A feed ingredient screening device

Abstract

A feed material screening device relates to the field of material screening, including: a tank body, which is arranged through the top and bottom; an impurity removal mechanism, including two screen frames arranged up and down and moving vertically, one end of the screen frame is rotatably mounted on the tank body; a coarse screening mechanism, which is arranged below the screen frame, including a first screen installed in the tank body, a spacer ring that moves vertically and rotates around its own axis is provided on the first screen, a plurality of push plates are provided on the outside of the spacer ring, and a plurality of scraper rods are provided on the inside of the spacer ring; a fine screening mechanism, which is arranged below the coarse screening mechanism, including a conical shell installed in the tank body and a second screen with a through hole in the center, a plurality of partitions that move radially along the tank body are provided on the second screen, which are used to close the through hole, a plurality of scrapers that rotate around the axis of the tank body and move radially along the tank body are provided between the partition and the tank body, and a baffle that moves in the vertical direction is provided on the outside of the conical shell, which is used to cooperate with the baffle. The present application can simultaneously complete feed material screening and impurity removal operations in one device, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of material screening, and in particular to a feed raw material screening device. Background Art

[0002] In the process of feed production, since the feed raw materials are often mixed with impurities such as stones, hemp ropes, sack pieces, straw, etc., if these impurities are not removed in time, it will seriously affect the purity and quality of the feed, so the feed raw materials must be screened before processing. Since the particle size of most feed raw materials is inconsistent, which will affect the uniformity and utilization rate of the feed, they are usually screened and graded, and then the feed raw materials of different sizes are crushed and processed into powders of different particle sizes, so that different grades of feed are produced through different grades of raw materials. And according to the different needs of animal feeding, some feeds will not be crushed and will be directly mixed with other raw materials, and different animals have different requirements for the particle size and density of feed, so the feed raw materials also need to be graded and screened. In the prior art, feed raw materials are usually processed in a step-by-step manner, that is, first, impurities in the feed raw materials are separated using impurity removal equipment, and then the feed raw materials are graded and screened using a grading and screening machine. If the particle sizes of the raw materials vary greatly, more screening processes are required, and each process requires the use of a screening device, which greatly increases the equipment cost and also makes it difficult to effectively improve production efficiency. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the related prior art, the present application provides a feed raw material screening device, which can simultaneously complete feed raw material screening and impurity removal operations in one device, thereby improving production efficiency and having strong practicality.

[0004] In order to achieve the above object, the present invention adopts the following technologies:

[0005] A feed material screening device comprises: a tank body, a debris removal mechanism, a coarse screening mechanism, and a fine screening mechanism.

[0006] The tank body is arranged through the top and bottom; the impurity removal mechanism is arranged at the upper end of the tank body, including two screen frames which are arranged overlappingly and move in the vertical direction, and one end of the screen frame is rotatably installed on the tank body; the coarse screening mechanism is arranged below the impurity removal mechanism, including a first screen installed in the tank body, the first screen is provided with a spacer ring which moves in the vertical direction and rotates around its own axis, a plurality of push plates are arranged on the outer side of the spacer ring for pushing away the feed raw materials, a plurality of scraper rods which are arranged at intervals in the circumferential direction and rotate around the axis of the tank body are arranged on the inner side of the spacer ring for turning over the feed raw materials; the fine screening mechanism is arranged below the coarse screening mechanism, including a conical shell installed in the tank body and a second screen with a through hole in the center, a plurality of partitions which are arranged at intervals in the circumferential direction and move radially along the tank body are provided on the second screen, which are used to separate the space inside and outside the through hole, a plurality of scrapers which rotate around the axis of the tank body and move radially along the tank body are provided between the partition and the tank body, a baffle which moves in the vertical direction is provided on the outer side of the conical shell, and when used, the conical shell cooperates with the baffle to separate the first screen and the second screen.

[0007] Furthermore, one end of the screen frame is rotatably mounted on the lifting block, the lifting block is sleeved on the vertical rod and connected to the moving end of the first vertical lifting mechanism, the first vertical lifting mechanism is installed on the tank body, and a driven gear is provided at one end of the screen frame, the driven gear is meshed with the first driving gear, the first driving gear is sleeved on the first transmission shaft, the first transmission shaft is rotatably mounted on the lifting block, and connected to the output end of the first power equipment.

[0008] Furthermore, the scraper rod is L-shaped, and the end of the horizontal section faces the axis of the tank body. The upper end of the scraper rod is inserted into the rotating block, the rotating block is rotatably mounted on the ring gear, the ring gear is rotatably mounted on the upper end of the tank body and meshes with the second driving gear, the second driving gear is sleeved on the second transmission shaft, the second transmission shaft is rotatably mounted on the tank body and connected to the output end of the second power equipment.

[0009] Furthermore, an annular groove is provided on the inner wall of the tank body, the bottom of the annular groove is a downwardly inclined slope, two annular plates are provided in the annular groove along its circumferential direction, the first screen is provided on the inner side of the lower annular plate, and the top surface is not higher than the top surface of the lower annular plate, a plurality of sieve holes are provided on the lower annular plate along its circumferential direction, a plurality of through grooves are provided on the inner wall of the upper annular plate along the circumferential direction for passing a push plate, a notch is also provided on the side wall of the annular groove, the notch is located between the two annular plates for discharging feed materials, when the lower end of the partition ring contacts the lower annular plate, the push plate is located between the two annular plates, and when the push plate is inserted in the through groove, the notch is in a closed state;

[0010] Furthermore, the outer wall of the partition ring contacts the inner wall of the upper ring plate and is slidably connected to the lifting plate. One end of the lifting plate passes through the tank body and is connected to the moving end of the second vertical lifting mechanism. The second vertical lifting mechanism is installed on the tank body.

[0011] Furthermore, a plurality of mounting plates are provided on the circumferential side of the conical shell, one end of the mounting plate is connected to the inner wall of the tank body, and the baffle is annular. When in use, the bottom surface of the baffle abuts against the mounting plate, and the inner wall cooperates with the outer wall of the conical shell. A plurality of movable plates are provided along the circumferential direction on the outer side of the baffle, and a plurality of through grooves are provided along the circumferential direction on the side edge of the tank body. The movable plate passes through the through groove and is connected to the movable end of the third vertical lifting mechanism. The third vertical lifting mechanism is installed on the outer side of the tank body, and closing plates are provided on the upper and lower sides of the baffle along the circumferential direction for closing the through groove.

[0012] Furthermore, the partition is arc-shaped, and when the partitions contact each other, they form a ring, and the outer wall of the partition is provided with a connecting plate, and the connecting plate is sleeved on the support rod, and the support rod is installed on the bracket, and a first spring is sleeved on the support rod, and the two ends of the first spring are respectively abutted against the connecting plate and the upper end of the bracket, and are always in a compressed state;

[0013] Furthermore, a cross bar is provided on the side wall of the bracket, a convex plate is provided on the bottom surface of the mounting plate, the cross bar passes through the convex plate and the tank body in sequence, a second spring is sleeved on the cross bar, two ends of the second spring respectively abut against the bracket and the convex plate, and are always in a compressed state.

[0014] Furthermore, a support ring is provided on the outside of the tank body, a cross bar is passed through the support ring, and a clamping plate is provided at the end, the lower end of the clamping plate exceeds the bottom surface of the support ring, and the inner side cooperates with the limit ring, the limit ring rotates around its own axis and is installed on the support ring, the limit ring includes a plurality of first arc segments, a second arc segment is provided between two adjacent first arc segments, the first arc segment and the second arc segment are connected to each other by a transition segment, and the diameters of the first arc segment and the second arc segment are not equal.

[0015] Furthermore, a rotating ring is provided above the scraper, which rotates around its own axis and is installed on the inner wall of the tank body. A plurality of connecting rods arranged at intervals along the circumferential direction are provided on the inner side of the rotating ring. A convex rod is provided above the connecting rod. The connecting rod and the convex rod are provided with sliding grooves along their length directions. Two through rods are provided on the top surface of the scraper. The through rods are inserted in the sliding grooves. A retaining ring is provided on the through rod and a clamping ring is sleeved on the through rod. The retaining ring and the clamping ring are both located between the connecting rod and the convex rod. A third spring is sleeved on the through rod, and the two ends of the third spring respectively abut against the retaining ring and the clamping ring, and are always in a compressed state. A convex block is provided on the side of one of the clamping rings, and a side rod is inserted in the convex block. One end of the side rod is connected to the convex rod, and a fourth spring is sleeved on the side rod. The two ends of the fourth spring respectively abut against the end of the convex block and the convex rod, and are always in a compressed state.

[0016] Furthermore, an arc rod is provided at the upper end of the through rod away from the center of the tank body, and a plurality of pressure plates arranged at intervals are provided on the bottom surface of the baffle along the circumferential direction. The pressure plates are arc-shaped, and the lower ends are inclined toward the central axis of the tank body. When used, the arc rod contacts the outer wall of the pressure plate, and the length of the arc rod is greater than the spacing between two adjacent pressure plates.

[0017] Furthermore, the top surface of the first screen is in an arc shape that gradually descends from the center to the circumference, and the top surface of the second screen is in an inwardly concave arc shape.

[0018] The beneficial effects of the present invention are as follows: a screen frame is arranged at the upper end of the tank body to separate impurities in the feed raw materials, and two screen frames are arranged, and the screen frames are movable as a whole, so that the impurities collected in the screen frames can be cleaned without interrupting the screening operation, so as to improve the screening efficiency; the feed raw materials can be graded and screened in time after the impurities are separated through the coarse screening mechanism and the fine screening mechanism, and the separated feed raw materials can be transferred in time during the screening process, so as to further improve the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of an embodiment of the present application.

[0021] Figure 2 It is a three-dimensional schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the impurity removal mechanism according to an embodiment of the present application.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the coarse screening mechanism of an embodiment of the present application.

[0024] Figure 5 for Figure 4 An enlarged schematic diagram of point A.

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the fine screening mechanism of an embodiment of the present application.

[0026] Figure 7 This is a schematic diagram of the partition installation of an embodiment of the present application.

[0027] Figure 8 This is a schematic diagram of the scraper installation of an embodiment of the present application.

[0028] Fig. 9 for Figure 8 An enlarged schematic diagram of point B.

[0029] Description of the accompanying drawings: 100 - tank body, 200 - impurity removal mechanism, 300 - coarse screening mechanism, 400 - fine screening mechanism, 101 - annular groove, 102 - annular plate, 103 - through groove, 104 - through groove, 201 - screen frame, 202 - lifting block, 203 - vertical rod, 204 - driven gear, 205 - first driving gear, 206 - first transmission shaft, 301 - first screen, 302 - scraper rod, 303 - spacer ring, 304 - push plate, 305 - rotating block, 306 - gear ring, 307 - second driving gear, 308 - second transmission shaft, 309 - lifting plate, 401 - second screen, 402 - through hole, 403 - spacer plate, 4 04—scraper, 405—conical shell, 406—baffle, 407—mounting plate, 408—connecting plate, 409—support rod, 410—bracket, 411—first spring, 412—cross bar, 413—convex plate, 414—second spring, 415—support ring, 416—clamp plate, 417—limiting ring, 418—rotating ring, 419—connecting rod, 420—convex rod, 421—slide groove, 422—through rod, 423—baffle ring, 424—clamp ring, 425—third spring, 426—arc rod, 427—pressure plate, 428—movable plate, 429—closing plate, 430—convex block, 431—side rod, 432—fourth spring. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figure 1 to Figure 9 As shown, an embodiment of the present application provides a feed raw material screening device, including: a tank body 100, a debris removal mechanism 200, a coarse screening mechanism 300, and a fine screening mechanism 400.

[0032] The tank body 100 is arranged through the upper and lower parts; the impurity removal mechanism 200 is arranged at the upper end of the tank body 100, including two screen frames 201 which are arranged overlappingly and move in the vertical direction, and one end of the screen frame 201 is rotatably installed on the tank body 100, and the impurities in the feed raw materials are collected through the screen frame 201; the coarse screening mechanism 300 is arranged below the impurity removal mechanism 200, including a first screen 301 installed in the tank body 100, and the first screen 301 is provided with a spacer ring 303 which moves in the vertical direction and rotates around its own axis, and the outer side of the spacer ring 303 is provided with a plurality of push plates 304 for pushing away the feed raw materials left on the first screen 301 after screening, and the inner side of the spacer ring 303 is provided with a plurality of scraper rods 302 which are arranged at intervals in the circumferential direction and rotate around the axis of the tank body 100, and are used to turn over the feed raw materials; the fine screening mechanism 400 is arranged below the coarse screening mechanism 300, including a cone screen installed in the tank body 100; The conical shell 405 and the second screen 401 with a through hole 402 in the center are provided with a plurality of partitions 403 arranged at intervals in the circumferential direction and moving radially along the tank body 100, which are used to separate the space inside and outside the through hole 402 to prevent the feed material from falling from the through hole 402 before being screened by the second screen 401. A plurality of scrapers 404 rotating around the axis of the tank body 100 and moving radially along the tank body 100 are provided between the partition 403 and the tank body 100. A baffle 406 moving in the vertical direction is provided on the outer side of the conical shell 405. When used, the conical shell 405 cooperates with the baffle 406 to separate the first screen 301 and the second screen 401, so that the feed material on the second screen 401 can be transferred from the through hole 402 at this time; if the feed material needs to be screened multiple times, it is only necessary to increase the number of coarse screening mechanisms 300.

[0033] Specifically, Figure 1-Figure 2 As shown, the top surface of the first screen 301 is in an arc shape that gradually descends from the center to the circumference, so that after the feed raw materials fall from the screen frame 201, they can move toward the circumference of the first screen 301 under the action of their own gravity, thereby ensuring the screening effect and facilitating the collection of the screened feed raw materials. The top surface of the second screen 401 is in a concave arc shape, so that the feed raw materials falling through the first screen 301 can automatically move toward the center of the second screen 401, so as to facilitate the transfer of the feed raw materials intercepted by the second screen 401 through the through hole 402.

[0034] Specifically, Figure 2-Figure 3As shown, one end of the screen frame 201 is rotatably mounted on the lifting block 202, the lifting block 202 is sleeved on the vertical rod 203, and is connected to the moving end of the first vertical lifting mechanism, the first vertical lifting mechanism is installed on the tank body 100, and one end of the screen frame 201 is provided with a driven gear 204, the driven gear 204 is meshed with the first driving gear 205, the first driving gear 205 is sleeved on the first transmission shaft 206, the first transmission shaft 206 is rotatably mounted on the lifting block 202, and is connected to the output end of the first power device, when it is necessary to remove impurities in the feed raw materials, the feed raw materials are directly and continuously put into the screen frame 201, the impurities will be trapped in the screen frame 201, and the feed raw materials will fall on the first screen 301, and after a certain amount of impurities are accumulated in the screen frame 201, it will pass through the first vertical lifting mechanism. The lowering mechanism drives the lifting block 202 to move upward, thereby driving the screen frame 201 to move upward, and then drives the first transmission shaft 206 to rotate through the first power device. Under the meshing of the first driving gear 205 and the driven gear 204, the screen frame 201 is rotated, so that the screen frame 201 is moved out of the tank body 100, and then the impurities collected in the screen frame 201 can be cleaned. At this time, the screen frame 201 located below will continue to collect impurities in the feed raw materials. After the impurities in the screen frame 201 are removed, the screen frame 201 can be reset to the top of the other screen frame 201. At this time, the feed raw materials to be screened will be put into the upper screen frame 201. At the same time, the lower screen frame 201 can be moved and the impurities therein can be removed in the same way as before, and then the two screen frames 201 can be reset.

[0035] Specifically, if Figure 2 , Figure 4 , Figure 5 As shown, the scraper rod 302 is L-shaped, and the end of the horizontal section faces the axis of the tank body 100. In order to avoid interference, the upper end of the scraper rod 302 is inserted into the rotating block 305, and the rotating block 305 is rotatably mounted on the gear ring 306. The gear ring 306 is rotatably mounted on the upper end of the tank body 100 and meshes with the second driving gear 307. The second driving gear 307 is sleeved on the second transmission shaft 308. The second transmission shaft 308 is rotatably mounted on the tank body 100 and connected to the output end of the second power device. The power device drives the second transmission shaft 308 to rotate, thereby driving the scraper rod 302 to rotate around the central axis of the tank body 100 under the meshing of the second driving gear 307 and the ring gear, so as to turn the feed materials on the first screen 301 to achieve the initial screening of the feed materials, and after the scraper rod 302 is damaged, the scraper rod 302 can be moved upward for a distance, and then the rotating block 305 is rotated upward, so that the scraper rod 302 can be pulled out from the rotating block 305 for replacement.

[0036] Specifically, if Figure 2 , Figure 4 , Figure 5 As shown, the inner wall of the tank body 100 is provided with an annular groove 101, the bottom of the annular groove 101 is a downwardly inclined slope, two annular plates 102 are provided in the annular groove 101 along its circumferential direction, the first screen 301 is provided on the inner side of the lower annular plate 102, and the top surface is not higher than the top surface of the lower annular plate 102, a plurality of sieve holes are provided on the lower annular plate 102 along its circumferential direction, a plurality of through grooves 103 are provided on the inner wall of the upper annular plate 102 along the circumferential direction for passing the push plate 304, and the side wall of the annular groove 101 is also provided with notches, the notches are located at the two The spacer ring 303 is located between the two ring plates 102 for discharging feed materials. When the lower end of the spacer ring 303 contacts the lower ring plate 102, the push plate 304 is located between the two ring plates 102. When the push plate 304 is inserted into the through groove 103, the gap is in a closed state. The outer wall of the spacer ring 303 contacts the inner wall of the upper ring plate 102 and is slidably connected to the lifting plate 309. One end of the lifting plate 309 passes through the tank body 100 and is connected to the moving end of the second vertical lifting mechanism. The second vertical lifting mechanism is installed on the tank body 100. When the feed materials fall on the first screen 301, the feed materials will roll on the first screen 301, and the feed materials with smaller diameters will fall into the fine screen mechanism 400, while the feed materials with larger diameters will gradually be collected in the ring plate 102 below. At this time, the lifting plate 309 can be driven to move downward by the second vertical lifting mechanism, thereby driving the spacer ring 303 to move downward. At this time, the push plate 304 will also pass through the through groove 103 until the spacer ring 303 abuts against the ring plate 102 below. At this time, the spacer ring 303 will separate the two The space between the ring plates 102 is closed, and then the spacer ring 303 can be driven to rotate, so that the feed materials with smaller diameters remaining on the ring plates 102 fall from the sieve holes and enter the fine screen mechanism 400, and then the gap on the side wall of the annular groove 101 can be opened. As the spacer ring 303 continues to rotate, the push plate 304 can be used to push the feed materials with larger diameters out of the gap. After the operation is completed, the gap is closed and the spacer ring 303 is lifted. The rotation of the spacer ring 303 can be driven by the meshing of the gear ring and the gear.

[0037] Specifically, Figure 2 , Figure 6 , Figure 7As shown, a plurality of mounting plates 407 are provided on the circumferential side of the conical shell 405, one end of the mounting plate 407 is connected to the inner wall of the tank body 100, the baffle 406 is annular, and a plurality of movable plates 428 are provided on the outer side of the baffle 406 along the circumferential direction, and a plurality of through slots 104 are provided on the side edge of the tank body 100 along the circumferential direction, and the movable plates 428 pass through the through slots 104 and are connected to the movable end of the third vertical lifting mechanism, and the third vertical lifting mechanism is installed on the outer side of the tank body 100. When it is necessary to separate the coarse screening mechanism 300 and the fine screening mechanism 400, the baffle 406 is driven downward by the third vertical lifting mechanism, so that the bottom surface of the baffle 406 abuts against the mounting plate 407, and the inner wall cooperates with the outer wall of the conical shell 405, thereby dividing the tank body 100 into two sections, and the baffle 406 is provided with closing plates 429 on both upper and lower sides along the circumferential direction, which are used to close the through slots 104 to prevent the feed raw materials from leaking from the through slots 104 during the screening process.

[0038] Specifically, if Figure 2 , Figure 6 , Figure 7 As shown, the partition 403 is arc-shaped. When the partitions 403 contact each other, they form a ring. The outer wall of the partition 403 is provided with a connecting plate 408, and the connecting plate 408 is sleeved on a support rod 409. The support rod 409 is installed on a bracket 410. A first spring 411 is sleeved on the support rod 409. The two ends of the first spring 411 are respectively abutted against the connecting plate 408 and the upper end of the bracket 410, and are always in a compressed state. Under the action of the first spring 411, the multiple partitions 403 always have a tendency to move downward, thereby ensuring that the lower ends of the multiple partitions 403 are always in contact with the second screen 401 during the screening process, so as to separate the area around the through hole 402 and prevent the feed raw materials from passing through the gap between the partition 403 and the second screen 401 in advance and then falling from the through hole 402.

[0039] More specifically, Figure 2 , Figure 6 , Figure 7 As shown, a cross bar 412 is provided on the side wall of the bracket 410, and a convex plate 413 is provided on the bottom surface of the mounting plate 407. The cross bar 412 passes through the convex plate 413 and the tank body 100 in sequence. A second spring 414 is sleeved on the cross bar 412. The two ends of the second spring 414 respectively abut against the bracket 410 and the convex plate 413 and are always in a compressed state. Under the action of the second spring 414, the partition 403 always has a tendency to move toward the central axis of the tank body 100, thereby ensuring that the partitions 403 always maintain contact and then form a ring to prevent the feed raw materials from passing through the gaps between the partitions 403 in advance. When the feed raw materials retained on the second screen 401 need to be transferred, an external force away from the center of the tank body 100 is applied to the cross bar 412, so that the second spring 414 is further compressed and drives the partitions 403 away from each other, so that the feed raw materials can fall out from the through hole 402.

[0040] Specifically, if Figure 2 , Figure 6-Figure 9 As shown, in order to facilitate the synchronous movement of multiple partitions 403, a support ring 415 is provided on the outside of the tank body 100, and the cross bar 412 is passed through the support ring 415, and a clamping plate 416 is provided at the end. The lower end of the clamping plate 416 exceeds the bottom surface of the support ring 415, and the inner side cooperates with a limiting ring 417. The limiting ring 417 rotates around its own axis and is installed on the support ring 415. The limiting ring 417 includes a plurality of first arc segments, and a second arc segment is provided between two adjacent first arc segments. The first arc segment and the second arc segment are connected to each other by a transition segment, and the diameters of the first arc segment and the second arc segment are not equal. By rotating the limiting ring 417, the clamping plate 416 is changed from a state of contact with the arc segment with a smaller diameter to a state of contact with the arc segment with a larger diameter. In this process, the clamping plate 416 will move along the radial direction of the tank body 100, thereby driving the partition 403 to move. For the rotation of the limiting ring 417, a structure of meshing of gears and gear rings can be adopted.

[0041] Specifically, if Figure 2 , Figure 6-Figure 9As shown, a rotating ring 418 is provided above the scraper 404, which rotates around its own axis and is installed on the inner wall of the tank body 100. The rotation of the rotating ring 418 can also be driven by a mechanism in which a gear and a gear ring are meshed. A plurality of connecting rods 419 are arranged at intervals along the circumferential direction on the inner side of the rotating ring 418. A convex rod 420 is provided above the connecting rod 419. A sliding groove 421 is provided on the connecting rod 419 and the convex rod 420 along their length direction. Two through rods 422 are provided on the top surface of the scraper 404. The rod 422 is inserted into the slide groove 421, a retaining ring 423 is provided on the rod 422, and a snap ring 424 is sleeved thereon. The retaining ring 423 and the snap ring 424 are both located between the connecting rod 419 and the protruding rod 420. A third spring 425 is sleeved on the rod 422, and the two ends of the third spring 425 abut against the retaining ring 423 and the snap ring 424 respectively, and are always in a compressed state. A convex block 430 is provided on the side of one of the snap rings 424, and a side rod 431 is inserted into the convex block 430. The side rod 431 is provided with a convex block 430. One end of the side rod 431 is connected to the protruding rod 420, and a fourth spring 432 is sleeved on the side rod 431. The two ends of the fourth spring 432 are respectively abutted against the end of the protruding block 430 and the protruding rod 420, and are always in a compressed state. Under the action of the third spring 425, the scraper 404 always has a tendency to move downward, thereby ensuring that the scraper 404 can always contact the surface of the second screen 401, ensuring the scraper 404 has a turning effect on the feed raw materials. When the partitions 403 need to be moved away from each other, the scraper 404 needs to be moved away from the central axis of the tank body 100 to avoid interference between the scraper 404 and the partition 403 during the rotation process. At this time, an external force away from the center of the tank body 100 needs to be applied to the scraper 404, so that the penetration rod 422 moves along the slide groove 421. At this time, the fourth spring 432 is also further compressed. After the external force is cancelled, the scraper 404 will move toward the central axis of the tank body 100 under the action of the fourth spring 432.

[0042] Specifically, if Figure 2 , Figure 6-Figure 9 As shown, an arc-shaped rod 426 is provided at the upper end of the through rod 422 away from the center of the tank body 100, and a plurality of spaced pressure plates 427 are provided on the bottom surface of the baffle 406 along the circumferential direction. The pressure plates 427 are arc-shaped, and the lower ends are inclined toward the central axis of the tank body 100. When the partitions 403 need to be moved away from each other, the baffle 406 is moved downward. During the movement of the baffle 406, the arc-shaped rod 426 contacts the outer wall of the pressure plate 427, and as the baffle 406 continues to move, the arc-shaped rod 426 will be forced to move in a direction away from the central axis of the tank body 100, thereby driving the scraper 404 to move together, and the length of the arc-shaped rod 426 is greater than the spacing between two adjacent pressure plates 427, thereby ensuring that the arc-shaped rod 426 will not be stuck between the two pressure plates 427 during the rotation of the scraper 404 around the central axis of the tank body 100.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A feed material screening device, characterized in that: include: The tank body (100) is arranged to penetrate from top to bottom; The impurity removal mechanism (200) is arranged at the upper end of the tank body (100), and comprises two screen frames (201) which are arranged to overlap each other and move in the vertical direction, and one end of the screen frame (201) is rotatably mounted on the tank body (100); The coarse screening mechanism (300) comprises a first screen (301) installed in the tank body (100) and located below the screen frame (201); the first screen (301) is provided with a spacer ring (303) that moves in a vertical direction and rotates around its own axis; a plurality of push plates (304) are provided on the outer side of the spacer ring (303) for pushing away feed materials; a plurality of scraper rods (302) are provided on the inner side of the spacer ring (303) that are arranged at intervals in a circumferential direction and rotate around the axis of the tank body (100) for turning over the feed materials; The fine screening mechanism (400) is arranged below the coarse screening mechanism (300), and comprises a conical shell (405) installed in the tank body (100) and a second screen (401) having a through hole (402) at the center thereof; the second screen (401) is provided with a plurality of partitions (403) arranged at intervals in the circumferential direction and moving in the radial direction of the tank body (100), and used to separate the space inside and outside the through hole (402); a plurality of scrapers (404) are provided between the partitions (403) and the tank body (100), and are rotated around the axis of the tank body (100) and move in the radial direction of the tank body (100); a baffle (406) moving in the vertical direction is provided on the outer side of the conical shell (405); when in use, the conical shell (405) cooperates with the baffle (406) to separate the first screen (301) and the second screen (401).

2. The feed material screening device according to claim 1, characterized in that: One end of the screen frame (201) is rotatably mounted on a lifting block (202); the lifting block (202) is sleeved on a vertical rod (203) and connected to a movable end of a first vertical lifting mechanism; the first vertical lifting mechanism is mounted on the tank body (100); a driven gear (204) is provided at one end of the screen frame (201); the driven gear (204) is meshed with a first driving gear (205); the first driving gear (205) is sleeved on a first transmission shaft (206); the first transmission shaft (206) is rotatably mounted on the lifting block (202) and connected to an output end of a first power device.

3. The feed material screening device according to claim 2, characterized in that: The scraper rod (302) is L-shaped, and the end of the horizontal section faces the axis of the tank body (100). The upper end of the scraper rod (302) is inserted into a rotating block (305). The rotating block (305) is rotatably mounted on a gear ring (306). The gear ring (306) is rotatably mounted on the upper end of the tank body (100) and meshes with a second driving gear (307). The second driving gear (307) is sleeved on a second transmission shaft (308). The second transmission shaft (308) is rotatably mounted on the tank body (100) and connected to an output end of a second power device.

4. The feed material screening device according to claim 1, characterized in that: The inner wall of the tank body (100) is provided with an annular groove (101), the bottom of the annular groove (101) is a downwardly inclined slope, two annular plates (102) are provided in the annular groove (101) along its circumferential direction, the first sieve (301) is provided on the inner side of the lower annular plate (102), and the top surface is not higher than the top surface of the lower annular plate (102), the lower annular plate (102) is provided with a plurality of sieve holes along its circumferential direction, and the inner wall of the upper annular plate (102) is provided with a plurality of sieve holes. A plurality of through grooves (103) are provided along the circumferential direction for passing the push plate (304); a notch is also provided on the side wall of the annular groove (101); the notch is located between the two annular plates (102) for discharging feed materials; when the lower end of the spacer ring (303) contacts the annular plate (102) below, the push plate (304) is located between the two annular plates (102); when the push plate (304) is inserted into the through groove (103), the notch is in a closed state; The outer wall of the spacer ring (303) contacts the inner wall of the ring plate (102) above and is slidably connected to the lifting plate (309). One end of the lifting plate (309) passes through the tank body (100) and is connected to the movable end of the second vertical lifting mechanism. The second vertical lifting mechanism is installed on the tank body (100).

5. The feed material screening device according to claim 1, characterized in that: A plurality of mounting plates (407) are provided on the circumferential side of the conical shell (405), one end of the mounting plate (407) is connected to the inner wall of the tank body (100), the baffle plate (406) is annular, and when in use, the bottom surface of the baffle plate (406) abuts against the mounting plate (407), and the inner wall cooperates with the outer wall of the conical shell (405), a plurality of movable plates (428) are provided on the outer side of the baffle plate (406) along the circumferential direction, a plurality of through grooves (104) are provided on the side edge of the tank body (100) along the circumferential direction, the movable plates (428) pass through the through grooves (104) and are connected to the movable end of the third vertical lifting mechanism, the third vertical lifting mechanism is installed on the outer side of the tank body (100), and closing plates (429) are provided on the upper and lower sides of the baffle plate (406) along the circumferential direction for closing the through grooves (104).

6. The feed material screening device according to claim 5, characterized in that: The partition (403) is arc-shaped. When the partitions (403) are in contact with each other, they form a ring. The outer wall of the partition (403) is provided with a connecting plate (408). The connecting plate (408) is sleeved on a support rod (409). The support rod (409) is installed on a bracket (410). A first spring (411) is sleeved on the support rod (409). Two ends of the first spring (411) are respectively abutted against the connecting plate (408) and the upper end of the bracket (410), and are always in a compressed state. A cross bar (412) is provided on the side wall of the bracket (410), a convex plate (413) is provided on the bottom surface of the mounting plate (407), the cross bar (412) passes through the convex plate (413) and the tank body (100) in sequence, a second spring (414) is sleeved on the cross bar (412), two ends of the second spring (414) respectively abut against the bracket (410) and the convex plate (413), and are always in a compressed state.

7. The feed material screening device according to claim 6, characterized in that: A support ring (415) is provided on the outside of the tank body (100), the cross bar (412) is passed through the support ring (415), and a clamping plate (416) is provided at the end thereof, the lower end of the clamping plate (416) exceeds the bottom surface of the support ring (415), and the inner side cooperates with a limiting ring (417), the limiting ring (417) rotates around its own axis and is installed on the support ring (415), the limiting ring (417) comprises a plurality of first arc segments, a second arc segment is provided between two adjacent first arc segments, the first arc segment and the second arc segment are connected to each other by a transition segment, and the diameters of the first arc segment and the second arc segment are unequal.

8. The feed material screening device according to claim 1, characterized in that: A rotating ring (418) is provided above the scraper (404) and is rotated around its own axis and installed on the inner wall of the tank body (100). A plurality of connecting rods (419) are provided inside the rotating ring (418) and are arranged at intervals along the circumferential direction. A protruding rod (420) is provided above the connecting rod (419). A sliding groove (421) is provided on the connecting rod (419) and the protruding rod (420) along their length direction. Two through rods (422) are provided on the top surface of the scraper (404). The through rods (422) are inserted into the sliding grooves (421). A retaining ring (423) is provided on the through rod (422) and a snap ring (424) is sleeved thereon. The retaining ring (423) and the snap ring (424) are both located Between the connecting rod (419) and the protruding rod (420), a third spring (425) is sleeved on the through rod (422), and two ends of the third spring (425) respectively abut against the retaining ring (423) and the snap ring (424), and are always in a compressed state; a protrusion (430) is provided on the side of one of the snap rings (424), and a side rod (431) is penetrated through the protrusion (430), and one end of the side rod (431) is connected to the protruding rod (420); a fourth spring (432) is sleeved on the side rod (431), and two ends of the fourth spring (432) respectively abut against the end of the protrusion (430) and the protruding rod (420), and are always in a compressed state.

9. The feed material screening device according to claim 8, characterized in that: An arc-shaped rod (426) is provided at the upper end of the penetration rod (422) away from the center of the tank body (100), and a plurality of pressure plates (427) arranged at intervals are provided on the bottom surface of the baffle (406) along the circumferential direction. The pressure plates (427) are arc-shaped, and the lower ends thereof are inclined toward the central axis of the tank body (100). When in use, the arc-shaped rod (426) contacts the outer wall of the pressure plate (427), and the length of the arc-shaped rod (426) is greater than the distance between two adjacent pressure plates (427).

10. The feed material screening device according to claim 1, characterized in that: The top surface of the first screen (301) is in the shape of an arc that gradually descends from the center to the periphery, and the top surface of the second screen (401) is in the shape of an inwardly concave arc.

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