A vibrating feed screening and cleaning device

Abstract

The present invention discloses a vibrating feed screening and cleaning device, and relates to the technical field of screening and cleaning devices. A vibrating feed screening and cleaning device comprises a base frame, and also comprises: a mounting frame vibratingly arranged on the base frame, a screen for screening is installed on the mounting frame; a material receiving plate, located below the screen; the present invention can respectively achieve the problem of scraping the screen surface and concentrating on spraying gas to clean the blockage of the screen when the first scraper arm and the second scraper arm move back and forth in the screen, effectively improving the screening performance of the screen, thereby improving the accuracy and efficiency of feed screening, and in the process of the first scraper arm and the second scraper arm moving from the left side to the right side of the screen, the feed in the middle of the screen is dispersed to both sides, and at the same time, the feed is collided with the paddle plate, and the clumped feed on the screen is dispersed, thereby effectively screening the clumped feed.

Description

Technical Field

[0001] The invention belongs to the technical field of screening and cleaning devices, and in particular relates to a vibrating feed screening and cleaning device. Background Art

[0002] Vibrating screen is an important equipment for solid material classification. It is widely used in chemical, pharmaceutical, food, mining, ceramics, non-ferrous metals, organic and inorganic, metallurgy, rubber and plastic, coatings and pigments, environmental protection, military and other industries. It is also a commonly used screening equipment in the feed production process.

[0003] In the current feed processing technology, after the bulk powder is pressed into granules by a granulator, it needs to be screened by a vibrating screening device to extract finished feed with qualified particle size, so as to screen out feed with different particle sizes required at different stages; and the screening method mostly uses the screen to vibrate, so that unqualified feed passes through the screen for separation, but in actual use, the feed is easy to be blocked and stuck in the holes of the screen, resulting in a decrease in the number of holes and a significant decrease in screening efficiency. It is very dangerous to manually clean the screening machine during operation, so it is difficult to clean the blocked screening holes of the working screening machine. For this reason, we propose a vibrating feed screening and cleaning device. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a vibrating feed screening and cleaning device that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a vibrating feed screening and cleaning device, including a base frame, and also including: a mounting frame vibratingly arranged on the base frame, a screen for screening is installed on the mounting frame; a material receiving plate, located below the screen; a connecting arm with sliding rods fixedly connected at both ends; a connecting frame, the sliding rods at both ends of the connecting arm are respectively connected to the connecting frame, and the connecting arm is respectively connected with a first scraper arm and a second scraper arm, the first scraper arm and the second scraper arm are located in the mounting frame, and air holes are opened on the opposite surface of the second scraper arm and the screen; when the connecting arm drives the first scraper arm and the second scraper arm to move from one side of the screen to the other side, the first scraper arm and the second scraper arm contact the screen to scrape the material stuck in the holes of the screen; when the first scraper arm and the second scraper arm return from the other side of the screen, the first scraper arm and the second scraper arm rise to form a gap with the surface of the screen, and the air holes are opened to spray air flow to the screen.

[0006] Preferably, connecting shafts are fixedly connected on both sides of both ends of the installation frame, a connecting sleeve is rotatably connected to the connecting shaft, a first spring is fixedly connected to the connecting sleeve, the first spring is fixedly connected to the base frame, and a vibration motor is installed on one side of the installation frame.

[0007] Preferably, the connecting frame is provided with an installation groove, a slider is slidably connected in the installation groove, the sliding rod is slidably connected to the slider, second springs are fixedly connected on both sides of the slider, the second spring is fixedly connected to the connecting frame, a guide rod is slidably connected to the connecting frame, and one end of the guide rod is fixedly connected to the slider.

[0008] Preferably, a mounting arm is fixedly connected to the connecting frame, a second cylinder is fixedly connected to the mounting arm, the telescopic end of the second cylinder is against the connecting arm, so as to drive the first scraper arm and the second scraper arm to contact the surface of the screen; the mounting arm is fixedly connected to the first cylinder, a slip ring is fixedly connected to the telescopic end of the first cylinder, the slip ring is sleeved on the sliding rod, and the sliding rod is located on both sides of the slip ring and fixedly connected with limiting rings, so as to drive the first scraper arm and the second scraper arm to reciprocate on the screen.

[0009] Preferably, a plurality of first connecting grooves are provided on a surface of the first scraper arm and the second scraper arm close to the screen, the air holes are connected to the first connecting grooves, a sealing plate is symmetrically rotatably connected to the first connecting grooves through a torsion spring, and when the sealing plate is opened in a V shape, the air holes are opened.

[0010] Furthermore, a diverter plate is fixedly connected to the middle of the screen to divert the material on the screen.

[0011] Furthermore, the diverter plate is provided with a plurality of second connecting grooves, a paddle plate is rotatably connected to the second connecting groove by a torsion spring, a plurality of spray holes are provided on opposite surfaces of the first scraper arm and the second scraper arm, and an overflow valve is installed in the spray hole; when the first scraper arm and the second scraper arm contact the surface of the screen and move from one side of the screen to the other side, the spray hole opens, and the spray hole on the second scraper arm blows the paddle plate to rotate toward the first scraper arm, and paddles the material at the diverter plate to one side of the screen; when the first scraper arm gradually approaches the diverter plate, the spray hole on the first scraper arm blows the paddle plate to rotate toward the second scraper arm, and paddles the material at the diverter plate to the other side of the screen; when the first scraper arm and the second scraper arm return from the other side, the spray hole is closed, and the gas is concentratedly sprayed out from the air hole.

[0012] Preferably, an air passage is provided in the first scraper arm and the second scraper arm, the air hole and the spray hole are connected to the air passage, and an air pipe joint is installed on the first scraper arm and the second scraper arm.

[0013] Furthermore, a material guide plate is fixedly connected to one end of the installation frame.

[0014] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention can scrape the surface of the screen and clean the blockage of the screen by concentratedly spraying gas when the first scraper arm and the second scraper arm move back and forth in the screen, thereby effectively improving the screening performance of the screen, and further improving the accuracy and efficiency of feed screening; and when the first scraper arm and the second scraper arm move back and forth in the screen, through the spray holes opened on the first scraper arm and the second scraper arm, the feed in the middle of the screen can be dispersed to both sides in the process of the first scraper arm and the second scraper arm moving from the left side to the right side of the screen, and at the same time, the feed is caused to collide with the paddle to break up the clumped feed on the screen, thereby effectively screening the clumped feed.

[0015] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a vibrating feed screening and cleaning device proposed by the present invention Figure 1 ;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a vibrating feed screening and cleaning device proposed by the present invention Figure 2 ;

[0019] Figure 3 A vibrating feed screening and cleaning device proposed by the present invention Figure 2 The structural diagram at A in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the first cylinder and the second cylinder of a vibrating feed screening and cleaning device proposed by the present invention;

[0021] Figure 5 A schematic structural diagram of a first scraper arm and a second scraper arm of a vibrating feed screening and cleaning device proposed by the present invention;

[0022] Figure 6 A schematic diagram of the structure of a blocking plate of a vibrating feed screening and cleaning device proposed by the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the spray hole and airway of a vibrating feed screening and cleaning device proposed by the present invention;

[0024] Figure 8It is a schematic diagram of the contact between the first scraper arm, the second scraper arm and the screen;

[0025] Fig. 9 Schematic diagram of the unfolded symmetrical blocking plate.

[0026] In the figure: 1. base frame; 10. receiving plate; 11. mounting frame; 111. connecting shaft; 112. first spring; 113. connecting sleeve; 114. vibration motor; 12. screen; 13. connecting arm; 131. sliding rod; 14. connecting frame; 141. mounting groove; 142. sliding block; 143. second spring; 144. guide rod; 145. limiting ring; 146. first cylinder; 147. sliding ring; 15. mounting arm; 151. second cylinder; 16. guide plate; 2. first scraper arm; 20. air pipe joint; 21. first connecting groove; 22. blocking plate; 23. limiting wall; 24. airway; 25. air hole; 26. spray hole; 3. second scraper arm; 4. diverter plate; 41. second connecting groove; 42. dial plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0028] The following is combined with Figure 1 -Attached Fig. 9 , describes in detail the technical solutions provided by each embodiment of the present invention.

[0029] Example 1: Reference Figure 1-Figure 9 A vibrating feed screening and cleaning device comprises a base frame 1, and further comprises: a mounting frame 11 vibratingly arranged on the base frame 1, a screen 12 for screening is mounted on the mounting frame 11; a material receiving plate 10, located below the screen 12; a connecting arm 13 with sliding rods 131 fixedly connected at both ends; a connecting frame 14, the material receiving plate 10 is connected to the connecting frame 14, the sliding rods 131 at both ends of the connecting arm 13 are respectively connected to the connecting frame 14, and the connecting arm 13 is respectively connected to a first scraping arm 2 and a second scraping arm 3, and the first scraping arm 2 and the second scraping arm 3 are respectively connected to the connecting arm 13. In the installation frame 11, air holes 25 are provided on the opposite surfaces of the second scraper arm 3 and the screen 12; when the connecting arm 13 drives the first scraper arm 2 and the second scraper arm 3 to move from one side of the screen 12 to the other side, the first scraper arm 2 and the second scraper arm 3 contact the screen 12 to scrape the materials stuck in the holes of the screen 12; when the first scraper arm 2 and the second scraper arm 3 return from the other side of the screen 12, the first scraper arm 2 and the second scraper arm 3 rise to form a gap with the surface of the screen 12, and the air holes 25 open to spray airflow toward the screen 12;

[0030] A connecting shaft 111 is fixedly connected to both sides of both ends of the installation frame 11, a connecting sleeve 113 is rotatably connected to the connecting shaft 111, a first spring 112 is fixedly connected to the connecting sleeve 113, the first spring 112 is fixedly connected to the bottom frame 1, and a vibration motor 114 is installed on one side of the installation frame 11;

[0031] The connecting frame 14 is provided with a mounting groove 141, a slider 142 is slidably connected in the mounting groove 141, the slide bar 131 is slidably connected to the slider 142, second springs 143 are fixedly connected to both sides of the slider 142, the second spring 143 is fixedly connected to the connecting frame 14, a guide rod 144 is slidably connected to the connecting frame 14, and one end of the guide rod 144 is fixedly connected to the slider 142;

[0032] The connecting frame 14 is fixedly connected with a mounting arm 15, and the mounting arm 15 is fixedly connected with a second cylinder 151, and the telescopic end of the second cylinder 151 abuts against the connecting arm 13, so as to drive the first scraper arm 2 and the second scraper arm 3 to contact the surface of the screen 12; the mounting arm 15 is fixedly connected with a first cylinder 146, and the telescopic end of the first cylinder 146 is fixedly connected with a slip ring 147, and the slip ring 147 is sleeved on the slide rod 131, and the slide rod 131 is located on both sides of the slip ring 147 and is respectively fixedly connected with a limiting ring 145, so as to drive the first scraper arm 2 and the second scraper arm 3 to reciprocate on the screen 12;

[0033] A plurality of first connecting grooves 21 are provided on one surface of the first scraper arm 2 and the second scraper arm 3 near the screen 12, and the air holes 25 are connected to the first connecting grooves 21. The first connecting grooves 21 are symmetrically connected to the blocking plates 22 by torsion springs. When the blocking plates 22 are opened in a V shape, the air holes 25 are opened. A guide plate 16 is fixedly connected to one end of the mounting frame 11.

[0034] When the device is in use, the feed is poured from the guide plate 16 at one end of the mounting frame 11 onto the screen 12, and the screen 12 is vibrated by the vibration motor 114, so that the feed moves from one end of the screen 12 to the other end, and the screened feed falls from the end of the screen 12 away from the guide plate 16 for collection, and the screened and separated feed falls on the receiving plate 10 below after passing through the screen 12, and is collected in a centralized manner;

[0035] During the screening process, the first cylinder 146 will reciprocate and push the slide bar 131, so that the slide bar 131 and the connecting arm 13 slide on the connecting frame 14, thereby driving the first scraper arm 2 and the second scraper arm 3 to move back and forth on the screen 12. When the first scraper arm 2 and the second scraper arm 3 move from the left side to the right side of the screen 12 (the left and right directions are temporarily used for the convenience of explaining the working process, and are represented by Figure 1 perspective as an example);

[0036] The telescopic end of the second cylinder 151 extends, pushing the connecting arm 13, so that the connecting arm 13 moves downward in the installation groove 141, thereby making the first scraper arm 2 and the second scraper arm 3 contact the surface of the screen 12. At this time, the telescopic end of the first cylinder 146 retracts, pulling the sliding rod 131, thereby making the first scraper arm 2 and the second scraper arm 3 move to the right side of the screen 12, and scrape and remove the feed blocked in the holes of the screen 12 during the movement. Subsequently, when the telescopic end of the first cylinder 146 extends and pushes the sliding rod 131, the first scraper arm 2 and the second scraper arm 3 will move from the right side of the screen 12 to the left side of the screen 12. At the same time, the telescopic end of the second cylinder 151 retracts, and the sliding rod 131 and the connecting arm 13 are reset under the influence of the second spring 143, so that a gap is formed between the first scraper arm 2, the second scraper arm 3 and the surface of the screen 12. At this time, the gas in the air hole 25 pushes the blocking plate 22 to expand outward from the first connecting groove 21 to form a V shape (refer to Fig. 9 ), the gas ejected from the air hole 25 blows onto the screen 12 to block and clean the holes on the screen 12;

[0037] In addition, the blocking plate 22 is in a V-shape when unfolded, which can concentrate the gas ejected from the air hole 25 to avoid dispersion, thereby effectively improving the cleaning effect of the screen 12;

[0038] It should be noted that the V-shaped expansion shape of the blocking plate 22 is limited by the limiting wall 23 on the first connecting groove 21;

[0039] After the blocking plate 22 is unfolded, and during the movement of the first scraper arm 2 and the second scraper arm 3 from the right to the left, the blocking plate 22 can also scrape the screen 12 during the contact with the screen 12, further improving the cleaning effect of the surface of the screen 12;

[0040] Therefore, when the first scraper arm 2 and the second scraper arm 3 in the device move back and forth in the screen 12, they can respectively scrape the surface of the screen 12 and concentrate on spraying gas to clean the blockage of the screen 12, thereby effectively improving the screening performance of the screen 12, and thereby improving the accuracy and efficiency of feed screening.

[0041] Example 2: Reference Figure 1-Figure 9 , a vibrating feed screening and cleaning device, which is basically the same as the embodiment 1, and furthermore: a diverter plate 4 is fixedly connected to the middle of the screen 12 to divert the material on the screen 12;

[0042] A plurality of second connecting grooves 41 are provided on the diverter plate 4, and a paddle plate 42 is rotatably connected to the second connecting groove 41 through a torsion spring. A plurality of spray holes 26 are provided on the opposite surfaces of the first scraper arm 2 and the second scraper arm 3, and an overflow valve is installed in the spray hole 26; when the first scraper arm 2 and the second scraper arm 3 contact the surface of the screen 12 and move from one side of the screen 12 to the other side, the spray holes 26 are opened, and the spray holes 26 on the second scraper arm 3 blow the paddle plate 42 to rotate toward the first scraper arm 2, and paddle the material at the diverter plate 4 to one side of the screen 12; when the first scraper arm 2 gradually approaches the diverter plate 4, the spray holes 26 on the first scraper arm 2 blow the paddle plate 42 to rotate toward the second scraper arm 3, and paddle the material at the diverter plate 4 to the other side of the screen 12; when the first scraper arm 2 and the second scraper arm 3 return from the other side, the spray holes 26 are closed, and the gas is concentrated and sprayed out from the air holes 25;

[0043] An air passage 24 is provided in the first scraper arm 2 and the second scraper arm 3, and the air hole 25 and the spray hole 26 are connected to the air passage 24. An air pipe joint 20 is installed on the first scraper arm 2 and the second scraper arm 3;

[0044] In this embodiment, further, the diverter plate 4 is provided to prevent the feed from being concentrated in the middle of the screen 12 during the vibration screening process, resulting in less feed on both sides of the screen 12, which leads to a decrease in screening efficiency.

[0045] In addition, the spray holes 26 are provided on the opposite sides of the first scraper arm 2 and the second scraper arm 3, and a plurality of rotating plates 42 are provided at equal intervals on the diverter plate 4, so as to Figure 1 Taking the perspective as an example, when the first scraper arm 2 and the second scraper arm 3 move from the left side to the right side of the screen 12, the gas continuously supplied to the air passage 24 will be unable to be deployed due to the contact between the first scraper arm 2 and the second scraper arm 3 and the surface of the screen 12, and the air hole 25 will be unable to spray gas outward, so the gas pressure in the air passage 24 increases, breaking through the resistance of the overflow valve and spraying out from the spray hole 26; Figure 1 For example, the second scraper arm 3 is close to the right side of the diverter plate 4. At this time, the gas ejected from the spray hole 26 of the second scraper arm 3 will push the paddle 42 to rotate toward the first scraper arm 2, thereby pushing the feed on the left side of the diverter plate 4 to move to the left side of the screen 12, so that the feed on the screen 12 is further dispersed, thereby improving the screening effect of the feed;

[0046] When the first scraper arm 2 and the second scraper arm 3 gradually approach the right side of the screen 12, the second scraper arm 3 will gradually move away from the diverter plate 4, while the first scraper arm 2 will gradually approach the diverter plate 4. At this time, the spray hole 26 on the first scraper arm 2 will push the paddle 42 to rotate toward the second scraper arm 3, pushing the feed on the right side of the diverter plate 4 to the right side of the screen 12, so that the feed in the middle of the screen 12 is dispersed to the right side, thereby improving the screening effect of the feed;

[0047] In addition, when the paddle plate 42 rotates toward the first scraper arm 2, the feed between the first scraper arm 2 and the diverter plate 4 will be pushed toward the paddle plate 42 by the gas ejected from the spray hole 26, so that part of the agglomerated feed can be broken up, thereby effectively screening the agglomerated feed. Therefore, the device can not only disperse the feed through the arrangement of the spray hole 26 during the movement of the first scraper arm 2 and the second scraper arm 3 from the left side to the right side of the screen 12, but also break up the agglomerated feed on the screen 12 during the displacement of the first scraper arm 2 and the second scraper arm 3.

[0048] In addition, the paddle 42 can also scrape and clean the feed stuck on the surface of the screen 12 during the left and right rotation process, further promoting the cleaning effect of the screen 12;

[0049] When the first scraper arm 2 and the second scraper arm 3 move from the right side to the left side of the screen 12, a gap is formed between the first scraper arm 2, the second scraper arm 3 and the surface of the screen 12, and the sealing plate 22 is blown open by the gas in the air hole 25. At this time, the gas pressure in the air channel 24 is reduced and cannot break through the resistance of the overflow valve in the spray hole 26, so that the gas in the air channel 24 is concentrated and sprayed out from the air hole 25, so as to efficiently clean the screen 12.

[0050] Therefore, the present invention can scrape the surface of the screen 12 and clean the blockage of the screen 12 by concentratedly spraying gas when the first scraper arm 2 and the second scraper arm 3 move back and forth in the screen 12, thereby effectively improving the screening performance of the screen 12, and further improving the accuracy and efficiency of feed screening; and when the first scraper arm 2 and the second scraper arm 3 move back and forth in the screen 12, through the spray holes 26 opened on the first scraper arm 2 and the second scraper arm 3, the feed in the middle of the screen 12 can be dispersed to both sides during the movement of the first scraper arm 2 and the second scraper arm 3 from the left side to the right side of the screen 12, and at the same time, the feed is caused to collide with the paddle 42, so that the clumped feed on the screen 12 is broken up, thereby effectively screening the clumped feed.

[0051] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A vibrating feed screening and cleaning device, comprising a base frame (1), characterized in that: Also includes: A mounting frame (11) is vibrated and arranged on the base frame (1), wherein a screen (12) for screening is installed on the mounting frame (11); A receiving plate (10) located below the screen (12); A connecting arm (13) with sliding rods (131) fixedly connected at both ends; A connecting frame (14), wherein the sliding rods (131) at both ends of the connecting arm (13) are respectively connected to the connecting frame (14), and the connecting arm (13) is respectively connected to a first scraper arm (2) and a second scraper arm (3), wherein the first scraper arm (2) and the second scraper arm (3) are located in the mounting frame (11), and an air hole (25) is provided on a surface of the second scraper arm (3) opposite to the screen (12); When the connecting arm (13) drives the first scraper arm (2) and the second scraper arm (3) to move from one side of the screen (12) to the other side, the first scraper arm (2) and the second scraper arm (3) come into contact with the screen (12) to scrape the material stuck in the holes of the screen (12); When the first scraper arm (2) and the second scraper arm (3) return from the other side of the screen (12), the first scraper arm (2) and the second scraper arm (3) rise to form a gap between them and the surface of the screen (12), and the air hole (25) opens to spray airflow toward the screen (12); A diverter plate (4) is fixedly connected to the middle of the screen (12) for diverting the material on the screen (12); The diverter plate (4) is provided with a plurality of second connecting grooves (41), a shifting plate (42) being rotatably connected to the second connecting grooves (41) via a torsion spring, a plurality of spray holes (26) being provided on opposing surfaces of the first scraper arm (2) and the second scraper arm (3), and a relief valve being installed in the spray hole (26); When the first scraper arm (2) and the second scraper arm (3) are in contact with the surface of the screen (12) and move from one side of the screen (12) to the other side, the spray hole (26) opens, and the spray hole (26) on the second scraper arm (3) blows the paddle plate (42) to rotate toward the first scraper arm (2), thereby paddles the material at the diverter plate (4) toward one side of the screen (12); When the first scraper arm (2) gradually approaches the diverter plate (4), the spray hole (26) on the first scraper arm (2) blows the paddle plate (42) to rotate toward the second scraper arm (3), thereby paddles the material at the diverter plate (4) to the other side of the screen (12); When the first scraper arm (2) and the second scraper arm (3) return from the other side, the spray hole (26) is closed, and the gas is concentratedly sprayed out from the gas hole (25).

2. A vibrating feed screening and cleaning device according to claim 1, characterized in that: A connecting shaft (111) is fixedly connected to both sides of both ends of the installation frame (11); a connecting sleeve (113) is rotatably connected to the connecting shaft (111); a first spring (112) is fixedly connected to the connecting sleeve (113); the first spring (112) is fixedly connected to the base frame (1); and a vibration motor (114) is installed on one side of the installation frame (11).

3. A vibrating feed screening and cleaning device according to claim 1, characterized in that: The connecting frame (14) is provided with a mounting groove (141), a slider (142) is slidably connected in the mounting groove (141), the slide bar (131) is slidably connected to the slider (142), second springs (143) are fixedly connected to both sides of the slider (142), the second spring (143) is fixedly connected to the connecting frame (14), a guide rod (144) is slidably connected to the connecting frame (14), and one end of the guide rod (144) is fixedly connected to the slider (142).

4. A vibrating feed screening and cleaning device according to claim 3, characterized in that: The connecting frame (14) is fixedly connected to a mounting arm (15), and the mounting arm (15) is fixedly connected to a second cylinder (151), wherein the telescopic end of the second cylinder (151) abuts against the connecting arm (13) to drive the first scraper arm (2) and the second scraper arm (3) to contact the surface of the screen (12); The mounting arm (15) is fixedly connected to a first cylinder (146), the telescopic end of the first cylinder (146) is fixedly connected to a slip ring (147), the slip ring (147) is sleeved on a slide rod (131), and the slide rod (131) is fixedly connected to limit rings (145) on both sides of the slip ring (147) for driving the first scraper arm (2) and the second scraper arm (3) to reciprocate on the screen (12).

5. A vibrating feed screening and cleaning device according to claim 4, characterized in that: A plurality of first connecting grooves (21) are formed on a surface of the first scraper arm (2) and the second scraper arm (3) close to the screen (12); the air holes (25) are connected to the first connecting grooves (21); and a blocking plate (22) is symmetrically rotatably connected to the first connecting grooves (21) via a torsion spring. When the blocking plate (22) is opened in a V-shape, the air hole (25) is opened.

6. A vibrating feed screening and cleaning device according to claim 1, characterized in that: An air passage (24) is provided in the first scraper arm (2) and the second scraper arm (3); the air hole (25) and the spray hole (26) are connected to the air passage (24); and an air pipe joint (20) is installed on the first scraper arm (2) and the second scraper arm (3).

7. A vibrating feed screening and cleaning device according to claim 1, characterized in that: One end of the installation frame (11) is fixedly connected to a material guide plate (16).

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