening cylinder 301 above the screening plate 110, the eccentric motor 112 below the second screening box 109 rotates. During the vibration of the grains and small particle impurities above the screening plate 110, the small particle impurities pass through the screening plate 110 and are discharged through the small particle impurity discharge chute 115, and the grains with qualified particle sizes remain above the screening plate 110 and enter the second grain discharge chute 114 through the first grain discharge chute 113; Step 4: After the grains enter the second grain discharge chute 114, the high-speed blower 202 sucks air outwards, so that the dust removal box 201 sucks air into the second grain discharge chute 114 through the connection channel 206, so that the small particle dust in the grains enters the dust removal box 201. The air with dust passes through the dust removal cloth bag 207, and the air is discharged through the high-speed blower 202. The dust adheres to the dust removal cloth bag 207. During the backwashing process of the dust removal cloth bag 207, the dust on the dust removal cloth bag 207 is shaken off, and the dust is discharged through the ash auger 203 via the second drive motor 204.

[0040] In another embodiment of the present application, refer to Figure 12 , the second rotary screening member 400 is fitted on the drum frame 107, rather than the first rotary screening member 300. The second rotary screening member 400 includes a second screening cylinder 401 and a third fixing plate 403. A number of second through holes 402 are formed in the second screening cylinder 401. The second through holes 402 are oblong and inclined. A number of third drive motors 404 are fixedly installed on the third fixing plate 403. The third drive motors 404 are drivingly connected with a mounting disc 405. A number of cleaning brushes 406 are fitted on the mounting disc 405. The cleaning brushes 406 are arranged in cooperation with the second through holes 402.

[0041] In this embodiment, the second screening cylinder 401 is a cylindrical shape rolled from iron sheet. The second screening cylinder 401 is arranged closely against the drum frame 107. The oblong second through holes 402 can facilitate the cleaning brushes 406 to clean the second through holes 402 and prevent the straw from blocking the second through holes 402.

[0042] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Also, the terms "comprises," "comprising," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double drum vibrating screen with anti-blocking function, characterized in that: It comprises a bracket (101), a flow diversion channel (105) is co-operatingly mounted on the upper side of the bracket (101), and a feed bin (104) is co-operatingly mounted on the upper side of the flow diversion channel (105); A first screening box (106) and a second screening box (109) are cooperatively mounted on the bracket (101); a screening plate (110) is cooperatively mounted in the second screening box (109); and the screening plate (110) is arranged to be inclined; A drum frame (107) is rotatably mounted in the first screening box (106), a first rotating screening element (300) is mounted on the drum frame (107), the first rotating screening element (300) comprises a first screening cylinder (301), a first fixing plate (306) and a second fixing plate (308), the first screening cylinder (301) is mounted on the drum frame (107), a plurality of first through holes (302) are formed on the first screening cylinder (301), the first through holes (302) are formed of two blind holes in opposite directions, and the cross section thereof is in the shape of a lightning bolt; A plurality of MEMS vibration sensors (307) are mounted on the first fixed plate (306), bristles (310) are mounted on the MEMS vibration sensor (307), and the bristles (310) are arranged in cooperation with the first screening cylinder (301). A hollow plate (304) is mounted on the second fixed plate (308), a plurality of nozzles (305) are mounted on the hollow plate (304), and a first connecting pipe (303) is mounted on the hollow plate (304).

2. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: The first fixing plate (306) is provided with a plurality of weight-reducing holes (309). The bracket (101) is cooperatively mounted with a fourth drive motor (116). The fourth drive motor (116) drives a connected roller frame (107). The roller frame (107) is arranged at an angle. The second screening box (109) is located above the first screening box (106) and is arranged in cooperation with each other.

3. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: A moving wheel (102) is co-installed on the lower side of the bracket (101), and a towing hook (103) is co-installed on one side of the bracket (101).

4. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: A large particle impurity discharge trough (108) is installed on one side of the first screening box (106), a first grain discharge trough (113) is installed on one side of the second screening box (109), a second grain discharge trough (114) is installed on the bracket (101), the first grain discharge trough (113) and the second grain discharge trough (114) are arranged in cooperation, and a small particle impurity discharge trough (115) is installed on the lower side of the second screening box (109).

5. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: A dust removal box (201) is fixedly mounted on the bracket (101); one side of the dust removal box (201) is connected to the second grain discharge trough (114) via a connecting channel (206); and a plurality of dust removal bags (207) are cooperatively mounted in the dust removal box (201).

6. The double-drum vibrating screen with anti-blocking function according to claim 5, characterized in that: A high-speed fan (202) is co-installed on one side of the dust removal box (201), a ash discharge auger (203) is co-installed on the lower side of the dust removal box (201), and a second drive motor (204) is co-installed on one side of the dust removal box (201).

7. The double-drum rotary vibrating screen with anti-blocking function according to claim 6, characterized in that: The second driving motor (204) is driven and connected to the ash discharging auger (203); a dust discharging trough (205) is mounted on the bracket (101); the dust discharging trough (205) is arranged to correspond to the ash discharging auger (203).

8. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: A first drive motor (111) is mounted on the bracket (101), an eccentric motor (112) is mounted on the lower side of the second screening box (109), and the first drive motor (111) is connected to the eccentric motor (112) via a belt and a pulley.

9. The double-drum vibrating screen with anti-blocking function according to claim 1, characterized in that: The drum frame (107) is also equipped with a second rotating screening element (400); The second rotating screening element (400) comprises a second screening cylinder (401) and a third fixing plate (403). The second screening cylinder (401) is provided with a plurality of second through holes (402). The second through holes (402) are in the shape of obliquely arranged long strips.

10. The double-drum vibrating screen with anti-blocking function according to claim 9, characterized in that: A plurality of third drive motors (404) are fixedly mounted on the third fixed plate (403); the third drive motors (404) are drive-connected to a mounting plate (405); a plurality of cleaning brushes (406) are mounted on the mounting plate (405); the cleaning brushes (406) are arranged in cooperation with the second through holes (402).

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